CA2378923A1 - Rotational and translational drive coupling for catheter assembly - Google Patents

Rotational and translational drive coupling for catheter assembly Download PDF

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Publication number
CA2378923A1
CA2378923A1 CA002378923A CA2378923A CA2378923A1 CA 2378923 A1 CA2378923 A1 CA 2378923A1 CA 002378923 A CA002378923 A CA 002378923A CA 2378923 A CA2378923 A CA 2378923A CA 2378923 A1 CA2378923 A1 CA 2378923A1
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CA
Canada
Prior art keywords
drive
longitudinal
rotary
rotary drive
termination
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
CA002378923A
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French (fr)
Other versions
CA2378923C (en
Inventor
W. Martin Belef
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Boston Scientific Ltd Barbados
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Individual
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Filing date
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Publication of CA2378923A1 publication Critical patent/CA2378923A1/en
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Publication of CA2378923C publication Critical patent/CA2378923C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A61B17/320758—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions with a rotating cutting instrument, e.g. motor driven
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/12—Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
    • A61B8/4444—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to the probe
    • A61B8/4461—Features of the scanning mechanism, e.g. for moving the transducer within the housing of the probe
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B2017/22072—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an instrument channel, e.g. for replacing one instrument by the other
    • A61B2017/22074—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an instrument channel, e.g. for replacing one instrument by the other the instrument being only slidable in a channel, e.g. advancing optical fibre through a channel
    • A61B2017/22075—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an instrument channel, e.g. for replacing one instrument by the other the instrument being only slidable in a channel, e.g. advancing optical fibre through a channel with motorized advancing or retracting means

Abstract

A catheter assembly (10) is provided with a rotational and translational drive coupling (26) and an insertion section (14), which includes a sheath (16) and a core (18) slidably housed within the sheath. The drive coupling (26) includes an elongate rotary drive element (36), defining a first longitudinal drive path, mounted for rotation about a longitudinal axis (42). A termination element (44) is mounted to the proximal end of the core (18) and slides along the first longitudinal drive path but rotates with the rotary drive element (36). A bearing (46) has an inner race (48) secured to the termination member and an outer race (50) coupled to the longitudinal drive element (54, 62) of a longitudinal driver (56). Rotation of the rotary drive element (36) rotates the termination element (44) and the proximal end of the core (18) therewith about the longitudinal axis (42). Longitudinal movement of the longitudinal drive element (54, 62) translates the bearing (46) parallel to the longitudinal drive path; this causes the termination element (44) and the proximal end of the core (18) therewith to be translated along the first longitudinal drive path, the translational and rotational movements being independent of one another.

Claims (24)

1. A. rotational and translational drive coupling for moving an inner member of a catheter comprising:
a housing:
an elongate rotary drive element, comprising a first longitudinal drive path, mounted to the housing for rotation about a longitudinal axis;
an inner catheter member termination element mounted to the rotary drive element for:
longitudinal movement, relative to the rotary drive element, along the first longitudinal drive path; and rotary motion with the rotary drive element;
a bearing having a first part coupled to the termination member and a second part, said first and second parts freely rotatable relative to one another in at least one rotary direction; and a longitudinal driver, mounted to the housing, having a longitudinal drive element coupled to the second part of the bearing and movable along a second longitudinal drive path;
whereby rotation of the rotary drive element rotates the termination element about the longitudinal axis, and longitudinal movement of the longitudinal drive element translates the bearing parallel to the second longitudinal drive path, which in turn translates the termination element along the first longitudinal drive path.
2. The drive coupling according to claim 1 wherein the housing at least substantially totally encloses the rotary drive element.
3. The drive coupling according to claim 1 wherein the rotary drive element has a hollow interior defining the first longitudinal drive path.
4. The drive coupling according to claim 3 wherein the rotary drive element has first and second ends and a dual data/signal-rotary drive connector at the first end.
5. The drive coupling according to claim 4 further comprising a flexible data/signal line extending between the termination element and the dual connector.
6. The drive coupling according to claim 5 wherein the data/signal line extends from the termination element, towards the second end of the rotary drive element and then back towards the dual connector at the first end of the rotary drive element.
7. The drive coupling according to claim 3 wherein the rotary drive element has a slot opening into said hollow interior parallel to the first longitudinal drive path.
8. The drive coupling according to claim 7 wherein said first part of the bearing is coupled to the termination member by a connector extending through the slot.
9. The drive coupling according to claim 1 wherein the longitudinal drive element comprises a continuous belt.
10. The drive coupling according to claim 9 wherein the longitudinal driver comprises an idler pulley, a drive pulley and a bevel gear drive, the continuous belt engaging the idler and drive pulleys, the bevel gear drive including a first bevel gear directly driving the drive pulley.
11. The drive coupling according to claim 1 wherein the rotary drive element comprises a first rotary drive input and the longitudinal driver comprises a second rotary drive input, said longitudinal driver comprising a drive train coupling the second rotary drive input to the longitudinal drive element.
12. The drive coupling according to claim 11 wherein said drive train comprises first and second bevel gears.
13. The drive coupling according to claim 12 wherein the drive train comprises a drive pulley driven by the second bevel gear and the longitudinal drive element comprises an endless belt engaging the drive pulley.
14. A rotational and translational drive coupling for moving an inner member of a catheter comprising:
a housing:
an elongate rotary drive element, having a hollow interior defining a first longitudinal drive path, mounted within the housing for rotation about a longitudinal axis;
an inner catheter member termination element mounted to the rotary drive element for:
longitudinal movement, relative to the rotary drive element, along the first longitudinal drive path; and rotary motion with the rotary drive element;
the rotary drive element having first and second ends and a dual data/signal-rotary drive connector at the first end;
a flexible data/signal line extending between the termination element and the dual connector, the data/signal line extending from the termination element, towards the second end of the rotary drive element and then back towards the dual connector at the first end of the rotary drive element;
a bearing having a first part coupled to the termination member and a second part, said first and second parts freely rotatable relative to one another;
a longitudinal driver, mounted to the housing, having a longitudinal drive element coupled to the second pan of the bearing and movable along a second longitudinal drive path; and the rotary drive element having a slot opening into said hollow interior parallel to the first longitudinal drive path, said first part of the bearing being coupled to the termination member by a connector extending through the slot;
whereby rotation of the rotary drive element rotates the termination element about the longitudinal axis, and longitudinal movement of the longitudinal drive element translates the bearing parallel to the second longitudinal drive path, which in turn translates the termination element along the first longitudinal drive path.
15. The drive coupling according to claim 14 wherein:
the longitudinal drive element comprises a continuous belt; and the longitudinal driver comprises an idler pulley, a drive pulley and bevel gear drive, the continuous belt engaging the idler and drive pulleys, the bevel gear drive including a first bevel gear directly driving the drive pulley.
16. A driven catheter assembly comprising:
a motor drive unit comprising first and second rotary drive outputs;
a catheter assembly comprising:;
a rotational and translational drive coupling comprising:
a housing:
first and second rotary drive inputs supported by the housing and drivenly coupled to the first and second rotary drive outputs;
a catheter comprising an outer sheath on an inner member movably housed within the sheath, the outer member extending from the housing means for drivingly coupling the inner member to the first and second rotary drive inputs so that rotation of the first and second rotary drive outputs rotates and translate the inner member, respectively.
17. The catheter system according to claim 16 wherein the motor drive unit comprises first and second drive trains each having driving and driven ends, said driving ends terminating at the first and second rotary drive outputs, respectively.
18. The catheter system according to claim 17 further comprising a drive source at the driven end of the second drive train, a clutch-type element along the second drive train between the drive source and the second rotary drive output, and a movement indicator along the second drive train between the clutch-type element and the second rotary drive output.
19. The catheter system according to claim 16 further comprising a flexible, drapeable sterile wrap enclosing the motor drive unit, said first and second rotary drive outputs and inputs comprising bag-piercing drive elements which effectively pierce said sterile wrap when said first and second rotary drive outputs and inputs engage.
20. A method for using a driven catheter system comprising;
selecting a catheter assembly, the catheter assembly comprising a rotatable and translatable drive coupling from which a catheter extends, the catheter comprising a sheath housing a rotatable and translatable core, the core having a proximal end and a distal end;
mounting first and second drive inputs and a first data/signal connector of the drive coupling to first and second drive outputs and a second data/signal connector of a motor drive unit, the motor drive unit comprising first and second drive motors which rotate the first and second drive outputs causing the first and second drive inputs to rotate;
operating the first drive motor which rotates a rotary drive element of the drive coupling about an axis, the proximal end of the core coupled to the rotary drive element to rotate with the rotary drive element thereby causing the proximal end of the core to rotate about the axis and the core to rotate within the sheath;
and operating the second drive motor which drives a longitudinal driver of the drive coupling, the longitudinal driver operably coupling the second drive input to the proximal end of the core so to move the proximal end of the core along the axis relative to the rotary drive element and to translate the core within the sheath, the second drive motor operating step being carried out at least partially simultaneously with the first drive motor operating step.
21. The method according to claim 20 further comprising flushing the catheter of the assembly with a flushing fluid.
22. The method according to claim 20 wherein the first drive input and the first data/signal connector are coaxially mounted to the first drive output and the second data/signal connector during the mounting step.
23. The method according to claim 20 further comprising monitoring the longitudinal position of the distal end of the core relative to the sheath.
24. The method according to claim 23 further comprising the step of decoupling the second drive motor from the longitudinal driver and manually longitudinally moving the proximal end of the core while continuing to monitor the longitudinal position of the distal end of the core relative to the sheath.
CA2378923A 1999-07-30 2000-07-21 Rotational and translational drive coupling for catheter assembly Expired - Lifetime CA2378923C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US14660999P 1999-07-30 1999-07-30
US60/146,609 1999-07-30
PCT/IB2000/001012 WO2001008561A1 (en) 1999-07-30 2000-07-21 Rotational and translational drive coupling for catheter assembly

Publications (2)

Publication Number Publication Date
CA2378923A1 true CA2378923A1 (en) 2001-02-08
CA2378923C CA2378923C (en) 2012-07-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2378923A Expired - Lifetime CA2378923C (en) 1999-07-30 2000-07-21 Rotational and translational drive coupling for catheter assembly

Country Status (8)

Country Link
US (1) US6485482B1 (en)
EP (1) EP1199986B1 (en)
JP (1) JP4624618B2 (en)
AT (1) ATE296578T1 (en)
CA (1) CA2378923C (en)
DE (1) DE60020566T2 (en)
ES (1) ES2242622T3 (en)
WO (1) WO2001008561A1 (en)

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US6485482B1 (en) 2002-11-26
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