Cardioplegia device with stabilizing needle

Abstract

The application discloses a heart perfusion device with a stable needle, and the novel needle with stability adopts high-precision manufacturing technology and materials, can more accurately control the internal structure and design of the needle, and has better durability and stability, so that the quality and performance of the stable needle are guaranteed. A more safe and reliable design is adopted, for example, a 0.03mm ultra-fine high-strength magnesium alloy wire is adopted, on the one hand, the strength is high, and on the other hand, magnesium can be degraded in the body, so that the safety of the design is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a heart perfusion device with a stable needle. BACKGROUND

[0002] The heart is a muscle organ in the body of vertebrates, and its main function is to provide pressure for blood flow and push blood in the blood vessels in the circulatory system to supply oxygen and various nutrients to the tissues and organs of the whole body, so that cells can maintain normal metabolism and function. Before taking tissue samples in mouse experiments, heart perfusion is one of the most commonly used methods of tissue perfusion. The current commonly used perfusion method is to manually inject physiological saline or formaldehyde into the left ventricle of the animal heart by using a syringe. This method is time-consuming and laborious, and the perfusion effect is not very ideal. Moreover, during the injection process, the position and angle may deviate, and even the animal heart may rupture, causing the loss of experimental materials and affecting the progress of subsequent experiments.

[0003] In addition, the current perfusion method is limited by the size of the syringe, and the single injection capacity is limited, which requires a needle cylinder to be replaced for injection, resulting in multiple needle insertions and extractions. In order to prevent cross infection, the needle must be frequently replaced, which is a tedious and laborious process. Not only does it prolong the operation process, but it also consumes a large number of needles and causes multiple injuries to the animal heart. At the same time, the angle and position of each injection change, which reduces the perfusion effect of the surrounding tissues. SUMMARY

[0004] The purpose of the present application is to design a heart perfusion device with a stable needle.

[0005] In order to achieve the purpose of the present application, the technical solution adopted by the present application is as follows:

[0006] A heart perfusion device with a stable needle, comprising a needle cylinder, a needle head mounted at the end of the needle cylinder, a first cavity communicated with the bottom of the needle head, a second hole provided in the side wall of the first cavity, a limiting pull rod slidingly connected in the second hole, a limiting ring connected with the limiting pull rod, the limiting ring located in the first cavity, the outer diameter of the limiting ring consistent with the inner diameter of the first cavity, a plurality of first holes circumferentially provided in the inner wall of the upper part of the needle head, a limiting piece hingedly connected in the first hole, one end of an alloy wire connected with the inner side of the limiting piece, the other end of the alloy wire connected on the limiting piece, when the limiting pull rod is located at the bottom of the second hole, the limiting piece is located in the first hole, and the alloy wire is in a tight state; when the limiting pull rod is located at any position in the second hole, the limiting ring completely covers the second hole.

[0007] Further, the needle cylinder is communicated with a liquid inlet pipe, a drain vane is arranged in the liquid inlet pipe, the drain vane is connected with a motor, the motor is electrically connected with a power supply, a power switch is arranged on the needle cylinder, and the power switch is electrically connected with the power supply.

[0008] Further, the needle cylinder is provided with a sliding rheostat, and the sliding rheostat is electrically connected with the motor.

[0009] Further, the alloy wire is a 0.03mm ultra-fine high-strength magnesium alloy wire.

[0010] Further, the first hole is provided with a hinge, and the hinge is hinged with a limiting sheet; when the limiting pull rod is located at the bottom of the second hole, the limiting sheet has no gap with the first hole.

[0011] Compared with the prior art, the application has the advantages that:

[0012] 1. After the product pierces the heart, the hydraulic pressure in the needle head expands the limiting structure on the wall of the needle head during perfusion, so that the needle head can be stably fixed in the heart without position and angle deviation, reducing the risk of heart rupture and reducing the difficulty of experimental operation.

[0013] 2. The traditional syringe can be used only once after being filled, and its capacity often cannot meet the perfusion requirements, and frequent replacement of the needle is required to prevent cross infection, which is complicated and laborious, and often consumes a large number of needles. The product can be reused, eliminating the repeated plugging action, and also eliminating the step of refilling the syringe and reloading the needle. While reducing the damage to the heart caused by repeated plugging, it also reduces the environmental hazards caused by large-scale consumption of ordinary syringes. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structure schematic diagram of a heart perfusion device;

[0015] Figure 2 It is a structure schematic diagram of a needle insertion and needle removal state;

[0016] Figure 3 It is a structure schematic diagram of a needle perfusion state;

[0017] Figure 4 It is a structure schematic diagram of a needle cylinder;

[0018] Figure 5 It is a structure schematic diagram of a motor.

[0019] 1. needle cylinder; 2. needle; 3. motor; 4. first cavity; 5. limiting pull rod; 6. limiting ring; 7. limiting sheet; 8. alloy wire; 9. second hole; 10. first hole; 11. sliding rheostat; 12. power switch; 13. drain vane; 14. motor; 15. power supply; 16. hinge. DETAILED DESCRIPTION

[0020] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, describes a cardiac perfusion device with a stable needle according to the present invention:

[0021] Example 1

[0022] like Figures 1-5 As shown, a cardiac perfusion device with a stable needle includes a syringe 1, with a needle 2 installed at the end of the syringe 1. The bottom of the needle 2 is connected to a first cavity 4. A second hole 9 is opened on the side wall of the first cavity 4. A limiting rod 5 is slidably connected in the second hole 9. The limiting rod 5 is connected to a limiting ring 6. The limiting ring 6 is located inside the first cavity 4, and the outer diameter of the limiting ring 6 is the same as the inner diameter of the first cavity 4. A plurality of first holes 10 are circumferentially opened on the upper inner wall of the needle 2. A hinge 16 is installed on the top of the first hole 10. The hinge 16 is hinged to a limiting piece 7. When the limiting rod 5 is located at the bottom of the second hole 9, there is no gap between the limiting piece 7 and the first hole 10. One end of an alloy wire 8 is connected to the inner side of the limiting plate 7, and the other end of the alloy wire 8 is connected to the limiting plate 7. When the limiting rod 5 is located at the bottom of the second hole 9, the limiting plate 7 is located inside the first hole 10, and the alloy wire 8 is in a taut state. When the limiting rod 5 is located at any position inside the second hole 9, the limiting ring 6 completely blocks the second hole 9. The alloy wire 8 is a 0.03 mm ultra-fine high-strength magnesium alloy wire.

[0023] The syringe 1 is connected to an inlet tube 3, and a drain leaf 13 is installed inside the inlet tube 3. The drain leaf 13 is connected to a motor 14, and the motor 14 is electrically connected to a power supply 15. A power switch 12 is installed on the syringe 1, and the power switch 12 is electrically connected to the power supply 15. A sliding rheostat 11 is also installed on the syringe 1, and the sliding rheostat 11 is electrically connected to the motor 14.

[0024] The specific implementation method is as follows:

[0025] 1. For example Figure 2 As shown, during needle insertion and withdrawal: pulling the limiting rod 5 backward causes the internal limiting ring 6 to move backward, pulling and tightening the 0.03 mm ultra-fine high-strength magnesium alloy wire. The 0.03 mm ultra-fine high-strength magnesium alloy wire pulls the limiting plate 7, closing the limiting plate 7, which then fuses with the needle tip 2 wall. At this point, the limiting plate 7 closes without any resistance.

[0026] 2. For example Figure 3As shown, when perfusion: first after the needle 2 into the limit sheet 7 at this time in the closed state, then the limit pull rod 5 forward, the internal limit ring 6 will 0.03 mm ultra-fine high-strength magnesium alloy wire forward, at this time 0.03 mm ultra-fine high-strength magnesium alloy wire in the relaxed state, but the limit sheet 7 is still closed, start perfusion, limit sheet 7 by the needle 2 in the fluid pressure on the needle 2 inner wall, so that the limit sheet 7 from inside to outside unfolding, unfolding to 0.03 mm ultra-fine high-strength magnesium alloy wire in the tight state, is drawn by it, so as to fix the angle of unfolding, limit sheet 7 is unfolded and fixed in the heart, or slightly unfolded in the body, the angle of the needle is stable.

[0027] 3. As shown in Figure 4 , 5 The automatic perfusion device: when perfusion is needed, the power supply 15 is started to supply power, the power supply 15 supplies power to the motor 14, the motor 14 rotates the drain blade 13, the drain blade 13 draws water to the needle 2, and at the same time the voltage output by the power supply 15 can be controlled by the sliding resistor 11 sliding at the needle cylinder to control the rotation speed of the motor 14, and then control the rotation speed of the drain blade 13, to control the perfusion speed. When not perfusing, turn off the power supply 15, and the perfusion device stops working.

[0028] The above is only the preferred embodiment of the present application, not any form of the present application to do any restrictions, any familiar with the professional technical personnel, without departing from the scope of the present application technical scheme, according to the technical essence of the present application to the above embodiment of any simple modification, equivalent change and modification, still belong to the scope of the present application technical scheme.

Claims

1. A heart perfusion device with a stabilizing needle, comprising a syringe (1) with a needle (2) mounted at one end, characterized in that: The needle (2) upper inner wall is provided with a plurality of first holes (10) in circumference, the needle (2) bottom is communicated with a first cavity (4), the first cavity (4) side wall is provided with a second hole (9), the second hole (9) is slidably connected with a limiting pull rod (5), the limiting pull rod (5) is connected with a limiting ring (6), the limiting ring (6) is located in the first cavity (4), and the outer diameter of the limiting ring (6) is consistent with the inner diameter of the first cavity (4), the first hole (10) is hingedly connected with a limiting piece (7), one end of the alloy wire (8) is connected to the inner side of the limiting piece (7), the other end of the alloy wire (8) is connected to the limiting ring (6), When the needle is inserted or withdrawn: the limiting pull rod (5) is pulled backward, so that the limiting ring (6) moves backward, the alloy wire (8) is pulled tight, the limiting piece (7) is closed by the alloy wire (8), and there is no gap between the limiting piece (7) and the first hole (10); When perfusion: first, the needle enters, at this time, the limiting piece (7) is in a closed state, then the limiting pull rod (5) is pushed forward, the limiting ring (6) pushes the alloy wire (8) forward, so that the alloy wire (8) is in a relaxed state, but the limiting piece (7) is still closed, the perfusion starts, the limiting piece (7) is expanded outward under the pressure of the fluid in the needle (2) on the inner wall of the needle, and when the alloy wire (8) is in a tight state, the limiting piece (7) is pulled to fix the angle of expansion; When the limiting pull rod (5) is located at the bottom of the second hole (9), the limiting piece (7) is located in the first hole (10), and the alloy wire (8) is in a tight state; when the limiting pull rod (5) is located at any position in the second hole (9), the limiting ring (6) completely covers the second hole (9).

2. The cardiac perfusion device having a stabilizing needle as defined in claim 1, wherein: The needle cylinder (1) is communicated with a liquid inlet pipe (3), the liquid inlet pipe (3) is provided with a drainage blade (13), the drainage blade (13) is connected with a motor (14), the motor (14) is electrically connected with a power supply (15), the needle cylinder (1) is provided with a power switch (12), and the power switch (12) is electrically connected with the power supply (15).

3. The cardiac perfusion device having a stabilizing needle as defined in claim 2, wherein: The needle cylinder (1) is further provided with a sliding rheostat (11), and the sliding rheostat (11) is electrically connected with the motor (14).

4. The cardiac perfusion device having a stabilizing needle as defined in claim 1, wherein: The alloy wire (8) is a 0.03mm ultra-fine high-strength magnesium alloy wire.

5. The cardiac perfusion device having a stabilized needle of claim 1, wherein: The first hole (10) top is provided with a hinge (16), the hinge (16) is hingedly connected with the limiting piece (7), when the limiting pull rod (5) is located at the bottom of the second hole (9), there is no gap between the limiting piece (7) and the first hole (10).

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