Split joint structure of cryoprobe and cryoprobe system

Abstract

The utility model discloses a split joint structure of a cryoprobe and a cryoprobe system, relates to the technical field of medical instruments, and can solve the problem that a catheter and a needle head part are continuously shaken in the connection process of the existing cryoprobe. The split joint structure of the cryoprobe comprises a conversion female head, a probe plug used for being inserted into the conversion female head in the axial direction, and a nut buckle which is arranged on the probe plug in a sleeving mode and rotationally connected with the probe plug, and the nut buckle is in threaded connection with the conversion female head; and the nut buckle and the probe plug are relatively fixed along the axial direction.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a split joint structure of a freezing probe and a freezing probe system. Background Art

[0002] The main function of the cryoprobe is to sample or inactivate lesions. Its principle is based on the Joule-Thomson effect. It uses high-pressure gas to quickly release pressure at the needle part of the cryoprobe to achieve extremely rapid cooling, generating an ultra-low temperature of less than minus 60 degrees Celsius at the needle part of the cryoprobe, so that tumor cells can be removed after adhering to the needle of the cryoprobe or the diseased tissue can be directly frozen and inactivated.

[0003] The entire system usually includes an air source part, an air circuit control device part and a cryoprobe part. Due to the industry particularity of the medical device field, the cryoprobe part usually needs to be replaced after use or after several uses. At present, the connector of the cryoprobe and the air outlet end of the air circuit control device are usually fixedly connected by a threaded connection. Since the catheter part of the cryoprobe is long, which can reach more than 1 meter, and it usually needs to have a flexible property to smoothly extend into the lesion, in the process of connecting the cryoprobe, the catheter, needle and other parts will swing as the connector of the cryoprobe rotates, affecting the connection operation, and there is a risk of needle damage.

[0004] Against the above background, the inventors have designed a split joint structure of a cryoprobe and a cryoprobe system to solve the above problems, and thus proposed the present application. Utility Model Content

[0005] The purpose of the present application is to provide a split joint structure of a cryoprobe and a cryoprobe system, so as to solve the problem that the catheter and the needle part of the current cryoprobe may be constantly swung during the connection process.

[0006] In order to solve the above technical problems, the present invention adopts the following solutions:

[0007] In one aspect, the present application provides a split joint structure of a cryoprobe, comprising:

[0008] A conversion female head and a probe plug for axially inserting into the conversion female head, and a nut buckle sleeved on the probe plug and rotatably connected thereto, the nut buckle being threadedly connected to the conversion female head;

[0009] The nut buckle and the probe plug are relatively fixed along the axial direction.

[0010] Optionally, the conversion female head includes a snap-fit end head with external threads;

[0011] The nut buckle includes a buckle thread section for threaded connection with the engaging end, and an annular convex push-pull section, the annular convex push-pull section being located on a side of the buckle thread section away from the engaging end;

[0012] Also included is a probe cover fixedly connected to the probe plug;

[0013] The probe plug is provided with a pressure-bearing ring convex for being pushed by the ring convex push-pull section, and the ring convex push-pull section is located between the pressure-bearing ring convex and the probe cover.

[0014] Optionally, the nut buckle further includes a sizing snap-in section;

[0015] The sum of the lengths of the sizing clip-in section and the clip thread section is less than or equal to the length of the clip end.

[0016] Optionally, a mounting step is provided on one end of the probe cover facing the nut buckle;

[0017] The pressure-bearing annular protrusion of the probe plug and the installation step can form an annular groove that is adapted to the shape of the push-pull section of the annular protrusion.

[0018] Optionally, an airway tube and catheter sheath are also included;

[0019] The airway tube includes an outer tube and an inner tube, wherein the inner tube is located inside the outer tube;

[0020] The inner conduit is sealed and fixedly connected to the probe plug;

[0021] The outer catheter is fixed on the catheter sheath, and the catheter sheath is fixed on the probe cover.

[0022] Optionally, the probe plug is provided with two mounting ring grooves for mounting a sealing ring at one end facing the conversion female head, and an exhaust ring groove located between the two mounting ring grooves;

[0023] The probe plug is provided with multiple sections of conduit mounting holes with decreasing diameters. The conduit mounting holes are communicated with the exhaust ring groove. The conduit mounting holes include a sealing mounting section for mounting the inner conduit of the air guide tube.

[0024] Optionally, the conversion female head is provided with a plug installation slot for installing the probe plug, as well as a high-pressure air duct and a low-pressure air duct, the high-pressure air duct and the low-pressure air duct being connected to the bottom and the periphery of the plug installation slot respectively;

[0025] When the nut buckle is locked with the conversion female thread, the two mounting ring grooves of the probe plug are located at both ends of the low-pressure airway port.

[0026] Optionally, a rubber sealing ring is also included and arranged in the mounting ring groove.

[0027] Optionally, a handle sleeve is further included, and the handle sleeve is fixed on the conversion female head.

[0028] Another aspect of the present application provides a cryoprobe system, including a cryoprobe, wherein the cryoprobe includes any one of the above-mentioned split joint structures of the cryoprobe.

[0029] Beneficial effects of the utility model:

[0030] The present application provides a conversion female head, a probe plug, and a nut clip that is sleeved on the probe plug and rotatably connected thereto, and the nut clip and the probe plug are relatively fixed axially, so that after the probe plug is inserted into the conversion female head, the nut clip can be driven to rotate separately, thereby causing the nut clip to pull the probe plug into the conversion female head, or push the probe plug out of the conversion female head, thereby completing the locking or unlocking action of the conversion female head and the probe plug, and at the same time, there is no need to rotate the airway tube, probe plug and other parts, thereby effectively solving the problem that the current freezing probe will cause the catheter and needle parts to swing continuously during the connection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the main structure of Example 1 of the present application.

[0032] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of AA.

[0033] Figure 3 for Figure 2 A partial enlarged schematic diagram of point B in the middle.

[0034] Figure 4 This is a schematic diagram of the three-dimensional structure of Example 1 of the present application.

[0035] Figure 5 This is a structural diagram of Example 2 of this application.

[0036] Description of reference numerals:

[0037] 1-handle sleeve, 2-conversion female head, 21-clamping end, 22-plug mounting slot, 23-high-pressure airway, 24-low-pressure airway, 3-nut buckle, 31-buckle threaded section, 32-ring convex push-pull section, 33-sizing snap-in section, 4-probe cover, 41-installation step, 5-catheter sheath, 6-air guide tube, 61-inner catheter, 62-outer catheter, 7-probe plug, 71-pressure ring convex, 72-installation ring groove, 73-exhaust ring groove, 74-catheter mounting hole cavity, 75-sealing ring, 8-gas tank, 9-air flow control device. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0039] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "opened," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0041] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0042] Example 1:

[0043] like Figures 1 to 4 As shown, this embodiment provides a split joint structure of a cryoprobe, comprising:

[0044] A conversion female connector 2 and a probe plug 7 for axially inserting into the conversion female connector 2, and a nut buckle 3 sleeved on the probe plug 7 and rotatably connected thereto, the nut buckle 3 being threadedly connected to the conversion female connector 2;

[0045] The nut buckle 3 and the probe plug 7 are relatively fixed along the axial direction.

[0046] In this embodiment, a conversion female head 2, a probe plug 7, and a nut buckle 3 that is sleeved on the probe plug 7 and rotatably connected thereto are provided. The nut buckle 3 and the probe plug 7 are relatively fixed axially, so that after the probe plug 7 is inserted into the conversion female head 2, the nut buckle 3 can be driven to rotate separately, thereby causing the nut buckle 3 to pull the probe plug 7 into the conversion female head 2, or push the probe plug 7 out of the conversion female head 2, thereby completing the locking or unlocking action of the conversion female head 2 and the probe plug 7. At the same time, there is no need to rotate parts such as the airway tube 6 and the probe plug 7, thereby effectively solving the problem that the current cryoprobe causes the catheter and needle parts to swing continuously during the connection process.

[0047] Specifically, in this embodiment, Figures 1 to 3 As shown, the conversion female head 2 includes a clamping end head 21 with external threads;

[0048] The nut buckle 3 includes a buckle thread section 31 for threaded connection with the engaging end 21, and an annular convex push-pull section 32, the annular convex push-pull section 32 is located on the side of the buckle thread section 31 away from the engaging end 21;

[0049] It also includes a probe cover 4 fixedly connected to the probe plug 7;

[0050] The probe plug 7 is provided with a pressure-bearing annular protrusion 71 for being pushed by the annular protrusion push-pull section 32 . The annular protrusion push-pull section 32 is located between the pressure-bearing annular protrusion 71 and the probe cover 4 .

[0051] In this embodiment, the cross-section of the annular convex push-pull section 32 is convex-shaped. The annular convex push-pull section 32 includes an annular protrusion located on the inner wall of the nut buckle 3. The cross-section of the annular protrusion can be rectangular, semicircular, triangular or other shapes.

[0052] The present application sets an annular convex push-pull section 32, which can push the probe plug 7 into the conversion female head 2, or pull the probe plug 7 out of the conversion female head 2 through the probe cover 4, thereby realizing the locking and unlocking action of the probe plug 7 and the conversion female head 2.

[0053] Specifically, in this embodiment, Figure 3 As shown, the nut buckle 3 further includes a sizing snap-in section 33;

[0054] The sum of the lengths of the sizing snap-in section 33 and the clip thread section 31 is less than or equal to the length of the clip end 21. The sizing snap-in section 33 facilitates threaded connection between the nut clip 3 and the clip end 21. In this embodiment, the sum of the lengths of the sizing snap-in section 33 and the clip thread section 31 is equal to the length of the clip end 21.

[0055] Specifically, in this embodiment, Figure 3As shown, the probe cover 4 is provided with a mounting step 41 at one end facing the nut buckle 3;

[0056] The pressure-bearing ring protrusion 71 of the probe plug 7 and the installation step 41 can form an annular groove that is adapted to the shape of the ring protrusion push-pull section 32, so that the ring protrusion push-pull section 32 can be installed in the annular groove formed by the pressure-bearing ring protrusion 71 and the installation step 41, forming a shape fit to prevent the nut buckle 3 from moving axially.

[0057] Specifically, in this embodiment, Figure 2 and Figure 3 ,as well as Figure 4 As shown, it also includes an airway tube 6 and a catheter sheath 5;

[0058] The airway tube 6 includes an outer tube 62 and an inner tube 61 , wherein the inner tube 61 is located inside the outer tube 62 ;

[0059] The inner conduit 61 is sealed and fixedly connected to the probe plug 7;

[0060] The outer catheter 62 is fixed to the catheter sheath 5, and the catheter sheath 5 is fixed to the probe cover 4. In this embodiment, the inner catheter 61 is a steel tube, the outer catheter 62 is a plastic tube, and the probe head is an existing structure, which will not be described in detail here.

[0061] The catheter sheath 5 in this embodiment is made of silicone to prevent the airway tube 6 from being damaged by shear force.

[0062] Specifically, in this embodiment, Figure 2 and Figure 3 As shown, the probe plug 7 is provided with two mounting ring grooves 72 for mounting a sealing ring 75 at one end facing the conversion female connector 2, and an exhaust ring groove 73 located between the two mounting ring grooves 72;

[0063] Probe plug 7 includes multiple conduit mounting holes 74 of decreasing diameter. These holes communicate with exhaust annular groove 73 and include a sealed mounting section for mounting inner conduit 61 of airway 6. Two mounting annular grooves 72 are provided, located on either side of exhaust annular groove 73, to prevent direct communication between high-pressure airway 23 and low-pressure airway 24 without passing through the probe head.

[0064] Specifically, in this embodiment, Figure 2 and Figure 3 As shown, the conversion female head 2 is provided with a plug installation groove 22 for installing the probe plug 7, as well as a high-pressure air channel 23 and a low-pressure air channel 24. The high-pressure air channel 23 and the low-pressure air channel 24 are respectively connected to the bottom and the periphery of the plug installation groove 22;

[0065] When the nut buckle 3 and the conversion female head 2 are threadedly locked, the two mounting ring grooves 72 of the probe plug 7 are located at both ends of the low-pressure airway 24. In this embodiment, Figure 3 As shown, the air port of the low-pressure air channel 24 is arranged opposite to the exhaust ring groove 73 to facilitate exhaust of the low-pressure air channel 24.

[0066] Specifically, in this embodiment, Figure 3 As shown, the rubber seal ring 75 is further included and is arranged in the mounting ring groove 72. The rubber seal ring 75 is provided to avoid cross-flow of the high-pressure air channel 23 and the low-pressure air channel 24.

[0067] Specifically, in this embodiment, Figures 1 to 4 As shown, it also includes a handle sleeve 1, which is fixed on the conversion female head 2. In this embodiment, the handle sleeve is fixed on the conversion female head 2 by a pin. The handle sleeve is a conventional component and will not be described in detail here.

[0068] Example 2:

[0069] On the basis of the above embodiment 1, Figure 5 As shown, this embodiment provides a cryoprobe system, including a cryoprobe, and the cryoprobe includes the split joint structure of the cryoprobe described above.

[0070] The cryoprobe further includes a probe head, and the outer catheter 62 and the inner catheter 61 are connected through the probe head.

[0071] This embodiment also includes a gas tank 8 and an airflow control device 9. The gas tank 8 is connected to the air guide tube 6 of the freezing probe through the airflow control device 9. The gas tank 8 of this application is a carbon dioxide gas tank 8, and the airflow control device 9 is an existing device and will not be described here.

[0072] The rest of the structure of this embodiment is the same as that of the above-mentioned embodiment 1 and will not be described in detail here.

[0073] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will be able to make various modifications and improvements without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A split joint structure of a cryoprobe, characterized in that: include: A conversion female head (2) and a probe plug (7) for axially inserting into the conversion female head (2), and a nut buckle (3) sleeved on the probe plug (7) and rotatably connected thereto, wherein the nut buckle (3) is threadedly connected to the conversion female head (2); The nut buckle (3) and the probe plug (7) are relatively fixed along the axial direction.

2. The split joint structure of a cryoprobe according to claim 1, characterized in that: The conversion female head (2) comprises a snap-fit end head (21) having an external thread; The nut buckle (3) comprises a buckle thread section (31) for threaded connection with the engaging end head (21), and an annular convex push-pull section (32), wherein the annular convex push-pull section (32) is located on a side of the buckle thread section (31) away from the engaging end head (21); It also includes a probe cover (4) fixedly connected to the probe plug (7); The probe plug (7) is provided with a pressure-bearing annular protrusion (71) for being pushed by the annular protrusion push-pull section (32), and the annular protrusion push-pull section (32) is located between the pressure-bearing annular protrusion (71) and the probe cover (4).

3. The split joint structure of a cryoprobe according to claim 2, characterized in that: The nut buckle (3) further includes a sizing snap-in section (33); The sum of the lengths of the sizing snap-in section (33) and the snap-in thread section (31) is less than or equal to the length of the snap-in end head (21).

4. The split joint structure of a cryoprobe according to claim 2, characterized in that: An installation step (41) is provided on one end of the probe cover (4) facing the nut buckle (3); The pressure-bearing annular projection (71) of the probe plug (7) and the installation step (41) can form an annular groove that matches the shape of the annular projection push-pull section (32).

5. The split joint structure of a cryoprobe according to claim 2, characterized in that: Also includes an airway tube (6) and a catheter sheath (5); The airway tube (6) comprises an outer tube (62) and an inner tube (61), wherein the inner tube (61) is located inside the outer tube (62); The inner conduit (61) is sealed and fixedly connected to the probe plug (7); The outer catheter (62) is fixed on the catheter sheath (5), and the catheter sheath (5) is fixed on the probe cover (4).

6. The split joint structure of a cryoprobe according to claim 1, characterized in that: The probe plug (7) is provided with two mounting ring grooves (72) for mounting a sealing ring (75) at one end facing the conversion female connector (2), and an exhaust ring groove (73) located between the two mounting ring grooves (72); The probe plug (7) is provided with a plurality of conduit mounting holes (74) with decreasing diameters. The conduit mounting holes (74) are communicated with the exhaust ring groove (73). The conduit mounting holes (74) include a sealing mounting section for mounting an inner conduit (61) of the air guide tube (6).

7. The split joint structure of a cryoprobe according to claim 6, characterized in that: The conversion female head (2) is provided with a plug installation groove (22) for installing the probe plug (7), as well as a high-pressure air channel (23) and a low-pressure air channel (24), and the high-pressure air channel (23) and the low-pressure air channel (24) are respectively communicated with the bottom and the periphery of the plug installation groove (22); When the nut buckle (3) and the conversion female head (2) are thread-locked, the two mounting ring grooves (72) of the probe plug (7) are located at both ends of the air port of the low-pressure airway (24).

8. The split joint structure of a cryoprobe according to claim 6, characterized in that: It also includes a rubber sealing ring (75) arranged in the mounting ring groove (72).

9. The split joint structure of a cryoprobe according to claim 1, characterized in that: It also includes a handle sleeve (1), which is sleeved and fixed on the conversion female head (2).

10. A cryoprobe system, characterized in that: The invention comprises a freezing probe, which comprises a split joint structure of a freezing probe according to any one of claims 1-9.

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