Inner core, sheath, biopsy device, and method of using the biopsy device

Abstract

The present invention provides an inner core, which is applied to a sheath tube, including a core body and at least one group of elastic structures, wherein the elastic structures are slidably connected to the core body, and a group of the elastic structures is an even number, which is used to apply two forces of the same magnitude and in opposite directions to the core body. The inner core includes at least one group of elastic structures, and a group of the elastic structures is an even number, which is used to apply two forces of the same magnitude and in opposite directions to the core body. After extracting part of the elastic structures, the core body will bend due to uneven force to guide the sheath tube. The present invention also provides a sheath tube, a biopsy device, and a method for using the biopsy device.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an inner core, a sheath tube, a biopsy device and a method for using the biopsy device. Background Art

[0002] For tumors (such as bronchial lung cancer) or infectious lung diseases in the surrounding lung tissues, or other diseases in the lumen, it is necessary to obtain tissue samples from the surrounding tissues to diagnose the patient's disease. However, in existing sampling equipment, the sheaths are all made of soft materials. When reaching the position where the human lumen needs to bend, it is difficult to pass due to the lack of guiding force, and it is easy to bend. These problems are particularly obvious for ultra-thin sheaths.

[0003] A Chinese invention patent with publication number CN103284775A discloses an intracranial thrombus removal device, including a thrombus removal system, a delivery and release system, a handle system and a guide sheath. The guide sheath is made of a polymer material, polytetrafluoroethylene. Since the sheath is soft, it is difficult to pass through a position in the human body lumen that requires bending, and it is prone to bending.

[0004] Therefore, it is necessary to provide a novel inner core, sheath tube, biopsy device and method for using the biopsy device to solve the above problems existing in the prior art. Summary of the invention

[0005] The object of the present invention is to provide an inner core, a sheath tube, a biopsy device and a method for using the biopsy device.

[0006] To achieve the above object, the inner core of the present invention is applied to a sheath tube and comprises:

[0007] a core, a flexible material; and,

[0008] At least one group of elastic structures, wherein the elastic structures are slidably connected to the core body, and the number of the elastic structures in a group is an even number, and the elastic structures are used to apply two forces of the same magnitude and in opposite directions to the core body.

[0009] The beneficial effect of the present invention is that it includes at least one group of elastic structures, wherein the group of elastic structures is an even number and is used to apply two forces of the same magnitude and in opposite directions to the core body. After some of the elastic structures are extracted, the core body will bend due to uneven force to guide the sheath tube.

[0010] Preferably, a lumen adapted to the elastic structure is provided in the core body, and the elastic structure is arranged in the lumen and is slidably connected to the lumen.

[0011] Preferably, a handle is provided on one side of the core for a user to hold.

[0012] Further preferably, a cavity is provided in the handle, a slidingly connected knob is provided in the cavity, one end of the knob extends to the outside of one end of the cavity and is connected to the elastic structure, and the other side of the knob extends to the outside of the other side of the cavity.

[0013] Further preferably, the cross section of the elastic structure perpendicular to the extension direction is not circular. The beneficial effect is that the elastic structure is prevented from rotating and the direction of the force is changed.

[0014] Further preferably, the material of the elastic structure is memory metal, which has the beneficial effect that the memory metal has lasting elasticity, thereby preventing the elastic structure from losing its elasticity.

[0015] The present invention also provides a sheath tube, comprising:

[0016] a tube body in a hollow tube shape; and

[0017] The inner core is arranged in the tube body.

[0018] The beneficial effect of the sheath tube is that it includes at least one group of elastic structures, and a group of elastic structures is an even number, which is used to apply two forces of the same magnitude and in opposite directions to the core body. After some elastic structures are extracted, the core body will bend due to uneven force to guide the sheath tube, and the inner core can support the tube body to prevent the tube body from bending.

[0019] Preferably, the outer diameter of the tube body is 1.6-1.65 mm.

[0020] Preferably, the inner diameter of the tube body is 1-1.2 mm.

[0021] Preferably, a sheath connection port is provided at one end of the tube body.

[0022] Preferably, the sheath tube further comprises a locking structure, which is arranged on the outside of the tube body and is used to lock the position of the tube body in the lumen of the human body.

[0023] Further preferably, the locking structure is an airbag, and the airbag is provided with at least one inflation hole for communicating with an air pipe.

[0024] The present invention also provides a biopsy device, comprising:

[0025] sheath; and,

[0026] The sampling instrument is used for sampling a target position of a human body lumen through the sheath.

[0027] The present invention also provides a method for using a biopsy device, comprising the following steps:

[0028] S1: inserting the sheath into a lumen of a human body;

[0029] S2: When the sheath reaches a position where bending is required, a portion of the elastic structure is extracted to cause the inner core to bend due to uneven force, thereby driving the tube body to bend and pass through the bending position;

[0030] S3: Repeat step S2 until the sheath reaches the target position, then extract the inner core and insert it into the sampling instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the sheath tube of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the inner core of the present invention;

[0033] Figure 3 In some embodiments of the present invention Figure 2 Cross-section along s-s';

[0034] Figure 4 In some embodiments of the present invention Figure 2 Cross-section along s-s';

[0035] Figure 5 It is a schematic diagram of the state in which the sheath tube of the present invention is extended into the trachea;

[0036] Figure 6 A schematic diagram of the state of the sheath tube of the first elastic structure being taken out according to the present invention;

[0037] Figure 7 A schematic diagram of the state in which the sheath tube is extended into the right bronchus according to the present invention;

[0038] Figure 8 A schematic diagram of the state of the sheath tube of the second elastic structure being taken out according to the present invention;

[0039] Fig. 9 Schematic diagram of the sheath tube state of taking out the inner core of the present invention;

[0040] Fig.10 This is a schematic diagram of the state in which the sampling device of the present invention is extended into the tube body. DETAILED DESCRIPTION

[0041] In order to make the purpose, 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 in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the present invention belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0042] In view of the problems existing in the prior art, an embodiment of the present invention provides a biopsy device, including a sheath tube and a sampling instrument, wherein the sampling instrument is used to pass through the sheath tube to sample a target position of a human body lumen.

[0043] Figure 1 Schematic diagram of the structure of the sheath tube in some embodiments of the present invention. Figure 1 The sheath tube 10 includes a tube body 11 and an inner core 12. The tube body 11 is hollow and made of flexible material; the inner core 12 is disposed in the tube body 11 to support the tube body 11 and drive the tube body 11 to bend.

[0044] In some embodiments, the outer diameter of the tube is 1.6-1.65 mm, and the inner diameter of the tube is 1-1.2 mm. Specifically, the inner diameter of the tube is 1.2 mm.

[0045] Reference Figure 1 , a sheath connection port 111 is provided at one end of the tube body 11 for inserting the sampling instrument and the inner core 12, and a locking structure 112 is provided on the outside of one end of the tube body 11 for locking the tube body 11 in a position in the human body's lumen. Preferably, the locking structure 112 is an airbag, and the airbag is provided with at least one inflation hole (not shown in the figure), and the inflation hole is connected to the air supply pipe (not shown in the figure). The length of the airbag when not inflated is 5-10 mm, and it is attached to the outer wall of the tube body 11. When the airbag is inflated, it expands to form an elliptical or circular shape on the outside of the tube body 11, so that the outer wall of the airbag squeezes the human body's lumen, thereby fixing the tube body 11. Furthermore, the air supply pipe is arranged on the outside or inside of the tube body 11.

[0046] Figure 2 Schematic diagram of the structure of the inner core in some embodiments of the present invention. Figure 2The inner core 12 includes a core body 121 and at least one set of elastic structures 122. The core body 121 is made of a flexible material; the elastic structures 122 are slidably connected to the core body 121, and a set of the elastic structures 122 is an even number, and is used to apply two forces of the same magnitude and opposite directions to the core body 121.

[0047] Reference Figure 2 A handle 123 is provided on one side of the core 121 for the user to hold. Further, a cavity 1231 is provided in the handle 123, and the cavity 1231 is arranged one-to-one with the elastic structure 122. A sliding knob 1232 is provided in the cavity 1231, and one end of the knob 1232 extends to the outside of one end of the cavity 1231 and is connected to the elastic structure 122, and the other side of the knob 1232 extends to the outside of the other side of the cavity.

[0048] In some embodiments of the present invention, a lumen adapted to the elastic structure is provided in the core body, and the elastic structure is disposed in the lumen and is slidably connected to the lumen.

[0049] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along s-s' in some embodiments. Figure 3 , the inner core includes a group of elastic structures, one group of elastic structures includes a first elastic structure 1221 and a second elastic structure 1222, and a first tube cavity 1211 and a second tube cavity 1212 are provided in the core. The first elastic structure 1221 is slidably disposed in the first tube cavity 1211, and the bending force of the first elastic structure 1221 is oriented in the direction a, that is, horizontally to the left; the second elastic structure 1222 is slidably disposed in the second tube cavity 1212, and the bending force of the second elastic structure 1222 is oriented in the direction b, that is, horizontally to the right. More specifically, the bending forces of the first elastic structure 1221 and the second elastic structure 1222 are on the same horizontal plane.

[0050] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure along s-s' in some other embodiments. Figure 4The inner core includes two groups of elastic structures, one group of elastic structures includes a first elastic structure 1221 and a second elastic structure 1222, and the other group of elastic structures includes a third elastic structure 1223 and a fourth elastic structure 1224. A first tubular cavity 1211, a second tubular cavity 1212, a third tubular cavity 1213 and a fourth tubular cavity 1214 are provided in the core. The first elastic structure 1221 is slidably disposed in the first tube cavity 1211, and the bending force of the first elastic structure 1221 is oriented in the direction a, i.e., horizontally to the left; the second elastic structure 1222 is slidably disposed in the second tube cavity 1212, and the bending force of the second elastic structure 1222 is oriented in the direction b, i.e., horizontally to the right; the third elastic structure 1223 is slidably disposed in the third tube cavity 1213, and the bending force of the third elastic structure 1223 is oriented in the direction c, i.e., vertically upward; the fourth elastic structure 1224 is slidably disposed in the fourth tube cavity 1214, and the bending force of the fourth elastic structure 1224 is oriented in the direction d, i.e., vertically downward. More specifically, the bending forces of the first elastic structure 1221 and the second elastic structure 1222 are on the same horizontal plane, and the bending forces of the third elastic structure 1223 and the fourth elastic structure 1224 are on the same vertical plane.

[0051] In some embodiments of the present 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 larger than the maximum width of the cross section of the elastic structure perpendicular to the length direction, so that the driving structure will 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 to prevent the elastic structure from rotating and causing the direction of the force to change. Furthermore, the size and shape of the cross section of the elastic structure perpendicular to the length direction are the same.

[0052] In some preferred embodiments of the present invention, the material of the elastic structure is memory metal to prevent the elastic structure from losing its elasticity.

[0053] Some embodiments of the present invention also provide a method for using a biopsy device, the method for using the biopsy device comprising the following steps:

[0054] S1: inserting the sheath into a lumen of a human body;

[0055] S2: When the sheath reaches a position where bending is required, a portion of the elastic structure is extracted to cause the inner core to bend due to uneven force, thereby driving the tube body to bend and pass through the bending position;

[0056] S3: Repeat step S2 until the sheath reaches the target position, then extract the inner core and insert it into the sampling instrument.

[0057] In some specific embodiments, the method for using the biopsy device includes:

[0058] like Figure 5 As shown, the sheath tube 10 is inserted into the trachea 13, and the lower side of the trachea 13 is connected to the left bronchus 14 and the right bronchus 15;

[0059] like Figure 6 As shown, when the lesion is located in the right bronchus 15, the first elastic structure 1221 is removed, and the inner core 12 is bent to the right under the action of the second elastic structure 1222, so that the inner core 12 drives the tube body 11 to bend to the right;

[0060] like Figure 7 As shown, after the sheath tube 10 is bent, the sheath tube 10 continues to be inserted, and the sheath tube 10 is inserted into the right bronchus 15 with little resistance;

[0061] like Figure 8 As shown, after the sheath tube 10 reaches the lesion, the second elastic structure 1222 is taken out 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, so as to facilitate the removal of the inner core 12;

[0062] like Fig. 9 As shown, the inner core 12 is taken out, so that the tube body 11 is retained in the right bronchus 15;

[0063] like Fig.10 As shown, the sampling instrument 16 is extended along the tube body 11 into the lesion site of the right bronchus 15 for sampling.

[0064] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as described in the claims. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims

1. An inner core, applied to a sheath tube, characterized in that: include: Core, flexible material; as well as, At least one group of elastic structures, wherein the elastic structures are slidably connected to the core body, and the number of the elastic structures in a group is an even number, and the elastic structures are used to apply two forces of the same magnitude and in opposite directions to the core body; The core body is provided with a lumen adapted to the elastic structure, the elastic structure is arranged in the lumen and is slidably connected to the lumen; A handle is provided on one side of the core body for the user to hold; During use, when the core reaches a position where bending is required, part of the elastic structure is extracted to cause the core to bend due to uneven force, thereby driving the sheath tube to bend, so that the sheath tube passes through the bent position.

2. The inner core according to claim 1, characterized in that: A cavity is provided in the handle, a sliding knob is provided in the cavity, one end of the knob extends to the outside of one end of the cavity and is connected to the elastic structure, and the other side of the knob extends to the outside of the other side of the cavity.

3. The inner core according to any one of claims 1 to 2, characterized in that: The cross section of the elastic structure perpendicular to the extension direction is not circular.

4. The inner core according to any one of claims 1 to 3, characterized in that: The material of the elastic structure is memory metal.

5. A sheath tube, characterized in that: include: a tube body in a hollow tube shape; and The inner core as described in any one of claims 1 to 4 is arranged in the tube body.

6. The sheath tube according to claim 5, characterized in that: The outer diameter of the tube body is 1.6-1.65 mm.

7. The sheath tube according to claim 5, characterized in that: The inner diameter of the tube is 1-1.2 mm.

8. The sheath tube according to claim 5, characterized in that: One end of the tube body is provided with a sheath tube connection port.

9. The sheath tube according to claim 5, characterized in that: It also includes a locking structure, which is arranged on the outside of the tube body and is used to lock the position of the tube body in the human body lumen.

10. The sheath tube according to claim 9, characterized in that: 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.

11. A biopsy device, characterized in that: include: The sheath tube according to any one of claims 5 to 10; as well as, The sampling instrument is used for sampling a target position of a human body lumen through the sheath.

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