CN105852943B - Medical fetching device - Google Patents
Medical fetching device Download PDFInfo
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- CN105852943B CN105852943B CN201610205208.6A CN201610205208A CN105852943B CN 105852943 B CN105852943 B CN 105852943B CN 201610205208 A CN201610205208 A CN 201610205208A CN 105852943 B CN105852943 B CN 105852943B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/50—Instruments, other than pincettes or toothpicks, for removing foreign bodies from the human body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/04—Endoscopic instruments
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/02—Inorganic materials
- A61L31/022—Metals or alloys
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00238—Type of minimally invasive operation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00287—Bags for minimally invasive surgery
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00358—Snares for grasping
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Abstract
The invention discloses a medical fetching device, which comprises: a core bar assembly; a pouch body having an open end and a closed end; the supporting mechanism comprises a front section and a rear section, the front section penetrates through the open end of the bag body, and the front section is in a curve shape and is used for supporting the bag body; the rear section is linear and is used for being fixedly installed with the core rod assembly. The medical fetching device is simple in process, reliable in structure, easy to install and convenient to operate and use; can guarantee that the bag body opens completely when performing the operation, get the thing bag and release the outer tube easily or accomodate in the outer tube, reduce patient's misery, shorten the operation time, improve operation efficiency.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to a medical fetching device.
background
In laparoscopic surgery, how to safely and thoroughly remove surgical excision and residues is always a key point and a difficult point, which is not only directly related to success or failure of the whole laparoscopic surgery, but also related to postoperative rehabilitation of patients. For a long time, the domestic laparoscopic surgery has no medical tool specially for taking out the resection objects, and a hospital for carrying out the laparoscopic surgery can only use homemade gloves or homemade plastic bags to complete the critical step after processing and disinfection. Such homemade gloves or homemade plastic bags are cumbersome in manufacturing steps, and it is difficult to ensure that surgical excision and residues are completely and thoroughly taken out, so that there is a great risk of infection, inconvenience is brought to the surgical operator, and potential risk is also brought to the patient.
Medical load handling device develops to laparoscopic surgery's operation demand specially, can once only take out operation excision thing (like malignant tumor, cystic nature, pustule excision thing and tissues such as endometrium), effectively prevent pathological change tissue and healthy tissue contact, avoid pathology to remain, can not only make things convenient for doctor's operation greatly, reduce the operation degree of difficulty, save the operating time, improve operation efficiency, be favorable to patient's postoperative rehabilitation moreover, reduce patient's postoperative infection risk, save a large amount of recessive treatment expenses for the patient. In the prior art, the supporting mechanism is generally circular or semicircular, the material is generally memory titanium wire or stainless steel, the bag body is not easy to be put into the outer sleeve, the opening of the bag mouth is incomplete, and the operation requirement cannot be met.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a medical fetching device which has reasonable structural design, high strength, reliable structure and easy processing and operation, and the invention is realized by the following technical scheme:
A medical extraction device, comprising: a core bar assembly; a pouch body having an open end and a closed end; the supporting mechanism comprises a front section and a rear section, the front section penetrates through the open end of the bag body, and the front section is in a curve shape and is used for supporting the bag body; the rear section is linear and is used for being fixedly installed with the core bar assembly; the core bar assembly and the support mechanism are respectively provided with a positioning and mounting structure which is matched with each other, the positioning and mounting structures are positioning ribs and positioning grooves, the core bar assembly is provided with at least one positioning rib, and the support mechanism is provided with at least one positioning groove; the positioning ribs are matched and fixed with the positioning grooves, so that the supporting mechanism is fixedly connected with the core bar assembly in a non-rotatable mode.
The supporting mechanism comprises a first supporting frame and a second supporting frame, and the first supporting frame and the second supporting frame are fixedly connected or integrally formed; the front section of the supporting mechanism is a collection of the front section of the first supporting frame and the front section of the second supporting frame, and the rear section of the supporting mechanism is a collection of the rear section of the first supporting frame and the rear section of the second supporting frame.
The front section of the first support frame and the front section of the second support frame both comprise at least two adjacent sections of arcs.
Preferably, the at least two adjacent arcs are both arcs.
The front section of the first support frame and the front section of the second support frame both comprise three sections of circular arcs: a first arc, a second arc and a third arc; the first arc is circumscribed with the second arc, and the second arc is inscribed with the third arc.
the chord of the first arc is positioned on the outer side of the bag body, and the chord of the second arc and the chord of the third arc are positioned on the inner side of the bag body.
The radius of the first circular arc is smaller than that of the second circular arc, and the radius of the second circular arc is smaller than that of the third circular arc.
The supporting mechanism is made of nickel-titanium shape memory alloy.
The nickel-titanium shape memory alloy comprises, by mass, 54% -57% of nickel, not more than 3% of unavoidable impurities, and the balance titanium.
The nickel-titanium shape memory alloy comprises 55% by mass of nickel, 2.2% by mass of inevitable impurities and the balance titanium.
The core bar assembly includes a first securing element and the second securing element that cooperate to secure the support mechanism.
The medical fetching device improves the structure and the material of the fetching bag unfolding device, the supporting mechanism can be easily pushed out of the outer sleeve and also can be easily put into the outer sleeve, the supporting mechanism can restore the original shape or be close to the original shape, the bag opening is completely unfolded, the operation time is shortened, the pain of a patient is reduced, and the operation efficiency is improved.
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 a cross-sectional view of a support mechanism within an outer sleeve according to an embodiment of the present invention with other components omitted for clarity of illustration;
FIG. 5 is a top plan view of the free state of the support mechanism of the medical retrieval device in accordance with an embodiment of the present invention;
FIG. 6 is a perspective view of the support mechanism of the medical retrieval device in a free state in accordance with an embodiment of the present invention;
FIG. 7 is an enlarged view of a portion of the structure of FIG. 6 at A;
FIG. 8 is an exploded view of the plunger assembly of the medical retrieval device in accordance with an embodiment of the present invention;
FIG. 9 is an enlarged view of a portion of the structure at B in FIG. 8;
FIG. 10 is an axial cross-sectional view of a support mechanism in cooperation with a core rod assembly along a first groove according to an embodiment of the present invention with portions omitted for clarity of illustration of assembly;
Fig. 11 is a partial enlarged view of the structure at C in fig. 10.
reference numerals:
the medical fetching device 100, the bag body 1, the supporting mechanism 2, the first supporting frame 21, the second supporting frame 22, the core bar component 3, the first fixing element 31, the second fixing element 32, the outer sleeve 4, the handle 5, the bag mouth tightening line 6, the screw 7 and the handle 8.
Detailed Description
The following describes a medical fetching device 100 according to an embodiment of the present invention with reference to the drawings. Examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The following described embodiments are exemplary and are intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 3, a medical fetching device 100 according to an 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 opening tightening line 6, a screw 7, and a handle 8; the supporting mechanism 2 comprises a first supporting frame 21 and a second supporting frame 22, the core bar assembly 3 comprises a core bar, a first fixing element 31 and a second fixing element 32, and the handle 5 comprises an upper half part 51 and a lower half part 52.
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. 4, before use, the support mechanism 2 is completely received in the outer sleeve 4, and the front section of the support mechanism 2 is constrained by the outer sleeve 4 and is in a stressed and flattened state, the proximal end 211 of the first support 21 abuts against the proximal end 221 of the second support 22, the first support 21 is separated from the rest of the front section of the second support 22, and the distal end of the first support 21 and the distal end of the second support 22 are recombined to form the fixed end 23. The receptacle 1 is flattened, folded from the closed end 12 to the vicinity of the open end 11, and then contracted into the outer sleeve 4 together with the support mechanism.
The rear sections of the first support frame 21 and the second support frame 22 are linear, so that the first support frame and the second support frame are convenient to install and fix on the core rod component 3. As shown in fig. 5, the front sections of the first support frame 21 and the second support frame 22 are curved to support the bag body 1; the front section of the first support frame 21 and the front section of the second support frame 22 both comprise at least two adjacent arc sections. In this embodiment, preferably, at least two adjacent arcs are both arcs. Further, the front section of the first support frame 21 and the front section of the second support frame 22 both include three circular arcs: first circular arcs 214, 224, second circular arcs 213, 223, third circular arcs 212, 222. Preferably, the first arc 214 is circumscribed with the second arc 213, and the second arc 213 is inscribed with the third arc 212; the first arc 224 is circumscribed with the second arc 223, and the second arc 223 is inscribed with the third arc 222, so that the structure of the supporting mechanism 2 is smooth, and the bag body 1 is easy to mount, dismount and completely support. The chords of the first arcs 214 and 224 are located outside the bag body 1, and the chords of the second arcs 213 and 223 and the chords of the third arcs 212 and 222 are located inside the bag body 1. Radius R of first circular arc 214, 2241Smaller than the radius R of said second circular arc 213, 2232Radius R of second circular arc 213, 2232Smaller than the radius R of the third arc 212, 2223。
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 statora 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. The mounting fixed end 23 of the support mechanism 2 is linear, and one end of the first arc 214, 224 is circumscribed with the second arc 213, 223, respectively, and the other end is smoothly connected with the mounting fixed end 23 of the support mechanism 2, so that the first arc 214, 224 smoothly and smoothly connects the distal end of the support mechanism 2 with the second arc 213, 223. Radius R of first circular arc 214, 2241the support mechanism 2 is small and large in bending degree, and the support mechanism 2 can be maximally expanded by a small length on the premise that the support mechanism 2 is smoothly transited from the installation fixing end 23 to the expanded state.
when the medical fetching device 100 is used, the proximal end of the outer sleeve 4 of the medical fetching device 100 enters the abdominal cavity of a patient to a proper position 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 respectively, pushes the core bar component 3 forwards through the handle 8 with the other hand, and correspondingly pushes the supporting mechanism 2 fixedly connected with the core bar component 3 forwards. The proximal end 211 of the first support bracket 21 is slowly spaced from the proximal end 221 of the second support bracket 22. Because the chords of the second arc 213 and 223 and the chords of the third arc 212 and 222 are both located inside the bag body 1, that is, the arc-shaped opening faces the inside of the bag body 1, a bilateral arc is formed, and under the condition that the circumference of the open end 11 of the bag body 1 is constant, the assembly is convenient, and the area formed by the open end 11 of the bag body 1 is large, that is, the opening opened by the open end 11 of the bag body 1 is large. Radius R of third arc 212, 2223Large and small in bending degree, close to a straight line shape, so as to facilitate the support mechanism 2 to penetrate into the non-closed annular channel 111 of the bag body 1; the third arcs 212 and 222 may be linear. Radius R of second circular arc 213, 2232Smaller than the radius R of the third arc 212, 2223The second arcs 213 and 223 are curved to a large extent, and the opening for opening the open end 11 of the bag body 1 is large.
after the front section of the supporting mechanism 2 is pushed out of the outer sleeve 4, the front section of the supporting mechanism 2 is released, the first supporting frame 21 and the second supporting frame 22 automatically recover to the original shape or close to the original shape, the open end 11 of the bag body 1 is expanded, the lap of the bag body 1 is slowly loosened along with the increasing opening of the open end 11 of the bag body 1, and then the bag body 1 is completely unfolded. The open end 11 of the bag body 1 can be completely unfolded to be in an open state without the assistance of additional instruments, so that the specimen can be conveniently obtained.
After the specimen is obtained, the core rod assembly 3 is pulled backwards, because the chord of the first arc 214 and the chord of the first arc 224 are both positioned outside the bag body 1, namely the arc opening faces the outside of the bag body 1, the outer sides of the first arc 214 and the first arc 224 are contacted with the inner side of the outer sleeve 4 and are restrained by the outer sleeve 4, the first arc 214 and the first arc 224 are easily collected in the outer sleeve 4, and then the whole supporting mechanism 2 is easily collected in the outer sleeve.
The material of the supporting mechanism 2 is nickel titanium alloy, preferably, the nickel titanium alloy in this embodiment is nickel titanium shape memory alloy, and particularly, the mass percentage of nickel in the nickel titanium shape memory alloy is 54% to 57%, the mass percentage of inevitable impurities is not more than 3%, and the balance is titanium. The inevitable impurities are one or more of copper, iron, cobalt, chromium, niobium, carbon, nitrogen, hydrogen and oxygen. The nickel in the material of the nickel-titanium shape memory alloy accounts for 54 to 57 percent by mass. The nickel-titanium shape memory alloy has high-efficiency memory function and hyperelasticity, can automatically restore the self plastic deformation to the original shape at a certain specific temperature, can enable the bag body 1 to be in an open state without the assistance of additional instruments, has high strength and corrosion resistance, and can fully meet the application requirements of a medical fetching device. In this embodiment, the nickel-titanium shape memory alloy preferably contains 55% by mass of nickel, 2.2% by mass of unavoidable impurities, and the balance titanium. Preferably, the thickness of the first support frame 21 and the second support frame 22 is 0.5mm, and the width of each of the first support frame and the second support frame is 3 mm.
In the present embodiment, the thickness of the support mechanism 2 is preferably 0.5mm, and correspondingly, the thickness of the positioning slot is 0.5 mm. The mounting and fixing end 23 formed by the superposition of the distal end of the first support frame 21 and the distal end of the second support frame 22 is fixedly mounted in the first groove 315 of the first fixing element 31 of the core rod assembly 3. The distal ends of the first support 21 and the second support 22 may also be offset and spaced apart to be disposed in two recesses of the core assembly 2.
It should be noted that the first support frame 21 and the second support frame 22 of the support mechanism 2 may be integrated, or may be two separately provided components. In addition, three grooves can be respectively arranged on the first fixing element 31 and/or the second fixing element 32, the first support frame 21 and the second support frame 22 are respectively arranged in two grooves of the first fixing element 31 and/or the second fixing element 32, and the other groove is used for forming a channel of the bag mouth tightening line 6. Overlapping means secured to each other or integrally formed.
Because the far end of the bag mouth tightening line 6 is fixed on the mandrel component 3, one end of the bag mouth tightening line 6 penetrates through the unclosed part of the unclosed annular channel 111 and penetrates out of the other unclosed part of the unclosed annular channel 111, a fisherman knot is formed between the unclosed part of the annular channel and the other end of the bag mouth tightening line 6, when the mandrel component 3 is pulled backwards, the bag mouth tightening line 6 is slowly tightened, and the bag mouth tightening line is slowly tightened through the open end 11 of the fisherman knot bag body 1 at the near end.
according to the volume of the specimen or the operation requirement, the doctor can take the medical fetching device 100 and the puncture outfit out of the incision of the abdominal cavity without unfastening the slipknot at the other end of the bag mouth tightening line 6; or the slipknot of the knot is firstly opened, the knot is released, the parts of the medical fetching device 100 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 100 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 blocks or properly flared in the bag body 1.
Referring to fig. 8 to 9, the core rod assembly 3 is further 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: 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 the present embodiment, preferably, two grooves are provided on each of the first fixing element 31 and the second fixing element 32. The first fixing element 31 is provided with a first groove 315 and a second groove 316, and the second fixing element 32 is provided with a third groove 325 and a fourth groove 326. The first groove 315 and the third groove 325 are both linear, and the groove widths of the first groove 315 and the third groove 325 are equal to each other and form a fixing groove of the support mechanism 2; the second groove 316 and the fourth groove 326 are both curved, and the second groove 316 and the fourth groove 326 have the same groove width and together form a channel of the pocket mouth tightening line 6.
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. 6 to 7, the mounting-fixing end 23 of the supporting mechanism 2 is provided with at least one positioning groove. In the present embodiment, the mounting fixing end 23 of the supporting mechanism 2 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 supporting mechanism 2; in the present embodiment, the thickness of the supporting mechanism 2 is preferably 0.5mm, and correspondingly, the thickness of the positioning slot is 0.5 mm. 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 supporting mechanism 2 directly above the positioning groove is small, the strength is weak, and the tensile strength cannot be satisfied (for example, the width of the supporting mechanism 2 is preferably 3mm, and the depths of the first positioning groove 231 and the second positioning groove 232 are both 1.5 mm). 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 fetching device, the cracked risk of location muscle 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 (for example, the length of first constant head tank 231, second constant head tank 232 is 3 mm). As shown in fig. 7, 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 one positioning slot length (for example, 3mm is spaced between the first positioning slot 231 and the second positioning slot 232). The medical fetching device has the advantages of reasonable structural design, high strength, reliable structure, simple process and easy processing and operation.
The supporting mechanism 2 comprises a first supporting frame 21 and a second supporting frame 22, and the orthographic projections of the first supporting frame 21 and the second supporting frame 22 are rectangular. The far end of the first support frame 21 and the far end of the second support frame 22 are combined into an installation fixing end 23, the first support frame 21 and the second support frame 22 are symmetrically arranged along the installation fixing end 23 and the extension line thereof, and the first support frame 21 and the second support frame 22 of the support mechanism 2 can be integrally formed or can be two independently arranged elements. 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. 10 to 11, at least one positioning rib is disposed in the first groove 315 of the first fixing element 31, and in this embodiment, 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. 11, 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 first positioning rib 3151 and the second positioning rib 3152 have sizes and shapes corresponding to the first positioning groove 231 and the second positioning groove 232 of the mounting end 23 of the supporting mechanism 2. Therefore, the mounting and fixing end 23 of the supporting mechanism 2 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 supporting mechanism 2, 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. 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 23 of the supporting mechanism 2 between the two fixing elements, 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. 8, 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 additional mounting fixing end 23 of the supporting mechanism 2, 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. Referring to fig. 8 to 9, 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; alternatively, the first fixing element 31 is provided with mounting posts and mounting holes, and the second fixing element 32 is provided with corresponding mounting holes and mounting posts.
Preferably, in the present embodiment, the first fixing member 31 is provided with a mounting hole, and the second fixing member 32 is provided with a mounting post. In order to facilitate assembly and achieve a better fixing effect, preferably, the number of the mounting holes on the first fixing element 31 is four, correspondingly, the number of the mounting posts on the second fixing element 32 is four, and the four mounting posts correspond to the four mounting holes one by one; the four mounting holes of the first fixing element 31 are identical in size and shape, and the four mounting posts of the second fixing element 32 are identical in size and shape.
The four mounting holes on one end of the first fixing element 31 of the core rod assembly 3 are connected with the four mounting columns on the second fixing element 32 in an interference fit or transition fit mode. The four mounting holes on the first fixing element 31 are identical in size and shape, the four mounting columns on the second fixing element 32 are identical in size and shape, and the upper limit size of each mounting hole is smaller than or equal to the lower limit size of each mounting column, namely, the mounting holes are in interference fit; 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, the third mounting hole 313 and the third mounting post 323, and the fourth mounting hole 314 and the fourth mounting post 324 are matched in a one-to-one correspondence manner.
Preferably, the cross sections of the first mounting post 321, the second mounting post 322, the third mounting post 323 and the fourth mounting post 324 are all circular, and the cross sections of the first mounting hole 311, the second mounting hole 312, the third mounting hole 313 and the fourth mounting hole 314 are all 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 interference magnitude, the assembly can be carried out manually at normal temperature without other tools, and the assembly process is simple and convenient to assemble.
the four mounting holes are distributed on the first fixing element 31 in a substantially T shape, that is, the third mounting hole 313 and the fourth mounting hole 314 are arranged on the first fixing element 31 along the axial direction, the first mounting hole 311 and the second mounting hole 312 are respectively located at two sides of the second groove 316, and the central connecting line of the first mounting hole 311 and the second mounting hole 312 is perpendicular to the central connecting line of the third mounting hole 313 and the fourth mounting hole 314; correspondingly, the four mounting posts are distributed on the second fixing element 32 in a substantially "T" shape, that is, the third mounting post 323 and the fourth mounting post 324 are arranged on the second fixing element 32 along the axial direction, the first mounting post 321 and the second mounting post 322 are respectively located at two sides of the fourth groove 326, and the central connecting line of the first mounting post 321 and the second mounting post 322 is perpendicular to the central connecting line of the third mounting post 323 and the fourth mounting post 324. Thus, the interference fit or transition fit of the first mounting hole 311 and the first mounting post 321, and the interference fit or transition fit of the second mounting hole 312 and the second mounting post 322 can effectively prevent the second fixing element 32 from moving on the first fixing element 31 along the radial direction of the core rod assembly; the interference fit or transition fit of the third mounting hole 313 and the third mounting post 323 and the interference fit or transition fit of the fourth mounting hole 314 and the fourth mounting post 324 can effectively prevent the second fixing element 32 from moving on the first fixing element 31 along the axial direction of the core rod assembly, so as to effectively extrude and fix the mounting fixed end 23 of the supporting mechanism 2, and further fix the supporting mechanism 2, and the best fixing effect is achieved by the number of the mounting posts and the mounting holes.
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 mandrel assembly 3 extends into and is located within the outer sleeve 4 and is axially movable within the outer sleeve 4. The other end of the core bar is provided with a handle 8, and the handle 8 is fixedly connected on the core bar through a screw 7. Two first 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 and is provided with a left annular hole and a right annular hole. The handle 5 is divided into an upper half 51 and a lower half 52. The upper half part 51 and the lower half part 52 are provided with first positioning columns, and the first positioning column of the lower half part 52 and the first positioning column of the upper half part 51 are inserted into the positioning hole of the outer sleeve 4 to be matched and connected, so that the outer sleeve 4 is fixed between the lower half part 52 and the upper half part 51. The lower half 52 further has a second positioning column, the upper half 51 has a second positioning hole, and the second positioning column of the lower half 52 is inserted into the second positioning hole of the upper half 51 and connected in an interference fit manner. 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.
in this embodiment, before use, the support mechanism 2 of the medical device 100 is in a flattened state, the bag body 1 is folded and contracted from the closed end 12 to the vicinity of the open end 11, and the support mechanism 2, the bag body 1, the bag mouth tightening wire 6 and a part of the stem assembly are accommodated in the outer tube 4. When the medical fetching device 100 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, places a thumb and a forefinger into the left annular hole and the right annular hole respectively, and pushes the core rod assembly 3 forwards through the handle 8 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.
An observation instrument or an endoscope is placed in the abdominal cavity of the patient in advance, and a doctor can recognize and cut off the specimen by observing the display, and then obtains the specimen by using the medical fetching device 100, wherein 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 hole respectively thumb and forefinger, and another hand pulls core bar subassembly 3 backward through handle 8, and the installation stiff end 23 of supporting mechanism 2 is earlier taken in outer tube 4, and the curvilinear figure structure of supporting mechanism 2 is level and smooth, can be taken in easily in outer tube 4, 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 supporting mechanism 2 and the two positioning ribs in the groove 315 of the first fixing element 31: the first positioning rib 3151 and the second positioning rib 3152 are fixed in a matching manner, and the mounting hole formed in the first fixing element 31 is in interference fit or transition fit with the mounting post formed in the second fixing element 32, so that the structure is reliable, and the support mechanism 2 cannot be separated from the core rod assembly 3.
According to the volume of the specimen or the operation requirement, the doctor can take the medical fetching device 100 and the puncture outfit out of the incision of the abdominal cavity without unfastening the slipknot at the other end of the bag mouth tightening line 6; or the slipknot of the knot is firstly opened, the knot is released, the parts of the medical fetching device 100 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 100 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 blocks or properly flared in the bag body 1.
In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "proximal", "distal", "inner", "outer", "axial", "radial", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. The terms "first", "second", "third" and "fourth" 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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," "engaged," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. 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 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 (11)
1. A medical fetching device is characterized by comprising:
A core bar assembly;
A pouch body having an open end and a closed end;
The supporting mechanism comprises a front section and a rear section, the front section penetrates through the open end of the bag body, and the front section is in a curve shape and is used for supporting the bag body; the rear section is linear and is used for being fixedly installed with the core bar assembly; the first fixing element and the second fixing element of the core rod assembly are in interference fit or transition fit to extrude and fix the supporting mechanism between the first fixing element and the second fixing element, and the positioning rib in the groove of the first fixing element is matched and fixed with the positioning groove of the supporting mechanism; the positioning ribs correspond to the positioning grooves one to one, and the supporting mechanism is fixedly connected with the core bar assembly in a non-rotatable mode.
2. The medical fetching device according to claim 1, wherein the supporting mechanism comprises a first supporting frame and a second supporting frame, the first supporting frame and the second supporting frame are fixedly connected or integrally formed; the front section of the supporting mechanism is a collection of the front section of the first supporting frame and the front section of the second supporting frame, and the rear section of the supporting mechanism is a collection of the rear section of the first supporting frame and the rear section of the second supporting frame.
3. the medical extraction device of claim 2, wherein the anterior segment of the first support frame and the anterior segment of the second support frame each comprise at least two adjacent arcs.
4. The medical extraction device of claim 3, wherein the at least two adjacent arcs are arcs of a circle.
5. The medical extraction device of claim 4, wherein the anterior segment of the first support frame and the anterior segment of the second support frame each comprise three arcs: a first arc, a second arc and a third arc; the first arc is circumscribed with the second arc, and the second arc is inscribed with the third arc.
6. The medical fetching device according to claim 5, wherein the chord of the first arc is located outside the bag body, and the chord of the second arc and the chord of the third arc are located inside the bag body.
7. The medical extraction device of claim 5, wherein the radius of the first circular arc is smaller than the radius of the second circular arc, and the radius of the second circular arc is smaller than the radius of the third circular arc.
8. The medical fetching device of claim 1, wherein the supporting mechanism is made of a shape memory nickel titanium alloy.
9. the medical fetching device of claim 8, wherein the nickel-titanium shape memory alloy comprises 54-57% by mass of nickel, not more than 3% by mass of unavoidable impurities, and the balance titanium.
10. the medical fetching device of claim 9, wherein the mass percentage of nickel in the nickel titanium shape memory alloy is 55%, the mass percentage of the inevitable impurities is 2.2%, and the balance is titanium.
11. The medical extraction device of claim 1, wherein the core assembly comprises a first fixation element and a second fixation element that cooperate to secure the support mechanism.
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| CN201610205208.6A CN105852943B (en) | 2016-04-05 | 2016-04-05 | Medical fetching device |
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| CN201610205208.6A CN105852943B (en) | 2016-04-05 | 2016-04-05 | Medical fetching device |
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| CN105852943A CN105852943A (en) | 2016-08-17 |
| CN105852943B true CN105852943B (en) | 2019-12-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102327134A (en) * | 2010-07-13 | 2012-01-25 | 周星 | Novel endoscope object taking bag and delivery system |
| CN204181656U (en) * | 2014-09-15 | 2015-03-04 | 北华大学 | The disposable gastroscope biopsy forceps improved |
| EP2962644A1 (en) * | 2014-06-30 | 2016-01-06 | BioScopeX ApS | Endoscopic biopsy instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE50203357D1 (en) * | 2002-09-14 | 2005-07-14 | Storz Karl Gmbh & Co Kg | Endoscopic instrument with removable tool head |
| US20080269774A1 (en) * | 2006-10-26 | 2008-10-30 | Chestnut Medical Technologies, Inc. | Intracorporeal Grasping Device |
| US8734464B2 (en) * | 2011-01-06 | 2014-05-27 | Covidien Lp | Surgical retrieval apparatus for thoracic procedures |
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2016
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102327134A (en) * | 2010-07-13 | 2012-01-25 | 周星 | Novel endoscope object taking bag and delivery system |
| EP2962644A1 (en) * | 2014-06-30 | 2016-01-06 | BioScopeX ApS | Endoscopic biopsy instrument |
| CN204181656U (en) * | 2014-09-15 | 2015-03-04 | 北华大学 | The disposable gastroscope biopsy forceps improved |
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Address after: Dongsheng Road, Jiangyin city 214437 Jiangsu city of Wuxi province No. 6 D3 Applicant after: Jiangsu wind and medical equipment Limited by Share Ltd Address before: Dongsheng Road, Jiangyin city 214437 Jiangsu city of Wuxi province No. 6 D3 Applicant before: Jiangsu wind and medical equipment Co., Ltd |
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