Cross lever labor-saving contrast agent injector

Abstract

The utility model relates to a cross lever labor-saving contrast agent injector, which belongs to the technical field of medical instruments for injection of contrast agents, comprises an injector cartridge case with symmetrical double rings and an injector piston rod, and is characterized by further comprising a first pressing rod and a second pressing rod which are identical in structure, a first support is arranged at the tail end of the injector piston rod, and a second support is arranged at the tail end of the injector piston rod. The first pressing rod and the second pressing rod intersect with each other and are coaxially hinged to the first support, a second support is arranged at an injection port of the syringe cartridge, and the first pressing rod and the second pressing rod are hinged to the second support through a first connecting rod and a second connecting rod respectively. The contrast agent injector has the advantages that the force exerting action of medical staff when the medical staff injects a contrast agent is optimized, the working intensity of the medical staff is effectively reduced, and the injury of the contrast agent injector to the hands of the medical staff is reduced. Therefore, the contrast agent can be continuously injected into the blood vessel of a patient at a stable flow, and the contrast examination is clear and reliable.

Description

Technical Field

[0001] The utility model relates to a cross-lever labor-saving contrast agent syringe, belonging to the technical field of medical devices for contrast agent injection. Background Art

[0002] Contrast agent syringes are medical devices that must be used in medical contrast examinations. Currently, there are two main categories of widely used contrast agent syringes, namely: manual contrast agent syringes (abbreviated as three-ring syringes) and electronic high-pressure contrast agent syringes.

[0003] Due to the high procurement cost of electronic high-pressure contrast agent syringes and the reason of increasing patients' medical expenses, manual contrast agent syringes are commonly used in major hospitals at present.

[0004] During the use of manual contrast agent syringes, due to the high viscosity and poor fluidity of the contrast agent, a great deal of force is required to complete the extraction and injection of the contrast agent. Especially when injecting the contrast agent, in order to ensure the contrast examination effect, the contrast agent entering the blood vessel must maintain a stable flow rate and velocity, which requires a stable and continuous thrust acting on the piston rod end ring of the manual contrast agent syringe. This places relatively high requirements on the finger and hand thenar muscle strength of medical staff, and long-term injection will cause finger fatigue of medical staff and even cause damage to finger muscles and skin.

[0005] When the currently used manual contrast agent syringe injects the contrast agent, medical staff need to use the middle fingers or index fingers of both hands to hook the double rings on both sides of the contrast agent syringe cartridge, and then use the thumbs of both hands to tightly press the piston rod end ring of the contrast agent syringe to push the contrast agent into the blood vessel. Due to the structural characteristics of the current manual contrast agent syringe, when medical staff use the manual contrast agent syringe, they can only use finger muscles and palm thenar muscles to complete such operation actions, and other muscle groups of the upper limb cannot effectively participate in the work, resulting in the problem of difficult injection. Summary of the Invention

[0006] The purpose of the utility model is to provide a cross-lever labor-saving contrast agent syringe which aims to optimize the force application action of medical staff when injecting the contrast agent, effectively reduce the operation intensity of medical staff, and reduce the damage of the contrast agent syringe to the hands of medical staff.

[0007] The utility model is realized by the following technical solutions:

[0008] The utility model includes a syringe cartridge with symmetric double finger rings and a syringe piston rod. It is characterized in that it further includes a first pressing rod and a second pressing rod with the same structure. At the tail end of the syringe piston rod, there is a first support. The first pressing rod and the second pressing rod intersect and are coaxially hinged to the first support. At the injection port of the syringe cartridge, there is a second support. The first pressing rod and the second pressing rod are respectively hinged to the second support through a first connecting rod and a second connecting rod.

[0009] The first pressing rod and the second pressing rod are long rods with a curved arc.

[0010] The power arms of the first pressing rod and the second pressing rod are arc-shaped arms, and hand-pressing arc grooves are provided at the ends.

[0011] The resistance arms of the first pressing rod and the second pressing rod are straight arms.

[0012] The lengths of the power arms of the first pressing rod and the second pressing rod are greater than the lengths of the resistance arms.

[0013] The cross-section of the first support is an isosceles triangle.

[0014] The hinged position where the first pressing rod and the second pressing rod intersect and are coaxially hinged to the first support is located at the symmetric center of the upper part of the first support.

[0015] The outer contour of the second support is square.

[0016] The resistance arm ends of the first pressing rod and the second pressing rod are respectively hinged to the first connecting rod and the second connecting rod.

[0017] The first connecting rod and the second connecting rod are respectively hinged to both sides of the second support.

[0018] The advantages of the utility model are as follows: the manufacturing cost is low, the production process is simple, the requirements for materials are not high, and the operation is simple and easy to learn, convenient and flexible. Without significantly increasing the cost, the working efficiency of the imaging examination work is effectively improved. Due to the adoption of the principle of the labor-saving lever, the pressure required to push the syringe piston is reduced. And by using the structural characteristics of the double-cross lever, the force application actions of medical staff during the injection of the contrast agent are optimized, effectively reducing the working intensity of medical staff and reducing the damage of the contrast agent syringe to the hands of medical staff. Thus, it is ensured that the contrast agent can be continuously injected into the patient's blood vessel at a stable flow rate, and further ensuring the clarity and reliability of the imaging examination. Brief Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the utility model;

[0020] Figure 2 is a schematic diagram of the action of drawing the contrast agent of the utility model;

[0021] Figure 3This is a schematic diagram of the operation of injecting contrast agent for the present utility model.

[0022] In the figure: 1 - syringe barrel; 2 - finger ring; 3 - syringe piston rod; 4 - first connecting rod; 5 - first pressing rod; 6 - second pressing rod; 7 - hand - pressing arc groove; 8 - cross - positioning shaft; 9 - first hinge shaft; 10 - first support; 11 - third hinge shaft; 12 - second hinge shaft; 13 - second connecting rod; 14 - fourth hinge shaft; 15 - second support; 16 - guiding and limiting groove. Specific implementation manner Embodiment

[0023] Refer to the appendix Figure 1 The present utility model includes: a syringe barrel 1 with symmetric double finger rings 2, a syringe piston rod 3, and also includes a first pressing rod 5 and a second pressing rod 6 with the same structure. The first pressing rod 5 and the second pressing rod 6 are long rods with a curved arc, and are both composed of a power arm and a resistance arm integrated with the power arm. A positioning shaft hole is opened at the connection position of the power arm and the resistance arm. The power arm is an arc - shaped arm, and a hand - pressing arc groove 7 is provided at the end. The resistance arm is a straight arm. The length of the power arm is greater than the length of the resistance arm, forming a moment difference and constituting a labor - saving lever structure. At the tail end of the syringe piston rod 3, a first support 10 is provided. The cross - section of the first support 10 is an isosceles triangle. A guiding and limiting groove 16 is longitudinally opened at the top of the first support 10, and a first support positioning shaft hole is transversely opened at the top of the first support 10. The first pressing rod 5 and the second pressing rod 6 cross and pass through the guiding and limiting groove 16, and are fixed by the cross - positioning shaft 8 passing through the first support positioning shaft hole and the positioning shaft holes of the first pressing rod 5 and the second pressing rod 6, so that the first pressing rod 5 and the second pressing rod 6 form a coaxial hinge with the first support 10. A second support 15 is provided at the injection port of the syringe barrel 1. The outer contour of the second support 15 is square. The resistance - arm ends of the first pressing rod 5 and the second pressing rod 6 are respectively hinged to one end of the first connecting rod 4 and the second connecting rod 13 through the first hinge shaft 9 and the second hinge shaft 12, and the other ends of the first connecting rod 4 and the second connecting rod 13 are respectively hinged to both sides of the second support through the third hinge shaft 11 and the fourth hinge shaft 14.

[0024] Refer to the appendix Figure 2 、 3 The using method of the cross - lever labor - saving contrast agent syringe of the present utility model is as follows:

[0025] The first method of injecting contrast agent:

[0026] When injecting the contrast agent, medical staff use the middle fingers or index fingers of their left and right hands to hook the left and right rings 2 on the syringe barrel respectively, and then use the thumbs of their left and right hands to press the heads of the first pressing rod 5 and the second pressing rod 6 in the open state respectively. By using the strength of the fingers and the thenar muscles, press the two pressing rods down simultaneously to start the contrast agent injection action. With the help of the labor-saving lever structure, the syringe piston can be easily and stably pushed to move, and the contrast agent can be continuously and stably injected into the patient's blood vessel.

[0027] The second method of injecting the contrast agent:

[0028] When injecting the contrast agent, medical staff use the middle fingers or index fingers of their left and right hands to hook the left and right rings 2 on the syringe barrel respectively, then turn their palms downwards, bring the thumbs of both hands closer, and place the thenars of both hands in the middle position between the two pressing rods in the open state. Use the strength of the wrists and forearms of both hands to press the first pressing rod 5 and the second pressing rod 6 down simultaneously to complete the injection action more labor-saving.

[0029] The operation method of extracting the contrast agent:

[0030] When extracting the contrast agent, medical staff use the index finger and middle finger of one hand to hook the two rings 2 on the syringe barrel of the syringe simultaneously, and the thumb and middle finger of the other hand are respectively buckled in the hand-pressing arc grooves 7 at the ends of the first pressing rod 5 and the second pressing rod 6. Pull both hands in opposite directions simultaneously, and the piston rod 3 of the syringe can be pulled out of the syringe barrel 1 to complete the contrast agent extraction action. Due to the characteristics of the labor-saving lever structure, when extracting the contrast agent, the contrast agent syringe adopting the technology of the present utility model can be easily completed.

Claims

1. A cross-lever labor-saving contrast agent syringe, comprising a syringe cartridge with symmetrical double finger rings and a syringe piston rod, characterized in that: It also includes a first pressure rod and a second pressure rod with the same structure. A first support is provided at the tail end of the syringe piston rod. The first pressure rod and the second pressure rod cross each other and are coaxially hinged to the first support. A second support is provided at the syringe cartridge push port. The first pressure rod and the second pressure rod are hinged to the second support respectively through the first connecting rod and the second connecting rod.

2. The cross-lever labor-saving contrast agent injector according to claim 1, characterized in that: The first pressure rod and the second pressure rod are long rods with curved arcs.

3. The cross-lever labor-saving contrast agent injector according to claim 1, characterized in that: The power arms of the first pressure rod and the second pressure rod are arc-shaped arms, and hand-pressure arc grooves are provided at the ends.

4. The cross-lever labor-saving contrast agent injector according to claim 1, characterized in that: The resistance arms of the first pressure rod and the second pressure rod are straight arms.

5. The cross-lever labor-saving contrast agent injector according to claim 1, characterized in that: The power arm lengths of the first pressure rod and the second pressure rod are greater than the resistance arm lengths.

6. The cross-lever labor-saving contrast agent injector according to claim 1, characterized in that: The cross section of the first support is an isosceles triangle.

7. The cross-lever labor-saving contrast agent injector according to claim 1, characterized in that: The first pressure rod and the second pressure rod cross each other and are coaxially hinged to the first support. The hinge position is located at the symmetry center of the upper part of the first support.

8. The cross-lever labor-saving contrast agent injector according to claim 1, characterized in that: The outer contour of the second support is a square.

9. The cross-lever labor-saving contrast agent injector according to claim 1, characterized in that: The resistance arm ends of the first pressure rod and the second pressure rod are hinged to the first connecting rod and the second connecting rod respectively.

10. The cross-lever labor-saving contrast agent injector according to claim 1, characterized in that: The first connecting rod and the second connecting rod are hinged to two sides of the second support respectively.

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