A kind of can the induction system of singlehanded accurately releasing bracket
Technical field
The present invention relates to Micro trauma interventional medical device, particularly relate to a kind of induction system for carrying out singlehanded accurately releasing bracket in lower limb vascular inner disease foci part.
Background technology
Lower limb vascular disease, its sickness rate has obvious rising in recent years, common as arteriosclerosis obliterans, arteriovenous thrombosis, aneurysm etc.; The blood pressure lowering of arterial obliterans of lower extremity internal medicine, blood fat reducing, the treatment such as antiplatelet aggregation only can delay the course advancement of lower extremities obturation, fundamentally can not eliminate the narrow, inaccessible of arterial obliterans of lower extremity blood vessel.Arterial obliterans of lower extremity surgery vascular Endarterectomy, artificial vessel replacement, Bypass rebuilt operation wound be large, have a big risk, and is especially unwell to the patient that arterial obliterans of lower extremity merges severe cardiac cerebrovascular disease, diabetes.Arterial obliterans of lower extremity Endovascular interventional treatment have Wicresoft, simple to operate, determined curative effect, can the advantage of repetitive operation, be the developing direction of diagnosis and treatment vascular conditions.
Peripheral blood vessel has very high disability rate, and professional treatment technology is just among flourish; At present through percutaneous balloon angioplasty and endovascular stent implantation will be primary treatment Ink vessel transfusing disease means.
After percutaneous balloon angioplasty expansion, the incidence rate of restenosis is higher, and average originating rate is about 30%.Restenosis to mostly occur after PTA within several months to 1 year.Main cause is the result of balloon expandable position inner membrance fibroblast proliferation.The mechanism of expansion shows, plasty is a kind of mechanotherapy method of injured blood vessel wall composition, postoperatively a series of reparation will inevitably be caused to react, and this just becomes the pathologic basis of restenosis. therefore the final result of balloon expandable has duality.Interior, middle film limitation tears the expansion causing lumen of vessels, and blood perfusion is recovered; Interior, middle film tears the reason also becoming proliferation of fibrous tissue and cause restenosis simultaneously.Therefore foley's tube is used for the predilation of Stent present stage.
Self-expansion type support is a kind of support using more general arterial obliterans of lower extremity in recent years, have flexible, by the pathological changes compared with distortion, the good and not easily advantage such as displacement of adherent property, tortuous, the long section pathological changes of easy pressurized, blood vessel is suitable.Winding-type self-expanding stent is a kind of newer arterial obliterans of lower extremity periphery support, has desirable pliability, coverage and support force, and suitable especially arterial obliterans of lower extremity discharges at joint part.
When cut self-expandable stent discharges in vivo, once release, can not reclaim, winding-type self-expanding stent has larger axial shrinkage rate, therefore accurately location cause close important, as inaccurate in located, support may not cover lesion completely, causes the complications such as restenosis.
Chinese patent 201410797899.4 discloses a kind of stent delivery system, comprising: handle, connecting device, far-end outer tube, safety lock and axis, and described handle, connecting device are connected successively with far-end outer tube; Wherein, in the tube chamber that described axis is arranged on described far-end outer tube and described connecting device and through in described handle, and described axis is used for fixed support overlay film frame; Described handle comprises fixed handle and rotary handle, and described fixed handle is socketed in the front end with described rotary handle, and described rotary handle rotates relative to described fixed handle, and drives described connecting device and described far-end outer tube to move; Described safety lock connects described fixed handle.The stent delivery system that above-mentioned patent relates to, complex structure, operation inconvenience, and do not solve the problem that accurately discharges of support completely.
Summary of the invention
In order to solve the problems referred to above of prior art, the object of this invention is to provide the induction system of the accurate releasing bracket of a kind of one hand, there is support release accurately, the features such as structure is simple, easy to operate.
To achieve these goals, the technical solution adopted in the present invention is:
Can the induction system of singlehanded accurately releasing bracket, by outer tube, interior pipe, push rod and release lever, described release lever comprises slide block, slide bar, front buckle, rear buckle, handle, quick release button, runner, spring, female Luer, state outer tube to be connected with slide block, described push rod is connected with female Luer with interior pipe respectively, outer tube sleeve is outside interior pipe, described slide bar is indent semilune, two slide bar composition hollow structures, described front buckle and rear buckle are fixed the far-end of slide bar and near-end respectively, described female Luer is fixed on rear buckle, described slide block is embedded in slide bar hollow structure, described slide bar outer surface is provided with helicitic texture, described quick release button and runner composition rotating wheel mechanisms that, be placed on slide bar, when rotating wheel mechanisms that rotates, slide block drives outer tube and interior pipe to make relative motion in slide bar, release can be released by being loaded into interior support, can be had free passage in described interior pipe the godet system of 0.014 inch, 0.018 inch and 0.035 inch.
Further, the screw thread of slide bar of the present invention is double thread, and thread segment is trapezium structure, and trapezoidal hypotenuse is towards the far-end of induction system, and right-angle side is towards the near-end of induction system.
Further, quick release button of the present invention is provided with U-shaped helicitic texture, is engaged mutually with the helicitic texture of described slide bar.
Further, quick release button of the present invention is provided with a pair spring, and in its natural state, when described spring flicks, the screw thread of quick release button is engaged mutually with the helicitic texture of slide bar; When pressing quick release button, described spring closes, and the screw thread of quick release button and the helicitic texture of slide bar depart from, and realize handle and move forward and backward fast.
Further, slide block of the present invention is T-type structure, and two cantilevers are exposed at outside described slide bar.
Further, two vital QI flowing in the body against the natural law are provided with, i.e. slide block layout and button layout, the in-built quick release button of button layout in runner of the present invention, two cantilevers of the in-built slide block of slide block layout, described runner can circle along slide block cantilever and be with movable slider to move axially.
Further, slide bar of the present invention is provided with length scales, signable go out the distance of described release lever movement.
Further, outer tube of the present invention is a metal knitted reinforced pipe, comprises internal layer, metal knitted enhancement Layer and skin, and the braiding node of per inch is 40 ~ 100, and weaving manner is bifilar braiding or single weave.
Further, interior Guan Weiyi root metal of the present invention adds braiding and strengthens polyimide tube, and the braiding node of per inch is 40 ~ 100, and weaving manner is bifilar braiding or single weave.
Further, safe locking device is provided with in release lever of the present invention.
The invention has the beneficial effects as follows: stent delivery system arrives vascular lesion position, one hand holds handle, refer to and forefinger slow circumvolve runner with mother, support is slowly released in induction system, another hands can carry out radiography simultaneously, observe the positioning scenarios of support, simultaneously, sheath pipe has good mechanics and transmits performance, support is released to vascular change at lower extremities position, can accurate Co ntrolled release position, reduce and that the bring probability of vascular restenosis inaccurate due to support release, the present invention also has the advantages such as structure is simple, easy to operate in addition.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the partial cutaway schematic of runner and slide block.
Fig. 3 is rotating wheel mechanisms that schematic diagram.
Fig. 4 is quick release button schematic diagram.
Fig. 5 is the assembling schematic diagram of slide block and runner.
1. outer tube, 2. stress convergent divergent channel, buckle 3., 4. quick release button, 5. runner, 6. handle, 7. slide bar scale, 8. slide bar, 9. buckle, 10. female Luer after, 11. safety locks, pipe in 12., 13. push rods, 14. slide bar thread segment hypotenuses, 15. slide bar thread segment right-angle sides, the screw thread of 16. slide bars, 17. springs, the U-shaped screw thread of 18. quick release button, the cantilever of 19. quick release button, 20. slide block layouts, 21. slide blocks, 22. button layouts.
Detailed description of the invention
Referring now to accompanying drawing, the invention will be further described.
Can the induction system of singlehanded accurately releasing bracket, by outer tube 2, interior pipe 12, push rod 13 and release lever; Release lever comprises slide block 21, slide bar 8, front buckle 3, rear buckle 9, handle 6, quick release button 4, runner 5, spring 17, female Luer 10.Described outer tube 1 is connected with slide block 21, push rod 13 is connected with female Luer 10 with interior pipe 12 respectively, outer tube 1 is enclosed within outside interior pipe 12, slide bar 8 is indent semilune, two slide bar composition hollow structures, front buckle 3 and rear buckle 9 are fixed the far-end of slide bar 8 and near-end respectively, and female Luer 10 is fixed on rear buckle 9, and slide block 21 is embedded in slide bar 8 hollow structure.
Slide bar 8 outer surface is provided with helicitic texture 14, and the screw thread 14 of slide bar is double thread, and thread segment is trapezium structure, and trapezoidal hypotenuse 14 is towards the far-end of induction system, and trapezoidal right-angle side 15 is towards the near-end of induction system.Quick release button 4 is provided with U-shaped helicitic texture 18, the cross section of screw thread 18 is trapezium structure, can be engaged mutually with the helicitic texture 14 of slide bar, trapezoidal thread can ensure that top button 4 and slide bar 8 are when being engaged, even if handle 6 is when by unnecessary external force, also proximally can only move, and can not distally move, thus ensure the safety of patient.
As Fig. 4,2 quick release button and 2 springs 17 are installed in opposite directions, and in its natural state, spring bullet 17 is opened, and the screw thread 18 of quick release button is engaged mutually with the helicitic texture 14 of slide bar; When pressing quick release button 4, spring 17 closes, and the screw thread 18 of quick release button departs from the helicitic texture 14 of slide bar, realizes handle 6 and moves forward and backward fast
Slide block 21 is T-type structure, and two cantilevers are exposed at outside described slide bar 8.Be provided with two vital QI flowing in the body against the natural law in runner 5, i.e. slide block layout 20 and button layout 22, the in-built quick release button 4 of button layout 22, two cantilevers 19 of the in-built slide block of slide block layout 20, runner 5 can circle along slide block cantilever 19 and be with movable slider 21 to move axially.
Outer tube 1 is a metal knitted reinforced pipe, comprises internal layer, metal knitted enhancement Layer and skin; Metal knitted enhancement Layer width wiry is 0.04mm ~ 0.08mm, and thick is 0.02mm ~ 0.04mm, and the braiding node of per inch is 40 ~ 100, and weaving manner is bifilar braiding or single weave; Interior pipe 12 is that a metal adds braiding reinforcement polyimide tube, and the braiding node of per inch is 40 ~ 100, and weaving manner is bifilar braiding or single weave.Braided tube has good mechanotransduction as outer tube and interior pipe, quick release button 4 and runner 5 form rotating wheel mechanisms that, are placed on slide bar 8, when rotating wheel mechanisms that rotates, slide block 21 drives outer tube 1 and interior pipe 2 to make relative motion in slide bar 8, can release release by being loaded into interior support; Slide bar 8 is provided with length scales, signable go out the distance of release lever movement.Be provided with safe locking device in handle, can protect induction system in other non-usage environment such as transport, cause because handle moves support to be released and damage.
Can be had free passage in this induction system the godet system of 0.014 inch, 0.018 inch and 0.035 inch.
Referring to Fig. 1, clinical detailed description of the invention of the present invention is described.The situation of preoperative first radiography assess lesion blood vessel, select the mounting system of suitable dimension, catheter sheath, selects suitable position puncture vessel, seal wire is inserted diseased region by catheter sheath, carry out radiography, to observe diseased region; Reinsert seal wire again after completing radiography, induction system arrives diseased region along seal wire, and one hand holds handle 6, refer to and forefinger slow circumvolve runner 5 with mother, support is slowly released in induction system, and another hands can carry out radiography simultaneously, observes the positioning scenarios of support, after support is located completely, pin quick release button, fixed slip bar, backward Quick-return handle, support is discharged completely, then induction system is withdrawn from external.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.