Veterinary anaesthesia and analgesia
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Randomized Controlled Trial
The cardiopulmonary effects of anesthetic induction with isoflurane, ketamine-diazepam or propofol-diazepam in the hypovolemic dog.
To evaluate and compare the cardiopulmonary effects of induction of anesthesia with isoflurane (Iso), ketamine-diazepam (KD), or propofol-diazepam (PD) in hypovolemic dogs. Study design Prospective randomized cross-over trial. ⋯ In hypovolemic dogs, KD or PD, as used in this study to induce anesthesia, resulted in less hemodynamic depression compared to isoflurane.
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Randomized Controlled Trial
The use of lingual venous blood to determine the acid-base and blood-gas status of dogs under anesthesia.
To assess the suitability of lingual venous blood (LBG) as an alternative to arterial blood (ABG) samples in determining acid-base balance and blood-gas status in dogs anesthetized for elective procedures and with medetomidine and isoflurane administration under experimental conditions. ⋯ The pH and PCO(2) of LBG samples provide clinically acceptable substitutes of ABG samples in the dog population studied. The wider limits of agreement for PO(2) render it less reliable as a substitute for ABG. The difference in PO(2) identified between LBG and ABG during medetomidine administration may not preclude the use of LBG as substitutes for ABG samples.
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Randomized Controlled Trial
Effect of morphine on the bispectral index during isoflurane anesthesia in dogs.
To assess the effect of morphine on the bispectral index (BIS) in dogs during isoflurane anesthesia maintained at a constant end-tidal concentration. ⋯ Intravenous administration of 0.5 mg kg(-1) morphine sulfate did not cause clinically significant changes in the BIS of unstimulated dogs during isoflurane anesthesia at an e'Iso of 1.81%.
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To measure the extradural pressures in goats before and after extradural injection, and to investigate the occurrence of extradural pressure waves. ⋯ Extradural pressure waves were not useful to confirm correct extradural needle placement in laterally recumbent goats. The presence of such waves after injection of 0.2 mL kg(-1) may be indicative of correct placement but even here we saw one of nine animals with extradural pressure waves where we failed to confirm correct needle placement. Extradural pressure increases after extradural injection.