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English Abstract
Journal Article
[Predictive analysis for myasthenic crisis after transsternal thymectomy in patients with myasthenia gravis].
Masui. the Japanese Journal of Anesthesiology 2012 Februrary
BACKGROUND: The risk factors for postoperative myasthenic crisis (MC) in patients with myasthenia gravis (MG) receiving preoperative corticosteroids were unknown.
METHODS: Sixty-three consecutive patients who had undergone a transsternal thymectomy for MG were retrospectively analyzed. Of these, 59 patients (93.7%) received preoperative corticosteroids (prednisolone 1-2 mg x kg(-1)) every-other day. In this study, our definition of postoperative-MC was the need for prolonged postoperative mechanical ventilation for more than 48 hours. Six patients (9.5%) met this criterion. The patient background, and preoperative as well as intraoperative management were evaluated to identify risk factors for postoperative-MC.
RESULTS: Student's t-test revealed that the lengths of the operation and anesthesia were significantly longer in the postoperative-MC group compared with the control group (P < 0.05). Fisher's exact test revealed that the existence of preoperative bulbar symptoms and incomplete resection of the thymus gland were also more common in the postoperative-MC group (P < 0.05). A logistic regression analysis revealed that the existence of preoperative bulbar symptoms was the only significant risk factor for postoperative-MC.
CONCLUSIONS: Based on this study, we concluded that the existence of preoperative bulbar symptoms seems to be a predictor for the development of postoperative-MC in patients with MG undergoing a transsternal thymectomy.
METHODS: Sixty-three consecutive patients who had undergone a transsternal thymectomy for MG were retrospectively analyzed. Of these, 59 patients (93.7%) received preoperative corticosteroids (prednisolone 1-2 mg x kg(-1)) every-other day. In this study, our definition of postoperative-MC was the need for prolonged postoperative mechanical ventilation for more than 48 hours. Six patients (9.5%) met this criterion. The patient background, and preoperative as well as intraoperative management were evaluated to identify risk factors for postoperative-MC.
RESULTS: Student's t-test revealed that the lengths of the operation and anesthesia were significantly longer in the postoperative-MC group compared with the control group (P < 0.05). Fisher's exact test revealed that the existence of preoperative bulbar symptoms and incomplete resection of the thymus gland were also more common in the postoperative-MC group (P < 0.05). A logistic regression analysis revealed that the existence of preoperative bulbar symptoms was the only significant risk factor for postoperative-MC.
CONCLUSIONS: Based on this study, we concluded that the existence of preoperative bulbar symptoms seems to be a predictor for the development of postoperative-MC in patients with MG undergoing a transsternal thymectomy.
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