How much volume of a local anesthetic is necessary to accomplish a nervus saphenous block
Completed
- Conditions
- Saphenous nerve blockNot Applicable
- Registration Number
- ISRCTN15319297
- Lead Sponsor
- Academisch Medisch Centrum (Academic Medical Center)
- Brief Summary
Not available
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Completed
- Sex
- All
- Target Recruitment
- 25
Inclusion Criteria
1. Aged between 18 and 65 years
2. ASA physical status I-II (healthy)
Exclusion Criteria
1. Allergy against local anesthetics
2. Contraindication for saphenous nerve block (infection at injection site, local pathology)
3. Ingestion of any pain medication within the past 24 hours
4. Pregnancy or breastfeeding
Study & Design
- Study Type
- Interventional
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method Effective volume to produce complete neural blockade is determined using a pinprick in the sensory area of the saphenous nerve to provoke a dichotomous yes/no answer, 30 minutes after block.
- Secondary Outcome Measures
Name Time Method 1. Influence of the volume on duration of sensory blockade is measured using pinpricks at the apex of the patella, medial aspect of the medial facet of the tibial plateau and the skin over the medial ankle at 2, 4, 6, 8, 10, 15, 20, 25, and 30 minutes, and then every 15 minutes until block resolution<br>2. Extent of potential motor blockade is measured using the MRC-scale 20 minutes after block onset<br>3. The maximum spread of sensory block on the skin surface is measured using pinpricks to establish the edge of the anaesthetised area 20 minutes after block onset