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Published on: February 11, 2019
[Effect of esmolol on cardiovascular responses induced by scopolamine butylbromide]
Satomi Suzuki1, Akihiko Nonaka, Fumiaki Abe
1Department of Anesthesia, Yamanashi Prefectural Central Hospital, Yamanashi 400-8506.
Insights
Scopolamine butylbromide (HB) can increase heart rate. Esmolol effectively controlled this side effect during major abdominal surgery, preventing significant heart rate changes in patients receiving HB. This combination aids hemodynamic stability.
Area of Science:
- Anesthesiology
- Pharmacology
Context:
- Scopolamine butylbromide (HB) is an anticholinergic smooth muscle relaxant used in surgery.
- HB administration can cause a significant increase in heart rate as a side effect.
- Hemodynamic management during major abdominal surgery requires careful monitoring.
Purpose:
- To evaluate the efficacy of esmolol in mitigating the heart rate increase induced by scopolamine butylbromide (HB).
- To assess the impact of esmolol on hemodynamic changes during major abdominal surgery under inhalation anesthesia.
Summary:
- A randomized study compared esmolol (n=8) with a control group (n=9) receiving HB during major abdominal surgery.
- While the control group showed a significant heart rate increase post-HB, the esmolol group maintained stable heart rates.
- Neither group experienced significant changes in blood pressure.
Impact:
- Simultaneous administration of esmolol and HB is effective for controlling heart rate elevations.
- This combination can improve hemodynamic stability in patients undergoing major abdominal surgery.
- Esmolol serves as a valuable adjunct for managing HB-induced tachycardia.
Background:
Scopolamine butylbromide (hyoscine-N-butylbromide, HB) is an anticholinergic drug used as a smooth muscle relaxant, and is used even in some surgical procedures during general anesthesia. HB also causes an increase in heart rate as a side effect. The authors evaluated the efficacy of esmolol on hemodynamic changes induced by HB in major abdominal surgery under inhalation anesthesia.
Methods:
Seventeen patients for major abdominal surgery were randomly assigned to control group (C group, n = 9) or to esmolol group (E group, n = 8). Anesthesia was induced with propofol and was maintained with isoflurane-nitrous oxide inhalation and intermittent administration of fentanyl and vecuronium. At the time of bowel anastomosis, 20 mg of HB was administrated as an antispasmodic. In E group, esmolol 0.6 mg x kg(-1) was administered immediately after HB administration.
Results:
There were no differences in the patient background between the two groups. At 1 to 10 minutes after HB administration, heart rate increased significantly compared with that at pre-administration in C group, while there was no significant change in heart rate in E group. Heart rate in E group was significantly lower than that in C group at 2 and 3 minutes after HB administration. Blood pressure was not significantly changed in both groups during the observation period.
Conclusions:
The simultaneous administration of HB and esmolol was useful for heart rate control after HB administration.
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