CN201131824Y

CN201131824Y - Intracavity rack senter

Info

Publication number: CN201131824Y
Application number: CNU2007203048900U
Authority: CN
Inventors: 李潮
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-11-30
Filing date: 2007-11-30
Publication date: 2008-10-15
Anticipated expiration: 2017-11-30

Abstract

The utility model relates to a delivering and positioning device for positioning an intravascular stent into the vessel cavity, and belongs to a medical appliance. The appliance mainly consists of an outer sheath pipe 1, an inner sheath pipe 2, a pulling wire, a fixing rod and a guide tube, wherein the inner sheath pipe 2 can be moved inside the outer sheath pipe 1, and the pulling wire can be led out from a sheath pipe seat and pulled. The delivering and positioning device is characterized in that a supporting bracket part 3 restrained by the pulling wire is assembled in the outer sheath pipe 1 of the device, and the rest supporting bracket parts 4 which are not restrained by the pulling wire are assembled in the inner sheath pipe 2 of the device. Through respectively pulling the outer sheath pipe 1, the inner sheath pipe and the pulling wire, the release of the stent can be realized. The utility model is mainly used for positioning the intravascular stent into the vessel cavity, is especially suitable for positioning the stent at the bending position of the aortic arch, and can be used safely and reliably.

Description

The intracavity stent device that veers away

Technical field

This utility model relates to and a kind of support is positioned over the device that veers away in the lumen of vessels, and belongs to medical apparatus and instruments.

Background technology

At present, for the pathological changes that occurs in the human blood circulatory system, for example hemangioma or arteriorrhexis can adopt the method that gets involved in the tube chamber to treat.The basic skills of interventional therapy is by the operation system that veers away endoluminal stent to be sent to intravital diseased region directly to treat outside the patient body.The continuous development of interventional therapy can substitute operative treatment to a great extent, and the treatment risk is reduced.The suitable equipment that veers away is depended in the successful implementation of interventional therapy.Basic demand to the equipment that veers away is: the device that veers away can successfully be admitted to tube chamber and accurately arrive predetermined position, the support type artificial blood vessel that loaded in the device that veers away can be stabilized and be released in the lumen of vessels easily and the device that veers away is convenient to withdraw from.For realizing above-mentioned requirements, the sheath pipe of device of veering away has special important function: the device sheath pipe that both needed to veer away has slick outer wall to penetrate the peripheral blood tube wall, need the sheath pipe to have submissive performance again, also need the sheath pipe to have the accuracy and the stability of enough strength and stiffness needs when satisfy discharging institute's loading dock easily to pass through the vascular bending position.The present device that veers away also can't be in realize the veering away unification of function of single sheath pipe, and promptly the sheath pipe is submissive when sending into, firm when discharging.And the imperfection of the equipment that veers away can make the interventional therapy development be subjected to direct influence.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of lumen of vessels inner support device that veers away, and makes it can break away from the restriction of sheath pipe and discharges support smoothly.

The designed lumen of vessels inner support of this utility model device that veers away, mainly by the epitheca pipe of phase intussusception, interior sheath pipe, drawing silk and decide bar and conduit constitutes, in the epitheca pipe of the device that veers away, load in advance and support is formed the part support that retrains, in the interior sheath pipe of the device that veers away, load the remainder support by drawing silk.

In this utility model, interior sheath pipe box is folded in the epitheca pipe, and the gap between interior sheath pipe outer wall and the epitheca inside pipe wall is between 0.01mm～2mm, and the sheath pipe moves in the epitheca pipe in allowing, and interior sheath pipe can stretch out in the epitheca pipe.

In this utility model, decide bar and be positioned at the sheath pipe, decide gap between bar outer wall and the interior sheath inside pipe wall between 0.01mm～2mm, it is mobile in interior sheath pipe to allow decide bar, and decides bar and can stretch out in interior sheath pipe.

In this utility model, conduit is positioned at decides bar, allows conduit mobile in decide bar, and conduit can be made by oneself in the bar and stretches out.

In this utility model, drawing silk can be single or many, can be between epitheca pipe and interior sheath pipe, also can be between interior sheath pipe and epitheca pipe, and the drawing silk front end can stretch out in the sheath pipe, and pulling is drawn and controlled to the drawing silk tail end by the base side opening.

The designed lumen of vessels inner support of this utility model veer away device when using with the existing device that veers away similar substantially with, also be the standoff device that veers away of loading to be sent into reach diseased region in the lumen of vessels, withdraw from the device that veers away behind the release support.Different is that the designed sheath tubular construction of this utility model is broken down into the epitheca pipe and the interior sheath pipe of phase intussusception, and the drawing silk of control support restrained condition.The epitheca pipe is smooth submissive, is suitable for the device that veers away is sent into blood vessel.The device intravasation intracavity of waiting to veer away at first discharges the part that support is pulled the silk constraint from the epitheca pipe.This moment, restrained support still kept not release conditions after breaking away from the epitheca pipe, thereby was able under the condition of breaking away from the restriction of sheath pipe fully crooked.Meanwhile, the remainder of support is still in being loaded in the sheath pipe.Interior sheath pipe more stable and stronger can be controlled moving and the location of the device that veers away, and makes support easily pass through the crooked position of blood vessel, also can be when discharging support with decide the bar jointly stabilizing device that veers away, by spurring drawing silk and interior sheath pipe respectively, realize the location release of support.

The veer away advantage of device of the designed endoluminal stent of this utility model is:

1. the epitheca pipe is exclusively used in and protects the device intravasation intracavity that veers away;

2. after breaking away from the epitheca pipe, the support that is pulled the silk constraint can be fully crooked under the situation of no sheath pipe restriction, smoothly by the vascular bending position, and the influence of avoiding the sheath pipe that support is sent into;

3. interior sheath pipe is exclusively used in the stable device that veers away, and improves the localized accuracy of support;

4. drawing silk is littler than sheath pipe friction resistance, helps easily discharging support.

The designed lumen of vessels inner support of this utility model device that veers away is applicable to and places lumen of vessels inner support or stent-graft, need to be specially adapted to the occasion by the crooked position placing rack.

Description of drawings

Fig. 1 is the designed lumen of vessels inner support of this utility model device that veers away, and the view when showing epitheca pipe tie bracket: sheath pipe in the 1-epitheca pipe, 2-, 3-are pulled the holder part of silk constraint, and 4-is not pulled the holder part of silk constraint.

Fig. 2 is the designed lumen of vessels inner support of this utility model device that veers away, show that support is pulled the view of a constraint portions when breaking away from the sheath pipe: 1-epitheca pipe, sheath pipe in the 2-, 3-are pulled the holder part of silk constraint, and 4-is not pulled the holder part of silk constraint.

Fig. 3 is the designed lumen of vessels inner support of this utility model device that veers away, and shows the view when support is discharged fully: sheath pipe in the 1-epitheca pipe, 2-, 3-are pulled the holder part of silk constraint, and 4-is not pulled the holder part of silk constraint.

The specific embodiment

In conjunction with specific embodiments the veer away structure and the embodiment of device of the designed endoluminal stent of this utility model is described further with reference to the accompanying drawings below.

The device that veers away of lumen of vessels inner support as shown in the figure show the epitheca pipe 1 and the interior sheath pipe 2 of phase intussusception, and support is pulled the part 3 of silk constraint and is not pulled the part 4 that silk retrains.1 and 2 gap is 0.2mm.Drawing silk is single, at interior sheath pipe with decide between the bar, and draws through interior sheath tube socket side opening.In Fig. 1,3 are loaded in 1, and 4 are loaded in 2.Fig. 1 shows the state when veering away the device intravasation.In Fig. 2,, make 3 from 1, to break away from by spurring 1.3 are in no sheath pipe restrained condition, only are subjected to the constraint of drawing silk.4 still are loaded in 2.Fig. 2 shows the send into state of device in lumen of vessels that veer away, the state when comprising by the vascular bending position.In Fig. 3, by pulling drawing silk and 2, make the constraint of 3 disengaging drawing silks respectively, make the constraint of 4 disengagings 2, cause 1 and 2 and 3 and 4 to break away from fully.Fig. 3 shows that the device that veers away finishes the release of support, is in the state that withdraws from blood vessel.

This utility model is controlled the epitheca pipe of the device that veers away, interior sheath pipe and drawing silk by substep, reaches the purpose of smooth release lumen of vessels inner support or stent-graft, improves success rate and accuracy that support discharges thus, improves the safety and the reliability of treatment.

Claims

1. lumen of vessels inner support device that veers away, mainly by the epitheca pipe of phase intussusception, interior sheath pipe, drawing silk and decide bar and conduit constitutes, it is characterized in that: in the epitheca pipe of the device that veers away, load part support, in the interior sheath pipe of the device that veers away, load the part support that all the other are not pulled the silk constraint by the drawing silk constraint.

2. the lumen of vessels inner support according to claim 1 device that veers away, its feature also is: interior sheath pipe box is folded in the epitheca pipe, gap between interior sheath pipe outer wall and the epitheca inside pipe wall is between 0.01mm～2mm, and the sheath pipe moves in the epitheca pipe in allowing, and interior sheath pipe can stretch out in the epitheca pipe.

3. the lumen of vessels inner support according to claim 1 device that veers away, its feature also is: decide bar and be positioned at the sheath pipe, decide gap between bar outer wall and the interior sheath inside pipe wall between 0.01mm～2mm, it is mobile in interior sheath pipe to allow decide bar, and decides bar and can stretch out in interior sheath pipe.

4. the lumen of vessels inner support according to claim 1 device that veers away, its feature also is: conduit is positioned at decides bar, allows conduit mobile in decide bar, and conduit can be made by oneself in the bar and stretches out.

5. the lumen of vessels inner support according to claim 1 device that veers away, its feature also is: drawing silk can be single or many, can be between epitheca pipe and interior sheath pipe, also can be between interior sheath pipe and epitheca pipe, the drawing silk front end can stretch out in the sheath pipe, and pulling is drawn and controlled to the drawing silk tail end by the base side opening.