Document Detail

Technical abilities and limitations of acoustic rhinometry optimised for infants.
MedLine Citation:
PMID:  9830673     Owner:  NLM     Status:  MEDLINE    
The objective of this model study was to validate in detail the technical capabilities as well as the limitations of a new rhinometric probe optimised for infants in order to improve reliability of measurements and reduce the risk of misleading conclusions. The repeatability was excellent (CV < 0.6%) and the reproducibility was high (CV% < 4%) provided the ambient conditions were fairly stable. The repeatability declined when external noise levels were above 60 dB SPL, and variation in temperature and pressure reduce reproducibility. The accuracy of the minimum cross-sectional area (MCA) as well as the volume corresponding to the nasal cavity in infants (VOL4), was acceptable (% error < 12%) as long as the MCA was larger than 30-40% of the probe dimensions and the cross-sectional area of the cavity posterior to the MCA did not exceed the MCA by a factor of more than 3-4. Variation in the position of the MCA within the anterior 2 cm has minimal influence on the posterior measurements provided the shape and length of the MCA are unaltered. Rods inserted into the tubular model to simulate the slit-like shape of the nasal passage did not reduce the accuracy, which is essential to the clinical value of acoustic rhinometry. Recommendations and guidelines designed to enhance the reliability of acoustic measurements in infants are presented.
P G Djupesland; B Lyholm
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Rhinology     Volume:  36     ISSN:  0300-0729     ISO Abbreviation:  Rhinology     Publication Date:  1998 Sep 
Date Detail:
Created Date:  1999-01-27     Completed Date:  1999-01-27     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0347242     Medline TA:  Rhinology     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  104-13     Citation Subset:  IM    
Department of Otorhinolaryngology, Ullevaal University Hospital, Oslo, Norway.
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MeSH Terms
Acoustics / instrumentation
Anatomy, Cross-Sectional
Equipment Design
Infant, Newborn
Models, Anatomic
Nasal Cavity / anatomy & histology*
Otolaryngology / instrumentation
Reproducibility of Results

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