Cardiac surgery freezing defibrillator

Abstract

The invention discloses a cardiac surgery freezing defibrillator, and belongs to the technical field of medical instruments, the cardiac surgery freezing defibrillator comprises a handle, a heat preservation pipe mounted at the end of the handle, a discharge pipe located in the heat preservation pipe and a freezing cap mounted at the end of the heat preservation pipe, and an angle adjusting mechanism is arranged between the end of the heat preservation pipe and the freezing cap; a diffusion mechanism is arranged at the end, close to the freezing cap, outside the heat preservation pipe. An extraction mechanism composed of a syringe, a liquid extraction pipe, a discharge pipe, a first piston and a pull rod is arranged in a handle, and is matched with an elastic assembly composed of a first spring and a positioning plate and a positioning mechanism composed of a mounting groove, a trapezoidal insertion block, an insertion groove, a third spring, a buckle plate and a connecting rope for use, so that in the freezing process, the liquid extraction pipe is not prone to falling off; the liquid nitrogen can be directly extracted to quickly freeze, and in addition, the extraction amount of the liquid nitrogen can be quantitatively controlled according to the stretching length of the pull rod, so that the freezing temperature is controlled, and the freezing effect is ensured.

Description

Technical Field

[0001] The invention relates to a defibrillator, in particular to a cardiac surgery cryo-defibrillator, and belongs to the technical field of medical equipment. Background Art

[0002] The cardiac surgery cryodefibrillator is an important medical device used in cardiac surgery. It freezes the myocardial tissue by releasing low-temperature energy, thereby achieving the purpose of defibrillation. Compared with traditional electric defibrillation, cryodefibrillator can more accurately control the range and depth of energy release, reducing damage to surrounding normal tissues.

[0003] In the prior art, for example, the invention with application number 201911118777.7 discloses a cardiac surgical cryodefibrillator. In order to solve the problem that during the treatment process of electric shock therapy, if there is no time for anesthesia for emergency treatment, the patient will be instantly in pain during electric defibrillation, and there is a risk of thrombosis, which may cause disability and easy tissue burns, a metal element with a fast heat conduction speed and friendly to human tissue is connected to the reflux guide tube through a thread. The refrigerant gas after the action is realized to reflux in time, and the front end of the freezing cap is circular and concave, and is designed according to the shape of the left atrial appendage, so that it can contact the left atrial appendage over a large area, thereby improving the action rate. The extremely cold gas flows in from the freezing airflow duct, sprays out from the outlet, and sprays onto the freezing cap, so that the freezing cap is cooled rapidly, thereby achieving the purpose of rapid cooling.

[0004] Similar to the above application, there are still some shortcomings: During the freezing process, the discharge of cold air is controlled by pressing the fingers. The freezing time and the amount of gas discharged need to be controlled based on the doctor's experience, which affects the freezing effect. The freezing rate is slow during gas refrigeration. At the same time, the angle of the freezing cap cannot be adjusted during use, which requires the equipment to be placed vertically in the position of the left atrial appendage, which is inconvenient to operate. In addition, the nitrogen cannot diffuse quickly after being discharged, resulting in a high nitrogen concentration around the doctor, which can easily cause discomfort.

[0005] Therefore, a cardiac surgery cryo-defibrillator is designed to optimize the above problems. Summary of the invention

[0006] The main purpose of the present invention is to provide a cardiac surgical cryo-defibrillator, which is provided with an extraction mechanism composed of a syringe, a liquid extraction tube, a discharge tube, a first piston, and a pull rod inside the handle, and is used in conjunction with an elastic component composed of a first spring and a positioning plate, and a positioning mechanism composed of an installation groove, a trapezoidal plug block, a slot, a third spring, a buckle plate, and a connecting rope, so that during the freezing process, liquid nitrogen can be directly extracted to quickly freeze. In addition, the amount of liquid nitrogen extracted can be quantitatively controlled according to the stretching length of the pull rod, thereby controlling the freezing temperature and ensuring the freezing effect. By arranging an arc at the end of the insulation tube The angle adjustment mechanism consists of an arc groove, a ball, a through pipe, a nozzle, and an exhaust hole. The freezing cap is installed at the end of the nozzle. During the use of the device, the ball is controlled to rotate inside the arc groove to change the position and angle of the freezing cap. The use of the device is more convenient. An air hood and an air guide tube are provided at the end of the insulation tube, and then a gas dispersion mechanism consisting of an air cylinder, a second piston, a second spring, and a pull rope is used. The pull rope is fixed on the positioning plate and can automatically intake air into the interior of the air cylinder as the positioning plate moves. During the freezing process, the gas is automatically discharged and the vaporized nitrogen is diffused outward to avoid discomfort to the doctor caused by the high nitrogen solubility.

[0007] The purpose of the present invention can be achieved by adopting the following technical solutions: A cardiac surgical cryo-defibrillator comprises a handle, a heat preservation tube installed at the end of the handle, a discharge tube located inside the heat preservation tube, and a freezing cap installed at the end of the heat preservation tube, an angle adjustment mechanism is provided between the end of the heat preservation tube and the freezing cap, a diffusion mechanism is provided at one end of the outer side of the heat preservation tube close to the freezing cap, a connector is provided at the bottom of the handle close to one end of the heat preservation tube, a liquid nitrogen tank is installed at the bottom of the connector, a control chamber is provided inside the handle, a syringe connected to the end of the discharge tube is fixed inside the control chamber, a liquid extraction tube extending to the inside of the liquid nitrogen tank and connected to the syringe is installed inside the connector, a one-way valve is installed at the ends of the discharge tube and the discharge tube, a pressure-stabilizing gas valve is provided on the connector, a first piston is slidably installed inside the syringe, and a pulling release mechanism is provided on the side of the first piston away from the discharge tube.

[0008] Preferably: a hanging ring is provided on the top of the handle, and anti-slip grooves are provided on the outer side of the gripping portion at the bottom end of the handle.

[0009] Preferably: the pulling release mechanism includes a pull rod, a positioning plate, a first spring, a positioning mechanism and a safety mechanism; a pull rod is fixed to the end of the first piston away from the discharge pipe, the pull rod slides and extends to the outside of the handle, the inner bottom of the control chamber is provided with a positioning mechanism for fixing the moving distance of the pull rod, a positioning plate is vertically fixed on the pull rod inside the control chamber, a first spring is provided between the positioning plate and the end of the control chamber, and the outer end of the handle is provided with a safety mechanism for locking the pull rod.

[0010] Preferably: the positioning mechanism includes an installation groove, a trapezoidal plug-in block, a slot, a third spring, a buckle plate and a connecting rope. The installation groove is opened at the bottom of the control compartment, and a trapezoidal plug-in block is vertically slidably installed inside the installation groove. The bottom of the pull rod is opened with a slot matching the trapezoidal plug-in block along the length direction. A third spring is provided between the bottom end of the trapezoidal plug-in block and the bottom end of the installation groove. A connecting rope is fixed to the bottom of the trapezoidal plug-in block, and the connecting rope slides and extends to the outside of the handle. A buckle plate is hingedly installed at the bottom of the handle, and the bottom end of the connecting rope is connected to the buckle plate.

[0011] Preferably, three groups of slots are provided, and the spacings between adjacent slots are the same, and the cross-sectional shapes of the slots are all right-angled trapezoids.

[0012] Preferably, a pull block is fixed to one end of the pull rod located outside the handle, and an anti-slip pad is provided on the inner side of the pull block.

[0013] Preferably: the safety mechanism includes a sleeve, a linear groove, a positioning groove and a limit rod, the sleeve is rotatably installed on the outer end of the handle, the pull rod passes through the inside of the sleeve, the outer side of the sleeve is provided with a linear groove along the length direction, the outer side of the linear groove is evenly provided with positioning grooves, the number of positioning grooves is the same as the number of slots, and the spacing between adjacent positioning grooves is the same as the spacing between adjacent slots, a limit rod is vertically fixed on the outer side of the pull rod, and the limit rod is located inside the linear groove.

[0014] Preferably: the angle adjustment mechanism includes an arc groove, a ball, a through pipe, a nozzle and an exhaust hole, the arc groove is opened at the end of the insulation pipe, the end of the discharge pipe is connected to the arc groove, a ball is rotatably installed inside the arc groove, a through pipe that passes through the ball is vertically fixed to the outer side of the ball, a nozzle is fixed at the end of the through pipe away from the ball, exhaust holes are evenly opened on the outside of the nozzle, and a freezing cap is installed at the end of the nozzle.

[0015] Preferably: the diffusion mechanism includes an air hood, an air guide tube and an exhaust assembly, the air hood is fixed to the end of the insulation tube, and a gap is left between the inner side of the air hood and the insulation tube, the open part of the air hood is close to the exhaust hole, an air guide tube is installed on the outside of the air hood, and an exhaust assembly connected to the air guide tube is provided inside the handle.

[0016] Preferably: the exhaust assembly includes an air cylinder, a second piston, a second spring and a pull rope, the air cylinder is fixed inside the control chamber, the end of the air cylinder is connected to the air duct, the second piston is slidably installed inside the air cylinder, a second spring is installed between the second piston and the end of the air cylinder, and a pull rope is fixed between the outer edge of the second piston and the positioning plate.

[0017] The beneficial effects of the present invention are: A cardiac surgical cryo-defibrillator provided by the present invention is provided with an extraction mechanism consisting of a syringe, a liquid extraction tube, a discharge tube, a first piston, and a pull rod inside a handle, and is used in conjunction with an elastic component consisting of a first spring and a positioning plate, and a positioning mechanism consisting of an installation groove, a trapezoidal plug block, a slot, a third spring, a buckle plate, and a connecting rope, so that during the freezing process, liquid nitrogen can be directly extracted to quickly freeze. In addition, the amount of liquid nitrogen extracted can be quantitatively controlled according to the stretching length of the pull rod, thereby controlling the freezing temperature and ensuring the freezing effect. An angle adjustment mechanism consisting of an arc groove, a ball, a through pipe, a nozzle and an exhaust hole is arranged at the end of the insulation pipe, and a freezing cap is installed at the end of the nozzle. During the use of the device, the ball is controlled to rotate inside the arc groove, so that the position and angle of the freezing cap can be changed, and the use of the device is more convenient. An air hood and an air guide tube are provided at the end of the insulation tube in combination with an air dispersion mechanism consisting of an air cylinder, a second piston, a second spring, and a pull rope. The pull rope is fixed on a positioning plate, and can automatically intake air into the air cylinder as the positioning plate moves. During the freezing process, the gas is automatically discharged, and the vaporized nitrogen is diffused outward, so as to avoid discomfort to the doctor caused by the high nitrogen solubility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front cross-sectional view of a preferred embodiment of a cardiac surgery cryo-defibrillator of the present invention; Figure 2 It is a front view of a preferred embodiment of a cardiac surgery cryo-defibrillator of the present invention; Figure 3 A diagram of an angle adjustment mechanism of a preferred embodiment of a cardiac surgery cryo-defibrillator of the present invention; Figure 4 It is a cross-sectional view of the handle of a preferred embodiment of a cardiac surgery cryo-defibrillator of the present invention; Figure 5 It is a diagram of an exhaust assembly of a preferred embodiment of a cardiac surgical cryo-defibrillator of the present invention; Figure 6 A diagram of a safety mechanism of a preferred embodiment of a cardiac surgical cryo-defibrillator according to the present invention; Figure 7 A preferred embodiment of a cardiac surgery cryo-defibrillator of the present invention Figure 4 Enlarged view of point A in the middle; Figure 8 A preferred embodiment of a cardiac surgery cryo-defibrillator of the present invention Figure 4 Enlarged view of point B in the middle.

[0019] In the figure: 1. handle; 2. insulation tube; 3. discharge tube; 4. freezing cap; 5. angle adjustment mechanism; 6. diffusion mechanism; 7. connector; 8. liquid nitrogen tank; 9. control chamber; 10. syringe; 11. extraction tube; 12. first piston; 13. pull rod; 14. positioning plate; 15. first spring; 16. positioning mechanism; 17. insurance mechanism; 18. arc groove; 19. ball; 20. through pipe; 21. nozzle; 22. exhaust hole; 23. air cover; 24. air guide tube; 25. air cylinder; 26. second piston; 27. second spring; 28. pull rope; 29. ​​installation groove; 30. trapezoidal plug block; 31. slot; 32. third spring; 33. buckle plate; 34. connecting rope; 35. sleeve; 36. linear groove; 37. positioning groove; 38. limit rod. DETAILED DESCRIPTION

[0020] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0021] like Figure 1-Figure 8 As shown, the present embodiment provides a cardiac surgical cryodefibrillator, comprising a handle 1, an insulation tube 2 installed at the end of the handle 1, a discharge tube 3 located inside the insulation tube 2, and a freezing cap 4 installed at the end of the insulation tube 2, an angle adjustment mechanism 5 is provided between the end of the insulation tube 2 and the freezing cap 4, a diffusion mechanism 6 is provided at the end of the outer side of the insulation tube 2 close to the freezing cap 4, a connector 7 is provided at the bottom of the handle 1 close to the end of the insulation tube 2, a liquid nitrogen tank 8 is installed at the bottom of the connector 7, a control compartment 9 is provided inside the handle 1, a syringe 10 connected to the end of the discharge tube 3 is fixed inside the control compartment 9, a liquid extraction tube 11 extending to the inside of the liquid nitrogen tank 8 and connected to the syringe 10 is installed inside the connector 7, a one-way valve is installed at the ends of the discharge tube 3 and the discharge tube 11, a pressure-stabilizing gas valve is provided on the connector 7, a first piston 12 is slidably installed inside the syringe 10, the first piston 12 is made of low-temperature resistant rubber, and a pulling release mechanism is provided on the side of the first piston 12 away from the discharge tube 3.

[0022] The overall working principle is as follows: before use, liquid nitrogen is injected into the interior of the liquid nitrogen tank 8, and then the liquid nitrogen tank 8 is installed on the connector 7, and the liquid extraction tube 11 is inserted into the interior of the liquid nitrogen. When in use, hold the handle 1 with one hand, and use the other hand to pull the first piston 12 through the pulling and releasing mechanism to draw a certain amount of liquid nitrogen into the syringe 10 for storage. The extraction amount is controlled according to the freezing temperature. After the liquid nitrogen is extracted, the angle of the freezing cap 4 is adjusted by the angle adjustment mechanism 5, and the freezing cap 4 is attached to the left atrial appendage of the heart, and then the first piston 12 is released by the pulling and releasing mechanism. The first piston 12 obtains the thrust provided by the pulling and releasing mechanism, and quickly squeezes out the liquid nitrogen in the syringe 10. The liquid nitrogen is sprayed on the surface of the freezing cap 4 through the discharge pipe 3, and the freezing cap 4 is quickly cooled. Then the vaporized nitrogen is discharged into the room, and is quickly diffused outward by the diffusion mechanism 6 to avoid discomfort caused by excessive local nitrogen concentration.

[0023] In this embodiment, a hanging ring is provided on the top of the handle 1, and anti-slip grooves are provided on the outer side of the gripping portion at the bottom end of the handle 1.

[0024] Partial working principle: The use of the hanging ring allows the device to be hung after use, and the opening of the anti-slip groove improves the stability of holding.

[0025] In this embodiment, the pulling release mechanism includes a pull rod 13, a positioning plate 14, a first spring 15, a positioning mechanism 16 and a safety mechanism 17. The pull rod 13 is fixed to the end of the first piston 12 away from the discharge pipe 3. The pull rod 13 slides and extends to the outside of the handle 1. The inner bottom of the control chamber 9 is provided with a positioning mechanism 16 for fixing the moving distance of the pull rod 13. A positioning plate 14 is vertically fixed on the pull rod 13 inside the control chamber 9. A first spring 15 is provided between the positioning plate 14 and the end of the control chamber 9. The outer end of the handle 1 is provided with a safety mechanism 17 for locking the pull rod 13.

[0026] Local working principle: When controlling the sliding of the first piston 12 to extract liquid nitrogen, the pull rod 13 is pulled outward, and after the pull rod 13 moves to a fixed position, it will be positioned by the positioning mechanism 16, and the amount of liquid nitrogen extracted is controlled according to the different positioning positions. During the sliding of the pull rod 13, the first spring 15 will be compressed by the positioning plate 14. When the positioning state of the pull rod 13 is released, the first spring 15 automatically resets, provides thrust to the pull rod 13, and pushes out the liquid nitrogen.

[0027] In this embodiment, the positioning mechanism 16 includes a mounting groove 29, a trapezoidal plug-in block 30, a slot 31, a third spring 32, a buckle plate 33 and a connecting rope 34. The mounting groove 29 is opened at the bottom of the control compartment 9, and a trapezoidal plug-in block 30 is vertically slidably installed inside the mounting groove 29. The bottom of the pull rod 13 is opened along the length direction with a slot 31 that cooperates with the trapezoidal plug-in block 30. A third spring 32 is provided between the bottom end of the trapezoidal plug-in block 30 and the bottom end of the mounting groove 29. A connecting rope 34 is fixed to the bottom of the trapezoidal plug-in block 30, and the connecting rope 34 slides and extends to the outside of the handle 1. A buckle plate 33 is hingedly installed at the bottom of the handle 1, and the bottom end of the connecting rope 34 is connected to the buckle plate 33.

[0028] Local working principle: during the sliding process of the pull rod 13, when the slot 31 on the pull rod 13 is located at the top of the trapezoidal plug block 30, the trapezoidal plug block 30 will automatically be inserted into the inside of the slot 31 to limit the pull rod 13 to avoid the reverse movement of the pull rod 13. Due to the setting of the beveled edge on the trapezoidal plug block 30, the pull rod 13 will not be hindered when being pulled outward, and only the resetting of the pull rod 13 will be hindered. Therefore, it is convenient to pull the pull rod 13 outward. When the liquid nitrogen is discharged, the buckle plate 33 is triggered to pull the trapezoidal plug block 30 down to the inside of the mounting groove 29, and the trapezoidal plug block 30 is separated from the slot 31. The pull rod 13 is quickly reset under the elastic force of the first spring 15.

[0029] In this embodiment, three groups of slots 31 are provided, and the intervals between adjacent slots 31 are the same. The cross-sectional shapes of the slots 31 are all right-angled trapezoids.

[0030] Partial working principle: by opening three groups of slots 31, three-speed adjustment can be performed during the liquid nitrogen extraction process to control the extraction amount of liquid nitrogen.

[0031] In this embodiment, a pull block is fixed to one end of the pull rod 13 located outside the handle 1, and an anti-slip pad is provided on the inner side of the pull block.

[0032] Partial working principle: The use of the pull block can conveniently clamp the end of the pull rod 13 with fingers, making pulling more convenient.

[0033] In this embodiment, the safety mechanism 17 includes a sleeve 35, a linear groove 36, a positioning groove 37 and a limit rod 38. The sleeve 35 is rotatably installed on the outer end of the handle 1, and the pull rod 13 passes through the inside of the sleeve 35. The outer side of the sleeve 35 is provided with a linear groove 36 along the length direction, and the outer side of the linear groove 36 is evenly provided with positioning grooves 37. The number of positioning grooves 37 is the same as the number of slots 31, and the spacing between adjacent positioning grooves 37 is the same as the spacing between adjacent slots 31. A limit rod 38 is vertically fixed to the outer side of the pull rod 13, and the limit rod 38 is located inside the linear groove 36.

[0034] Local working principle: After the extraction of liquid nitrogen is completed, the trapezoidal plug block 30 is inserted into the slot 31, and the pull rod 13 is initially limited. In order to avoid accidental touch and the spraying of liquid nitrogen, the sleeve 35 can be rotated at this time, and the limit rod 38 located inside the linear groove 36 is slid into the positioning groove 37 outside the sleeve 35, and the pull rod 13 is limited for a second time. Through double limiting, the occurrence of accidental touch can be avoided. During freezing, it is necessary to first release the safety state of the pull rod 13 by the safety mechanism 17, and then pull the buckle plate 33 to release the pull rod 13.

[0035] In this embodiment, the angle adjustment mechanism 5 includes an arc groove 18, a ball 19, a through pipe 20, a nozzle 21 and an exhaust hole 22. The arc groove 18 is opened at the end of the insulation pipe 2, and the end of the discharge pipe 3 is connected to the arc groove 18. The ball 19 is rotatably installed inside the arc groove 18. The through pipe 20 that passes through the ball 19 is vertically fixed to the outer edge of the ball 19. The nozzle 21 is fixed at the end of the through pipe 20 away from the ball 19. The exhaust holes 22 are evenly opened on the outside of the nozzle 21, and the freezing cap 4 is installed at the end of the nozzle 21.

[0036] Local working principle: During use, in order to facilitate operation, the ball 19 can be controlled to rotate inside the arc groove 18, and the angles of the nozzle 21 and the freezing cap 4 can be changed to ensure that the freezing cap 4 can fit on the left atrial appendage. After the angle of the nozzle 21 is changed, the liquid nitrogen inside the discharge tube 3 will be discharged through the arc groove 18, the through pipe 20 and the nozzle 21, and the freezing cap 4 will be frozen and cooled, which is more convenient to use.

[0037] In this embodiment, the diffusion mechanism 6 includes an air hood 23, an air guide tube 24 and an exhaust assembly. The air hood 23 is fixed to the end of the insulation tube 2, and a gap is left between the inner side of the air hood 23 and the insulation tube 2. The open part of the air hood 23 is close to the exhaust hole 22. An air guide tube 24 is installed on the outer side of the air hood 23, and an exhaust assembly connected to the air guide tube 24 is provided inside the handle 1.

[0038] Local working principle: During the process of cryo-defibrillation of the left atrial appendage, nitrogen will be discharged to the outside from the exhaust hole 22, and at this time the exhaust component will supply air to the inside of the gas hood 23. The gas enters the inside of the gas hood 23 through the air guide tube 24, and then the gas is blown towards the nitrogen, which quickly diffuses the gas outward, avoiding the nitrogen from generating a local low temperature environment that causes frostbite to the patient or doctor, and also avoiding the high concentration of nitrogen from causing discomfort to the doctor.

[0039] In this embodiment, the exhaust assembly includes an air cylinder 25, a second piston 26, a second spring 27 and a pull rope 28. The air cylinder 25 is fixed inside the control chamber 9, and the end of the air cylinder 25 is connected to the air guide tube 24. The second piston 26 is slidably installed inside the air cylinder 25, a second spring 27 is installed between the second piston 26 and the end of the air cylinder 25, and a pull rope 28 is fixed between the outer edge of the second piston 26 and the positioning plate 14.

[0040] Local working principle: When the pull rod 13 is pulled outward, the positioning plate 14 will pull the second piston 26 inside the gas cylinder 25 through the pull rope 28, and at the same time stretch the second spring 27, so that the gas enters the interior of the gas cylinder 25. While the liquid nitrogen is discharged, the positioning plate 14 is quickly reset, and the second piston 26 inside the gas cylinder 25 is pulled by the second spring 27 and reset at a speed lower than the reset speed of the positioning plate 14, so that the gas inside the gas cylinder 25 is discharged and the gas is supplied to the inside of the gas hood 23.

[0041] The above description is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the scope disclosed by the present invention, which belong to the protection scope of the present invention.

Claims

1. A cardiac surgical cryo-defibrillator, comprising a handle (1), a heat preservation tube (2) mounted at the end of the handle (1), a discharge tube (3) located inside the heat preservation tube (2), and a cryocap (4) mounted at the end of the heat preservation tube (2), characterized in that: An angle adjustment mechanism (5) is provided between the end of the insulation tube (2) and the freezing cap (4); a diffusion mechanism (6) is provided at one end of the outer side of the insulation tube (2) close to the freezing cap (4); a connector (7) is provided at the bottom of the handle (1) close to one end of the insulation tube (2); a liquid nitrogen tank (8) is installed at the bottom of the connector (7); a control chamber (9) is provided inside the handle (1); a syringe (10) connected to the end of the discharge tube (3) is fixed inside the control chamber (9); a liquid extraction tube (11) extending into the liquid nitrogen tank (8) and connected to the syringe (10) is installed inside the connector (7); both ends of the discharge tube (3) and the liquid extraction tube (11) are installed with a one-way valve; a pressure-stabilizing gas valve is provided on the connector (7); a first piston (12) is slidably installed inside the syringe (10); a pulling release mechanism is provided on the side of the first piston (12) away from the discharge tube (3).

2. A cardiac surgery cryo-defibrillator according to claim 1, characterized in that: A hanging ring is provided on the top of the handle (1), and anti-slip grooves are provided on the outer side of the gripping portion at the bottom end of the handle (1).

3. A cardiac surgery cryo-defibrillator according to claim 1, characterized in that: The pulling release mechanism comprises a pull rod (13), a positioning plate (14), a first spring (15), a positioning mechanism (16) and a safety mechanism (17); a pull rod (13) is fixed to one end of the first piston (12) away from the discharge pipe (3); the pull rod (13) slides and extends to the outside of the handle (1); a positioning mechanism (16) for fixing the moving distance of the pull rod (13) is provided at the inner bottom of the control chamber (9); a positioning plate (14) is vertically fixed to the pull rod (13) inside the control chamber (9); a first spring (15) is provided between the positioning plate (14) and the end of the control chamber (9); and a safety mechanism (17) for locking the pull rod (13) is provided at the outer end of the handle (1).

4. A cardiac surgery cryo-defibrillator according to claim 3, characterized in that: The positioning mechanism (16) comprises a mounting groove (29), a trapezoidal plug-in block (30), a slot (31), a third spring (32), a buckle plate (33) and a connecting rope (34). The mounting groove (29) is provided at the bottom of the control compartment (9). A trapezoidal plug-in block (30) is vertically slidably installed inside the mounting groove (29). A slot (31) cooperating with the trapezoidal plug-in block (30) is provided at the bottom of the pull rod (13) along the length direction. A third spring (32) is provided between the bottom end of the trapezoidal plug-in block (30) and the bottom end of the mounting groove (29). A connecting rope (34) is fixed to the bottom of the trapezoidal plug-in block (30). The connecting rope (34) slidably extends to the outside of the handle (1). A buckle plate (33) is hingedly installed at the bottom of the handle (1). The bottom end of the connecting rope (34) is connected to the buckle plate (33).

5. A cardiac surgery cryo-defibrillator according to claim 4, characterized in that: Three groups of slots (31) are provided, and the spacing between adjacent slots (31) is the same. The cross-sectional figures of the slots (31) are all right-angled trapezoids.

6. A cardiac surgery cryo-defibrillator according to claim 3, characterized in that: A pull block is fixed to one end of the pull rod (13) located outside the handle (1), and an anti-slip pad is provided on the inner side of the pull block.

7. A cardiac surgery cryo-defibrillator according to claim 4, characterized in that: The safety mechanism (17) comprises a sleeve (35), a linear groove (36), a positioning groove (37) and a limiting rod (38). The sleeve (35) is rotatably mounted on the outer end of the handle (1). The pull rod (13) passes through the inside of the sleeve (35). The outer side of the sleeve (35) is provided with a linear groove (36) along the length direction. The outer side of the linear groove (36) is evenly provided with positioning grooves (37). The number of the positioning grooves (37) is the same as the number of the slots (31), and the spacing between adjacent positioning grooves (37) is the same as the spacing between adjacent slots (31). The limiting rod (38) is vertically fixed to the outer side of the pull rod (13), and the limiting rod (38) is located inside the linear groove (36).

8. A cardiac surgery cryo-defibrillator according to any one of claims 3 to 7, characterized in that: The angle adjustment mechanism (5) comprises an arc groove (18), a ball (19), a through pipe (20), a nozzle (21) and an exhaust hole (22). The arc groove (18) is provided at the end of the insulation pipe (2). The end of the discharge pipe (3) is connected to the arc groove (18). The ball (19) is rotatably mounted inside the arc groove (18). The through pipe (20) penetrating the ball (19) is vertically fixed to the outer side of the ball (19). The nozzle (21) is fixed to the end of the through pipe (20) away from the ball (19). The exhaust holes (22) are evenly arranged on the outer side of the nozzle (21). The freezing cap (4) is mounted at the end of the nozzle (21).

9. A cardiac surgery cryo-defibrillator according to claim 8, characterized in that: The diffusion mechanism (6) comprises an air hood (23), an air guide pipe (24) and an exhaust assembly. The air hood (23) is fixed to the end of the heat preservation pipe (2), and a gap is left between the inner side of the air hood (23) and the heat preservation pipe (2). The open part of the air hood (23) is close to the exhaust hole (22). The air guide pipe (24) is installed on the outer side of the air hood (23). The handle (1) is provided with an exhaust assembly in communication with the air guide pipe (24) inside.

10. A cardiac surgery cryo-defibrillator according to claim 9, characterized in that: The exhaust assembly comprises an air cylinder (25), a second piston (26), a second spring (27) and a pull rope (28). The air cylinder (25) is fixed inside the control chamber (9). The end of the air cylinder (25) is connected to the air guide pipe (24). The second piston (26) is slidably mounted inside the air cylinder (25). The second spring (27) is mounted between the second piston (26) and the end of the air cylinder (25). The pull rope (28) is fixed between the outer side of the second piston (26) and the positioning plate (14).

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