Abstract
Objective - To determine the degree of fluctuation in tracheal dimensions between forced inspiration and passive expiration in healthy dogs of various sizes. Animals - 10 client-owned dogs with no evidence of respiratory disease or tracheal collapse. Procedures - Anesthetized dogs underwent a computed tomographic examination during forced inspiration and induced but passive expiration to assess tracheal dimensions. Tracheal height, width, and cross-sectional area were measured at inspiration and expiration, and percentage change in dimension was calculated for each variable. Results - Measurements were acquired in 10 dogs that ranged in body weight from 3.5 to 47.8 kg. Tracheal cross-sectional area at inspiration and expiration was associated with body weight at all 3 tracheal regions. The percentage change in tracheal height and cross-sectional area was associated with body weight in the cervical but not the thoracic-inlet or thoracic regions. The tracheal cross-sectional area changed by as much as 24.2% (mean, 5.5%), 20.0% (mean, 6.0%), and 18.6% (mean, 6.0%) in the cervical, thoracic-inlet, and thoracic regions, respectively. Conclusions and Clinical Relevance - The change in tracheal cross-sectional area from inspiration to expiration was as great as 24% in healthy dogs, and the area was associated with body weight. Respiratory fluctuations appeared to result in changes in tracheal dimension during respiration similar to those reported for humans.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 986-991 |
| Number of pages | 6 |
| Journal | American Journal of Veterinary Research |
| Volume | 70 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 2009 |
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ASJC Scopus subject areas
- veterinary(all)
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Changes in tracheal dimensions during inspiration and expiration in healthy dogs as detected via computed tomography. / Leonard, Caroline D.; Johnson, Lynelle R; Bonadio, Cecily M.; Pollard, Rachel E.
In: American Journal of Veterinary Research, Vol. 70, No. 8, 08.2009, p. 986-991.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Changes in tracheal dimensions during inspiration and expiration in healthy dogs as detected via computed tomography
AU - Leonard, Caroline D.
AU - Johnson, Lynelle R
AU - Bonadio, Cecily M.
AU - Pollard, Rachel E
PY - 2009/8
Y1 - 2009/8
N2 - Objective - To determine the degree of fluctuation in tracheal dimensions between forced inspiration and passive expiration in healthy dogs of various sizes. Animals - 10 client-owned dogs with no evidence of respiratory disease or tracheal collapse. Procedures - Anesthetized dogs underwent a computed tomographic examination during forced inspiration and induced but passive expiration to assess tracheal dimensions. Tracheal height, width, and cross-sectional area were measured at inspiration and expiration, and percentage change in dimension was calculated for each variable. Results - Measurements were acquired in 10 dogs that ranged in body weight from 3.5 to 47.8 kg. Tracheal cross-sectional area at inspiration and expiration was associated with body weight at all 3 tracheal regions. The percentage change in tracheal height and cross-sectional area was associated with body weight in the cervical but not the thoracic-inlet or thoracic regions. The tracheal cross-sectional area changed by as much as 24.2% (mean, 5.5%), 20.0% (mean, 6.0%), and 18.6% (mean, 6.0%) in the cervical, thoracic-inlet, and thoracic regions, respectively. Conclusions and Clinical Relevance - The change in tracheal cross-sectional area from inspiration to expiration was as great as 24% in healthy dogs, and the area was associated with body weight. Respiratory fluctuations appeared to result in changes in tracheal dimension during respiration similar to those reported for humans.
AB - Objective - To determine the degree of fluctuation in tracheal dimensions between forced inspiration and passive expiration in healthy dogs of various sizes. Animals - 10 client-owned dogs with no evidence of respiratory disease or tracheal collapse. Procedures - Anesthetized dogs underwent a computed tomographic examination during forced inspiration and induced but passive expiration to assess tracheal dimensions. Tracheal height, width, and cross-sectional area were measured at inspiration and expiration, and percentage change in dimension was calculated for each variable. Results - Measurements were acquired in 10 dogs that ranged in body weight from 3.5 to 47.8 kg. Tracheal cross-sectional area at inspiration and expiration was associated with body weight at all 3 tracheal regions. The percentage change in tracheal height and cross-sectional area was associated with body weight in the cervical but not the thoracic-inlet or thoracic regions. The tracheal cross-sectional area changed by as much as 24.2% (mean, 5.5%), 20.0% (mean, 6.0%), and 18.6% (mean, 6.0%) in the cervical, thoracic-inlet, and thoracic regions, respectively. Conclusions and Clinical Relevance - The change in tracheal cross-sectional area from inspiration to expiration was as great as 24% in healthy dogs, and the area was associated with body weight. Respiratory fluctuations appeared to result in changes in tracheal dimension during respiration similar to those reported for humans.
UR - http://www.scopus.com/inward/record.url?scp=69249122140&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=69249122140&partnerID=8YFLogxK
U2 - 10.2460/ajvr.70.8.986
DO - 10.2460/ajvr.70.8.986
M3 - Article
C2 - 19645579
AN - SCOPUS:69249122140
VL - 70
SP - 986
EP - 991
JO - American Journal of Veterinary Research
JF - American Journal of Veterinary Research
SN - 0002-9645
IS - 8
ER -