In-Joint Sensor For A Surgical Fluid Management Pump System

Abstract

An in-joint pump and control device comprising a pump and an in-joint sensor. The pump is configured to convey fluid to a body joint surgical site. The pump has an algorithm associated therewith to make calculations and to assist in controlling the operation of the pump. The in-joint sensor is operatively associated with the pump by at least a communication member. The in-joint sensor comprises a sheath, an integration member attached to the sheath, a pressure sensor connected to the integration member, and a temperature sensor adjacent the sheath. The pressure sensor is adapted to provide pressure information to the pump via the communication member. The temperature sensor is also adapted to provide temperature information to the pump via the communication member.

1 . A surgical pump system for providing fluid to a joint at a surgical site, comprising:
 an inflow pump motor;   an outflow pump motor;   a pressure sensor associated with the inflow pump for measuring a head pressure value;   one or more surgical devices;   an input interface for receiving one or more input fluid characteristics and surgical device information of the one or more surgical devices, and   at least one pump control processor for receiving the head pressure value and the surgical device information,   wherein the pump control processor executes an algorithm to calculate pump drive to drive at least the inflow pump motor so that the pump system provides the selected one or more input fluid characteristics by independently controlling two or more pinch valves associated with the outflow pump to control the flow rate of fluid through the surgical site.   
     
     
         2 . The surgical pump system of  claim 1 , wherein the one or more input fluid characteristic is any of an inflow flow rate value, a maximum in-joint temperature value, and a desired in-joint pressure value. 
     
     
         3 . The surgical pump system of  claim 2 , wherein the pump drive signals are configured to drive the inflow pump motor and the outflow pump motor. 
     
     
         4 . The surgical pump system of  claim 3 , wherein the maximum in-joint temperature value varies for different joint sizes and different types of joint surgery, the maximum in-joint temperature value comprising one of a plurality of maximum in-joint temperature values stored in a pump memory device that is configured for communication with the pump control processor. 
     
     
         5 . The surgical pump system of  claim 4 , further including an in-joint sensing devices for measuring fluid characteristics, the in-joint sensing device comprising an in-joint pressure sensor, wherein the in-joint device provides a measured in-joint pressure value to the pump control processor for calculating the pump drive signals. 
     
     
         6 . The surgical pump system of  claim 1 , wherein an inflow pump cassette is secured to the inflow pump motor. 
     
     
         7 . The surgical pump system of  claim 6 , wherein an outflow pump cassette is secure to the outflow pump motor. 
     
     
         8 . The surgical pump system of  claim 7 , wherein the inflow pump motor and the outflow pump motor are disposed in a pump housing. 
     
     
         9 . The surgical pump system of  claim 8 , wherein the pump housing is configured to receive the inflow pump cassette in driving relation with the inflow pump motor and configured to receive the outflow pump cassette in driving relation with the outflow pump motor. 
     
     
         10 . The surgical pump system of  claim 1 , wherein surgical device information is any of a state and type of the one or more surgical devices. 
     
     
         11 . The surgical pump system of  claim 1 , wherein the input interface is configured to receive inputs manually from an operator or automatically from an input source. 
     
     
         12 . A surgical pump system for providing fluid to a joint at a surgical site, comprising:
 an inflow pump motor with an inflow pump motor measuring device for measuring revolutions per minute (RPM) to obtain an RPM value for the inflow pump motor;   an outflow pump motor;   a pressure sensor associated with the inflow pump for measuring a head pressure value;   one or more surgical devices;   an input interface for receiving inputs one or more input fluid characteristics and surgical device information of the one or more surgical devices, and   at least one pump control processor for receiving the input fluid characteristics, the head pressure value, the inflow pump motor RPM value, and the surgical device information;   wherein the pump control processor processes at least the surgical device information, the head pressure value, and the inflow pump motor RPM value to determine and provide at least pump drive signals to the inflow pump motor and the outflow pump motor to obtain the selected desired fluid outflow rate through a handpiece suction outflow path of the one or more surgical devices.   
     
     
         13 . The surgical pump system of  claim 12 , further including a bus connection for communication between the one or more surgical devices and the pump control processor, wherein the pump control processor receives the suction control signal and identification information of the one or more surgical devices. 
     
     
         14 . The surgical pump system of  claim 12 , further including a current sensing device,
 the current sensing device configured to sense a current waveform of the power drawn by the one or more surgical devices.   
     
     
         15 . The surgical pump of  claim 14 , wherein the pump control processor processes the current waveform of the one or more surgical devices to provide the selected desired fluid outflow rate through the handpiece suction outflow path. 
     
     
         16 . The surgical pump system of  claim 12 , wherein the one or more input fluid characteristic is any of an inflow flow rate value, a maximum in-joint temperature value, and a desired in-joint pressure value. 
     
     
         17 . The surgical pump system of  claim 12 , wherein an inflow pump cassette is secured to the inflow pump motor. 
     
     
         18 . The surgical pump system of  claim 17 , wherein an outflow pump cassette is secured to the outflow pump motor. 
     
     
         19 . The surgical pump system of  claim 18 , wherein the inflow pump motor and the outflow pump motor are disposed in a pump housing. 
     
     
         20 . The surgical pump system of  claim 12 , wherein the input interface is configured to receive inputs manually from an operator or automatically from an input source.