Surgery
Conditions
Brief summary
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.
Interventions
DEVICEAnkle Non-invasive Blood pressure measurement
Non-invasive blood pressure measured simultaneously at the arm (model IntelliVue M8105a MP5 Phillips, calibrated).
DEVICEArm Non-invasive Blood pressure measurement
Non-invasive blood pressure measured simultaneously at the ankle (model IntelliVue M8105a MP5 Phillips, calibrated).
Sponsors
Philippe VAN DER LINDEN
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
15 Years to 40 Years
Healthy volunteers
No
Inclusion criteria
* American Society of Anesthesiology (ASA) pysical status score 1 * Patient undergoing elective surgery requiring general anesthesia in supine position
Exclusion criteria
* Patient refusal * systemic pathology * Body mass index (BMI) superior to 30 * Surgeon requiring a position other than supine
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Ankle Brachial non-invasive blood pressure difference - time point 6 | 1 day | Difference between the non-invasive blood pressure measured at the ankle and at the arm, at reversal of anesthesia |
| Ankle Brachial non-invasive blood pressure difference - time point 3 | 1 day | Difference between the non-invasive blood pressure measured at the ankle and at the arm, after securing airway |
| Ankle Brachial non-invasive blood pressure difference - time point 4 | 1 day | Difference between the non-invasive blood pressure measured at the ankle and at the arm, at surgical incision |
| Ankle Brachial non-invasive blood pressure difference - time point 5 | 1 day | Difference between the non-invasive blood pressure measured at the ankle and at the arm, 10 minutes after surgical incision |
| Ankle Brachial non-invasive blood pressure difference - time point 1 | 1 day | Difference between the non-invasive blood pressure measured at the ankle and at the arm, before induction of anesthesia |
| Ankle Brachial non-invasive blood pressure difference - time point 2 | 1 day | Difference between the non-invasive blood pressure measured at the ankle and at the arm, after induction of anesthesia |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Pain at the ankle (yes/no) | 1 day | Answer 'yes' or 'no' to the question 'pain at the ankle' in postoperative period |
| Ankle Brachial NIBP difference variation | 1 day | Determine if Ankle Brachial NIBP difference remains constant or varies during different intraoperative periods |
| Pain at the arm (yes/no) | 1 day | Answer 'yes' or 'no' to the question 'pain at the arm' in postoperative period |
Countries
Belgium
Outcome results
None listed