CN102038565A - Novel great vascular stent delivery system - Google Patents
Novel great vascular stent delivery system Download PDFInfo
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- CN102038565A CN102038565A CN2010106086968A CN201010608696A CN102038565A CN 102038565 A CN102038565 A CN 102038565A CN 2010106086968 A CN2010106086968 A CN 2010106086968A CN 201010608696 A CN201010608696 A CN 201010608696A CN 102038565 A CN102038565 A CN 102038565A
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- pipe
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- hairspring
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- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000010935 stainless steel Substances 0.000 claims abstract description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 6
- 241000463219 Epitheca Species 0.000 claims description 26
- 239000004033 plastic Substances 0.000 claims description 15
- 210000004204 blood vessel Anatomy 0.000 claims description 13
- 229920002614 Polyether block amide Polymers 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 6
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 4
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 238000001727 in vivo Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229920002530 polyetherether ketone Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 3
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- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 210000005239 tubule Anatomy 0.000 claims description 3
- 238000009827 uniform distribution Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
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- 238000007599 discharging Methods 0.000 description 2
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Abstract
The invention belongs to the field of medical devices, and in particular to a great vascular stent delivery system capable of realizing a front-end back release function. The great vascular stent delivery system is composed of a locating guide head, a back release mechanism, a core tube, a middle tube, a sheath tube, a big handle, a small handle and a push rod which are sequentially arranged from front to back. The whole system has the advantage of simple mechanism, is convenient in operation and safe in use and is capable of effectively avoiding the phenomena of release in advance and failure in release; and meanwhile the stainless steel core tube is locally engraved into a spring, thus achieving the purposes of reducing core tube diameter and system size, greatly improving flexibility of the far end of the system, and reducing vascular injury caused by the system during the delivery process.
Description
Technical field
The invention belongs to medical instruments field, particularly a kind ofly realize that the trunk support of release function is broadcasted system behind the front end.
Background technology
Arotic disease particularly aortic aneurysm is a kind of serious threat patient life, the cardiovascular injuries emergency case that fatality rate is high.According to statistics, therapist 5 annual death rate are not 50%～76%, and merging heart and lung diseases person's mortality rate is up to 93%.Before the nineties, surgical operation is the main method of treatment arotic disease, but this operation method wound is big, operating time is long, complication is many, mortality rate is high, and the thoracoabdominal aortic aneurysm operative mortality reaches 5%～26%, and the paraplegia incidence rate is 4.6%.In recent years, hinder the development of interventional therapeutic technique along with Wicresoft, endoluminal vascular support graft exclusion treatment arotic disease is used widely, this operation method have wound little, go out insufficiency of blood, the unrivaled advantages of traditional surgery method such as treatment time weak point, good effect, repeatable treatment.Promptly utilize the intravascular stent delivery device that intravascular stent is sent into diseased region, the blood flow of interlayer or tumor intracavity is disappeared, form thrombosis, after this absorb gradually or isolated pathological changes, to reach the purpose of treatment arotic disease by intravascular stent.
The common system of broadcasting does not have relieving mechanism behind the front end, when discharging first section overlay film section, because instantaneous blocking-up thoracic aorta inner blood, make its interior blood pressure rise sharply, the impact of high pressure blood flow makes support that displacement in various degree take place, and can not accurately be placed on the precalculated position, and part covers the branch vessel outlet, can not fine shutoff aneurysm interlayer, make therapeutic effect have a greatly reduced quality.
For fear of the problems referred to above, external like product mostly adopts the system that broadcasts of relieving mechanism behind the band front end, and is respond well.Mainstream product has COOK, Mei Dunli, JOTEC, RELAY etc.Especially the product of RELAY when discharging, has realized that also the classification of support discharges after realizing front end, has avoided the appearance of the problems referred to above well.But these broadcast system structure complexity, complex operation, broadcast that system's far-end compliance is poor, system's diameter is bigger, and are bigger to blood vessel injury, are not suitable for asian population.
Summary of the invention
The purpose of this invention is to provide and a kind ofly realize that the trunk support of release function is broadcasted system behind the front end.System structure is simple, when reducing system dimension, improves the compliance of system's far-end, and system is to the damage of blood vessel in the reduction dispose procedure.
For achieving the above object, the present invention takes following design:
This trunk support is broadcasted system, is made up of orientation direction head, back relieving mechanism, core pipe, middle pipe, epitheca pipe, big handle, miniature lever and several parts of push rod from front to back.
Described back relieving mechanism is made up of dowel bushing that has central through hole and five-pointed star connector, and the front end of dowel bushing is connected with described orientation direction head by screw thread; The five-pointed star connector is 5 pin holes of uniform distribution along the circumferential direction, along the circumferential direction evenly fixing and described pin hole 5 pins one to one on the dowel bushing; Bulky spring pipe and hairspring pipe that described core pipe is a spring by two front ends are formed, and the hairspring pipe is positioned at the bulky spring pipe; Fixedly connected with the front end of bulky spring pipe by the central through hole inwall of five-pointed star connector in back relieving mechanism rear end, the front end of hairspring pipe passes the bulky spring pipe fixedlys connected with the central through hole inwall of dowel bushing; Described hairspring pipe can drive dowel bushing and pin moves back and forth in the pin-and-hole of five-pointed star connector; The middle part of five-pointed star connector is provided with groove, makes 5 naked ends of trunk support to embed wherein, and 5 pins that are inserted into pin-and-hole are limited in the groove, realizes restriction and release to the naked end of trunk support.
Pipe and the rear end of described bulky spring pipe be by being threaded or heat seal is connected in described, and extend back and pass epitheca pipe, handle greatly successively, stretches into the miniature lever internal fixation.
Outside the pipe, fixedlyed connected with big handle in the rear end during described epitheca pipe box was loaded on; Front end at the epitheca pipe is provided with Pt/Ir metal development ring, shows the definite position that the system that broadcasts arrives in vivo in operation process.
The inner slotted hole for the front and back perforation of described big handle stretches out a tubule and is connected with the prolongation pipe that has three-way connector on the sidewall of posterior segment, go between the endoporus inflow epitheca Guan Yuzhong pipe of big handle thereby liquid can and prolong pipe flow by three-way connector; Big handle rear end is provided with silica gel sealing ring and screws nut, by screwing nut crush seal circle, thereby compresses middle pipe, reach fixing in the effect of pipe and sealing.
The front end of described miniature lever is connected and fixed by handle body and middle pipe, and the rear end is connected and fixed by the rear end of push rod and hairspring pipe; The terminal mouth of pipe of miniature lever place is provided with and pushes nut and lock-screw, adopts threaded engagement between described push rod and the propelling movement nut.
Described orientation direction head is made by the medical plastic that comprises PEBAX, PE, PU, PEEK, PP, and hardness is 20～50D, and smooth in appearance is used for system is imported in the blood vessel.
Described dowel bushing and five-pointed star connector are made by high rigidity POM, PEBAX medical plastic or rustless steel, and described pin is made by stainless steel silk or ti-ni shape memory alloy silk.
Described epitheca pipe is the pipe that the three-layer-material extruding combines, and skin is the PEBAX medical plastic, the netted reinforcing rib that the centre is woven into for the rustless steel flat filament, and internal layer is PTFE, and inner surface is smooth, and overall wall thickness is 0.1～0.3mm.
Described core pipe is a stainless steel, selects medical grade 304,316 or 316L rustless steel for use.
Pipe is made by the medical plastic that comprises PEBAX, PE, PU, PEEK, PP in described, and hardness is 30～70D.
The material of described miniature lever is the medical plastic that comprises POM, PVC, PP.
Advantage of the present invention is:
1, the back relieving mechanism has realized that the drawback that displacement can not accurately be placed takes place to discharge the support of having avoided causing because of instantaneous blocking-up aorta inner blood behind the front end of trunk support.Back relieving mechanism compact conformation, smooth safety when in blood vessel, moving.Mechanism and orientation direction head are by being threaded and boning, and be solid and reliable.
2, the core pipe is made up of stainless steel spring pipe-bulky spring pipe and hairspring pipe that two parts are engraved as spring.The tensile strength height of stainless steel tube when guaranteeing safety, can reduce wall thickness, reduces the entire system diameter, thereby reduces the wound of the system of broadcasting to blood vessel.The stainless steel tube part is engraved as spring, can increases the compliance of system greatly, in avoiding performing the operation to the damage of blood vessel.
3, described epitheca pipe is the pipe that the three-layer-material extruding combines.The PTFE material surface of epitheca inside pipe wall is smooth, and is low with the coefficient of friction of middle pipe, makes that resistance is less when pushing support; Netted reinforcing rib makes the epitheca thickness of pipe wall that enough rigidity and intensity be arranged in the time of less, be difficult for by the support of the trunk support in it distortion, be difficult in pushing the support process, being pulled out of shape or breaking, be difficult in blood vessel, dead folding occurring and causing support to discharge when crooked.Not only reduce the overall dimensions of system but also guaranteed the safety of system.Epitheca pipe front end has Pt/Ir metal development ring, shows the definite position that the system that broadcasts arrives in vivo in operation process, realizes the accurate location to support.
4, miniature lever is simple and compact for structure than like product, and is easy and simple to handle, safe in utilization.The propelling movement nut turns clockwise, push rod drives hairspring pipe, dowel bushing, 5 pin recession, after pinning 5 naked ends of trunk support, screw lock-screw, thus can prevent in transportation or in the operation maloperation and making push nut and rotate and cause the back relieving mechanism to discharge in advance.Be rotated counterclockwise the propelling movement nut, push rod pushes away before driving hairspring pipe, dowel bushing, 5 pins, can realize the steady release of back relieving mechanism.
5, under the locking state, when the system of broadcasting pushes blood vessel and bends, the elasticity recoverable deformation that the thickness stainless steel tube all is converted to thickness stainless steel spring pipe because of the crooked axial tension that produces and pressure, and the junction stress of having avoided the junction of five-pointed star and bulky spring pipe and dowel bushing and thin stainless steel tube is excessive and come off, and has also avoided the not yielding of core pipe integral body.
6, mechanism is simple, and is easy to operate, safe in utilization, effectively avoided the phenomenon that discharges and can not discharge in advance.
Description of drawings
Fig. 1 is the described entire system structural representation of broadcasting;
Fig. 2 is a back relieving mechanism sketch map;
Fig. 3 (a) and Fig. 3 (b) be respectively the back relieving mechanism in the five-pointed star connector partly cut open figure and vertical view;
Fig. 4 is big handle arrangement sketch map;
Fig. 5 is the miniature lever structural representation;
Fig. 6 (a) is when broadcasting system works, and intravascular stent tightens up the sketch map of state;
Fig. 6 (b) is when broadcasting system works, and intravascular stent is released the sketch map of state;
Fig. 6 (c) when broadcasting system works, the sketch map of intravascular stent release conditions.
Number in the figure:
The 1-seal wire; 2-orientation direction head; Relieving mechanism behind the 3-; 4-core pipe; Manage among the 5-; 6-epitheca pipe;
The big hands handle of 7-; 8-prolongs pipe; The 9-sealing ring; Manage among the 10-; The 11-miniature lever; The 12-lock-screw;
The 13-push rod; The 14-nut; 15-pushes nut; The 17-dowel bushing; 18-five-pointed star connector; The 19-pin;
20-bulky spring pipe; 21-hairspring pipe; 22-handle body; 23-trunk support; The 24-groove.
The specific embodiment
The invention provides a kind of trunk support and broadcast system, the present invention will be further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, this relaxation system is made up of orientation direction head 2, back relieving mechanism 3, core pipe 4, middle pipe 5, epitheca pipe 6, big handle 7, miniature lever 11 and push rod more than 13 parts from front to back.
Wherein, as shown in Figures 2 and 3, described back relieving mechanism 2 is made up of dowel bushing 17 that has central through hole and five-pointed star connector 18, and the front end of dowel bushing 17 is connected with described orientation direction head 2 by screw thread; Five-pointed star connector 18 is 5 pin holes of uniform distribution along the circumferential direction, along the circumferential direction evenly fixing and described pin hole 5 pins 19 one to one on the dowel bushing 17; Bulky spring pipe 20 and hairspring pipe 21 that described core pipe 4 is a spring by two front ends are formed, and hairspring pipe 21 is positioned at bulky spring pipe 20; Fixedly connected with the front end of bulky spring pipe 20 by the central through hole inwall of five-pointed star connector 18 in back relieving mechanism 2 rear ends, the front end of hairspring pipe 21 passes bulky spring pipe 20 fixedlys connected with the central through hole inwall of dowel bushing 17; Described hairspring pipe 21 can drive dowel bushing 17 and pin 19 moves back and forth in the pin-and-hole of five-pointed star connector 18; The middle part of five-pointed star connector 18 is provided with groove 24, makes 5 naked ends of trunk support to embed wherein, and 5 pins that are inserted into pin-and-hole are limited in the groove, realizes restriction and release to the naked end of trunk support.
Outside the pipe 5, fixedlyed connected with big handle 7 in the rear end during described epitheca pipe 6 was set in; Front end at epitheca pipe 6 is provided with Pt/Ir metal development ring, shows the definite position that the system that broadcasts arrives in vivo in operation process.
As shown in Figure 4, described big handle 7 inner slotted holes for the front and back perforation, stretch out a tubule on the sidewall of posterior segment and be connected, thereby liquid can and prolong between the endoporus inflow epitheca pipe 6 and middle pipe 5 of the big handle 7 of pipe 8 inflows by three-way connector with the prolongation pipe 8 that has three-way connector; Big handle 7 rear ends are provided with silica gel sealing ring 9 and screw nut 14, by screwing nut 14 crush seal circles 9, thereby pipe 5 in compressing, reach fixing in the effect of pipe and sealing;
As shown in Figure 5, the front end of described miniature lever 11 is connected and fixed by handle body and middle pipe 5, and the rear end is connected and fixed by the rear end of push rod 13 with hairspring pipe 21; Miniature lever 11 terminal mouth of pipe places are provided with and push nut 15 and lock-screw 12, adopt threaded engagement between described push rod 13 and the propelling movement nut 15.
Described orientation direction head 2 is made by medical plastic PEBAX, and hardness is 30D, smooth in appearance; Described dowel bushing 17 and five-pointed star connector 18 are made by high rigidity medical plastic POM; Described pin 19 is made by the ti-ni shape memory alloy silk; The pipe that described epitheca pipe 6 combines for the three-layer-material extruding, skin is the PEBAX medical plastic, the netted reinforcing rib that the centre is woven into for the rustless steel flat filament, internal layer is PTFE, and inner surface is smooth, and overall wall thickness is 0.2mm; Described core pipe 4 is a stainless steel, selects medical grade 316 rustless steels for use; Pipe 5 is made by medical plastic PU in described, and hardness is 50D; The material of described miniature lever 11 is for comprising medical plastic PVC.
When using this relaxation system, press following procedure operation:
(1) before the art, 5 naked ends of trunk support 23 can be embedded the annular groove 24 interior and propelling movement nuts 15 that turn clockwise of five-pointed star connector 18, make push rod 13 drive hairspring pipe 21,19 recession of 17,5 pins of dowel bushing, after pinning 5 naked ends of trunk support 23, screw lock- screw 12,5 naked ends of support are limited in the groove by 5 pins.To fill in the epitheca pipe 6 after 23 compressions of trunk support, the support assembling finishes, shown in Fig. 6 (a).
(2) seal wire 1 is inserted blood vessel to correct position.
(3) the trunk system that broadcasts that will install support inserts blood vessel to correct position along seal wire.
(4) unscrew nut 14, hold miniature lever 11 motionless (manage 5 in this moment, core pipe 4, back relieving mechanism 3, orientation direction head 2 and trunk support all motionless), drop back and move after big handle 7 drives epitheca pipe 6, the support that is compressed in the epitheca pipe is discharged step by step, the naked end of support this moment still is restricted in the relieving mechanism 3 of back, shown in Fig. 6 (b).
(5) in blood vessel trimming rack to correct position.
(6) it is motionless to hold miniature lever 11, spin off lock-screw 12, be rotated counterclockwise and push nut 15, push rod drives hairspring pipe, dowel bushing, 5 pin reaches, pin is withdrawn from from the pin hole of five-pointed star, and 5 naked ends of support eject in the annular groove 24 of five-pointed star connector 18 because of self elasticity.So far, support is discharged fully, shown in Fig. 6 (c).
(7) it is motionless to hold big handle 7, and recession miniature lever 11 manages 5, core pipe 4, back relieving mechanism 3, orientation direction head 2 be recycled in the epitheca pipe 6 together in the drive.
(8) locking nut 4.
(9) hold big handle 7, the whole system that broadcasts is withdrawn from blood vessel along seal wire, operation is finished.
Claims (7)
1. a trunk support is broadcasted system, is made up of orientation direction head (2), back relieving mechanism (3), core pipe (4), middle pipe (5), epitheca pipe (6), big handle (7), miniature lever (11) and several parts of push rod (13) from front to back, it is characterized in that,
Described back relieving mechanism (2) is made up of dowel bushing that has central through hole (17) and five-pointed star connector (18), and the front end of dowel bushing (17) is connected with described orientation direction head (2) by screw thread; Five-pointed star connector (18) is 5 pin holes of uniform distribution along the circumferential direction, along the circumferential direction evenly fixing and described pin hole 5 pins (19) one to one on the dowel bushing (17); Bulky spring pipe (20) and hairspring pipe (21) that described core pipe (4) is a spring by two front ends are formed, and hairspring pipe (21) is positioned at bulky spring pipe (20); Fixedly connected with the front end of bulky spring pipe (20) by the central through hole inwall of five-pointed star connector (18) in back relieving mechanism (2) rear end, the front end of hairspring pipe (21) passes bulky spring pipe (20) fixedlys connected with the central through hole inwall of dowel bushing (17); Described hairspring pipe (21) can drive dowel bushing (17) and pin (19) moves back and forth in the pin-and-hole of five-pointed star connector (18); The middle part of five-pointed star connector (18) is provided with groove (24), makes 5 naked ends of trunk support to embed wherein, and 5 pins that are inserted into pin-and-hole are limited in the groove, realizes restriction and release to the naked end of trunk support;
The rear end of pipe (5) and described bulky spring pipe (20) is by being threaded or heat seal is connected in described, and extends back and pass epitheca pipe (6), handle (7) greatly successively, stretches into miniature lever (11) internal fixation;
Described epitheca pipe (6) is set in outside the middle pipe (5), fixedlys connected with big handle (7) in the rear end; Front end at epitheca pipe (6) is provided with Pt/Ir metal development ring, shows the definite position that the system that broadcasts arrives in vivo in operation process;
The inner slotted hole of described big handle (7) for the front and back perforation, stretch out a tubule on the sidewall of posterior segment and be connected with the prolongation pipe (8) that has three-way connector, liquid can be by three-way connector and prolong that pipe (8) flows into big handle (7) thus endoporus flow between epitheca pipe (6) and the middle pipe (5); Big handle (7) rear end is provided with silica gel sealing ring (9) and screws nut (14), by screwing nut (14) crush seal circle (9), thereby compresses middle pipe (5), reach fixing in pipe and the effect that seals;
The front end of described miniature lever (11) is connected and fixed by handle body and middle pipe (5), and the rear end is connected and fixed by the rear end of push rod (13) with hairspring pipe (21); The terminal mouth of pipe of miniature lever (11) place is provided with and pushes nut (15) and lock-screw (12), adopts threaded engagement between described push rod (13) and the propelling movement nut (15).
2. a kind of trunk support according to claim 1 is broadcasted system, it is characterized in that described orientation direction head (2) is made by the medical plastic that comprises PEBAX, PE, PU, PEEK, PP, hardness is 20～50D, smooth in appearance is used for system is imported in the blood vessel.
3. a kind of trunk support according to claim 1 is broadcasted system, it is characterized in that, described dowel bushing (17) and five-pointed star connector (18) are made by high rigidity POM, PEBAX medical plastic or rustless steel, and described pin (19) is made by stainless steel silk or ti-ni shape memory alloy silk.
4. a kind of trunk support according to claim 1 is broadcasted system, it is characterized in that, the pipe that described epitheca pipe (6) combines for the three-layer-material extruding, skin is the PEBAX medical plastic, the netted reinforcing rib that the centre is woven into for the rustless steel flat filament, internal layer is PTFE, and inner surface is smooth, and overall wall thickness is 0.1～0.3mm.
5. a kind of trunk support according to claim 1 is broadcasted system, it is characterized in that, described core pipe (4) is a stainless steel, selects medical grade 304,316 or 316L rustless steel for use.
6. a kind of trunk support according to claim 1 is broadcasted system, it is characterized in that, described middle pipe (5) is made by the medical plastic that comprises PEBAX, PE, PU, PEEK, PP, and hardness is 30～70D.
7. a kind of trunk support according to claim 1 is broadcasted system, it is characterized in that, the material of described miniature lever (11) is the medical plastic that comprises POM, PVC, PP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106086968A CN102038565B (en) | 2010-12-17 | 2010-12-17 | Great vascular stent delivery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106086968A CN102038565B (en) | 2010-12-17 | 2010-12-17 | Great vascular stent delivery system |
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| CN102038565A true CN102038565A (en) | 2011-05-04 |
| CN102038565B CN102038565B (en) | 2013-08-14 |
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| WO2013026419A1 (en) * | 2011-08-25 | 2013-02-28 | 上海微创医疗器械（集团）有限公司 | Stent delivery device |
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