Perfusion Index-derived Parameters as Predictors Post-induction Hypotension.

Launched by CAIRO UNIVERSITY · Jan 2, 2020

Keywords

ClinConnect Summary

The perfusion index (PI) is a numerical value for the ratio between pulsatile and non-pulsatile blood flow measured by a special pulse oximeter. PI represents the baseline sympathetic tone which is assumed one of the factors contributing for hypotension. Patients with low PI were reported by Mahendale and Rajasekhar to show greater hypotension after induction of anesthesia. This was explained by the high sympathetic tone in these patients which is suddenly masked by propofol administration leading to profound hypotension. Moreover, The PI has been described as a reliable tool for vascular t...

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Eligibility criteria

• Inclusion Criteria:
• • • Adult patients (18-59 years)
• • ASA I-II
• • Patients scheduled for elective surgeries under general anaesthesia
• Exclusion Criteria:
• • • Operations which will last for less than 15 minutes.
• • Patients with cardiac morbidities (impaired contractility with ejection fraction \< 40% and tight valvular lesions, unstable angina).
• • Patients with heart block and arrhythmia (atrial fibrillation and frequent ventricular or supraventricular premature beat).
• • Patient with decompansted respiratory disease (poor functional capacity, generalized wheezes, peripheral O2 saturation \< 90% on room air).
• • Patients with peripheral vascular disease or long standing DM affecting PVI readings.
• • Pregnancy.