Continuous Blockade of the Brachial Plexus

This is a prospective randomized double-blinded study that will compare two commonly used
approaches for the continuous blockade of the brachial plexus: the CCPVB, which focusses on
the six cervical nerve root (C6 root), and CISB, which focuses on the upper trunk of the
brachial plexus. Data of sensory testing, motor strength, shoulder pain, phrenic nerve
function, recurrent laryngeal nerve (RNL) function, ipsilateral Horner's syndrome, block time
and medication doses used for block placement, will be collected. All observations and
measurements will be made by a member of the research team who is unaware of patient
allocation to any particular group.

Inclusion Criteria:

- The general inclusion will be those adult patients who:

- are between the ages of 18 and 80 years

- have an ASA Health Classification of I, II, or III

- are scheduled for shoulder arthroplasty or rotator cuff repair surgery

- Patients with a BMI of =to/< 40 Exclusion

The Exclusion criteria will include:

- Patient refusal to participate in the study or sign informed consent

- Patients with contraindications to any of the two blocks or allergy to any of the
drugs used

- Patients with shoulder surgery that developed into any other surgery other than total
shoulder arthroplasty or rotator cuff repair

- Patients with a BMI >40