About this trial
The aim of the current study is to evaluate the effects of the Hypotension Prediction Index (HPI) on the degree of intraoperative hypotension in patients undergoing free flap surgery. The hypothesis is that implementation of the HPI algorithm will reduce the time-weighted average (TWA) intraoperative hypotension below a threshold of 65 mmHg (16), and to reveal the relationship between the episodes of hypotension and free flap viability and function.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Patients qualified to head and neck free flap surgery
Written informed consent
Disqualifiers
Patients under 18 years
Lack of health insurance
Pregnancy
Known history of congenital heart disease, severe aortic and/or mitral stenosis, heart failure and ejection fraction < 35 %
Trial design
Parallel
Treatments tested in this trial
Hypotension Prediction Index
DeviceHemodynamic perioperative monitoring with the Hypotension Prediction Index
Treatment groups
Trial outcomes
Primary outcomes
TWA Mean Arterial Pressure (MAP) < 65 mmHg
TWA - MAP \< 65 mmHg - time weighed average = (depth of hypotension in millimeters of mercury below a MAP of 65 mmHg x time in minutes spent below MAP of 65mmHg)/total duration of operation in minutes
Secondary outcomes
TWA - MAP < 60 mmHg
time weighed average = (depth of hypotension in millimeters of mercury below a MAP of 60 mmHg x time in minutes spent below MAP of 60 mmHg)/total duration of operation in minutes
TWA - MAP < 55 mmHg
time weighed average = (depth of hypotension in millimeters of mercury below a MAP of 55 mmHg x time in minutes spent below MAP of 55 mmHg)/total duration of operation in minutes
30 day mortality
30 day mortality
Length of hospitalisation
Length of hospitalisation
Sponsors and contacts
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Jakub Szrama
Lead sponsor
Poznan University of Medical Sciences
Sponsor institution