BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates generally to the field of stretchers, gurneys and other wheeled supports of patients, and specifically to mobile patient support devices capable of accommodating one or more standing attendants, administering medical care to the patient while being simultaneously transported with the patient to the appropriate treatment area. 2. Description of Related Art Patient stretchers, gurneys and supports are well known in the art for mobile transport of a medical patient. A bedded horizontal platform may include wheels, swivel and rotatable casters, adjustable height and tilt mechanisms, foot pedals for controlling movement of the patient support surface, push handles for mobility, lifts to elevate and lower the patient support surface, and shrouds for accommodating instruments. There is a need to safely administer emergency and often life-saving medical care while transporting a patient to another area and with the health care attendant ' s total devotion to the task of rendering emergency treatment rather than having to be distracted by concentrating on avoiding obstacles in transit and dangerously running alongside the stretcher during the often lengthy encumbered itinerary to the _ o —

appropriate treatment area. It is usually not medically preferential to delay ,such care or to perform the life saving/stabilizing medical procedures before transporting the patient to the ultimate treatment destination. For example, in some instances, such as in the case of a patient in cardiac arrest, cardiopulmonary resuscitation (CPR) must be maintained continuously until a heartbeat is restored, and it is not possible to suspend CPR long enough to move the patient more than a few feet. Therefore, when performing CPR, it is not currently possible for the attendants to be mobile. The present invention solves this problem by allowing the patient to be moved while one or two attendants stand on the mobile platform(s) and administer critical care while the patient is being moved to the appropriate area of treatment. A few minutes saved by the simultaneous rather than sequential administration of these procedures may be the difference in the preserving or losing of human life during some medical emergencies, all while enhancing the safety of the attendant. A major problem with mobile stretchers or patient transport units on which an attendant could travel with the patient is that the attendant may fall off the stretcher during rapid transit or turning a corner when the attendant's focus is and should be solely on the patient and the rendering of medical care, as opposed to being concerned with maintaining balance and preventing his or her own fall during transit. Although most prior art stretchers and patient transport units adequately protect the patient from falling or rolling off during transit, the few in which the attendant travels on the stretcher frame with the patient do not provide physical safeguards to the attendant and the platform does not provide adequate space for movement or stability of the attendant. The prior art also does not provide for more than one attendant being able to travel safely with the patient as there are many circumstances in which, for example, a patient needs to receive manual ventilation support in the head region, while I.V. lines and CPR are being administered on the longitudinal side of the patient. Single platform attendant support devices do not adequately solve this problem. One such wheeled patient support having a platform is disclosed in U.S. Patent No. 4,190,280 issued to Donohoe in which a platform is secured laterally beyond the periphery of the stretcher in the general body supporting area with a rolling surface mounted to and beneath the platform. In Donohoe, there is only one platform on the side of the patient, and none at the head, and the platform is substantially shorter in length than the length of the patient support surface, has no attached railing to safeguard the attendant from falling during transit, merely mounts to the lower frame, and requires a wheel for support. The assembly must also be stable vertically so that the additional attendant weight on the sides of the assembly do not create center of gravity shifts that could result in the assembly being unstable or tipping over.

BRIEF SUMMARY OF THE INVENTION A mobile medical patient transport assembly having a patient bed mounted on and above a flat, horizontal, rigid, mobile support frame, with attendant support platforms that are integrated into or extend outwardly from the assembly frame for supporting one or more attendants at the side and/or head of the assembly. Safety rails are provided above the platform to aid the attendants with balance and to prevent them from falling off the platform during transit. This assembly has wheels and a stretcher or mattress so as to support and transport a patient in a supine position along with one or more standing attendants rendering medical care at the side and/or head of the patient without risk of falling off the assembly or tipping over the assembly. The assembly comprises an upper bed supporting frame and a lower supporting frame connected by vertical supports. Attendant support platforms for supporting one or more attendants on one side or/and at one end of the bed are attached to or emanate from the lower frame. The upper frame has a rigid, planar patient mattress support deck connected to the upper frame, to receive a patient support surface such as a mattress or pad or to allow the patient to be placed directly on the support deck without a mattress or pad. Four wheels are connected underneath the lower frame so as to be in contact with and for moving the assembly over the floor surface. The wheel (s) at the second end (foot end) of the assembly preferably swivel (s) , which permits the assembly to turn corners more easily by reducing the turning radius required, and the two wheels at the first end (head end) of the assembly preferably rotate but do not swivel, allowing circumferential wheel rotation for control. All of the wheels, however, could either swivel or could rotate, depending on preference. In some variations, a single swivel wheel can be used at the second (foot) end to enhance maneuverability. The two attendant support platforms contained within horizontal and vertical safety railings perpendicularly attached thereto, are integrated into and within the lower frame in one embodiment, or are attached to and emanate from the lower frame in an another embodiment. One attendant support platform is attached laterally on one side of the assembly along the length of the lower frame, and a second attendant support platform can be attached either along the width of the first end of the lower frame portion which is intended to be the end where the patients head lies, or can be attached laterally along the length of the lower frame opposite the other platform. Both attendant support platform sections are positioned well below the patient bed support surface, horizontally above the floor surface and substantially parallel to the floor surface, such that an attendant can stand close to the patient support surface to reach the patient thereon to render medical care while the patient, the attendants and the assembly are being wheeled to an area of treatment. The attendant support platforms are fixed and integrated into the lower frame of the assembly in one embodiment, and in another embodiment are attached to and protrude from the lower frame assembly, and may be fixed, or retractable or removable for storage or transport through narrow doorways. If retractable, the attendant support platforms can be folded and secured upward, or telescope or slide into the frame employing various methods for doing so. When the attendant support platforms are retractable, the safety railings can also be retracted by folding or collapsing against the sides of the assembly or telescoping into the frame of the assembly. This retracting feature narrows the width and shortens the length of the assembly thereby requiring less space for storage, and permitting the assembly to fit more easily through narrow doorways. The safety railings are attached to the attendant support platforms and may also be attached to the upper and the lower frame of the assembly, and the vertical support members, and are open at one or both ends to enable entry and exit by the attendants. When open at only one end, the safety railings may also attach to the upper frame and vertical supports. The function of the safety railings is to inhibit falls and enhance the support and balance of the attendants while administering medical care during transport of the patient . The wheels are attached to the lower frame at the outboard limits of the frame members (corners) to enhance vertical stability to prevent leaning or tipping over with one or two attendants standing on the attendant support platform(s) ; however, the wheels can be placed at any location provided the assembly is stable. For instance, the attendant support platforms can have swivel wheels or casters attached to the bottom and making contact with the floor, to provide stability for the assembly while accommodating changes in direction of the assembly when it is turning corners or changing directions in confined areas. In other variations, counterweight (s) may be attached within the frame on the side and/or ends opposite the attendant support platforms positioned to counterbalance the weight of the attendant (s) . Each attendant platform section (side or end) can include an upper traction surface to minimize or prevent foot slippage of an attendant, and may be particularly useful during those times when medications and body fluids may be flowing/dripping uncontrollably or inadvertently onto the platforms uppermost surfaces under the attendant's feet. A pad may be attached to the upper frame above each attendant support platform to provide comfortable padding for the attendants when leaning in to render treatment to the patient. Guard rails may be. included in the vicinity of the patients shoulders and arms to prevent the patients arms from falling off the patient support surface and potentially interfering with the attendant (s) standing on the attendant support platform to the side of the patient. The primary object of the invention is to provide a wheeled patient transport assembly with a patient supine support surface and one or two platforms with physical safeguards, (i.e.' safety' railings), to safely support and transport a patient and at least one or'more medical attendants together with .the patient so that the attendant (s) can deliver emergency medical care to the patient while in transit to an appropriate area of treatment while standing ' on a stable assembly that, cannot lean or tip over with attendants standing on board, and while not having to be concerned with their own safety (i.e. falling off the assembly) . In accordance with these and other objects, which will become apparent hereinafter, the instant invention will now be described with particular reference to the accompanying drawings'. BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS Figure 1 shows a perspective view of the preferred embodiment of the present invention wherein the attendant platform sections (side and end) are contained within the structure of the lower frame of the patient support assembly and are connected to each other and extend for the full length and width of the assembly. Figure IA shows a perspective view of a variation of the preferred embodiment of the present invention with attendant support platforms that extend underneath the upper frame and patient support surface, and shows how patient guard rails and additional vertical supports can be incorporated into the assembly. Figure IB shows a perspective view of a variation of the preferred embodiment of the invention, wherein the head and side attendant platforms are separated and do not extend for the full length and width of the assembly. Figure IC-I is a top plan view of another variation of the preferred embodiment of the present invention wherein the side attendant support platform is located on the opposite side of the assembly. Figure 1C-2 is a top plan view of an alternate embodiment of the present invention where both attendant support platforms are located on the sides of the assembly. Figure ID is a perspective view of yet another variation of the preferred embodiment of the present invention with a simple safety railing construction wherein the safety railings do not connect to the upper frame or vertical support members. Figure IE is a perspective view of another variation of the preferred embodiment of the present invention that shows a more complex safety railing construction wherein the safety railings are connected to the upper frame and vertical support members . Figure IF is a perspective view of another variation of the preferred embodiment of the present invention that incorporates more than four wheels. Figure IG is a perspective view of another variation of the preferred embodiment of the present invention wherein a mechanism for raising and lowering the upper frame and patient support surface replaces the vertical support members, and the safety railings are connected only to the attendant support platforms and lower frame. Figure IH is a top plan view of an alternate embodiment of the present invention with only one attendant support platform and safety railing located at one side of the assembly.

Figure 2 shows a top plan view of the preferred embodiment shown in Figure 1. Figure 3 shows a side elevational view of the preferred embodiment shown in Figure 1 in use while the assembly, the patient, and attendants rendering medical treatment to the patient are being wheeled to an area of treatment. Figure 4 shows a perspective view of an alternate embodiment of the present invention which correlates to Figure 1 in the preferred embodiment. When constructed in this alternate embodiment, the two platform sections are attached to and protruding from the lower frame (instead of being part of the lower frame as in the preferred embodiment) , one from the side and one from the first end of the lower frame. Figure 4A shows a prospective view of the alternate embodiment of the present invention in a very basic configuration, which correlates to Figure ID in the preferred embodiment . Figure 4B is another perspective view of a variation of the alternate embodiment of the present invention wherein the lower frame is smaller in dimension than the upper frame, and the wheels are attached to the lower frame underneath the periphery of the upper frame as opposed to being at the four corners of the outside periphery of the assembly. Figure 4C is a perspective view of another variation of the alternate embodiment of the present invention wherein a the upper frame is mounted on a center support that consists of two strategically placed vertical support members which can either be fixed or adjustable in height by mechanical, electrical, hydraulic or other means. Steering handles can be added at one end of-.the assembly to assist in .the' pushing and steering of the assembly while in use, and a pole can be added at the first end1 of the assembly for hanging IV fluids. Figure 5 shows a top plan view of the alternate embodiment shown in Figure 4.. • . . Figure 6 shows a ' side elevational view of the alternate embodiment shown in Figure 4 in' use while the assembly, the patient, and attendants rendering medical treatment to. the patient are being wheeled to an area of treatment . ■ Figures 7Al and 7A2 show ' a front elevational view, partially cut. away, . of an alternate embodiment showing an attendant support platform and railing in use in Figure 7Al, and the attendant support platform stored against the assembly with the safety .railings and attendant support platform frames telescoping into the frame assembly in Figure 7A2. Figure 7A3 shows a perspective ■ view of the alternate' embodiment illustrated in Figures 7Al and 7A2 demonstrating how the attendant support platform frame sections and . safety railings telescoping into the frame assembly as in Figure 7Al and 7A2 above, with the head end telescoping in above the structure of the lower frame and the side platform section below the structure of the lower frame assembly. Figures 7Bl and 7B2 show a front elevational view, partially cut away, of another alternate embodiment of. the invention showing the attendant support platform and safety railing in use, and with the side attendant platform folding up vertically and the side safety railing beams collapsing and pivoting upwardly and inwardly against the assembly. Figures 7B3 and 7B4 show a front elevational view of yet another similar alternate embodiment with the attendant support platform on the head end of the assembly telescoping in above the lower frame and the safety railing beams collapsing and pivoting upwardly and inwardly against the assembly. Figures 7Cl, 7C2, and 7C3 show a top plan view, partially cut away, of another alternate embodiment showing the attendant support platform sections and railing in use in Figure 7Cl, and then pivotally folding inward against the support assembly frame with a telescoping top railing beam in Figures 7C2 and 7C3. Figures 7Dl and 7D2 show yet another alternate embodiment in perspective with the attendant support platform sections and railings in use in Figure 7Dl, and with platform sections folded up against the assembly and safety railings and platform frames telescoping inwardly into the frame assembly in Figure 7D2. In Figure 7D2, the safety railing is open at only one end, but does not make contact with the attendant support platform. In Figures 7D3 and 7D4 the safety railing has a vertical support member that connects to the attendant support platform frame in prospective view. Figures 7El shows a prospective partially exploded view of an alternate embodiment in a configuration in which the safety- railings and attendant support platforms are removable for storage. Figure 8A shows a bottom plan view of the preferred embodiment with the lower frame of the assembly having a singular swivel wheel on the second end. Figure 8B shows a bottom plan view of an alternate embodiment with the lower frame of the assembly having a singular swivel wheel on the second end. Figure 9 shows a side elevational view of another alternate embodiment having one or more swivel wheel assemblies disposed underneath each attendant support platform 20 and 22 to prevent the assembly from tipping or becoming unstable the attendants are standing on the attendant support platforms 20 and 22. Figure 9A shows a partially cut away underside bottom side elevational view of the swivel wheel assembly 35 in Figure 9 in a configuration in which the swivel wheel 36 can be folded and retracted up against the underside of the attendant support platforms 20 and 22. Figure 1OA shows a perspective view and Figure 1OB shows a bottom plan view of an alternate embodiment with counterweights on the side and end opposite the attendant platforms which are positioned strategically to offset the weight of the attendants and prevent the assembly from tipping or becoming unstable while the attendants are standing on the attendant support platforms 20 and 22. Figures HA and HB show yet another alternate embodiment in side elevational views in which the vertical supports are collapsible together with the retractable attendant support platforms and safety railings, so that the upper and lower frames can be folded together to save space, similar to the methods used with ambulatory stretchers on ambulances . Figures HC and HD show side elevational views of a similar alternate embodiment with a different structure for collapsing the vertical supports to allow the upper and lower frames to be folded together. Figure 12 shows a perspective view of the assembly to illustrate alternate means and methods for constructing and configuring the attendant support platforms and safety railings. While the ideal embodiments of the present invention utilize attendant support platforms and safety railings to support the attendants and protect them from falling off the assembly, other means for supporting the attendants and keeping them on the assembly can be utilized. Figure 12 illustrates concepts of the possibilities by showing two such other means. DETAILED DESCRIPTION OF THE INVENTION The Assembly in General Referring to Figure 1, the invention is shown and comprises a wheeled patient support and transport assembly- shown generally at 10 , having an elongated horizontal-, rigid lower frame 11, a first end 23, a second end 25, and first and second elongated sides.27 and 29 respectively.. Rigid vertical supports' 16 or other similar mechanisms known in the art are used for positioning and supporting the upper frame 12 above the lower frame 11. While four vertical supports 16 are preferred, more or less than four vertical supports 16 can be used, for example as shown in Figure IA, or the upper frame 12" can be attached to an assembly or mechanism that allows the height of the upper frame 12 and patient support deck' 17 to be elevated or lowered as shown in Figure IG, or the upper- frame can be attached to 'the lower frame by 'two'. strategically place vertical support members a as shown in an alternate embodiment in Figure 4C in which the two vertical support members 16 can' either .be fixed, or can be vertically adjustable by electrical, hydraulic, mechanical or other means to allow the upper frame 12 and patient support deck 17 to be elevated or lowered to the desired height . Any other means can be used to attach the upper frame 12 and patient support deck 17 to the lower frame 11 provided they are stable, securely attached and can support the weight of the patient and the stress forces exerted by the attendants while administering treatment to the patient . The patient support and transport assembly 10 is essentially rectangular and shaped like a bed for patient support and transport. The rigid, planar patient support deck 17 can include a padded patient support surface 18 that rests on the patient support deck 17, or the patient can be placed directly on the patient support deck 17. In this preferred embodiment, the upper frame 12 and patient support deck 17 extend from the vertical supports 16, and are shorter in length and narrower in width than the lower frame 11 of the assembly 10 by approximately the same or similar width as the attendant support platforms 20 and 22 so that the lower frame 11 extends beyond the periphery of the upper frame 12 and patient support deck 17 on the end and side where the attendant support platforms 20 and 22 are located. However, the correlation between the dimensions of the upper frame 12 and lower frame 11 can be different as shown in Figure 4B and 4C1 such correlation being irrelevant so long as the assembly 10 is stable. Likewise, the assembly 10 can be constructed in various configurations using various combinations of the features as described herein so long as the assembly 10 is stable and can perform its intended function. Attendant Support Platforms Along the first elongated side 27, of the assembly 10 there is a first rigid attendant support platform 20 at the first elongated side located in general proximity to the patients upper body and torso area, and a second attendant support platform 22 along the first end 23 in general proximity to the patients head area of the mattress surface 18. In this preferred embodiment, the two attendant support platforms 20' and 22 are preferably contained within the lower frame 11 at the first elongated side 27 and at the first end 23 and are shaped and constructed to accommodate the weight and physical dimensions of one or two adult attendants. Each attendant support platform 20 and 22 can occupy the entire length and width of the first elongated side 27 and first end 23 respectively as shown in Figures 1 and IA, or occupy only a portion of the length and width of the first elongated side 27 and first end 23 similar to that shown in Figure IB. The attendant support platforms 20 and 22 can be connected to each other as shown in Figures 1 and IA, or detached from each other as shown in Figure IB. The attendant support platform sections 20 and 22 can end at the outside perimeter of the upper frame 12 as in Figure 1 and IB, or can extend underneath the outside perimeter of the upper frame 12 similar to that shown in Figure IA thereby providing extra toe/foot room for the attendants. The attendant support platform 20 can be placed on the second elongated side 29 as shown from a top view in Figure IC- 1, in which case the upper frame 12, patient support deck 17 and vertical supports 16 are placed such that edges of the first elongated side 27 of the upper frame 12 and patient support deck 17 are in line and even with, or contained within the edges of the lower frame 11 on the first elongated side 27 underneath the patient support deck 17. The attendant support platforms 20 and 22 may also be placed opposite each other and occupy part or all of both elongated sides 27 and 29 as shown from a top view in Figure lC-2. The upper surface of the attendant support platforms 20 and 22 can be exposed, or a tread or friction-inducing surface 54 can be added to provide traction for and prevent slippage of the attendant (s) . A pad 55 as shown in Figures 1 and IA can be attached to the upper frame 12 above each attendant support platform 20 and 22 to provide comfortable padding for the attendant (s) when leaning in to render treatment to the patient, or there can be no padding as shown in Figure IB. In some instances, it may be desirable to have a mechanism for adjusting the height of the upper frame 12 and patient support deck 17 as shown in Figure IH. In other instances where1 space is limited, it may be desirable to have only one attendant support platform 20 as shown in Figure II. In this embodiment, the attendant support platform 20 is sufficiently wide and long to accommodate two adult attendants, and is placed along the first .or second elongated side- 27 or 29 in a position that allows one attendant access to a patients head area and the other attendant access to the' patients upper torso ' area so both attendants can simultaneously administer treatment to the patient. Safety Railings ■ ■ Each • attendant support platform 20 .and 22 includes safety railings' 30 attached at one or more areas to the lower and upper frames 11 and 12 and to the vertical supports 16 and the attendant support platforms • 20 and 22 along the outermost longitudinal .edge of the attendant support platforms 20 and 22. The safety railings 30 are affixed in such a manner, .welded, bolted, screwed, as to withstand the weight of the attendants leaning, falling, or otherwise safely supported by the safety railings 30. The safety railings 30 can extend for the partial length of the attendant support platforms 20 and 22 as shown in Figures 1, and IA, or can extend for the entire length of the attendant support platforms 20 and 22 as shown in Figure IB. To allow for ingress and egress of the attendants, the safety railings 30 can be open at only one end as shown in Figures 1, IA7 and IB, or can be open at both ends- as shown in Figure ID. The safety railings' 30 can be comprised of relatively simple configuration similar to that shown in Figure ID, or more complex configurations similar to that shown in Figures 1, IA, IB, and IE. ' The safety railings 30 ' function to protect the attendant (s) ' from falling and provide an area of balance for the attendant during transport and/or while administering treatment. The safety railings 30 are particularly important during conditions of emergency where rapid transport is desirable and the attendants must devote full concentration' and attention to the patient without being unduly distracted by concerns for their own safety. While safety railings 30 are the preferred means for preventing the attendants from falling off the attendant support platforms, belts, restraints, brackets, supports, braces or other means can be employed for this purpose. Guard Rails ■ In both the preferred and alternate, embodiments and variations thereof, two guard rails 56 can be attached to the upper frame 12 of the assembly 10 along the two elongated sides 27 and 29 in the vicinity of the patient's shoulders and arms as shown in Figure IA. The purpose of these guard rails 56 is to prevent the patient's arms from extending beyond the periphery of the upper frame 12 so that the patient's arms cannot interfere with the attendants. The guard rails 56 protrude above the patient support deck 17 and patient support surface 18 sufficiently to contain the patient's arms within the confines of the upper frame 12, but not extend so far as to interfere with the attendant. The guard rails 56 can be particularly useful when the assembly is constructed in a narrow fashion for use in environments where space is limited or doorways are narrow. The guard rails 56 when included in the assembly 10 can either be fixed or detachable, or can be attached to the upper frame 12 so the guard rails collapse or fold out of the way. The guard rails 56 can be composed of a series of rails as shown on the first elongated side 27 in Figure IA, or a solid piece of material as shown on the second elongated side 29 in Figure IA. If necessary when there is padding 55 attached to the upper frame 12, then this padding 55 is molded or contoured around the area where the guard rails 56 attach to the upper frame 12. Wheels The wheels 44 and 48, two of which 44 are at the first end 23 of the assembly 10, and two of which 48 are at the second end 25 of the assembly 10, are mounted beneath the lower frame 11 either underneath the four corners, underneath the vertical supports 16 or in close proximity to the four corners of the lower frame 11 as shown in Figures I7 IA, IB, IC-I1 1C-2, ID, IE, IF and II; or within the confines of the lower frame 11 away from the outer edges of the lower frame 11 as shown in Figure IG and IH, which gives more foot clearance to the attendants pushing and/or standing around the assembly, or accommodates a mechanism for elevating or lowering the upper frame 12 and patient support surface 17 as shown in Figure IH. Regardless of the configuration or the number of wheels 44 and 48, the wheels 44 and 48 extend downward to contact the floor surface 15. The wheel (s) 48 at the second end 25 of the assembly 10 preferably swivel so as to permit the assembly 10 to turn corners more easily by reducing the turning radius required. The wheels 44 at the first end 23 of the assembly 10 preferably are such as to allow only circumferential wheel rotation for control, however, any sturdy, easy to roll wheel can be used at either end 23 and 25. The wheel location is important to ensure vertical stability of the assembly during transit. Strategically place weights 90 can also be employed for stability as shown in Figures 1OA and 1OB. While four wheels 44 and 48 placed in the four corners of the assembly 10 are the preferred means for moving the assembly 10 across the floor surface 15, any number of wheels or any other means such as castors, bearings, pads or skids composed of metal or a low friction material such as Teflon, nylon or similar materials, air pressure or other means that allow the assembly to be easily moved across the floor surface 15 can be employed, and they can be placed at any position on the lower frame provided that the assembly 10 is vertically stable and does not tip, lean or fall. over. Construction The assembly 10 lower frame 11 and upper frame 12, structural and vertical support frame members 16, attendant support platforms 20 and 22, safety railings 20 and guard rails 56 are preferably constructed of tubular steel, aluminum, or any durable material customarily used for stretchers, gurneys, carts/ and hospital beds,- however, the frame vertical support members can be constructed of any durable, sturdy material' capable of supporting the weight of a patient and the attendants while .still being relatively easily movable- for transport of all. persons to another location by a person or persons pushing or pulling the assembly along the floor surface 15. When constructed of metal, the assembly 10, lower frame 11 and upper frame 12, structural and support frame members 16 can be .connected by welding the respective connecting ends together, in the conventional way, however, .screws, bolts, or other conventional • fasteners can be utilized, particularly when the frame supports, beams, platforms, and sides are constructed of wood or PVC. Regardless of the construction materials selected, the assembly 10 must be strong and durable enough to withstand the weights of the patient and attendants and the stress forces imparted on the assembly 10 during transport, including impact with walls and other devices encountered during emergency- transport of the patient and attendants. PURPOSE AND FUNCTION OF THE INVENTION The purpose of the instant invention is to enable emergency transport of patients in critical medical crises to an appropriate area of treatment like an operating room while one or more medical attendants simultaneously administer medical treatment during transport without the assembly leaning, tipping over or otherwise becoming unstable. Accordingly, the duration of each use is likely to be brief. The patient will be placed on the assembly 10, moved to the appropriate area of treatment and removed from the assembly 10 upon arrival. Therefore, the design and structure of the assembly 10 need only be very basic; however, additional features as discussed throughout can be included to enhance the invention. Figure 1 shows a prospective view of the invention in its preferred embodiment. In the preferred embodiment, the attendant platform platforms side 20 and end 22 are contained within the structure of the lower frame 11 of the assembly 10, and are connected to each other and extend for the full length and width of the assembly 10. Figure 2 shows a top plan view of the preferred embodiment as shown in Figure 1. Figure 3 shows a side view of the assembly 10 in its preferred embodiment while in use. The assembly 10 is in use with the patient 60 laying on the patient support deck 17 or patient support surface 18 with two attendants 65 administering treatment while the assembly 10, patient 60 and attendants 65 are being wheeled to an area of treatment. The two attendants 65 are standing on the attendant support platforms 20 and 22 with adequate working and moving space available on the respective attendant support platforms 20 and 22. The attendant support platform 20 on the first elongated side 27 can be of sufficient length to accommodate a second attendant (not shown) on the same attendant support platform 20. Figures IA, IB, IC-I, lC-2, ID, IE, IF, IG, and IH show variations of the preferred and alternate embodiments of the present invention. In Figure IA, there are more than four vertical supports 16; and the attendant support platforms 20 and 22 protrude beneath the periphery of the upper frame 12 to provide additional toe and foot room for the attendants. Figure IA also includes guard rails 56 to retain the patients arms which may be fixed, detachable or foldable. Figure IB shows a configuration of the preferred embodiment in which the attendant support platforms 10 and 22 do not touch, and do not occupy the entire length and width of the lower frame 11. Figure IC-I shows a top view of the preferred embodiment wherein one of the attendant support platforms 20 is on the second elongated side 29 instead of the first elongated side. Figure 1C-2 shows a top view of the preferred embodiment wherein the two attendant support platforms 20 and 22 are opposite each other and attached to the two elongated sides 27 and 29. Figures ID shows a relatively simple structure for the safety railings 30 having two open ends, and Figure. IE shows a more complex structure of safety railings- 30. Figure IF shows a configuration of the preferred embodiment with more than four wheels 44 and 48. Figure IG- shows a configuration with the upper frame 12 and patient support deck 17 mounted on a mechanism that allows the height of the upper frame 12 and patient support surface 17 to be elevated and. lowered either manually, mechanically, hydraulically, electrically or by other means employable .for raising and lowering a surface. Figure IH shows a configuration with only one attendant support ■ platform .20 which is sufficiently wide and long to accommodate two attendants in .a position where they can render treatment to a patients head and chest area simultaneously. The main differences between the preferred embodiment and alternate embodiments shown' in Figures 4, 4A, 4B, and 4C- are that in the preferred embodiment the attendant support platforms are contained within or integrated into the lower frame of the assembly, whereas in the alternate .embodiments the attendant support platforms are attached to and protrude from the lower frame of the assembly. The alternate embodiment also makes it possible to retrofit existing patient transport mechanisms with attendant support platforms 20 and 22. As with the preferred embodiment, there are similar variations of these alternate embodiments. Some of these variations as shown in Figures 7, 8, 9, 10, 11 and 12 series can be constructed with attendant support platforms 20 and 22 and safety railings 30 that can fold, collapse and/or telescope, wheeled supports underneath the attendant support platforms 20 and 22, counterweights 90 to offset the weight of the attendants standing on the attendant support platforms 20 and 22, and as with the preferred embodiment there may be included mechanisms for elevating and lowering the upper frame 12 and patient support surface 17. Otherwise, the alternate embodiments and their variations are similar in form and function to the preferred embodiment, and can have the same or similar configurations and features. In the alternate embodiment as shown in Figure 4, the lower frame 11 has similar dimensions as the upper frame 12 and the patient support deck 17, or may be smaller or larger in dimension than the upper frame 12 and patient support deck 17. Figure 4A shows a very basic configuration of the alternate embodiment with safety railings 30 that are attached only to the attendant support platforms 20 and 22, and without any added features. Figure 4B shows a configuration of an alternate embodiment with wheels 44 and 48 attached to the lower frame 11 within the confines of the lower frame 11 away from the outer edges as opposed to being at the four corners as shown in other configurations. In Figure 4C the upper frame 12 is mounted on a center support that consists of two strategically placed vertical support members 16 which can either be fixed or adjustable in height by mechanical, electrical, hydraulic or other means . Figure 4C also shows how this or other embodiments can be equipped with steering handles 97 at one end of the assembly 10 to facilitate attendants in the pushing and steering the assembly while in use, and how a pole 98 can be placed at the first end of the assembly for hanging containers to dispense IV fluids to the patient. Figure 5 shows a top view of this alternate embodiment as shown in Figure 4 and Figure 6 shows a view of this alternate embodiment in use. In the alternate embodiment illustrated in Figure 4, the rigid attendant support platforms 20 and 22 are attached to and emanate from the lower frame 11 along the first elongated side 27 and at the first end 23 of the assembly 10. Both attendant support platforms 20 and 22 extend laterally beyond the periphery of the lower frame 11 and upper frame 12, and are shown in an embodiment in which they are fixed in position. As with the preferred embodiment, in this alternate embodiment each attendant support platform 20 and 22 is constructed to accommodate the weight and physical dimension of one or two adult attendants, and may occupy the entire length and width of the first elongated side 27 and first end 23 respectively, or may occupy only a portion of the length and width of the first elongated side 27 and first end 23. As with the preferred embodiment, the attendant support platform 20 may be placed on the second elongated side 29 so that both attendant support platforms 20 and 22 are located opposite each other along part or all of the two elongated sides 27 and 29; a tread or friction-inducing surface 54 may be added to the upper surface of the attendant support platforms 20 and 22; and padding 55 may be added to the upper frame 12 above each attendant support platform 20 and 22. In the alternate embodiments, each attendant support platforms 20 and 22 include safety railings 30 attached at one or more points to the upper frame 12 and/or the lower frame 11 and the vertical supports 16 which are placed along the outermost longitudinal edge of the attendant support platforms 20 and 22. Guard rails can be attached to the upper frame 12 of the assembly 10 along the two elongated sides 27 and 29 in the vicinity of the patients shoulders and arms, and can be fixed, removable, foldable or collapsible. Numerous configurations of alternate embodiments of the invention can be constructed with attendant support platforms 20 and 22 and safety railings 30 that fold, telescope, collapse, retract or are' otherwise, removable in order to save space when the assembly is not being used. The attendant support platforms 20 and 22 are selectively- disposed in a position generally perpendicular to the floor and planarIy adjacent the lower frame 11 and sides 27 and 29 and ends 23' and 25 of the assembly 10 during periods of non-use, and can be conveniently deployed for use. Figures 7Al and 7A2 show a side view of the attendant support platform 20 and safety railings 30 looking from the first end 23. In this configuration, the attendant support platforms 20 and 22 fold from the in-use horizontal position shown in 7Al to a position shown in Figure 7A2, substantially perpendicular to .the floor 15. Figure 7A3 is a view of the assembly ' showing how the attendant support platform frames 57 and 59 slide parallel to the floor surface in a horizontal arrangement within tubular frames 11a and lib mounted in abutting arrangement under and over the lower frame 11 of the assembly 10 such that the tubular beams 11a and lib accommodate the full length of the platform frame beams 57 and 59. The safety railings 30 lay adjacent and flush against the upper frame 12 and lower frame 11 portions of the assembly 10 when in the storage position as shown in Figure 7A2. Figures 7Bl and 7B2 show a side view of the attendant support platform 22 looking from the first elongated side 27. The attendant support platform 22 on the first end 23 is configured to hingedly pivot upwardly from an in-use position parallel to the floor surface shown in Figure 7Bl to a position vertical to the floor surface adjacent and sandwiched between the side of the assembly 10 and the attendant support platform frame 57 and the safety railings 30. The upper part of the safety railing 30 detaches from the upper frame, and the attendant support platform frame hinges 70 and 71, and the safety railing hinge 72 allow rotation of the attendant support platform frame 57 and safety railing members 30 to the shown vertical position in Figure 7B2. Figures 7B3 and 7B4 show a side view of the attendant support platform 20 looking from the second end 25. In this configuration, the attendant support platform 20 slides underneath the assembly 10 and the attendant support platform frame 59 telescopically slides within a separate tubular frame HA situated below the lower frame 11 of the assembly 10 while the safety railing detaches from the upper frame and the safety railing hinge 72 allows rotation of the safety railing members 30 to the shown vertical position in Figure 7B4.

In Figures 7Cl, 7C2, and 7C3, show a top view of the attendant support platform 22 and attendant support platform frame 59 telescopically sliding into the tubular beam HB above the lower frame 11 of the assembly 10. The horizontal upper safety railings 30 hingedly fold sideways, parallel to the floor surface, using hinges 73 and 74 into a position adjacent and abutting the upper frame 12. The protruding end of the safety railing 75 telescopes within safety railing 30 so as to be flush with the width of the assembly. In yet another configuration of an alternate embodiment shown in Figures 7Dl and 7D2, the safety railings 30 do not make contact with the lower attendant support platform frames 57 and 59, and the safety railing 30 telescopes into the upper frame 12 of the assembly 10 while the attendant support platforms 20 and 22 (shown in phantom) hinge and fold up against the first end 23 and first elongated side 27, and the attendant support platform frame portions 57 and 59 telescope within separate tubular frame portions HA and HB situated above HB and below HA the lower frame 11 of the assembly 10. The standing surfaces of the attendant support platforms 20 and 22 in this embodiment are shown in phantom in planar lateral abutment in Figure 7D2 as folded up against the assembly 10 in storage mode. While the embodiment in Figures 7Dl and 7D2 is shown with a safety railing 30 that has no vertical members, this configuration can also be constructed with a safety railing that has a vertical member 30a as shown in Figures 7D3 and 7D4. In Figure 7El the safety railings and attendant support platforms are constructed and attached to the assembly 10 so they can be detached from the assembly 10 for storage purposes. Releasable mechanisms are used to hold the safety railings 30 and ' attendant support platforms 20 and 22 in place while in use, and to facilitate easy removal. While Figure 7El •illustrates one method of attaching and removing the attendant support platforms 20 and 22 and safety railings 30, many other methods can be utilized for this purpose While the methods shown in the Figure 7 series and ■discussed above are the preferred methods for disposing the attendant support platforms 20 and 22 and safety railings 30 to save space for storage of the assembly, any means of folding, hinging, telescoping, retracting or removal can be employed for this purpose.1 Figures 8A and 8B show alternate embodiments where the assembly has two first end 23 preferably rotatable wheels 44 ■ and only one at the second end 25 preferably swivelable- wheel 49-. ' Vertical stability of the assembly is critical to safe operation and use. Therefore, in addition to or in place of constructing the assembly 10 to be stable, other methods for supporting or offsetting the weight of the attendants and enhancing vertical stability of the assembly can be added to the attendant support platforms or built into the assembly. The following figures 9 and 10 series illustrate methods for accomplishing this objective. In Figure 9, one or more swivel wheels and supports assemblies 35 can be added to the bottom of the attendant support platforms 20 and 22 for weight and balance reinforcement to support the weight of the attendants and provide vertical stability for the assembly. These swivel wheels can be fixed as shown in Figure 9, or in embodiments where the attendant support platforms telescope or fold, a spring-like, friction-engaged button 39 and corresponding opening 38 on the wheel bracket 37 activates both the retraction and downward in-use placement position of the swivel wheel 36 as shown in Figure 9A. This spring-actuated friction button is well-known in the art, operates easily for manual activation, and is a simplified, space-saving construction. While swivel wheel assemblies 35 are the preferred means for placing under the attendant support platforms 20 and 22 for providing weight reinforcement and enhancing the stability, any means that will move freely across the floor surface while supporting the attendant support platforms 20 and 22, including castors or skid pads can be utilized for this purpose. Another method to offset the weight of the attendants and enhance vertical stability is to employ one or more counter weights 90 as shown in Figures 1OA (side view) and 1OB (bottom view) . Ideally, these counter weights should be constructed of lead, iron or steel, although any other heavy metal or material such as concrete can be used. They can be attached or built into the lower frame or other parts of the assembly in strategically placed locations where they will help to offset the weight of the attendant (s) standing on the attendant support platforms 20 and 22. In the alternate embodiments in which the attendant support platforms and safety railings collapse, fold, telescope or otherwise retract, the vertical support railings can also collapse or fold so that the upper and lower frames can be brought together in a manner like or similar to an ambulatory stretcher used in ambulances where the upper frame and patient support surface can be raised or lowered from the lower frame. Figures HA and HB show a variation of the invention so constructed. Figures HC and HD show a different method for collapsing the structure. In the variation shown in Figure 9, swivel wheels have been employed underneath the attendant support platforms 20 and 22 for stability; however, other methods as discussed throughout can be employed for this purpose. While attendant support platforms like those shown as 20 and 22 throughout the figures and safety railings like those shown as 30 throughout the figures are the preferred method for supporting the attendants and preventing them from falling, other means can also be utilized for this purpose. Figure 12 shows two such means. Along the first side 27, an attendant support platform 20 with built-in footholds 95 that is just large enough to accommodate one attendants feet is attached to the lower frame 11. A safety rail 30 protrudes from the upper frame and is connected to the attendant support platform 20.by a vertical member 30b, ' which can also be located at the outboard corner shown as 30c in phantom. The attendant support platform 20 and safety railing 30 can be fixed in a stationary position so the attendant can stand adjacent to the patients upper torso (in- which case the vertical member 30b can be eliminated) , or they can slide back and forth along the upper frame 12 and lower frame 11. Various means for sliding a part along a ■ horizontal member are well known in the art and need not be discussed in detail here. When such sliding means are employed, means ■ for preventing the attendant support platform 20 and/or footholds 95 and safety railing 30 from moving while in use need to be employed. Such means are also well known in the art and need, not be discussed further, here. In other configurations not shown here, footholds 95 alone, can be utilized' in- place of the' attendant' support platform 20 with integrated footholds 95, or a small attendant support platform 20 without footholds 95 can be utilized as well. In other configurations the vertical member 30b connecting the safety railing 30 and attendant support platform 20 or footholds 95 can be eliminated so the two slide along the upper frame 12 and lower frame 11 independently. Also shown in Figure 12 at the first end 23 of the assembly 10 is a different means of supporting and securing the attendant. A small attendant support platform 22 is attached to the lower frame. This attendant support platform 22 has raised edges around the three outboard sides to prevent the attendants feet from moving beyond the edge, thereby preventing the attendants feet from coming off the attendant support platform while the assembly is in use. A strap or metal restraint 96 takes the place of a safety railing and is fixed to one point on the upper frame 12, and can be clipped or otherwise attached to another point on the upper framel2. The attendant can then step onto the attendant support platform 22, wrap the restraint 96 around his or her body, and attach it to the upper frame 12. Like the safety railings 30 shown throughout, the restraint 96 is used to provide a point of balance for the attendant and keep the attendant from falling off the assembly 10 while it is in use. This restraint 96 can take various forms, including that of a harness, belt, strap or other means of restraint, all of which can be used to keep the attendant from falling. Referring to the preferred embodiment in Figure 3, in the practice of this invention, when an emergency condition arises which necessitates a patient being quickly stabilized and simultaneously moved to an area of treatment, as in moving an arrested patient to surgery while simμltaneously performing CPR, the patient 60 is placed on the horizontal patient support deck 17 or patient support surface 18 of the assembly 10 while one or more medical attendants 65 stand on the attendant support platforms 20 and 22 disposed in a position for rendering emergency treatment. Such emergency treatment, e.g., bagging, inserting of IV lines, administering CPR can be performed by the attendant (s) 65 standing on the attendant support platform(s) 20 and 22 and the patient 60 can be moved simultaneously and without interruption of emergency and potentially life-saving treatment, while being wheeled by one or more other attendants (not. standing on a platform and not shown in the drawings) to the desired area of treatment such as an operating room. Upon arrival, the patient 60 can be treated on the assembly 10, but in most instances will be removed from the assembly 10 and placed on an appropriate surface like an operating table for continued emergency treatment. For example, with the instant invention, patients that could not otherwise be moved at the time, (e.g., a situation in which emergency treatment cannot be stopped for more than a few seconds such as with a patient in cardiac arrest, or severe trauma) , can be taken to the desired area of treatment without undue delay and simultaneous with the administration of CPR or other potentially life' saving emergency treatment. In addition to the benefits to the patient 60, the attendants 65 treating the patient 60 during this wheeling need not be concerned with running alongside the assembly, nor with avoiding or encountering floor or hallway obstacles, nor are the attendants exposed to great risk of falling from or slipping .on the platforms on which they stand due to the existence of the safety railings 30, and the attendants can continue to render treatment (such as CPR) which could not be continued if the attendants had to run alongside the patient as on conventional stretchers. Accordingly, an attendant 65 standing at the head or alongside of the patient 60 will be able to devote substantially his or her entire attention to treating the patient 60 while one or more other attendants need only be concerned with quickly pushing, pulling and steering the assembly 10 to the appropriate area of treatment. The patient 65 is treated during transport rather than prior to transport to the ultimate treatment destination, (e.g., operating room) , saving valuable and potentially life-saving minutes in the process. In addition, in a number of variations, the attendant support platforms and safety railings may be retracted by various means to be stored when not in use, thereby saving space. A number of desirable features can be added, for example a traction surface 54 on the upper surface of the attendant support platforms to help prevent slippage of the attendants, padding 55 to provide comfort for the attendants, guard rails 56 to prevent the patients arms from falling off the patient support deck 17 or patient support surface 18 thereby preventing the patients arms from interfering with the attendant. Additional features like mechanisms for adjusting the height of the upper frame 12, patient support deck 17 and patient support surface 18 can be added as shown in Figures IG and 4C can be built into the assembly, and steering handles 97 and IV poles 98 can be added as shown in Figure 4C. The instant invention can be constructed with any number or combinations of 'features and configurations as discussed herein. The instant invention has been shown and described herein in what is considered to be the most practical and preferred embodiments, with configurations and features that are believed to be useful. It is recognized, however, that departures may be made therefrom within the scope of the invention and that obvious modifications will occur .to a person skilled in the art .