A kind of medical rotatable snareTechnical field
The present invention relates to area of medical devices, particularly a kind of medical rotatable snare.
Background technology
Snare, is widely used in cutting and captures and reclaim polyp sample and foreign matter, product can be used in people orIn the celioscopy of animal, it is only necessary to can just be worked by a small opening, the excision of conventional gastrointestinal polyps,It is exactly, by endoscopic forceps channel, first to entangle polyp with snare, tighten up, then by polypectomy, typically high-frequency electrical is used during cutting,Polyp tissue is stripped out, then reclaimed the polyp tissue of excision with the string bag, can also use snare directly by polyp setFirmly taken out of in vitro with scope.
In the snare course of work, snare can will very easily pass through endoscopic forceps channel, and current most products areThis point can be accomplished, snare, first close to polyp tissue, then stretches lasso when extracting target polyp tissue in pipelineOut and open, then slowly entangle polyp, but can not be rotated, in some cases, it is more difficult to take out polyp.
The content of the invention
Goal of the invention：The technical problems to be solved by the invention be in view of the shortcomings of the prior art there is provided one kind it is medical canRotate snare.
In order to solve the above-mentioned technical problem, the invention provides the medical rotatable snare of one kind, including be sequentially connectedKnob is socketed with outside lasso, drag-line and boost tube, boost tube, knob drives boost tube to rotate.
In the present invention, including boost tube gear, the center for being arranged on boost tube gear that boost tube is fixed, knob passes through toothWheel transmission drives boost tube rotation.
In the present invention, internal gear is provided with the knob, travelling gear, knob are provided between internal gear and boost tube gearInternal gear is driven, drives boost tube to rotate after band nutating gear, boost tube gear successively, boost tube drives lasso by drag-lineRotate.
In the present invention, the boost tube is externally provided with outer tube, and near-end outer tube wall is provided with the outer tube being adapted to travelling gearGroove, travelling gear is located at outer tube groove, and travelling gear is toward internal messing ejector sleeve gear, toward external toothing internal gear.
In the present invention, the boost tube gear is externally provided with pinion stand, for boost tube gear position limiting.
In the present invention, the knob inner ring is provided with more than one groove, and internal gear outer ring is provided with more than one and grooveProjection on the projection of adaptation, internal gear is inserted into the groove on knob.
In the present invention, the boost tube near-end connects core bar, and core bar is externally provided with sliding block, and the sliding block is distally connected to transmissionBand, drag-line outer ring is provided with outer tube, and outer tube is connected to conveyer belt, and sliding block is mobile to distal end, and boost tube drives drag-line and lasso to remoteEnd movement, sliding block drives outer tube to move proximally to by conveyer belt simultaneously, discharges lasso trick.
In the present invention, electrodes base is provided with the sliding block, electrodes base is provided with the electrode contact and spring of electrical connection,Lower spring end is electrically connected to boost tube.
In the present invention, the outer tube is provided with outer tube fixing pipe, and outer tube fixing pipe is connected to conveyer belt.
In the present invention, the boost tube is adapted to boost tube gear, and boost tube pinion rotation drives boost tube to rotate.
Beneficial effect：The present invention increases rotatable knob on handle, upon rotation of the knob, and knob drives drag-line to turnDynamic, drag-line drives lasso or other apparatuses to rotate together, and such lasso can just follow knob to rotate together, so as to reach regulationThe direction purpose of lasso, the design would be even more beneficial to user's operation, and the more user-friendly product is extracted and cut backReceive foreign matter.
Brief description of the drawings
The present invention is done with reference to the accompanying drawings and detailed description and further illustrated, it is of the invention above-mentioned orOtherwise advantage will become apparent.
Fig. 1 is example structure schematic diagram；
Fig. 2 is snare front view；
Fig. 3 is knob schematic internal view；
Fig. 4 is transmission belt schematic diagram；
Fig. 5 is Fig. 4 partial enlarged drawings；
Fig. 6 is electrode connecting portion point schematic diagram；
Fig. 7 is Fig. 6 partial enlarged drawings.
Embodiment
The present invention is elaborated below in conjunction with accompanying drawing.
Embodiment：
Such as Fig. 1-3, including, core bar 1, sliding block 2, knob 3, boost tube 4, taper knob 5, outer tube 6, lasso 7, internal gear 13,Internal gear 13 is provided with travelling gear 14 and boost tube gear 15, knob, the outer ring of boost tube 4 is provided with boost tube gear 15, internal toothTravelling gear 14 is provided between wheel 13 and boost tube gear 15, knob drives internal gear 13, successively band nutating gear 14, boostingBoost tube is driven to rotate after pipe gear 15, boost tube drives lasso 7 to rotate.
Boost tube is externally provided with outer tube 6, and near-end outer tube wall is provided with the outer tube groove 19 being adapted to travelling gear, driving cogWheel is located at outer tube groove, and travelling gear is toward internal messing ejector sleeve gear 15, toward external toothing internal gear 13.
Boost tube gear 15 is externally provided with pinion stand 20, for spacing to boost tube gear 15.
The inner ring of knob 3 be provided with more than one groove 21, the outer ring of internal gear 13 provided with more than one be adapted to groove it is convexThe projection risen on 22, internal gear 13 is inserted into the groove on knob 3.
Such as Fig. 4 and Fig. 5, including transmission belt fixed block 9, conveyer belt 10, outer tube fixing pipe 11 and drag-line 12, transmission belt is fixedConveyer belt is fixed on sliding block and outer tube by block 9 and outer tube fixing pipe 11, boost tube near-end connection core bar 1, and core bar is externally provided withSliding block 2, the sliding block is distally connected to conveyer belt, and drag-line 12 is provided with outer tube, and outer tube is connected to conveyer belt, and sliding block is moved to distal endDynamic, boost tube drives lasso mobile to distal end, and sliding block drives outer tube to move proximally to by conveyer belt simultaneously, discharges fasterDrag-line 12；
It is specifically that core bar is motionless such as Fig. 4, sliding block 2 downwards, drives boosting bar 4 downwards, sliding block drives conveyer belt simultaneouslyAlong counterclockwise movement, conveyer belt drives outer tube sleeve and outer tube to move upwardly together, so as to realize that a positive and a negative is moved so that reachIncrease the effect of move distance, i.e., the distance of final workpiece motion s is 2 times of slide block movement distance, accelerate release drag-line 12.
Such as Fig. 6 and Fig. 7, including electrode contact 16, spring 17 and electrodes base 18, sliding block is interior to be provided with electrodes base 18, electricityElectrode contact 16 and spring 17 of the pole base 18 provided with electrical connection, the lower end of spring 17 is electrically connected to boost tube.
Embodiment：
After lasso 7 is made, then with drag-line 12 using connecting tube riveting or laser welding, drag-line uses multiply alloy-steel wireOr sub-thread titanium-nickel wire is constituted, the material has very strong toughness and rigidity, workpiece can be driven to rotate.Drag-line passes through outer tube 6,It is fixed up in near-end with boost tube 4, boost tube 4 with knob 3 on the same axis, fix in the vertical with knob 3 by boost tube 4Together, moved together on longitudinal direction, the driving boost tube 4 of knob 3 rotates in the axial direction, comprising an internal gear 13 in knob, helpsA boost tube gear 15 is welded on ejector sleeve, gear material can be metal or Plastic material, and optionally, boost tube can beIt is circular or square or other are special-shaped, to ensure that gear can drive boost tube to rotate, boost tube gear 15 and interiorThere is a travelling gear 14 between gear 13, main function is between filling up between interior boost tube gear 15 and internal gear 13Gap, after assembling, turn knob, you can to drive boost tube to rotate drives workpiece rotation adjustment direction, facilitates hand therewithArt is operated.
Knob is assemblied on sliding block, and knob can be moved forward and backward, due to helping around sliding block axial-rotation with sliding blockEjector sleeve is synchronous with knob in the vertical, so sliding block is moved forward and backward, drives knob to move forward and backward, and knob is transported before and after driving boost tubeIt is dynamic, reach release and reclaim the function of lasso.
There are a through hole, boost tube on electrode contact 16 equipped with connection high-frequency electrical on sliding block, the base 18 of electrode contactThrough through hole, there is a spring 17 to be pressed on boost tube inside electrode tip holder, by the pressure of spring, it is ensured that electrode and boostingElectrically connected between pipe reliable.
There is a conveyer belt 10 in the distal end of handle, sliding block extends anteriorly out a part, and is connected with the outside of conveyer belt 10,Outer tube, is fixed together by conveyer belt opposite side by outer tube fixing pipe 10 with conveyer belt, so, when sliding block is pushed,Sliding block push boost tube workpiece is travelled forward while, sliding block simultaneously push transmission belt rotate, conveyer belt drive outer tube toThe opposite direction motion of sliding block, so, a positive and a negative makes the distance that apparatus stretches out add one than the distance of handle slide block movementTimes, i.e. the motion of handle promotes the motion amplification of workpiece to be 2 times, makes original long stroke need the apparatus of bimanualness to becomeOne-handed performance becomes possible to.
The boost tube of the present invention, can use six deformations, or other shape changeables, be not limited to cylinder.
Application method：
Ring product used in the handle of the present invention, by the pincers road of scope, reaches polyp tissue position, then by movingSliding block on fixed handle, lasso is opened, turning knob adjustment direction, is then extracted or grasping tissue, after tissue is packaged, slowlySlow recession sliding block, lasso is slowly drawn in, can thus be entangled tissue, is then electrified to cut down polyp tissue.
The working portion that the present embodiment is provided is a kind of medical snare or stone extraction basket, and the foreign matter string bag etc. is neededWant the medical equipment of long stroke and rotation.
The invention provides a kind of medical snare, the method and approach for implementing the technical scheme are a lot, above instituteState only is the preferred embodiment of the present invention, it is noted that for those skilled in the art, is not being departed fromOn the premise of the principle of the invention, some improvements and modifications can also be made, these improvements and modifications also should be regarded as the guarantor of the present inventionProtect scope.Each part being not known in the present embodiment can use prior art to be realized.