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Low temperature duct and low temperature control system

A control system and total control system technology, applied in the field of medical devices, can solve the problems of easy neutralization of low-temperature blood flow, failure to achieve cooling effect, limited proportion of patients, etc., to reduce irritation and reduce the possibility of vasospasm. Effect

Pending Publication Date: 2019-12-03
XUANWU HOSPITAL OF CAPITAL UNIV OF MEDICAL SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to restrictions such as strict indications for endovascular treatment, the proportion of patients who can actually receive vascular recanalization in clinical practice is very limited
In addition, data show that even with effective recanalization therapy, the proportion of patients who are functionally independent at 90 days after surgery is less than 50%, and the mortality rate is still as high as about 15%.
[0007] (2) Compared with the multi-heat balloon heat exchange technology, the hot balloon heat exchange cryogenic catheter often has a larger catheter diameter (because it is covered with multiple balloons), resulting in an excessively large catheter diameter, so the intubation position is limited only It can be inserted into the large arteries, further causing the initial point of cooling to be too far away from the cerebral infarction area, so that the low temperature blood flow is easily neutralized and the cooling effect cannot be achieved
However, although the cryogenic catheter can achieve the purpose of local cooling, it cannot precisely control the temperature of the target area.

Method used

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  • Low temperature duct and low temperature control system
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  • Low temperature duct and low temperature control system

Examples

Experimental program
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Effect test

Embodiment 1

[0042] figure 1 Shown is the overall schematic diagram of the cryogenic conduit in this embodiment; refer to Figure 2-Figure 4 ( Figure 2-Figure 4Part of the structure of the inlet end of the cryogenic conduit is hidden), the present embodiment provides a cryogenic conduit, including a conduit body 10, and a parallel first pipeline 11, a second pipeline 12, and a return pipeline 13 are formed in the conduit body 10. One end of the conduit body 10 is formed with a heat-absorbing cavity 14, and the first pipeline 11, the second pipeline 12 and the return pipeline 13 are all communicated with the heat-absorbing cavity 14; the first pipeline 11 is used to transport the first reaction liquid , the second pipeline 12 is used to transport the second reaction liquid, and the first reaction liquid and the second reaction liquid are mixed in the heat-absorbing chamber 14 and flow back through the return pipe 13 . Wherein, after the first reaction liquid and the second reaction liqui...

Embodiment 2

[0047] combine Figure 5-Figure 7 ( Figure 5-Figure 7 Part of the structure of the inlet end of the cryogenic conduit is hidden), this embodiment provides a cryogenic conduit, the difference from the first embodiment is the structural shape of the first pipeline 11 , the second pipeline 12 and the return pipeline 13 . Specifically: the cross section of the catheter body 10 is circular, and the cross sections of the first pipe 11 , the second pipe 12 and the return pipe 13 are all circular.

[0048] There may be various specific shapes of each pipe, which will not be repeated here. It should be noted Figure 2-Figure 7 The various views of the cryogenic conduit shown are only schematic, and the actual length of the cryogenic conduit should be designed according to actual requirements. The length shown in the figure does not represent the actual length of the cryogenic catheter, figure 1 It is the overall schematic diagram of the cryogenic conduit, and the inlet end of the ...

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Abstract

The invention provides a low temperature duct and a low temperature control system. The low temperature duct comprises a duct body (10), wherein a first pipeline (11), a second pipeline (12) and a reflux pipeline (13) which are arranged in parallel are arranged in the duct body (10); a heat absorbing cavity (14) is formed in one end of the duct body (10); the first pipeline (11), the second pipeline (12) and the reflux pipeline (13) communicate with the heat absorbing cavity (14); the first pipeline (11) is used for transporting first reaction fluid; the second pipeline (12) is used for transporting second reaction fluid; after being mixed in the heat absorbing cavity (14), the first reaction fluid and the second reaction fluid are subjected to reflux in the reflux pipeline (13); and afterthe first reaction fluid and the second reaction fluid are mixed, an endothermic reaction can be generated. According to the low temperature duct disclosed by the invention, only after the first reaction fluid and the second reaction fluid are mixed, the endothermic reaction can be generated, so that the low temperature duct only produces a low temperature range in the heat absorbing cavity (14),the stimulation to vascular walla is reduced, and the possibility of generating vasospasm is reduced.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a low-temperature catheter and a low-temperature control system. Background technique [0002] Acute ischemic stroke is a common disease with high morbidity and mortality. In 2015, the results of a number of large clinical studies published in the New England Journal of Medicine confirmed that endovascular therapy is superior to drug therapy alone for patients with acute ischemic stroke caused by large vessel occlusion. However, due to restrictions such as strict indications for endovascular treatment, the proportion of patients who can actually receive vascular recanalization in clinical practice is very limited. In addition, data show that even with effective recanalization therapy, the proportion of functional independence of patients at 90 days after surgery is less than 50%, and the mortality rate is still as high as about 15%. The reason for this phenomenon is related to th...

Claims

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Application Information

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IPC IPC(8): A61B18/02
CPCA61B18/02A61B2018/00714A61B2018/0212A61B2018/00791A61B2018/00863A61B2018/00023A61B2018/00404
Inventor 吉训明李明尹志臣丁玉川姜缪文高原吴川杰吴隆飞鲍路姿
Owner XUANWU HOSPITAL OF CAPITAL UNIV OF MEDICAL SCI