SELECTIVE MECHANICAL VENTILATION OF DEPENDENT LUNG REGIONS IN THE ANAESTHETIZED HORSE IN DORSAL RECUMBENCY

The effects of selective mechanical ventilation of dependent lung regions were studied in anaesthetized horses (mean weight 486 kg) in dorsal recumbency. Blood-gas measurements were performed with the horse in the lateral position during spontaneous breathing (before selective intubation) and in dor...

Full description

Saved in:
Bibliographic Details
Published in:British journal of anaesthesia : BJA 1987-08, Vol.59 (8), p.1027-1034
Main Authors: NYMAN, G., FROSTELL, C., HEDENSTIERNA, G., FUNKQUIST, B., KVART, C., BLOMQVIST, H.
Format: Article
Language:English
Subjects:
Anesthesia
Anesthesia depending on patient's condition
Anesthesia, General - veterinary
Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy
Animals
Biological and medical sciences
Female
Horses - physiology
Lung - physiology
Male
Medical sciences
Oxygen - blood
Positive-Pressure Respiration - veterinary
Posture
Pulmonary Gas Exchange
Respiration, Artificial - methods
Respiration, Artificial - veterinary
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The effects of selective mechanical ventilation of dependent lung regions were studied in anaesthetized horses (mean weight 486 kg) in dorsal recumbency. Blood-gas measurements were performed with the horse in the lateral position during spontaneous breathing (before selective intubation) and in dorsal recumbency during spontaneous breathing, general mechanical ventilation, and spontaneous breathing +selective mechanical ventilation. Arterial oxygen tension (PaO2) was 32.3 kPa in the lateral position during spontaneous breathing with a high inspired oxygen fraction (FlO2 >92%). In dorsal recumbency PaO2 decreased to 10.9 kPa during spontaneous breathing and was not significantly affected by general mechanical ventilation (PaO2 12.6 kPa). The institution of selective mechanical ventilation with a selective positive end-expiratory pressure (PEEP) of 20 cm H2O caused a marked increase in PaO2 to an average of 35.3 kPa. It is concluded that selective intubation of dependent regions in the diaphragmatic lobes is a feasible procedure and that selective mechanical ventilation with PEEP markedly improves arterial oxygenation in the anaesthetized horse in dorsal recumbency.
ISSN:0007-0912
1471-6771
DOI:10.1093/bja/59.8.1027