Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1995-12-22
1998-04-07
Green, Randall L.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604 22, 606167, A61M 3100, A61B 1720, A61B 1732
Patent
active
057358150
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 retracting 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 at 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.
REFERENCES:
patent: 1889425 (1932-03-01), Sorensen
patent: 3353537 (1967-11-01), Knox et al.
patent: 3452745 (1969-07-01), Hutchinson et al.
patent: 3515130 (1970-06-01), Tsujino
patent: 3542017 (1970-11-01), Adams
patent: 3561433 (1971-02-01), Kovach
patent: 3590813 (1971-07-01), Roszyk
patent: 3605745 (1971-09-01), Hodosh
patent: 3768472 (1973-10-01), Hodosh et al.
patent: 3792701 (1974-02-01), Kloz et al.
patent: 3811795 (1974-05-01), Olsen
patent: 3906954 (1975-09-01), Baehr et al.
patent: 3930505 (1976-01-01), Wallach
patent: 3993054 (1976-11-01), Newman
patent: 3994297 (1976-11-01), Kopf
patent: 4018623 (1977-04-01), Walker
patent: 4024866 (1977-05-01), Wallach
patent: 4186733 (1980-02-01), Mogaki
patent: 4278078 (1981-07-01), Smith
patent: 4282867 (1981-08-01), DuToit
patent: 4349130 (1982-09-01), Bair
patent: 4365752 (1982-12-01), Waisbren et al.
patent: 4368734 (1983-01-01), Banko
patent: 4412823 (1983-11-01), Sakai et al.
patent: 4441488 (1984-04-01), Macabee
patent: 4515532 (1985-05-01), Walling
patent: 4534340 (1985-08-01), Kerr et al.
patent: 4560373 (1985-12-01), Sugino et al.
patent: 4561856 (1985-12-01), Cochran
patent: 4570632 (1986-02-01), Woods
patent: 4583531 (1986-04-01), Mattchen
patent: 4589412 (1986-05-01), Kensey
patent: 4655197 (1987-04-01), Atkinson
patent: 4690672 (1987-09-01), Veltrup
patent: 4694828 (1987-09-01), Eichenbaum
patent: 4705500 (1987-11-01), Reimels et al.
patent: 4764165 (1988-08-01), Reimels et al.
patent: 4776840 (1988-10-01), Freitas et al.
patent: 4790824 (1988-12-01), Morrow et al.
patent: 4817599 (1989-04-01), Drews
patent: 4857047 (1989-08-01), Amoils
patent: 4861340 (1989-08-01), Smith et al.
patent: 4878900 (1989-11-01), Sundit
patent: 4898574 (1990-02-01), Uchiyama et al.
patent: 4908015 (1990-03-01), Anis
patent: 4913698 (1990-04-01), Ito et al.
patent: 4915691 (1990-04-01), Jones et al.
patent: 4935006 (1990-06-01), Hasson
patent: 4944726 (1990-07-01), Hilal et al.
patent: 4950238 (1990-08-01), Sullivan
patent: 5013300 (1991-05-01), Williams
patent: 5019037 (1991-05-01), Wang et al.
patent: 5024615 (1991-06-01), Buchel
patent: 5033961 (1991-07-01), Kandler et al.
patent: 5037431 (1991-08-01), Summers et al.
patent: 5037432 (1991-08-01), Molinari
patent: 5046486 (1991-09-01), Grulke et al.
patent: 5047008 (1991-09-01), De Juan, Jr. et al.
patent: 5049124 (1991-09-01), Bales, Jr.
patent: 5064413 (1991-11-01), McKinnon et al.
patent: 5135482 (1992-08-01), Neracher
patent: 5135484 (1992-08-01), Wright
patent: 5176645 (1993-01-01), Guerrero
patent: 5218956 (1993-06-01), Handler et al.
patent: 5261883 (1993-11-01), Hood et al.
patent: 5322504 (1994-06-01), Doherty et al.
patent: 5361583 (1994-11-01), Huitema
patent: 5364405 (1994-11-01), Zaleski
patent: 5370609 (1994-12-01), Drasler et al.
patent: 5413556 (1995-05-01), Whittingham
A Critical Examination of the Use of Water Jets For Medical Applications Vijay--Aug. 29-31, 1989, Toronto, pp. 425-448.
Uchino et al, Jet Cutting Technology, Sendai, Japan--4-6 Oct., 1988; pp. 629-639.
Transection of the Liver With a Water Jet .sub.-- Persson, M.D. et al. Lund, Sweden, Mar. 1989, vol. 168, pp. 267-268.
Rheolytic Catheter For Percutaneous Removal of Thrombus, Drasler, Ph.D., et al, Radiology, vol. 182, No. 1, pp. 263-267, 1992.
Alexander V.
Green Randall L.
Sentinel Medical, Inc.
Zimmerman Harris
LandOfFree
Method of using fluid jet surgical cutting tool does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of using fluid jet surgical cutting tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of using fluid jet surgical cutting tool will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-8329