Control for surgical fluid management pump system

摘要

A surgical pump system arrangement receives an inflow cassette and provides fluid flow to a surgical site in a joint of a patient. The arrangement calculates load coefficients for a pressure loss curve based on an identified inflow cannula and an identified endoscope utilized therewith. The arrangement determines if the cannula is disposed at a surgical site and if adequate fluid flow is provided. Further, the arrangement determines if the inflow cannula and endoscope are properly identified. The arrangement integrates with an identified or unidentified surgical device to adjust pump operation when the surgical device is operating. The arrangement maps actuators disposed on a surgical handpiece or footswitch to control operation of the pump system, including providing suction to an outflow path of a surgical device that is not operating. The arrangement also determines when an inflow pump cassette is not properly inserted into the pump.

主权项

1. A surgical pump system for providing fluid to a surgical site and including an inflow cannula for use in surgery comprising:
an inflow drive mechanism including an inflow pump motor for outputting fluid to a surgical site via an inflow cannula; an inflow pump cassette for securing to the inflow drive mechanism; a pump housing configured to include said inflow drive mechanism, said pump housing configured to receive the inflow pump cassette in driving relation with the inflow drive mechanism; an input interface for manually or automatically receiving inputs of a type of joint for a surgery, a predetermined desired in-joint pressure value and a type of inflow cannula for use in the surgical pump system; an inflow pump motor measuring device for measuring revolutions per minute (RPM) of the motor to obtain a RPM value for the inflow pump motor; an inflow pump pressure sensor associated with the inflow drive mechanism for measuring a pump head pressure value Phead; a pump control processor for receiving information including a type of joint for surgery, a predetermined desired in-joint pressure value, identification information for an inflow cannula, head pressure value Phead, and an inflow pump motor RPM value; and a pump memory device configured for storing pressure loss data for an inflow cannula, the pump control processor determining a 1st load coefficient (COEF1) and a 2nd load coefficient (COEF2) for a second order polynomial pressure loss equation based on properties of an inflow cannula, wherein the pump control processor executes an algorithm to calculate a pressure loss Ploss determined by the 1st and 2nd load coefficients and the RPM value of the inflow pump motor by applying the Ploss equation:
Ploss=COEF1×(RPM value)2+COEF2×(RPM value),wherein the pump control processor determines an in-joint pressure value Pjoint by applying the equation:
Pjoint=Phead−Ploss,and
wherein the pump control processor provides at least pump drive signals to drive at least the inflow pump motor in order to maintain the predetermined desired joint pressure value.