Apparatus and method for determining that a surgical fluid container is near empty
First Claim
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1. A microsurgical system, comprising:
- a surgical handpiece;
a source of surgical fluid fluidly coupled to said handpiece and having an ability to provide said surgical fluid to said handpiece in response to application of a pneumatic pressure;
a pneumatic pressure source; and
a control system having;
a valve fluidly coupled to said pneumatic pressure source;
a pressure transducer fluidly coupled to said valve; and
a computer operatively coupled to said valve and said pressure transducer;
whereby said control system has an ability to;
provide a desired pneumatic pressure to said source of surgical fluid;
determine a first amount of time that it takes to provide said desired pneumatic pressure to said source of surgical fluid; and
determine when said first amount of time equals or exceeds a predetermined second amount of time corresponding to a time it takes said control system to provide said desired pneumatic pressure when said source of surgical fluid contains a predetermined amount of said surgical fluid.
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Abstract
An apparatus and method of determining when a container holding surgical fluid to be provided to a surgical handpiece, such as a liquefracture handpiece, is nearly exhausted is disclosed.
35 Citations
20 Claims
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1. A microsurgical system, comprising:
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a surgical handpiece; a source of surgical fluid fluidly coupled to said handpiece and having an ability to provide said surgical fluid to said handpiece in response to application of a pneumatic pressure; a pneumatic pressure source; and a control system having; a valve fluidly coupled to said pneumatic pressure source; a pressure transducer fluidly coupled to said valve; and a computer operatively coupled to said valve and said pressure transducer; whereby said control system has an ability to; provide a desired pneumatic pressure to said source of surgical fluid; determine a first amount of time that it takes to provide said desired pneumatic pressure to said source of surgical fluid; and determine when said first amount of time equals or exceeds a predetermined second amount of time corresponding to a time it takes said control system to provide said desired pneumatic pressure when said source of surgical fluid contains a predetermined amount of said surgical fluid. - View Dependent Claims (2, 3, 4, 5)
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6. A microsurgical system, comprising:
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a liquefracture handpiece; a source of surgical fluid having a deformable liner containing surgical fluid and fluidly coupled to said handpiece; a pneumatic pressure source for collapsing said deformable liner; and a control system having; a valve fluidly coupled to said pneumatic pressure source; a pressure transducer fluidly coupled to said valve; and a computer operatively coupled to said valve and said pressure transducer; whereby said control system has an ability to; provide a desired pneumatic pressure on said deformable liner; determine a first amount of time that it takes to provide said desired pneumatic pressure on said deformable liner; and determine when said first amount of time equals or exceeds a predetermined second amount of time corresponding to an amount of time it takes said control system to provide said desired pneumatic pressure when said deformable liner contains a predetermined amount of said surgical fluid. - View Dependent Claims (7, 8, 9)
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10. A microsurgical system, comprising:
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a surgical handpiece; a source of surgical fluid having a deformable liner containing surgical fluid and fluidly coupled to said handpiece; a pneumatic pressure source for collapsing said deformable liner; a controller for controlling a flow of the surgical fluid from the surgical handpiece, wherein a position of the controller is associated with a flow rate; a control system configured to provide a desired pneumatic pressure on said deformable liner; wherein the control system is configured to determine a first amount of time to provide said desired pneumatic pressure on said deformable liner; and wherein the control system is further configured to determine when said first amount of time equals or exceeds a predetermined second amount of time corresponding to an amount of time to provide said desired pneumatic pressure when said deformable liner contains a predetermined amount of said surgical fluid. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification