Calculus removing mesh basket

Abstract

The invention discloses a calculus removing net basket which comprises a sheath tube, the guide wire is arranged in the sheathing canal in a penetrating mode, one end of the guide wire is connected with a mesh basket body, and the guide wire can move in the axial direction of the sheathing canal and drive the mesh basket body to stretch out of the sheathing canal to be unfolded or retract into the sheathing canal; the blocking assembly comprises a connecting sleeve, a catheter and an air bag, the connecting sleeve is connected to the outer side of the end, away from the mesh basket body, of the sheathing canal, one end of the catheter is connected to the connecting sleeve, and the other end of the catheter extends to the end, close to the mesh basket body, of the sheathing canal in the axial direction of the sheathing canal; according to the calculus removing net basket, the air bag is used for conducting expansion blocking behind calculus, the calculus is effectively prevented from moving inwards, the calculus removing efficiency and convenience of the calculus removing net basket on calculus cleaning are greatly improved, and the calculus removing net basket is particularly suitable for calculus with the large size.

Description

Technical Field

[0001] The invention relates to a medical device, in particular to a stone removal net basket. Background Art

[0002] The stone removal basket is a medical device that is mainly used to grab, manipulate and remove stones and other foreign bodies from the urinary tract under endoscopy. In actual operation, when using the stone removal basket to grab stones, if the stone is too large, it is necessary to first withdraw the stone removal basket, crush the stone, and then reinsert the stone removal basket for multiple stone grabbing operations. During this process, the broken stones are easy to shift, for example, enter the kidney, which is not conducive to the cleaning of the stones. Therefore, there is an urgent need for a stone removal basket that can better remove and clean stones. Summary of the invention

[0003] The purpose of the present invention is to provide a stone-removing net basket to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The solution of the present invention to solve its technical problem is:

[0005] A stone removal basket comprises: a sheath tube; a guide wire, which is inserted into the sheath tube, one end of which is connected to a basket body, and the guide wire can move axially along the sheath tube and drive the basket body to extend out of the sheath tube to be expanded or retracted into the sheath tube; a blocking component, comprising a connecting sleeve, a catheter and an airbag, the connecting sleeve being connected to the outer side of the end of the sheath tube away from the basket body, one end of the catheter being connected to the connecting sleeve, and the other end of the catheter extending axially along the sheath tube to an end of the sheath tube close to the basket body, and the airbag being connected to an end of the catheter away from the connecting sleeve.

[0006] This technical solution has at least the following beneficial effects: when working, the sheath is placed into the body together with the catheter, and the guide wire is moved along the axial direction of the sheath to drive the basket body to extend from the end of the sheath. At this time, the basket body is opened, and the stone can enter the basket body, and then the basket body is driven by the guide wire to be retracted into the sheath. When the basket body is narrowed, the stone is clamped, thereby grabbing the stone. When the stone is too large and cannot be moved out at a single time, the connecting sleeve is moved in the direction close to the basket body, and the catheter is driven to move along the axial direction of the sheath through the connecting sleeve, and the catheter drives the airbag Move to the back of the stone, inflate the balloon through the catheter, so that the balloon expands and covers the position behind the stone. At this time, the stone is crushed, and then the basket body is used to clamp the stone, and the sheath is moved outward relative to the connecting sleeve to remove the stone. This process is repeated until all the broken stones are cleaned up, and finally the balloon is deflated and reset through the catheter. In this process, the balloon is used to expand and block the back of the stone, which effectively prevents the stone from shifting inward, greatly improving the efficiency and convenience of stone cleaning with the stone removal basket, especially for larger stones.

[0007] As a further improvement of the above technical solution, the two sides of the connecting sleeve are respectively connected with the catheters, and the ends of the two catheters are respectively connected to the two sides of the airbag. At this time, the two sides of the airbag are stably moved by the two catheters. When the airbag needs to be moved, the connecting sleeve is moved along the axial direction of the sheath. At this time, the power is transmitted to the two sides of the airbag through the catheters on both sides, thereby driving the airbag to pass over the stone and move to the back of the stone. In this way, the accuracy and convenience of controlling the movement of the airbag can be improved, and the position of the airbag when inflated can be better controlled and positioned.

[0008] As a further improvement of the above technical solution, avoidance grooves are respectively provided on both sides of the sheath tube, and the two catheters are respectively located in the two avoidance grooves. The two catheters are respectively placed in the two avoidance grooves, so that the structure of the sheath tube and the two catheters after being assembled as a whole is more compact and convenient to be placed in the body. When the connecting sleeve is moved to drive the two catheters to move, the two catheters can use the limit of the avoidance groove to better move along the axial direction of the sheath tube, which is conducive to improving the convenience of controlling the airbag activity.

[0009] As a further improvement of the above technical solution, the sheath is connected to a limit bar at the notch position of the avoidance groove close to the basket body, and the limit bar limits the catheter from slipping out of the avoidance groove. The limit bar is used to block the catheter at the notch position of the avoidance groove, which is conducive to preventing the catheter from directly slipping out of the avoidance groove at the end of the sheath when the airbag is driven by the catheter, thereby ensuring the accuracy of the directional control activity of the airbag.

[0010] As a further improvement of the above technical solution, the connecting sleeve is provided with air connection heads at the positions outside the two conduits. When the airbag needs to be inflated, the air source can be connected to the air connection heads on both sides of the connecting sleeve respectively, and the airbag can be inflated from both sides through the two conduits respectively; when the airbag needs to be deflated, the two conduits can be deflated from the air connection heads on both sides of the connecting sleeve, which can speed up the inflation speed of the airbag, thereby improving the inflation and deflation efficiency of the airbag.

[0011] As a further improvement of the above technical solution, the shape of the airbag is annular, the hardness of the outer side of the airbag is greater than the hardness of the inner side of the airbag, and when the airbag is inflated, the outer side of the airbag expands and forms a positioning portion, and the inner side of the airbag expands and forms a shielding portion. When the airbag is inflated, since the hardness of the outer side of the airbag is greater than the hardness of the inner side of the airbag, the expansion amount of the outer side of the airbag is lower than the expansion amount of the inner side of the airbag. At this time, the outer side of the airbag expands to form a positioning portion, which is used to tighten the inner wall fixed in the spatial position, and the inner side of the airbag expands toward the center position to form a shielding portion to block the gravel. In this way, the airbag can have a larger space inside the ring in a natural state, and can better pass over the stones to move to the rear, and when inflated, the airbag expands toward the center position to block the gravel.

[0012] As a further improvement of the above technical solution, the shielding part is arched from the periphery to the center in the direction close to the end of the sheath tube, and the basket body is a three-wire basket. When the annular inner side of the airbag expands, the annular inner side of the airbag expands in the direction close to the end of the sheath tube to form a conical structure. When the three-wire basket grabs gravel, it can be gathered from the periphery to the center position, so that the gravel is gathered to the arched shielding part, and then the gravel is grabbed. In this way, the shielding part expanded by the airbag forms a shape that is compatible with the three-wire basket, thereby improving the efficiency of grabbing gravel.

[0013] As a further improvement of the above technical solution, the shielding part is arched from the periphery to the center in the direction away from the end of the sheath tube, and the shape of the basket body is diamond-shaped or spiral-shaped. When the annular inner side of the airbag expands, the annular inner side of the airbag forms a conical structure that expands and bulges in the direction away from the end of the sheath tube, that is, the shielding part forms a bucket-shaped structure at the position opposite to the basket body. At this time, when the diamond-shaped or spiral-shaped basket body approaches the shielding part, the gravel can be pushed into the bucket-shaped structure, so that the gravel is better gathered in the bucket-shaped structure, and then the basket body is tightened and the gravel is grabbed, thereby improving the efficiency of grabbing the gravel.

[0014] As a further improvement of the above technical solution, a barb is provided inside the basket wire of the basket body. When the basket body is tightened to grab the gravel, the barb is used to get stuck in the gravel, which can improve the stability of stone grabbing, effectively prevent the stone from falling out of the basket body when the basket body grabs and removes the stone, and improve the operation stability.

[0015] As a further improvement of the above technical solution, a protrusion is provided on the outer side of the sheath tube away from the basket body, and a groove is provided on the inner side of the connecting sleeve, and the protrusion can be matched and connected in the groove. When the sheath tube and the connecting sleeve move together, the groove on the inner side of the connecting sleeve and the protrusion on the outer side of the sheath tube cooperate with each other, so that the connecting sleeve is relatively fixed on the sheath tube, which improves the convenience of moving the two together. When the connecting sleeve needs to move relative to the sheath tube, the groove on the inner side of the connecting sleeve and the protrusion on the outer side of the sheath tube can be disengaged from each other, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for use in the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0017] Figure 1 Schematic diagram of the structure of the first embodiment of the present invention

[0018] Figure 2 yes Figure 1 Schematic diagram of the AA cross-section structure.

[0019] Figure 3 It is a structural schematic diagram of embodiment 2 of the present invention.

[0020] In the attached drawings: 100 - sheath, 110 - avoidance groove, 120 - limit strip, 200 - guide wire, 210 - basket body, 310 - connecting sleeve, 320 - catheter, 330 - airbag. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] Reference Figure 1 A stone removal basket comprises a sheath tube 100, a guide wire 200 and a blocking component, wherein the guide wire 200 is inserted into the sheath tube 100, one end of the guide wire 200 is connected to a basket body 210, and the guide wire 200 can move along the axial direction of the sheath tube 100. When the guide wire 200 moves along the axial direction of the sheath tube 100, it can drive the basket body 210 to extend out of the sheath tube 100 and expand itself, so that the gravel can be collected into the basket body 210. When the guide wire 200 moves along the other end of the sheath tube 100, it can drive the basket body 210 to be collected into the sheath tube 100. 00, and folds and tightens itself, so that the gravel can be clamped and grabbed by the basket body 210; the blocking component includes a connecting sleeve 310, a catheter 320 and an airbag 330, the connecting sleeve 310 is connected to the outer side of the end of the sheath tube 100 away from the basket body 210, one end of the catheter 320 is connected to the connecting sleeve 310, and the other end of the catheter 320 extends axially along the sheath tube 100 to the end of the sheath tube 100 close to the basket body 210, and the airbag 330 is connected to the end of the catheter 320 away from the connecting sleeve 310.

[0026] As can be seen from the above, when working, the sheath tube 100 is placed into the body together with the catheter 320, and the guide wire 200 is moved axially along the sheath tube 100 to drive the basket body 210 to extend from the end of the sheath tube 100. At this time, the basket body 210 is opened, and the stone can enter the basket body 210, and then the basket body 210 is driven by the guide wire 200 to be retracted into the sheath tube 100. When the basket body 210 is narrowed, the stone is clamped, so as to capture the stone. When the stone is too large and cannot be moved out at a single time, the connecting sleeve 310 is moved in a direction close to the basket body 210, and the catheter 320 is driven to move axially along the sheath tube 100 by the connecting sleeve 310, so that the catheter 320 can be moved axially along the sheath tube 100, and the catheter 320 can be moved axially along the sheath tube 100. 20 drives the airbag 330 to move to the rear of the stone, and inflates the airbag 330 through the catheter 320, so that the airbag 330 expands and covers the position behind the stone. At this time, the stone is crushed again, and then the basket body 210 is used to clamp the stone, and the sheath 100 is moved outward relative to the connecting sleeve 310 to remove the stone. The process is repeated until all the crushed stones are cleaned up, and finally the airbag 330 is deflated and reset through the catheter 320. In this process, since the airbag 330 is used to expand and block the rear of the stone, the stone is effectively prevented from shifting inward, which greatly improves the efficiency and convenience of the stone removal basket for stone cleaning, especially for larger stones.

[0027] In the above embodiment, the number of the catheter 320 can be only one, and the connecting sleeve 310 drives the catheter 320 to move on one side of the sheath tube 100, thereby driving the airbag 330 to move from one side of the stone and pass over to the rear thereof. In order to improve the convenience of controlling the movement of the airbag 330, in this embodiment, the two sides of the connecting sleeve 310 are respectively connected with the catheters 320, and the ends of the two catheters 320 are respectively connected to the two sides of the airbag 330. At this time, the two sides of the airbag 330 are stably moved by the two catheters 320. When the airbag 330 needs to be moved, the connecting sleeve 310 is moved axially along the sheath tube 100. At this time, the power is transmitted to the two sides of the airbag 330 through the catheters 320 on both sides, thereby driving the airbag 330 to pass over the stone and move to the rear of the stone. In this way, the accuracy and convenience of controlling the movement of the airbag 330 can be improved, and the position of the airbag 330 when inflated can be better controlled and positioned.

[0028] The catheter 320 can be directly placed outside the sheath tube 100. In this case, the whole formed by the catheter 320 and the sheath tube 100 is relatively loose. In order to improve the compactness of the overall structure, Figure 2As shown, in the present embodiment, avoidance grooves 110 are respectively provided on both sides of the sheath 100, and the two catheters 320 are respectively located in the two avoidance grooves 110. In practical applications, the shape of the avoidance groove 110 is adapted to the shape of the catheter 320. For example, the shape of the avoidance groove 110 is a semicircular arc. At this time, the catheter 320 can freely cooperate with or disengage from the sheath 100 when moving relative to the sheath 100. Alternatively, the shape of the avoidance groove 110 is a major arc. At this time, when the catheter 320 enters the avoidance groove 110, it needs to be squeezed inward from the notch of the avoidance groove 110 to enter the avoidance groove 110. After entering the avoidance groove 110, it is difficult to directly escape outward, thereby improving the stability of fixing the two relatively. The two catheters 320 are respectively placed in the two avoidance grooves 110. After the sheath tube 100 and the two catheters 320 are assembled as a whole, the structure is more compact and convenient to be placed in the body. When the connecting sleeve 310 is moved to drive the two catheters 320 to move, the two catheters 320 can utilize the limiting function of the avoidance grooves 110 to better move along the axial direction of the sheath tube 100, which is beneficial to improving the convenience of controlling the movement of the airbag 330.

[0029] Furthermore, the sheath tube 100 is connected to a limiting strip 120 at a notch position of the avoidance groove 110 close to the basket body 210, and the limiting strip 120 limits the catheter 320 from escaping from the avoidance groove 110. The limiting strip 120 is used to block the catheter 320 at the notch position of the avoidance groove 110, which is conducive to preventing the catheter 320 from directly escaping from the avoidance groove 110 at the end position of the sheath tube 100 when the airbag 330 is driven to move by the catheter 320, thereby ensuring the accuracy of the directional control activity of the airbag 330.

[0030] When the airbag 330 needs to be inflated or deflated, the airbag 330 can be inflated or deflated from any one of the conduits 320. In order to improve the efficiency of inflating or deflation of the airbag 330, the two conduits 320 can be used to perform the inflating or deflation simultaneously. Specifically, the connecting sleeve 310 is provided with air connectors at positions outside the two conduits 320. When the airbag 330 needs to be inflated, the air sources can be connected to the air connectors on both sides of the connecting sleeve 310, and the airbag 330 can be inflated from both sides through the two conduits 320; when the airbag 330 needs to be deflated, the two conduits 320 can be deflated from the air connectors on both sides of the connecting sleeve 310, which can speed up the inflation speed of the airbag 330, thereby improving the inflation and deflation efficiency of the airbag 330.

[0031] The airbag 330 can be a strip-shaped structure in its natural state, and when inflated, it expands to form a flat structure to play a shielding role. In the present embodiment, the airbag 330 is in the shape of a ring, and the hardness of the outer side of the ring of the airbag 330 is greater than the hardness of the inner side of the ring of the airbag 330. When the airbag 330 is inflated, the outer side of the ring of the airbag 330 expands and forms a positioning portion, and the inner side of the ring of the airbag 330 expands and forms a shielding portion. When the airbag 330 is inflated, since the hardness of the annular outer side of the airbag 330 is greater than the hardness of the annular inner side of the airbag 330, the expansion amount of the annular outer side of the airbag 330 is lower than the expansion amount of the annular inner side of the airbag 330. At this time, the annular outer side of the airbag 330 expands to form a positioning portion, which is used to tighten and fix the inner wall at the spatial position, and the annular inner side of the airbag 330 expands toward the center position to form a shielding portion to block the gravel. In this way, the space inside the annular side of the airbag 330 is larger in the natural state, which can better pass over the stones and move to the rear. When inflated, the airbag 330 expands toward the center position to block the gravel.

[0032] In order to utilize the airbag 330 to cooperate with the basket body 210 to improve the efficiency of grabbing gravel, Figure 1 As shown, in the first embodiment, the shielding portion is arched from the periphery to the center in the direction close to the end of the sheath tube 100, and the basket body 210 is a three-wire basket. When the annular inner side of the airbag 330 expands, the annular inner side of the airbag 330 expands in the direction close to the end of the sheath tube 100 to form a conical structure. When the three-wire basket grabs gravel, it can be gathered from the periphery to the center position, so that the gravel is gathered to the arched shielding portion, and then the gravel is grabbed. In this way, the shielding portion expanded by the airbag 330 forms a shape that is compatible with the three-wire basket, thereby improving the efficiency of grabbing gravel.

[0033] like Figure 3 As shown, in the second embodiment, the shielding part is arched from the periphery to the center in the direction away from the end of the sheath tube 100, and the shape of the basket body 210 is diamond-shaped or spiral-shaped. When the annular inner side of the airbag 330 expands, the annular inner side of the airbag 330 forms a conical structure that expands and bulges in the direction away from the end of the sheath tube 100, that is, the shielding part forms a bucket-shaped structure at the position opposite to the basket body 210. At this time, when the diamond-shaped or spiral-shaped basket body 210 approaches the shielding part, the gravel can be pushed into the bucket-shaped structure, so that the gravel is better gathered in the bucket-shaped structure, and then the basket body 210 tightens and grabs the gravel, which improves the efficiency of grabbing the gravel.

[0034] The basket body 210 includes a plurality of basket wires arranged around the center of the sheath tube 100. When the sheath tube 100 is received, the plurality of basket wires will be elastically deformed to gather together. When the sheath tube 100 is released, the plurality of basket wires will be elastically restored to spread apart. In order to improve the clamping force of the plurality of basket wires for grabbing stones when they gather together, in this embodiment, barbs are provided on the inner side of the basket wires of the basket body 210. When the basket body 210 is tightened to grab the gravel, the barbs are used to get stuck in the gravel, which can improve the stability of grabbing the stone, effectively prevent the stone from falling out of the basket body 210 when the basket body 210 grabs and removes the stone, and improve the stability of operation.

[0035] In order to facilitate the fixing of the connecting sleeve 310 and the sheath tube 100, in this embodiment, a protrusion is provided on the outer side of the sheath tube 100 away from the basket body 210, and a groove is provided on the inner side of the connecting sleeve 310, and the protrusion can be matched and connected in the groove. When the sheath tube 100 and the connecting sleeve 310 move together, the groove on the inner side of the connecting sleeve 310 and the protrusion on the outer side of the sheath tube 100 cooperate with each other, so that the connecting sleeve 310 is relatively fixed on the sheath tube 100, and the convenience of moving the two together is improved. When the connecting sleeve 310 needs to move relative to the sheath tube 100, the groove on the inner side of the connecting sleeve 310 and the protrusion on the outer side of the sheath tube 100 are disengaged from each other, which is convenient to use.

[0036] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A stone-taking basket, characterized in that: include: Sheath (100); A guide wire (200) is inserted into the sheath tube (100), one end of the guide wire (200) is connected to a basket body (210), and the guide wire (200) can move along the axial direction of the sheath tube (100) and drive the basket body (210) to extend out of the sheath tube (100) and expand or retract into the sheath tube (100); The blocking component comprises a connecting sleeve (310), a catheter (320) and an airbag (330), wherein the connecting sleeve (310) is connected to the outer side of the end of the sheath tube (100) away from the net basket body (210), one end of the catheter (320) is connected to the connecting sleeve (310), and the other end of the catheter (320) extends axially along the sheath tube (100) to the end of the sheath tube (100) close to the net basket body (210), and the airbag (330) is connected to the end of the catheter (320) away from the connecting sleeve (310).

2. A stone-removing basket according to claim 1, characterized in that: The two sides of the connecting sleeve (310) are respectively connected to the catheter (320), and the ends of the two catheters (320) are respectively connected to the two sides of the airbag (330).

3. A stone-removing basket according to claim 2, characterized in that: Avoidance grooves (110) are respectively provided on both sides of the sheath tube (100), and the two catheters (320) are respectively located in the two avoidance grooves (110).

4. A stone-removing basket according to claim 3, characterized in that: The sheath tube (100) is connected to a limiting strip (120) at a notch position of the avoidance groove (110) close to the basket body (210), and the limiting strip (120) limits the catheter (320) from escaping from the avoidance groove (110).

5. The stone-removing basket according to claim 2, characterized in that: The connection sleeve (310) is provided with gas connection heads at positions outside the two conduits (320).

6. The stone-removing basket according to claim 2, characterized in that: The airbag (330) is in the shape of a ring, and the hardness of the outer ring side of the airbag (330) is greater than the hardness of the inner ring side of the airbag (330). When the airbag (330) is inflated, the outer ring side of the airbag (330) expands and forms a positioning portion, and the inner ring side of the airbag (330) expands and forms a shielding portion.

7. The stone-removing basket according to claim 6, characterized in that: The shielding portion is arched from the periphery toward the center in a direction close to the end of the sheath tube (100), and the basket body (210) is a three-wire basket.

8. The stone-removing basket according to claim 6, characterized in that: The shielding portion is arched from the periphery toward the center in a direction away from the end of the sheath tube (100), and the shape of the basket body (210) is diamond-shaped or spiral-shaped.

9. The stone-removing basket according to claim 1, characterized in that: The inner side of the basket wire of the basket body (210) is provided with a barb.

10. The stone-removing basket according to claim 1, characterized in that: The outer side of the sheath tube (100) away from the basket body (210) is provided with a protrusion, and the inner side of the connecting sleeve (310) is provided with a groove, and the protrusion can be matched and connected in the groove.

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