Hamilton G5 - Introduction; Overview

9-2 624074/07
9 P/V tool maneuver option
9.1 Introduction
NOTE:
The P/V Tool is a monitoring maneuver that provides
information that may be used to optimize PEEP and
other ventilator settings. This is just one piece of infor-
mation that must be considered, however, along with
hemodynamics and other clinical conditions. It is the
clinician's responsibility to appropriately interpret and
apply this information in patient treatment.
9.1.1 Overview
The P/V Tool is a respiratory mechanics maneuver that records
a quasi-static P/V (pressure/volume) curve at the bedside.
The P/V Tool records both the inflation and deflation limbs. The
P/V Tool can be used for diagnostic purposes plus for applying
controlled recruitment maneuvers.
This curve, generated with very low flow, can provide the
physician with valuable and objective information about the
respiratory system mechanics. The information can be useful
for clinical diagnosis as well as for optimization of ventilator
settings.
A cursor function permits graphical analysis of the curve,
including identification of inflection points, and a “visual curve
fitting” that determines the linear compliance.
The maneuvers employ an adjustable pressure ramp in which
airway pressure is slowly increased to an upper level and then
decreased to a lower level.
The P/V Tool maneuvers do not require disconnection of the
breathing circuit, and no patient setting changes. You can
resume normal ventilation at any time.