Faculty Collaboration Database

Patients at risk for low systemic oxygen delivery after the Norwood procedure. Ann Thorac Surg 2000 Jun;69(6):1893-9

Date

07/13/2000

Pubmed ID

10892943

DOI

10.1016/s0003-4975(00)01349-7

Scopus ID

2-s2.0-0033947377 (requires institutional sign-in at Scopus site)   93 Citations

Abstract

BACKGROUND: Identification of patients at risk for inadequate systemic oxygen delivery following the Norwood procedure could allow for application of more intensive monitoring, provide for earlier intervention of decreased cardiac output, and result in improved outcome.

METHODS AND RESULTS: Superior vena cava saturation (SvO2) and arteriovenous oxygen content difference were prospectively monitored as indicators of systemic oxygen delivery and recorded hourly for the first 48 hours in 29 of 33 consecutive patients following the Norwood procedure. Risk factors were evaluated using multiple linear regression to determine their impact on SvO2 and arteriovenous oxygen content difference. Age less than 8 days, weight less than 2.5 kg, aortic atresia, and prolonged cardiopulmonary bypass time were risk factors for low SvO2 and wide arteriovenous oxygen content difference (p < 0.05). Phenoxybenzamine and increasing time after operation were associated with higher SvO2 and narrower arteriovenous oxygen content difference (p < 0.05). Thirty-day survival was 97% and hospital survival was 94%. The earliest death occurred on postoperative day 20. Survival to bidirectional cavopulmonary shunt was 77%. Preoperative mechanical ventilation was the only risk factor identified for late death.

CONCLUSIONS: Aortic atresia, low weight, younger age, and prolonged cardiopulmonary bypass, previously identified risk factors for mortality, were associated with decreased SvO2 and narrower arteriovenous oxygen content difference in the early postoperative period. The impact of this hemodynamic vulnerability on mortality was minimized by continuous SvO2 monitoring.

Author List

Tweddell JS, Hoffman GM, Fedderly RT, Ghanayem NS, Kampine JM, Berger S, Mussatto KA, Litwin SB

Authors

Raymond T. Fedderly MD Associate Professor in the Pediatrics department at Medical College of Wisconsin
George M. Hoffman MD Chief, Professor in the Anesthesiology department at Medical College of Wisconsin
Kathleen Mussatto Ph.D. Associate Professor in the School of Nursing department at Milwaukee School of Engineering

MESH terms used to index this publication - Major topics in bold

Cardiac Output, Low
Female
Humans
Hypoplastic Left Heart Syndrome
Hypoxia
Infant
Infant, Newborn
Male
Oxygen
Palliative Care
Postoperative Complications
Prospective Studies
Risk Factors
Survival Rate