CN2602783Y

CN2602783Y - Recoverable all film covered nickel-titanium alloy intraescophageal support

Info

Publication number: CN2602783Y
Application number: CN 02255349
Authority: CN
Inventors: 郭喜田
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-11-18
Filing date: 2002-11-18
Publication date: 2004-02-11
Anticipated expiration: 2012-11-18

Abstract

The utility model provides a bracket in a retractable full tectorial Nitinol oesophagus for curing oesophagus malignant benign narrow and oesophagus windpipe fistula. The bracket is formed by the Nitinol wire, the top is intumescent in cup edge, and the loss lining full tectorial is adopted which concaves inwards a little taking the frame mesh as a unit. A nylon silk thread goes through the frame top opening and continuously through the two circles (outer and inner) and forms a six angles star shape in the oral cavity on the bracket, and any point of the pulling line in the cavity can furl the bracket top opening. The retract equipment is divided into a guiding shoe group and a retract pole which is internally fixed with three cavities of which one cavity is inside provided with a retract hook, another cavity is for guiding wire and the third cavity is for filling freeze water. When in operation, the utility firstly takes the guiding shoe, and then takes the retract pole by use of the guiding shoe, after hooking the retract line fills freeze water through the side pipe, then pulls the bracket in the guiding shoe and then the bracket is pulled out of the body together with the guiding shoe.

Description

Recyclable full membrane covered nickel-titanium alloy stent in esophagus

Affiliated technical field

This utility model relates to the medical apparatus field, belongs to insert body cavities in the interventional medicine to remove narrow or a kind of recoverable support structure of sealing fistula mouth and the structure of retracting device thereof.

Background technology

Internal metal rack treatment esophageal benign and malignant malignant stricture is used widely clinical having obtained, and inserting internal metal rack for malignant stricture is as a kind of palliative therapy means, and support need not to take out.And for benign stricture, lose speed disease, esophagus anastomotic stenosis after surgery or cicatricial stricture etc. as reflux esophagitis, esophagus chemical burn, cardia, because the long-term indwelling of support produces inflammatory reaction, edema and the hypertrophy that physicochemical irritation causes local mucous membrane, cause restenosis, foreign body sensation, pain etc., generation for long term complication in preventing, need to finish the supporting role of regular period at support, after the narrow positions expansion is shaped with its taking-up.A kind of recoverable support that Chinese patent 95241211.X provides is the Z type overlay film frame that adopts stainless steel silk to make, there is agnail to prevent that support from gliding, support inside and outside two circles and the nylon wire that support girth suitable for reading causes worn suitable for reading hooks inner ring nylon wire revenue and expenditure frame back and forth with metal hook.This support is because of being equipped with anti-skidding agnail, and patient's foreign body sensation and pain are often heavier in clinical practice, and simultaneously, agnail can not effectively prevent to move in the displacement, particularly support of support.The Z type support tension force that stainless silk is made is bigger, and agnail is arranged again, and very big resistance is arranged during recovery, pulls out by force and often causes heavier mucosa injury.Support exhausting line suitable for reading is consistent with support girth suitable for reading, is close to suitable for readingly, and support is suitable for reading imbeds mucosa together with exhausting line because mucosa alluvial, inflammatory edema and hypertrophy easily make after support is inserted certain hour, makes support reclaim difficulty.Chinese patent 99217764.2 provides a kind of recyclable nick-eltitanium alloy stent, but because of support does not have tunicle, can embed mucosa after inserting the human body certain hour, simultaneously, because the stimulation of support makes local mucous membrane produce inflammatory reaction, myxedema and hypertrophy occur, and form restenosis from the support mesh support intracavity of growing into, support is embedded in that tissue is interior can't to be taken out.

Summary of the invention

This utility model provides a kind of recyclable full membrane covered nickel-titanium alloy stent in esophagus and retracting device thereof stable and reliable for performance.

The technical scheme in the invention for solving the technical problem is: be woven into webmaster shape support with a nitinol alloy wire, the rim of a cup shape that the thickness unanimity is made in the support upper end expands, and the support upper end is rectangular or acute angle with the body interface.The support intracavity adopts the loose complete overlay film of lined, and film is that unit slightly caves in to intracavity with the support mesh.The support nylon yarn of the enough intensity of a rhizopodium of wearing suitable for reading is as exhausting line, this line at first penetrates nitinol alloy wire fold back place in turn along support interval suitable for reading, after wearing a circle, put on first astragal in turn along support inwall suitable for reading again, having worn the second circle back exhausting line continuously converges end to end mutually, tighten the back knotting, exhausting line is worn into the hexagonal star-shape of a rule in support intracavity suitable for reading, and any point that lifts exhausting line at intracavity all can make support gathering suitable for reading.Retracting device is made up of bridle catcher and guide sheath group two parts, and the guide sheath group comprises guide sheath and dilator, and bridle catcher can pass through the guide sheath inner chamber.Bridle catcher is a rod shaped structure, and there are three chambeies inside, and an intracavity is a recovering hook, and front end is oblique and is shaped on side and splits; Another intracavity is walked seal wire; The 3rd chamber is used to annotate frozen water, and far-end has a plurality of side openings, and near-end is connected with side pipe.Three chambeies are triangularly arranged, and its front end length differs, and make the bridle catcher front end tapered.Guidewire lumen is the longest, annotates water freezing cavity and takes second place, and the recovering hook chamber is the shortest.Recovering hook is made by stainless steel silk, and front end is a hook-type, and tail end is made ring-type.

The beneficial effects of the utility model are:

1, is the rim of a cup shape on the support and expands, the rectangular or acute angle of upper end and body intersection.Support adopts the loose complete overlay film of lined, film is that unit slightly caves in to intracavity with the support mesh, increased the contact surface of support and tissue greatly, tissue can be along the support mesh slightly to convex, support is played fixation, can effectively prevent the support slippage, can prevent again that simultaneously nitinol alloy wire from imbedding in the tissue and organize the support intracavity of growing into.

2, exhausting line is worn by a continuous nylon wire, wears the hexagonal star-shape of rule in support intracavity suitable for reading, can prevent effectively that exhausting line from imbedding mucosa, is convenient to recovering hook again and hooks exhausting line, hooks exhausting line any point at intracavity and all can make support gathering suitable for reading.

3, seal wire be can pass through in the bridle catcher, the stability of support recovery and the accuracy of operation increased.

4, bridle catcher is provided with the water filling side pipe, can inject frozen water when reclaiming support, and deliquescing after the nick-eltitanium alloy stent chance frozen water has reduced the resistance that reclaims, and has alleviated the damage of mucosa when reclaiming.

5, recovering hook chamber front end is oblique, and is shaped on side and splits, and when recovering hook was pulled back, recovering hook was reduced to its front end of intracavity and embeds in side splits, and can effectively lock exhausting line, prevents to lift in the support process exhausting line landing from the recovering hook.

Description of drawings

Below in conjunction with drawings and Examples this utility model is further specified.

Fig. 1 is recyclable full membrane covered nickel-titanium alloy stent in esophagus structural representation

Fig. 2 is a recyclable full membrane covered nickel-titanium alloy stent in esophagus structural representation suitable for reading

Fig. 3 is Fig. 2 local detail structural representation

Fig. 4 is the bridle catcher structural representation

Fig. 5 is Fig. 4 body section structure sketch map

Fig. 6 is Fig. 4 recovering hook front end morphosis sketch map

Fig. 7 is Fig. 4 recovering hook chamber front end morphosis sketch map

Fig. 8 is that recovering hook is in the recovery view

Fig. 9 is a guide sheath group structural representation

Among the figure, 1 is the support body, and 2 is body and upper end interface, 3 is the support upper end, and 4 is nitinol alloy wire support fold back suitable for reading place, and 5 is section outside the chamber, exhausting line outer ring, 6 for reclaiming toe-in, and 7 is nitinol alloy wire, and 8 is exhausting line outer ring intracavity section, 9 is the exhausting line inner ring, and 10 is film, and 11 is seal wire, 12 is the water-injecting cavity side opening, and 13 is the bridle catcher body, and 14 is the water-injecting cavity side pipe, 15 is handle, and 16 is the recovering hook body, and 17 is the recovering hook tail end, 18 is guidewire lumen, and 19 is the recovering hook chamber, and 20 is water-injecting cavity, 21 is the recovering hook end points, and 22 is recovering hook first break, and 23 is recovering hook second break, 24 is recovering hook the 3rd break, h is point 23 distances 22, the vertical dimension of 24 liang of lines, 25 split for side, and 26 is the inclined-plane, Φ is recovering hook intracavity footpath, 27 is guide sheath, and 28 is the dilator guidewire lumen, and 29 is dilator.

The specific embodiment

Be woven into webmaster shape support with nitinol alloy wire 7, upper end 3 is the rim of a cup shape expands, body and upper end interface 2 rectangular or acute angles, morphosis such as Fig. 1.Adopt the complete overlay film 10 of loose lined, film is overlying on support chamber face, and is that unit slightly caves in to intracavity with the support mesh.At the support exhausting line of wearing suitable for reading, at first penetrate nitinol alloy wire fold back place 4 in turn along support interval suitable for reading, after wearing a circle, continuation is put on first astragal 8 in turn along support inwall suitable for reading, having worn second astragal, 9 back exhausting lines continuously converges end to end mutually, tighten back knotting 6, exhausting line wears as shown in Figure 2 hexagonal star-shape in support intracavity suitable for reading, and any point that lifts exhausting line all can make support gathering suitable for reading.Make bridle catcher shown in Figure 4 with plastic tube and steel wire, in three chambeies are arranged, internal diameter Φ is 1.2mm, the stainless steel silk of recovering hook 16 usefulness diameter 1mm is made, front end is processed into as shown in Figure 6 hook-shaped, 21,23,24 3 point-blank, h=Φ, recovering hook tail end 17 is made the annular of diameter 2.5cm.The guide sheath group is made by plastic tube as shown in Figure 9, and dilator 29 front ends are made taper shape, in the guidewire lumen 28 of diameter 1.2mm is arranged, dilator 29 can insert guide sheath 27 intracavity, the two engages closely, bridle catcher can pass through from the guide sheath intracavity.

Under monitoring, the X line earlier seal wire 11 per os are introduced the support intracavity during operation, introduce the guide sheath group along seal wire, then, withdraw from dilator 29, keep guide sheath 27 and seal wire 11, guide sheath 27 front ends place support top slightly suitable for reading, introduce bridle catcher along seal wire 11, and recovering hook is in recovery state as shown in Figure 8 during introducing.Thumb is inserted in the recovering hook afterbody ring 17 when handling bridle catcher, and four refer to hold handle 15 in addition, the recovery of controlling recovering hook with thumb with stretch out.Bar front end to be recycled cross support suitable for reading after, stretch out recovering hook, upwards lift bridle catcher then, hook and make behind the exhausting line recovering hook be in as shown in Figure 8 recovery state, inject an amount of frozen water from side pipe 14, lift support then to guide sheath and together pull out external together with guide sheath.

Claims

1, a kind of recyclable full membrane covered nickel-titanium alloy stent in esophagus is characterized in that: by the webmaster shape support that a successive nitinol alloy wire braiding forms, the rim of a cup shape that the support upper end is the thickness unanimity expands, the rectangular or acute angle of body and upper end intersection.Support adopts the loose full overlay film of lined, and film is that unit slightly caves in the support mesh.The support nylon yarn of the enough intensity of a rhizopodium of wearing suitable for reading is as exhausting line, this line at first penetrates nitinol alloy wire fold back place in turn along support interval suitable for reading, after wearing a circle, put on first astragal in turn along support inwall suitable for reading again, having worn the second circle back exhausting line continuously converges end to end mutually, tighten the back knotting, exhausting line is worn into the hexagonal star-shape of a rule in support intracavity suitable for reading.

2, recyclable full membrane covered nickel-titanium alloy stent in esophagus according to claim 1 is characterized in that: support adopts the loose full overlay film of lined, and film is that unit slightly caves in the support mesh.

3, recyclable full membrane covered nickel-titanium alloy stent in esophagus according to claim 1, it is characterized in that: the support nylon yarn of the enough intensity of a rhizopodium of wearing suitable for reading is as exhausting line, this line at first penetrates nitinol alloy wire fold back place in turn along support interval suitable for reading, after wearing a circle, put on first astragal in turn along support inwall suitable for reading again, worn the second circle back exhausting line continuously and converged mutually end to end, tightened the back knotting, exhausting line is worn into the hexagonal star-shape of a rule in support intracavity suitable for reading.

4, a kind of retracting device of recyclable full membrane covered nickel-titanium alloy stent in esophagus is characterized in that: there are three chambeies bridle catcher inside, and an intracavity is a recovering hook, and front end is oblique and is shaped on side and splits; Another intracavity is walked seal wire; The 3rd chamber front end has a plurality of side openings, and near-end is connected with side pipe and is used to annotate frozen water.