Passive Leg Raising - an Important Diagnostic Manoeuvre and Its Dependency on the Activity of the Autonomous Nervous System in Critically Ill Patients and Healthy Subjects
Passive Leg Raising - an Important Diagnostic Manoeuvre and Its Dependency on the Activity of the Autonomous Nervous System in Critically Ill Patients and Healthy Subjects
The aim is to describe the physiological background for PLR and the interpretation of a PLR manoeuvre.
The protocol entails the measurement of stroke volume (SV) at baseline (semirecumbent patient position), during PLR and after returning to semirecumbent position. Simultaneously blood pressure (BP), pulse rate (PR), pulse oximetric saturation (SpO2) and ECG are recorded. The procedure is performed in ten normal subjects, ten patients recruited in the cardiology outpatient department and ten critically ill patients under analgosedation in the ICU.
Analysis includes changes in measured variables and heart rate variability in the frequency domain during the three phases of the experiment.
See above
Inclusion Criteria:
Consenting after written and oral information
Exclusion Criteria:
Contraindications to PLR: intracranial or abdominal hypertension