Cryogenic ablation device for bronchoscopy

Abstract

The application discloses a low-temperature cryogenic ablation device for a bronchoscope, which comprises a double-layer low-temperature insulation cup, a cup cover and an output pump group arranged at the top and the bottom of the double-layer low-temperature insulation cup respectively, wherein the cup cover is provided with a low-temperature switch valve communicated to the bottom of the double-layer low-temperature insulation cup, and the output pump group is communicated to the double-layer low-temperature insulation cup through a capillary pipeline and outputs the liquid nitrogen in the cup through the low-temperature switch valve by pressurizing the cup. The device has the advantages of compact structure, simple operation and high safety.

Description

Technical Field

[0001] This utility model relates to a technology in the field of medical devices, specifically a low-temperature cryoablation device for bronchoscopes. Background Technology

[0002] Bronchoscopic ablation techniques mainly include radiofrequency ablation, laser ablation, and cryoablation. Among them, cryoablation has gradually gained attention due to its unique advantages. Cryoablation uses extremely low temperatures (such as liquid nitrogen) to rapidly freeze diseased tissue, causing the formation of ice crystals inside and outside cells, cell membrane rupture, and ultimately tissue necrosis. However, existing cryoablation techniques usually require complex refrigeration systems and tubing connections, necessitating a large main unit that cannot be handheld or portable, is difficult to use flexibly with a bronchoscope, requires professional operation, and is difficult to control precisely. Furthermore, excessive pressure or liquid nitrogen leakage during cryoablation can damage the equipment or injure the patient. Utility Model Content

[0003] To address the aforementioned shortcomings of existing technologies, this invention proposes a low-temperature cryoablation device for bronchoscopes, which is compact in structure, easy to operate, and highly safe.

[0004] This utility model is achieved through the following technical solution:

[0005] This utility model relates to a cryogenic cryoablation device for bronchoscopes, comprising: a double-layer cryogenic insulated cup, a cup lid respectively disposed at the top and bottom of the cup, and an output pump assembly, wherein: the cup lid is provided with a cryogenic switch valve connected to the bottom of the double-layer cryogenic insulated cup, and the output pump assembly is connected to the inside of the double-layer cryogenic insulated cup through a capillary tube and outputs liquid nitrogen inside the cup through the cryogenic switch valve by pressurizing the inside of the cup.

[0006] The double-layer cryogenic insulated cup includes: a cryogenic insulated cup outer shell, a cryogenic insulated cup inner container, and a vacuum interlayer located therebetween, wherein: the cup lid is sealed to the top of the cryogenic insulated cup inner container.

[0007] The inner container of the low-temperature insulated cup contains a freezing and melting solution.

[0008] The input and output ends of the aforementioned cryogenic switching valve are respectively connected to the bottom of the double-layer cryogenic insulated cup through the liquid outlet pipe and to the outside of the cup through the quick cryogenic connector.

[0009] The capillary circuit is located outside the double-layer low-temperature insulated cup and its two ends are connected to the cup lid and the output pump group, respectively. Specifically, it includes a straight section of the pressurized gas pipeline and a bend section of the pressurized gas pipeline.

[0010] The cryogenic switching valve includes: an outer cover and a valve seat respectively disposed outside and inside the cup lid, a valve body movably disposed inside the outer cover, and an elastic reset mechanism connected to the valve body, wherein: the liquid outlet pipe passes through the valve seat and the end of the valve body is located in the liquid outlet pipe.

[0011] The valve body includes: a spring, a valve stem, and a valve core arranged vertically in sequence, wherein: the spring is connected to the inner wall of the outer cover, the valve stem is in contact with the elastic reset mechanism, and the end of the valve core is located in the liquid outlet pipe.

[0012] The elastic reset mechanism includes: a lever mechanism disposed inside the outer cover, and a magnetic pair located at one end of the lever mechanism and on the opposite side inside the outer cover. The other end of the lever mechanism is movably connected to the valve stem. The electrically driven magnetic pair controls the attraction or repulsion of the lever mechanism, thereby driving the valve body to rise or fall, and realizing the opening or closing of the liquid outlet pipe. Attached Figure Description

[0013] Figure 1 A schematic diagram of the structure of this utility model;

[0014] In the diagram: 101 Inner container of the cryogenic insulated cup, 102 Vacuum jacket, 103 Outer shell of the cryogenic insulated cup, 104 Straight section of the pressurized gas pipeline, 105 Cable conduit, 106 Handle, 107 Cup lid, 108 Cup mouth thread, 109 Cryogenic sealing ring, 200 Cryogenic switch valve, 300 Cryogenic probe, 400 Electrical compartment, 401 Battery, 402 Controller, 403 Air pump, 501 Electrical switch, 502 Pressure sensor, 503 Level gauge, 504 Safety valve, 505 Check valve, 506 Bend section of the pressurized gas pipeline, 507 Discharge pipe, 508 Quick cryogenic connector;

[0015] Figure 2 Schematic diagram of a cryogenic switching valve;

[0016] In the diagram: 201 Outer cover, 202 Thread, 203 Lever, 204 Magnetic attraction, 205 Electromagnet, 206 Spring, 207 Valve stem, 208 Bellows, 209 Valve core, 210 Airtight pipe, 211 Exhaust port, 212 Valve seat;

[0017] Figure 3 Schematic diagram of a low-temperature probe;

[0018] In the diagram: 301 quick connector, 302 quick connector, 303 atomizing nozzle, 305 low-temperature probe flexible outer tube, 306 low-temperature probe flexible inner tube, 307 contact support, 309 vacuum interlayer. Detailed Implementation

[0019] like Figure 1As shown, this embodiment relates to a cryogenic cryoablation device for bronchoscopy, comprising: a double-layer cryogenic insulated cup, cup lids 107 respectively disposed at the top and bottom of the cup, and an output pump assembly 400, wherein: the cup lid 107 is provided with a cryogenic switch valve 200 connected to the bottom of the double-layer cryogenic insulated cup, and the output pump assembly 400 is connected to the inside of the double-layer cryogenic insulated cup through a capillary tube and outputs liquid nitrogen inside the cup through the cryogenic switch valve 200 by pressurizing the inside of the cup.

[0020] The double-layer cryogenic insulated cup includes: a cryogenic insulated cup outer shell 103, a cryogenic insulated cup inner container 101, and a vacuum interlayer 102 located therebetween, wherein: the cup lid 107 is sealed to the top of the cryogenic insulated cup inner container 101.

[0021] The inner container 101 of the low-temperature insulated cup contains a cryogenic thawing solution.

[0022] The sealing connection is achieved through threads 108 and a low-temperature sealing ring 109 provided on the cup lid 107 and the inner container 101 of the low-temperature insulated cup.

[0023] The input and output ends of the cryogenic switching valve 200 are respectively connected to the bottom of the double-layer cryogenic insulated cup through the liquid outlet pipe 507 and to the outside of the cup through the quick cryogenic connector 508.

[0024] The rapid cryogenic connector 508 is equipped with a cryogenic probe 300.

[0025] The capillary circuit is located outside the double-layer low-temperature insulated cup and its two ends are connected to the cup lid 107 and the output pump group 400, respectively. Specifically, it includes a straight section 104 of the pressurized gas pipeline and a bend section 506 of the pressurized gas pipeline.

[0026] The output pump assembly 400 includes an air pump 403 and a battery 401 and a controller 402 connected thereto.

[0027] The double-layer cryogenic insulated cup is provided with a handle 106 on the outside. The handle 106 is provided with at least one electrical switch 501 connected to the controller 402 of the output pump group 400 and / or the cryogenic switching valve 200.

[0028] like Figure 2 As shown, the cryogenic switching valve 200 includes: an outer cover 201 and a valve seat 212 respectively disposed outside and inside the cup cover 107, a valve body movably disposed inside the outer cover 201, and an elastic reset mechanism connected to the valve body, wherein: the liquid outlet pipe 507 passes through the valve seat 212 and the end of the valve body is located in the liquid outlet pipe 507.

[0029] The valve body includes: a spring 206, a valve stem 207, and a valve core 209 connected in sequence and arranged vertically, wherein: the spring 206 is connected to the inner wall of the outer cover 201, the valve stem 207 is in contact with the elastic reset mechanism, and the end of the valve core 209 is located in the liquid outlet pipe 507.

[0030] The elastic reset mechanism includes: a lever mechanism 203 disposed inside the outer cover 201, and a magnetic pair located at one end of the lever mechanism 203 and on the opposite side inside the outer cover 201, wherein: one end of the lever mechanism 203 is movably connected to the valve stem 207.

[0031] like Figure 3 As shown, the low-temperature probe 300 has a double-layer structure, including: a flexible outer tube 305 for the low-temperature probe, a flexible inner tube 306 for the low-temperature probe, and several contact supports 307 located therebetween.

[0032] The outlet end of the low-temperature probe 300 is movably equipped with an atomizing nozzle 303.

[0033] This device operates as follows: the opening and closing of the outlet pipe 507 is controlled by the cooperation of the conical valve core 209 and the valve seat 212. Specifically, pressing down the valve core 209 to fit against the valve seat blocks the outlet pipe, while lifting the valve core opens it. The valve core is made of low-temperature resistant polytetrafluoroethylene (PTFE), which retains a certain elasticity even at liquid nitrogen temperatures, thus improving sealing. The up-and-down movement of the valve core is achieved by the traction of the valve stem 207. To prevent liquid nitrogen from leaking out through the valve stem, a bellows 208 is installed between the valve stem and the valve seat. This bellows is welded to and sealed to both the valve stem and the valve seat, preventing leakage of the internal fluid medium. Simultaneously, the bellows' inherent characteristics allow for up-and-down movement of the valve stem. To prevent excessive pressure caused by the expansion of the cryogenic fluid entering the bellows upon rewarming, an vent 211 is provided, allowing the fluid to flow back to the outlet pipe 507, maintaining constant pressure equal to that of the outlet pipe. A spring 206 is located at the top of the valve stem. In the initial state, the spring is compressed, pressing the valve stem downwards, causing the valve plug 209 to press against the valve seat, meaning the valve is normally closed. When the valve needs to be opened, the electromagnet 205 is energized, and the resulting magnetic field provides an attractive force to the magnet 204 located at one end of the lever 203, causing the magnet 204 to move downwards. According to the lever principle, the other end of the lever is raised upwards. The other end of the lever is connected to the valve stem via a limit switch, thereby pulling the valve stem upwards and opening the valve. The entire mechanism is integrated and mounted on the cup lid. For safety and aesthetics, the lever, electromagnet, magnet, spring, and part of the valve stem are positioned at room temperature on the outer top of the cup lid 107.

[0034] The above-described specific implementations can be partially adjusted by those skilled in the art in different ways without departing from the principles and purpose of this utility model. The scope of protection of this utility model is determined by the claims and is not limited to the above-described specific implementations. All implementation schemes within its scope are bound by this utility model.

Claims

1. A cryoablation device for bronchoscopy, characterized in that, include: The double-layer cryogenic insulated cup consists of a cup lid located at its top and bottom, and an output pump assembly. The cup lid is equipped with a cryogenic switch valve that connects to the bottom of the double-layer cryogenic insulated cup. The output pump assembly is connected to the inside of the double-layer cryogenic insulated cup via a capillary tube and pressurizes the inside of the cup to output liquid nitrogen through the cryogenic switch valve.

2. The cryoablation device for bronchoscopy according to claim 1, characterized in that, The double-layer cryogenic insulated cup includes: a cryogenic insulated cup outer shell, a cryogenic insulated cup inner container, and a vacuum interlayer located therebetween, wherein: the cup lid is sealed to the top of the cryogenic insulated cup inner container.

3. The cryoablation device for bronchoscopy according to claim 1, characterized in that, The input and output ends of the aforementioned cryogenic switching valve are respectively connected to the bottom of the double-layer cryogenic insulated cup through the liquid outlet pipe and to the outside of the cup through the quick cryogenic connector.

4. The cryoablation device for bronchoscopy according to claim 3, characterized in that, The rapid cryogenic connector is equipped with a cryogenic probe, which has a double-layer structure, including: a flexible outer tube for the cryogenic probe, a flexible inner tube for the cryogenic probe, and several contact supports located therebetween. The outlet end of the low-temperature probe is movably equipped with an atomizing nozzle.

5. The cryoablation device for bronchoscopy according to claim 1, characterized in that, The capillary circuit is located outside the double-layer low-temperature insulated cup and its two ends are connected to the cup lid and the output pump group, respectively. Specifically, it includes a straight section of the pressurized gas pipeline and a bend section of the pressurized gas pipeline.

6. The cryoablation device for bronchoscopy according to claim 1, characterized in that, The output pump assembly includes: an air pump and a battery and a controller connected thereto. The double-layer cryogenic insulated cup is provided with a handle on the outside, and the handle is provided with at least one electrical switch connected to the controller of the output pump group and / or the cryogenic switching valve.

7. The cryoablation device for bronchoscopy according to claim 1, characterized in that, The cryogenic switching valve includes: an outer cover and a valve seat respectively disposed outside and inside the cup lid, a valve body movably disposed inside the outer cover, and an elastic reset mechanism connected to the valve body, wherein: the liquid outlet pipe passes through the valve seat and the end of the valve body is located in the liquid outlet pipe.

8. The cryoablation device for bronchoscopy according to claim 7, characterized in that, The valve body includes: a spring, a valve stem, and a valve core arranged vertically in sequence, wherein: the spring is connected to the inner wall of the outer cover, the valve stem is in contact with the elastic reset mechanism, and the end of the valve core is located in the liquid outlet pipe.

9. The cryoablation device for bronchoscopy according to claim 7, characterized in that, The elastic reset mechanism includes: a lever mechanism disposed inside the outer cover, and a magnetic pair located at one end of the lever mechanism and on the opposite side inside the outer cover, wherein: the other end of the lever mechanism is movably connected to the valve stem.

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