CN112137658A - Inner core, sheath tube, biopsy device and use method of biopsy device - Google Patents

Abstract

The invention provides an inner core which is applied to a sheath tube and comprises a core body and at least one group of elastic structures, wherein the elastic structures are connected with the core body in a sliding mode, and the number of the elastic structures in the group is even, and the elastic structures are used for applying two forces which are opposite in direction and same in size to the core body. The inner core comprises at least one group of elastic structures, the number of the elastic structures is even, the elastic structures are used for applying two forces with opposite directions and the same magnitude to the core, and after part of the elastic structures are extracted, the core can be bent due to uneven stress, so that the sheath tube can be guided. The invention also provides a sheath, a biopsy device and a use method of the biopsy device.

Description

Inner core, sheath tube, biopsy device and use method of biopsy device

Technical Field

The invention relates to the technical field of medical instruments, in particular to an inner core, a sheath tube, a biopsy device and a using method of the biopsy device.

Background

For tumors (e.g., bronchopulmonary carcinoma) or infectious lung disease in surrounding lung tissue, or other intraluminal diseases, it is desirable to take tissue samples from the surrounding tissue from which the patient's disease is diagnosed. However, in the conventional sampling device, the sheath is made of a soft material, and when the sheath reaches a position where a human body lumen needs to be bent, the sheath is difficult to pass through due to lack of guiding force and is easy to bend, and the problems of the superfine sheath are particularly obvious.

Chinese patent publication No. CN103284775A discloses an intracranial thrombus extraction device, which comprises an embolectomy system, a delivery and detachment system, a handle system, and a guiding sheath made of polytetrafluoroethylene, wherein the sheath is soft and is difficult to pass through a position to be bent in a human body lumen and is easy to bend.

Therefore, there is a need for a novel core, sheath, biopsy device and method of using a biopsy device to solve the above-mentioned problems of the prior art.

Disclosure of Invention

The invention aims to provide an inner core, a sheath tube, a biopsy device and a using method of the biopsy device.

In order to achieve the above object, the inner core of the present invention, applied to a sheath, comprises:

a core, a flexible material; and the number of the first and second groups,

the elastic structures are connected with the core body in a sliding mode, and the number of the elastic structures is even, so that two forces which are opposite in direction and same in magnitude are applied to the core body.

The invention has the beneficial effects that: the sheath tube guiding device comprises at least one group of elastic structures, wherein the number of the elastic structures in the group is even, the elastic structures are used for applying two forces with opposite directions and the same magnitude to the core body, and after part of the elastic structures are extracted, the core body can be bent due to uneven stress, so that the sheath tube can be guided.

Preferably, a tube cavity matched with the elastic structure is arranged in the core body, and the elastic structure is arranged in the tube cavity and is in sliding connection with the tube cavity.

Preferably, a handle is provided at one side of the core body for a user to hold.

Further preferably, a cavity is formed in the handle, a shifting knob in sliding connection is arranged in the cavity, one end of the shifting knob extends to the outer side of one end of the cavity and is connected with the elastic structure, and the other side of the shifting knob extends to the outer side of the other side of the cavity.

Further preferably, a cross-section of the elastic structure perpendicular to the direction of extension is not circular. The beneficial effects are that: the elastic structure is prevented from rotating, so that the direction of force is prevented from changing.

Further preferably, the material of the elastic structure is a memory metal. The beneficial effects are that: the memory metal has lasting elasticity, and the elastic structure is prevented from losing elasticity.

The present invention also provides a sheath, comprising:

a pipe body in a hollow pipe shape; and the number of the first and second groups,

the inner core is arranged in the tube body.

The sheath tube has the beneficial effects that: the sheath tube comprises at least one group of elastic structures, wherein the number of the elastic structures is even, the elastic structures are used for applying two forces with opposite directions and the same size to the core body, after part of the elastic structures are extracted, the core body can be bent due to uneven stress, so that the sheath tube is guided, and the inner core can support the tube body and prevent the tube body from being bent.

Preferably, the outer diameter of the pipe body is 1.6-1.65 mm.

Preferably, the inner diameter of the pipe body is 1-1.2 mm.

Preferably, one end of the tube body is provided with a sheath tube connecting port.

Preferably, the sheath tube further comprises a locking structure arranged outside the tube body and used for locking the position of the tube body in the human body lumen.

Further preferably, the locking structure is an air bag, and the air bag is provided with at least one inflation hole for communicating with the air delivery pipe.

The present invention also provides a biopsy apparatus comprising:

a sheath tube; and the number of the first and second groups,

and the sampling instrument is used for sampling the target position of the human body lumen through the sheath.

The invention also provides a using method of the biopsy device, which comprises the following steps:

s1: extending the sheath into a human body lumen;

s2: when the sheath tube reaches a position needing bending, part of the elastic structure is extracted, so that the inner core is stressed unevenly to be bent, and the tube body is driven to bend to pass through the bending position;

s3: and repeatedly executing the step S2 until the sheath reaches the target position, and then extracting the inner core and extending into a sampling instrument.

Drawings

FIG. 1 is a schematic structural view of a sheath according to the present invention;

FIG. 2 is a schematic structural view of the core of the present invention;

FIG. 3 is a cross-sectional view taken along s-s' of FIG. 2 in accordance with some embodiments of the present invention;

FIG. 4 is a cross-sectional view taken along s-s' of FIG. 2 in accordance with still further embodiments of the present invention;

FIG. 5 is a schematic view of the sheath tube of the present invention inserted into the trachea;

FIG. 6 is a schematic view showing a sheath with a first elastic structure removed;

FIG. 7 is a schematic view showing a sheath inserted into a right bronchus according to the present invention;

FIG. 8 is a schematic view showing a sheath with a second elastic structure removed according to the present invention;

FIG. 9 is a schematic view showing the state of the sheath with the inner core removed according to the present invention;

FIG. 10 is a schematic view of a sampling device of the present invention inserted into a tubular body.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the word "comprising" and similar words are intended to mean that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.

In view of the problems in the prior art, an embodiment of the present invention provides a biopsy device, which includes a sheath and a sampling instrument, wherein the sampling instrument is used for sampling a target position of a human body lumen through the sheath.

Fig. 1 is a schematic structural view of a sheath according to some embodiments of the present disclosure. Referring to fig. 1, the sheath 10 includes a tube body 11 and an inner core 12. The pipe body 11 is in a hollow tubular shape and is made of a flexible material; the inner core 12 is disposed in the tube 11 and is used for supporting the tube 11 and driving the tube 11 to bend.

In some embodiments, the outer diameter of the pipe body is 1.6-1.65 mm, and the inner diameter of the pipe body is 1-1.2 mm. Specifically, the internal diameter size of body is 1.2 mm.

Referring to fig. 1, one end of the tube body 11 is provided with a sheath connection port 111 for inserting a sampling instrument and the inner core 12, and the outer side of one end of the tube body 11 is provided with a locking structure 112 for locking the tube body 11 at a position in the body lumen. Preferably, the locking structure 112 is an air bag, and the air bag is provided with at least one inflation hole (not shown), and the inflation hole is communicated with the air pipe (not shown). The length of the air bag is 5-10mm when the air bag is not inflated, the air bag is attached to the outer wall of the tube body 11, the air bag is expanded when the air bag is inflated, and an oval or round shape is formed on the outer side of the tube body 11, so that the outer wall of the air bag presses the lumen of a human body, and the tube body 11 is fixed. Further, the gas pipe is disposed on the outer side or the inner side of the pipe body 11.

Fig. 2 is a schematic structural view of an inner core in some embodiments of the present invention. Referring to fig. 2, the inner core 12 includes a core 121 and at least one set of resilient structures 122. The core body 121 is made of a flexible material; the elastic structures 122 are slidably connected to the core 121, and an even number of the elastic structures 121 are used for applying two forces with opposite directions and the same magnitude to the core 121.

Referring to fig. 2, a handle 123 is provided at one side of the core body 121 for a user to hold. Further, be equipped with cavity 1231 in the handle 123, cavity 1231 with elastic construction 122 one-to-one sets up, be equipped with sliding connection's group in the cavity 1231 and turn round 1232, the one end that the group turned round 1232 extends to the one end outside of cavity 1231 with elastic construction 122 is connected, the other side that the group turned round 1232 extends outside the other side of cavity.

In some embodiments of the present invention, a lumen adapted to the elastic structure is disposed in the core, and the elastic structure is disposed in the lumen and slidably connected to the lumen.

FIG. 3 is a schematic cross-sectional view taken along s-s' of some embodiments of FIG. 2. Referring to fig. 3, the inner core comprises a set of the elastic structures, a set of the elastic structures comprises a first elastic structure 1221 and a second elastic structure 1222, and a first lumen 1211 and a second lumen 1212 are provided in the core. The first elastic structure 1221 is slidably disposed in the first elastic lumen 1211, and the bending force of the first elastic structure 1221 is directed to the a direction, i.e. horizontally to the left; the second elastic structure 1222 is slidably disposed in the second lumen 1212, and the bending force of the second elastic structure 1222 is toward the b direction, i.e., horizontally to the right. More specifically, the bending forces of the first elastic structure 1221 and the second elastic structure 1222 are in the same horizontal plane.

FIG. 4 is a schematic cross-sectional view taken along s-s' of still another embodiment of FIG. 2. Referring to fig. 4, the inner core comprises two sets of said elastic structures, one set comprising a first elastic structure 1221 and a second elastic structure 1222, and the other set comprising a third elastic structure 1223 and a fourth elastic structure 1224, and a first lumen 1211, a second lumen 1212, a third lumen 1213 and a fourth lumen 1214 are provided in the core. The first elastic structure 1221 is slidably disposed in the first lumen 1211, and the bending force of the first elastic structure 1221 is directed to the a direction, i.e. horizontally to the left; the second elastic structure 1222 is slidably disposed in the second lumen 1212, and the bending force of the second elastic structure 1222 is toward the b direction, i.e. horizontally to the right; the third elastic structure 1223 is slidably disposed within the third lumen 1213, and the bending force of the third elastic structure 1223 is directed in the c-direction, i.e., vertically upward; the fourth elastic structure 1224 is slidably disposed within the fourth lumen 1214, and the bending force of the fourth elastic structure 1224 is directed in the d-direction, i.e., vertically downward. More specifically, the bending forces of the first elastic structure 1221 and the second elastic structure 1222 are in the same horizontal plane, and the bending forces of the third elastic structure 1223 and the fourth elastic structure 1224 are in the same vertical plane.

In some embodiments of the invention, the shape of the cross section of the accommodating cavity perpendicular to the length direction is the same as the shape of the cross section of the elastic structure perpendicular to the length direction, and the maximum width of the cross section of the accommodating cavity perpendicular to the length direction is slightly greater than the maximum width of the cross section of the elastic structure perpendicular to the length direction, so that the driving structure does not shake in the accommodating cavity and can slide relatively. Furthermore, the cross section of the elastic structure perpendicular to the extension direction is not circular, so that the elastic structure is prevented from rotating to cause the change of the direction of force. Furthermore, the size and the shape of the cross section of the elastic structure perpendicular to the length direction are the same.

In some preferred embodiments of the present invention, the material of the elastic structure is a memory metal, so as to prevent the elastic structure from losing elasticity.

There is also provided in some embodiments of the present invention a method of using a biopsy device, comprising the steps of:

s1: extending the sheath into a human body lumen;

s2: when the sheath tube reaches a position needing bending, part of the elastic structure is extracted, so that the inner core is stressed unevenly to be bent, and the tube body is driven to bend to pass through the bending position;

s3: and repeatedly executing the step S2 until the sheath reaches the target position, and then extracting the inner core and extending into a sampling instrument.

In some embodiments, a method of using a biopsy device, the method of using a biopsy device comprising:

as shown in fig. 5, the sheath tube 10 is inserted into the trachea 13, and a left bronchus 14 and a right bronchus 15 are connected to the lower side of the trachea 13;

when the lesion is located in the right bronchus 15, as shown in fig. 6, the first elastic structure 1221 is removed, and the inner core 12 is bent to the right side by the second elastic structure 1222, so that the inner core 12 causes the tube body 11 to be bent to the right side;

as shown in fig. 7, when the sheath 10 is bent and then continues to extend into the sheath 10, the sheath 10 will extend into the right bronchus 15 with little resistance;

as shown in fig. 8, after the sheath 10 reaches the lesion, the second elastic structure 1222 is removed to remove the force of the second elastic structure 1222 on the inner core 12, thereby greatly reducing the force of the inner core 12 on the tube body 11 to facilitate the removal of the inner core 12;

as shown in fig. 9, the inner core 12 is removed, and the tube 11 is retained in the right bronchus 15;

as shown in fig. 10, a sampling device 16 is extended along the tube 11 into the lesion of the right bronchus 15 for sampling.

Although the embodiments of the present invention have been described in detail hereinabove, it is apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it is to be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the following claims. Moreover, the invention as described herein is capable of other embodiments and of being practiced or of being carried out in various ways.

Claims (14)

1. An inner core for use in a sheath, comprising:

a core, a flexible material; and the number of the first and second groups,

the elastic structures are connected with the core body in a sliding mode, and the number of the elastic structures is even, so that two forces which are opposite in direction and same in magnitude are applied to the core body.

2. The inner core according to claim 1, wherein a lumen adapted to the elastic structure is provided in the core, and the elastic structure is provided in the lumen and slidably connected to the lumen.

3. The core as claimed in claim 1, wherein a handle is provided on one side of the core for a user to hold.

4. The inner core according to claim 3, wherein a cavity is formed in the handle, a sliding-connection shifting knob is arranged in the cavity, one end of the shifting knob extends to the outside of one end of the cavity to be connected with the elastic structure, and the other side of the shifting knob extends to the outside of the other side of the cavity.

5. A core according to any of claims 1 to 4, wherein the cross-section of the resilient structure perpendicular to the direction of extension is not circular.

6. A core according to any one of claims 1 to 4, wherein the material of the resilient structure is a memory metal.

7. A sheath, comprising:

a pipe body in a hollow pipe shape; and the number of the first and second groups,

an inner core according to any one of claims 1 to 6, disposed within the tube.

8. The sheath of claim 7, wherein the outer diameter of the tube body is 1.6-1.65 mm.

9. The sheath of claim 7, wherein the inner diameter of the tube body is 1-1.2 mm.

10. The sheath of claim 7, wherein one end of the tube body is provided with a sheath connection port.

11. The sheath of claim 7, further comprising a locking structure provided on an outer side of the tube body for locking a position of the tube body in a human body lumen.

12. The sheath of claim 11, wherein the locking structure is an air bag, and the air bag is provided with at least one inflation hole for communicating with an air delivery pipe.

13. A biopsy device, comprising:

the sheath of any one of claims 7 to 12; and the number of the first and second groups,

and the sampling instrument is used for sampling the target position of the human body lumen through the sheath.

14. A method of using the biopsy device of claim 13, comprising the steps of:

s1: extending the sheath into a human body lumen;

s2: when the sheath tube reaches a position needing bending, part of the elastic structure is extracted, so that the inner core is stressed unevenly to be bent, and the tube body is driven to bend to pass through the bending position;

s3: and repeatedly executing the step S2 until the sheath reaches the target position, and then extracting the inner core and extending into a sampling instrument.

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