Surgical fluid management
First Claim
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1. A method for controlling fluid pressure within a body cavity, comprising:
- pumping fluid to the body cavity through a flow restrictor located between the body cavity and a fluid pump;
measuring a pressure change across the flow restrictor resulting from the flow of fluid through the flow restrictor;
calculating the fluid pressure within the body cavity based on the measured pressure change; and
controlling fluid flow to the body cavity, while fluid is flowing to the body cavity, based on the calculated fluid pressure.
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Abstract
A fluid flow device includes a housing configured to releasably mate with a surgical control unit for controlling fluid flow during a surgical procedure. First and second ports measure fluid pressure within a fluid path provided within the housing. The fluid flow device includes a restrictor for restricting fluid flow at a restriction location along the fluid path. The first port is located upstream of the restriction location and the second port is located downstream of the restriction location. A fluid pump is provided within the housing.
35 Citations
23 Claims
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1. A method for controlling fluid pressure within a body cavity, comprising:
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pumping fluid to the body cavity through a flow restrictor located between the body cavity and a fluid pump; measuring a pressure change across the flow restrictor resulting from the flow of fluid through the flow restrictor; calculating the fluid pressure within the body cavity based on the measured pressure change; and controlling fluid flow to the body cavity, while fluid is flowing to the body cavity, based on the calculated fluid pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for controlling fluid pressure within a body cavity, comprising:
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setting a setpoint body cavity pressure; pumping fluid to the body cavity through a flow restrictor located between the body cavity and a fluid pump; measuring a pressure change across the flow restrictor resulting from the flow of fluid through the flow restrictor; calculating the fluid pressure within the body cavity based on the measured pressure change; comparing the calculated fluid pressure in the body cavity with the setpoint body cavity pressure; and controlling pump outlet pressure (P), flow rate (Q) and pump speed (RPM) based on a three-dimensional system model defined by the function RPM=f(P,Q) while fluid is flowing to the body cavity. - View Dependent Claims (13, 14, 15, 16)
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17. A computer-readable recording medium in which computer-executable program codes are stored, the program codes being configured to cause a computer to perform a method for controlling fluid pressure within a body cavity, the method comprising:
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pumping fluid to the body cavity through a flow restrictor located between the body cavity and a fluid pump; measuring a pressure change across the flow restrictor resulting from the flow of fluid through the flow restrictor; calculating the fluid pressure within the body cavity based on the measured pressure change; and controlling fluid flow to the body cavity, while fluid is flowing to the body cavity, based on the calculated fluid pressure. - View Dependent Claims (18, 19, 20)
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21. A method for controlling fluid pressure within a body cavity, comprising:
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pumping fluid to the body cavity through a flow restrictor located between the body cavity and a fluid pump; measuring a pressure change across the flow restrictor resulting from the flow of fluid through the flow restrictor; calculating the fluid pressure within the body cavity based on the measured pressure change; and adjusting fluid flow to the body cavity, while fluid is flowing to the body cavity, based on the calculated fluid pressure. - View Dependent Claims (22, 23)
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Specification