Anesthesia
Conditions
Keywords
Ultrasonography, Block nerve, Anaesthesia, Carpal tunnel syndrome
Brief summary
1. Evaluation of the efficacy of the circumferential versus non circumferential distribution of mepivacaine around the median and ulnar nerves. 2. Evaluation the onset of action of mepivacaine in circumferential versus non circumferential distribution around the median and ulnar nerves. 3. Spread of mepivacaine after injection guided by ultrasonography. 4. Complications of both anesthetic techniques in postoperative time.
Interventions
PROCEDURECircumferential spread of the mepivacaine ultrasonographic guided around the median and ulnar nerves at the elbow
Homogeneous spread of 6 ml of mepivacaine 1% around the median and ulnar nerves in each one using several needle passes and active hydrodissection
PROCEDURENon circumferential spread in ultrasound-guided median and ulnar nerves block
Asymmetric spread of 6 ml of mepivacaine 1% in contact with median and ulnar nerves block in each one, using only one needle pass
Sponsors
Complexo Hospitalario Universitario de A Coruña
Study design
Allocation
RANDOMIZED
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Scheduled patients for surgery of carpal tunnel including patients in ASA I-III status, without
Exclusion criteria
. The principal investigator study and/or other designated site staff will obtain written informed consent from all research patients.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Efficacy and onset of action | On arrival in the recovery room | Sensory block will be assessed as a loss of cold sensation elicited by a cold wet cotton swab in the areas of the medial and ulnar nerves by comparison with contralateral hand. Sensory block will be clasiffied as follows: 0, anesthesia; 1, hyposthesia; 2, normal sensation. Motor function will be tested as according to a modified Bromage score: 0, no motor blokade; 1, weak response against resistence; 2, complete motor blockade. Motor and sensory blockades will be assessed by a blinded observer at 5, 15, 30 mins after local anesthetic injection and on arrival in the recovery room. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Complications in postoperative time | 24 hours postoperative time | Since the nerve block to the hospital outcome will be registered potencial block-related complications. At the first postoperative day, each patient will be called by phone, to report the time at first onset of pain in the operative site and lack of residual postoperative neurologic symptoms, postoperative nausea and vomiting, and hospital readmission (for severity of pain or bleeding or other reasons) |
Countries
Spain
Outcome results
None listed