Endoscopic anatomy and map of the equine bronchial tree.

B. L. Smith, E. Aguilera-Tejero, W. S. Tyler, James H Jones, W. J. Hornof, John Pascoe

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

To develop a bronchoscopic map of the equine respiratory tree, the major airways of the lungs of 6 healthy Thoroughbred horses were systematically explored with a flexible fibreoptic endoscope through a tracheostomy while the horses were sedated in stocks. With the carina as the reference point, measurements were made of distances to the branches of the major airways using markers on the shaft of the endoscope. All branches were explored until the narrowing of their diameters prevented further advancement of the endoscope. Positions of origins of branches from the parent bronchus were recorded in relation to a 12 h clock. Branching patterns of the right and left lungs were similar. Seventeen branches of the principal and caudal lobar bronchi of the left lung, and 18 branches of the principal and caudal lobar bronchi of the right lung were identified. Mean explorable distances from the carina to the ends of the right and left caudal lobar bronchi were 34.0 +/- 3.5 (sd) and 34.5 +/- 3.0 cm, respectively. Generally, smaller horses had shorter explorable bronchial lengths. Branching patterns of the parent bronchi were fairly consistent among horses, particularly the branches closest to the carina. After endoscopy and euthanasia, the lungs were removed, and dried with pressurised air flowing through them for 7-10 days. Attempts to explore the airways of the dried lungs endoscopically were relatively unsuccessful, because airways were much smaller in the dried lungs, and many of the branches were distorted when compared with their antemortem appearances. However, having a dried lung specimen as a reference during the bronchoscopic procedure was useful for maintaining orientation in the lungs. Radiographs were used to estimate the location of the origin and destination of each airway branch in relation to the nearest intercostal space. This makes the airway map useful when lesions identified radiographically are to be lavaged.

Original languageEnglish (US)
Pages (from-to)283-290
Number of pages8
JournalEquine Veterinary Journal
Volume26
Issue number4
StatePublished - Jul 1994

Fingerprint

Horses
Anatomy
lungs
bronchi
horses
Lung
Bronchi
endoscopes
Endoscopes
branching
Compressed Air
Euthanasia
endoscopy
Tracheostomy
euthanasia
lesions (animal)
Endoscopy
air

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Smith, B. L., Aguilera-Tejero, E., Tyler, W. S., Jones, J. H., Hornof, W. J., & Pascoe, J. (1994). Endoscopic anatomy and map of the equine bronchial tree. Equine Veterinary Journal, 26(4), 283-290.

Endoscopic anatomy and map of the equine bronchial tree. / Smith, B. L.; Aguilera-Tejero, E.; Tyler, W. S.; Jones, James H; Hornof, W. J.; Pascoe, John.

In: Equine Veterinary Journal, Vol. 26, No. 4, 07.1994, p. 283-290.

Research output: Contribution to journalArticle

Smith, BL, Aguilera-Tejero, E, Tyler, WS, Jones, JH, Hornof, WJ & Pascoe, J 1994, 'Endoscopic anatomy and map of the equine bronchial tree.', Equine Veterinary Journal, vol. 26, no. 4, pp. 283-290.
Smith BL, Aguilera-Tejero E, Tyler WS, Jones JH, Hornof WJ, Pascoe J. Endoscopic anatomy and map of the equine bronchial tree. Equine Veterinary Journal. 1994 Jul;26(4):283-290.
Smith, B. L. ; Aguilera-Tejero, E. ; Tyler, W. S. ; Jones, James H ; Hornof, W. J. ; Pascoe, John. / Endoscopic anatomy and map of the equine bronchial tree. In: Equine Veterinary Journal. 1994 ; Vol. 26, No. 4. pp. 283-290.
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