Summary:

The invention relates to creating an alternative solution that has not been exist before.

20 ACH isolation system is converting any room to an isolation room by creating an independent and portable air isolation system with all the engineering control features required to keep the air change per hour higher than or equal to 12 and converting the air pressure to a negative pressure less than or equal to -2.5 Pa.

When the system is stopped after 90 seconds the room returns to its normal state before operation, so it can be used for non-infectious patients after disinfection.

The advantage of the system is its cost effective, which can reach up to a sixth (%) of the cost compared to the cost of establishing an isolation room for airborne diseases using the usual methods

This system is characterized by its efficiency in saving time, as it takes a few hours for installation and operation while it takes more than a week to establish an isolation room for airborne diseases with negative pressure by regular methods.

System components (Figure 1-A)

1- System body with wheels

2- Hard Work Exhaust Fan

3- Sound Alternator

4- Fiber Glass insulation

5- Fan Speed Controller

6- HEPA filter

7- Aluminum Pre- filter

8- Motorize Volume Dampers with Control Circuit

9- UV sterilization lamp (optional) Background

The invention relates to preventing the infection transmission among healthcare workers, patients and visitors while a patient is infected by Co vid- 19 or any airborne or droplet infectious disease.

Achievement in addressing patient safety during COVID- 19 pandemic especially in lifesaving is one of the patient safety topics that should be taken into consideration to prevent further infectious disease transmission where there will be a high possibility of performing an aerosol generating procedures during the stay which will pose a risk of exposure among healthcare worker and other patients at hospital. Converting a room to a negative pressure room is expensive and time consuming

Our approach is to find an alternative cost saving solution that could be apply in a timely manner in converting any room temporary or permanent to a negative pressure isolation room by creating a standalone 20 ACH Isolation System with all features of environmental engineering control required to maintain an ACH >12, and converting the pressure to less than -2.5 Pa according to national and international requirements for isolation rooms for airborne infections (Centers for Disease Control and Prevention (CDC) - Saudi central board for accreditation of healthcare institutions (CBAHI).

During CO VID- 19 pandemic, hospitals are facing a challenge in containing airborne infectious cases during staying of suspected or confirmed cases. Therefore hospital preparedness for emergencies such as emerging airborne infectious diseases requires strategic planning to ensure that all components of respiratory protection measures, including environmental controls, are in place for airborne infection isolation rooms (AIIRs). Hospital have insufficient facilities to provide airborne infection isolation for large numbers of patients with airborne infectious diseases presenting in a short time period.

Without adequate environmental controls, patients with airborne infectious diseases will pose a risk to other patients and health care workers.

In hospital, infection control plays a very important role in minimizing the transmission of microorganisms from a patient to a susceptible host; the airborne transmission of pathogen is of a great concern as this type of transmission occurs through dispersion of infectious airborne droplet nuclei. Small-particle residues (5 pm or smaller in size) of evaporated and concentrated droplets (known as droplet nuclei) containing microorganisms, remain suspended in the air for long periods of time and can be dispersed by air currents within the patient room or travel over long distance assisted by mechanical ventilation.

During CO VID- 19 pandemic, emergency room is facing a challenge in containing airborne infectious pathogen during resuscitation of suspected or confirmed cases. Therefore hospital preparedness for emergencies such as emerging airborne infectious diseases requires strategic planning to ensure that all components of respiratory protection measures, including environmental controls, are in place for airborne infection isolation rooms (AIIRs). Hospital have insufficient facilities to provide airborne infection isolation for large numbers of patients with airborne infectious diseases presenting in a short time period.

Without adequate environmental controls, patients with airborne infectious diseases will pose a risk to other patients and health care workers.

General description of the invention

The system can be used in healthcare facilities in different departments such as inpatient rooms or in waiting areas as an optional solution in converting any room in a short period of time less than a few minutes to accommodate high waves of airborne infection patients when there are difficulties in the facility's infrastructure and insufficient Existing isolation rooms.

The system can be moved easily, and the system can be pulled over 2000 cubic feet per minute without noise or vibration, which is not available in the market, so it can be used in large places such as the dialysis unit, dental clinics or outpatient clinics, and it can also be used in waiting areas, meeting rooms, conference rooms, transportation, restaurants, banquet and celebration halls, classrooms and other various areas. And also it can be used as a portable air purifier to purify the air without negative pressure.

The system is characterized by its feasibility in terms of cost, which may reach one sixth ( e) of the cost compared to the cost of establishing an airborne infectious diseases isolation room with negative pressure by conventional methods.

On the other hand, this system is characterized by its efficiency in saving time, as it takes installation and operation within a few hours, while it takes more than a week to establish an isolation room by normal methods.

It can also be used in facilities with poor ventilation as a portable air purifier to purify the air, improve indoor air quality and reduce the chances of infection transmission, especially in gathering places.

It is an independent insulation system that contains all the features of engineering control required to maintain the number of times of air change higher or equal to 12, and it can convert the room air pressure into a negative pressure less than or equal to (-2.5 Pa) with minimal noise, without changing in room constructions and without loss of the characteristics of the current ventilation system (ventilation ducts, air valves, air distributors, ...) BRIEF DESCRIPTION OF THE DRAWINGS:

Figure (1- A) System components

Figure (1- b) System body with wheels

Figure (1-C) Sound Alternator

Figure (1-d) Fiber Glass insulation

Figure (1-E) fan speed controller

Figure (1-F) HEPA filter

Figure (1- G) aluminum pre-filter

Figure (1-H) motorize volume dampers

Figure (1- 1) Hard Work Exhaust Fan

Figure (1- J) UV sterilization lamp

Figure (2- A) Sequence of Operation

Figure (2 - B) Control Circuit

Figure (3- A) System Real Picture

Table (1) Air change per hour measurements comparison between before and after installation

Certificate (1) Certificate of Appreciation from the International Medical Center in Jeddah

Certificate (2) Certificate from accredited environmental services center for noise measurements.

Certificate (3) Certificate from accredited environmental services center for vibration measurements.

Certificate (4) Certificate from accredited environmental services center for air change per hour measurements.

Certificate (5) Certificate from accredited biomedical devices services center for air measurements. Detailed Description:

The device can be installed in any room by installing a valve (No. 2) on the main suction line of the room to control the flow of air drawn from the main exhaust of the room and a valve (No. 1) on the intake line coming from the device to control the flow of air drawn from the room by the system. Figure (2- a)

Once the system is running, the valve (No. 2) will be closed and the valve (No. 1) will be opened within 90 seconds by means of the circuit shown in Figure (2- B) so that the rate of the air flow drawn by the system is adjusted to be higher than the air flow coming from the air handling unit. By 30% .. by means of a switch to adjust the fan speed (Figure 1-E)

Once the system is turned off, the valve (No. 2) will be opened and the valve will be closed (No. 1). The room will return within 90 seconds to its normal state before operation so that the room can be used for non-infectious patients after it has been disinfected.

By calculating the room size (length x width x height), we can adjust the air flow rate in cubic feet per minute (CFM) drawn by the system to be 30% higher than the rate of air flow entering the room and coming from the air handling unit, and the purpose is to reach higher The number of times of air change per hour in the room so that it reaches more than 12 times per hour with a negative pressure less than -2.5 Pa, as the number of times of air change per hour in the isolation room = 60 X the rate of air flow drawn from the room in cubic feet per minute divided Based on the room size in cubic feet, according to the national and international requirements and standards for isolation rooms.

The towing is done by a high-capacity fan above 1000 cubic feet per minute, and the noise generated by it is controlled by installing a mechanical noise suppressant, and the body of the device is wrapped from the inside with a multi-layer black fiberglass sound insulation and also to prevent vibration. Corrosion resistant and used in the manufacture of medical devices in hospital operating rooms.