Although use of the Sonoclot device (Sienco, Inc., Morrison, CO) has been reported in isolated pediatric cases and in small reports in neonates, there are no published data for normal pediatric patients. As the device is used in situations of abnormal coagulation, such as cardiac and liver transplantation surgery, our aim was to determine normal data ranges in healthy pediatric surgical patients. Blood was withdrawn after anesthetic induction, and the Sonoclot activated clotting time, rate of clot formation, time to peak amplitude, and peak amplitude was compared among four pediatric groups (<12 mo, 13–24 mo, 25–48 mo, 49 mo–9 yr) and an adult group. The Sonoclot activated clotting time in the <12-mo and the Adult groups were shorter than the oldest group of children (P < 0.05), although all were within the anticipated normal range, and there were no significant differences in clot rate, peak amplitude, and time to peak amplitude among groups without apparent trends with increasing age. These Sonoclot variables quantify adequate global clot formation in pediatric patients and will facilitate clinical coagulation management with appropriate pediatric normal ranges, avoiding the application of extrapolated adult data to children.
Department of Anesthesiology, *Medical School, and †School of Public Health, University of Texas Health Science Center, Houston, Texas
Disposables for the Sonoclot device were supplied by Sienco, Inc., Morrison, CO.
Portions of this data were presented in abstract form at the American Society of Anesthesiologist’s Annual Meeting, San Diego, CA, October 1997, and has appeared as an abstract in Anesthesiology 1997: 87;A1037.
December 14, 2000.
Address correspondence and reprint requests to Evan G. Pivalizza, MBChB, FFASA, Department of Anesthesiology, Medical School, University of Texas Health Science Center, MSB 5.020, 6431 Fannin St., Houston, TX, 77030. Address e-mail to Evan.G.Pivalizza@ uth.tmc.edu.
IMPLICATIONS: Sonoclot variables are presented for 95 healthy pediatric surgical patients in four age groups, with small differences found in the Sonoclot (Sienco, Inc., Morrison, CO) activated clotting time between two groups and no significant differences in three other variables among groups.