WO2021093136A1 - 心脏外科冷冻除颤仪 - Google Patents

心脏外科冷冻除颤仪 Download PDF

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Publication number
WO2021093136A1
WO2021093136A1 PCT/CN2020/000278 CN2020000278W WO2021093136A1 WO 2021093136 A1 WO2021093136 A1 WO 2021093136A1 CN 2020000278 W CN2020000278 W CN 2020000278W WO 2021093136 A1 WO2021093136 A1 WO 2021093136A1
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Prior art keywords
freezing
return
refrigerating
guide tube
cap
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PCT/CN2020/000278
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English (en)
French (fr)
Inventor
马大实
陈延礼
程延耕
白杨
孙孟尧
罗松松
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吉林大学第一医院
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Publication of WO2021093136A1 publication Critical patent/WO2021093136A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
    • A61B2018/0212—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques using an instrument inserted into a body lumen, e.g. catheter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
    • A61B2018/0231—Characteristics of handpieces or probes
    • A61B2018/0262—Characteristics of handpieces or probes using a circulating cryogenic fluid

Definitions

  • the invention belongs to the technical field of medical devices, and specifically relates to a cardiac surgery cryodefibrillator.
  • the purpose of the present invention is to provide a cryo-defibrillator for cardiac surgery, which solves the problems of easy burn tissue, disability and thrombosis risk existing in the motor therapy method existing in the prior art.
  • the cryodefibrillator for cardiac surgery of the present invention includes:
  • a refrigerated airflow conduit the refrigerated airflow conduit has a cylindrical structure, and one end of the refrigerated airflow conduit is opened as an outflow port;
  • An inlet flow adjustment structure connected to the other end of the refrigerated airflow duct, the inlet flow adjustment structure is connected to an external refrigerating gas supply device through a flow guide tube, and the amount of refrigerated air flowing into the refrigerated airflow duct is adjusted through the inlet flow adjustment structure;
  • the return fluid coaxially arranged outside the refrigerating airflow duct;
  • a freezing cap that is detachably and sealedly connected to the end of the return fluid close to the outlet of the refrigerating airflow conduit, the inside of the refrigerating cap communicates with the inside of the refrigerating airflow conduit through the outflow port of the refrigerating airflow conduit, and the refrigeration in the freezing cap The gas is transferred from the end close to the freezing cap to the end far away from the freezing cap through the return fluid.
  • the defibrillator also includes a temperature isolating tube coaxially sheathed outside the return fluid, and an end of the temperature isolating tube close to one end of the freezing cap is in contact with the end of the freezing cap.
  • the return fluid includes:
  • a reflux guide tube coaxially sleeved outside the refrigerated airflow conduit, a plurality of reflux grooves along the axial direction are evenly distributed on the inner surface of the reflux guide tube, and the reflux grooves extend from one end to the other end of the reflux guide tube;
  • the freezing cap is threadedly connected with one end of the reflux guide pipe, and communicates with the reflux groove;
  • a backflow adapter that is detachably and sealedly connected to the other end of the backflow guide pipe, the backflow adapter is provided with a backflow outlet, and the backflow outlet is in communication with the backflow tank.
  • the return fluid further 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, and the return discharge body is provided with A serpentine channel, one end of the serpentine channel located inside the protective cover communicates with the return outlet of the return adapter, and the other end of the serpentine channel communicates with the outside; the inner surface of the cover is processed with a matching positioning surface, and the refrigerated airflow duct The corresponding position is provided with a guide surface, 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 inlet cylinder sleeved at one end of the refrigerating airflow duct away from the outlet and slidingly fitted with the refrigerating airflow duct.
  • the sidewall of the inlet cylinder is communicated with the draft tube through a duct interface, and the refrigerating airflow duct is far away from the outlet port.
  • One end is sealed, the side wall of the refrigerating airflow conduit close to the sealed end is provided with an inlet communicating with the inside, and the outside of the inlet cylinder and the inner surface of the protective cover are slidingly fitted;
  • a return spring arranged in the inlet cylinder, one end of the return spring is in contact with the end of the refrigerating airflow duct, and the other end is in contact with the end of the inlet cylinder.
  • the return spring material is nickel alloy or austenitic 304 stainless steel.
  • the defibrillator also includes a handle, the handle is a long strip structure with a connecting hole in the middle; the connecting hole and the return flow guide tube close to the return adapter are fitted with a key groove at one end, and the handle faces the freezing cap
  • Four hand-held grooves are arranged on one side, and the four hand-held grooves are symmetrically arranged with respect to the connecting hole; the handle is located between the temperature-insulating tube and the protective cover.
  • the front end of the freezing cap is circular and concave.
  • the material of the freezing cap is 304 stainless steel, 301 stainless steel, titanium and titanium alloy or cobalt-based alloy.
  • the diversion tube is a flexible conduit.
  • the cardiac surgery cryodefibrillator 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
  • the present invention uses metal elements that conduct heat quickly and are friendly to human tissues.
  • the refrigerated gas after the effect is returned in time, and the front end of the refrigerating cap is round 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.
  • Extremely cold gas flows in from the refrigerating airflow duct, sprays out from the outlet, and sprays onto the freezing cap, so that the freezing cap can be cooled quickly to achieve the purpose of rapid cooling.
  • the jet of extremely cold gas flows back from the reflux tank.
  • the refrigerated gas flowing back is discharged through the serpentine channel on the protective cover.
  • the design of the serpentine channel can increase the flow time of the refrigerated gas inside the defibrillator, ensuring that the discharged refrigerating gas will not cause damage to the operator.
  • the outer wall is sheathed with a layer of insulating tube to prevent frostbite to normal tissues during operation.
  • the invention has simple overall structure and convenient operation. It treats atrial fibrillation through the principle of instant freezing, is low in price, easy to control, has relatively little damage to human tissues, and allows the left atrial appendage to "calm down" without abnormal discharge.
  • FIG. 1 is a schematic diagram of the overall structure of the cryodefibrillator for cardiac surgery of the present invention
  • FIG. 2 is a schematic diagram of the structure of the concealed freezing cap in the cryodefibrillator for cardiac surgery of the present invention
  • Fig. 3 is a schematic diagram of the structure of the hidden protective cover in the cryodefibrillator for cardiac surgery of the present invention
  • FIG. 4 is a cross-sectional view of the structure of the cryodefibrillator for cardiac surgery of the present invention
  • refrigerating air duct 101, outlet, 102, inlet, 103, guide surface, 2, inlet adjustment structure, 201, inlet cylinder, 202, duct interface, 203, return spring, 3.
  • Return fluid 301, return guide pipe, 302, return tank, 303, return adapter, 304, return outlet, 305, protective cover, 306, cover, 307, return discharge body, 308, serpentine channel, 4. Freezing Cap, 5.
  • the cryodefibrillator for cardiac surgery of the present invention includes:
  • the refrigerated airflow conduit 1 has a cylindrical structure, and one end of the refrigerated airflow conduit 1 is opened as an outflow port 101;
  • the inlet flow adjusting structure 2 connected to the other end of the refrigerating airflow duct 1 is connected to the external refrigerating air supply device 8 through the guide tube 6 and the inlet flow adjusting structure 2 adjusts the inlet refrigerating airflow duct 1 The amount of refrigerated gas in;
  • the return fluid 3 coaxially arranged outside the refrigerated airflow conduit 1;
  • a freezing cap 4 that is detachably and hermetically connected with the return fluid 3 near the outlet 101 of the refrigerating airflow conduit 1, and the inside of the refrigerating cap 4 is in communication with the inside of the refrigerating airflow conduit 1 through the outflow port 101 of the refrigerating airflow conduit 1.
  • the refrigerated gas in the freezing cap 4 is transferred from the end close to the freezing cap 4 to the end far away from the freezing cap 4 through the return fluid 3.
  • the connection between the freezing cap 4 and the return fluid 3 adopts a tapered pipe threaded connection to ensure sealing.
  • the defibrillator also includes a temperature isolating tube 5 coaxially sheathed outside the return fluid 3, and the end of the temperature isolating 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 coaxially sleeved outside the refrigerating airflow duct 1.
  • a plurality of return grooves 302 in the axial direction are evenly distributed on the inner surface of the return guide tube 301.
  • the return grooves 302 are formed by one end of the return guide tube 301. Extend to the other end; the freezing cap 4 and one end of the reflux guide tube 301 are threadedly connected and communicate with the reflux groove 302;
  • a backflow adapter 303 that is 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 is in communication with the backflow tank 302.
  • the plane processing accuracy is high to ensure that there is no leakage of nitrogen.
  • the return fluid 3 further includes a protective cover 305 which 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 reflux discharge body 307 is provided with a serpentine channel 308, that is, a reciprocating channel to increase the flow time of the refrigerated gas inside the defibrillator.
  • the serpentine channel 308 is located at one end of the protective cover 305 and the return adapter 303
  • the reflux outlet 304 is connected, the other end of the serpentine channel 308 is in communication with the outside;
  • the inner surface of the cover 306 is processed with a matching positioning surface
  • the refrigerating airflow duct 1 is provided with a guide surface 103 at a corresponding position, the matching positioning surface and
  • 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:
  • An inlet cylinder 201 sleeved on the end of the refrigerating airflow duct 1 away from the outflow port 101 and slidingly fitted relative to the refrigerating airflow duct 1.
  • the refrigerating airflow conduit 1 is sealed at one end away from the outflow port 101, and the sidewall of the refrigerating airflow conduit 1 close to the sealed end is provided with an inlet 102 communicating with the inside, and the inlet 102 is a long strip groove;
  • the outside of the inlet cylinder 201 is in sliding fit with the inner surface of the cover body 306 of the protective cover 305;
  • a return spring 203 arranged in the inlet cylinder 201.
  • One end of the return spring 203 is in contact with the end of the refrigerating airflow duct 1, and the other end is in contact with the end of the inlet cylinder 201.
  • the inlet 102 on the refrigerating airflow duct 1 and the duct interface 202 on the inlet cylinder 201 are arranged in a staggered manner.
  • the return spring 203 is a low temperature resistant 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 connecting hole in the middle; the connecting hole and the return flow guide tube 301 of the return fluid 3 are close to the return adapter 303 at one end through a key groove, 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 handle 7 is located between the temperature insulating tube 5 and the protective cover 305.
  • the front end of the freezing cap 4 is circular and concave.
  • 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 tube.
  • the refrigerating gas of the present invention adopts extremely cold nitrogen gas
  • the external refrigerating gas supply device 8 is a liquid nitrogen storage control cabinet, which mainly controls the temperature and flow rate of the nitrogen gas.
  • a liquid nitrogen tank can be used as the external refrigerating gas supply device 8
  • a liquid nitrogen temperature controller is connected to the liquid nitrogen tank to adjust the temperature of the liquid nitrogen tank output.
  • the liquid nitrogen temperature controller can adopt the technology disclosed in patent number CN201621128434.0 Program.
  • the invention adopts 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, it is necessary to ensure that there is liquid nitrogen in the external refrigerating gas supply device 8, open the valve, and adjust the temperature.
  • the instruments are thoroughly disinfected and prepared for surgery. After the doctor opens the wound, directly stick the freezing cap 4 to the left atrial appendage of the heart. Press the corresponding holding groove 701 on the handle 7 with four fingers, press the end of the inlet cylinder 201 with your thumb, and gradually apply force.
  • the extremely cold nitrogen gas will quickly gush out from the external refrigerating gas supply device 8 and pass through The guide tube 6 enters the refrigerating airflow conduit 1, and the gas will quickly spray to the freezing cap 4.
  • the freezing cap 4 is a metal thin-walled element, and the freezing cap 4 is rapidly cooled. "Quiet" 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.
  • the gas from the return adapter 303 is blocked by the protective cover 305, and "wanders" and is discharged inside.
  • the doctor completes the operation, he only needs to loosen the inlet cylinder 201. Under the action of the return spring 203, the inlet cylinder 201 runs relatively backward.
  • the catheter interface 202 and the inlet 102 of the refrigerating airflow duct 1 are staggered to stop the refrigeration.
  • the air supply pipe 1 supplies air, and the four fingers quickly pull out the handle 7 and turn off the external refrigerating air supply device 8. The entire operation process is simple and easy to master.

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Abstract

一种心脏外科冷冻除颤仪，包括：冷冻气流导管（1），冷冻气流导管（1）为筒状结构，冷冻气流导管（1）一端端部开口作为出流口（101）；和冷冻气流导管（1）另一端连接的进流调整结构（2），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；同轴设置在冷冻气流导管（1）外的回流体（3）；以及和回流体（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），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，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。

Description

心脏外科冷冻除颤仪 技术领域
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。
背景技术
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。
发明内容
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。
为实现上述目的，本发明的心脏外科冷冻除颤仪包括：
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；
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；
同轴设置在所述冷冻气流导管外的回流体；
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。
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。
所述回流体包括：
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；
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。
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。
所述进流调整结构包括：
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；
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。
所述复位弹簧材料为镍合金或奥氏体304不锈钢。
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。
所述冷冻帽前端端部呈圆形内凹状。
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。
所述导流管为柔性导管。
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。
附图说明
图1为本发明的心脏外科冷冻除颤仪整体结构示意图；
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；
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；
图4为本发明的心脏外科冷冻除颤仪结构剖视图；
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。
具体实施方式
下面结合附图对本发明的实施方式作进一步说明。
参见附图1-附图4，本发明的心脏外科冷冻除颤仪包括：
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；
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；
同轴设置在所述冷冻气流导管1外的回流体3；
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。
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。
所述回流体3包括：
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；
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。
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。
所述进流调整结构2包括：
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；
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。
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。
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。
所述冷冻帽4前端端部呈圆形内凹状。
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。
所述导流管6为柔性导管。
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。
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。

Claims (10)

  1. 心脏外科冷冻除颤仪，其特征在于，包括：
    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)；
    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；
    同轴设置在所述冷冻气流导管(1)外的回流体(3)；
    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。
  2. 根据权利要求1所述的心脏外科冷冻除颤仪，其特征在于，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。
  3. 根据权利要求1或2所述的心脏外科冷冻除颤仪，其特征在于，所述回流体(3)包括：
    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；
    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。
  4. 根据权利要求3所述的心脏外科冷冻除颤仪，其特征在于，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)，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。
  5. 根据权利要求4所述的心脏外科冷冻除颤仪，其特征在于，所述进流调整结构(2)包括：
    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)，所述进流筒(201)外部和所述防护罩(305)的罩体(306)内表面滑动配合；
    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。
  6. 根据权利要求5所述的心脏外科冷冻除颤仪，其特征在于，所述复位弹簧(203)材料为镍合金或奥氏体304不锈钢。
  7. 根据权利要求4所述的心脏外科冷冻除颤仪，其特征在于，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)位于隔温管(5)和防护罩(305)之间。
  8. 根据权利要求1所述的心脏外科冷冻除颤仪，其特征在于，所述冷冻帽(4)前端端部呈圆形内凹状。
  9. 根据权利要求1或8所述的心脏外科冷冻除颤仪，其特征在于，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。
  10. 根据权利要求1所述的心脏外科冷冻除颤仪，其特征在于，所述导流管(6)为柔性导管。
PCT/CN2020/000278 2019-11-15 2020-11-12 心脏外科冷冻除颤仪 WO2021093136A1 (zh)

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