CA2379602A1 - Method of operating microsurgical instruments - Google Patents

Method of operating microsurgical instruments Download PDF

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Publication number
CA2379602A1
CA2379602A1 CA002379602A CA2379602A CA2379602A1 CA 2379602 A1 CA2379602 A1 CA 2379602A1 CA 002379602 A CA002379602 A CA 002379602A CA 2379602 A CA2379602 A CA 2379602A CA 2379602 A1 CA2379602 A1 CA 2379602A1
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CA
Canada
Prior art keywords
port
step comprises
open
instrument
cycle rate
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
CA002379602A
Other languages
French (fr)
Other versions
CA2379602C (en
Inventor
Russell L. Finlay
William W. Furniss
John C. Huculak
Christopher C. Jung
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.)
Alcon Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2379602A1 publication Critical patent/CA2379602A1/en
Application granted granted Critical
Publication of CA2379602C publication Critical patent/CA2379602C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
    • A61F9/00763—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments with rotating or reciprocating cutting elements, e.g. concentric cutting needles
    • 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
    • A61B2017/00017—Electrical control of surgical instruments
    • A61B2017/00137—Details of operation mode
    • A61B2017/00154—Details of operation mode pulsed
    • A61B2017/00181—Means for setting or varying the pulse energy
    • A61B2017/0019—Means for setting or varying the pulse width
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00017—Electrical control of surgical instruments
    • A61B2017/00137—Details of operation mode
    • A61B2017/00154—Details of operation mode pulsed
    • A61B2017/00194—Means for setting or varying the repetition rate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00535—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated
    • A61B2017/00544—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated pneumatically

Abstract

A method of operating a microsurgical instrument, such as a vitrectomy probe (10), is disclosed. The probe includes a port (16) for receiving tissue and an inner cutting member (14). A flow of tissue is induced into the port with a vacuum source, and the member is actuated in a cyclic manner to open and clo se the port over a plurality of cut rates. A duty cycle of the member is varied with the cut rate to vary the flow of the tissue into the port. The method yields the ability to adjust flow rate into the probe and aperture of the probe for a given cut rate so as to effectively perform a wide variety of vitreoretinal surgical objectives.

Claims (19)

1. A method of operating a microsurgical instrument, said instrument comprising a port for receiving tissue and a member, comprising the steps of:
inducing a flow of said tissue into said port with a vacuum source;
actuating said member in a cyclic manner to open and close said port over a plurality of cycle rates; and varying a duty cycle of said member with said cycle rate to vary said flow of said tissue into said port.
2. The method of claim 1 wherein said actuating step comprises reciprocating said member along a longitudinal axis of said instrument using a pneumatic source to move said member from an open port position to a closed port position, and a spring to move said member from said closed port position to said open port position.
3. The method of claim 1 wherein said actuating step comprises reciprocating said member around a longitudinal axis of said instrument using a first pneumatic source to move said member from an open port position to a closed port position, and a second pneumatic source to move said member from said closed port position to said open port position.
4. The method of claim 1 wherein:
said actuating step comprises using a valve, an electrical signal that opens and closes said valve, and a pneumatic source coupled to said valve to create a pulsed pneumatic waveform; and said varying step comprises, for a given cycle rate, varying a pulse width of said electrical signal so that a maximum pressure of said pulsed pneumatic waveform is substantially equal to a pressure of said pneumatic waveform at which said member closes said port.
5. The method of claim 4 wherein said varying step comprises decreasing said pulse width with increasing cycle rate.
6. The method of claim 4 wherein said varying step comprises increasing said pulse width with decreasing cycle rate.
7. The method of claim 1 wherein said microsurgical instrument is a vitrectomy probe, said member is an inner cutting member, and said cycle rate is a cut rate.
8. The method of claim 1 wherein said microsurgical instrument is an aspiration probe, and said member is a sealing member.
9. The method of claim 1 wherein said actuating step comprises reciprocating said member along a longitudinal axis of said probe using a linear electrical motor.
10. The method of claim 1 wherein said actuating step comprises reciprocating said member along a longitudinal axis of said probe using a solenoid.
11. The method of claim 1 wherein an open size of said port varies with said cycle rate.
12. The method of claim 1 wherein said actuating step comprises controlling said member with a variable controller operatively coupled to said instrument.
13. The method of claim 12 wherein said variable controller comprises a foot pedal having a generally vertical range of motion.
14. The method of claim 13 wherein moving said foot pedal in a downward direction decreases said cycle rate.
15. The method of claim 14 wherein moving said foot pedal in a downward direction increases an open size of said port.
16. The method of claim 13 wherein moving said foot pedal in an upward direction increases said cycle rate.
17. The method of claim 16 wherein moving said foot pedal in an upward direction decreases an open size of said port.
18. A method of operating a microsurgical instrument, said instrument comprising a port for receiving tissue and a member, comprising the steps of:
inducing a flow of said tissue into said port with a vacuum source; and actuating said member in a cyclic manner to open and close said port over a plurality of cycle rates, wherein an open size of said port varies with said cycle rate.
19. The method of claim 18 wherein said microsurgical instrument is a vitrectomy probe, said member is an inner cutting member, and said cycle rate is a cut rate.
CA2379602A 1999-08-30 2000-06-09 Method of operating microsurgical instruments Expired - Lifetime CA2379602C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/386,003 US6514268B2 (en) 1999-08-30 1999-08-30 Method of operating microsurgical instruments
US09/386,003 1999-08-30
PCT/US2000/015948 WO2001015640A1 (en) 1999-08-30 2000-06-09 Method of operating microsurgical instruments

Publications (2)

Publication Number Publication Date
CA2379602A1 true CA2379602A1 (en) 2001-03-08
CA2379602C CA2379602C (en) 2010-05-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2379602A Expired - Lifetime CA2379602C (en) 1999-08-30 2000-06-09 Method of operating microsurgical instruments

Country Status (15)

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US (2) US6514268B2 (en)
EP (1) EP1207825B1 (en)
JP (1) JP4279493B2 (en)
AR (2) AR024284A1 (en)
AT (1) ATE274334T1 (en)
AU (1) AU765431B2 (en)
BR (1) BR0013705B1 (en)
CA (1) CA2379602C (en)
DE (1) DE60013304T2 (en)
DK (1) DK1207825T3 (en)
ES (1) ES2225163T3 (en)
MX (1) MXPA02001577A (en)
PT (1) PT1207825E (en)
TW (1) TW450796B (en)
WO (1) WO2001015640A1 (en)

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Publication number Publication date
TW450796B (en) 2001-08-21
US20020173814A1 (en) 2002-11-21
BR0013705B1 (en) 2009-01-13
ES2225163T3 (en) 2005-03-16
WO2001015640A1 (en) 2001-03-08
CA2379602C (en) 2010-05-04
US6773445B2 (en) 2004-08-10
AR034529A2 (en) 2004-02-25
US20030078609A1 (en) 2003-04-24
ATE274334T1 (en) 2004-09-15
DK1207825T3 (en) 2004-12-13
DE60013304T2 (en) 2005-09-08
DE60013304D1 (en) 2004-09-30
BR0013705A (en) 2002-08-13
US6514268B2 (en) 2003-02-04
AU5603500A (en) 2001-03-26
PT1207825E (en) 2004-12-31
MXPA02001577A (en) 2002-07-02
EP1207825B1 (en) 2004-08-25
JP4279493B2 (en) 2009-06-17
EP1207825A1 (en) 2002-05-29
AU765431B2 (en) 2003-09-18
AR024284A1 (en) 2002-09-25
JP2003529402A (en) 2003-10-07

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