CN106073868B

CN106073868B - Medical fetching device

Info

Publication number: CN106073868B
Application number: CN201610538689.2A
Authority: CN
Inventors: 孙宝峰; 张帆; 常杰
Original assignee: Jiangsu Fengh Medical Equipment Co Ltd
Current assignee: Jiangsu Fengh Medical Equipment Co Ltd
Priority date: 2016-07-08
Filing date: 2016-07-08
Publication date: 2020-10-09
Anticipated expiration: 2036-07-08
Also published as: CN106073868A

Abstract

The invention discloses a medical fetching device, which comprises: a bag body having a closed end and an open end; a bag opening tightening line, wherein one end of the bag opening tightening line penetrates through the opening end of the bag body; the other end of the bag opening tightening line extends to the far end of the core rod assembly along the near end of the core rod assembly; the handle is connected with the far end of the core rod assembly, and the other end of the bag opening tightening line forms a slipknot at the handle. According to the medical fetching device, the bag body is detachably connected to the medical fetching device, the slipknot of the bag opening tightening line is always outside the outer sleeve, a doctor can untie the slipknot at any time according to the operation requirement, and then the bag body and the bag opening tightening line are separated from the medical fetching device, so that the medical fetching device is beneficial to quickly fetching a specimen, the pain of a patient is reduced, and the specimen fetching time can be effectively shortened.

Description

Medical fetching device

Technical Field

The invention relates to a surgical instrument, in particular to a medical fetching device, and belongs to the field of medical instruments.

Background

Laparoscopic surgery has the advantages of short time, less trauma, less pain, quick recovery, etc., and has been adopted by more and more surgeons and accepted by patients. In the endoscopic surgery, a minimally invasive surgical instrument is inserted into an abdominal cavity for operation through a puncture outfit sleeve inserted on a skin operation incision of a human body, and specimens with different sizes and properties, such as tumor tissues, stones, foreign bodies and the like, can be cut or taken out in the surgery; how quickly, completely and safely the excised specimens are removed is an important link for the success of the surgery.

The medical fetching device is specially developed aiming at the operation requirements of laparoscopic surgery, can take out surgical resection objects (such as malignant tumor, cystic tissue, purulent resection objects, endometrium and other tissues) at one time, effectively prevents pathological change tissues from contacting with healthy tissues, avoids pathological residue, can reduce the difficulty of the surgery, saves the surgery time, improves the surgery efficiency, is favorable for postoperative rehabilitation of patients, reduces postoperative infection risks of the patients, and saves a large amount of recessive treatment cost for the patients.

In the prior art, the medical fetching device used clinically is provided with a limiting groove and a fixing hole of a bag mouth tightening line on a core rod, the bag mouth tightening line forms a slipknot on the outer surface of the middle part of the core rod, and the slipknot is positioned between the core rod and an outer sleeve.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide the medical fetching device which is reasonable and reliable in structural design, simple in process and easy to perform the line-releasing operation. The invention is realized by the following technical scheme:

a medical extraction device, comprising: a bag body having a closed end and an open end; a bag opening tightening line, wherein one end of the bag opening tightening line penetrates through the opening end of the bag body; the other end of the bag opening tightening line extends to the far end of the core rod assembly along the near end of the core rod assembly; the handle is connected with the far end of the core bar assembly, a slipknot is formed at the handle after the bag opening tightening wire is tightened, the core bar assembly comprises a core bar and a fixing unit, a first wire groove is formed in the fixing unit, and at least one axial through hole is formed in the core bar to form a second wire groove; a third wire groove is formed in the handle; the central axis of the first wire groove, the central axis of the second wire groove and the central axis of the third wire groove are all overlapped, the first wire groove, the second wire groove and the third wire groove form a straight line channel, and the bag opening tightening line is contained in the straight line channel.

A medical extraction device, comprising: a bag body having a closed end and an open end; a bag opening tightening line, wherein one end of the bag opening tightening line penetrates through the opening end of the bag body; the other end of the bag opening tightening line extends to the far end of the core rod assembly along the near end of the core rod assembly; the handle is connected with the far end of the core rod assembly, and the other end of the bag opening tightening line forms a slipknot at the handle; the bag opening tightening wire penetrates through the first wire groove and extends to the near end of the core rod; the bag mouth tightening line extends from the proximal end of the core rod to the distal end of the core rod along the outer surface of the core rod.

The other end of the bag mouth tightening line forms a slipknot at the handle.

The bag mouth tightening line penetrates through the first line groove and extends to the near end of the core rod.

The bag mouth tightening line extends from the near end of the core rod to the far end of the core rod through the second line groove.

The central axis of the axial through hole is coincided with the central axis of the core rod.

The handle is provided with a third wire groove, and the bag opening tightening wire penetrates through the third wire groove to form a slipknot.

The core bar assembly comprises a core bar and a fixing unit, a first wire groove is formed in the fixing unit, and a third wire groove is formed in the handle; the central axis of the first wire groove and the central axis of the third wire groove are overlapped.

The medical fetching device further comprises an outer sleeve, wherein the core bar assembly can extend into the outer sleeve, can axially move along the outer sleeve and can rotate along the central axis of the core bar assembly in the outer sleeve.

The wall of the core rod is also provided with a containing through hole, and the tail end of the bag opening tightening line is contained in the containing through hole in the core rod after the other end of the bag opening tightening line forms a slipknot.

According to the medical fetching device, the bag body is detachably connected to the medical fetching device, the slipknot of the bag opening tightening line is always positioned outside the outer sleeve, a doctor can untie the slipknot at any time according to operation needs, and then the bag body and the bag opening tightening line are separated from the medical fetching device, so that the medical fetching device is beneficial to quickly fetching a specimen, the pain of a patient is reduced, and the specimen fetching time can be effectively shortened.

Drawings

FIG. 1 is a state view of a medical retrieval device according to an embodiment of the present invention before use;

FIG. 2 is a state diagram of a medical retrieval device in use, according to an embodiment of the present invention;

FIG. 3 is an exploded view of a medical retrieval device according to an embodiment of the present invention;

FIG. 4 is an exploded view of the core rod assembly and support mechanism in cooperation according to an embodiment of the present invention;

FIG. 5 is an exploded and enlarged view of the fixing unit;

FIG. 6 is a central axis cross-sectional view of a medical retrieval device taken along a cinch line slot of a pouch according to an embodiment of the present invention;

FIG. 7 is a schematic view of a support mechanism of the medical retrieval device in accordance with an embodiment of the present invention;

FIG. 8 is an enlarged partial schematic view of the structure at A in FIG. 7;

FIG. 9 is an axial cross-sectional view of a support mechanism of a medical retrieval device in cooperation with a core rod assembly along a first recess with portions of the components omitted for clarity of illustration of the assembly according to an embodiment of the present invention;

fig. 10 is a partially enlarged view of the structure at B in fig. 9.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In the description of the present invention, it is to be understood that the terms "proximal", "distal", "central", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered 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, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1 to 3, the medical fetching device according to the embodiment of the present invention includes a bag body 1, a supporting mechanism 2, a core bar assembly 3, an outer sleeve 4, a handle 5, a bag mouth tightening line 6, and a handle 7.

As shown in fig. 2, the bag body 1 has an open end 11 and a closed end 12, the material of the inner wall of the bag body 1 is preferably TPU (thermoplastic polyurethane), the edge of the open end 11 of the bag body 1 is folded into two layers into the bag body 1 and then is heat-sealed to form a non-closed annular channel 111, one end of the bag mouth tightening line 6 penetrates through the non-closed part of the non-closed annular channel 111 and penetrates out of the other non-closed part of the non-closed annular channel 111, and a fisher knot is formed at the non-closed part of the annular channel and the other end of the bag mouth tightening line 6; one

end

211, 221 of the support mechanism 2 respectively penetrates into the non-closed annular channel 111 from two non-closed positions of the non-closed annular channel 111. Because the bag body 1 enters the abdominal cavity, the outer wall of the bag body 1 needs to be in contact with body fluid and has the characteristics of water resistance, moisture resistance, oxidation deterioration resistance and the like, the medical nylon coated cloth is preferably selected as the material of the outer wall of the bag body 1.

Referring to fig. 3 to 5, the core bar assembly 3 includes a core bar 33 and a fixing unit including a first fixing member 31 and a second fixing member 32. The core rod assembly 3 is provided with at least one groove, which is provided on the first fixing element 31 and/or the second fixing element 32, including but not limited to the following cases: the first fixing element 31 is provided with at least one groove; the second fixing element 32 is provided with at least one groove; at least one recess is provided on each of the first fixing element 31 and the second fixing element 32. In this embodiment, preferably, the first fixing element 31 and the second fixing element 32 are both provided with two grooves, that is, the first fixing element 31 is provided with a first groove 315 and a second groove 316, and the first groove 315 and the second groove 316 are respectively located at two sides of the central axis of the fixing unit and are symmetrical in position; the second fixing element 32 is provided with a third groove 325 and a fourth groove 326, and the third groove 325 and the fourth groove 326 are respectively positioned at two sides of the central axis of the fixing unit and are symmetrical in position; the first groove 315, the second groove 316, the third groove 325 and the fourth groove 326 have the same groove length and the same groove width; the first recess 315 and the third recess 325 have the same size and shape, and the second recess 316 and the fourth recess 326 have the same size and shape. The first groove 315 and the fourth groove 326 jointly form an installation fixing groove of the first support frame 21, the second groove 316 and the third groove 325 jointly form an installation fixing groove of the second support frame 22, the size and the shape of the first fixing element 31 and the second fixing element 32 are the same, and thus, only one pair of dies needs to be opened for the two fixing elements, so that the production cost is saved, the processing and the manufacturing are convenient, and in the using process, the stress is balanced.

A plurality of grooves are arranged on the fixing unit of the core bar component 3 and used for accommodating the bag opening tightening line 6 and the supporting mechanism 2; specifically, the fixing unit of the core bar assembly 3 is provided with a first wire groove 34, the first wire groove 34 may be only located on the first fixing element 31, only located on the second fixing element 32, or the first wire groove 34 is a channel formed by the first fixing element 31 and the second fixing element 32 together. Referring to fig. 5, in the present embodiment, it is preferable that the first fixing element has a fifth groove 319, the first fixing element has a sixth groove 329, the fifth groove 319 and the sixth groove 329 together form the first wire groove 34, and the central axis of the first wire groove 34 coincides with the central axis of the fixing unit, that is, half of the first wire groove 34 is located on the first fixing element 31, and the other half is located on the second fixing element 32.

For convenience of description and simplification of description, in the present embodiment, based on the orientation or positional relationship shown in the drawings, one end of each member in the direction toward the bag body 1 is referred to as a "proximal end", and one end in the direction toward the handle 7 is referred to as a "distal end". The other end of the pocket cinch line 6, after exiting the first wire slot 34, may extend from the proximal end of the stem 33 along the outer surface of the stem 33 to the distal end of the stem 33, or may extend from the inner portion of the stem 33 along the proximal end of the stem 33 to the distal end of the stem 33. When the pocket-mouth tightening wire 6 extends from the proximal end of the core rod 33 to the distal end of the core rod 33 along the outer surface of the core rod 33, the outer surface of the core rod 33 is provided with a limiting groove or a wire fixing buckle. When the bag mouth cinch cord 6 extends from the proximal end of the stem 33 along the interior of the stem 33 to the distal end of the stem 33, as shown in FIG. 6, at least one axial through-hole is provided in the stem 33 for providing access to the bag mouth cinch cord 6, which is a second cord slot 35, and the bag mouth cinch cord 6 extends from one end (i.e., the proximal end) of the stem 33, through the second cord slot 35, and through the stem 33 to the other end (i.e., the distal end) of the stem 33. In this embodiment, it is preferable that an axial through hole is formed in the core rod 33, the axial through hole is a second wire groove 35, and a central axis of the axial through hole coincides with a central axis of the core rod 33, that is, the central axis of the second wire groove 35 coincides with the central axis of the core rod 33, that is, the core rod 33 is a hollow circular tube, the second wire groove 35 is a hollow cylinder in the core rod 33, further, a diameter of the second wire groove 35 is equal to an inner diameter of the core rod 33, and a length of the second wire groove 35 is the same as a length of the core rod 33, that is, an inner wall of the core rod 33 surrounds the second wire groove 35. The bag mouth tightening line 6 passes through the second line groove 35 and extends from one end of the core bar 33 to the other end of the core bar 33.

The core bar 33 is further provided with at least one positioning hole for fixedly connecting the fixing unit with the core bar 33, and correspondingly, the fixing unit is provided with at least one positioning column. In this embodiment, preferably, at least two positioning holes are formed on the core bar 33, and the two positioning holes are symmetrically arranged. Correspondingly, a pair of positioning columns is arranged on the fixing unit, and the two positioning columns are symmetrically arranged. Specifically, as shown in fig. 4 and 5, the first fixing element 31 and the second fixing element 32 each have a positioning post thereon, the positioning post 318 of the first fixing element 31 is inserted into a corresponding positioning hole 332 of the core rod 33 for fixing, and the positioning post of the second fixing element 32 is inserted into another positioning hole symmetrically disposed with respect to the positioning hole 332 of the core rod 33 for fixing, so as to fix the fixing unit on the core rod 33. The fixing unit further includes a receiving groove 317, the core bar 33 is at least partially fixed in the receiving groove 317, and the positioning column is located in the receiving groove 317, so that the core bar 33 and the fixing unit can be firmly connected. The number of the positioning columns and the positioning holes is determined according to the combination strength and firmness of two matched parts.

As shown in fig. 6, the handle 7 is provided with a third wire groove 73, the third wire groove 73 may be only located on the left handle 71, only located on the right handle 72, or the third wire groove 73 is a channel formed by the left handle 71 and the right handle 72. In the present embodiment, the third linear groove 73 is preferably a hollow cylinder in the handle 7, and further, the central axis of the third linear groove 73 coincides with the central axis of the handle 7, that is, half of the third linear groove 73 is located on the left handle 71, and the other half is located on the right handle 72. The bag mouth tightening line 6 is tightened after passing through the third line groove 73, and forms slipknot fixation at the handle 7.

As shown in fig. 4, the wall of the core bar 33 is further provided with a receiving through hole 331, and after the other end of the bag-mouth fastening line 6 is formed into a slip knot, the end is received in the receiving through hole 331 of the core bar 33. On one hand, the tail end of the bag mouth tightening line 6 is a free end, and in the process of storage and transportation, the bag mouth tightening line can be knotted or enter between the outer sleeve 4 and the core rod component 3, or the slipknot is opened due to external force; on the other hand, the tail end is scattered freely to affect the beauty of the product, and the tail end is collected into the containing through hole 331 on the core rod 33, so that the whole appearance of the medical fetching device is neat and beautiful.

In summary, one end of the bag mouth tightening line 6 penetrates through the unclosed part of the unclosed annular channel 111 of the bag body 1 and penetrates out of the other unclosed part of the unclosed annular channel 111, and a fisherman knot is formed at the unclosed part of the annular channel. The other end of the bag mouth tightening line 6 sequentially passes through the first line groove 34 on the fixing unit, the second line groove 35 in the core bar 33 and the third line groove 73 on the handle 7 to be tightened, a slipknot is formed at the tail end 74 of the third line groove 73, and the tail end is drawn into the containing through hole 331 on the core bar 33. The proximal end of the second wire groove 35 is connected with the distal end of the first wire groove 34, the distal end of the second wire groove 35 is connected with the proximal end of the third wire groove 73, and the central axes of the first wire groove 34, the second wire groove 35 and the third wire groove 73 are all coincided, that is, the channel of the bag mouth tightening wire 6 is a linear channel.

In the prior art, one end of a bag mouth tightening line 6 forms a fisherman knot at the non-closed part of the annular channel of the bag body 1, the other end of the bag mouth tightening line extends along the axial direction of the core rod component, a slipknot is formed at the axial direction of the core rod component close to the middle position, and the bag mouth tightening line is arranged in the outer sleeve. Specifically, the outer surface of the core bar component 3 is provided with a limiting groove and a plurality of fixing holes of the bag opening tightening line 6, the limiting groove is axially arranged along the core bar component 3, and the bag opening tightening line 6 is arranged in the limiting groove and needs to penetrate through the fixing holes to form slipknots to be fixed on the core bar component. Before use, the core bar component is completely positioned in the outer sleeve, so that the slipknot of the bag opening tightening line 6 and the core bar component are positioned in the outer sleeve together; when the bag body is used, when the bag body needs to be separated from the medical fetching device, a doctor needs to axially move the core rod component to a certain degree from the outer sleeve to expose the slipknot out of the outer sleeve, and the bag body can be separated only by opening the slipknot. According to the medical fetching device designed by the invention, the slipknot of the bag mouth tightening line 6 is always arranged outside the outer sleeve 4, so that a doctor can untie the slipknot at any time according to the operation requirement, and further the bag body 1 and the bag mouth tightening line 6 are separated from the medical fetching device, so that the doctor can obtain a specimen quickly, the pain of a patient, the risk of operation infection and the like are reduced, the specimen taking time can be effectively shortened, the central axes of the first line groove 34, the second line groove 35 and the third line groove 73 are coincident, namely, the channel of the bag mouth tightening line 6 is a linear channel, and the bag mouth tightening line 6 can be smoothly wound and released in the channel.

The core bar component 3 can extend into the outer sleeve 4, and the core bar component 3 and the supporting mechanism 2 are respectively provided with a positioning and mounting structure which is matched with each other; preferably, the positioning and mounting structure is a positioning rib and a positioning groove. Furthermore, at least one positioning rib is arranged on the core rod assembly 3, and at least one positioning groove is arranged on the supporting mechanism 2. In this embodiment, the core bar assembly 3 is provided with two positioning ribs, and the supporting mechanism 2 is provided with two positioning grooves.

As shown in fig. 7, the support mechanism 2 includes a first support frame 21 and a second support frame 22. Preferably, the first support frame 21 and the second support frame 22 have the same size and shape, and when assembling, one of the support frames is turned over by 180 degrees to obtain the other support frame which is symmetrically arranged; before turning over, the first positioning groove 231 and the second positioning groove 232 on the installation fixed end 23 of the first support frame 21 are in the same direction as the two positioning grooves on the installation fixed end of the second support frame 22; after the turning, the orientations of the two positioning grooves on the mounting fixing ends of the first positioning groove 231, the second positioning groove 232 and the second supporting frame 22 are opposite, so as to match with the positioning rib in the first groove 315 on the first fixing element 31 and the positioning rib in the third groove 325 on the second fixing element 32. Therefore, only one pair of dies is needed to be opened for the two support frames, so that the production cost is saved, the processing and the manufacturing are convenient, and in the using process, the stress is balanced. When the open end 11 of the receptacle 1 is tightened, the proximal end 211 of the first support 21 abuts the proximal end 221 of the second support 22. When the open end 11 of the receptacle 1 is unfolded, the proximal end 211 of the first support 21 is separated from the proximal end 221 of the second support 22.

As shown in fig. 7 to 8, the first support frame 21 and the second support frame 22 have the same size and shape, and the other ends (i.e., the mounting ends) are all linear and respectively provided with at least one positioning groove. In the present embodiment, taking the first supporting frame 21 of the supporting mechanism 2 as an example, in the present embodiment, the installation fixing end 23 of the first supporting frame 21 is provided with two positioning grooves: a first positioning groove 231 and a second positioning groove 232. The two positioning grooves have the same size and shape, and the cross-sectional shapes of the first positioning groove 231 and the second positioning groove 232 are both open rectangles, open trapezoids or U-shapes. The thickness of the positioning groove is equal to that of the installation fixed end 23 of the first support frame 21; in this embodiment, preferably, the depth of the positioning groove is less than or equal to half of the width of the supporting mechanism 2; if the depth of the positioning groove is too large, the width of the first support frame 21 right above the positioning groove is small, the strength is weak, and the tensile requirement cannot be met. The length of the positioning groove is more than or equal to one time of the depth of the positioning groove, and the two positioning grooves correspond to the two positioning ribs one by one; if the length undersize of constant head tank, correspondingly, the length of location muscle is less, and consequently the intensity of location muscle is weak, uses during the medical load handling device, the location muscle has cracked risk, causes supporting mechanism 2 to break away from core bar subassembly 3, makes sample and bag body 1 be difficult to take out patient's abdominal cavity, brings a great deal of inconvenience for doctor and patient. As shown in fig. 8, the first positioning slot 231 and the second positioning slot 232 are spaced apart from each other at the fixed end 23 of the supporting mechanism 2, and the distance between the two positioning slots is greater than or equal to the length of one positioning slot. As shown in fig. 9 to 10, at least one positioning rib is respectively disposed in the first groove 315 on the first fixing element 31 and the third groove 325 on the second fixing element 32, taking the first groove 315 as an example, in this embodiment, preferably, two positioning ribs are disposed in the first groove 315: the first positioning rib 3151 and the second positioning rib 3152 are rectangular parallelepiped or open trapezoidal or U-shaped protrusions. As shown in fig. 10, the height of the projection is equal to or less than the depth of the detent groove. The first positioning rib 3151 and the second positioning rib 3152 are arranged in the first groove 315 at intervals, and the distance between the two protrusions is greater than or equal to the length of one protrusion. The sizes and shapes of the first positioning rib 3151 and the second positioning rib 3152 correspond to the first positioning groove 231 and the second positioning groove 232 of the mounting fixed end 23 of the first support frame 21 one by one. Therefore, the mounting and fixing end 23 of the first support frame 21 is mounted and fixed in the groove 315 of the first fixing element 31, and the positioning rib in the groove 315 of the first fixing element 31 is fixed in cooperation with the positioning groove of the first support frame 21, that is, the first positioning groove 231 is fixed in cooperation with the first positioning rib 3151, and the second positioning groove 232 is fixed in cooperation with the second positioning rib 3152. The third recess 325 has the same size and shape as the first recess 315, and is symmetrically disposed with respect to the first recess 315. On one hand, the first positioning groove 231 and the second positioning groove 232 are respectively matched and fixed with the first positioning rib 3151 and the second positioning rib 3152 in the groove 315; on the other hand, the first fixing element 31 is connected with the second fixing element 32 in a matching manner and presses and fixes the installation fixing end of the supporting mechanism 2 between the first fixing element and the second fixing element, and on any one of the two aspects, the supporting mechanism 2 can be fixedly connected with the core rod assembly 3, and the two aspects are combined together, so that the fixing effect is better.

As shown in fig. 4, the core rod assembly 3 includes a core rod 33, a first fixing element 31 and a second fixing element 32, the first fixing element 31 is disposed at a proximal end of the core rod assembly 3, the second fixing element 32 and the first fixing element 31 cooperate with each other to fix the mounting fixing end 23 of the first support frame 21, and further, the first fixing element 31 and the second fixing element 32 of the core rod assembly 3 are connected in an interference or transition fit manner. The first fixing element 31 is provided with a mounting post and a mounting hole at the same time, and the second fixing element 32 is provided with a mounting hole and a mounting post corresponding to the mounting post; alternatively, one of the first fixing element 31 and the second fixing element 32 is provided with a mounting post, and the other is provided with a mounting hole (not shown).

In the present embodiment, it is preferable that both the first fixing element 31 and the second fixing element 32 have the mounting posts and the mounting holes. Further, the first fixing element 31 is provided with 3 mounting posts and 3 mounting holes, and correspondingly, the second fixing element 32 is provided with 3 mounting holes and 3 mounting posts. The size and shape of the mounting holes on the first fixing element 31 and the second fixing element 32 are the same, and the size and shape of the mounting posts are the same.

The mounting posts and the mounting holes are symmetrically arranged on the fixing unit, specifically, 3 mounting posts and 3 mounting holes on the first fixing element 31 are respectively located on two sides of the first wire slot 34 and are symmetrical in position, and 3 mounting holes and 3 mounting posts on the second fixing element 32 are respectively located on two sides of the first wire slot 34 and are symmetrical in position. The symmetrical design is convenient to process and manufacture, the cost is relatively low, and the stress is balanced in the using process.

It should be noted that, the layout of the mounting holes and the mounting posts on the first fixing element 31 and the second fixing element 32 may also be that X mounting posts are arranged on the first fixing element 31; correspondingly, the second fixing element 32 is provided with X mounting holes (wherein X is greater than or equal to 2); or the first fixing element 31 is provided with N mounting posts and M mounting holes, and correspondingly, the second fixing element 32 is provided with N mounting holes and M mounting posts (where N is greater than or equal to 1, and M is greater than or equal to 1). The size, the shape and the number of the mounting columns and the mounting holes can be changed as required, and the layout of the mounting columns and the mounting holes on the second fixing element and the first fixing element can be changed as required so as to meet the requirements of the bonding strength and the firmness of two matched parts. The present embodiments are exemplary, are intended to be illustrative of the invention, and are not to be construed as limiting the invention.

The mounting post and the mounting hole on one end of the first fixing element 31 of the core rod assembly 3 are connected with the mounting hole and the mounting post on the second fixing element 32 in an interference fit or transition fit manner. The upper limit size of the mounting hole is smaller than or equal to the lower limit size of the mounting column, namely, interference fit is realized; or the upper limit size of the mounting hole is larger than the lower limit size of the mounting column, and the lower limit size of the mounting hole is smaller than the upper limit size of the mounting column, namely transition fit. The first mounting hole 311 and the first mounting post 321, the second mounting hole 312 and the second mounting post 322, and the third mounting hole 313 and the third mounting post 323 correspond to each other one by one, and are connected in an interference or transition fit manner.

Preferably, the cross section of the mounting column is circular, and the cross section of the mounting hole is polygonal. If the cross sections of the mounting post and the mounting hole are circular, the mounting hole and the mounting post are in surface-to-surface contact during assembly, and the first fixing element 31 and the second fixing element 32 can be matched with each other only by adopting manual hammering, press pressing, cold mounting or hot mounting during interference or transition fit. In order to overcome the assembly difficulty, the cross section of the mounting column in the medical fetching device is circular, the cross section of the mounting hole is polygonal, and preferably, in the embodiment, the cross section of the mounting hole is regular hexagon; therefore, when the first fixing element 31 and the second fixing element 32 are in interference fit or transition fit, the mounting holes and the mounting columns are in tangential contact of the plane and the circumferential surface, the mounting reliability requirement can be met by properly adjusting the magnitude of interference, assembly can be carried out manually at normal temperature without other tools, and the mounting device is simple in process, reliable in structure and convenient to assemble.

The mandrel assembly 3 extends into and is located within the outer sleeve 4 and is axially movable within the outer sleeve 4, and the handle 7 includes a left handle 71 and a right handle 72. The other end of the core bar 33 is provided with a handle 7, and the core bar 33 is also provided with at least one positioning hole for the handle 7. In this embodiment, preferably, four positioning holes for the handle 7 are formed in the core bar 33, and correspondingly, the left handle 71 and the right handle 72 each have two first positioning posts, and the two first positioning posts of the left handle 71 and the two first positioning posts of the right handle 72 are inserted into the corresponding positioning holes of the core bar 33 to be connected in a matching manner, so as to fix the handle 7 on the core bar assembly 3. The right handle 72 is further provided with a second positioning column, the left handle 71 is provided with a second positioning hole, and the second positioning column of the right handle 72 is inserted into the second positioning hole of the left handle 71 and is in interference fit or transition fit connection. The number of the first positioning columns and the first positioning holes, and the number of the second positioning columns and the second positioning holes are determined according to the requirement for the bonding strength and firmness of the two matched parts. The left handle 71 and the right handle 72 are fixedly connected to the core rod through the second positioning column and the second positioning hole in an interference fit or transition fit manner. Two third positioning holes (not marked in the figure) are arranged on the outer sleeve 4, a handle 5 is also arranged outside the outer sleeve 4, and the handle 5 is of a symmetrical structure. The handle 5 is divided into a left handle 51 and a right handle 52. The left handle 51 and the right handle 52 are provided with third positioning columns, and the third positioning columns of the right handle 52 and the third positioning columns of the left handle 51 are inserted into the third positioning holes of the outer sleeve 4 to be connected in a matching manner, so that the outer sleeve 4 is fixed between the right handle 52 and the left handle 51. The right handle 52 is also provided with a fourth positioning column, the left handle 51 is provided with a fourth positioning hole, and the fourth positioning column of the right handle 52 is inserted into the fourth positioning hole of the left handle 51 and is in interference fit or transition fit connection. The number of the positioning columns and the positioning holes is determined according to the combination strength and firmness of two matched parts.

In this embodiment, before use, the support mechanism 2 of the medical fetching device is in a flattened state, the bag body 1 is folded and contracted from the closed end 12 to the open end 11, and the support mechanism 2, the bag body 1, the bag mouth tightening line 6 and a part of the core bar assembly are accommodated in the outer sleeve 4. When the medical fetching device is used, the medical fetching device enters the abdominal cavity of a patient through the puncture outfit, a doctor holds the handle 5 on the outer sleeve 4 with one hand, puts a thumb and a forefinger into the left annular hole and the right annular hole of the handle 5 respectively, and pushes the core rod assembly 3 forwards through the handle 7 with the other hand. After the supporting mechanism 2 is completely pushed out of the outer sleeve 4, the supporting mechanism 2 returns to the original state and props open the open end 11 of the bag body 1, the lap of the bag body 1 is slowly loosened, and then the bag body 1 is completely unfolded. Preferably, the support mechanism 2 can automatically form a bilateral arc when unfolded, and the bag body 1 can be in an open state without the assistance of additional instruments.

An observation instrument or an endoscope is placed in the abdominal cavity of the patient in advance, a doctor can identify and cut off the specimen through observing the display, then the specimen is obtained by using the medical fetching device, and the specimen is positioned in the bag body 1. The doctor holds handle 5 on outer tube 4 in one hand, put into left and right annular ring with thumb and forefinger respectively, and another hand passes through handle 7 and pulls core bar subassembly 3 backward, and the installation stiff end 23 of supporting mechanism 2 is earlier taken in outer tube 4, and supporting mechanism 2 is along its two side arc structures, can be taken in outer tube 4 completely, and the sack is tightened up line 6 and is slowly strained simultaneously to tighten up open end 11 of the bag body 1, and then the closed bag body 1, take out the sample from the patient abdominal cavity. Because the first positioning groove 231 and the second positioning groove 232 of the first support frame 21 are respectively matched and fixed with the two positioning ribs (the first positioning rib 3151 and the second positioning rib 3152) in the first groove 315 of the first fixing element 31, the positioning groove on the second support frame 22 is respectively matched and fixed with the two positioning ribs in the third groove 325, and the mounting hole arranged on the first fixing element 31 is in interference fit or transition fit with the mounting post on the second fixing element 32, the structure is reliable, and the support mechanism 2 can not be separated from the core rod assembly 3.

According to the size of the specimen or the requirement of an operation, when the volume of the specimen is small, a doctor can take the medical fetching device and the puncture outfit out of the incision of the abdominal cavity together, unfasten the slipknot at the other end of the bag opening tightening line 6, release the knot, and further separate the bag body and the bag opening tightening line from the medical fetching device; or the slipknot of the knot is firstly opened, the knot is released, the parts of the medical fetching device except the bag body 1 and the bag opening tightening line 6 are taken away, and then the bag body 1, the bag opening tightening line 6 and the puncture outfit are tightened and taken out from the incision of the abdominal cavity together; or the slipknot of the knot is firstly opened, the knot is released, the part of the medical fetching device except the bag body 1 and the bag opening tightening line 6 and the puncture outfit are taken away, then the opening end 11 of the bag body 1 is tightened through the fisherman knot of the bag opening tightening line 6, and then the bag opening tightening line 6 is tightened to take the bag body 1 out of the abdominal cavity incision. When the specimen is large and is difficult to take out, the specimen can be firstly cut into a plurality of small pieces in the bag body 1 or the abdominal incision is properly flared.

In conclusion, according to the medical fetching device, the bag body 1 is detachably connected to the medical fetching device, the slipknot of the bag opening tightening line 6 is always outside the outer sleeve 4, a doctor can untie the slipknot at any time according to the operation requirement, and then the bag body 1 and the bag opening tightening line 6 are separated from the medical fetching device, so that the medical fetching device is beneficial to quickly fetching specimens, the pain of a patient is reduced, and the specimen fetching time can be effectively shortened; the medical fetching device is simple in structure and low in cost, and has good use value and popularization potential.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A medical fetching device is characterized by comprising:

a bag body having a closed end and an open end, the open end forming a non-closed annular channel;

the supporting mechanism comprises a first supporting frame and a second supporting frame, and the near ends of the first supporting frame and the second supporting frame respectively penetrate into the non-closed annular channel from two non-closed parts of the non-closed annular channel;

a bag opening tightening line, wherein one end of the bag opening tightening line penetrates through the opening end of the bag body;

the other end of the bag opening tightening line extends to the far end of the core rod assembly along the near end of the core rod assembly;

the handle is connected with the far end of the core rod assembly, and the other end of the bag opening tightening line forms a slipknot at the handle;

the core bar assembly comprises a core bar and a fixing unit, wherein a first wire slot is formed in the fixing unit, and at least one axial through hole is formed in the core bar to form a second wire slot; a third wire groove is formed in the handle; the central axis of the first wire groove, the central axis of the second wire groove and the central axis of the third wire groove are all overlapped, the first wire groove, the second wire groove and the third wire groove form a straight line channel, and the bag opening tightening line is contained in the straight line channel;

the fixing unit comprises a first fixing element and a second fixing element, wherein a first groove and a second groove are formed in the first fixing element, and are respectively positioned on two sides of the central axis of the fixing unit and symmetrically arranged; the second fixing element is provided with a third groove and a fourth groove, and the third groove and the fourth groove are respectively positioned on two sides of the central axis of the fixing unit and are symmetrical in position; the first groove and the fourth groove jointly form an installation fixing groove of the first support frame, and the second groove and the third groove jointly form an installation fixing groove of the second support frame;

the central axis of the first wire groove coincides with the central axis of the fixing unit.

2. A medical fetching device is characterized by comprising:

the bag opening tightening wire penetrates through the first wire groove and extends to the near end of the core rod;

the bag opening tightening line extends from the near end of the core rod to the far end of the core rod along the outer surface of the core rod;

3. The medical fetching device according to any one of claims 1 and 2, wherein the other end of the pocket tightening line forms a slipknot with itself at the handle.

4. The medical access device of claim 1, wherein the pocket cinch wire extends through the first wire slot to the proximal end of the core rod.

5. The medical retrieval device of claim 1, wherein the pocket cinch line extends from the proximal end of the stem through the second slot to the distal end of the stem.

6. The medical extraction device according to any one of claims 1 and 5, wherein the central axis of the axial through hole coincides with the central axis of the core rod.

7. The medical fetching device according to any one of claims 1 and 2, wherein a third line slot is provided on the handle, and the bag mouth tightening line forms a slipknot after passing through the third line slot.

8. The medical fetching device according to claim 2, wherein the core bar assembly comprises a core bar and a fixing unit, and the fixing unit is provided with a first wire groove; a third wire groove is formed in the handle; the central axis of the first wire groove and the central axis of the third wire groove are overlapped.

9. The medical access device of any one of claims 1 and 2, further comprising an outer sheath, wherein the plunger assembly is extendable into the outer sheath, axially movable along the outer sheath, and rotatable within the outer sheath along a central axis of the plunger assembly.

10. The medical fetching device according to any one of claims 1 and 2, wherein a receiving through hole is formed in the wall of the core rod, and the tail end of the bag mouth tightening line is received in the receiving through hole after a slipknot is formed at the other end of the bag mouth tightening line.