Basket body and stone removal basket

Abstract

In conventional three-pronged baskets, the surface that comes into contact with the stone is made of polymer or metal materials, and the polymer tube has a smooth surface and a low coefficient of friction, making it easy for stones to slip out. [Solution] The present invention provides a basket body and a stone removal basket. The basket body includes a plurality of metal sleeves arranged side by side, and a non-slip pattern is cut into the outer surface of the metal sleeve. Two adjacent metal sleeves are connected via a metal wire, and the metal wire slides through the inside of one of the metal sleeves, and the distal end of the metal wire extends from the opening of the distal end of the metal sleeve and is fixed inside the other adjacent metal sleeve from the opening of the distal end. In the deployed state, the plurality of metal sleeves and the metal wire are combined to form a conical basket. In the present invention, the sleeves of the basket body are made of a metal material, which enhances the surface friction and improves the trapping efficiency of the basket and the durability when repeatedly collecting stones. In addition, the non-slip pattern is cut into the surface of the metal sleeve, which meets the flexibility requirement of the head of the basket, improves the friction force and durability of the basket, and reduces the risk of stones slipping off from the side.

Description

[Technical field]

[0001] The present invention relates to the technical field of medical equipment, and in particular to a basket body and a stone removal basket. [Background technology]

[0002] During stone removal surgery, large stones at the site are broken down with a laser and then removed through an endoscopic stone removal basket. Summary of the Invention [Problem to be solved by the invention]

[0003] In conventional three-pronged baskets, the surface that comes into contact with stones is made of polymer or metal materials, and in normal use, the polymer outer surface is damaged by repeated friction with hard stones, and the polymer material is broken at the contact surface between the polymer and metal materials. The polymer tube has a smooth surface and a low friction coefficient, which makes it easy for stones to slip out. [Means for solving the problem]

[0004] In order to solve the above problems, the present invention provides The device includes a plurality of metal sleeves arranged side by side, the outer surface of the metal sleeves being cut with a non-slip pattern, two adjacent metal sleeves being connected via a metal wire, the metal wire passing slidably through the inside of one of the metal sleeves, the distal end of the metal wire extending from an opening at the distal end of the metal sleeve, and extending from the opening at the distal end of the other adjacent metal sleeve into the inside thereof and fixed thereto; In a deployed state, a plurality of the metal sleeves and the metal wires combine to form a cone-shaped basket to provide a basket body.

[0005] Preferably, the anti-slip pattern penetrates the tube wall of the metal sleeve.

[0006] Preferably, the outer surface of the metal sleeve is friction-machined.

[0007] Preferably, the friction processing method is sandblasting or laser marking.

[0008] Preferably, the anti-skid pattern is at least one of a sawtooth pattern, an elongated pattern, a helical pattern, and a screw thread pattern.

[0009] Preferably, the sawtooth pattern is defined by a plurality of spaced apart serrations cut axially into the outer surface of the metal sleeve.

[0010] Preferably, the elongated pattern is formed of a plurality of spaced apart elongated grooves cut axially into the outer surface of the metal sleeve.

[0011] Preferably, the helical pattern is formed by a helical groove cut longitudinally into the outer surface of the metal sleeve between two adjacent elongated grooves.

[0012] Preferably, the thread pattern is formed by helical threads cut longitudinally on the outer surface of the metal sleeve.

[0013] Preferably, the threads of the thread pattern have different inclinations.

[0014] Preferably, the metal wire has a braided structure or a spring structure at a portion extending from the metal sleeve, or the braided structure or the spring structure is fixed to the outer surface of the portion extending from the metal sleeve.

[0015] Preferably, a polymer or metal catheter is further fixedly mounted within each of the metal sleeves, and the metal wire passes slidably through the polymer or metal catheter.

[0016] Preferably, the metal sleeve is made of a stainless steel material or a nickel titanium material, and the metal wire is a nickel titanium wire.

[0017] The present invention also provides a stone removal basket including the above basket body. Effect of the Invention

[0018] Compared with the prior art, the present invention has the following technical advantages:

[0019] The present invention provides a basket body and a stone removal basket, in which the sleeve of the basket body is made of metal material to enhance the surface friction, improve the trapping efficiency of the basket and the durability when repeatedly collecting stones, and the surface of the metal sleeve is cut with a non-slip pattern to meet the flexibility requirement of the head of the basket, improve the friction and durability of the basket, and reduce the risk of stones slipping off from the side. [Brief description of the drawings]

[0020] In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces drawings necessary for describing the embodiments or the prior art. However, the drawings described below are only some embodiments of the present invention, and it is obvious that those skilled in the art can obtain other drawings based on these drawings without any creative efforts. [Figure 1] FIG. 2 is a structural schematic diagram of a basket body in a retracted state according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a structural schematic diagram of a basket body in an unfolded state according to an embodiment of the present invention. [Diagram 3] 2 is a partially enlarged view of a basket body according to an embodiment of the present invention in an unfolded state. FIG. [Figure 4] 2 is a partially enlarged view of a basket body according to an embodiment of the present invention in an unfolded state. FIG. [Diagram 5]FIG. 2 is a structural schematic diagram of a metal sleeve having a sawtooth pattern cut into its outer surface according to an embodiment of the present invention; [Figure 6] 2 is a structural schematic diagram of a metal sleeve according to an embodiment of the present invention when a long pattern is cut into the outer surface of the metal sleeve; FIG. [Figure 7] 2 is a structural schematic diagram of a metal sleeve according to an embodiment of the present invention when a long pattern and a spiral pattern are cut into the outer surface of the metal sleeve. FIG. [Figure 8] FIG. 2 is a structural schematic diagram of a metal sleeve having a thread pattern cut into its outer surface according to one embodiment of the present invention; [Figure 9] FIG. 2 is a structural schematic diagram of a metal sleeve having a thread pattern cut into its outer surface according to one embodiment of the present invention; [Figure 10] According to one embodiment of the present invention, a braided structure or a spring structure is fixed to an outer surface of a portion of the metal wire extending from the metal sleeve. [Figure 11] According to one embodiment of the present invention, a braided structure or a spring structure is fixed to an outer surface of a portion of the metal wire extending from the metal sleeve. [Figure 12] According to one embodiment of the present invention, a braided structure or a spring structure is fixed to an outer surface of a portion of the metal wire extending from the metal sleeve. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The technical solutions in the embodiments of the present invention will be described below clearly and completely with reference to the accompanying drawings, but it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not the whole. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without performing creative labor, fall within the protection scope of the present invention.

[0022] The technical solutions of the present invention are described in detail below using specific embodiments. Some of the following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in some embodiments anymore. Example 1

[0023] As shown in Figs. 1 to 9, the basket body 1 includes a plurality of metal sleeves 11 arranged in parallel, and the metal sleeves 11 have a tubular structure with both ends open. In the present invention, the metal material for manufacturing the metal sleeves 11 is not limited, and for example, the metal sleeves 11 are manufactured from highly elastic materials such as stainless steel or nickel titanium. This is to firmly capture foreign bodies such as stones during medical procedures and make the foreign bodies less likely to fall off. In addition, an anti-slip pattern 111 is cut into the outer surface of the metal sleeve 11, which is to improve the friction coefficient of the metal sleeve 11, prevent the foreign bodies from falling off when they are captured, make it easier for the metal sleeve 11 to capture the foreign bodies, and shorten the time required for surgery.

[0024] The two adjacent metal sleeves 11 are connected via a metal wire 12. A polymer catheter (a polymer catheter is made of a polymer material) or a metal catheter 13 is fixed inside each of the metal sleeves 11, and each metal wire 12 passes slidably through the corresponding polymer catheter or metal catheter 13, i.e., the metal wire 12 is slidable relative to the polymer catheter or metal catheter 13 in which it exists, and the polymer catheter or metal catheter 13 ensures that the metal wire can freely slide inside. The distal end of each metal wire 12 extends from an opening at the distal end (the distal end refers to the end that is separated from the operator during surgery) of the corresponding metal sleeve 11, and extends from an opening at the distal end of another adjacent metal sleeve 11 and is fixed therein, i.e., one end of the metal wire 12 is a fixed end, and this fixed end is fixedly connected to the corresponding metal sleeve 11, and this fixed end is fixed inside the corresponding metal sleeve 11 by adhesion, welding, or the like. The other end of the metal wire 12 is a free end that can slide inside the polymer catheter or metal catheter 13 in another adjacent metal sleeve 11. When the free end of the metal wire 12 extends forward along the polymer catheter or metal catheter 13, the basket body 1 opens and the metal sleeve 11 deforms slightly, so that foreign objects such as stones are caught in the gap and are difficult to fall out. When the free end of the metal wire 12 is retracted backward along the polymer catheter or metal catheter 13, the basket body 1 is settled. Since the anti-slip pattern 111 is cut into the surface of the metal sleeve 11, the surface friction coefficient is large and foreign objects are difficult to fall out.

[0025] The metal sleeve 11 of this embodiment is made of metal because metal is more durable than polymer, polymer tube has poor fatigue resistance, and repeated opening and closing of the basket causes continuous friction caused by foreign objects, which leads to damage of the polymer tube, and the metal sleeve 11 can solve these problems, i.e., the friction coefficient of the surface of the metal sleeve 11 is increased, improving the trapping efficiency of the basket and durability against repeated stone removal. In addition, the anti-slip pattern 111 is cut into the surface of the metal sleeve 11, which meets the flexibility requirement of the head of the basket, improves the friction and durability of the basket, and reduces the risk of stones and other foreign objects slipping off from the sides.

[0026] When the basket body is opened, the metal sleeve 11 elastically bends outward. Therefore, since the anti-slip pattern 111 is cut into the metal sleeve 11, the metal sleeve 11 elastically deforms when subjected to an external force, i.e., the elasticity of the metal sleeve 11 is improved, while the frictional force of the outer surface of the metal sleeve 11 is increased, i.e., the friction coefficient of the outer surface of the metal sleeve 11 is increased.

[0027] As shown in FIG. 2, in the deployed state, each metal wire 12 extends forward from the polymeric or metallic catheter 13 in which it resides, and the metal sleeves 11 spread outward, with the multiple metal sleeves 11 and metal wires 12 combining to form a conical basket.

[0028] In the present invention, the number of metal sleeves 11 and metal wires 12 is not limited, and the number of metal sleeves 11 and metal wires 12 is the same, and for example, the number of metal sleeves 11 and metal wires 12 may be three or more, and in this embodiment, it is preferable that the number of metal sleeves 11 and metal wires 12 is three.

[0029] In the present invention, the shape of the anti-slip pattern 111 on the outer surface of the metal sleeve 11 is not particularly limited, and as long as it can perform the function of anti-slip, it is within the scope of protection of the present invention. In the present invention, the anti-slip pattern 111 is formed by cutting, and may be a hollow pattern (i.e., the anti-slip pattern 111 passes through the tube wall of the metal sleeve 11) or may not be a hollow pattern (i.e., the anti-slip pattern 111 does not pass through the tube wall of the metal sleeve 11), and the present invention is not particularly limited thereto. Hereinafter, the anti-slip pattern 111 of some specific shapes will be described in detail as examples.

[0030] As shown in FIG. 5, in a first embodiment, the anti-slip pattern 111 includes a sawtooth pattern.

[0031] The sawtooth pattern is formed by a plurality of spaced sawtooth grooves 1111 cut in the axial direction on the outer surface of the metal sleeve 11, i.e., a plurality of sawtooth grooves 1111 are cut in the axial direction on the outer surface of the metal sleeve 11, and in this embodiment, the groove width of the sawtooth grooves 1111 is not particularly limited and can be set according to the size of the stone. If the stone is large, the groove width of the sawtooth grooves 1111 is large, and if the stone is small, the groove width of the sawtooth grooves 1111 is small. The sawtooth pattern according to this embodiment is more suitable for large stones, and when a stone is captured through the sawtooth grooves, the metal sleeve 11 is pressed vertically and is less likely to be deformed again.

[0032] 6, in a second embodiment, the anti-slip pattern 111 includes an elongated pattern, which is formed of a plurality of elongated grooves 1112 spaced apart and cut along the axial direction on the outer surface of the metal sleeve 11, i.e., a plurality of elongated grooves 1112 are cut along the axial direction on the outer surface of the metal sleeve 11, which is more suitable for capturing small stones, and preferably, the groove width of the elongated grooves 1112 is less than the diameter of the metal wire 12.

[0033] As shown in FIG. 7, in the third embodiment, the anti-slip pattern 111 includes an elongated pattern and a spiral pattern, and the elongated pattern is formed of a plurality of spaced apart elongated grooves 1112' cut along the axial direction on the outer surface of the metal sleeve 11, i.e., a plurality of elongated grooves 1112' are cut along the axial direction on the outer surface of the metal sleeve 11. The spiral pattern is formed of a spiral groove 1113 cut along the longitudinal direction on the outer surface of the metal sleeve 11 between two adjacent elongated grooves 1112', i.e., a spiral groove 1113 is cut along the longitudinal direction on the outer surface of the metal sleeve 11 between two adjacent elongated grooves 1112' on the outer surface of the metal sleeve 11. The anti-slip pattern 111 can capture both large and small stones.

[0034] As shown in FIG. 8, in the fourth embodiment, the non-slip pattern 111 includes a thread pattern, and the thread pattern is formed by a thread 1114 that is cut in a spiral shape along the longitudinal direction on the outer surface of the metal sleeve 11, that is, the thread 1114 is cut in a spiral shape along the longitudinal direction on the outer surface of the metal sleeve 11, and the smaller the pitch of the thread 1114, the softer the metal sleeve 11 is, and the easier the basket is to deform. The thread pattern is suitable for capturing small stones. In this embodiment, the thread inclination of the non-slip pattern 111 may be the same or different. When the thread inclination of the non-slip pattern 111 is different, the flexibility of the entire metal sleeve 11 can be adjusted by adjusting the thread inclination, and a basket product that can be applied to various scenes can be manufactured. For example, the metal sleeve 11 may be soft at the front and hard at the rear (i.e., the distal end has a smaller incline than the proximal end), or soft at the rear and hard at the front (i.e., the distal end has a larger incline than the proximal end).

[0035] In order to further increase the friction coefficient of the outer surface of the metal sleeve 11, the outer surface of the metal sleeve 11 is friction-treated, for example, by applying friction-improving means such as sandblasting or laser marking to the outer surface of the metal sleeve 11, the flexibility requirements of the basket head are met, the friction force and durability of the basket are improved, and the risk of stones slipping off from the sides is reduced.

[0036] In this embodiment, the metal wire 12 is a mature technology in this field, and the material is not limited, but nickel titanium wire is used for the metal wire 12 in this field. Of course, it can be made of other highly elastic metal materials, and the present invention is not particularly limited thereto.

[0037] In order to further improve the frictional force of the basket head and prevent stones from escaping from the top, the metal wire 12 may be frictionally processed on the entire or partial outer surface. As shown in Figs. 10 to 12, in order to save costs without impairing the strength of the entire metal wire 12, in this embodiment, it is preferable that the part of the metal wire 12 extending from the metal sleeve 11 has a braided structure or a spring structure, or that a braided structure or a spring structure 121 is fixed to the outer surface of the part extending from the metal sleeve 11. This improves the frictional force of the metal wire 12. The braided structure or the spring structure 121 may be the part extending from the metal sleeve 11 when the basket body 1 is in a retracted state, or may be the part extending from the metal sleeve 11 when the basket body 1 is in an expanded state. In order to avoid the braided structure or spring structure 121 becoming stuck in the polymer catheter or metal catheter 13 and being unable to extend when the basket body 1 is opened, and / or being unable to be contained in the polymer catheter or metal catheter 13 even when the basket body 1 is closed, in this embodiment, preferably, a braided structure or spring structure is provided in the portion extending from the metal sleeve 11 when the basket body 1 is in the retracted state. Example 2

[0038] As shown in FIG. 2 , this embodiment provides a stone removal basket that includes a basket body 1 described in the above embodiment and a sheath tube 2, and the proximal ends (proximal end refers to the end close to the operator during surgery) of multiple metal sleeves 11 of the basket body 1 communicate with the sheath tube 1 and are fixedly connected to the distal end of the sheath tube 1.

[0039] It should be noted that the above embodiments are only used to describe the technical solutions of the present invention, and are not intended to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it should be understood that those skilled in the art can still modify the technical solutions described in the above embodiments, or equally replace some or all of the technical features thereof. These modifications or replacements do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A basket body, The device includes a plurality of metal sleeves arranged side by side, the outer surface of the metal sleeves being cut with a non-slip pattern, two adjacent metal sleeves being connected via a metal wire, one of the metal sleeves being slidably passed through the inside of one of the metal sleeves, the distal end of the metal wire extending from an opening at the distal end of the metal sleeve, and extending from the opening at the distal end of the other adjacent metal sleeve into the inside of the other adjacent metal sleeve and being fixed thereto; In a deployed state, the plurality of metal sleeves and the metal wires are combined to form a cone-shaped basket.

2. The basket body according to claim 1 , wherein the anti-slip pattern penetrates the tube wall of the metal sleeve.

3. 2. The basket body according to claim 1, wherein the outer surface of the metal sleeve is friction-machined.

4. The basket body according to claim 3, characterized in that the friction processing method is sandblasting or laser marking.

5. 2. The basket body of claim 1, wherein the anti-slip pattern is at least one of a sawtooth pattern, an elongated pattern, a helical pattern, and a thread pattern.

6. 6. The basket body of claim 5, wherein the sawtooth pattern is defined by a plurality of spaced apart sawtooth grooves cut axially into the exterior surface of the metal sleeve.

7. 6. The basket body of claim 5, wherein the elongated pattern is defined by a plurality of spaced apart elongated grooves cut axially into the outer surface of the metal sleeve.

8. 8. The basket body according to claim 7, wherein the spiral pattern is formed by a spiral groove cut longitudinally on the outer surface of the metal sleeve between two adjacent elongated grooves.

9. 6. The basket body of claim 5, wherein the thread pattern is formed by a helical thread cut longitudinally on the outer surface of the metal sleeve.

10. 10. The basket body of claim 9, wherein a plurality of the threads in the thread pattern have different inclinations.

11. The basket body according to claim 1, characterized in that the metal wire has a braided structure or a spring structure at the portion extending from the metal sleeve, or a braided structure or a spring structure is fixed to the outer surface of the portion extending from the metal sleeve.

12. 2. The basket body according to claim 1, further comprising a polymer or metal catheter fixedly provided within each of the metal sleeves, the metal wire slidably passing through the polymer or metal catheter.

13. 2. The basket body according to claim 1, wherein the metal sleeve is made of stainless steel or nickel titanium material, and the metal wire is a nickel titanium wire.

14. A stone removal basket comprising the basket body according to any one of claims 1 to 13.

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