PVI for Prediction of Spinal Induced Hypotension

Can Plethysmography Variability Index (PVI) Predict Spinal Induced Hypotension in Women Undergoing Cesarean Delivery?

The hypothesis is that plethysmography variability index can predict the occurrence of hypotension after spinal anesthesia for cesarean delivery

Inclusion Criteria:

• English speaking ASA I-II non-laboring women with single gestations ≥36 weeks
• Scheduled or unscheduled cesarean delivery under spinal anesthesia
• Height: 5 feet-5 feet 11 in.

Exclusion Criteria:

• Laboring women needing an emergency cesarean delivery
• Severe hypertensive disease of pregnancy defined as systolic blood pressure (SBP)>160mmHg, diastolic blood pressure (DBP)>110mmHg requiring antihypertensive treatment or associated with significant proteinuria.
• Severe Cardiac disease in pregnancy with marked functional limitations
• Diabetes type I
• Patients on Monoamine Oxidase Inhibitors or Tricyclic Antidepressants
• Inclusion in another anesthetic study involving drug administration.