Low-dose Spinal Bupivacaine for Anorectal Surgery in Nakhonpathom Hospital

Abstract

     Objective : The purpose of this study was, to determine effect of spinal low-dose isobaric bupivacaine for anorectal surgery.

     Methods : This descriptive study consist of 40 patients undergoing spinal anesthesia with 0.5% isobaric bupivacaine 5 mg. for anorectal surgery. We recorded data of level of anesthesia, mean arterial blood pressure, heart rate, urinary retention, nausea, vomiting and shivering.

     Result : At 5 minutes all patients had level of anesthesia between S4 and T12 and at 60 minutes 12   patients had completely recovery from spinal anesthesia. None of the patients had level of anesthesia above   T10. The average of MAP decreased significantly at 5, 15, 15, 30, 45 and 60 minutes from baseline, but  not more than 20%. One patient had urinary retention, two had vomiting at recovery room and one had shivering. 

     Conclusion : The use of 5 mg. spinal isobaric bupivacaine can be sufficient, early recovery, low severity of hypotension and few other side effects for anorectal surgery