Brachial Plexus Blockade
Conditions
Brief summary
Interscalene brachial plexus block is a commonly chosen anesthetic technique for shoulder and proximal arm surgery yet it carry several risks including phrenic nerve block. Researchers assumed that slow administration of local anesthetic would reduce incidence of phrenic nerve block
Detailed description
patients will be randomly allocated into one of 2 groups ( single shot group) and slow administration group . single shot will receive a 10 ml bolus of 0.5% bupivacaine the other group will receive 10 ml 0.5 % bupivacaine over 10 minutes (at a rate of 1ml/minute) using syringe pump An experienced operator who will be blinded to method of administration will conducted diaphragmatic excursion of ipsilateral hemidiaphragm using curved probe at baseline and at 10 minutes interval for 30 minutes Complete phrenic will be defined as 75% or more reduction in DE, while partial failure as 25%-50% reduction in DE
Interventions
DEVICEDiaphragmatic excursion evaluation
They will receive 10 ml of 0.5% bupivacaine over 10 minutes
Sponsors
Cairo University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)
Intervention model description
patients will be randomly allocated into 2 groups : single shot group and slow infusion group
Eligibility
Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No
Inclusion criteria
* ASA I or II undergoing shoulder surgery under GA
Exclusion criteria
\-
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Complete phrenic nerve block defined as > 75% reduction in diaphragmatic excursion | baseline and 30 minutes after the block | defined as \> 75% reduction in diaphragmatic excursion |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| partial phrenic block | baseline and 30 minutes after the block | 25-50% reduction in DE |
Countries
Egypt
Outcome results
None listed