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Your search keyword '"Oyama, Norihiko"' showing total 20 results
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20 results on '"Oyama, Norihiko"'

3. Sparing effect of tramadol, lidocaine, dexmedetomidine and their combination on the minimum alveolar concentration of sevoflurane in dogs

Author

El-Hawari, Sayed Fathi, Oyama, Norihiko, Koyama, Yukako, Tamura, Jun, Itami, Takaharu, Sano, Tadashi, Yamashita, Kazuto, El-Hawari, Sayed Fathi, Oyama, Norihiko, Koyama, Yukako, Tamura, Jun, Itami, Takaharu, Sano, Tadashi, and Yamashita, Kazuto

Abstract

Background: Problems associated with using inhalational anaesthesia are numerous in veterinary anaesthesia practice. Decreasing the amount of used inhalational anaesthetic agents and minimising of cardiorespiratory disorders are the standard goals of anaesthetists. Objective: This experimental study was carried out to investigate the sparing effect of intravenous tramadol, lidocaine, dexmedetomidine and their combinations on the minimum alveolar concentration (MAC) of sevoflurane in healthy Beagle dogs. Methods: This study was conducted on six beagle dogs. Sevoflurane MAC was determined by the tail clamp method on five separate occasions. The dogs received no treatment (control; CONT), tramadol (TRM: 1.5 mg kg(-1) intravenously followed by 1.3 mg kg(-1) h(-1)), lidocaine (LID: 2 mg kg(-1) intravenously followed by 3 mg kg(-1) h(-1)), dexmedetomidine (DEX: 2 mu g kg(-1) intravenously followed by 2 mu g kg(-1) h(-1)), and their combination (COMB), respectively. Cardiorespiratory variables were recorded every five minutes and immediately before the application of a noxious stimulus. Results: The COMB treatment had the greatest sevoflurane MAC-sparing effect (67.4 +/- 13.9%) compared with the other treatments (5.1 +/- 25.3, 12.7 +/- 14.3, and 40.3 +/- 15.1% for TRM, LID, and DEX treatment, respectively). The cardiopulmonary variables remained within the clinically acceptable range following COMB treatment, although the mean arterial pressure was higher and accompanied by bradycardia. Conclusions: Tramadol-lidocaine-dexmedetomidine co-infusion produced a remarkable sevoflurane MAC-sparing effect in clinically healthy beagle dogs and could result in the alleviation of cardiorespiratory depression caused by sevoflurane. Cardiorespiratory variables should be monitored carefully to avoid undesirable side effects induced by dexmedetomidine.

Published
2022

4. Surgical removal of cataract in an Asiatic black bear (Ursus thibetanus) by phacoemulsification and aspiration

Author

MAEHARA, Seiya, MATSUMOTO, Naoya, TAKIYAMA, Naoaki, ITOH, Yoshiki, KITAMURA, Yasunari, YAMASHITA, Kazuto, SANO, Tadashi, ITAMI, Takaharu, OYAMA, Norihiko, HAYASHI, Miri, KATO, Reiko, SHIMODE, Arisa, and MASUKO, Arisa

Subjects
Male, Ursus thibetanus, Phacoemulsification, genetic structures, food and beverages, Wildlife Science, Note, eye diseases, phacoemulsification and aspiration, cataract, Animals, sense organs, bear, Ursidae
Abstract

A twenty-year-old male Asiatic black bear (Ursus thibetanus) presented at the Rakuno Gakuen University Animal Medical Center with a 10-year history of bilateral blindness and cataracts. Surgical treatment of bilateral cataracts by extracapsular lensextraction using phacoemulsification and aspiration (PEA) was performed under general anesthesia. An anterior capsulectomy was performed using micro iris scissors and micro anterior lens capsule forceps. The cataract was removed with PEA using the two-handed technique. After surgery, systemic corticosteroids, anti-inflammatory drugs and antibiotics were administered. After cataract removal, the bear had recovered vision, and good quality vision has been maintained to date (15 months). PEA can be a safe and effective treatment for cataracts that impair vision in bears.

Published
2020

19. Clinical Evaluation of Intraoperative Multimodal Analgesia Using Constant Rate Infusion of Morphine-Lidocaine-Ketamine Drug Combination in Dogs Undergoing Hemilaminectomy

Author

ITAMI, Takaharu, primary, KUMAMOTO, Natsuko, additional, ISHIZUKA, Tomohito, additional, TAMURA, Jun, additional, FUKUI, Sho, additional, OYAMA, Norihiko, additional, KAWASE, Kodai, additional, MIYOSHI, Kenjiro, additional, SANO, Tadashi, additional, UENO, Hiroshi, additional, IZUMISAWA, Yasuharu, additional, and YAMASHITA, Kazuto, additional

Published
2013
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20. Successful treatment of acute respiratory failure following hypertensive crisis in a dog with presumed pheochromocytoma or paraganglioma.

Author

Tamura J, Yoshida S, Nagata N, Shimbo G, and Oyama N

Subjects
Humans, Dogs, Male, Animals, Pheochromocytoma complications, Pheochromocytoma diagnosis, Pheochromocytoma therapy, Pheochromocytoma veterinary, Hypertensive Crisis veterinary, Pulmonary Edema diagnosis, Pulmonary Edema etiology, Pulmonary Edema therapy, Pulmonary Edema veterinary, Adrenal Gland Neoplasms complications, Adrenal Gland Neoplasms diagnosis, Adrenal Gland Neoplasms therapy, Adrenal Gland Neoplasms veterinary, Respiratory Insufficiency diagnosis, Respiratory Insufficiency etiology, Respiratory Insufficiency therapy, Respiratory Insufficiency veterinary, Dog Diseases diagnosis, Dog Diseases etiology, Dog Diseases therapy
Abstract

Background: Acute respiratory failure has been reported as one of the manifestations of hypertensive crisis in pheochromocytoma in human medicine. In dogs, no reports have been described as acute respiratory failure following hypertensive crisis. Here, we report the clinical presentation, course, and treatment of acute respiratory failure following the hypertensive crisis in a dog with presumed pheochromocytoma or paraganglioma., Case Description: A 12-year-old neutered male toy poodle was referred for the diagnostic evaluation of a right adrenal gland mass. The dog suddenly exhibited severe dyspnea with abnormal hypertension (systolic blood pressure >200 mmHg) 15 minutes after recovery from the anesthesia for the computed tomography (CT) examination. Pulmonary CT and ultrasonography findings suggested acute onset of severe pulmonary edema. Pulmonary edema was treated with mechanical ventilation (pressure-support ventilation with continuous positive airway pressure) and negative fluid balance after the administration of furosemide. Weaning from mechanical ventilation was successful 24 hours after the onset of respiratory failure. Finally, the dog was discharged 3 days after weaning from ventilation without complications., Conclusion: This report outlines a case of acute respiratory failure following a hypertensive crisis requiring mechanical ventilatory management in a dog. The onset and progression of pulmonary edema were extremely rapid. However, improvement in pulmonary edema was also rapid. Hemodynamic stability, in addition to prompt diagnosis and aggressive therapeutic intervention, including mechanical ventilation, may have contributed to the good prognosis of pulmonary edema following hypertensive crisis in a dog, which we attribute to a catecholamine storm., Competing Interests: The authors declare that there is no conflict of interest.

Published
2023
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