CN217488647U

CN217488647U - Bioimpedance detection catheter

Info

Publication number: CN217488647U
Application number: CN202123095405.2U
Authority: CN
Inventors: 王礼明; 徐宏; 周华珍
Original assignee: Hangzhou Kunbo Biotechnology Co Ltd
Current assignee: Hangzhou Kunbo Biotechnology Co Ltd
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-09-27
Anticipated expiration: 2031-12-10

Abstract

The utility model relates to the field of medical equipment, a biological impedance detection pipe is disclosed. The utility model discloses a biological impedance detects pipe, include: operating handle, pipe, detection mechanism and accent curved mechanism, the pipe includes: insert the section and transfer curved section, detection mechanism includes: insulating base, probe, wire and connecting seat, the connecting seat setting is on operating handle, and insulating base sets up at the tip of transferring the curved section, and the probe setting is downthehole at insulating base's probe, and the one end and the probe connection of wire, the other end are connected with the connecting seat, and the mechanism setting of transferring the curve is in the pipe, and one end is connected with insulating base, and the other end is connected with operating handle. The biological impedance detection catheter of the utility model, the catheter extends into the suspected focus or tumor tissue, the detection equipment directly carries out impedance detection on the biological tissue, the efficiency is improved, and the impedance detection is more accurate; the bending mechanism can bend the conduit, so that the part of the organism inconvenient to detect can be detected, and the accuracy of detection is improved.

Description

Bioimpedance detection catheter

Technical Field

The embodiment of the utility model provides a relate to the medical instrument field, concretely relates to biological impedance detects pipe.

Background

The biological tissue impedance detection technology is generally applied to impedance detection of isolated tissues, and doctors send tiny alternating current measurement current or voltage to a detection object by means of an electrode system arranged on the surface of a detected biological tissue after cutting suspected pathological tissues or tumor tissues, detect the electrical impedance and the change of the surface of the biological tissue, and then acquire related physiological and pathological information according to different application purposes.

At present, when impedance detection is carried out on biological tissues, the biological tissues are generally taken out through a biopsy surgical instrument, and after the taken-out biological tissue slices are cleaned, the impedance of isolated tissues is detected.

However, the impedance of the biological tissue detected by the existing method is not accurate, the detection probe of the existing biopsy surgical instrument cannot be bent, and the biological bending narrow lumen cannot be sampled and detected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a biological impedance detects pipe to solve the problem among the background art.

An embodiment of the utility model provides a biological impedance detects pipe, include: the device comprises an operating handle, a catheter, a detection mechanism and a bending adjusting mechanism;

the catheter includes: an insertion section and a bending section;

the insertion section is made of flexible materials and is connected with the operating handle;

the detection mechanism includes: the probe comprises an insulating base, a probe, a lead and a connecting seat;

the connecting seat is arranged on the operating handle and is used for being electrically connected with external detection equipment;

the insulation base is arranged at the end part of the bending adjusting section and is provided with a plurality of probe holes;

the probe is arranged on the insulating base and positioned in the probe hole and the bending adjusting section, one end of the lead is connected with the probe, and the other end of the lead penetrates through the operating handle and is connected with the connecting seat;

the bending adjusting mechanism is arranged in the guide pipe, one end of the bending adjusting mechanism is connected with the insulating base, the other end of the bending adjusting mechanism is connected with the operating handle, and the bending adjusting mechanism is used for enabling the bending adjusting section to be bent relative to the inserting section.

According to the above technical scheme, the utility model discloses a biological impedance detects pipe, through setting up operating handle, pipe, detection mechanism and accent curved mechanism, the pipe includes: insert the section and transfer curved section, insert the section and make by flexible material, detection mechanism includes: insulating base, probe, wire and connecting seat, connecting seat setting are on operating handle, and insulating base sets up at the tip of transferring the curved section, and the probe setting is connected with the connecting seat through the wire in insulating base's the probe hole, transfers curved mechanism to set up in the pipe, and one end is connected with insulating base, and the other end is connected with operating handle. The utility model discloses a biological impedance detection catheter, pipe pass through bronchoscope forceps channel and get into the suspected focus of organism (human body) or tumor tissue department, and check out test set directly carries out impedance detection to biological tissue, and biological tissue does not separate, need not to cut biological tissue, has improved operation time and efficiency, has reduced the health damage to the patient, and impedance detection is more accurate; the catheter is made of flexible materials, and can be bent through the bending adjusting mechanism, so that the catheter can reach more inconvenient detection positions of organisms, the probe is ensured to be fully contacted with the focus position, and the detection accuracy is improved.

In one possible solution, the bend adjusting mechanism comprises: the riveting pipe, the spring and the pull wire;

the operating handle includes: the shell, the push button, the sliding block and the pull wire fixing column are arranged on the shell;

the sliding block is arranged in a sliding groove of the shell in a sliding way, the stay wire fixing column is arranged on the sliding block, and the push button is arranged on the shell and connected with the sliding block;

the riveting pipe is arranged on the insulating base;

the pull wire is provided with a fixed convex ring, and the spring is sleeved on the pull wire and is propped against the fixed convex ring;

one end of the stay wire is connected with the riveting pipe, the other end of the stay wire is connected with the stay wire fixing column, and the spring is positioned in the insertion section. The structure can bend the bending section relative to the inserting section by pushing and pulling the push button.

In one possible aspect, the operating handle further includes: fixing the knob;

the shell is provided with a threaded hole;

the fixing knob is meshed with the threaded hole and extends into the shell, and the fixing knob is used for limiting the sliding of the sliding block when being screwed. The structure can ensure that the bending adjusting section keeps a bending state after being bent.

In a feasible scheme, a stay wire groove is formed in the side wall of the insulating base, and a stay wire guide channel is formed in the inner wall of the bending adjusting section;

the riveting tube is embedded in the stay wire groove, and the stay wire penetrates through the stay wire guide channel. The structure facilitates the fixation of the riveting pipe and realizes the guiding of the stay wire.

In one possible embodiment, the housing is provided with a conductor arrangement groove for the insertion of the conductor. The structure facilitates the arrangement of the conducting wires in the operating handle.

In one possible solution, the probe hole is a stepped hole;

one end of the probe is provided with a limiting step, and the other end of the probe is provided with a connecting hole;

the limiting step is used for abutting against a step shoulder of the probe hole, and the connecting hole is used for inserting the lead. The structure facilitates the connection and fixation of the probe and the insulating base.

In one possible embodiment, the outer side of the conductor is covered with an insulating layer, and the outer side of the insulating layer is covered with a shielding layer. The structure enables the detection to be more accurate.

In one possible embodiment, the method further comprises: a negative pressure suction mechanism;

the negative pressure suction mechanism includes: a negative pressure suction tube and a luer connector;

the luer connector is arranged on the operating handle and is used for being connected with external negative pressure suction equipment;

the insulating base is provided with a negative pressure suction hole;

the negative pressure suction tube is arranged in the guide tube in a penetrating mode, one end of the negative pressure suction tube is arranged on the insulating base and communicated with the negative pressure suction hole, and the other end of the negative pressure suction tube is connected with the Ruhr joint. This structure ensures the stability of the detected tissue.

In a feasible scheme, the negative pressure suction hole is a stepped hole;

the negative pressure suction tube penetrates through the negative pressure suction hole and is abutted against the step shoulder of the negative pressure suction hole. The structure facilitates the connection and fixation of the negative pressure suction tube and the insulating base.

In a feasible scheme, the operating handle is provided with a negative pressure suction pipe arrangement groove, and the negative pressure suction pipe arrangement groove is used for embedding the negative pressure suction pipes. The structure facilitates the arrangement of the negative pressure suction tube in the operating handle.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic view of a bioimpedance detection catheter in an embodiment of the present invention;

fig. 2 is a schematic view of an operating handle in an embodiment of the present invention;

fig. 3 is an enlarged view of a point a in fig. 2 in an embodiment of the present invention;

fig. 4 is a schematic view of a bending adjustment mechanism in an embodiment of the present invention;

fig. 5 is a partial enlarged view of fig. 4 in an embodiment of the present invention;

fig. 6 is a schematic view of an insulating base according to an embodiment of the present invention;

fig. 7 is a schematic view of a bend adjusting section in an embodiment of the present invention;

fig. 8 is a schematic diagram of a probe in an embodiment of the invention.

Reference numbers in the figures:

1. an operating handle; 11. a housing; 111. a wire arrangement groove; 112. a negative pressure suction pipe arrangement groove; 12. A push button; 13. a slider; 14. a stay wire fixing column; 15. a front end cap; 16. fixing the knob; 2. a conduit; 21. an insertion section; 22. bending section adjustment; 221. a pull wire guide channel; 31. an insulating base; 311. a probe hole; 312. a wire drawing groove is formed; 313. a negative pressure suction hole; 32. a probe; 321. a limiting step; 33. a wire; 331. an insulating layer; 332. a shielding layer; 34. a connecting seat; 41. riveting a pipe; 42. a spring; 43. a pull wire; 51. a negative pressure suction tube; 52. a luer fitting.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; the connection can be mechanical connection, electrical connection or communication connection; either directly or indirectly through intervening media, either internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The technical solution of the present invention will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

As described in the background of the present application, in the current impedance detection of biological tissue, the biological tissue is generally removed by a biopsy surgical instrument, and after the removed biological tissue is cleaned, the impedance of the isolated tissue is measured.

The inventor of the application finds that biopsy sampling consumes a large amount of time, the detection efficiency is reduced, after the biological tissue is sliced in vitro, the biopsy sampling leaves the original tissue environment, the tissue structure is damaged, a large amount of time is consumed, the impedance of the biological tissue is changed to a certain extent, and a certain error exists in the accuracy of the measurement result; in vitro biological tissue impedance detection, generally, gauze or a swab is used for removing body fluid or blood, but when a human body is tested internally, the cotton swab or the gauze is not easy to remove the body fluid or the blood on the surface of a target biological tissue, and the body fluid or the blood on the surface of the tissue can cause inaccuracy of a measurement result; in vitro detection mainly adopts a handheld detection probe, the detected tissue size is often large, for small focuses, the small focuses are often difficult to cut and peel, and the focuses close to lung pleura, diaphragm and other parts are often difficult to cut and peel; the head end of the existing detection probe cannot be bent and cannot enter into a certain bent narrow tube cavity for detection.

In order to solve the above problems, the inventor of the present application proposes a technical solution of the present application, and specific embodiments are as follows:

fig. 1 is the schematic view of the bioimpedance detection catheter in the embodiment of the present invention, fig. 2 is the embodiment of the present invention is a schematic view of the operating handle, fig. 3 is the embodiment of the present invention is an enlarged view of a position in fig. 2, fig. 4 is the embodiment of the present invention is a schematic view of a bending mechanism, fig. 5 is the embodiment of the present invention is a local enlarged view in fig. 4, fig. 6 is the embodiment of the present invention is a schematic view of an insulation base, fig. 7 is the embodiment of the present invention is a schematic view of a bending section, fig. 8 is a schematic view of a probe in the embodiment of the present invention. As shown in fig. 1 to 8, the bio-impedance detection catheter of the present embodiment includes: the device comprises an operating handle 1, a catheter 2, a detection mechanism and a bending adjusting mechanism.

The catheter 2 comprises: an insertion section 21 and a bend section 22.

The insertion section 21 of the catheter 2 is made of a flexible material, and the insertion section 21 may be a polymer extruded tube, a braided tube, or the like. One end of the insertion section 21 of the catheter 2 is connected with the front end of the operation handle 1, and the bending section 22 is connected with the other end of the insertion section 21.

The detection mechanism includes: an insulating base 31, a probe 32, a lead 33, and a connection holder 34.

The connecting base 34 is disposed at the rear end of the operating handle 1 through a connecting pipe, and a joint of the connecting base 34 is used for electrically connecting with an external detection device.

The insulating base 31 is provided at an end of the bend adjusting portion 22, and the insulating base 31 is provided with a plurality of probe holes 311 therethrough, and the probe holes 311 communicate with the catheter 2.

The probes 32 are provided with a plurality of probes 32, the probes 32 are respectively arranged in the probe holes 311 of the insulating base 31 and fixedly connected with the insulating base 31, and the other ends of the probes 32 extend into the bending section 22 of the catheter 2.

The conducting wires 33 are provided with a plurality of conducting wires 33, one ends of the conducting wires 33 are respectively connected with the probes 32, and the other ends of the conducting wires 33 penetrate through the catheter 2 and the operating handle 1 and are respectively connected with the core seats of the connecting seats 34.

The bending adjusting mechanism is arranged in the guide pipe 2 in a penetrating mode, one end of the bending adjusting mechanism is connected with the insulating base 31, and the other end of the bending adjusting mechanism is connected with the operating handle 1. When the bending adjusting mechanism is triggered, the bending adjusting section 22 of the catheter 2 is bent relative to the insertion section 21, so that the end part of the catheter 2 extends into a part which is inconvenient to detect in a living body (human body), such as a branch trachea which is bent by the human body, so as to detect the part which is inconvenient to detect in the human body.

Through the above, it can be easily found that the bio-impedance detection catheter of the present embodiment, by providing the operation handle, the catheter, the detection mechanism and the bending mechanism, the catheter includes: insert the section and transfer curved section, insert the section and make by flexible material, detection mechanism includes: insulating base, probe, wire and connecting seat, the connecting seat setting is on operating handle, and insulating base sets up at the tip of transferring the curved section, and the probe setting is connected with the connecting seat through the wire in insulating base's the probe hole, transfers curved mechanism to set up in the pipe, and one end is connected with insulating base, and the other end is connected with operating handle. According to the biological impedance detection catheter, the catheter enters a suspected focus or tumor tissue of a living body (human body) through a bronchoscope clamp channel, the detection equipment directly performs impedance detection on the biological tissue, the biological tissue is not separated, the biological tissue does not need to be cut, the operation time and efficiency are improved, the body damage to a patient is reduced, and the impedance detection is more accurate; the catheter is made of flexible materials, and can be bent through the bending adjusting mechanism, so that the catheter can reach more inconvenient detection parts of an organism, the probe is ensured to be fully contacted with a focus part, and the detection accuracy is improved.

Optionally, as shown in fig. 2, 4, and 5, in the bio-impedance detecting catheter in the present embodiment, the bending adjusting mechanism includes: rivet tube 41, spring 42 and pull wire 43.

The operation handle 1 includes: the device comprises a shell 11, a push button 12, a sliding block 13, a pull wire fixing column 14 and a front end cap 15.

Be equipped with the spout in casing 11, slider 13 slidable sets up in the spout of casing 11, and fixed column 14 of acting as go-between sets up on slider 13, pushes away button 12 and sets up on casing 11, and pushes away button 12 and stretch into in casing 11, is connected with slider 13 in casing 11, and front end cap 15 sets up the front end at casing 11.

The insertion section 21 of the catheter 2 is fixedly attached to the forward end of the housing 11.

The rivet pipe 41 of the bend adjusting mechanism is arranged on the insulating base 31.

Two fixed convex rings are arranged on the pull wire 43, the spring 42 is sleeved on the pull wire 43, two ends of the spring 42 are propped against the fixed convex rings on the pull wire 43, and the spring 42 is positioned in the insertion section 21 of the catheter 2 and is arranged close to the bending adjusting section 22 of the catheter 2.

The pull wire 43 is arranged in the conduit in a penetrating way, one end of the pull wire 43 is connected with the riveting tube 41, and the other end of the pull wire 43 passes through the conduit 2, extends into the shell 11 and is fixedly connected with the pull wire fixing column 14 in the shell 11.

In the embodiment, the push button is pushed backwards, the pull wire is pulled by the sliding block, so that the bending adjusting sections of the insulating base and the guide pipe are bent relative to the inserting section, and the insulating base and the bending adjusting sections can extend into the part, which is inconvenient to detect, in a living body for detection; and the push button is loosened, and the bending sections of the insulating base and the guide pipe are reset under the action of the spring.

Further, in the bio-impedance detection catheter of the present embodiment, the operation handle 1 further includes: the knob 16 is fixed.

The side wall of the housing 11 is provided with a threaded hole.

The fixing knob 16 is engaged with a threaded hole of the housing 11, and the fixing knob 16 is inserted into the housing 11. After the bending section 22 of the catheter 2 is bent relative to the insertion section 21, the fixing knob 16 is screwed to enable the fixing knob 16 to be abutted against the sliding block 13, and the sliding block 13 is fixed in the shell 11, so that the insulating base 31 and the bending section 22 are kept in a bending state, and impedance detection is carried out on the located lesion tissues.

Further, as shown in fig. 5, 6 and 7, in the bioimpedance detection conduit of the present embodiment, the insulating base 31 is stepped and inserted into the end of the bending section 22 of the conduit 2, and the stepped shoulder of the insulating base 31 abuts against the bending section 22.

The circumferential side wall of the insulating base 31 is provided with a wire drawing groove 312, the inner wall of the bending adjusting section 22 is provided with a wire drawing guide channel 221, and the wire drawing guide channel 221 on the bending adjusting section 22 corresponds to the position of the wire drawing groove 312 on the insulating base 31.

The rivet pipe 41 of the bending adjustment mechanism is embedded in the pull wire groove 312 of the insulation base 31 and fixedly connected with the insulation base 31. The pull wire 43 is arranged in the pull wire guide channel 221 of the bending adjusting section 22 in a penetrating way, one end of the pull wire 43 is connected with the riveting tube 41, and the other end of the pull wire 43 extends into the operating handle and is connected with the pull wire fixing column 14.

Further, in the bio-impedance detection catheter of the present embodiment, the probe hole 311 on the insulating base 31 is a stepped hole.

One end of the probe 32 is provided with a limit step 321, and the other end of the probe 32 is provided with a connection hole.

The probe 32 is inserted into the stepped probe hole 311 of the insulating base 31, the limit step 321 of the probe 32 is abutted against the step shoulder of the probe hole 311, so that the probe 32 is positioned in the probe hole 311, the probe 32 is prevented from penetrating out of the probe hole 311, the lead 33 extends into the connecting hole of the probe 32, and is fixedly connected with the probe 32 by bonding, crimping and other modes.

Further, in the bio-impedance detection catheter of the present embodiment, the outer side of the conducting wire 33 is covered with the insulating layer 331 to prevent the plurality of probes 32 from being electrically conducted; and the outside of the insulating layer 331 of the wire 33 is covered with the shielding layer 332, so that the transmission signals between the wires 33 are prevented from interfering with each other and affecting the detection effect when the wires 33 transmit signals.

Furthermore, in the bio-impedance detection catheter of the embodiment, the side wall of the housing 11 of the operation handle 1 is provided with a wire arrangement groove 111, and the wires 33 extending from the catheter 2 are embedded in the guide arrangement groove 111 of the housing 11 in the housing 11 of the operation handle 1, and are connected with the connection seat at the tail end of the operation handle 1.

Further, as shown in fig. 2 and 8, the bio-impedance detection catheter in the present embodiment further includes: a negative pressure suction mechanism.

The negative pressure suction mechanism includes: a negative pressure aspiration tube 51 and a luer connector 52.

The insulating base 31 is provided with a negative pressure suction hole 313 therethrough.

The luer connector 52 is provided on the operation handle 1 at the rear end of the operation handle 1 via a connection tube.

The negative pressure suction tube 51 is arranged in the catheter 2 in a penetrating way, one end of the negative pressure suction tube 51 is arranged on the insulating base 31 and is communicated with the negative pressure suction hole 313 of the insulating joint 31, the other end of the negative pressure suction tube 51 penetrates through the operating handle 1 and is connected with the luer joint 52, and the luer joint 52 is connected with external negative pressure suction equipment.

In this embodiment, blood or tissue fluid at the lesion is sucked by the external suction device to draw out the blood or tissue fluid on the surface of the biological tissue, thereby preventing the blood or tissue fluid from interfering with the impedance measurement result of the biological tissue.

Further, in the bioimpedance detection conduit according to the present embodiment, the negative pressure suction hole 313 in the insulating base 31 is a stepped hole.

The negative pressure suction tube 52 is inserted into the negative pressure suction hole 313 of the insulating base 31, abuts against a step shoulder of the negative pressure suction hole 313, and is fixedly connected to the insulating base 31 by glue or the like.

Further, in the bioimpedance detection catheter of the present embodiment, a negative pressure suction tube arrangement groove 112 is further provided in the side wall of the housing 11 of the operation handle 1, and the negative pressure suction tube 51 is fitted in the negative pressure suction tube arrangement groove 112 of the housing 11 in the housing 11 of the operation handle 1.

The biological impedance detection conduit of the utility model is used in cooperation with the detection equipment, and the connecting seat is electrically connected with the detection equipment to realize the conduction of each probe so as to realize the transmission of signals; in the detection process, negative pressure is provided through a luer connector, blood or tissue fluid is extracted from human tissues, and the stability of the detected tissues is ensured; the sliding of the push button realizes the bending function of the bending section, ensures the detection of the detection mechanism on each direction in the human body, and improves the authenticity and the accuracy of the detection.

In the present application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first feature or the second feature or indirectly contacting the first feature or the second feature through an intermediate.

Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lower level than the second feature.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A bioimpedance detection catheter, comprising: the device comprises an operating handle, a catheter, a detection mechanism and a bending adjusting mechanism;

the catheter includes: an insertion section and a bending section;

2. The bioimpedance detection catheter according to claim 1, wherein said bend adjustment mechanism comprises: the riveting pipe, the spring and the pull wire;

the riveting pipe is arranged on the insulating base;

one end of the stay wire is connected with the riveting pipe, the other end of the stay wire is connected with the stay wire fixing column, and the spring is positioned in the insertion section.

3. The bioimpedance detection catheter according to claim 2, wherein said operating handle further comprises: fixing the knob;

the shell is provided with a threaded hole;

the fixing knob is meshed with the threaded hole and extends into the shell, and the fixing knob is used for limiting the sliding of the sliding block when being screwed.

4. The bioimpedance detection catheter according to claim 2, wherein a stay wire groove is formed in a side wall of the insulation base, and a stay wire guide channel is formed in an inner wall of the bending adjusting section;

the riveting tube is embedded in the stay wire groove, and the stay wire penetrates through the stay wire guide channel.

5. The bioimpedance detection catheter according to claim 2, wherein said housing is provided with a wire arranging groove for said wire to be inserted in.

6. The bioimpedance detection catheter of claim 1, wherein said probe aperture is a stepped bore;

the limiting step is used for abutting against a step shoulder of the probe hole, and the connecting hole is used for inserting the lead.

7. The bioimpedance detection catheter according to claim 6, wherein an outer side of said wire is covered with an insulating layer, and an outer side of said insulating layer is covered with a shielding layer.

8. The bioimpedance detection catheter according to any one of claims 1 to 7, further comprising: a negative pressure suction mechanism;

the insulating base is provided with a negative pressure suction hole;

the negative pressure suction tube is arranged in the guide tube in a penetrating mode, one end of the negative pressure suction tube is arranged on the insulating base and communicated with the negative pressure suction hole, and the other end of the negative pressure suction tube is connected with the Ruhr joint.

9. The bioimpedance detection catheter of claim 8, wherein said negative pressure suction aperture is a stepped aperture;

the negative pressure suction tube penetrates through the negative pressure suction hole and is abutted against the step shoulder of the negative pressure suction hole.

10. The bioimpedance detection catheter according to claim 8, wherein said operation handle is provided with a negative pressure suction tube arrangement groove for insertion of said negative pressure suction tube.