CN110811811A - Cardiac surgery freezing defibrillator - Google Patents

Abstract

Cryodefibrillator for cardiac surgery belongs to the technical field of medical instruments, and aims to solve the problems of easy tissue burning, disability and thrombus risk caused by an electric shock treatment method in the prior art. The invention comprises the following steps: the freezing airflow guide pipe is of a cylindrical structure, and an opening at one end of the freezing airflow guide pipe is used as an outflow port; the inflow adjusting structure is connected with external frozen gas supply equipment through a guide pipe, and the amount of frozen gas flowing into the frozen gas flow guide pipe is adjusted through the inflow adjusting structure; a reflux body coaxially arranged outside the frozen airflow duct; and the backflow body is close to the freezing cap that sealing connection can be dismantled to the outfall one end of freezing airflow pipe, freezing cap inside through the outfall of freezing airflow pipe and the inside intercommunication of freezing airflow pipe, freezing gas in the freezing cap is transmitted to keeping away from freezing cap one end by being close to freezing cap one end through the backflow body.

Description

Cardiac surgery cryo-defibrillator

technical field

The invention belongs to the technical field of medical devices, in particular to a cardiac surgery cryo-defibrillator.

Background technique

In recent years, medical technology has developed rapidly, but my country's medical devices are relatively backward. Large quantities of medical equipment need to be imported every year, which are expensive and have a particularly limited number of uses. For the problem of atrial fibrillation, surgical ablation of atrial fibrillation is the current overall trend. At present, Atrcure's dual radiofrequency ablation isolation forceps from the United States are popular in China. The double radiofrequency ablation isolation forceps adopts the electric shock treatment method. During the treatment process of electric shock treatment, if the emergency treatment is too late for anesthesia, the electric defibrillation patient will feel pain in an instant, and there is a risk of thrombosis, which may cause disability and easily burn tissue.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a cardiac surgery cryo-defibrillator, which solves the problems of easy tissue burn, disability and thrombosis risk in the prior art motor therapy methods.

To achieve the above object, the cardiac surgery cryo-defibrillator of the present invention includes:

a refrigerated airflow duct, the refrigerated airflow duct is a cylindrical structure, and one end of the refrigerated airflow duct is opened as an outlet;

an inflow adjustment structure connected with the other end of the refrigerated air flow conduit, the inflow adjustment structure is connected with an external refrigerated gas supply device through a guide pipe, and the amount of refrigerated gas flowing into the refrigerated air flow conduit is adjusted by the inflow adjustment structure;

a return fluid coaxially arranged outside the refrigerated airflow conduit;

And a freezing cap that is detachably sealed and connected with the return fluid near the outlet of the refrigerated airflow duct, the inside of the freezing cap is communicated with the inside of the refrigerated airflow duct through the outlet of the refrigerated airflow duct, and the freezing cap in the freezing cap The gas is transported through the return fluid from the end near the freezer cap to the end away from the freezer cap.

The defibrillator further includes a thermal insulation tube coaxially sleeved on the outside of the return fluid, and an end of the thermal insulation tube close to one end of the freezing cap is in contact with the end of the freezing cap.

The return fluid includes:

a backflow guide tube coaxially sleeved outside the refrigerated airflow conduit, the inner surface of the backflow guide tube is evenly distributed with a plurality of backflow grooves along the axis direction, and the backflow grooves extend from one end of the backflow guide tube to the other end; the The freezing cap is screwed with one end of the return guide tube and communicated with the return tank;

and a backflow adapter that is detachably and sealedly connected to the other end of the backflow guide tube, the backflow adapter is provided with a backflow outlet, and the backflow outlet communicates with the backflow tank.

The return fluid also includes a protective cover, the protective cover includes a cylindrical cover coaxially sleeved outside the return adapter and a return discharge body integrally connected with the cover body, the return discharge body is provided with A serpentine channel, one end of the serpentine channel located inside the protective cover is connected with the return outlet of the return adapter, and the other end of the serpentine channel is communicated with the outside world; the inner surface of the cover is processed with a matching positioning surface, and the refrigerated airflow conduit A guide surface is provided at a corresponding position, and the matching positioning surface and the guide surface cooperate to limit the rotation of the cover body relative to the refrigerated airflow duct.

The inflow adjustment structure includes:

An inflow tube that is sleeved on one end of the refrigerated airflow conduit away from the outlet and is slidably matched with respect to the refrigerated airflow conduit. One end is sealed, and the side wall of the refrigerated air duct close to the sealed end is provided with an inflow port that communicates with the inside, and the outside of the inflow cylinder is slidably fitted with the inner surface of the cover of the protective cover;

And the return spring arranged in the inflow cylinder, one end of the return spring is in contact with the end of the refrigerated airflow duct, and the other end is in contact with the end of the inflow cylinder, when the return spring is in a natural state, the inlet on the refrigerated airflow duct The conduit ports on the orifice and inlet barrel are misaligned.

The return spring material is nickel alloy or austenitic 304 stainless steel.

The defibrillator also includes a handle, which is a long strip structure with a connection hole in the middle; the connection hole and the return guide tube of the return fluid are matched by a key slot at one end of the return adapter, and the handle faces the freezing cap. One side is provided with four hand-held grooves, and the four hand-held grooves are arranged symmetrically with respect to the connecting hole; the handle is located between the temperature insulating pipe and the protective cover.

The front end of the freezing cap is in a circular concave shape.

The material of the freezing cap is 304 stainless steel, 301 stainless steel, titanium and titanium alloy or cobalt-based alloy.

The guide tube is a flexible conduit.

The beneficial effects of the present invention are as follows: the cardiac surgical cryo-defibrillator of the present invention acts on the left atrial appendage of the heart, the freezing cap is a structure that directly contacts the left atrial appendage, and the present invention adopts a metal element that has a faster heat conduction speed and is friendly to human tissue. , which is connected with the return guide pipe through the thread. The frozen gas after the action is realized in time to return, and the front end of the freezing cap is circular and concave. It is designed according to the shape of the left atrial appendage, which can contact the left atrial appendage in a large area and improve the action rate. The extremely cold gas pours in from the refrigerated airflow duct, is ejected from the outlet, and sprayed onto the freezing cap, so that the freezing cap can be rapidly cooled to achieve the purpose of rapid cooling. The jet of extremely cold gas flows back from the return tank. The returned frozen gas is discharged through the serpentine channel on the protective cover. The design of the serpentine channel can increase the flow time of the frozen gas inside the defibrillator to ensure that the discharged frozen gas will not cause damage to the operator. The outer wall is covered with a layer of insulation tube to prevent the normal tissue from frostbite during the operation. The invention has simple overall structure and convenient operation, and treats atrial fibrillation through the principle of instantaneous freezing, which is low in price, easy to control, relatively less harmful to human tissue, and allows the left atrial appendage to "calm down" and not discharge abnormally.

Description of drawings

1 is a schematic diagram of the overall structure of the cardiac surgery cryo-defibrillator of the present invention;

Fig. 2 is a schematic diagram of the structure of a hidden freezing cap in the cardiac surgery cryo-defibrillator of the present invention;

3 is a schematic structural diagram of an over-hidden protective cover in the cardiac surgery cryo-defibrillator of the present invention;

4 is a structural cross-sectional view of a cardiac surgery cryo-defibrillator of the present invention;

Among them: 1. Refrigerated airflow conduit, 101, outlet, 102, inlet, 103, guide surface, 2, inflow adjustment structure, 201, inflow cylinder, 202, conduit interface, 203, return spring, 3, return fluid, 301, return guide tube, 302, return groove, 303, return adapter, 304, return outlet, 305, protective cover, 306, cover body, 307, return discharge body, 308, serpentine channel, 4, refrigeration Cap, 5. Insulation tube, 6. Guide tube, 7. Handle, 701, Hand-held groove, 8. External refrigeration gas supply device.

Detailed ways

The embodiments of the present invention will be further described below with reference to the accompanying drawings.

Referring to accompanying drawings 1-4, the cardiac surgery cryo-defibrillator of the present invention includes:

The refrigerated airflow duct 1, the refrigerated airflow duct 1 is a cylindrical structure, and one end of the refrigerated airflow duct 1 is opened as an outlet 101;

The inflow adjustment structure 2 connected with the other end of the refrigerated air flow conduit 1, the inflow adjustment structure 2 is connected with the external refrigerated gas supply equipment 8 through the guide pipe 6, and the inflow adjustment structure 2 is adjusted to flow into the refrigerated air flow conduit 1. The amount of refrigeration gas in;

A return fluid 3 coaxially arranged outside the refrigerated airflow conduit 1;

And the freezing cap 4 that is detachably and hermetically connected with the return fluid 3 near the outlet 101 of the refrigerated airflow duct 1, and the inside of the freezing cap 4 communicates with the interior of the refrigerated airflow duct 1 through the outlet 101 of the refrigerated airflow duct 1 , the frozen gas in the freezing cap 4 is transmitted from the end close to the freezing cap 4 to the end far from the freezing cap 4 through the return fluid 3 . The connection between the freezing cap 4 and the return fluid 3 adopts a conical pipe thread connection to ensure sealing.

The defibrillator further includes an insulating tube 5 coaxially sleeved on the outside of the return fluid 3 , and the end of the insulating tube 5 close to one end of the freezing cap 4 is in contact with the end of the freezing cap 4 .

The return fluid 3 includes:

A return guide tube 301 is coaxially sleeved outside the refrigerated airflow conduit 1 , the inner surface of the return guide tube 301 is evenly distributed with a plurality of return grooves 302 along the axis direction, and the return groove 302 is formed by one end of the return guide tube 301 extend to the other end; the freezing cap 4 is screwed with one end of the return guide tube 301 and communicated with the return groove 302;

and a backflow adapter 303 detachably and sealedly connected to the other end of the backflow guide tube 301 , the backflow adapter 303 is provided with a backflow outlet 304 , and the backflow outlet 304 communicates with the backflow tank 302 . The inside of the return adapter 303 is a ring cavity structure, and the plane machining precision is high to ensure that no nitrogen leaks.

The return fluid 3 further includes a protective cover 305, and the protective cover 305 includes a cylindrical cover 306 coaxially sleeved outside the return adapter 303 and a return discharge body 307 integrally connected with the cover 306, The backflow discharge body 307 is provided with a serpentine channel 308, that is, a reciprocating channel to increase the flow time of the frozen gas inside the defibrillator. The serpentine channel 308 is located at one end of the protective cover 305 and the backflow adapter 303. The backflow outlet 304 of the refrigerated airflow is connected, and the other end of the serpentine channel 308 is communicated with the outside; The guide surface 103 cooperates to limit the rotation of the cover body 306 relative to the refrigerated airflow duct 1 .

The inflow adjustment structure 2 includes:

The inflow cylinder 201 is sleeved on one end of the refrigerated airflow conduit 1 away from the outflow port 101 and is slidably matched with respect to the refrigerated airflow conduit 1. One end of the refrigerated airflow duct 1 away from the outlet 101 is sealed and arranged, and the side wall of the refrigerated airflow duct 1 close to one end of the seal is provided with an inlet 102 that communicates with the inside, and the inlet 102 is a long strip groove; the The outside of the inflow cylinder 201 is slidably fitted with the inner surface of the cover body 306 of the protective cover 305;

And the return spring 203 arranged in the inflow cylinder 201, one end of the return spring 203 is in contact with the end of the refrigerated air flow conduit 1, and the other end is in contact with the end of the inflow cylinder 201. When the return spring 203 is in a natural state, The inflow port 102 on the refrigerated airflow conduit 1 and the conduit interface 202 on the inflow cylinder 201 are arranged in a staggered position. Push the inflow cylinder 201 inward, the inflow cylinder 201 increases the overlap relative to the refrigerated airflow duct 1, compresses the return spring 203, and then adjusts the inflow port 102 on the refrigerated airflow duct 1 and the duct interface 202 on the inflow cylinder 201. amount of overlap.

The return spring 203 is an anti-low temperature spring, and the material is nickel alloy or austenitic 304 stainless steel.

The defibrillator also includes a handle 7, which is a long strip structure with a connection hole in the middle; the connection hole and the return guide tube 301 of the return fluid 3 are matched with one end of the return adapter 303 through a key slot, so The handle 7 is provided with four hand-held grooves 701 on the side facing the freezing cap 4 , and the four hand-held grooves 701 are symmetrically arranged with respect to the connecting hole;

The front end of the freezing cap 4 is in a circular concave shape.

The material of the freezing cap 4 is 304 stainless steel, 301 stainless steel, titanium and titanium alloy or cobalt-based alloy.

The guide tube 6 is a flexible conduit.

The refrigerated gas of the present invention adopts extremely cold nitrogen gas, and the external refrigerated gas supply device 8 is a liquid nitrogen storage control cabinet, which mainly controls the temperature and flow rate of the distributed nitrogen gas. In the present invention, a liquid nitrogen tank can be used as the external refrigerated gas supply device 8, a liquid nitrogen temperature controller can be connected to the liquid nitrogen tank to adjust the output temperature of the liquid nitrogen tank, and the liquid nitrogen temperature controller can adopt the technology disclosed in the patent number CN201621128434.0 Program. The invention adopts the liquid nitrogen cold air mass to freeze the left atrial appendage to achieve the purpose of atrial defibrillation and achieve the therapeutic effect.

The specific process of using the present invention is as follows: first, ensure that there is still liquid nitrogen in the external refrigerated gas supply device 8, open the valve, and adjust the temperature. Fully sterilize the instruments in preparation for surgery. After the doctor opens the wound, the freezing cap 4 is directly attached to the left atrial appendage of the heart. Four fingers press the corresponding hand-held groove 701 on the handle 7, and the thumb presses the end of the inflow cylinder 201 at the rear, and gradually exerts force. The guide tube 6 enters the refrigerated air flow duct 1, and the gas will quickly spew to the freezing cap 4, which is a metal thin-walled element, and the freezing cap 4 is rapidly cooled. "Quiet down" the left atrial appendage to treat atrial fibrillation. The cold air flows back from the return tank 302 and is released at the return adapter 303 . In order to prevent the outflowing air from frostbiting the hands of the medical staff, the air coming out of the return adapter 303 is blocked by the protective cover 305, and "wanders" inside to be discharged. After the surgeon completes the operation, he only needs to release the inflow cylinder 201. Under the action of the return spring 203, the inflow cylinder 201 runs relatively backward, and the conduit interface 202 and the inflow port 102 of the frozen airflow conduit 1 are staggered, and the flow to the freezer is stopped. Air is supplied in the airflow duct 1, and the handle 7 is quickly pulled out with four fingers, and the external refrigeration gas supply device 8 is closed. The whole operation process is simple and easy to grasp.

Claims (10)

1. A cardiac surgical cryodefibrillator comprising:

the refrigerating airflow duct (1), the refrigerating airflow duct (1) is of a cylindrical structure, and one end of the refrigerating airflow duct (1) is opened to be used as an outlet (101);

the inflow adjusting structure (2) is connected with the other end of the freezing airflow guide pipe (1), the inflow adjusting structure (2) is connected with an external freezing air supply device (8) through a guide pipe (6), and the amount of freezing air flowing into the freezing airflow guide pipe (1) is adjusted through the inflow adjusting structure (2);

a reflux body (3) coaxially arranged outside the freezing airflow duct (1);

and with backward flow body (3) are close to the freezing air current pipe (1) go out flow mouth (101) one end can dismantle sealing connection's freezing cap (4), freezing cap (4) inside is through the inside intercommunication of the flow mouth (101) and the freezing air current pipe (1) of freezing air current pipe (1), freezing gas in freezing cap (4) is through backward flow body (3) by being close to freezing cap (4) one end transmission to keeping away from freezing cap (4) one end.

2. The cardiac surgical cryodefibrillator as claimed in claim 1, further comprising a thermal insulating tube (5) coaxially sleeved outside the return fluid (3), wherein an end of the thermal insulating tube (5) near one end of the freezing cap (4) is in contact with an end of the freezing cap (4).

3. Cardiac surgery cryodefibrillator as claimed in claim 1 or 2, characterized in that the return fluid (3) comprises:

the backflow guide pipe (301) is coaxially sleeved outside the freezing airflow guide pipe (1), a plurality of backflow grooves (302) along the axial direction are uniformly distributed on the circumference of the inner surface of the backflow guide pipe (301), and the backflow grooves (302) extend from one end of the backflow guide pipe (301) to the other end; the freezing cap (4) is in threaded connection with one end of the backflow guide pipe (301) and is communicated with the backflow groove (302);

and with backflow adapter (303) that sealing connection can be dismantled to backward flow stand pipe (301) other end, backflow adapter (303) are provided with backward flow export (304), backward flow export (304) with reflux groove (302) intercommunication.

4. The cardiac surgery freeze defibrillator as set forth in claim 3, wherein the backflow body (3) further comprises a protective cover (305), the protective cover (305) comprises a cylindrical cover body (306) coaxially sleeved outside the backflow adaptor (303) and a backflow vent body (307) integrally connected with the cover body (306), a serpentine channel (308) is arranged in the backflow vent body (307), one end of the serpentine channel (308) located in the protective cover (305) is communicated with the backflow outlet (304) of the backflow adaptor (303), and the other end of the serpentine channel (308) is communicated with the outside; the inner surface of the cover body (306) is machined with a matching positioning surface, the corresponding position of the freezing airflow guide pipe (1) is provided with a guide surface (103), and the matching positioning surface and the guide surface (103) are matched to limit the cover body (306) to rotate relative to the freezing airflow guide pipe (1).

5. The cardiac surgical cryodefibrillator as claimed in claim 4, wherein the inflow adjustment structure (2) comprises:

the freezing airflow guide pipe (1) is sleeved with an inflow cylinder (201) which is far away from one end of the outflow port (101) and is in sliding fit with the freezing airflow guide pipe (1), the side wall of the inflow cylinder (201) is communicated with the guide pipe (6) through a guide pipe connector (202), one end, far away from the outflow port (101), of the freezing airflow guide pipe (1) is arranged in a sealing mode, the side wall, close to one end in the sealing mode, of the freezing airflow guide pipe (1) is provided with an inflow port (102) communicated with the inside of the freezing airflow guide pipe, and the outside of the inflow cylinder (201) is in sliding fit with the inner surface of a cover body (306) of the protective;

and the return spring (203) is arranged in the inflow cylinder (201), one end of the return spring (203) is contacted with the end part of the freezing airflow guide pipe (1), the other end of the return spring is contacted with the end part of the inflow cylinder (201), and when the return spring (203) is in a natural state, the inflow port (102) on the freezing airflow guide pipe (1) and the guide pipe interface (202) on the inflow cylinder (201) are arranged in a staggered mode.

6. The cardiac surgical cryodefibrillator as set forth in claim 5, wherein the return spring (203) material is a nickel alloy or austenitic 304 stainless steel.

7. The cardiac surgery freeze defibrillator as set forth in claim 4, further comprising a handle (7), wherein the handle (7) is an elongated structure with a connecting hole provided in the middle; the connecting hole is matched with one end, close to the backflow adapter (303), of the backflow guide pipe (301) of the backflow body (3) through a key groove, four handheld grooves (701) are formed in one side, facing the freezing cap (4), of the handle (7), and the four handheld grooves (701) are symmetrically arranged around the connecting hole; the handle (7) is positioned between the thermal insulation pipe (5) and the protective cover (305).

8. The cardiac surgical cryodefibrillator as set forth in claim 1, wherein the freezing cap (4) is rounded and concave at its forward end.

9. The cardiac surgical cryodefibrillator as claimed in claim 1 or 8, wherein the material of the freezing cap (4) is 304 stainless steel, 301 stainless steel, titanium and titanium alloys or cobalt-based alloys.

10. The cardiac surgical cryodefibrillator as set forth in claim 1, wherein the delivery tube (6) is a flexible tube.

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