A kind of ureteral calculi plugging deviceTechnical field
The present invention relates to a kind of ureteral calculi plugging devices, belong to the field of medical instrument technology.
Background technology
Epimere calculus is more typical stone in urinary system in ureter, defeated with the development of hysteroscope minimal invasive techniques and instrumentRubble has become the important means for the treatment of proximal ureteral calculus under urinary catheter mirror.But due to the pressure of ureter cavity flushing in artCause calculus to move up with the impact force of laser lithotripsy, fall to renal plevis, stone debris residue problem, tends not to reach expected effectFruit.
Calculus stop place is higher, and the probability for occurring drifting about in art is bigger, has been reported that statistics proximal ureteral calculus defeatedIt is displaced to pelvicaliceal incidence in urinary catheter mirror art and is up to 60%.It is soft that calculus after drift generally requires further row ureterMirror, percutaneous nephrolithy or the second stage of extracorporeal shock wave lithotripsy, not only increase operation wound and patient suffering, but also extend in hospitalTime increases treatment cost.
Urinary system calculus is common with ureteral calculi with kidney.Ureteroscope lithotrity carries out broken by human body natural's cavityStone has the advantages that minimally invasive and rubble is definite, is one of the essential therapeutic arsenals of current ureteral calculi.However in ureter,Epimere calculus and stone debris are easy in the recoil strength refunds kidney for being poured flow or rock breaking tool, and current ureteral calculi blocksDevice is mainly the structures such as sacculus or basket type, and wherein balloon structure, which exists, blocks the defects of power is insufficient, and basket type structure is thenOr there is the problems such as being not easy welt, if improveing this problem, welt is good, then may make knot there are inclination angle because of sideThe problems such as stone fragment is leaked out along inclination angle.
Invention content
The technical problem to be solved by the present invention is to：In order to overcome the problems referred above, a kind of ureteral calculi plugging device is provided.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of ureteral calculi plugging device includes the handle and outer sheath of connection, sliding block is provided on the handle, describedSliding block is connect with the one end for the wire being arranged in handle, and the other end of the wire passes through outer sheath, in outer sheathTop is fixedly connected with plugging device head, and the plugging device head is pulled back by memory alloy wire knitting forming in the wirePlugging device head is pulled in inside outer sheath when stretching.
Preferably, the plugging device head includes by the branch of the closure part and closure part front end of memory alloy wire knitting formingSupport part, the support portion are used to support the closure part, and plugging film, the closure part and gold are additionally provided with inside the closure partBelong to the joint face uniform indent of heart point thereto of silk.
Preferably, the support portion includes an inclined supporter, and the apical support of the supporter is in the closureIn portion.
Preferably, the upper and lower surface angle of the closure part is in positive angle.
Preferably, the front end center point of the support portion is additionally provided with top.
Preferably, the plugging device head is fixedly connected by pedestal with the wire.
Preferably, the memorial alloy is Ultimum Ti.
Preferably, the plugging film is macromolecule plugging film.
The beneficial effects of the invention are as follows：Plugging device head of the present invention is common using Ultimum Ti and macromolecule plugging filmIt constitutes, and plugging device head uses unique shape and Design of Mechanical Structure, can provide 1.：Higher intensity, be not easy becauseDeformation generates leakage bits；②：Better guidance quality allows clast to concentrate in the middle part of ureteral lumen, is not likely to produce side leakage；③：Because of memoryThe elasticity and Memorability of alloy so that plugging device head has better welt performance, is not likely to produce side leakage；
The advantages of this structure, is that structure meets ergonomics, and can one hand operated；Product on the market at presentConnection type need both hands to operate, the handle of our product uses integral handles, more degree of freedom limitations only to lean on singleHand can operate.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the structure of one embodiment of the invention；
Fig. 2 is the enlarged drawing of part A in Fig. 1 of the present invention.
It is marked in figure：1- handles, 2- outer sheaths, 3- plugging devices head, 11- sliding blocks, 31- wires, 32- pedestals, 33- envelopesStifled portion, 34- support portions, the tops 35-, 36- plugging films, 37- supporters.
Specific implementation mode
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only withIllustration illustrates the basic structure of the present invention, therefore it only shows the composition relevant to the invention.
Embodiment 1
A kind of ureteral calculi plugging device of the present invention as shown in Figs. 1-2, includes the handle 1 and outer sheath 2 of connection,Handle 1 is made of high molecular material and stainless steel, and main function is remote control, and sliding block 11 is provided on the handle 1, describedSliding block 11 is connect with the one end for the wire 31 being arranged in handle 1, and the other end of the wire 31 passes through outer sheath 2, outsideSheath 2 is made of the hollow lumen with certain support performance, and channel is provided for plugging device head 3 and wire 31；In epithecaThe top 35 of pipe 2 is fixedly connected with plugging device head 3, and the plugging device head 3 is by memory alloy wire knitting forming, in the metalSilk 31 pulls on plugging device head 3 inside outer sheath 2 when stretching backward.When handle 1 is pulled to proximal end, then plugging device head 3 entersAmong outer sheath 2, narrow positions can be passed through；When handle 1 push to distal end, then plugging device head 3 stretch out outer sheath 2 itOutside, calculus can be blocked；And when handle 1 pushes to distal end, handle 1 can block 2 chamber of outer sheath, in ureterLiquid can not flow out；The advantages of this structure, is that structure meets ergonomics, and can one hand operated；At present on the marketThe connection type of product needs both hands to operate, and the handle 1 of our product uses integral handles 1, more degree of freedom to limit,Only lean on one hand that can operate；
Plugging device head 3 of the present invention is collectively formed using Ultimum Ti and macromolecule plugging film 36, and plugging deviceHead 3 uses unique shape and Design of Mechanical Structure, can provide 1.：Higher intensity is not easy to generate leakage bits because of deformation；②：Better guidance quality allows clast to concentrate in the middle part of ureteral lumen, is not likely to produce side leakage；③：Because of the elasticity and note of memorial alloyThe property recalled so that plugging device head 3 has better welt performance, is not likely to produce side leakage.
In a preferred embodiment, the plugging device head 3 includes the closure part 33 by memory alloy wire knitting formingWith the support portion 34 of 33 front end of closure part, the support portion 34 is used to support the closure part 33, and 33 inside of the closure part is alsoIt is provided with plugging film 36, wherein closure part 33 is the Main physical skeleton for blocking calculus, since closure part 33 is memory wire31 weave, and can provide sufficient intensity prevents from impacting, and the hole smaller of the void ratio closure part 33 of plugging film 36 can preventLiquid and fine debris pass through；Support portion 34 plays the supporting role to closure part 33；The closure part 33 and wire 31The joint face uniform indent of heart point thereto, as shown in Figure 2, there are one inclination angle a for the inner concave, when flow rushes at 33 side of closure partWhen side, clast can be made to be flowed inwardly along inclination angle, rather than escaped by lateral gap, and the structure can be to blockDevice head 3 provides enough protecting against shock effects.
In a preferred embodiment, the support portion 34 includes an inclined supporter 37, the supporter 37Top 35 is supported on the closure part 33, and supporter 37 can be to provide enough support forces, prevents closure part 33 because of impactIt shakes, is more tilted to closure part 33 as shown in Fig. 2, angle of inclination c is bigger, then support force also accordingly increases, still after generationThe support force that support portion 34 provides is the impact for preventing flow, since support portion 34 and closure part 33 are all memorial alloy braidingsAt, described when wire 31 pulls back, pulling force has been more than the endurance of the two, then deformation retract enters outer sheath 2, whenSince the memory effect of memorial alloy returns to the original form again when release.
In a preferred embodiment, as shown in Fig. 2, the upper and lower surface angle of the closure part 33 is in positive angle b, the folderThe starting point at angle is the edge of seal edge portion, i.e., the edge thickness of closure part 33 wants thin compared to intermediate thickness, intermediate in this way to provideMore support forces provide enough intensity, and when the angle is timing, 33 structure of closure part is more reliable, and plugging device leaning angle is notEasily deformed because of water impact.
In a preferred embodiment, the front end center point of the support portion 34 is additionally provided with top 35, and top 35 is notBecome rusty Steel material, and collecting to support portion 34 is played the role of on top 35；.
In a preferred embodiment, the plugging device head 3 is fixedly connected by pedestal 32 with the wire 31.
In a preferred embodiment, the memorial alloy is Ultimum Ti, this is preferred selection, but is not limited toThis, also can be used other memorial alloys in the prior art.
In a preferred embodiment, the plugging film 36 is macromolecule plugging film 36, this is preferred selection, but unlimitedIn this, other plugging films 36 in the prior art also can be used.
The specific operating method of the present invention is provided below：
1. one-handed performance pulls sliding block 11 so that plugging device head 3 is taken among outer sheath 2；
2. outer sheath 2 is inserted into ureter guide sheath, and its front end is made to pass through stone location；
3. pushing sliding block 11 so that outer sheath 2 is stretched out on plugging device head 3, and self-expanding, the plugging device head 3 after swollenIn calculus distal end, prevent calculus from floating towards farther place；
4. Microendoscopic laser lithotripsy；
5. the modes such as vacuum suction remove clast；
6. scope exits；
7. plugging device is integrally slowly pulled out ureter, the clast that do not clean out is pulled out into ureter.
It is enlightenment with above-mentioned desirable embodiment according to the present invention, through the above description, relevant staff is completeVarious changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this inventionProperty range is not limited to the contents of the specification, it is necessary to determine its technical scope according to right.