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

Translated fromChinese

心脏外科冷冻除颤仪Cardiac surgery cryo-defibrillator

技术领域technical field

本发明属于医疗器械技术领域，具体涉及一种心脏外科冷冻除颤仪。The invention belongs to the technical field of medical devices, in particular to a cardiac surgery cryo-defibrillator.

背景技术Background technique

近些年来，医疗技术发展迅猛，但是我国的医疗器械相对落后很多。每年需要进口大量的医疗设备，这些设备价格昂贵，使用次数特别有限。针对心脏房颤问题，做外科房颤消融是现在的整体趋势，目前国内都流行用美国的Atrcure的双射频消融隔离钳。该双射频消融隔离钳采用电击治疗方法，电击治疗方法在治疗过程中，如果紧急救治来不及麻醉，电除颤病人瞬间会比较疼痛，而且有血栓风险，有可能致残，还容易烧伤组织。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.

发明内容SUMMARY OF THE INVENTION

本发明的目的在于提出一种心脏外科冷冻除颤仪，解决现有技术存在的电机治疗方法存在的容易烧伤组织、致残以及导致血栓风险问题。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.

为实现上述目的，本发明的心脏外科冷冻除颤仪包括：To achieve the above object, the cardiac surgery cryo-defibrillator of the present invention includes:

冷冻气流导管，所述冷冻气流导管为筒状结构，所述冷冻气流导管一端端部开口作为出流口；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;

和所述冷冻气流导管另一端连接的进流调整结构，所述进流调整结构通过导流管和外部冷冻气供给设备连接，通过进流调整结构调整流入冷冻气流导管中的冷冻气的量；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;

同轴设置在所述冷冻气流导管外的回流体；a return fluid coaxially arranged outside the refrigerated airflow conduit;

以及和所述回流体靠近冷冻气流导管的出流口一端可拆卸密封连接的冷冻帽，所述冷冻帽内部通过冷冻气流导管的出流口和冷冻气流导管内部连通，所述冷冻帽内的冷冻气通过回流体由靠近冷冻帽一端传输至远离冷冻帽一端。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.

所述除颤仪还包括同轴套在所述回流体外侧的隔温管，所述隔温管靠近冷冻帽一端的端部与所述冷冻帽的端部接触。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.

所述回流体包括：The return fluid includes:

同轴套在所述冷冻气流导管外的回流导向管，所述回流导向管内表面圆周均布多个沿轴线方向的回流槽，所述回流槽由回流导向管的一端延伸至另一端；所述冷冻帽和所述回流导向管的一端螺纹连接，并与回流槽连通；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;

以及和所述回流导向管另一端可拆卸密封连接的回流转接头，所述回流转接头设置有回流出口，所述回流出口和所述回流槽连通。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.

所述回流体还包括防护罩，所述防护罩包括同轴套在所述回流转接头外的筒状的罩体以及和所述罩体一体连接的回流排出体，所述回流排出体内设置有蛇形通道，所述蛇形通道位于防护罩内部的一端和回流转接头的回流出口连通，蛇形通道的另一端与外界连通；所述罩体内表面加工有配合定位面，所述冷冻气流导管对应位置设置有导向面，所述配合定位面和导向面配合限制所述罩体相对所述冷冻气流导管转动。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.

所述进流调整结构包括：The inflow adjustment structure includes:

套在所述冷冻气流导管远离出流口一端并相对冷冻气流导管滑动配合的进流筒，所述进流筒侧壁通过一个导管接口和导流管连通，所述冷冻气流导管远离出流口一端密封设置，冷冻气流导管靠近密封设置一端的侧壁设置有和内部连通的进流口，所述进流筒外部和所述防护罩的罩体内表面滑动配合；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;

以及设置在所述进流筒内的复位弹簧，所述复位弹簧一端和冷冻气流导管端部接触，另一端和进流筒端部接触，当复位弹簧处于自然状态时，冷冻气流导管上的进流口和进流筒上的导管接口错位设置。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.

所述复位弹簧材料为镍合金或奥氏体304不锈钢。The return spring material is nickel alloy or austenitic 304 stainless steel.

所述除颤仪还包括把手，所述把手为长条状结构，中间设置有连接孔；所述连接孔和回流体的回流导向管靠近回流转接头一端通过键槽配合，所述把手朝向冷冻帽一侧设置有四个手持凹槽，四个所述手持凹槽关于连接孔对称设置；所述把手位于所述隔温管和防护罩之间。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.

所述冷冻帽前端端部呈圆形内凹状。The front end of the freezing cap is in a circular concave shape.

所述冷冻帽的材料为304不锈钢、301不锈钢、钛及钛合金或钴基合金。The material of the freezing cap is 304 stainless steel, 301 stainless steel, titanium and titanium alloy or cobalt-based alloy.

所述导流管为柔性导管。The guide tube is a flexible conduit.

本发明的有益效果为：本发明的心脏外科冷冻除颤仪作用在心脏的左心耳处，冷冻帽是直接接触左心耳的结构，本发明采用导热速度较快且对人体组织友好型的金属元件，通过螺纹与回流导向管联接。实现作用后的冷冻气及时回流，冷冻帽前端呈圆形内凹状，根据左心耳的形状进行设计，能够大面积的接触到左心耳，提高作用率。极寒冷气体从冷冻气流导管涌入，从出流口喷出，喷到冷冻帽上，使冷冻帽迅速降温，达到迅速降温的目的。喷流的极寒气体从回流槽流回。流回的冷冻气经防护罩上的蛇形通道排出，蛇形通道的设计可以增加冷冻气在除颤仪内部的流动时间，保证排出的冷冻气不会对操作者造成损伤，在回流导向管的外壁，套着一层隔温管，防止在操作过程中把正常的组织冻伤。本发明整体结构简单，操作方便，通过瞬间冷冻的原理治疗房颤，价格低廉，易于控制，对人体组织伤害相对较小，让左心耳“冷静”下来不要异常放电。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.

附图说明Description of drawings

图1为本发明的心脏外科冷冻除颤仪整体结构示意图；1 is a schematic diagram of the overall structure of the cardiac surgery cryo-defibrillator of the present invention;

图2为本发明的心脏外科冷冻除颤仪中作用隐藏冷冻帽结构示意图；Fig. 2 is a schematic diagram of the structure of a hidden freezing cap in the cardiac surgery cryo-defibrillator of the present invention;

图3为本发明的心脏外科冷冻除颤仪中过隐藏防护罩结构示意图；3 is a schematic structural diagram of an over-hidden protective cover in the cardiac surgery cryo-defibrillator of the present invention;

图4为本发明的心脏外科冷冻除颤仪结构剖视图；4 is a structural cross-sectional view of a cardiac surgery cryo-defibrillator of the present invention;

其中：1、冷冻气流导管，101、出流口，102、进流口，103、导向面，2、进流调整结构，201、进流筒，202、导管接口，203、复位弹簧，3、回流体，301、回流导向管，302、回流槽，303、回流转接头，304、回流出口，305、防护罩，306、罩体，307、回流排出体，308、蛇形通道，4、冷冻帽，5、隔温管，6、导流管，7、把手，701、手持凹槽，8、外部冷冻气供给设备。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.

具体实施方式Detailed ways

下面结合附图对本发明的实施方式作进一步说明。The embodiments of the present invention will be further described below with reference to the accompanying drawings.

参见附图1-附图4，本发明的心脏外科冷冻除颤仪包括：Referring to accompanying drawings 1-4, the cardiac surgery cryo-defibrillator of the present invention includes:

冷冻气流导管1，所述冷冻气流导管1为筒状结构，所述冷冻气流导管1一端端部开口作为出流口101；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 anoutlet 101;

和所述冷冻气流导管1另一端连接的进流调整结构2，所述进流调整结构2通过导流管6和外部冷冻气供给设备8连接，通过进流调整结构2调整流入冷冻气流导管1中的冷冻气的量；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 refrigeratedgas supply equipment 8 through theguide 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;

同轴设置在所述冷冻气流导管1外的回流体3；Areturn fluid 3 coaxially arranged outside the refrigerated airflow conduit 1;

以及和所述回流体3靠近冷冻气流导管1的出流口101一端可拆卸密封连接的冷冻帽4，所述冷冻帽4内部通过冷冻气流导管1的出流口101和冷冻气流导管1内部连通，所述冷冻帽4内的冷冻气通过回流体3由靠近冷冻帽4一端传输至远离冷冻帽4一端。冷冻帽4和回流体3的连接采用锥管螺纹连接保证密封。And the freezing cap 4 that is detachably and hermetically connected with thereturn fluid 3 near theoutlet 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 theoutlet 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 thereturn fluid 3 . The connection between the freezing cap 4 and thereturn fluid 3 adopts a conical pipe thread connection to ensure sealing.

所述除颤仪还包括同轴套在所述回流体3外侧的隔温管5，所述隔温管5靠近冷冻帽4一端的端部与所述冷冻帽4的端部接触。The defibrillator further includes aninsulating tube 5 coaxially sleeved on the outside of thereturn fluid 3 , and the end of theinsulating tube 5 close to one end of the freezing cap 4 is in contact with the end of the freezing cap 4 .

所述回流体3包括：Thereturn fluid 3 includes:

同轴套在所述冷冻气流导管1外的回流导向管301，所述回流导向管301内表面圆周均布多个沿轴线方向的回流槽302，所述回流槽302由回流导向管301的一端延伸至另一端；所述冷冻帽4和所述回流导向管301的一端螺纹连接，并与回流槽302连通；Areturn guide tube 301 is coaxially sleeved outside the refrigerated airflow conduit 1 , the inner surface of thereturn guide tube 301 is evenly distributed with a plurality ofreturn grooves 302 along the axis direction, and thereturn groove 302 is formed by one end of thereturn guide tube 301 extend to the other end; the freezing cap 4 is screwed with one end of thereturn guide tube 301 and communicated with thereturn groove 302;

以及和所述回流导向管301另一端可拆卸密封连接的回流转接头303，所述回流转接头303设置有回流出口304，所述回流出口304和所述回流槽302连通。回流转接头303内是一个环腔形结构，平面加工精度高保证不泄露氮气。and abackflow adapter 303 detachably and sealedly connected to the other end of thebackflow guide tube 301 , thebackflow adapter 303 is provided with abackflow outlet 304 , and thebackflow outlet 304 communicates with thebackflow tank 302 . The inside of thereturn adapter 303 is a ring cavity structure, and the plane machining precision is high to ensure that no nitrogen leaks.

所述回流体3还包括防护罩305，所述防护罩305包括同轴套在所述回流转接头303外的筒状的罩体306以及和所述罩体306一体连接的回流排出体307，所述回流排出体307内设置有蛇形通道308，即往复排列的通道，增加冷冻气在除颤仪内部的流动时间，所述蛇形通道308位于防护罩305内部的一端和回流转接头303的回流出口304连通，蛇形通道308的另一端与外界连通；所述罩体306内表面加工有配合定位面，所述冷冻气流导管1对应位置设置有导向面103，所述配合定位面和导向面103配合限制所述罩体306相对所述冷冻气流导管1转动。Thereturn fluid 3 further includes aprotective cover 305, and theprotective cover 305 includes acylindrical cover 306 coaxially sleeved outside thereturn adapter 303 and areturn discharge body 307 integrally connected with thecover 306, Thebackflow discharge body 307 is provided with aserpentine channel 308, that is, a reciprocating channel to increase the flow time of the frozen gas inside the defibrillator. Theserpentine channel 308 is located at one end of theprotective cover 305 and thebackflow adapter 303. Thebackflow outlet 304 of the refrigerated airflow is connected, and the other end of theserpentine channel 308 is communicated with the outside; Theguide surface 103 cooperates to limit the rotation of thecover body 306 relative to the refrigerated airflow duct 1 .

所述进流调整结构2包括：The inflow adjustment structure 2 includes:

套在所述冷冻气流导管1远离出流口101一端并相对冷冻气流导管1滑动配合的进流筒201，所述进流筒201侧壁通过一个导管接口202和导流管6连通，所述冷冻气流导管1远离出流口101一端密封设置，冷冻气流导管1靠近密封设置一端的侧壁设置有和内部连通的进流口102，所述进流口102为长条状刻槽；所述进流筒201外部和所述防护罩305的罩体306内表面滑动配合；Theinflow cylinder 201 is sleeved on one end of the refrigerated airflow conduit 1 away from theoutflow port 101 and is slidably matched with respect to the refrigerated airflow conduit 1. One end of the refrigerated airflow duct 1 away from theoutlet 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 aninlet 102 that communicates with the inside, and theinlet 102 is a long strip groove; the The outside of theinflow cylinder 201 is slidably fitted with the inner surface of thecover body 306 of theprotective cover 305;

以及设置在所述进流筒201内的复位弹簧203，所述复位弹簧203一端和冷冻气流导管1端部接触，另一端和进流筒201端部接触，当复位弹簧203处于自然状态时，冷冻气流导管1上的进流口102和进流筒201上的导管接口202错位设置。向内推动进流筒201，进流筒201相对冷冻气流导管1重合量增大，压缩复位弹簧203，进而调整冷冻气流导管1上的进流口102和进流筒201上的导管接口202的重合量。And thereturn spring 203 arranged in theinflow cylinder 201, one end of thereturn 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 theinflow cylinder 201. When thereturn spring 203 is in a natural state, Theinflow port 102 on the refrigerated airflow conduit 1 and theconduit interface 202 on theinflow cylinder 201 are arranged in a staggered position. Push theinflow cylinder 201 inward, theinflow cylinder 201 increases the overlap relative to the refrigerated airflow duct 1, compresses thereturn spring 203, and then adjusts theinflow port 102 on the refrigerated airflow duct 1 and theduct interface 202 on theinflow cylinder 201. amount of overlap.

所述复位弹簧203为抗低温弹簧，材料为镍合金或奥氏体304不锈钢。Thereturn spring 203 is an anti-low temperature spring, and the material is nickel alloy or austenitic 304 stainless steel.

所述除颤仪还包括把手7，所述把手7为长条状结构，中间设置有连接孔；所述连接孔和回流体3的回流导向管301靠近回流转接头303一端通过键槽配合，所述把手7朝向冷冻帽4一侧设置有四个手持凹槽701，四个所述手持凹槽701关于连接孔对称设置；所述把手7位于所述隔温管5和防护罩305之间。The defibrillator also includes a handle 7, which is a long strip structure with a connection hole in the middle; the connection hole and thereturn guide tube 301 of thereturn fluid 3 are matched with one end of thereturn adapter 303 through a key slot, so The handle 7 is provided with four hand-heldgrooves 701 on the side facing the freezing cap 4 , and the four hand-heldgrooves 701 are symmetrically arranged with respect to the connecting hole;

所述冷冻帽4前端端部呈圆形内凹状。The front end of the freezing cap 4 is in a circular concave shape.

所述冷冻帽4的材料为304不锈钢、301不锈钢、钛及钛合金或钴基合金。The material of the freezing cap 4 is 304 stainless steel, 301 stainless steel, titanium and titanium alloy or cobalt-based alloy.

所述导流管6为柔性导管。Theguide tube 6 is a flexible conduit.

本发明的冷冻气采用的是极寒氮气，外部冷冻气供给设备8为液氮储藏控制柜，主要控制配出的氮气的气温以及流速。本发明可以采用在液氮罐作为外部冷冻气供给设备8，液氮罐上连接液氮温度控制器，调整液氮罐输出的温度，液氮温度控制器可以采用专利号CN201621128434.0公开的技术方案。本发明采用液氮冷气团冻结左心耳达到心房除颤的目的，达到治疗效果。The refrigerated gas of the present invention adopts extremely cold nitrogen gas, and the external refrigeratedgas 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 refrigeratedgas 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.

使用本发明的具体过程为：首先要保证外部冷冻气供给设备8内还有液氮，打开阀门，调节好温度。把器械进行全面的消毒处理，准备外科手术。待医生开刀打开伤口后，直接把冷冻帽4贴到心脏左心耳处。四指按住把手7上对应的手持凹槽701，大拇指按住后面的进流筒201末端，逐渐施加力，这时，极寒氮气会迅速从外部冷冻气供给设备8喷涌而出，通过导流管6，进入冷冻气流导管1，气体会迅速喷涌至冷冻帽4，冷冻帽4为金属薄壁元件，冷冻帽4迅速冷却。使左心耳“安静下来”，治疗房颤。冷气流从回流槽302流回去，在回流转接头303处释放。为防止流出来的气流冻伤医护人员的手，在回流转接头303出来的气体被防护罩305挡住，在内部“徘徊”排出。在医生手术完成后，只需松开进流筒201，在复位弹簧203的作用下，进流筒201相对向后运行，导管接口202和冷冻气流导管1的进流口102错开，停止向冷冻气流导管1内供气，四指迅速把住把手7拔出，关闭外部冷冻气供给设备8即可，整个操作过程简单，易掌握。The specific process of using the present invention is as follows: first, ensure that there is still liquid nitrogen in the external refrigeratedgas 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-heldgroove 701 on the handle 7, and the thumb presses the end of theinflow cylinder 201 at the rear, and gradually exerts force. Theguide 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 thereturn tank 302 and is released at thereturn adapter 303 . In order to prevent the outflowing air from frostbiting the hands of the medical staff, the air coming out of thereturn adapter 303 is blocked by theprotective cover 305, and "wanders" inside to be discharged. After the surgeon completes the operation, he only needs to release theinflow cylinder 201. Under the action of thereturn spring 203, theinflow cylinder 201 runs relatively backward, and theconduit interface 202 and theinflow 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 refrigerationgas 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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