Anesthetic and cardiovascular effects of balanced anesthesia using constant rate infusion of midazolam-ketamine-medetomidine with inhalation of oxygen-sevoflurane (MKM-OS anesthesia) in horses
| Autor: | Tokiko Kushiro, Yasuharu Izumisawa, William W. Muir, Keiko Tsuzuki, Takahiro Seno, Shinsuke Wakaiki, Reona Abe, Mohammed A. Umar, Kazuto Yamashita, Seiya Maehara |
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| Rok vydání: | 2005 |
| Předmět: |
Methyl Ethers
Cardiac output Midazolam Blood Pressure Sevoflurane Intermittent Positive-Pressure Ventilation Heart Rate medicine Animals Ketamine Horses Cardiac Output General Veterinary Balanced Anesthesia business.industry Respiration Carbon Dioxide Medetomidine Anesthetics Combined Oxygen Blood pressure Anesthesia Anesthetic Anesthesia Intravenous business Anesthesia Inhalation medicine.drug |
| Zdroj: | The Journal of veterinary medical science. 67(4) |
| ISSN: | 0916-7250 |
| Popis: | The anesthetic sparring and cardiovascular effects produced by midazolam 0.8 mg/ml-ketamine 40 mg/ml-medetomidine 0.05 mg/ml (0.025 ml/kg/hr) drug infusion during sevoflurane in oxygen (MKM-OS) anesthesia was determined in healthy horses. The anesthetic sparring effects of MKM-OS were assessed in 6 healthy thoroughbred horses in which the right carotid artery was surgically relocated to a subcutaneous position. All horses were intubated and ventilated with oxygen using intermittent positive pressure ventilation (IPPV). The end-tidal concentration of sevoflurane (ET(SEV)) required to maintain surgical anesthesia was approximately 1.7%. Heart rate and mean arterial blood pressure averaged 23-41 beats/min and 70-112 mmHg, respectively. All horses stood between 23-44 min after the cessation of all anesthetic drugs. The cardiovascular effects of MKM-OS anesthesia were evaluated in 5 healthy thoroughbred horses ventilated using IPPV. Anesthesia was maintained for 4 hr at an ET(SEV) of 1.7%. Each horse was studied during left lateral (LR) and dorsal recumbency (DR) with a minimum interval between evaluations of 1 month. Cardiac output and cardiac index were maintained between 70-80% of baseline values during LR and 65-70% of baseline values during DR. Stroke volume was maintained between 75-85% of baseline values during LR and 60-70% of baseline values during DR. Systemic vascular resistance was not different from baseline values regardless of position. MKM-OS anesthesia may be useful for prolonged equine surgery because of its minimal cardiovascular depression in both of lateral and dorsal recumbency. |
| Databáze: | OpenAIRE |
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