PRESSURE CONTROL ALGORITHM FOR HIGH RESISTANCE HARDWARE

摘要

A pump and pump controller which uses an algorithm to quickly achieve and maintain a set pressure in a surgical site when high resistance hardware is being used is provided. The algorithm uses a gravity control type loop and uses pressure loss calculations to quickly respond to changing joint conditions. A method of using such a pump and pump controller is also provided.

主权项

1. A method of controlling a surgical pump, the method comprising:
providing a surgical pump having an inflow motor which performs within a range of RPMs for providing fluid to a surgical site; providing a pump controller connected to the surgical pump and which at least in part assists in controlling the surgical pump; providing surgical hardware to be used for a specific surgical procedure to be performed; providing a desired surgical site pressure value which is communicated to the pump controller; the pump controller calculating a pressure loss value using a pressure loss curve for the surgical hardware; the pump controller taking a guess at the value of the head pressure in order to achieve the desired pressure at the surgical site; the pump controller adjusting the inflow motor RPMs until the guess value of the head pressure is attained, within a set tolerance level to create a Phead value; the pump controller subtracting the pressure loss value from the Phead value to determine an estimated surgical site pressure value; the pump controller comparing the estimated surgical site pressure value with the desired surgical site pressure value; and setting the Phead value based on the comparison of the estimated surgical site pressure to the desired surgical site pressure value.