The purpose of this study is to determine if lower extremity elevation (LEE) will reduce the incidence of postinduction hypotension, to compare the utilization of vasoactive medications after induction in patients with LEE and patients without LEE and to determine if LEE will increase measured cardiac output
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
200
Patients will be in supine position during induction with a 12" wedge placed at the level of the Achilles tendon (LEE)
The University of Texas Health Science Center at Houston
Houston, Texas, United States
RECRUITINGNumber of participants that demonstrate hypotension
Hypotension is defined as the reduction in mean arterial pressure by 20% or greater comparing the blood pressure measured before induction of anesthesia
Time frame: From start of anesthesia upto institution of positive pressure ventilation (about 5 minutes)
Number of participants that demonstrate Nadir blood pressure
Nadir blood pressure is the lowest value of blood pressure (BP) that can occur
Time frame: From start of anesthesia upto institution of positive pressure ventilation (about 5 minutes)
Change in heart rate
Time frame: From start of anesthesia upto institution of positive pressure ventilation (about 5 minutes)
Number of participants that need rescue vasoactive agents
Time frame: From start of anesthesia upto institution of positive pressure ventilation (about 5 minutes)
Accumulated dose of rescue vasoactive agents
Time frame: End of study (within 15 minutes of baseline)
Change in non-invasive cardiac output
Time frame: From start of anesthesia upto institution of positive pressure ventilation (about 5 minutes)
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