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Self-pressurizing cryoablation system controlled by PID

A self-pressurization and controller technology, which is applied in the direction of cooling surgical instruments, surgical instrument parts, medical science, etc., can solve the problems of increasing the difficulty of installation and operation of the cryoablation system, large space, etc., to avoid pressurization and adjustment difficulties , High controllability, precise and controllable pressure effect

Pending Publication Date: 2019-03-08
CRYOFOCUS MEDTECH (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The refrigerant in this patent comes from an external gas tank, and the installation of the external gas tank requires a large space, which increases the difficulty of installation and operation of the cryoablation system

Method used

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  • Self-pressurizing cryoablation system controlled by PID
  • Self-pressurizing cryoablation system controlled by PID
  • Self-pressurizing cryoablation system controlled by PID

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 , 2 As shown in and 3, the PID-controlled self-pressurized cryoablation system of the present invention includes a cryoablation device 1 and a cryoablation catheter 2, and the cryoablation device 1 includes a housing 11, a control unit 12, a vacuum unit 13 and a delivery unit 14 . The conveying unit 14 includes a gas source manufacturing device 141, a gas path control device 142, a low-temperature conversion device 143, and an equipment connector 144 connected in sequence, and the gas outlet end of the equipment connector 144 and the vacuum unit 13 are connected to the vacuum unit 13 respectively. The cryoablation catheter 2 is in fluid communication, the low temperature conversion device 143 includes a Dewar vessel 1431 and a heat exchanger 1432, the gas source manufacturing device 141 is arranged in the Dewar bottle 1431, and the gas source manufacturing device 141 The air outlet end of the gas path control device 142 is in fluid communication with ...

Embodiment 2

[0033] Such as Figure 4 , 5 As shown in and 6, this embodiment is based on the first embodiment, and the only difference from the first embodiment is that the structure of the heat exchanger 1432 is different. Such as Figure 4 As shown, the heat exchanger 1432 is a spiral tube structure, which increases the heat exchange area between the gaseous coolant and the coolant in the Dewar 1431, and the spiral tube structure can effectively reduce the flow of the coolant in the heat exchanger 1432. flow resistance within; Figure 5 As shown, the heat exchanger 1432 is a horizontal serpentine tube structure, which increases the heat exchange area for energy exchange between the gaseous coolant and the liquid coolant in the Dewar bottle 1431, and can reduce the heat exchange rate of the heat exchanger in the Dewar bottle 1431 as much as possible. Inner space consumption, improve system compactness; such as Figure 6 As shown, the heat exchanger 1432 is a vertical serpentine tube s...

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Abstract

The invention relates to a self-pressurizing cryoablation system controlled by PID, which comprises cryoablation equipment and a cryoablation catheter, wherein the cryoablation equipment comprises a control unit, a vacuum unit and a delivery unit; the delivery unit comprises an air source manufacturing device, an air path control device, a low-temperature conversion device and an equipment connecting piece which are sequentially connected; an air outlet end of the equipment connecting piece and the vacuum unit are respectively communicated with the cryoablation catheter; the low-temperature conversion device comprises a Dewar bottle and a heat exchanger, the air source manufacturing device is arranged in the Dewar bottle, the air outlet end of the air source manufacturing device is communicated with an air inlet end of the air path control device; the air source manufacturing device comprises a coolant storage tank, a pressure relief valve communicated with the coolant storage tank, acoolant supplement joint communicated with the coolant storage tank and a heating device arranged in the coolant storage tank; the control unit comprises a PID controller, and the heating device is electrically connected with the PID controller; and a large and heavy pressurized gas tank is not required to be externally connected, so that a space of the cryoablation equipment is saved.

Description

technical field [0001] The invention relates to the field of cryoablation, in particular to a PID-controlled self-pressurized cryoablation system. Background technique [0002] Cryosurgical treatment is the use of extremely low temperatures and a complex system designed to properly freeze the target biological tissue to be treated. Many of these systems use working fluid from external high-pressure gas tanks connected to the cryoablation catheter through long flexible delivery tubing. These tanks usually have a large internal volume to hold enough working fluid to ensure a typical Cryosurgery procedure. Gas tanks are usually made of steel with very thick walls, which can meet the requirements of high pressure resistance, but at the same time make the gas tanks very bulky. Due to the large size and high pressure required, pressurized gas tanks are generally placed in the freezer The exterior of the ablation unit complicates installation and operation of the system. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B18/02
CPCA61B18/02A61B2018/00714A61B2018/00642A61B2018/00589A61B2018/0212A61B2018/0262
Inventor 刁月鹏赵奎文姚佳陈陈熙
Owner CRYOFOCUS MEDTECH (SHANGHAI) CO LTD
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