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US 5,853,384 AGranted
Fluid jet surgical cutting tool and aspiration device
AssigneeSurgiJet, Inc.
InventorScott Bair
Life of this patent
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AssigneeSurgiJet, Inc.
InventorScott Bair
Estimating the term…
An instrument for providing high pressure fluid pulses for cutting tissue including an internal pressure intensifying mechanism, and the provision of a suction force at the distal end of the instrument including an internal vacuum generating device to increase the suction force provided by a conventional suction source. A piston mechanism is provided for converting a low pressure fluid input to a high pressure fluid output, and a second piston mechanism is provided to intensify the suction force created by a conventional suction source at the surgical site.
A surgical instrument for aspirating fluid and debris from a surgical site, comprising
A surgical instrument for aspirating fluid and debris from a surgical site, comprising
A surgical instrument for aspirating fluid and debris from a surgical site, comprising:
A surgical instrument comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Surgical cutting instruments: fluid jet cutting instruments
Details of operation mode: pulsed
Pneumatically or hydraulically operated: pneumatically
Auxiliary appliance: with suction drainage system
Term ended 29 Dec 2015 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
The present disclosure generally relates to surgical cutting tools, and, more particularly, to cutting tools employing a fluid jet as the active cutting agent. The disclosure further relates to surgical cutting tools utilizing suction for aspiration purposes, and, in particular, relates to a tool for amplifying the suction force at the surgical site.
2. Discussion of the Prior Art
So that one skilled in the art to which the subject disclosure appertains will better understand how to make and use the disclosure, preferred embodiments of the surgical apparatus will be described hereinbelow with reference to the drawings wherein:
FIG. 1 is a functional block diagram of the fluid jet surgical instrument of the present disclosure;
FIG. 2 is a perspective view showing the fluid jet surgical instrument in use;
The present disclosure generally includes a pulsed fluid jet surgical instrument for cutting, excision, emulsification and removal of tissue. With reference to FIG. 1, the instrument includes a handpiece 21 adapted to be wielded manually with a cannula 22 extending therefrom. Cannula 22 emits a pulsed jet of high pressure fluid for surgical cutting and tissue emulsification. Cannula 22 is connected to an aspiration system 23 which provides vacuum aspiration to remove the fluid introduced by the instrument, as well as body fluids and emulsified tissue. The handpiece 21 is also connected to a low pressure fluid supply 24 that provides the fluid which forms the high pressure pulsed cutting jet. A low pressure gas supply 26 is also connected to the handpiece 21 to power the handpiece to produce high pressure fluid pulses.
The instrument is wielded by a surgeon as shown in FIG. 2 to produce surgical cutting and excision tasks for therapeutic purposes. It should be noted initially that the handpiece 21 is devoid of any connection to a high pressure source of any kind. As a result, failure of the instrument will not introduce a high pressure fluid stream into the patient. Thus, the disclosure is inherently safer than conventional instruments utilizing fluid cutting capabilities.
With regard to FIG. 3, the handpiece 21 includes an interior gas reservoir 31 that is connected through port 32 to the low pressure gas supply 26. The handpiece also provides a piston 36 having a broad head 37 that is disposed concentrically in a bore 33 in a pressure sealing, translating fashion. The head 37 divides the bore 33 into a driving chamber 34 and a retracting chamber 38. The retracting chamber 38 communicates through port 39 to an actuating valve (not shown) that selectively vents the retracting chamber 38 and permits pulsed operation of the unit. The actuating valve may include a pneumatic switch on the handpiece, or a footswitch coupled by tubing to the port 39.