CN217219139U - Stone fetching support and stone fetching device - Google Patents

Abstract

The utility model discloses a get stone support and get stone device belongs to medical instrument technical field, should get the stone support and include: a body having an open state and a storage state; when the body is in an open state, the body comprises at least two flange parts, and the flange parts are stacked to form a layered stone taking structure; a guide tip connected to the distal end of the body. The flange part is formed in the opened state to be fully attached to the inner wall of the organ at the calculus part, so that when the calculus removing bracket moves in the lumen of the organ, the layered calculus removing structure can fully clean the lumen and smoothly take out calculus; in the process of drawing, negative pressure can be generated in the far-end pipe cavity to take out the small stones at the far end, so that the stone taking efficiency is improved, and the stone taking rate is effectively improved. The calculus removing device has wide applicability, can be applied to calculus removing operations of human and animals, can be used for removing calculus from bile duct, and can also be applied to calculus treatment of ureter or other parts.

Description

Stone fetching support and stone fetching device

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to get stone support and get stone device.

Background

Calculus is a common disease, such as bile duct calculus and ureteral calculus, which has great harm to human health and seriously affects life quality. After the occurrence of calculus, treatment should be timely adopted to get rid of the trouble of diseases.

At present, the main stone removing instruments adopted in the stone operation are divided into two types: one is that the balloon is inflated at the calculus part, and then the balloon is pulled out to take out the calculus, however, when the balloon is used for taking out the small calculus, the situation that the small calculus is embedded at an outlet exists, and the small calculus is not easy to take out after being embedded, so that the calculus cannot be taken out completely; the other is a basket which can be extended into the calculus area to wrap and bind the calculus so as to take out the calculus, but for smaller calculus, under the narrow space of the body duct, the calculus is difficult to be wrapped and bound accurately, so that the calculus cannot be taken out cleanly.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome the defects of the prior art, the utility model provides a calculus removing bracket to ensure the calculus removing rate; the purpose of the utility model is also to provide a calculus removing device with the calculus removing bracket for the calculus operation is completed by the high efficiency.

The technical scheme is as follows: in order to realize the above purpose of the utility model, the utility model provides a calculus removing bracket, include:

a body having an open state and a storage state; when the body is in the open state, the body comprises at least two flange parts, and the flange parts are arranged in a laminated mode to form a layered stone-taking structure;

a guide tip connected to the distal end of the body.

In some embodiments, the body is a flexible body, the switching between the open state and the stowed state being achieved by deformation.

In some embodiments, the body comprises a deformation;

in the open state, the deformation portion is expanded to form the flange member;

in the stowed state, the deformation stretches to form a tubular structure.

In some embodiments, the body further comprises a support part, and the support part and the deformation part are alternately arranged and connected;

when in the open state, the adjacent support parts are close to each other;

in the storage state, the adjacent support portions are away from each other.

In some embodiments, the body is integrally formed.

In some embodiments, the body is a mesh structure formed by weaving or engraving.

In some embodiments, the body is a mesh structure woven from filaments.

In some embodiments, the wire comprises a shape memory alloy wire.

In some embodiments, the body is a mesh structure carved out of a shape memory alloy.

In some embodiments, the stone extraction support further comprises:

a connecting portion connected to a proximal end of the body.

The utility model provides a pair of stone taking device, including above-mentioned arbitrary stone taking support, and:

an inner tube connected to the proximal end of the lithotomy stent;

the outer pipe is sleeved outside the inner pipe;

the handle assembly is used for driving the inner tube to slide relative to the outer tube, so that the body is inserted into the outer tube or extends out of the outer tube, and the storage state and the opening state are switched.

In some embodiments, the handle assembly comprises:

a first handle connected to the inner tube;

a second handle connected to the outer tube;

the second handle has an axial through hole through which the inner tube passes.

In some embodiments, the inner tube is connected with a connecting part of the calculus removing bracket, and the connecting part is a connecting tube.

Has the advantages that: compared with the prior art, the calculus removing bracket is provided with the flange part when in an open state, and can be fully attached to the inner wall of the organ cavity of the calculus part, so that calculus in a pipeline can be pulled out by moving the calculus removing bracket in the organ cavity in the operation process; and, through setting up two at least flange parts, range upon range of the formation stratiform of arranging gets the stone structure, can be on the one hand to the repeated clearance of organ lumen, avoid having settled the stone to omit, further improve the efficiency of getting the stone, on the other hand stratiform gets the stone structure and organ lumen inner wall laminating inseparabler, can form the negative pressure when removing in the lumen that is located the distal end of stone support, acts on the lithangiuria of distal end, makes it taken out by the situation, and then the effectual rate of getting out that improves the stone. The calculus removing device has wide applicability, is suitable for various calculus removing operations of human and animals, for example, can be applied to calculus removal of bile duct under Endoscopic Retrograde Cholangiopancreatography (ERCP), can reach duodenal papilla through endoscopic forceps channel, and enters the bile duct to remove calculus. In addition, the method can also be applied to treatment of calculus in ureter or other parts.

Drawings

The technical solution and other advantages of the present invention will become apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 is a schematic perspective view of a stone removal support according to some embodiments of the present invention;

FIG. 2 is a schematic perspective view of the lithotomy stent provided in FIG. 1, viewed from another angle;

FIG. 3 is a front view of the stone removal bracket provided in FIG. 1;

FIG. 4 is a right side view of the lithotomy support provided in FIG. 3;

FIG. 5 is a cross-sectional view of the stone holder of FIG. 4 taken along line A-A;

FIG. 6 is a schematic perspective view of a calculus removing device having the calculus removing bracket shown in FIG. 1;

FIG. 7 is a front view of the calculus removing device provided in FIG. 6;

FIG. 8 is a partial cross-sectional view of the stone removal device shown in FIG. 1, with the stone removal bracket in a stowed position;

fig. 9 is a schematic perspective view of a stone removing rack provided in another embodiment of the present invention;

FIG. 10 is a schematic perspective view of the lithotomy stent provided in FIG. 9, viewed from another angle;

FIG. 11 is a front view of the stone extraction bracket provided in FIG. 9;

FIG. 12 is a right side view of the lithotomy support provided in FIG. 11;

FIG. 13 is a cross-sectional view of the stone holder of FIG. 12 taken along line B-B;

FIG. 14 is a partial cross-sectional view of the stone removal device shown in FIG. 9 in a stowed position;

FIG. 15 is a schematic view of the construction of the stone removal holder when one flange member is provided;

reference numerals: 1-body; 10-a flange member; 11-a support; 12-wire material; 2-a guide tip; 3-a connecting part; 4-inner tube; 5-an outer tube; 6-a handle assembly; 61-a first handle; 62-a second handle.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

In the description of the present invention, it is to be understood that the term "proximal" refers to the end closer to the operator, and "distal" refers to the end further away from the operator; the term "axial direction" refers to the length extension direction of the stone taking support or the stone taking device, and the term "radial direction" refers to the direction perpendicular to the axial direction at any position of the stone taking support or the stone taking device; the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features.

Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The embodiment of the utility model provides a calculus removing bracket mainly is applied to the calculus removing operation of people or animals, as shown in fig. 1-14, this calculus removing bracket mainly includes body 1 and guide end 2 two parts.

Wherein, the body 1 is the most critical part of the stone taking bracket. In order to smoothly feed the endoscope channel into the target calculus removing position and smoothly remove various calculi, the body 1 needs to have a storage state and an open state, which are key factors for successfully carrying out calculus removing operation. When the body is in a storage state, the body 1 is stored in the outer tube 5 of the calculus removing device and only occupies a small space, so that the body is not blocked by other components or organs and does not rub the organs to stimulate and hurt the organs in the process of being fed into the body through an endoscopic forceps channel. After the body 1 is inserted into a target calculus removing position in an organ, the body is switched to an open state, and calculus in the organ can be smoothly removed through the specific shape of the body.

In order to achieve the object of increasing the stone exhaustion rate, in the embodiment of the present invention, the body 1 has at least two flange members 10 in the open state, and the flange members 10 are stacked in the axial direction to form a layered stone exhausting structure. As shown in fig. 1-5 and 9-13, in the opened state, the outer edge of the flange member 10 is substantially circular and has a size corresponding to the size of the organ (e.g., bile duct, ureter, etc.) at the site of the stone, so that the flange member 10 can sufficiently conform to the inner wall of the lumen of the organ, thereby reducing the omission of the stone during the stone removal process.

Generally, in order to reduce the stimulation and damage of the instrument to the internal organs to the greatest extent and to facilitate the switching between the storage state and the open state, the body 1 is made of a flexible material. The flexible body 1 enables a significant reduction in friction against organs and also enables switching between the open state and the stowed state by means of the deformable properties and shape recovery of the material itself.

In some embodiments, the body 1 includes a deformation portion, by which deformation of the deformation portion, switching of the body 1 between the storage state and the open state is achieved. In the open state, the deformed portions form the flange members 10, and therefore the number thereof is kept consistent with the number of the flange members 10. The storage state is a state in which the body 1 is drawn into the outer tube 5 of the lithotomy device, and therefore, in this state, the shape of the deformed portion should match the shape of the inner cavity of the outer tube 5 so that the deformed portion can be accommodated in the outer tube 5. In this case, the deformed portion is in a state of being axially stretched and deformed, and has a tubular structure having a substantially uniform diameter over the entire length, that is, the diameter of the tubular structure may be completely the same or slightly different at each position over the entire length, and the size may be set so as to be entirely accommodated in the outer tube 5 in this state. The open state is the state that the body 1 stretches out from the outer tube 5 of getting the stone device and is used for getting the stone, and at this moment, the deformation portion radially struts and forms flange part 10, and its external diameter maximum dimension after strutting is the size of flange part 10 outer fringe promptly, and this maximum dimension and the size phase-match of organ lumen guarantee its and lumen inner wall laminating, also should avoid producing wearing and tearing because of the size is too big to the inner wall, and specific size can set up according to the different demands of different operation positions.

The overall shape of the flange member 10 may be specified as desired, and may be, for example, cylindrical, fusiform, or other regular or irregular shapes. In some embodiments, the flange member 10 is substantially conical, or umbrella-like canopy shape. Since the flange member 10 is formed by radially expanding deformed portions, the proximal and distal portions of the deformed portions form the inner and outer covers of the flange member 10, respectively. Wherein the proximal part forms an inner canopy and the distal part forms an outer canopy, the inner canopy facing towards the proximal end of the entire device, in fact being the main component of the rack for stone retrieval acting directly on stones during the stone retrieval process. Due to the shape characteristics of the umbrella-shaped structure, the inner umbrella surface has a tendency of gradually inclining from the edge to the center from the near end to the far end, and the tendency enables the inner umbrella surface to push the calculus to gradually move from the edge to the center as the body 1 moves towards the near end in the organ lumen in the calculus removing process, so that the probability of the calculus missing from the edge is reduced.

In addition, since at least two flange members 10 are provided, in a narrow and wet organ lumen, contact with the inner wall of the lumen is made more intimate. Therefore, in the process of drawing the body 1 outwards, negative pressure is generated in the pipe cavity at the far end of the body 1, so that the inner wall of the pipe cavity extrudes the small calculus at the far end, the small calculus is taken out along with the drawing of the body 1, and the calculus removal rate is further improved.

In general, in each type of surgical operation, instruments inserted into the body cause some degree of irritation and even damage to the organ, and efforts should be made to reduce such adverse effects. Thus, in some embodiments, the body 1 may be configured to: when the device is in an open state, the device only has two flange parts 10, and the layered calculus removing structure formed by combining the two flange parts 10 is a double-flange structure, so that on one hand, the calculus removing rate can be kept at a high level, and on the other hand, repeated friction on organs due to the arrangement of excessive flange parts 10 can be avoided, and the irritation and injury to the organs are reduced as much as possible.

In some embodiments, the body 1 further comprises support portions 11, the support portions 11 and the deformation portions being arranged alternately in the axial direction and connected in sequence. The number of the supporting portions 11 is set according to the number of the deformation portions, and generally 1 more than the number of the deformation portions, for example, 2 deformation portions, and 3 supporting portions 11 are set at the proximal end, the distal end and the middle of the two deformation portions, respectively, the supporting portion 11 at the proximal end is connected with the connecting portion 3, the supporting portion 11 at the distal end is connected with the guide tip 2, and the supporting portion 11 at the middle is connected with the two adjacent deformation portions. When the flange part 10 is in the shape of a canopy of an umbrella in some embodiments, the support part 11 is combined with the flange part 10 in an umbrella shape, and the support part 11 can be regarded as a pillar of an umbrella structure.

In some embodiments, the flexible body 1 presents a tubular shape with substantially the same diameter over its entire length in the stowed condition, and its deformation, when switching from the stowed condition to the open condition, radially outwardly expands to form a flange part 10 projecting over the support 11, with the adjacent supports 11 simultaneously being axially close to each other. This provides two advantages, one is that the stone extractor can be smoothly inserted into the outer tube 5 for storage, and the flange member 10 can be restored to perform stone extraction operation when protruding from the outer tube 5, thereby realizing smooth switching between the storage state and the open state; on the other hand, when the body 1 is drawn out from the organ lumen in the lithotomy, the pulling force of the inner tube 4 and the friction force of the inner wall of the organ are opposite to each other, so that the body 1 can be lengthened and thinned to some extent, and the risk of incarceration at the outlet is avoided.

In the embodiment of the present invention, the guiding end head 2 is connected to the distal end of the body 1 for guiding the insertion process. The guiding end 2 is generally a ball head, and can be made of metal or medical polymer material. The surface is smooth and burr-free, and the organ is prevented from being damaged.

In some embodiments, the lithotomy support is further provided with a connecting part 3 connected to the proximal end of the body 1 for connecting the whole lithotomy support to the inner tube 4 of the lithotomy device, so that the lithotomy support can be driven by the inner tube 4 to complete the switching between the storage state and the open state and complete the lithotomy operation.

Generally, in order to reduce the complexity of the structure, the supporting portion and the deformation portion of the body 1 may be integrally formed. Referring again to fig. 1-5, in some embodiments:

the flexible material that body 1 adopted is the silk material 12, and specifically says, adopts one or more silk materials 12 to make into fine network structure in the form of weaving.

In this embodiment, the transformation of the shape of the body 1 between the open state and the housed state is achieved by the deformation of each wire 12 itself and the mutual cooperation of all the wires 12. The main material selection direction of the wire material 12 is shape memory alloy such as nickel-titanium alloy and/or medical polymer material, and the material has shape memory performance and elasticity. After the combined braided structure is combined into the structure shown in the figure, in the process that the inner tube 4 is pulled into the outer tube 5, each wire 12 can generate deformation under the mixed action of the pulling force of the inner tube 4 and the pressure of the outer tube 5, and the deformation is displayed on the whole, namely the body 1 is stretched in the axial direction and compressed in the radial direction, the supporting parts 11 are gradually separated from each other, and the deformation parts are gradually folded inwards from the stretching state until the body 1 becomes a roughly round tube shape.

The advantage of adopting silk material 12 to weave formation body 1 lies in, weaves and can form tiny hole between each silk material 12, and these holes create the condition for silk material 12 draws close each other to the deformation portion can inwards draw in into the tubulose from the state that struts, and then makes body 1 follow the deformation of open mode to the state of holding more smooth and easy.

In some embodiments, the body 1 is also a net structure, but unlike the way of weaving with wires, in this embodiment the mesh is formed by engraving. For example, fine meshes can be carved in an overall structure formed by shape memory alloy such as nickel-titanium alloy or medical polymer materials, and the pores formed by the meshes also create conditions for the contraction and gathering of the overall structure, so that the deformation of the overall structure is smoother.

In addition, in some embodiments, the body 1 may also be manufactured by a method such as 3D printing.

Corresponding to the above-mentioned calculus removing bracket, the present invention further provides an embodiment of the calculus removing device, as shown in fig. 6-7, which in some embodiments comprises an inner tube 4, an outer tube 5 and a handle assembly 6 in addition to the above-mentioned calculus removing bracket.

Wherein, the inner tube 4 is connected at the near end of the stone taking bracket and riveted with the connecting part 3. The outer tube 5 is sleeved outside the inner tube 4, and the diameter of the outer tube 5 is slightly larger than that of the connecting part 3.

The handle assembly 6 comprises a first handle 61 for driving the inner tube 4 and a second handle 62 for driving the outer tube 5. The second handle 62 is fixedly connected to the outer tube 5 and has an axial through hole through which the inner tube 4 is fixedly connected to the first handle 61. In operation, the body 1 of the stone taking bracket can be switched between the storage state and the opening state by holding the first handle 61 and the second handle 62 and driving the inner tube 4 to slide relative to the outer tube 5.

In some embodiments, the connecting portion 3 is a connecting tube riveted to the distal end of the inner tube 4.

The action process of the device is described again by taking the bile duct calculus removing device applied to the ERCP as an example: in preparation for surgery, the device is initially in a stowed condition, as shown in figure 8, with the connecting portion 3 and the body 1 both disposed within the outer tube 5. It is delivered to the duodenal papilla through an endoscopic clamp tract and then enters the bile duct. After reaching above the stone, the body 1 is gradually extended from the outer tube 5 by pulling the second handle 62 towards the first handle 61, causing the outer tube 5 to slide backwards relative to the inner tube 4, thereby opening the flange member 10. Then the device is pulled out of the bile duct, and the calculus can be pulled out, falls into the intestinal tract and is discharged out of the body along with the digestion process.

After the stone removal is finished, the second handle 62 is pushed forwards, and the connecting part 3 and the body 1 of the stone removal support are inserted into the outer pipe 5 again so as to facilitate the withdrawal of the device.

What need to say in particular is, to the bile duct calculus that changes its course after the surgery, terminal and intestinal acutangular angle in the calculus extraction process, adopt general (traditional) sacculus or basket mode to get the calculus difficulty, and the utility model discloses a calculus extraction support can straighten the angle, therefore takes out the calculus very easily.

Unlike the above embodiments, please refer to fig. 9-13 again, in some other embodiments:

the body 1 is not woven by flexible wires 12, but is made of medical elastic polymer film, and the original shape is shown in the figure. In the process of being gradually drawn into the outer tube 5, the elastic polymer film is subjected to the pulling force of the inner tube 4 and the pressure of the wall of the outer tube 5, and the elastic polymer film can be stretched and deformed to a certain extent, so that the supporting portions 11 thereof gradually move away from each other, and the deformed portions are gradually stretched and tapered, and finally, the tubular storage state shown in fig. 14 is achieved. When extended from the outer tube 5, it returns to its original shape, open position, due to its shape memory properties, for removal of the stone.

Further, in the calculus removing holder shown in fig. 15, unlike the above embodiment, the calculus removing holder has only one flange member 10 when it is in the open state, and this structure can also successfully perform calculus removing operation, but its efficiency is lowered with respect to the structure in which two or more flange members 10 are provided.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The stone-taking bracket and the stone-taking device provided by the embodiment of the utility model are introduced in detail, the principle and the implementation mode of the utility model are explained by applying specific examples, and the description of the above embodiments is only used for helping to understand the technical scheme and the core idea of the utility model; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present invention in its various embodiments.

Claims (10)

1. A stone extraction support, comprising:

a body (1) having an open state and a storage state; when the body (1) is in the open state, the body comprises at least two flange parts (10), and the flange parts (10) are arranged in a laminated mode to form a layered stone taking structure;

a guiding end head (2) connected to the far end of the body (1).

2. Stone-fetching support according to claim 1, characterized in that the body (1) is a flexible body, which is deformable to switch between the open state and the stowed state.

3. Stone-fetching holder according to claim 1, characterized in that the body (1) comprises a deformation;

in the open state, the deformation portion is expanded to form the flange member (10);

in the stowed state, the deformation stretches to form a tubular structure.

4. The lithotomy support according to claim 3, characterized in that the body (1) further comprises support portions (11), the support portions (11) and the deformation portions being alternately arranged and connected;

in the open state, the adjacent support portions (11) are close to each other;

when in the storage state, the adjacent support parts (11) are separated from each other.

5. Stone-fetching support according to claim 1, characterized in that the body (1) is integrally formed.

6. Stone-fetching stent according to claim 1, characterized in that the body (1) is a net-like structure formed by weaving or engraving.

7. The stone extraction support of claim 1, further comprising:

and the connecting part (3) is connected to the near end of the body (1).

8. A stone extraction device comprising a stone extraction holder as claimed in any one of claims 1 to 7, and:

an inner tube (4) connected to the proximal end of the lithotomy stent;

the outer pipe (5) is sleeved outside the inner pipe (4);

the handle assembly (6) is used for driving the inner tube (4) to slide relative to the outer tube (5) so that the body (1) is inserted into the outer tube (5) or extends out of the outer tube (5) to realize switching between the storage state and the opening state.

9. The lithotomy device of claim 8, wherein the handle assembly comprises:

a first handle (61) connected to the inner tube (4);

a second handle (62) connected to the outer tube (5);

the second handle (62) has an axial through-hole through which the inner tube (4) passes.

10. The lithotomy device according to claim 8, characterized in that the inner tube (4) is connected to the connection part (3) of the lithotomy holder, said connection part (3) being a connection tube.

Images