CN1141912C - Implanting device of duct/cavity dilating rack - Google Patents

Abstract

The present invention discloses an implanting device of a duct and cavity dilating rack. The implanting device of the duct and cavity dilating rack is composed of a fiberoptic endoscope, a duct and cavity dilating rack, a rack bound sheath and a metal wire switch, wherein the duct and cavity dilating rack is sheathed on the front end of the fiberoptic endoscope, the rack bound sheath makes the rack keep thin and long, and the metal wire switch opens the rack bound sheath. The rack bound sheath is a wire sheath which is coated on the outside of the tubular duct and cavity dilating rack and wound with wires back and forth with the metal wire switch as a shaft. When the metal wire switch is drawn away, the rack bound sheath dehisces at the place where the metal wire switch is drawn away, and the rack is released and recovers a short and thick shape to make the narrow duct and cavity braced. The implanting device has the advantages of easy manufacture, easy and simple operation and exact positioning.

Description

A kind of implanting device of duct/cavity dilating rack

The present invention relates to technical field of medical instruments, is a kind of tube chamber expandable stent embedded device.

Human Physiology tube chamber narrow, usually cause serious consequence, cause the body function obstacle, as angiostenosis cause that coronary heart disease, tracheal stenosis cause and suffocates, esophagostenosis causes esophageal obstruction, the narrow initiation intestinal obstruction of intestinal tube, biliary tract stenosis cause obstruction of biliary tract, urethral stricture causes urine retention etc.One of treatment means of luminal stenosis is by the support inserter various expandable stents to be presented in the narrow tube chamber of human body at present, and is narrow to remove, and reaches the purpose of treatment.

The tube chamber expandable stent is a kind of grid duct shape support with the Ultimum Ti material, can be drawn into elongated shape.Under cryogenic condition, make it become elongated shape, insert in the body, near body temperature the time, restore to the original state expansible narrow tube chamber immediately.Existing inserter is linked in together by trocar sheath, propelling movement pipe and three layers of tubular structure of inserter core to be formed.Skin is a trocar sheath, and the middle level is to push pipe, and nexine is the inserter core, and the inserter core is a hollow-core construction, can penetrate seal wire.Earlier the support of elongate tubular is installed in the gap of trocar sheath and inserter core of front end of inserter, the relative slip by trocar sheath and propelling movement pipe discharges support.During clinical practice, must explore the way earlier with fiberendoscope, determine the luminal stenosis position after, insert the position of support at the body surface labelling with galvanized wire, seal wire is sent into and is passed through narrow by fiberendoscope then, withdraw from fiberendoscope again, at last the inserter that installs support is slided into narrow positions along seal wire, discharge support, the support reinstatement, narrow tube chamber is strutted, withdraw from inserter, EO.The shortcoming of above-mentioned inserter is: it is loaded down with trivial details consuming time that (1) inserts process; (2) narrow tube chamber will stand fiberendoscope and twice insertion process of support inserter, not only patient's misery can be increased, and the damage of tube chamber can be increased, might be because mucosa swelling causes the obturation of tube chamber, this kind situation can cause patient's death as occurring in trachea; (3) determine luminal stenosis position and labelling from fiberendoscope, to inserting inserter and discharging support, overall process need be carried out under X line perspective, and patient and medical personnel are had damage; (4) the support inserter is when discharging support, because trocar sheath is firmly reverse with the propelling movement pipe, two-way slip might make the support dislocation of inserting; (5) above-mentioned put procedure radioscopy machine, body surface location and several medical worker's co-operating must be arranged, thereby expense is expensive, can not satisfy the requirement of emergency treatment work.

The purpose of this invention is to provide a kind of simple to operation, accurate positioning, expense is cheap and does not need the implanting device of duct/cavity dilating rack of X line perspective.

The present invention is made up of fiberendoscope, the tube chamber expandable stent that is enclosed within the fiberendoscope front end, the tinsel switch that makes the tube chamber expandable stent keep longilineal support constraint cover and the constraint of unlatching support to overlap.Support constraint cover is that the tinsel switch is wrapped in the outer line cover that forms of piped tube chamber expandable stent for axle twines back and forth with line.When taking the tinsel switch away, support constraint cover just splits from this, and the tube chamber expandable stent is released, and resiles.The present invention fetters into cover in bond about 5 millimeters places behind the movable part that longilineal tube chamber expandable stent is enclosed within the fiberendoscope front end when clinical use, as shown in Figure 3.Routinely fiberendoscope is inserted tube chamber, when finding narrow positions, then can the tube chamber expandable stent be positioned the luminal stenosis position at direct view under endoscope, extract the tinsel switch out, just can discharge the tube chamber expandable stent, its shortening chap resiles, and narrow tube chamber expansion is come, then that the line of support constraint cover is external through the protecting pipe extraction, at last fiberendoscope is taken out.

Advantage of the present invention is: the whole operation process is once finished, and is simple and convenient, and accurate positioning does not need many people's co-operatings, alleviated the painful and dangerous of patient, avoided the irradiation of X ray, satisfies the requirement of emergency treatment work, reduced medical expense.

Description of drawings:

Fig. 1 is that tube chamber expandable stent of the present invention is subjected to the support constraint to overlap outward appearance schematic side view when fettering;

Fig. 2 is that tube chamber expandable stent of the present invention is subjected to support to fetter the plan structure sketch map that overlaps when fettering;

Fig. 3 is an integral assembling structure sketch map of the present invention.

Now in conjunction with the accompanying drawings the present invention is further described.

Implanting device of duct/cavity dilating rack of the present invention is made up of fiberendoscope 1, tube chamber expandable stent 2, support constraint cover 3, support constraint cover exhausting line 4, support constraint cover exhausting line draw ring 5, support constraint cover tinsel switch 6, support constraint cover tinsel switch draw ring 7 and exhausting line and protecting pipe wiry 8.Tightly being restrainted into longilineal tube chamber expandable stent 2 by support constraint cover 3 is enclosed within after the fiberendoscope front end 1, support constraint cover 3 is that to serve as axle with line twine back and forth tightly is wrapped in the outer line cover of support 2 with the tinsel switch, and an end of tinsel switch 6 overlaps tinsel switch draw ring 7 through protecting pipe 8 and support constraint and is connected.Support constraint cover exhausting line 4 is extensions of constraint cover line, is connected with support constraint cover exhausting line draw ring 5 through protecting pipe.

The tube chamber expandable stent of different size model is formed the finished product of structure as shown in Figure 1 and Figure 2 with the constraint of constraint cover, during clinical use, can select corresponding finished product to be equipped with fiberendoscope according to state of an illness needs, is combined into implanting device of duct/cavity dilating rack.

Embodiment

To the patient of tracheal stenosis, can select branchofiberoscope (OLYMPUS BF 40) and constraint back diameter for use is that 6 millimeters, length are 50 millimeters the synthetic implanting device of duct/cavity dilating rack of recalled nitinol alloy stent finished product cover.Under the branchofiberoscope direct-view, the tube chamber expandable stent is positioned the tracheal stenosis position, with draw ring 7 the tinsel switch is extracted out from the constraint cover, the constraint cover is opened, discharge the tube chamber expandable stent, this support under the elastic force effect its to return to diameter be 18 millimeters, length is 40 millimeters, and narrow tracheaectasy is come, at last branchofiberoscope is taken out, promptly finished the installation of support.

If the grid duct shape support that materials such as the present invention's employing medical stainless steel are made also can play same effect as the tube chamber expandable stent.

Claims (1)

1, a kind of implanting device of duct/cavity dilating rack, comprise tube chamber expandable stent, support constraint cover and fiberendoscope, it is characterized in that described tube chamber expandable stent is placed in the outer fiberendoscope front end of fiberendoscope, said support constraint cover has a tinsel switch, it is to be that twining back and forth of switch is wrapped in the outer line cover that forms of tube chamber expandable stent with the tinsel that cover is tied up at the support end, when taking the tinsel switch away, support constraint cover splits, and discharges the tube chamber expandable stent.

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