Surgical fluid management
AssigneeSmith & Nephew, Inc.
InventorsCemal Shener, Kenneth W. Krause
Life of this patent
Estimating the term…
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.
Claims23
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.
A method for controlling fluid pressure within a body cavity, comprising:
- 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.
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:
- 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.
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
- adjusting fluid flow to the body cavity, while fluid is flowing to the body cavity, based on the calculated fluid pressure.
Dependencies are inferred from the claim text.