Korean J Anesthesiol Search

CLOSE


Korean Journal of Anesthesiology 2007;52(6):681-686.
DOI: https://doi.org/10.4097/kjae.2007.52.6.681   
Neuromuscular Blocking Actions of Hexamethonium, Rocuronium and (-)Vesamicol.
Mi Jin Kim, Soo Il Lee, Jong Hwan Lee, Seung Cheol Lee
Department of Anesthesiology and Pain Medicine, Dong-A University Medical Center, College of Medicine, Dong-A University, Busan, Korea. silee@dau.ac.kr
Abstract
BACKGROUND
Hexamethonium (HM) and Rocuronium (R) are nAChR antagonists. However, there is some controversy as to whether R has a selective presynaptic effect. (-)Vesamicol (V) inhibits the transport of acetylcholine into the vesicles. This study compared the neuromuscular blockade of HM, R and V. METHODS: Hemidiaphragm-phrenic nerve preparations (male Sprague-Dawley rats [150-250 g]) were bathed in a Krebs solution maintained at 32oC and aerated with a mixture of 95% O2 and 5% CO2. Isometric forces were generated in response to 0.1 Hz, and 1.9-second 50 Hz with supramaximal stimulation (0.2 ms, rectangular) of the phrenic nerve. HM, R and V were added sequentially to achieve an 80-90% decrease in the ST. The ECs for ST, PTT and TF were calculated using a probit model. The antagonism indices of calcium (5 mM) and neostigmine (N) (250 nM) were assessed at the 85+/-5% level. RESULTS: The potency of ST, PTT and TF were respectively, 5.92, 3.56 and 1.99 mM for HM, 10.81, 5.27 and 4.4 1micronM for R, and 19.4, 15.2 and 13.3micronM for V. The neuromuscular blockades of R were reversed by N but not by calcium. Those of V were not reversed by either of them. Calcium and N inhibited the decrease in ST and TF by HM, respectively. CONCLUSIONS: The mechanism for how HM and R affect the neuromuscular blockade are different. V might not affect the release of acetylcholine.
Key Words: calcium; hemidiaphragm; hexamethonium; neostigmine; rocuronium; (-)vesamicol


ABOUT
ARTICLE CATEGORY

Browse all articles >

BROWSE ARTICLES
AUTHOR INFORMATION
Editorial Office
101-3503, Lotte Castle President, 109 Mapo-daero, Mapo-gu, Seoul 04146, Korea
(서울특별시 마포구 마포대로 109 롯데캐슬 프레지던트 101동 3503호)
Tel: +82-2-792-5128    Fax: +82-2-792-4089    E-mail: journal@anesthesia.or.kr                
Business Name: Korean Society of Anesthesiologists (대한마취통증의학회)
Business Registration: 106-82-07194
Representative: Jun Heum Yon (연준흠)

Copyright © 2024 by Korean Society of Anesthesiologists.

Developed in M2PI

Close layer
prev next