CN116473630A - Tensioning detachable snare - Google Patents
Tensioning detachable snare Download PDFInfo
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- CN116473630A CN116473630A CN202310439156.9A CN202310439156A CN116473630A CN 116473630 A CN116473630 A CN 116473630A CN 202310439156 A CN202310439156 A CN 202310439156A CN 116473630 A CN116473630 A CN 116473630A
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- snare
- ferrule
- tightening ring
- hole
- pipe
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- 210000001503 joint Anatomy 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 230000003902 lesion Effects 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 3
- 210000001519 tissue Anatomy 0.000 description 33
- 230000001575 pathological effect Effects 0.000 description 22
- 208000037062 Polyps Diseases 0.000 description 11
- 239000000463 material Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000001574 biopsy Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 210000004400 mucous membrane Anatomy 0.000 description 2
- 229910001000 nickel titanium Inorganic materials 0.000 description 2
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/32056—Surgical snare instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320016—Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgical Instruments (AREA)
Abstract
The invention relates to the technical field of snares, in particular to a tightening detachable snares, which comprises an outer tube, a ferrule, a guy rope and a butt joint pipe group, wherein one end of the ferrule is a snare part, the other end is a connecting part, the area surrounded by the inner peripheral wall of the snare part is a sleeve hole, the butt joint pipe group is provided with a front pipe and a rear pipe which are detachably and fixedly connected with each other, after the sleeve hole in the snare part sleeves diseased tissues, the guy rope is pulled backwards to enable the snare part to enter a tightening ring, the sleeve hole area is reduced to sleeve the diseased tissues, the tightening ring can withdraw from the forceps hole by utilizing the elasticity of the tightening ring, and the outer tube, the guy rope, the rear pipe and the like, so that the forceps hole can be vacated under the condition that the snare is sleeved with the diseased tissues, and other instruments can enter an operation conveniently; meanwhile, due to the detachable design of the butt joint tube group, the snare can be provided with ferrules with various types and specifications, the interchangeability is good, and an operator can select a proper loop head according to the hardness and thickness of a lesion to perform an operation.
Description
Technical Field
The invention relates to the technical field of snares, in particular to a tightening detachable snares.
Background
The snare mainly comprises a ferrule, a guy cable, a handle component and the like, and is matched with the endoscope when in use, and the handle component controls the ferrule through the guy cable so as to cut polyps or other superfluous tissues in the digestive tract;
in actual operation, the loop is inserted into the alimentary canal of the patient through the forceps channel hole of the endoscope, then the operator adjusts the position of the loop through the handle assembly to cover the polyp and resect the polyp, but in actual operation, the current loop device is difficult to successfully resect some thick and hard polyps, and because the forceps channel Kong Youhui of the endoscope is occupied by the loop device during operation, the operator cannot insert other instruments (such as biopsy forceps, injection needles, mucous membrane cutting knives and the like) from the forceps channel hole to cooperate with the loop device under the condition that the polyps are bound by the loop device.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to solve the problem that other instruments cannot be inserted into the forceps hole of the endoscope to be matched with the snare under the condition that the polyp is sleeved by the snare in the prior art, the detachable tightening snare is provided.
The technical scheme adopted for solving the technical problems is as follows: a tensioning detachable snare comprising:
an outer tube;
the device comprises a ferrule, a sleeve and a sleeve, wherein a tightening ring is sleeved outside the ferrule, the front end part of the tightening ring is opposite to the distal end part of the outer tube, one end of the ferrule is a sleeve part positioned outside the front end of the tightening ring, the other end of the ferrule is a connecting part positioned at the rear end of the tightening ring, and a region surrounded by the inner peripheral wall of the sleeve part is a sleeve hole;
the inhaul cable can be arranged in the outer tube in a forward and backward moving way;
the butt joint pipe group is provided with a front pipe and a rear pipe which are detachably and fixedly connected with each other, the front pipe is fixedly connected with the connecting part, and the front end of the inhaul cable is fixedly connected with the rear pipe; when the inhaul cable moves backwards, the butt joint pipe group pulls the ferrule to enable the snare to gradually enter the tightening ring, so that the area of a trepanning hole of the snare is gradually reduced; when the inhaul cable moves forwards, the butt joint pipe group pushes the ferrule to enable the snare portion to gradually withdraw from the tightening ring, so that the area of the trepanning hole of the snare portion gradually becomes larger.
Further, the gripping ring is resilient and arranged such that the ferrule can rest in any position on the path of movement into or out of the gripping ring.
Further, one of the front pipe and the rear pipe is provided with an external thread section, the other is provided with an internal thread section matched with the external thread section, and the external thread section and the internal thread section are in threaded connection.
Further, the external thread section is an external thread section of double-thread, and the internal thread section is an internal thread section of double-thread.
Further, the front pipe and the rear pipe are clamped.
Further, one of the front pipe and the rear pipe is provided with a plug, the other is provided with a jack, and the plug is clamped in the jack;
the plug comprises a thick section and a thin section, wherein the thick section and the thin section are connected with each other, the cross section area of the thin section is smaller than that of the thick section, the jack comprises a large hole and a small hole, the large hole and the small hole are connected with each other, the butt joint pipe group is located at the position where the small hole is located and can elastically deform to allow the thick section to enter or leave the large hole through the small hole, and when the plug is clamped in the jack, the thick section is located in the large hole, and the thin section is located in the small hole.
Further, the ferrule is formed by bending a core wire made of a metal material, a wire is arranged on the core wire, and the wire is spirally wound around the core wire along the length direction of the core wire to form a spiral groove.
Further, the inner peripheral wall of the tightening ring is provided with anti-slip teeth for being embedded into the spiral groove.
Further, the wire is a stainless steel wire.
Further, the material of the tightening ring is TPU polyurethane.
The beneficial effects of the invention are as follows: after the loop of the tightening detachable snare is sleeved on the pathological tissue, the pulling rope is pulled backwards to enable the loop to enter the tightening ring, the area of the loop is reduced to sleeve and tie the pathological tissue, the tightening ring tightly hugs the loop by using the elasticity of the tightening ring, so that when the rear tube is detached from the front tube, the loop is still enabled to tie the pathological tissue, meanwhile, the outer tube, the pulling rope, the rear tube and the like can withdraw from the forceps channel hole, only the loop part, the front tube and the tightening ring of the loop are reserved, and the tightening ring is restrained on the pathological tissue at the moment, so that the forceps channel hole can be vacated under the condition that the loop is sleeved on the pathological tissue, and other instruments can conveniently enter for operation, namely, the snare can realize the two functions of loop ligation and excision of the pathological tissue, and the pathological tissue is excised by the loop under normal conditions; once the ligature assembly is found to be incapable of being successfully resected by the ferrule, the snare is not required to be withdrawn entirely, the ferrule can be reserved in a patient body to keep the ligature function on the pathological tissues, so that the pathological tissues are protruded, the outer tube, the guy cable, the rear tube and the like of the snare are withdrawn to form the free forceps channel holes for other instruments to enter the patient body, the tissues sleeved by the ferrule are protruded, the operator can conveniently and rapidly position the pathological tissues, convenience is provided for the other instruments to resect the pathological tissues, and the operation efficiency is improved; meanwhile, due to the detachable design of the butt joint tube group, the snare can be provided with ferrules with various types and specifications, the interchangeability is good, and an operator can select a proper loop head according to the hardness and thickness of a lesion to perform an operation.
Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the present application, which proceeds with reference to the accompanying drawings.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic view of the tensioning of the detachable snare of the present invention;
FIG. 2 is an enlarged schematic view of a portion of FIG. 1A;
FIG. 3 is a schematic view of the snare portion having a gradually increasing area of the snare hole;
FIG. 4 is a schematic illustration of the female and male thread segments disengaged;
FIG. 5 is a schematic illustration of a plug and jack engaged;
FIG. 6 is a schematic view of the plug and jack disengaged;
FIG. 7 is a schematic illustration of the mating of the crimp ring with the ferrule;
fig. 8 is an enlarged partial schematic view of B in fig. 7.
In the figure: 1. an outer tube;
2. ferrule, 21, snare part, 211, trepanning hole, 22, connecting part, 2a, core wire, 2b, wire, 2c, spiral groove;
3. a tightening ring, 31, anti-slip teeth;
4. a guy cable;
5, butt-joint pipe group, 51, front pipe, 511, internal thread section, 512, jack, 512a, big hole, 512b, small hole, 52, rear pipe, 521, external thread section, 522, plug, 522a, thick section, 522b, thin section;
6. handle assembly, 61, core bar, 62, slip ring.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only those features which are relevant to the invention, and orientation and reference (e.g., up, down, left, right, etc.) may be used solely to aid in the description of the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
As shown in fig. 1-8, a tightening detachable snare comprises an outer tube 1, a ferrule 2, a pull-cord 4, and a docking tube set 5;
the rear end of the outer tube 1 can be connected with a handle assembly 6, and the handle assembly 6 can be specifically a handle assembly 6 on any snare or electric snare in the prior art, and the embodiment is not limited; for example, the handle assembly 6 may include a core bar 61 and a slip ring 62, the rear end of the outer tube 1 is fixedly connected with the front end of the core bar 61, the slip ring 62 is slidably mounted on the core bar 61, and the rear end of the cable 4 is fixedly connected with the slip ring 62;
the ring 2 is sleeved with a tightening ring 3 which is elastically held tightly outside the ring 2, the front end part of the tightening ring 3 is opposite to the distal end part of the outer tube 1, one end of the ring 2 is a ring sleeve part 21 positioned outside the front end of the tightening ring 3, the other end of the ring 2 is a connecting part 22 positioned at the rear end of the tightening ring 3, and the area surrounded by the inner peripheral wall of the ring sleeve part 21 is a sleeve hole 211 for sleeve polyps or other pathological tissues;
the stay rope 4 can be arranged in the outer tube 1 in a back-and-forth moving way; the inhaul cable 4 can be, but is not limited to, a steel wire rope or a synchronous rotating steel wire rope, the synchronous rotating steel wire rope can transmit long-distance load, has higher tensile strength, fatigue resistance and impact toughness, good corrosion resistance and softness, and has good synchronous rotating performance, can transmit rotating force for a long distance, accurately controls the front and back movement of the ferrule 2, and drives the ferrule 2 to rotate, and the problems of operation delay and the like do not occur;
the butt joint pipe group 5 is provided with a front pipe 51 and a rear pipe 52, the front pipe 51 is fixedly connected with the connecting part 22 of the ferrule 2, the front end of the inhaul cable 4 is fixedly connected with the rear pipe 52, and the front pipe 51 is detachably and fixedly connected with the rear pipe 52; as shown in fig. 1, when the cable 4 moves backward, the butt joint tube group 5 pulls the ferrule 2 so that the snare portion 21 gradually enters the tightening ring 3, so that the area of the snare hole 211 of the snare portion 21 gradually becomes smaller; as shown in fig. 3, when the cable 4 moves forward, the butt-joint tube group 5 pushes the ferrule 2 so that the snare portion 21 gradually withdraws from the tightening ring 3, so that the area of the snare hole 211 of the snare portion 21 gradually becomes larger.
After the sleeve taking hole 211 in the sleeve taking part 21 is sleeved with pathological tissues, the pull rope 4 is pulled backwards to enable the sleeve taking part 21 to enter the tightening ring 3, the sleeve taking hole 211 is reduced in area to sleeve and tighten the pathological tissues, as shown in fig. 4, the tightening ring 3 is used for tightly holding the sleeve ring 2 by self elasticity, so that when the rear pipe 52 is detached from the front pipe 51, the sleeve ring 2 is still tightened with pathological tissues, meanwhile, the outer pipe 1, the pull rope 4, the rear pipe 52 and the like can be withdrawn from the forceps hole, only the sleeve part 21, the front pipe 51 and the tightening ring 3 of the sleeve ring 2 are reserved, and at the moment, the tightening ring 3 is restrained on the pathological tissues, so that the forceps hole can be vacated under the condition that the sleeve ring 2 is sleeved with the pathological tissues, and other instruments can enter the operation conveniently; meanwhile, due to the detachable design of the butt joint tube group 5, the snare can be provided with ferrules 2 with various types and specifications, the interchangeability is good, and an operator can select a proper loop head according to the hardness and thickness of a lesion to perform an operation.
In some examples, the tightening ring 3 is elastic and is arranged such that the ferrule 2 can stay in any position on the path of movement into or out of the tightening ring 3; so as to prevent the phenomenon that the ferrule 2 slips off from the pathological tissues caused by forward displacement of the ferrule 2 relative to the tightening ring 3 after the separation of the front tube 51 and the rear tube 52;
the material of the tightening ring 3 can be but not limited to TPU polyurethane, has better hardness, elasticity, tearing strength and tensile strength, preferably, the material of the tightening ring 3 is medical TPU polyurethane, and the outer circumferential surface of the tightening ring 3 is smooth, such as a cylindrical surface; the end surface of the tightening ring 3 is flat, for example, a plane, and an inner hole formed by the inner circumferential surface of the tightening ring 3 and the outer circumferential surface of the tightening ring 3 are coaxially arranged without eccentricity.
Regarding the detachable fixed connection between the front tube 51 and the rear tube 52, the following detachable forms may be employed, but are not limited thereto:
first detachable form: as shown in fig. 2 and 4, one of the front pipe 51 and the rear pipe 52 is provided with an external thread section 521, and the other is provided with an internal thread section 511 matching the external thread section 521, that is, when the external thread section 521 is provided on the front pipe 51, the internal thread section 511 is provided on the rear pipe 52; when the front pipe 51 is provided with the internal thread section 511, the rear pipe 52 is provided with the external thread section 521; the external thread section 521 and the internal thread section 511 are in threaded connection; when the rear pipe 52 is driven to rotate along one direction by the inhaul cable 4, the rear pipe 52 is screwed on the front pipe 51; when the rear pipe 52 is driven to rotate along the other direction by the inhaul cable 4, the rear pipe 52 is gradually far away from the front pipe 51 until the rear pipe is separated from the front pipe 51, and the inhaul cable 4 adopts a synchronous rotating steel wire rope to accurately control the front pipe 51 and the rear pipe 52 to be assembled and disassembled, so that the problems of operation delay and the like are avoided;
the external thread section 521 may also be a double thread external thread section 521, and the corresponding internal thread section 511 is a double thread internal thread section 511; the use of double thread for the external thread segment 521 and the internal thread segment 511 results in a double thread lead than a single thread lead, which allows for quick assembly and disassembly between the front tube 51 and the rear tube 52, and also results in a smoother removal of the rear tube 52 from the front tube 51.
Second detachable form: as shown in fig. 5 and 6, one of the front tube 51 and the rear tube 52 is provided with a plug 522, the other is provided with an insertion hole 512, and the plug 522 is clamped in the insertion hole 512; that is, when the plug 522 is provided to the front pipe 51, the insertion hole 512 is provided to the rear pipe 52; when the jack 512 is arranged on the front pipe 51, the plug 522 is arranged on the rear pipe 52;
taking the jack 512 arranged on the front pipe 51 and the plug 522 arranged on the rear pipe 52 as an example, the plug 522 comprises a thick section 522 and a thin section 522b with a smaller cross section than the thick section 522a, which are connected with each other, the jack 512 comprises a big hole 512a and a small hole 512b with a smaller cross section than the big hole 512a, a step surface is formed between the big hole 512a and the small hole 512b, one end surface of the thick section 522a close to the step surface is in contact with, is abutted against or leaves a gap, the butt joint pipe group 5 is elastically deformed at the position of the small hole 512b so as to allow the thick section 522a to enter or leave the big hole 512a through the small hole 512b, a plurality of gaps are formed at intervals along the circumference of the rear end of the front pipe 51, and the gaps extend from the outer wall of the front pipe 51 to the inner wall of the small hole 512b, so that the thick section 522a can easily elastically deform to enter or leave the small hole 512b;
when the stay rope 4 drives the rear pipe 52 to move forwards, the plug 522 on the thick section 522a forces the front pipe 51 to elastically deform at the position of the small hole 512b until the thick section 522a completely reaches the large hole 512a, and the thin section 522b is correspondingly positioned in the small hole 512b, so that the rear pipe 52 and the front pipe 51 are clamped; when the pull rope 4 drives the rear tube 52 to move backwards, the plug 522 on the thick section 522a moves into the small hole 512b, so that the front tube 51 elastically deforms at the position of the small hole 512b until the front tube leaves the small hole 512b completely, and the rear tube 52 and the front tube 51 are separated.
Third detachable form: the front pipe 51 and the rear pipe 52 are rotationally clamped, the rear pipe 52 is provided with a clamping column, the rear end part of the front pipe 51 is provided with a rotary clamping groove, the rotary clamping groove is provided with an inlet section parallel to the axis of the front pipe 51 and a circumferential section perpendicular to the axis of the front pipe 51, and the inlet section is communicated with the circumferential section;
when in clamping, the clamping column is aligned with the inlet section, then the rear pipe 52 is moved forwards until the clamping column reaches the circumferential section along the inlet section, and then the rear pipe 52 is rotated to drive the clamping column to enter the circumferential section, so that the clamping column is staggered with the inlet section, and further the front pipe 51 and the rear pipe 52 are rotationally clamped; when the rear tube 52 is detached, the rear tube 52 is separated from the front tube 51 by rotating the rear tube 52 first to rotate the clamping posts along the circumferential section to align with the inlet section and then moving the rear tube 52 rearward.
In some examples, as shown in fig. 7 and 8, the ferrule 2 is formed by bending a core wire 2a of a metal material, and a wire 2b is provided on the core wire 2a; the core wire 2a can be made of shape memory alloy, so that the front end of the ferrule 2 can be automatically unfolded after leaving the tightening ring 3; the material of the core wire 2a may specifically be nickel-titanium alloy, for example, a plurality of nickel-titanium wires are woven or twisted to form the core wire 2a; the wire 2b is spirally wound around the core wire 2a along the length direction of the core wire 2a to form a spiral groove 2c; thus, the ferrule 2 has the characteristic of skid resistance, in some existing technologies, some polyps without pedicles, flat and poor in operation position are easy to slip off when snagging is carried out, so that normal operation of operation is affected, inconvenience is brought to medical staff, and some snares are inconvenient to quickly adjust the state of the self, and when a part of polyps is resected, some snares cannot be quickly restored, so that operation efficiency is affected. Therefore, the ferrule 2 with the spiral wound wire 2b can perfectly solve the technical problems, because the spiral wound wire 2b not only can make the ferrule 2 have the anti-slip characteristic when the polyp is sleeved, the sleeve hole 211 in the sleeve portion 21 is beneficial to successfully sleeve some sessile, flat and poor-operative polyps, but also can increase the friction force between the ferrule 2 and the tightening ring 3, reduce or avoid the occurrence of the phenomenon that the ferrule 2 slips off the pathological tissues, and can also improve the restoring force of the ferrule 2, so that the sleeve portion 21 can be quickly restored when leaving the tightening ring 3.
In some examples, the inner peripheral wall of the tightening ring 3 is provided with the anti-slip teeth 31 for being embedded in the spiral groove 2c, the material of the anti-slip teeth 31 is consistent with that of the tightening ring 3, the tightening effect of the tightening ring 3 on the snare portion 21 for ligating human tissues can be greatly increased, loosening of the snare portion 21 after ligating human tissues is avoided, the anti-slip teeth 31 can also be a barb structure gradually inclined towards the axis of the tightening ring 3 from front to back, so as to cause further obstruction to the snare portion 21 moving forwards away from the tightening ring 3, and loosening caused by forward movement of the snare portion 21 after ligating human tissues is avoided; specifically, one end of the anti-slip tooth 31 is a fixed end fixedly connected with or integrally formed with the inner peripheral wall of the winding ring 3, the other end is a free end, and an included angle between a connecting line between the central point of the free end and the central point of the fixed end and the axis of the winding ring 2 is an acute angle, and the range of the acute angle is preferably 10 ° -45 °.
In some examples, the wire 2b is a stainless steel wire with a relatively good elastic capability, which on the one hand can increase the strength of the ferrule 2 and also increase the restoring force of the ferrule 2 and increase the restoring speed of the snare portion 21 when leaving the tightening ring 3.
The above-described tightening of the detachable snare operates as follows:
1) As shown in fig. 1 and 2, before the endoscope is inserted, during the test, the tightening ring 3 is not assembled on the ferrule 2, the handle assembly 6 drives the guy rope 4 to move back and forth, so that the ferrule 2 is pulled into or pushed out of the outer tube 1, the ferrule 2 generates a closing action when being pulled into the outer tube 1, and the ferrule 2 generates a unfolding action when being pushed out of the outer tube 1, so that no adverse condition is confirmed;
2) After the test is completed, as shown in fig. 2, the tightening ring 3 is sleeved from the front end of the ferrule 2, the tightening ring 3 is sleeved on the ferrule 2, at this time, most of the ferrule 2 is positioned at the front end of the tightening ring 3 and is in an unfolding state, then the snare part 21 is pinched by hands to enter a forceps channel hole of an endoscope, after the snare part passes through the forceps channel hole, the snare part 21 is unfolded, particularly, the ferrule made of shape memory alloy has a memory property, and the snare part 21 can be naturally unfolded in a preset state;
3) The movable handle assembly 6 drives the snare part 21 to move to the lesion tissue, the snare part 21 is sleeved on the lesion tissue, the slip ring 62 is operated to tighten the snare 2 at a certain speed, the pull rope 4 pulls the snare 2 to move backwards, and the tightening ring 3 is propped against the outer tube 1 to be kept still in the backward moving process of the snare 2, so that the snare part 21 of the snare 2 gradually enters the tightening ring 3;
4) When the snare portion 21 is tightened, the tightening ring 3 holds the snare 2 tightly so as to prevent the snare portion 21 from loosening after being sleeved on the pathological tissue, and an assistant confirms the hardness and the thickness of the pathological tissue and transmits the hardness and the thickness to an operator;
5) After confirming that the tightening ring 3 is tightened to the collar 2 so that the collar 2 is tightened to the lesion tissue, the handle assembly 6 is rotated and the screwed front tube 51 and rear tube 52 are disconnected from each other as shown in fig. 4 and 6;
6) Withdrawing the outer tube 1, the inhaul cable 4, the rear tube 52 and the like from the forceps channel hole, and reserving the tightening ring 3, the ferrule 2 and the front tube 51, wherein the tightening ring 3 forces the ferrule 2 to be tightened on pathological tissues;
7) At this time, when the lesion tissue is cannulated by the collar 2, a forceps hole is left, and the operator can insert other instruments (for example, biopsy forceps, an injection needle, a mucous membrane incision knife, etc.) from the forceps hole to perform the operation; tissue remaining in the body, the cinch ring 3, the collar 2 and the front tube 51 can be removed with the biopsy forceps, sampling forceps.
It should be noted that the handle assembly 6 may also be provided with a high frequency electrical interface, which may be electrically connected to the ferrule 2 via the front and rear tubes 51, 52, and which may be electrically cut, coagulated, etc. the diseased tissue if electrical cutting is desired.
The above-described preferred embodiments according to the present invention are intended to suggest that, from the above description, various changes and modifications can be made by the worker in question without departing from the technical spirit of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (10)
1. A tensioning detachable snare, characterized by: comprising the following steps:
an outer tube (1);
the device comprises a ferrule (2), a tightening ring (3) which is elastically held tightly outside the ferrule (2) is sleeved on the ferrule, the front end part of the tightening ring (3) is arranged opposite to the distal end part of an outer tube (1), one end of the ferrule (2) is a snare part (21) positioned outside the front end of the tightening ring (3), the other end of the ferrule is a connecting part (22) positioned at the rear end of the tightening ring (3), and a region surrounded by the inner peripheral wall of the snare part (21) is a trepanning hole (211);
a pull rope (4) which can move back and forth and is arranged in the outer tube (1);
the butt joint pipe group (5) is provided with a front pipe (51) and a rear pipe (52) which are detachably and fixedly connected with each other, the front pipe (51) is fixedly connected with the connecting part (22), and the front end of the inhaul cable (4) is fixedly connected with the rear pipe (52); when the inhaul cable (4) moves backwards, the butt joint pipe group (5) pulls the ferrule (2) to enable the snare part (21) to gradually enter the tightening ring (3), so that the area of the snare hole (211) of the snare part (21) is gradually reduced; when the inhaul cable (4) moves forwards, the butt joint pipe group (5) pushes the ferrule (2) to enable the snare portion (21) to gradually withdraw from the tightening ring (3), so that the area of the snare hole (211) of the snare portion (21) is gradually increased.
2. The taut detachable snare according to claim 1, wherein: the tightening ring (3) is elastic and is arranged such that the ferrule (2) can rest in any position on the path of movement into or out of the tightening ring (3).
3. The taut detachable snare according to claim 1, wherein: one of the front pipe (51) and the rear pipe (52) is provided with an external thread section (521), the other is provided with an internal thread section (511) matched with the external thread section (521), and the external thread section (521) and the internal thread section (511) are in threaded connection.
4. A taut detachable snare according to claim 3, wherein: the external thread section (521) is a double thread external thread section (521), and the internal thread section (511) is a double thread internal thread section (511).
5. The taut detachable snare according to claim 1, wherein: the front pipe (51) and the rear pipe (52) are clamped.
6. The taut detachable snare according to claim 5, wherein: one of the front pipe (51) and the rear pipe (52) is provided with a plug (522), the other is provided with an inserting hole (512), and the plug (522) is clamped in the inserting hole (512);
the plug (522) comprises a thick section (522 a) and a thin section (522 b) with a smaller cross-sectional area than the thick section (522 a), wherein the plug (522) comprises a large hole (512 a) and a small hole (512 b) with a smaller cross-sectional area than the large hole (512 a), the butt joint pipe group (5) is positioned at the position of the small hole (512 b) and can elastically deform so as to allow the thick section (522 a) to enter or leave the large hole (512 a) through the small hole (512 b), and when the plug (522) is clamped in the plug (512), the thick section (522 a) is positioned in the large hole (512 a), and the thin section (522 b) is positioned in the small hole (512 b).
7. The taut detachable snare according to claim 1, wherein: the ferrule (2) is formed by bending a core wire (2 a) made of a metal material, a wire (2 b) is arranged on the core wire (2 a), and the wire (2 b) is spirally wound around the core wire (2 a) along the length direction of the core wire (2 a) to form a spiral groove (2 c).
8. The taut detachable snare according to claim 7, wherein: the inner peripheral wall of the tightening ring (3) is provided with anti-slip teeth (31) which are used for being embedded into the spiral groove (2 c).
9. The taut detachable snare according to claim 7, wherein: the wire rod (2 b) is a stainless steel wire.
10. The taut detachable snare according to claim 1, wherein: the tightening ring (3) is made of TPU polyurethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310439156.9A CN116473630A (en) | 2023-04-21 | 2023-04-21 | Tensioning detachable snare |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310439156.9A CN116473630A (en) | 2023-04-21 | 2023-04-21 | Tensioning detachable snare |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116473630A true CN116473630A (en) | 2023-07-25 |
Family
ID=87222660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310439156.9A Pending CN116473630A (en) | 2023-04-21 | 2023-04-21 | Tensioning detachable snare |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116473630A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030139750A1 (en) * | 2001-04-12 | 2003-07-24 | Olympus Optical Co., Ltd. | Treatment device for endoscope |
| CN102913536A (en) * | 2011-08-01 | 2013-02-06 | 舒能（苏州）工业技术有限公司 | Flexible shaft apparatus for medical treatment and application thereof |
| US20140276911A1 (en) * | 2013-03-15 | 2014-09-18 | Boston Scientific Scimed, Inc. | Tissue resection snares |
| CN217853139U (en) * | 2022-02-28 | 2022-11-22 | 宁波新跃医疗科技股份有限公司 | Purse-string suture snare and purse-string suture device |
-
2023
- 2023-04-21 CN CN202310439156.9A patent/CN116473630A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030139750A1 (en) * | 2001-04-12 | 2003-07-24 | Olympus Optical Co., Ltd. | Treatment device for endoscope |
| CN102913536A (en) * | 2011-08-01 | 2013-02-06 | 舒能（苏州）工业技术有限公司 | Flexible shaft apparatus for medical treatment and application thereof |
| US20140276911A1 (en) * | 2013-03-15 | 2014-09-18 | Boston Scientific Scimed, Inc. | Tissue resection snares |
| CN217853139U (en) * | 2022-02-28 | 2022-11-22 | 宁波新跃医疗科技股份有限公司 | Purse-string suture snare and purse-string suture device |
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