Regional Anesthesia, Supraclavicular Block, Ultrasound
Conditions
Brief summary
The achievement of peripheral nerve block requires several needle passes, with each of them being at risk of causing nerve injury either by direct trauma or intraneural injection even with the use of the ultrasound. The ultrasound guided supraclavicular brachial plexus block is known to be at risk of pneumothorax and / or nerve injury. This study is designed to determine the maximal effective distance away from the nerve for the injection to be effective.
Interventions
None listed
Sponsors
Tunisian Military Hospital
Study design
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to 85 Years
Healthy volunteers
No
Inclusion criteria
* ASA physical status I-III * 18-85 years of age, inclusive * surgery less than 3 hours
Exclusion criteria
* contraindications to brachial plexus block (e.g., allergy to local anesthetics, coagulopathy, malignancy or infection in the area) * existing neurological deficit in the area to be blocked * pregnancy * history of neck surgery or radiotherapy * inability to understand the informed consent and demands of the study
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Success of the ultrasound guided supraclavicular block at 30 minutes after injection at a specific distance of the needle tip from the outer sheeth of the nerve | 30 minutes |
Secondary
| Measure | Time frame |
|---|---|
| •The onset time of sensory and motor block | the block success will be assessed for each patient every 5 min for 30 mins in the operating room beginning when the needle exits the skin |
| The proportion of inadequate and failed blocks. | the block success will be assessed for each patient every 5 min for 30 mins in the operating room beginning when the needle exits the skin |
| The presence of other complications such as hematoma, infection, pneumothorax. | up to 48 hours post operative. |
Outcome results
None listed