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Cardiac Output in Neonates, Noninvasively
Author(s) -
Weaver Barbara Smith,
Rodriquez Misael,
Bozeman Andrew,
Vogel Robert
Publication year - 2009
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.23.1_supplement.lb55
Subject(s) - medicine , body surface area , reproducibility , cardiac output , systole , cardiology , diastole , stroke volume , ascending aorta , blood pressure , ejection fraction , hemodynamics , aorta , mathematics , heart failure , statistics
Cardiac Output in Neonates, Noninvasively Barbara Weaver, R.N. 1 , Misael Rodriguez, M.D. 1 , Robert L. Vogel, PhD. 2 , Andrew P. Bozeman, M.D. 2 , and Joseph M. Van De Water, M.D. 2 Departments of 1 Pediatrics and 2 Surgery, Mercer University School of Medicine at the Medical Center of Central Georgia, Macon, GA, 31201. Our objective was to assess a new noninvasive monitor for measuring cardiac output (CO) in neonates down to 590 grams. We used a new electrical impedance device, Aesculon® (Cardiotronic, Inc., 7855 Ivanhoe Avenue, Suite 226, La Jolla, CA 92037). The technology, Electrical Cardiometry, measures the differences in impedance presumably originating in red blood cell orientation between systole and diastole in the ascending and descending thoracic aorta in order to derive stroke volume (SV). Measurements on 75 neonates, ranging in weight from 590 to 4010 grams, were evaluated. Intra‐ and inter‐operator reproducibility was assessed from a sample of subjects. The correlation of both CO and SV to body mass (wt), body mass index (BMI) and body surface area (BSA) was computed. There were no problems using single electrode placement along the left side of the body at scalp, base of neck, xyphoid and thigh levels. Babys' tolerance was good and device operation was easy, facilitating parental consent. Reproducibility was good with a variance component for operator of less than 1% and for time of less than ½% of total variability for both CO and SV. Standards for CO in this sample of neonates (n = 75) correlated equally well with wt, BMI and BSA (r = 0.89, p = 0.0001). However, the best correlation was SV vs. wt and BSA (r = 0.93, p = 0.0001). This study suggests that a very useful noninvasive neonatal CO monitor now exists.