Affiliation:
1. Department of Anaesthesia, St Vincent's Hospital, Melbourne, Victoria
Abstract
Deep cervical plexus blockade blocks the second, third and fourth cervical nerve roots. The phrenic nerve arises from C3,C4,C5 and should therefore be commonly blocked with cervical plexus blockade. The aim of this study was to report the incidence of phrenic nerve block and to assess the effect of this on arterial carbon dioxide tension (PaCO2) in premedicated and sedated patients. Forty patients were studied, blood gases being taken on the day before surgery, immediately before performing the block and then every 20 minutes until the operation was completed. Fluoroscopy was used to determine ipsilateral hemidiaphragmatic dysfunction due to phrenic nerve block. The patients were then divided into two groups of analysis. Group A patients had evidence of phrenic nerve block, Group B patients had no evidence of phrenic nerve block. Fluoroscopy showed that 22 patients (55%) had evidence of phrenic nerve block (Group A), 18 patients showed no change (Group B). PaCO2 levels increased in both groups following premedication, from 41 ±5 mmHg (mean± SD) to 46±5 mmHg in Group A, and 41 ±4 mmHg to 45 ±4 mmHg in Group B; twenty minutes after cervical plexus block the PaCO2 rose to 49±6 mmHg in Group A, and 48±6 mmHg in Group B. These changes were not statistically significantly different when the two groups were compared.
Subject
Anesthesiology and Pain Medicine,Critical Care and Intensive Care Medicine
Cited by
22 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献