CA2555966A1 - Catheter for sucking, fragmenting and removing material extractable from blood vessels - Google Patents

Catheter for sucking, fragmenting and removing material extractable from blood vessels Download PDF

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Publication number
CA2555966A1
CA2555966A1 CA002555966A CA2555966A CA2555966A1 CA 2555966 A1 CA2555966 A1 CA 2555966A1 CA 002555966 A CA002555966 A CA 002555966A CA 2555966 A CA2555966 A CA 2555966A CA 2555966 A1 CA2555966 A1 CA 2555966A1
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CA
Canada
Prior art keywords
working head
catheter
transport screw
opening
cutting tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002555966A
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French (fr)
Other versions
CA2555966C (en
Inventor
Immanuel Straub
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Straub Medical AG
Original Assignee
Straub Medical Ag
Immanuel Straub
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Straub Medical Ag, Immanuel Straub filed Critical Straub Medical Ag
Publication of CA2555966A1 publication Critical patent/CA2555966A1/en
Application granted granted Critical
Publication of CA2555966C publication Critical patent/CA2555966C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • A61B17/320783—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions through side-hole, e.g. sliding or rotating cutter inside catheter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00681—Aspects not otherwise provided for
    • A61B2017/00685—Archimedes screw

Abstract

The invention relates to a catheter for sucking, fragmenting and removing material extractable from hollow bodies, in particular thromboses and embolic bodies from human blood vessels. The inventive catheter comprises a working head (11) which is displaceable along a guide wire (6) independently thereof, is disposed on a distal end of the catheter and is provided with at least one lateral opening (14). Said catheter (10) also comprises a flexible feed screw (13) which is rotatable by means of the rotary drive (2) of a drive unit (1) remote from the working head (11), a flexible hose (12) which encompasses the feed screw (13), is connected to the working head (11) and is embodied in such a way that it is possible to remove thromboses and detached embolic fragments and a cutting tool (13), wherein the feed screw (13) is designed in the form of a cutting tool interacting with the opening (14) of the working head (11) for chopping the thromboses and detached embolic bodies between the peripherial edges (13a) of the feed screw (13) and the edges of the opening.

Claims (25)

1. A catheter for the aspiration, fragmentation and removal of removable material from hollow bodies, in particular of thrombi and emboli from blood vessels, comprising a working head (11) which is axially displaceable over a guide wire (6) independently thereof and is arranged at the distal end of the catheter and which has at least one lateral opening (14), the catheter (10) having a flexible transport screw (13) which has a distal and a proximal part and is capable of being rotated by means of a rotary drive (2) of a drive unit (1), which rotary drive is a distance away from the working head (11), and comprising a flexible tube (12) surrounding the transport screw (13), connected to the working head (11) and intended for removing the material or the detached thrombi and emboli fragments, and a cutting tool (13), wherein the transport screw (13) is in the form of a shearing cutting tool cooperating with the opening (14) of the working head (11) for comminuting the penetrating materials or aspirated and/or detached thrombi and emboli between the peripheral borders (13a) of the transport screw (13)
2. A catheter for the aspiration, fragmentation and removal of removable material from hollow bodies, in particular of thrombi and emboli from blood vessels, comprising a distal and a proximal end, a working head (11) which is axially displaceable over a guide wire (6) independently thereof and is arranged at the distal end of the catheter and which has at least one lateral opening (14), the catheter (10) having a flexible transport screw (13) which has a distal and a proximal part, extends from the proximal to the distal end of the catheter and is capable of being rotated by means of a rotary drive (2) of a drive unit (1), which rotary drive is a distance away from the working head (11), the transport screw (13) being provided with transport surfaces which extend helically along its longitudinal axis and in the direction of radii, and comprising a flexible tube (12) surrounding the transport screw (13), connected to the working head (11) and intended for removing the material or the detached thrombi and emboli fragments, and a cutting tool, wherein the transport screw (13) is formed, in the region of the working head (11), as a shearing cutting tool cooperating with the opening (14) of the working head (11), which cutting tool, in the operating state, continuously comminutes the penetrating material or aspirated and/or detached thrombi and emboli between the peripheral borders (13a) of the transport screw (13) and borders of the openings (14) and removes them along the transport surface in the direction of the proximal end (7).
3. A working head on a catheter for the aspiration, fragmentation and removal of removable material from hollow bodies, in particular of thrombi and emboli from blood vessels, which has at least one lateral opening (14), the catheter (10) having a flexible transport screw (13) which has a distal and a proximal part and can be rotated by means of a rotary drive (2) of a drive unit (1), which rotary drive is a distance away from the working head (11), the transport screw (13) being provided with transport surfaces, and a cutting tool, wherein the transport screw (13) is formed, in the region of the working head (11), as a shearing cutting tool which cooperates with the opening (14) of the working head (11) and, in the operating state, continuously comminutes the penetrating materials or aspirated and/or detached thrombi and emboli between the peripheral borders (13a) of the transport screw (13) and borders of the openings (14) and removes them along the transport surface, and wherein the lateral opening (14) of the working head (11) is in the form of an L-shaped slot (14i, 14k, 14l, 14m) having a limb extending substantially in the longitudinal direction and a limb extending along a part of the circumference.
4. The working head as claimed in claim 3, wherein the ratio of the width of the limb extending in the longitudinal direction to the width of the limb extending in the circumferential direction is from 1.0 to 1.3.
5. The catheter or working head as claimed in any of claims 1 to 4, wherein the distal part of the transport screw (13) in the region of the working head (11) is formed so as to be an exact fit in the external diameter relative to the internal diameter of the preferably cylindrical working head (11), so that the external diameter of the transport screw (13) has only minimal diameter play relative to the internal diameter of the inner lateral surface of the working head (11).
6. The catheter or working head as claimed in any of claims 1 to 5, wherein the edges on the outside of the transport screw (13) are formed so as to be sharp in the region of the opening (14) of the working head (11).
7. The catheter or working head as claimed in any of the preceding claims, wherein the working head (11) tapers towards its distal end (8).
8. The catheter or working head as claimed in any of the preceding claims, wherein the edges (15) of the lateral opening (14a) are formed so as to be sharp at least in sections in the region of the inner lateral surface of the working head (11).
9. The catheter or working head as claimed in any of the preceding claims, wherein the edges (15) of the lateral opening (14a) are formed so as to be rounded at least in sections in the region of the outer lateral surface of the working head (11a).
10. The catheter as claimed in any of the preceding claims, wherein the lateral opening (14) is in the form of a slot.
11. The catheter as claimed in claim 10, wherein the slot runs at least partially in the axial direction of the working head (11).
12. The catheter as claimed in claim 10 or 11, wherein the slot (14n, 140, 14p, 14q) is formed, relative to the longitudinal axis of the working head (11n, 11o, 11p, 11q), at least partly along a helix.
13. The catheter or working head as claimed in any of claims 3 to 9 and 11 to 12, wherein the width of the slot (14h) decreases toward the proximal end of the working head (11h).
14. The catheter as claimed in any of claims 10 to 13, wherein the slot (14i, 14k, 14l, 14m) is formed in a L-shape.
15. The catheter or working head as claimed in any of the preceding claims, wherein, in the distal end region of the working head (11b, 11f, 11g, 11q) at least one groove-like recess (19a, 19b, 19c) starting from the distal end and opening in to the lateral opening (14b, 14f, 14g, 14q) is arranged on the outer lateral surface.
16. The catheter or working head as claimed in claim 15, wherein the depth of the groove-like recess (19) increases toward the proximal end of the working head.
17. The catheter or working head as claimed in claim 15 or 16, wherein the width (b) of the groove-like recess (19b) is greater than the chord (s) of the internal diameter of the working head (11f) in the region of the groove base.
18. The catheter or working head as claimed in any of the preceding claims, wherein the working head (11a) is connected to the tube (12) axially in a manner resistant to tension and pressure.
19. The catheter as claimed in any of the preceding claims, wherein the tube (12) has a reinforcement (17) at least in sections.
20. The catheter as claimed in claim 19, wherein the reinforcement (17) is in the form of a metallic helix.
21. The catheter as claimed in claim 19 or 20, wherein the reinforcement (17) is arranged on the inside of the tube (12).
22. The catheter as claimed in any of the abovementioned claims, wherein the tube (12) is formed in two parts, the proximal part being in the form of a plastic tube and the distal part being in the form of a metallic helical spring (17) having a thin-walled elastic plastic sheath (18).
23. The catheter or working head as claimed in any of the abovementioned claims, wherein the working head (11) and/or the transport screw (13) consist of metal, in particular of stainless steel.
24. The catheter or working head as claimed in any of the above mentioned claims, wherein the working head (11) is composed of sintered ceramic or metal ceramic or has a highly resistant layer for protection from wear.
25. The working head for a catheter as claimed in any of the abovementioned claims, according to one of fig. 4 to 80.
CA2555966A 2004-03-04 2005-03-03 Catheter for sucking, fragmenting and removing material extractable from blood vessels Active CA2555966C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CH0369/04 2004-03-04
CH3692004 2004-03-04
CH2176/04 2004-12-22
CH21762004 2004-12-22
PCT/IB2005/000543 WO2005084562A2 (en) 2004-03-04 2005-03-03 Catheter for sucking, fragmenting removing material extractable from blood vessels

Publications (2)

Publication Number Publication Date
CA2555966A1 true CA2555966A1 (en) 2005-09-15
CA2555966C CA2555966C (en) 2012-07-10

Family

ID=34921071

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2555966A Active CA2555966C (en) 2004-03-04 2005-03-03 Catheter for sucking, fragmenting and removing material extractable from blood vessels

Country Status (17)

Country Link
US (2) US7905896B2 (en)
EP (2) EP2014244B1 (en)
JP (3) JP4756030B2 (en)
AT (2) ATE431724T1 (en)
AU (1) AU2005220069B9 (en)
BR (1) BRPI0508305A (en)
CA (1) CA2555966C (en)
DE (1) DE502005007316D1 (en)
ES (2) ES2327652T3 (en)
IL (1) IL177443A (en)
MX (2) MXPA06009975A (en)
NO (1) NO337278B1 (en)
PL (2) PL2014244T3 (en)
RU (1) RU2369345C2 (en)
TW (1) TW200539837A (en)
WO (1) WO2005084562A2 (en)
ZA (1) ZA200606629B (en)

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AU2005220069A1 (en) 2005-09-15
JP2007530098A (en) 2007-11-01
ES2327652T3 (en) 2009-11-02
IL177443A0 (en) 2006-12-31
ATE431724T1 (en) 2009-06-15
ZA200606629B (en) 2007-12-27
NO20063918L (en) 2006-09-01
MXPA06009975A (en) 2007-05-21
DE502005007316D1 (en) 2009-07-02
US20070219484A1 (en) 2007-09-20
AU2005220069B2 (en) 2011-04-21
WO2005084562A3 (en) 2007-08-16
MX2009004020A (en) 2009-04-27
US20110160758A1 (en) 2011-06-30
AU2005220069B9 (en) 2011-05-12
US7905896B2 (en) 2011-03-15
BRPI0508305A (en) 2007-07-31
RU2369345C2 (en) 2009-10-10
PL2014244T3 (en) 2012-03-30
CA2555966C (en) 2012-07-10
ATE530128T1 (en) 2011-11-15
EP2014244B1 (en) 2011-10-26
US8114106B2 (en) 2012-02-14
EP1722694A2 (en) 2006-11-22
JP2011156375A (en) 2011-08-18
IL177443A (en) 2011-06-30
ES2376285T3 (en) 2012-03-12
TW200539837A (en) 2005-12-16
JP4756030B2 (en) 2011-08-24
PL1722694T3 (en) 2010-01-29
RU2006134975A (en) 2008-04-10
WO2005084562A2 (en) 2005-09-15
EP1722694B1 (en) 2009-05-20
JP2014158798A (en) 2014-09-04
EP2014244A1 (en) 2009-01-14
NO337278B1 (en) 2016-02-29

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