FR2660851A1 - Dispositif de desobstruction de conduits vasculaires tels des arteres. - Google Patents
Dispositif de desobstruction de conduits vasculaires tels des arteres. Download PDFInfo
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- FR2660851A1 FR2660851A1 FR9004964A FR9004964A FR2660851A1 FR 2660851 A1 FR2660851 A1 FR 2660851A1 FR 9004964 A FR9004964 A FR 9004964A FR 9004964 A FR9004964 A FR 9004964A FR 2660851 A1 FR2660851 A1 FR 2660851A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
- A61B17/320758—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions with a rotating cutting instrument, e.g. motor driven
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Vascular Medicine (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
L'invention se rapporte à un dispositif (1) de désobstruction de conduits vasculaires tels des artères, lequel dispositif comprend: - au moins un outil (3) de type rotatif doté d'au moins une arête de coupe (4), - au moins un moyen moteur (5) générant au moins indirectement un mouvement d'actionnement de l'outil (3) précité, - au moins un organe flexible (6), dit de transmission, ce dispositif étant caractérisé en ce qu'au lieu de consister en un moyen moteur d'entraînement en rotation continue de l'outil dans un sens déterminé, le moyen moteur (5) comprend un moyen d'entraînement de l'outil en rotation alternative selon, d'une part, au moins deux amplitudes angulaires prédéterminées de sens opposés, et, d'autre part, au moins deux vitesses angulaires également prédéterminées et de signes opposés.
Description
L'invention se rapporte à un dispositif de désobstruction de conduits vasculaires tels des artères.
Tel que cela est connu, les parois de certains conduits vasculaires peuvent se charger de dépôts dits plaques d'athérome qui, notanrent, engendrent l'obstruction de ces conduits.
Pour remédier à l'obstruction de vaisseaux, il est connu de prélever récaniquement ces dépôts athéromateux au moyen d'un outil introduit par le biais d'un cathéter au niveau du site à traiter.
Ces outils sont classiquement animés d'un mouvement rotatif continu dans un sens donne et ont leur partie active sensiblement conçue comme celle d'une fraise d'usinage.
Généralement, les dépôts athéromateux précités sont calcifiés et donc tres durs ce qui implique l'utilisation de fraises diamentées entraînées en rotation à plusieurs milliers de tours par minute.
On reproche aux dispositifs de désobstruction ainsi constitues d'être trop agressifs vis à vis des parois des vaisseaux traites qu'en outre, ils sollicitent trop énergiquement en torsion, ce qui est néfaste compte tenu de la relative fragilité ce type de sollicitations mécaniques de ces parois altérées.
De plus, avec ce type de dispositif de désobstruction, on contrôle mal la trajectoire de l'outil dans le conduit vasculaire, lequel outil peut tendre à perforer la paroi vasculaire.
Un résultat que l'invention vise à obtenir est un dispositif de désobstruction de conduits vasculaires qui rerédi e aux inconvénients précités.
A cet effet, l'invention a pour objet un dispositif du type précité notamment caractérisé en ce qu'au lieu de consister en un moyen moteur d'entraînement en rotation continue de l'outil dans un sens déterminé, le woyen moteur comprend un moyen d'entraînement de l'outil en rotation alternative selon, d'une part, au moins deux amplitudes angulaires prédéterminées de sens opposes, et, d'autre part, au moins deux vitesses angulaires salement prédéterminées et de signes opposés.
L invention sera bien comprise à l'aide de la description ci-aprés faite à titre d'exemple non limitatif en regard du dessin ci-annexe qui représente schématiquement
- figure 1 : le dispositif de l'invention vue en coupe longitudinale,
- figure 2 : à plus grande échelle, une vue selon F de la figure 1.
- figure 1 : le dispositif de l'invention vue en coupe longitudinale,
- figure 2 : à plus grande échelle, une vue selon F de la figure 1.
En se reportant au dessin, on voit un dispositif 1 de désobstruction de conduits vasculaires 2 tels des artères.
Le dispositif comprend
- au moins un outil 3 de type rotatif doté d'au moins une arête de coupe 4,
- au moins un moyen moteur 5 générant au moins indirectement un mouvement d'actionnement de l'outil 3 précité,
- au moins un organe flexible 6, dit de transmission, et dont l'une 7 des extrémités 7, 8 est accouplée à l'outil 3 tandis que l'autre extrémité 8 est accouplée au moyen 5 moteur.
- au moins un outil 3 de type rotatif doté d'au moins une arête de coupe 4,
- au moins un moyen moteur 5 générant au moins indirectement un mouvement d'actionnement de l'outil 3 précité,
- au moins un organe flexible 6, dit de transmission, et dont l'une 7 des extrémités 7, 8 est accouplée à l'outil 3 tandis que l'autre extrémité 8 est accouplée au moyen 5 moteur.
Selon l'invention, au lieu de consister en un moyen moteur d'entraînement en rotation continue de l'outil dans un sens déterminé, le moyen 5 moteur comprend un moyen d'entraînement de l'outil en rotation alternative selon, d'une part, au moins deux amplitudes angulaires prédéterminées de sens opposes, et, d'autre part, au moi nus deux vitesses angulaires également prédéterminées et de signes opposés.
De préférence, le moyen moteur comprend des organes de réglage des valeurs des amplitudes et des vitesses angulaires précitées.
Les deux amplitudes angulaires sont, par exemple, identiques et de l'ordre de cent vingts degrés.
Par exemple, le moyen moteur 5 imprime à l'outil un mouvement de l'ordre de cinquante alternances par secondes.
Conforément à l'invention, l'outil rotatif 3 utilisé comprend au foins deux arêtes 4 de coupe, chacune active dans l'un des deux sens de rotation.
De manière connue, l'organe de transmission 6 est logé dans un tube souple 9 dit cathéter.
Selon l'invention, ve l'outil comprend au moins une face frontale 10 dans laquelle, notamment en partie centrale, débouche au moins un premier canal 11 qui s'étend par ailleurs tout au long de l'outil et se prolonge lla dans l'organe de transmission sensiblement jusqu'à son extrémité 8 accouplée au moyen moteur 5 et, d'autre part, au moins une face dorsale 12 entre laquelle et la face extrême 13, en vis à vis d'un cathéter qui loge l'organe d'entraînement, subsiste un passage 14 relié à un second canal 15 qui s'étend quant à lui longitudinalement au cathéter et ce sensibleirent jusqu'à son extrémité libre voisine du moyen 5 moteur.
L'un 11 de ces canaux 11, 15 est relie à un moyen 16 d'injection de fluide tandis que l'autre 15 est relié à un moyen 17 d'aspiration de fluide.
Confor-éri ent l'invention, c'est le canal 11 débouchant dans la face frontale 10 de l'outil qui est relié au moyen 16 d'injection de fluide tandis que le canal 15 débouchant par le passage 14 au droit de la face dorsale 12 de cet outil est relié au moyen 17 d'aspiration de fluide.
D'une part, l'outil comporte un corps 18 globalement cylindrique de révolution et ce corps 18 porte des parties actives minces 19 telles des lames présentant chacune, en saillie, par rapport au dit corps 18 au moins une arête de coupe 4 et, d'autre part, au moins certaines de ces arêtes s'étendent sensiblement parallélement à l'enveloppe du corps cylindrique depuis le bord périphérique de la face dorsale 12 de l'outil jusque dans le plan de la face frontale 10 de cet outil.
De préférence, chaque lame 19 s'étend dans un plan sensiblement radial au corps cylindrique de l'outil et présente au droit de la paroi cylindrique de cet outil, deux arêtes 4 qui, situées de part et d'autre d'un plan médian à la lame, convergent vers ce plan médian et ce, depuis la face frontale 10 de l'outil vers la surface dorsale 12.
Ces fores permettent d'optimiser le décolmatage des lames de l'outil.
Conformément à l'invention, au moins certaines des parties actives 19 de l'outil comportent une face extrême 20 sensiblernent radiale et située au niveau de la face frontale 10 de l'outil avec dans cette face extrême au moins une rainure 21 qui s'étend sensiblement parallèlement aux flancs 22 de la lame qui constitue la partie active considérée.
Le dispositif de l'invention permet de remédier aux inconvénients des dispositifs animés d'un mouvement rotatif continu dans un sens déterminé.
Précisément, il obvie à un échauffement notable induit au droit des parois vasculaires par les dispositifs connus.
Egalement, il permet l'élimination des particules de la plaque d'athérome détachées par l'outil.
De plus, l'alternance de mouvements de l'outil est moins agressive pour les conduits vasculaires que le mouvement rotatif continu des dispositifs connus.
Eventuellement, l'outil porte sur sa face frontale 10 au moins une excroissance centrale 23 qui constitue un nez de centrage dans un éventuel canal 24 pouvant subsister au centre du conduit vasculaire à traiter.
Le cathéter porte l'outil au moins par le biais d'un moyen 25 de guidage en rotation qui comporte au moins un passage 26 en vue d'assurer la continuité du conduit 15 débouchant à l'extrémité du cathéter 9 voisine de l'outil.
Claims (9)
1. Dispositif (1) de désobstruction de conduits vasculaires (2) tels des artères, lequel dispositif comprend
- au moins un outil (3) de type rotatif doté d'au moins une arête de coupe (4),
- au moins un moyen moteur (5) générant au moins indirectement un mouvement d'actionnement de l'outil (3) précité,
- au moins un organe flexible (6), dit de transmission, et dont l'une (7) des extrémités (7, 8) est accouplée à l'outil (3) tandis que l'autre extrémité (8) est accouplée au moyen moteur (5),
ce dispositif étant CARACTERISE en ce qu'au lieu de consister en un moyen moteur d'entraînement en rotation continue de l'outil dans un sens déterminé, le moyen moteur (5) comprend un moyen d'entraînement de # l'outil en rot rotation alternative selon, d'une part, au moins deux amplitudes angulaires prédéterminées de sens opposés, et, d'autre part, au moins deux vitesses angulaires également prédéterminées et de signes opposés.
2. Dispositif selon la revendication 1 caractérisé en ce que l'outil rotatif (3) utilisé comprend au moins deux arêtes (4) de coupe, chacune active dans l'un des deux sens de rotation.
3. Dispositif selon la revendication 1 ou 2 caractérisé en ce que l'outil comprend au moins une face frontale (10) dans laquelle, notamment en partie centrale, débouche au moins un premier canal (11) qui s'étend par ailleurs tout au long de l'outil et se prolonge (lla) dans l'organe de transmission sensiblement jusqu'à son extrémité (8) accouplée au moyen moteur (5) et, d'autre part, au moins une face dorsale (12) entre laquelle et la face extrême (13), en vis à vis d'un cathéter qui loge l'organe d'entraînement, subsiste un passage (14) relié à un second canal (15) qui s'étend quant à lui longitudinalement au cathéter et ce sensiblement jusqu'à son extrémité libre voisine du moyen moteur (5).
4. Dispositif selon la revendication 3 caractérisé en ce que l'un (11) des canaux (11, 15) est relié à un moyen (16) d'injection de fluide tandis que l'autre (15) est relié à un moyen (17) d'aspiration de fluide.
5. Dispositif selon la revendication 4 ou 5 caractérisé en ce que c'est le canal (11) débouchant dans la face frontale (10) de l'outil qui est relié au moyen (16) d'injection de fluide tandis que le canal (15) débouchant par le passage (14) au droit de la face dorsale (12) de cet outil est relié au moyen (17) d'aspiration de fluide.
6. Dispositif selon l'une quelconque des revendications 7 à 5 caractérisé en ce que d'une part, l'outil comporte un corps (18) globalement cylindrique de révolution et ce corps (18) porte des parties actives minces (19) telles des lames présentant chacune, en saillie, par rapport au dit corps (18) au moins une arête de coupe (4) et, d'autre part, au moins certaines de ces arêtes s'étendent sensiblement parallèlement à l'enveloppe du corps cylindrique depuis le bord périphérique de la face dorsale (12) de l'outil jusque dans le plan de la face frontale (10) de cet outil.
7. Dispositif selon la revendication 6 caractérisé en ce qu'au moins certaines des parties actives (19) de l'outil comportent une face extrême (20) sensiblement radiale et située au niveau de la a face frontale (10) de l'outil avec dans cette face extrême au moins une rainure (21) qui s'étend sensiblement parallèlement aux flancs (22) de la lame qui constitue la partie active considérée.
8. Dispositif selon l'une quelconque des revendications 1 à 7 caractérisé en ce que le cathéter porte l'outil au moins par le biais d'un moyen (25) de guidage en rotation qui comporte au moins un passage (26) en vue d'assurer la continuité du conduit (15) débouchant à l'extrémité du cathéter (9) voisine de l'outil.
9. Dispositif selon l'une quelconque des revendications 1 à 8 caractérisé en ce que l'outil porte sur sa face frontale (10) au moins une excroissance centrale (23) qui constitue un nez de centrage dans un éventuel canal (24) pouvant subsister au centre du conduit vasculaire à traiter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9004964A FR2660851A1 (fr) | 1990-04-11 | 1990-04-11 | Dispositif de desobstruction de conduits vasculaires tels des arteres. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9004964A FR2660851A1 (fr) | 1990-04-11 | 1990-04-11 | Dispositif de desobstruction de conduits vasculaires tels des arteres. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2660851A1 true FR2660851A1 (fr) | 1991-10-18 |
Family
ID=9395863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9004964A Withdrawn FR2660851A1 (fr) | 1990-04-11 | 1990-04-11 | Dispositif de desobstruction de conduits vasculaires tels des arteres. |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2660851A1 (fr) |
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