Fluid operated ophthalmic irrigation and aspiration device

• US 4,274,411 A
• Filed: 03/30/1979
• Issued: 06/23/1981
• Est. Priority Date: 03/30/1979
• Status: Expired due to Term

• Current Assignee: Robert S. Dotson Jr
• Original Assignee: Robert S. Dotson Jr
• Inventors: Dotson, Robert S. Jr.
• Primary Examiner(s): Michell, Robert W.
• Assistant Examiner(s): KRUTER, JEROME
• Application Number:
  US06/025,537
• Time in Patent Office: 816 Days
• Field of Search: 128/276, 128/277, 128/278, 128/910, 137/205, 251/5, 32/33
• US Class Current: 604/30
• CPC Class Codes: A61B 2017/00544 pneumatically
• CPC Class Codes: A61F 9/00763 with rotating or reciprocating cutting elements, e.g. concentric cutting needles atherectomy cutting instruments A61B17/3207; endoscopic cutting instruments A61B17/320016
• CPC Class Codes: A61M 1/75 Intermittent or pulsating suction A61M1/63, A61M1/772 take precedence
• CPC Class Codes: Y10S 128/91 Anesthesia gas scavenging system

Abstract

A fluid operated and controlled irrigation and aspiration device for ophthalmic use. A source of fluid under pressure is connected through foot pedal operated valves to clamps for controlling irrigation through a conventional handpiece, and to a vacuum generating device. Selecting valves are provided for isolating the vacuum generating means, and for directing pressure to a pulsing circuit. The pulsing circuit can be used to control the vacuum to yield a pulsing aspiration; and, in a modification of the device, the pulsing circuit can be used to control a pressure circuit to operate a cutting device.

Claims

1. An ophthalmic irrigation and aspiration device comprising;

(a) a source of irrigation liquid,

(b) a vacuum source,

(c) a handpiece, including a needle for insertion into the site of use, said handpiece being adapted to carry outlets for the irrigation liquid and the vacuum from the respective sources thereof,

(d) a vacuum control valve for selectively connecting said vacuum outlet in the handpiece to said vacuum source,

(e) pulsing means for cyclically operating said vacuum control valve,

(f) irrigation control means for controlling the flow of said irrigation liquid through the outlet for irrigation liquid in said handpiece, characterized in that said irrigation control means includes first clamping means for stopping the flow of said irrigation liquid through said handpiece,

(g) aspiration control means for controlling the application of said vacuum source through said handpiece,

(h) fluid operated means for releasing said first clamping means,

(i) a source of fluid under pressure,

(j) first valve means for selectively connecting said source of fluid under pressure to said fluid operated means for releasing said first clamping means,

(k) a fluid operated vacuum generating device,

(l) a second valve for selectively directing fluid under pressure from said first valve to said vacuum generating device,

(m) a first toggle valve for selectively connecting said fluid under pressure to said pulsing means and to said vacuum control valve,

(n) said pulsing means including a first fluid operated valve having an input, an output, and a valve operating port, a second fluid operated valve having an input, an output, and a valve operating port,

(o) said output of said first fluid operated valve being in communication with said valve operating port of said second fluid operated valve, and

(p) said output of said second fluid operated valve being in communication with said valve operating port of said first fluid operated valve, said output of said second fluid operated valve being connected to said vacuum control valve.

2. An ophthalmic irrigation and aspiration device as claimed in claim 1, characterized in that said pulsing means includes a first fluid operated valve communicating with said fluid under pressure, a second fluid operated valve for directing said fluid under pressure to said vacuum control valve, said first fluid operated valve comprising means for opening said second fluid operated valve, said second fluid operated valve comprising means for closing said first fluid operated valve.

3. An ophthalmic irrigation and aspiration device as claimed in claim 2 wherein said handpiece includes a cutter, and characterized by pulsing pressure emitted by said pulsing means, a toggle valve for selectively connecting said pulsing pressure to said vacuum control valve and to a cutter tubing valve for cyclically operating said cutter tubing valve.

4. An ophthalmic irrigation annd aspiration device as claimed in claim 1, and further characterized by first variable valve means for allowing dissipation of fluid through said valve operating port of said first fluid operated valve, and second variable valve means for allowing dissipation of fluid through said valve operating port of said second fluid operated valve.

5. An ophthalmic irrigation and aspiration device comprising:

(a) a source of irrigation liquid,

(b) a vacuum source,

(c) a handpiece, including a needle for insertion into the site of use, said handpiece being adapted to carry outlets for the irrigation liquid and the vacuum from the respective sources thereof,

(d) a vacuum control valve for selectively connecting said vacuum outlet in the handpiece to said vacuum source,

(e) pulsing means for cyclically operating said vacuum control valve,

(f) irrigation control means for controlling the flow of said irrigation liquid through the outlet for irrigation liquid in said handpiece, characterized in that said irrigation control means includes first clamping means for stopping the flow of said irrigation liquid through said handpiece,

(g) aspiration control means for controlling the application of said vacuum source through said handpiece,

(h) fluid operated means for releasing said first clamping means,

(i) a source of fluid under pressure,

(j) first valve means for selectively connecting said source of fluid under pressure to said fluid operated means for releasing said first clamping means,

(k) a second clamping means for stopping the flow of said irrigation fluid to said handpiece,

(l) second fluid operated means for releasing said second clamping means,

(m) a toggle valve means for selectively connecting said first clamping means and said second clampng means to said fluid under pressure,

(n) a second fluid controlled valve,

(o) tubing means connection said second fluid controlled valve to fluid under pressure in said second fluid operated means for closing said second fluid controlled valve, and

(p) said second fluid controlled valve being interposed between said second valve and said vacuum generating device.