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Myung Ha Yoon 2 Articles
Vocal Cord Paralysis after the Coronary Artery Bypass Graft: A Case Report
Kwang Su Kim, Seong Wook Jeong, Sang Hyun Kwak, Myung Ha Yoon, Kyung Yeon Yoo, Chang Young Jeong, Sung Su Chung
Korean J Crit Care Med. 2005;20(2):170-173.
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AbstractAbstract PDF
Surgical trauma has long been recognized as the most common cause of unilateral and bilateral vocal cord paralysis. We experienced a case of bilateral vocal cord paralysis after off-pump coronary artery bypass graft. The patient was repeated intubation and extubation after operation in surgical intensive care unit. Fiberoptic bronchoscopy revealed bilateral vocal cord paralysis in the patient. The patient recovered after permanent tracheotomy. We reported a case of vocal cord paralysis after coronary artery bypass graft.
Effects of Alfentanil on Hemodynamic and Catecholamine Responses to Laryngoscopy and Endobronchial Intubation in the Elderly
Kyung Yeon Yoo, Sung Su Chung, Myung Ha Yoon, Seong Wook Jeong, Jeong Il Choi, Chang Young Jeong
Korean J Crit Care Med. 2005;20(2):114-120.
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  • 14 Download
AbstractAbstract PDF
BACKGROUND
Endobronchial intubation should elicit significant circulatory responses. We examined the effects of alfentanil on hemodynamic and catecholamine responses to endobronchial intubation in elderly patients. METHODS: A total of 60 patients aged over 60 years requiring endobronchial intubation were randomized into three groups of 20 patients each. Anesthesia was induced with thiopental 4~6 mg/kg followed by saline (placebo) or alfentanil 10 or 30microgram/kg given as a bolus over 30 s. Succinylcholine 1 mg/kg was given for neuromuscular block. Laryngoscopy and intubation were performed 1 min later. RESULTS: The intubation significantly increased systolic arterial pressure and heart rate. The maximum pressure changes from pre-intubation values in both alfentanil groups (58+/-27 and 33+/-30 mm Hg in 10 and 30microgram/kg, respectively) were significantly lower compared with that of 83+/-35 mm Hg in the control group. The tachycardiac response was not significantly affected by alfentanil 10microgram/kg, but attenuated by alfentanil 30microgram/kg. The plasma norepinephrine concentrations were increased, which was not affected by alfentanil 10microgram/kg, but was significantly attenuated by alfentanil 30microgram/kg. Both doses of alfentanil abolished the increase of plasma epinephrine concentrations. Three patients in the 30microgram/kg group received ephedrine for hypotension. CONCLUSIONS: This study showed that endobronchial intubation elicited significant pressor response, and that alfentanil 30microgram/kg is more efficacious in attenuating the hemodynamic and catecholamine responses, although potential hypotension warrants a caution of its use, in elderly patients.

ACC : Acute and Critical Care