Tsui Test as a Predictor of Bupivacaine Consumption in Labour Epidurals
|ClinicalTrials.gov Identifier: NCT00792311|
Recruitment Status : Completed
First Posted : November 17, 2008
Last Update Posted : March 26, 2010
|Condition or disease||Intervention/treatment|
|Pain||Procedure: Tsui test|
Despite its very high success rate, the epidural technique remains a rather blind technique, and failures continue to occur. The incidence and reasons for failure are not well understood. The Tsui test is not routinely performed with each epidural catheter insertion, but rather it is used when there is suspicion about the catheter location.
In this study, the Tsui test will be performed twice during the epidural procedure, and bupivacaine consumption will be recorded for the first 2 hours.
Information gained from this study could have great impact in clinical practice, since the incidence of inadequate labor analgesia is still relatively high (10-20%), leading to maternal distress and disappointing labor experience.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||102 participants|
|Intervention Model:||Single Group Assignment|
|Masking:||None (Open Label)|
|Official Title:||Tsui Test as a Predictor of Bupivacaine Consumption in Labour Epidurals|
|Study Start Date :||November 2008|
|Primary Completion Date :||August 2009|
|Study Completion Date :||August 2009|
Experimental: Tsui test
Tsui test administration.
Procedure: Tsui test
The stimulator is set at frequency of 1Hz with 200ms pulse width and the current output ranging from 0 to 20 mA. The current output will be carefully increased from zero until motor activity is detected up to a maximum of 20 mA.
- Consumption of bupivacaine in mg/hour in the first 2 hours of epidural anesthesia [ Time Frame: 2 hours ]
- Incidence of inadequate epidural block. [ Time Frame: 2 hours ]
- Current (mA) needed to elicit motor response; 1. before test dose and 2. 5 minutes after test dose. [ Time Frame: 5 minutes ]
- Contraction pattern elicited by the Tsui test at baseline and after test dose. [ Time Frame: 5 minutes ]
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00792311
|Mount Sinai Hospital|
|Toronto, Ontario, Canada, M5G 1X5|
|Principal Investigator:||Jose CA Carvalho, MD||Mount Sinai Hospital, New York|