Preoperative dexmedetomidine attenuates hemodynamic responses to hydrodissection in patients undergoing robotic thyroidectomy
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- 作者：Mae-Hwa Kang ; Ho-Jin Lee ; Young-Jin Lim ; Young-Tae Jeon…
- 关键词：Dexmedetomidine ; Robot ; assisted thyroidectomy ; Hemodynamic response ; Remifentanil ; Hydrodissection
- 刊名：Journal of Anesthesia
- 出版年：2015
- 出版时间：April 2015
- 年：2015
- 卷：29
- 期：2
- 页码：191-197
- 全文大小：529 KB
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- 刊物主题：Medicine & Public Health
Anesthesiology - 出版者：Springer Japan
- ISSN：1438-8359
文摘
Purpose Percutaneous tunneling (hydrodissection) in the neck and anterior chest in patients undergoing robotic thyroidectomy leads to significant hemodynamic responses such as increases in blood pressure and heart rate. We evaluated whether a single preoperative dexmedetomidine injection attenuated hemodynamic responses to hydrodissection by reducing the half-maximal effective concentration (EC50) of remifentanil needed to maintain hemodynamic stability during hydrodissection. Methods Forty-one patients undergoing robot-assisted endoscopic thyroidectomy were randomly allocated to one of the two groups—group D (n?=?22) and group C (n?=?19) patients received dexmedetomidine 1?μg/kg and normal saline for 10?min before anesthetic induction, respectively. The EC50 of remifentanil for hemodynamic stability during hydrodissection was determined using Dixon’s up-and-down method with initial dose (4?and 5?ng/mL in groups D and C, respectively). The concentration of remifentanil for consecutive patients in each group was determined by the response of the previous patient, using increments or decrements of 0.5?ng/mL. Hemodynamic stability during hydrodissection was defined as increased systolic blood pressure Results The EC50 of remifentanil for maintaining hemodynamic stability during hydrodissection was 0.8?ng/mL in group D and 7.3?ng/mL in group C (p?=?0.002). Conclusions A single preoperative dexmedetomidine injection attenuated hydrodissection-induced hemodynamic responses in patients undergoing robotic thyroidectomy.