Brachial non-invasive blood pressure (NIBP) monitoring is recommended as part of the American Society of Anesthesiology (ASA) basic monitoring package. Although brachial NIBP is often practical, some surgeries and patients may require NIBP measurement elsewhere (e.g. the ankle). Several studies have shown that ankle NIBP overestimates brachial NIBP measurements. Algorithms have been proposed, based on correlation studies, to estimate brachial NIBP from ankle NIBP during general anesthesia and mechanical ventilation. These algorithms, however, are based on both heterogeneous populations and surgeries. Our aim was to determine if ankle brachial NIBP difference occurs in in young ASA physical status 1 patients undergoing general anesthesia in the supine position. We also aim to determine if this difference is constant during anesthesia or if it varies according to different predefined time points.
Study Type
OBSERVATIONAL
Enrollment
25
Non-invasive blood pressure measured simultaneously at the arm (model IntelliVue M8105a MP5 Phillips, calibrated).
Non-invasive blood pressure measured simultaneously at the ankle (model IntelliVue M8105a MP5 Phillips, calibrated).
CHU Brugmann
Brussels, Belgium
Ankle Brachial non-invasive blood pressure difference - time point 1
Difference between the non-invasive blood pressure measured at the ankle and at the arm, before induction of anesthesia
Time frame: 1 day
Ankle Brachial non-invasive blood pressure difference - time point 2
Difference between the non-invasive blood pressure measured at the ankle and at the arm, after induction of anesthesia
Time frame: 1 day
Ankle Brachial non-invasive blood pressure difference - time point 3
Difference between the non-invasive blood pressure measured at the ankle and at the arm, after securing airway
Time frame: 1 day
Ankle Brachial non-invasive blood pressure difference - time point 4
Difference between the non-invasive blood pressure measured at the ankle and at the arm, at surgical incision
Time frame: 1 day
Ankle Brachial non-invasive blood pressure difference - time point 5
Difference between the non-invasive blood pressure measured at the ankle and at the arm, 10 minutes after surgical incision
Time frame: 1 day
Ankle Brachial non-invasive blood pressure difference - time point 6
Difference between the non-invasive blood pressure measured at the ankle and at the arm, at reversal of anesthesia
Time frame: 1 day
Pain at the arm (yes/no)
Answer 'yes' or 'no' to the question 'pain at the arm' in postoperative period
Time frame: 1 day
Pain at the ankle (yes/no)
Answer 'yes' or 'no' to the question 'pain at the ankle' in postoperative period
Time frame: 1 day
Ankle Brachial NIBP difference variation
Determine if Ankle Brachial NIBP difference remains constant or varies during different intraoperative periods
Time frame: 1 day
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