Document Detail

An optical oscillometric method for neonatal and premature infant blood pressure monitoring.
MedLine Citation:
PMID:  19363328     Owner:  NLM     Status:  MEDLINE    
PURPOSE: A preliminary study of a new optical oscillometric method to noninvasively measure systolic, mean, and diastolic blood pressures, in addition to heart and respiratory rates in very small extremities, is described. It employs transillumination of an extremity and measures the optical oscillation amplitude during cuff deflation from suprasystolic to zero pressure. The amplitude of the optical pulsatile oscillations is similar to that produced with the conventional pneumatic oscillometric method; however, the pulsatile optical signal is much larger and is present at all times when the cuff is deflated. METHODS AND DESIGN: Two types of blood pressure verification studies were performed: (1) a weanling piglet study using a weanling piglet tail and (2) a human study using the little fingers of adult participants. For the weanling piglet study, direct femoral artery pressure, tail-cuff pressure, and optical oscillations were recorded in 5 anesthetized weanling piglets ranging in weight from 2 to 4 kg. Ten measurements were made in the pressure range of 30 to 175 mm Hg. For human study, data were obtained from 23 adult participants of both sexes with a little finger circumference of 4 cm or less. Radial artery pressure, measured with the conventional pneumatic oscillometric method, was used as the standard and was compared with the simultaneous optical oscillometric pressure in the little finger of the opposite arm. MAIN OUTCOME MEASURES: This is an initial study demonstrating the optical oscillometric technique as a viable alternative for noninvasive blood pressure measurement in low birth-weight infants. PRINCIPAL RESULTS: The weanling piglet data show a high correlation between direct arterial pressure and this new optical oscillometric method over a pressure range of approximately 30 to 175 mm Hg. The correlation coefficients of linear regression were 0.93, 0.93, and 0.91, respectively. The human little finger data show a high correlation between the pneumatic oscillometric mean arterial pressure and this new optical oscillometric method over a pressure range of approximately 40 to 140 mm Hg. The correlation coefficient of linear regression was 0.87. CONCLUSIONS: This new optical oscillometric technique simplifies noninvasive blood pressure measurement because it was designed specifically for small-diameter extremities such as those found in low birth-weight infants. This new optical oscillometric device has the added benefit of continually monitoring pulse and respiration rates.
Rebecca A Roeder; Leslie A Geddes
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Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Advances in neonatal care : official journal of the National Association of Neonatal Nurses     Volume:  9     ISSN:  1536-0903     ISO Abbreviation:  Adv Neonatal Care     Publication Date:  2009 Apr 
Date Detail:
Created Date:  2009-04-13     Completed Date:  2009-05-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101125644     Medline TA:  Adv Neonatal Care     Country:  United States    
Other Details:
Languages:  eng     Pagination:  77-81     Citation Subset:  IM    
Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, USA.
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MeSH Terms
Blood Pressure Determination / instrumentation*,  methods*,  standards
Brachial Artery
Fingers / physiology
Infant, Low Birth Weight / physiology*
Infant, Newborn
Infant, Premature / physiology*
Linear Models
Optical Devices
Oscillometry / instrumentation*,  methods*
Radial Artery / physiology
Swine / physiology
Tail / physiology
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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