Technical Field

The invention is related to syringes.

In particular, the invention relates to an adjustable-dosage syringe used in the medical sector, which enables the injecting amount of the medicine to be adjusted by healthcare personnel through dosage control in medicines where the injection amount is sensitive, and thus, eliminates operator errors in the cases where sensitive medicines are used.

Prior Art

Syringes are mechanisms that generally consist of a tube and a plunger that moves inside the tube, and are used in the treatment processes of patients in the medical sector by completing their functions with a needle attached to the tube end. The basis of the working principle of syringes is the force and the relationship with the force direction. Healthcare providers benefit from the vacuum effect by creating negative pressure during taking blood from the patient or drawing medication into the syringe, and positive pressure is created during the injection of medicine into the patient and the medicine is ensured to leave the tube by means of the needle.

In the current art, syringes that traditionally comprising a graduated scale and a plunger are used. While the medicine is injected into the patient, the amount of injection is followed through the capillary lines called the medicine dosage graduation region. This situation not only is not ergonomic, but also makes it difficult to follow the dosage and leads to the fact that the treatments for the cases result in errors to a large extent. This situation poses a great problem for patient health, especially in medicines where dosage sensitivity is important. Therefore, there are problems in the use of medicines that require precision in dosage adjustment with existing syringes, and as a result, operator accidents, even in successful operations, negatively affect the course of the case. In addition to this, injecting more or less than the desired dosage into the body of patient while injecting medicines into the body of patient causes permanent and temporary problems in cases, resulting in the inability to complete the treatment.

In the prior art art, there are basically 50 dosage adjustment lines in 0.5 ml medical syringes. 10 of them constitute the main dosage adjustment lines. There is a high probability that the healthcare personnel will make a mistake while injecting medicine into the patient. The injection site often prevents the operator from reading the dosage lines. In addition, the hand sensitivity of operator may not be suitable for injecting the desired dosage of medicine. Furthermore, the syringes that reach the hands of the healthcare personnel with a certain amount of medicine are visually controlled by the operator during the process of removing the air from the syringe. This situation paves the way for medicine wastage, which is an undesirable situation. Therefore, in the state of the art, there is a need for a syringe structure that allows the injection amount of the medicine to be adjusted with the required precision.

As a result, the existence of the aforementioned problems and the inadequacy of the existing solutions necessitated an improvement in the relevant technical field.

Purpose of the Invention

The present invention relates to the adjustable-dosage syringe, which eliminates the disadvantages mentioned above and brings new advantages to the related technical field.

The main purpose of the invention is to provide an adjustable-dosage syringe that allows the amount of medicine to be injected to the patient to be adjusted by healthcare professionals by providing dosage control for medicines where the injection amount is very sensitive (which can be as low as 0.05 ml).

The purpose of the invention is to provide an adjustable-dosage syringe that makes a gradual stop and enables the determination of the medicine to be injected with the step of determining the desired dosage at the desired level and eliminating operator errors, especially in cases where sensitive medicines are used.

Another purpose of the invention is to provide an adjustable-dosage syringe that enables the operator to be aware of her/his mistake and thus to easily reduce the error rate, thanks to the fact that the level selected by the operator can be controlled before the medicine is injected in the present art, unlike standard syringes with a conventional structure.

Another purpose of the invention is to provide an adjustable-dosage syringe that also prevents medicine wastage, which is an undesirable situation, by adjusting the plunger destination point according to the first step during the process of taking the air of the syringe, thanks to the adjustable stages in the syringes that reach the healthcare personnel with the medicine.

Another purpose of the invention is to provide an adjustable-dosage syringe that enables operators to overcome the risk of underdosing or overdosing the patient thanks to its mechanical locking and controllability features,

Another purpose of the invention is to provide an adjustable-dosage syringe that eliminates the need for the healthcare provider to check the dosage during the administration of the dosage. Thus, it will be possible for the healthcare provider to give her/his full attention to the patient.

Another purpose of the invention is to provide an adjustable-dosage syringe that can be administered with a single pre-limited movement and likewise eliminates the need for visual control by performing the deaeration process of the syringe, constituting the first step, with a single movement.

Another purpose of the invention is to provide an adjustable-dosage syringe that can be used pre-filled with medicine and does not interact with the medicine, preferably with a glass syringe and preferably with a Teflon-coated gasket.

Another purpose of the invention is to provide an adjustable-dosage syringe that provides preliminary dosage check in applications where the medicine is pre-filled or filled during the process.

In order to fulfil all the purposes stated above and which can be understood from the detailed description, this invention is an adjustable-dosage syringe that allows dosage control and adjustment of the injection amount of the medicine in medicines used in the medical sector and where the injection amount is sensitive and that eliminates operators’ errors in cases for which sensitive medicines are applied. Moreover, this invention is related to: the cylinder that preserves the medicine, the plunger that provides the injection of medicine by moving linearly in the cylinder and prevents the injection of a high dose of medicine to the patient by gradually locking the position when the dosage level selected before the injection of the medicine is reached, the gasket located at the plunger end and providing sealing by transferring the pressure applied to the plunger into the cylinder, the dosage adjustment bush, which rotates on the plunger and ensures locking of the plunger and adjusting the desired dosage of medicine to be injected, the male main body part and female main body part, which interlock each other in connection with the outside of the dosage adjustment bush and lock the dosage adjustment bush from the outside at each stage transition.

The structural and characteristic features of the invention and all its advantages will be understood more clearly thanks to the figures provided below and the detailed explanations given by reference to these figures. For this reason, the evaluation should be made by taking these figures and detailed explanations into account.

Figures to Help Understanding of the Invention

Figure 1: The disassembled view of the adjustable-dosage syringe that is the subject of the invention.

Figure 2: It is the view of the plunger of the adjustable-dosage syringe that is the subject of the invention.

Figure 3: It is the cross-sectional view of the adjustable-dosage syringe that is the subject of the invention.

Figure 4: It is the view of the dosage adjustment bush of the adjustable-dosage syringe that is the subject of the invention.

Figure 5: It is the cross-sectional view of the dosage adjustment bush of the adjustable-dosage syringe that is the subject of the invention.

Figure 6: It is the view of the protrusion on the plunger of the adjustable-dosage syringe, which is the subject of the invention, positioned on the locking step. Figure 7: It is the view of the protrusion on the plunger of the adjustable-dosage syringe, which is the subject of the invention, positioned at the air expelling step. Figure 8: It is the disassembled view of the male main body and female main body of the adjustable-dosage syringe that is the subject of the invention.

Figure 9: It is another view of the disassembled form of the male main body and female main body of the adjustable-dosage syringe that is the subject of the invention.

Figure 10: It is the view of the male main body of the adjustable-dosage syringe that is the subject of the invention.

Figure 11: It is the assembled view of the male main body and female main body of the adjustable-dosage syringe that is the subject of the invention.

Description of Part References

10. Cylinder

20. Plunger

21. Protrusion

30. Gasket

40. Dosage adjustment bush

41. Position adjustment step

411. Locking step

412. Deaeration step

413. Dose step

42. Housing

43. Knurled structure

50. Male main body

51. Male protrusion

52. Extension

60. Female main body

61. Extension slot

70. Main body window

Detailed Description of the Invention In this detailed description, preferred alternatives to the adjustable-dosage syringe, which is the subject of the invention, are explained only for a better understanding of the subject and without producing any limiting effect.

In Figure 1 , the disassembled view of the adjustable-dosage syringe, which is the subject of the invention, is given. Accordingly, the adjustable-dosage syringe basically comprises the cylinder (10) that contains the medicine, the plunger (20) that provides the injection of medicine by moving linearly in the cylinder (10) and prevents the injection of high doses of medicine by locking the position gradually when the selected dosage level is reached before the medicine is injected into the patient, the gasket (30) located at the plunger (20) end and providing sealing by transferring the pressure applied to the plunger (20) into the cylinder (10), the dosage adjustment bush (40), which rotates on the plunger (20), locking the plunger (20) and adjusting the dose of the medicine to be injected into the patient, male main body (50) and female main body (60) that interlock each other by fastening to the outside of the dosage adjustment bush (40) and lock the dosage adjustment bush (40) from the outside at each stage transition and the main body window (70) that is located on the male main body (50) and female main body (60) and allows the level of the dosage adjustment bush (40) to be seen from the outside.

The cylinder (10), which forms the main structure of the adjustable-dosage syringe, which is the subject of the invention, is the part that stores the medicine and is preferably made of glass. Thanks to the fact that the cylinder (10) is made of glass, it is prevented from reacting with the medicine. It is ensured that the friction generated due to the force applied to the plunger (20) moving linearly in the cylinder (10) and the gasket (30) at the plunger (20) end during injection is reduced. In preferred embodiments of the invention, the cylinder (10) is made of plastic material that does not interact with the medicine.

The plunger (20), which enables the medicine to be injected into the patient by moving linearly in the cylinder (10), transmits the force applied by the operator to the gasket (30) for the injection of the medicine. As seen in Figure 2, a protrusion (21) is formed on the plunger (20), which enables the cylinder (10) to lock its position gradually when the dosage level selected before the medicine is injected into the patient. Thus, the patient is prevented from injecting higher doses of medicines than desired. The geometry of the circular base located on the underside of the plunger (20) should be ergonomic for the operator and should not cause any difficulties to the operator during the operation. The size of the operator's hands and fingers should not cause any problems while pushing the plunger (20). This is taken into account in the adjustable-dosage syringe, which is the subject of the invention.

A gasket (30), which is preferably Teflon coated and which provides sealing by transferring the pressure applied to the plunger (20) into the cylinder (10) is equipped at the plunger (20) end. Thanks to the Teflon coating of the gasket (30), the friction that the gasket (30) is exposed to in the cylinder (10) is minimized and chemical reaction of the gasket (30) with the medicine is prevented. In preferred embodiments of the invention, the gasket (30) has a coating which does not react with the medicine, reduces the friction generated and does not require an additional lubricant.

A dosage adjustment bush (40) is attached to the plunger (20), as seen in Figure 3, in order to lock the plunger (20) and adjust the desired dosage of medicine to be injected into the patient. As seen in Figures 4 and 5, on the inner surface of the said dosage adjustment bush (40), there are position adjustment steps (41) where the protrusion (21), which ensures the gradual locking of the plunger (20) position when the dosage level of the cylinder (10) selected before the injection of the medicine is reached, is placed. These position adjustment steps (41) have a proportionally rising structure and are arranged as locking step (411), deaeration step (412) and dosage step (413), respectively. It is possible to increase the number of position adjustment steps (41) according to the desired dosage and sensitivity. In addition, these positioning steps (41) are numbered on the outer surface of the dosage adjustment bush (40). The dosage adjustment bush (40) ensures that the dosage to be injected can be adjusted before starting the injection procedure. During the injection process, the plunger (20) automatically stops when it reaches the selected dosage.

Figure 6 shows the protrusion (21) on the plunger (20) positioned on the locking step (411). Figure 7 shows the protrusion (21) on the plunger (20) positioned at the deaeration step (412).

Thanks to the position adjustment steps (41), the dosage adjustment bush (40) does not move even if force is applied to it when the plunger (20) is in the locking step (411), that is, in the fully locked position (first position). This prevents the operator from starting the injection process without selecting a dose. Thus, medicine losses caused by such operator errors are prevented. The deaeration process in the second step provided by the deaeration step (412) facilitates the operation of the operator by removing the air expelling in the cylinder (10). With this arrangement, with the upward movement of the plunger (20), all the dosage-adjusted medicine is injected into the patient from the adjustable-dosage syringe by means of the dosage (413) step, which constitutes the last step.

As can be seen in Figures 8 and 9, there are the male main body (50) and the female main body (60) that interlock each other by fastening to the outside of the dosage adjustment bush (40). Thanks to the male main body (50) and the female main body (60), a uniform structure and a compact appearance are obtained in the adjustable-dosage syringe. There are extensions (52) on the male main body (50) and extension slots (61) on the female main body (60) which are suitable for the form of these extensions (52). The male main body (50) and the female main body (60) are fixed by interlocking by means of the aforementioned extensions (52) passing into the extension slots (61). The male main body (50) and the female main body (60) lock the dosage adjustment bush (40) from the outside at each step transition. Accordingly, a male protrusion (51) is equipped inside the male main body (50), as seen in Figure 10. The said male protrusion (51) is positioned in the slots (42) on the dosage adjustment bush (40) and locks the dosage adjustment bush (40) at each step transition in the position adjustment steps (41). Thus, the position of the selected medicine dose is prevented from changing.

The dosage adjustment bush (40) rotates on the plunger (20). In order to allow the dosage adjustment bush (40) to be rotated by the operator, a knurled structure (43), which protrudes from the edge of the male main body (50) and female main body (60), as seen in Figure 11 , is formed around the outer surface. While adjusting the step of the plunger (20) by the position adjustment steps (41), the knurled structure (43) is rotated. Due the fact that the knurled structure (43) has a geometry that can be easily intervened is of great importance for the ergonomics of the syringe, which is the subject of the invention.

As seen in Figure 11 , there is a main body window (70) on the male main body (50) and female main body (60), which allows the level of the dosage adjustment bush (40) to be seen from the outside. It is ensured that operator errors are prevented to a great extent by the fact that the operator both can read the dosage adjustments from the main body window and can physically feel the dosage adjustments while turning the dosage adjustment bush (40) with the knurled structure (43). In addition to these, the slots (42) located on the dosage adjustment bush (40) and the male protrusion (52) located in the male main body (50) are clamped together, thereby stopping the rotation of the dosage adjustment bush (40) by mechanically suppressing it. Thus, when the operator brings the dosage of the medicine to the desired level, the adjustable-dosage syringe can remain stable.