CN217162169U - Medical sheath - Google Patents

Abstract

The embodiment of the utility model discloses a medical sheath, which comprises an insertion component and a positioning component, wherein the insertion component is used for inserting the organism of an organism and comprises an outer pipe and an inner pipe with a hollow structure, and the outer pipe is wrapped on the outer wall of the inner pipe; the positioning assembly is positioned at one end of the insertion assembly, is arranged between the outer tube and the inner tube and is used for positioning the position of the end in the muscle body. The utility model discloses medical treatment sheath pipe, when being used as the sheath pipe of biopsy instrument, through the position of the head end of the definite biopsy instrument that locating component can be accurate for the focus sample is more accurate, and then promotes the accuracy nature of biopsy.

Description

Medical sheath

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a medical treatment sheath pipe.

Background

In modern medicine, endoscopy has become increasingly important for the early detection and treatment of tumors. The conventional endoscopy can enter a natural cavity of a human body to acquire an image at the front end of the endoscope for observation, and biopsy tools are used for clamp examination, brush examination and needle suction examination of living tissues, so that the diseases are correctly diagnosed. Usually these biopsy procedures are performed under direct vision under an endoscopic imaging system. However, for the focus which can not be reached and visualized by the endoscope in the natural orifice depth or the orifice wall thickness, the doctor can not visually identify through the imaging system, so that the biopsy tool can not be accurately positioned, and therefore the tissue of the target focus can not be obtained or the tissue which is not the target focus can not be obtained, and misdiagnosis can be caused.

In some biopsy tools, the front end of the biopsy tool can be provided with a positioning assembly to position the biopsy tool, so that the front end of the biopsy tool has high hardness, the bending of the head end of the endoscope can be affected, the operation efficiency of the endoscope is further affected, the endoscope cannot reach certain special-shaped air passages, and certain limitation is provided for the use of the endoscopes. If a guide tube with a relatively low head end hardness is used, the guide tube is replaced by a biopsy tool for biopsy after passing through the special-shaped air passage, a positioning signal is lost temporarily in the replacement process, and whether the position of the head end of the endoscope or the head end of the sheath tube deviates or not cannot be determined, so that the use efficiency of the endoscope is influenced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a medical treatment sheath pipe, cooperation biopsy instrument uses, carries out accurate location to the head end of biopsy instrument, and then carries out accurate sample to the focus, promotes the accuracy nature of biopsy.

The embodiment of the utility model provides a medical treatment sheath pipe, it includes:

the insertion assembly is used for inserting the organism of an organism and comprises an outer pipe and an inner pipe in a hollow structure, wherein the outer pipe is wrapped on the outer wall of the inner pipe;

and the positioning assembly is positioned at one end part of the insertion assembly, is arranged between the outer pipe and the inner pipe and is used for positioning the position of the end part in the muscle body.

Further, still include the weaving layer, the weaving layer parcel is in on the outer wall of inner tube, the locating component is established outer tube with between the weaving layer.

Furthermore, the bending control device also comprises a bending control steel wire, one end of the bending control steel wire is fixed at the end part of the outer pipe close to the positioning component, and the other end of the bending control steel wire extends out of the end part of the outer pipe far away from the positioning component.

Furthermore, a groove is formed in the outer wall of the outer pipe, and the bending control steel wire is arranged in the groove and can move in the groove;

or, be equipped with the steel wire slide in the outer tube, the accuse curved steel wire is established in the steel wire slide, and can move in the steel wire slide.

Further, the outer tube is made of a material including at least one of PE, PP, POM, PTFE, PI, PA, PEEK and PEBAX.

Further, the material of the inner tube comprises at least one of PE, PP, POM, PTFE, PI, PA, PEEK and PEBAX.

Furthermore, the braided layer is a multilayer braided tube with a PTFE layer, a stainless steel braided wire layer and a PEBAX layer from inside to outside, a plastic tube, a hollow steel wire rope wound by a plurality of strands of stainless steel wires, and any one of bendable thin-wall stainless steel tubes, or formed by splicing a plurality of structural forms.

Further, the plastic material of the plastic pipe is at least one of PE/PP/POM/PTFE/PI/PA/PEEK.

Further, the positioning assembly comprises a magnetic navigation positioning sensor and a sensor protection shell;

the sensor protective housing is arranged between the outer pipe and the woven layer at the end part, and the magnetic navigation positioning sensor is arranged in the sensor protective housing.

Furthermore, the sensor protective housing is close to the one end of tip is the blind end, keeps away from the one end of tip is the open end, is annular magnetic navigation positioning sensor follows the open end gets into in the sensor protective housing and be close to the blind end.

Furthermore, the positioning assembly further comprises a sensor cable, the sensor cable is arranged between the outer pipe and the woven layer, one end of the sensor cable enters from the open end and is connected with the magnetic navigation positioning sensor, and the other end of the sensor cable is used for being connected with magnetic navigation positioning equipment.

Further, the manufacturing material of the sensor protection shell comprises stainless steel.

The utility model discloses medical treatment sheath is in the same place through outer tube and the inner tube parcel that is hollow structure and is formed the insertion assembly who is used for inserting the organism to set up locating component between the outer tube of a tip of insertion assembly and inner tube, be used for fixing a position to its tip in the organism, and then when using it as the sheath of biopsy instrument, can accurate definite biopsy instrument's position of head end, make the focus sample more accurate, and then promote the accuracy nature of biopsy.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a schematic cross-sectional view of a medical sheath according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a medical sheath according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a schematic cross-sectional view of a positioning assembly of a medical sheath according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of an outer tube of a medical sheath according to an embodiment of the present invention;

fig. 6a is a schematic cross-sectional view of an outer tube of a medical sheath according to an embodiment of the present invention;

fig. 6b is a schematic cross-sectional view of an outer tube of a medical sheath according to an embodiment of the present invention;

fig. 7-14 are schematic flow charts illustrating a method for operating a medical sheath according to an embodiment of the present invention.

Detailed Description

To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, a schematic cross-sectional view of a medical sheath according to an embodiment of the present invention is shown, the medical sheath includes an insertion component 10 and a positioning component 20.

The insertion assembly 10 is used for inserting into the body of a living body, and comprises an outer tube 110 and an inner tube 120 with a hollow structure, wherein the outer tube 110 is wrapped on the outer wall of the inner tube 120;

the positioning assembly 20 is located at one end 130 of the insertion assembly 10, and is disposed between the outer tube 110 and the inner tube 120 for positioning the end 130 in the body.

Specifically, the insertion assembly 10 is used for inserting into a living body, such as an animal body and a human body, and the like, which is described herein as an example of a human body, the insertion assembly 10 enters the human body under the action of a mechanical or manual force, the inner tube 120 has a hollow structure, and a biopsy tool, such as a biopsy forceps, a biopsy brush, a biopsy needle, and the like, is inserted into the hollow structure, and a front end (such as a forceps head, a bristle end, a needle head, and the like) of the biopsy tool enters from an end opposite to the end 130, and exits from the end 130, and rests at a position close to the end 130;

the outer tube 110 is wrapped on the outer wall of the inner tube 120, and the two are stacked and sleeved, and the connection mode between the two includes but is not limited to bonding, integral molding and injection molding; the positioning assembly 20 is disposed in the interlayer between the outer tube 110 and the inner tube 120, specifically, at a position close to the end portion 130, where a positioning sensor is disposed inside the positioning assembly 20, including but not limited to a magnetic navigation positioning sensor, for positioning, and since the positioning assembly 20 is disposed at a position close to the end portion 130, when the medical sheath is inserted into a human body, the position of the end portion 130 in the human body can be located by the positioning assembly 20, that is, the position of the end portion 130 in the human body can be located;

and because the front end of the biopsy tool is close to the end part 130, the location assembly 20 can be used for locating the position of the end part 130 in the human body, namely, the location assembly 20 can locate the front end of the biopsy tool in the medical sheath, so that the position of the front end of the biopsy tool can be accurately determined, the lesion sampling is more accurate, and the biopsy accuracy is further improved.

It should be noted that in order to improve the accuracy of the positioning assembly 20 with respect to the front end of the biopsy tool, the positioning assembly 20 should be positioned as close as possible to the end 130; in addition, since the front end of the biopsy tool extends out of the end 130 for a distance that is generally fixed and known for performing a biopsy operation, when the front end of the biopsy tool is located by the locating component 20, the locating data of the front end of the biopsy tool can be corrected or compensated for by the fixed and known distance to obtain a more precise location of the front end of the biopsy tool, so as to further improve the accuracy of sampling the lesion and further improve the accuracy of biopsy.

Referring to fig. 2, 3 and 4, in another preferred embodiment of the present invention, the medical sheath further includes a woven layer 30, the woven layer 30 is wrapped on the outer wall of the inner tube 120, and the positioning component is disposed between the outer tube 110 and the woven layer 30.

Here, the braided layer 30 is sandwiched between the inner tube 120 and the outer tube 110, specifically, the braided layer 30 is wrapped on the outer wall of the inner tube 120 and tightly connected to the inner wall of the outer tube 110, and at this time, the positioning assembly 20 is disposed between the outer tube 110 and the braided layer 30, where the flexibility of the medical sheath tube can be improved by the disposition of the braided layer 30, and the strength of the bond between the inner tube 120 and the outer tube 110 can also be improved.

It should be noted that the positioning assembly 20 may be connected to the outer wall of the inner braided layer 30 or the inner wall of the outer tube 110, and the lamination between the braided layer 30 and the outer tube 110 may make the positioning assembly 20 more stable and less prone to deformation and dislocation.

Further, the outer tube 110 is made of a material including at least one of PE, PP, POM, PTFE, PI, PA, PEEK, and PEBAX. Here, the outer tube 110 made of these materials has the following characteristics: good and stable consistent performance at low temperatures; no loss of mechanical properties under repeated deformation, and fatigue resistance; good resilience and elastic recovery; precise dimensional stability; and excellent workability, thereby reducing discomfort when the medical sheath is inserted into a living body, reducing damage to the living body, and improving operability of the medical sheath.

Further, the inner tube 120 is made of a material including at least one of PE, PP, POM, PTFE, PI, PA, PEEK, and PEBAX. Here, the inner tube 120 made of these materials also has the following characteristics: has the characteristics of acid resistance, alkali resistance and various organic solvents resistance, and is almost insoluble in all solvents; the biopsy instrument is high-temperature resistant, has low friction coefficient, can reduce the surface motion resistance of the inner wall of the inner tube 120, improves the smoothness of the biopsy instrument when reciprocating in the inner tube 120, and improves the operability of the biopsy instrument when the biopsy instrument is matched with the medical sheath tube for use.

Furthermore, the braided layer 30 is a multi-layer braided tube with a PTFE layer, a stainless steel braided wire layer and a PEBAX layer from inside to outside, a plastic tube, a hollow steel wire rope wound by a plurality of stainless steel wires, a bendable thin-walled stainless steel tube, or a plurality of sections of the above structural forms.

The multilayer structure braided tube is respectively a PTFE layer, a stainless steel braided wire layer and a PEBAX layer from inside to outside, wherein the material of the PEBAX layer at the outermost layer can be consistent with that of the outer tube 110, so that the connection stability between the two layers is improved; the material of the PTFE layer of the innermost layer is consistent with that of the inner pipe 120, so as to improve the stability of the connection between the two; the stainless steel braided wire layer in the middle layer can improve the strength of the medical sheath tube and meanwhile can enable the medical sheath tube to have certain flexibility.

Furthermore, in other preferred embodiments of the present invention, the plastic material of the plastic tube is at least one of PE/PP/POM/PTFE/PI/PA/PEEK.

Specifically, the plastic tube has certain elastic energy which is changed along with the shape of the body tissue cavity, so that the biopsy tool can enter the body tissue under the manual or mechanical action and reach the target lesion position conveniently, the radial direction of the plastic tube has higher strength, a reciprocating channel can be provided for the medical sheath tube, the relative motion between the biopsy tool and the medical sheath tube is convenient, and the front end of the biopsy tool can extend out of or retract into the medical sheath tube.

The hollow steel wire rope wound by the multiple strands of stainless steel wires is spirally wound by multiple strands of stainless steel round wires/flat wires and comprises multiple layers.

The number of the multi-strand stainless steel round wires/flat wires is N, and the number of N is 4-12.

The number of the multiple layers is N, and the number of N is 1-3.

The bendable thin-wall stainless steel pipe has good radial strength and flexibility so as to meet the use performance of the medical sheath pipe.

In practical applications, the woven layer 30 may be a product in the above single structural form, or a product formed by splicing a plurality of structural forms.

In addition, the positioning assembly 20 includes a magnetic navigation positioning sensor 210 and a sensor protection casing 220;

the sensor protective sheath 220 is disposed between the outer tube 110 of the end 130 and the woven layer 30, and the magnetic navigation positioning sensor 210 is disposed within the sensor protective sheath 220.

Specifically, the locating component 20 is composed of the sensor protective housing 220 and the magnetic navigation locating sensor 210 arranged inside the sensor protective housing 220, the sensor protective housing 220 protects the magnetic navigation locating sensor 210, and the magnetic navigation locating sensor 210 can transmit locating data to a magnetic navigation locating device connected with the medical sheath, so as to obtain specific position information of the end portion of the medical sheath in the human body, that is, the head end of the biopsy tool is located. Here, the magnetic navigation positioning sensor 210 is a hollow ring structure, and the biopsy tool of a metal structure can pass through the hollow ring structure in a reciprocating manner without affecting the positioning function of the magnetic navigation positioning sensor 210.

It should be noted that the connection between the magnetic navigation positioning sensor 210 and the magnetic navigation positioning device may be a wireless connection, such as a bluetooth connection, an NFC connection, or a wired connection through a data cable.

Further, one end of the sensor protection casing 220 close to the end 130 is a closed end 2201, and one end of the sensor protection casing away from the end 130 is an open end 2202, and the magnetic navigation positioning sensor 210 in a ring shape enters the sensor protection casing 220 from the open end 2202 and is close to the closed end 2201.

Specifically, the magnetic navigation positioning sensor 210 is in a ring structure, the sensor protective housing 220 is a hollow ring structure matched with the sensor protective housing, the closed end 2201 is close to the end portion 130, the open end 2202 is far away from the end portion 130, the magnetic navigation positioning sensor 210 enters the sensor protective housing 220 from the open end 2202 and is arranged close to the closed end 2201, so that the magnetic navigation positioning sensor is closer to the end portion 130, and further closer to the front end of the biopsy tool, and the positioning accuracy of the magnetic navigation positioning sensor is improved.

Further, the positioning assembly 20 further comprises a sensor cable 230, wherein the sensor cable 230 is disposed between the outer tube 110 and the braided tube 30, and has one end entering from the open end 2202 to be connected to the magnetic navigation positioning sensor 210 and the other end used for connecting to a magnetic navigation positioning device.

Here, the two ends of the sensor cable 230 are respectively connected to the magnetic navigation positioning device and the magnetic navigation positioning sensor 210 for data transmission. Specifically, one end of the sensor cable 230 enters the sensor protective casing 220 through the open end 2202 and is connected to the magnetic navigation positioning sensor 210, and the other end of the sensor cable passes through between the outer tube 110 and the woven layer 30 and is connected to the external magnetic navigation positioning device.

In addition, the material of the sensor protection casing 220 includes stainless steel.

Here, the stainless steel protective case 220 may not only protect the magnetic navigation positioning sensor 210 well, but also ensure that the magnetic navigation positioning sensor 210 may work normally under the action of a magnetic field, thereby improving the reliability of the positioning of the magnetic navigation positioning sensor 210.

Further, please refer to fig. 5, which is a schematic perspective view illustrating an outer tube of a medical sheath according to an embodiment of the present invention, the medical sheath further includes a bending control wire 40, one end of the bending control wire 40 is fixed at an end of the outer tube 110 close to the positioning component 20, and the other end of the bending control wire extends out of an end of the outer tube 110 far from the positioning component 20.

Specifically, the first end 410 of the bend-controlling steel wire 40 is a fixed end, and the second end 420 of the bend-controlling steel wire 40 is a free end, wherein the first end 410 is fixedly connected to the end of the outer tube 110 close to the positioning assembly 20, and may be a metal fixing ring disposed at the end of the outer tube 110 close to the positioning assembly 20, the first end 410 is welded to the metal fixing ring, and the second end 420 extends out of the end of the outer tube 110 away from the positioning assembly 20, and is used for connecting an external pulling mechanism or pushing mechanism.

It is mentioned above that the bending control steel wire 40 can bend the front end of the medical sheath at a certain angle when in use, and the bending angle is uncertain, and the bending can be performed according to the practical application scene of the medical catheter. In addition, the bend-controlling steel wire 40 may not be provided, different bending angles may be preset during the production of the medical sheath, and the medical sheath with different bending angles may be selected according to different usage scenarios, where the preset bending angle includes, but is not limited to, 45 °, 90 °, 180 °, and the like.

Further, please refer to fig. 6a and fig. 6b, which are schematic cross-sectional views of an outer tube of a medical sheath according to an embodiment of the present invention, a groove 1101 is formed on an outer wall of the outer tube 110, and the bend-controlling wire 40 is disposed in the groove 1101 and can move in the groove 1101;

or, a steel wire slideway 1102 is arranged in the outer tube 110, and the bend-controlling steel wire 40 is arranged in the steel wire slideway 1102 and can move in the steel wire slideway 1102.

Specifically, referring to fig. 6a, at least one groove 1101 is formed in the outer wall of the outer tube 110, as shown in the figure, 4 grooves 1101 are taken as an example for illustration, each groove 1101 is provided with one bend-controlling steel wire 40, the first end 410 of each bend-controlling steel wire 40 is fixed, the second end 420 of each bend-controlling steel wire 40 applies a certain pulling force through an external force, so that the bend-controlling steel wires 40 can move in the grooves 1101, and the first end 410 can be bent at different angles by pulling the bend-controlling steel wires 40 at different positions on the outer wall of the outer tube 110.

Specifically, please refer to fig. 6b, at least one wire slideway 1102 is disposed inside the outer tube 110, for example, 4 wire slideways 1102 are illustrated in the figure, each wire slideway 1102 is provided with one bend-controlling wire 40 therein, the first end 410 of the bend-controlling wire 40 is fixed, the second end 420 of the bend-controlling wire 40 applies a certain pulling force through an external force, so that the bend-controlling wire 40 can move in the wire slideway 1102, and the bend-controlling wires 40 at different positions on the outer wall of the outer tube 110 are pulled, so that the first end 410 can be bent at different angles.

In addition, it should be noted that the bend-controlling steel wire 40 is a single stainless steel round wire or flat wire, or a steel wire rope wound by multiple stainless steel round wires.

The method for using the medical sheath will be described in detail below, and the procedure and method for forming the magnetic navigation positioning sheath under the magnetic navigation condition and performing the lung positioning biopsy by using the biopsy forceps will be described as an example. Fig. 7-14 are schematic flow charts of methods for performing a lung localization biopsy.

S100: CT images are imported and three-dimensional models of the pulmonary bronchial tree structure and of the pulmonary vessels (arteries and veins) are reconstructed.

In step 100, the pulmonary bronchi and pulmonary vessels need to use different thresholds, respectively, in order to be separated from other tissues. The reconstructed bronchus and blood vessel models need to be superposed in the same three-dimensional model for observation (different color regions can be adopted for the bronchus and blood vessel models).

S200, a focus point A needing sampling is outlined, and the focus point A is shown in figure 7.

S300, using the focus point a as the navigation path end point, according to the magnetic navigation path planning procedure in the prior art, a navigation path from the main carina to the focus point a is planned, as shown in fig. 8.

S400, the positioning sheath is arranged in a working channel of the bronchoscope in a penetrating mode, the biopsy tool is arranged in the positioning sheath in a penetrating mode, and the positioning sheath is connected with a magnetic navigation positioning system.

S500, operating the bronchoscope to reach the focus point A along the navigation path, as shown in figure 9.

S600, operating the handle of the biopsy forceps to perform biopsy sampling, as shown in figure 10.

Specifically, the coordinates of the path actually traversed in the magnetic navigation positioning system are recorded in the process. And comparing the coordinates with navigation path coordinates in the three-dimensional model of the bronchial tree structure, so as to correct the coordinates of the focus point A to be reached in the magnetic navigation positioning system to be matched with the coordinates in the three-dimensional model of the bronchial tree structure, thereby reducing positioning errors and errors of later in vivo sampling and improving the accuracy.

Alternatively, in steps S200-S600, if the target lesion is behind the tracheal wall or where no clear trachea is accessible, as shown at point B in fig. 11, a puncture wall breaking tool may be used to manually create a pathway to the target lesion. The method comprises the following steps:

referring to fig. 11, a lesion point B to be sampled is plotted in S200. Meanwhile, a puncture wall breaking point B' is drawn, and the position which is as close as possible to the point B or the position which is convenient for puncture is selected.

Referring to fig. 11, in S300, a main navigation path from the main carina to the puncture point B 'is planned according to the magnetic navigation path planning procedure in the prior art with the puncture point B' as the navigation path end point. Meanwhile, a puncture path from the puncture point B 'to the focus point B is planned as a secondary navigation path by taking the puncture point B' as a starting point and the focus point B as an end point.

As shown in fig. 12, in S400, the puncture wall-breaking tool is inserted into the positioning sheath to make puncture from the puncture point B' as a starting point, thereby creating a channel reaching the lesion point B.

As shown in fig. 13, in S500, the positioning sheath and the puncturing wall-breaking tool are punctured along the secondary navigation path to reach the lesion point B, and then the wall-breaking tool is withdrawn and inserted into the biopsy forceps.

Referring to fig. 14, biopsy is performed by operating the handle of the forceps in S600.

Optionally, in steps S400-S500, the positioning sheath may be inserted into the working channel of the bronchoscope, the bronchoscope is operated to reach the focal point a, and then the biopsy forceps are inserted into the positioning sheath and extended out from the distal end thereof for sampling. The reason for this is that the distal end of the biopsy forceps is a long metal entity, which affects the bending shape of the distal ends of the bronchoscope and the positioning sheath, and causes that the positioning sheath is difficult to enter by selecting the corresponding trachea bifurcation at the trachea bifurcation by using a specific bending shape, so that the positioning sheath is difficult to smoothly reach the target focus point along the navigation path, and the operation time is prolonged.

When the target focus point is located at the position where the bronchoscope cannot directly reach, the target focus point can be approached through the bronchoscope, when the bronchoscope is limited and cannot be pushed continuously, the positioning sheath tube is extended out of the working channel of the bronchoscope, and the pre-bending/bending control structure of the positioning sheath tube is utilized to continuously reach the position of the focus point along the navigation path.

Optionally, in the process of using the combination of the bronchoscope and the positioning sheath to reach the focus position, the positioning catheter can be combined at the same time, and the dual positioning signals of the positioning catheter and the positioning sheath can be fitted through software in the magnetic navigation system, so that the positioning accuracy is improved.

Optionally, in the process of taking a biopsy when the patient reaches the focus position, the biopsy tool can be simultaneously positioned, the double positioning signals of the positioning sheath and the biopsy tool can show the relative positions of the head ends of the positioning sheath and the biopsy tool, and the biopsy tool can be ensured to be completely retracted into the sheath when the sheath and the biopsy tool are withdrawn, so that accidental injury of the biopsy tool to the airway in the withdrawal process is avoided.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (9)

1. A medical sheath, comprising:

the insertion assembly is used for inserting the organism of an organism and comprises an outer pipe and an inner pipe in a hollow structure, wherein the outer pipe is wrapped on the outer wall of the inner pipe;

a positioning assembly located at one end of the insertion assembly, disposed between the outer tube and the inner tube, for positioning the position of the end within the body;

the braided layer is wrapped on the outer wall of the inner tube, and the positioning component is arranged between the outer tube and the braided layer.

2. The medical sheath according to claim 1, further comprising a bend-controlling wire, one end of the bend-controlling wire being fixed to an end of the outer tube near the positioning member, and the other end thereof protruding out of an end of the outer tube far from the positioning member.

3. The medical sheath according to claim 2, wherein a groove is provided on an outer wall of the outer tube, and the bend-controlling wire is provided in the groove and is movable in the groove;

or, be equipped with the steel wire slide in the outer tube, the accuse curved steel wire is established in the steel wire slide, and can move in the steel wire slide.

4. The medical sheath according to claim 1, wherein the braided layer is a multi-layer braided tube comprising a PTFE layer, a stainless steel braided wire layer and a PEBAX layer from the inside to the outside, a plastic tube, a hollow steel wire rope wound with a plurality of stainless steel wires, a flexible thin-walled stainless steel tube, or a plurality of the above-mentioned structures.

5. The medical sheath according to claim 4, wherein the plastic material of the plastic tube is one of PE/PP/POM/PTFE/PI/PA/PEEK.

6. The medical sheath of claim 1, wherein the positioning assembly includes a magnetic navigation positioning sensor and a sensor protective housing;

the sensor protective housing is arranged between the outer pipe and the woven layer at the end part, and the magnetic navigation positioning sensor is arranged in the sensor protective housing.

7. The medical sheath of claim 6, wherein the end of the protective sensor housing near the end is a closed end, the end far away from the end is an open end, and the magnetic navigation positioning sensor in a ring shape enters the protective sensor housing from the open end and is near the closed end.

8. The medical sheath of claim 7, wherein the positioning assembly further comprises a sensor cable disposed between the outer tube and the braid, one end entering from the open end for connection to the magnetic navigation positioning sensor and the other end for connection to a magnetic navigation positioning device.

9. The medical sheath of claim 6, wherein the protective sensor housing is made of a material comprising stainless steel.

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