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Anesth Analg 2005;100:1289-1294
© 2005 International Anesthesia Research Society
doi: 10.1213/01.ANE.0000149591.67207.05

PEDIATRIC ANESTHESIA

A Comparison of the Vasotrac with Invasive Arterial Blood Pressure Monitoring in Children After Pediatric Cardiac Surgery

Clifford L. Cua, MD, Kristi Thomas, RN, David Zurakowski, PhD, and Peter C. Laussen, MBBS

Departments of Cardiology and Orthopaedic Surgery, Children’s Hospital Boston, Boston, Massachusetts

Address correspondence and reprint requests to Peter C. Laussen, MBBS, Department of Cardiology, Children’s Hospital Boston, 300 Longwood Avenue, Boston, MA 02115. Address e-mail to peter.laussen{at}cardio.chboston.org.

The Vasotrac is a device that provides near-continuous and noninvasive arterial blood pressure monitoring and may be an alternative to direct intraarterial measurement. It has been evaluated in adult patients, but minimal information is available for pediatric patients. We evaluated agreement between measurements of arterial blood pressure and heart rate obtained from the Vasotrac versus an arterial catheter in a pediatric population. Children undergoing corrective cardiac surgery were enrolled. Simultaneous arterial blood pressure measurements were obtained postoperatively from the Vasotrac unit and an arterial catheter. Bland-Altman plots were constructed to assess agreement. Paired correlation analysis, bias, and precision calculations were performed.

Sixteen patients, mean age 10.1 ± 2.3 yr and weight 34.6 ± 11.9 kg, were enrolled. Four-thousand-one- hundred- two paired measurements were obtained. Arterial blood pressures measured noninvasively correlated with catheter measurements with Pearson r values of 0.90, 0.80, and 0.91 for systolic, diastolic, and mean arterial blood pressures, respectively (all P < 0.001). There was excellent agreement between arterial blood pressure measurement methods. Absolute mean differences based on mixed-model regression with 95% confidence intervals were 4.0 mm Hg (3.0–5.0 mm Hg), 4.3 mm Hg (3.1–5.5 mm Hg), and 3.5 mm Hg (2.5–4.0 mm Hg) for systolic blood pressure, diastolic blood pressure, and mean blood pressure, respectively. Arterial blood pressure measurements obtained from the Vasotrac agreed well with invasive arterial monitoring in pediatric patients.




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Lippincott, Williams & Wilkins Anesthesia & Analgesia® is published for the International Anesthesia Research Society® by Lippincott Williams & Wilkins with the assistance of Stanford University Libraries' HighWire Press®. Copyright 2006 by the International Anesthesia Research Society. Online ISSN: 1526-7598   Print ISSN: 0003-2999 HighWire Press
Copyright © 2005 by the International Anesthesia Research Society.