CA2127637A1 - Fluid jet surgical cutting tool - Google Patents

Fluid jet surgical cutting tool

Info

Publication number
CA2127637A1
CA2127637A1 CA002127637A CA2127637A CA2127637A1 CA 2127637 A1 CA2127637 A1 CA 2127637A1 CA 002127637 A CA002127637 A CA 002127637A CA 2127637 A CA2127637 A CA 2127637A CA 2127637 A1 CA2127637 A1 CA 2127637A1
Authority
CA
Canada
Prior art keywords
fluid
piston
high pressure
pressure
chamber
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
CA002127637A
Other languages
French (fr)
Other versions
CA2127637C (en
Inventor
Scott Bair
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.)
Surgijet Inc
Original Assignee
Sentinel Medical Inc
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 Sentinel Medical Inc filed Critical Sentinel Medical Inc
Publication of CA2127637A1 publication Critical patent/CA2127637A1/en
Application granted granted Critical
Publication of CA2127637C publication Critical patent/CA2127637C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • A61B17/3203—Fluid jet cutting instruments
    • 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
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2217/00—General characteristics of surgical instruments
    • A61B2217/002—Auxiliary appliance
    • A61B2217/005—Auxiliary appliance with suction drainage system
    • 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
    • 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

Abstract

A pulsed fluid jet surgical instrument includes a cannula extending from a handpiece, the cannula emitting a pulsed fluid jet for cutting and emulsification purposes, and also providing suction for aspiration and evacuation of the fluid and tissue. A pressure intensifier piston arrangement receives fluid at relatively low pressure, and operates reciprocally and reiteratively to pump the fluid through the jet needle in a series of high pressure pulses, each having a nearly rectangular pressure waveform. The pressure intensifier piston is T-shaped, including a broad end which divides a drive bore into a driving chamber and a retracing chamber.
A
bistable valve is connected to admit high pressure gas into the actuating chamber, driving the piston to translate. The narrow end of the piston is disposed in a fluid pumping chamber connected to a supply of fluid. The translating piston drives the fluid from the pumping chamber through a first check valve into a fluid jet needle, which directs the high pressure fluid pulse to a tissue target. The bistable valve switches to admit pressurized gas to the retracting chamber, driving the piston retrograde and allowing the pumping chamber to refill with fluid through a second check valve. There is no high pressure fluid supplied to the handpiece, and only the pressure intensifying pumping action of the piston creates a high pressure fluid pulse. The gas supply to drive the piston is t a relatively low pressure, so that gas pressure cannot comprise a safety risk to the patient. Thus failure of the piston mechanism cannot result in the emission of a stream of high pressure fluid, and the instrument is inherently safer than prior art instruments that are connected to a high pressure fluid source.
CA002127637A 1993-07-26 1994-07-08 Fluid jet surgical cutting tool Expired - Fee Related CA2127637C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US9629793A 1993-07-26 1993-07-26
US08/096,297 1993-07-26
PCT/US1997/007065 WO1998044853A1 (en) 1993-07-26 1997-04-07 Fluid jet surgical cutting tool

Publications (2)

Publication Number Publication Date
CA2127637A1 true CA2127637A1 (en) 1995-01-27
CA2127637C CA2127637C (en) 2006-01-03

Family

ID=26791549

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002127637A Expired - Fee Related CA2127637C (en) 1993-07-26 1994-07-08 Fluid jet surgical cutting tool

Country Status (8)

Country Link
US (2) US5853384A (en)
EP (1) EP0636345B1 (en)
JP (1) JPH07313520A (en)
AU (1) AU677061B2 (en)
CA (1) CA2127637C (en)
DE (1) DE69414924T2 (en)
ES (1) ES2125379T3 (en)
WO (1) WO1998044853A1 (en)

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AU677061B2 (en) 1997-04-10
CA2127637C (en) 2006-01-03
JPH07313520A (en) 1995-12-05
US5853384A (en) 1998-12-29
WO1998044853A1 (en) 1998-10-15
US5562692A (en) 1996-10-08
EP0636345A1 (en) 1995-02-01
EP0636345B1 (en) 1998-12-02
DE69414924D1 (en) 1999-01-14
AU6746894A (en) 1995-02-02
DE69414924T2 (en) 1999-05-27
ES2125379T3 (en) 1999-03-01

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