Question

Draw a neatly labelled diagram of the brachial plexus. Enumerate the various approaches to the brachial plexus block.

Hint:

In brachial plexus block techniques, ensure proper needle placement and be aware of the anatomical variations of the brachial plexus. The correct approach depends on the area of surgery.

Answer 1

Step 1: Drawing the diagram. 
A labeled diagram of the brachial plexus should include the roots, trunks, divisions, cords, and branches. Make sure to clearly mark the key structures:
- Roots: C5, C6, C7, C8, T1:
- Trunks: Upper, Middle, Lower:
- Divisions: Anterior and Posterior for each trunk:
- Cords: Lateral, Posterior, Medial:
- Branches: Musculocutaneous, Axillary, Radial, Median, Ulnar 
 

Step 2: Approaches to the brachial plexus block. 
The brachial plexus block can be performed using various approaches: :
1. Interscalene Block: Injection between the anterior and middle scalene muscles. It is used for shoulder and upper arm surgeries.:
2. Supraclavicular Block: Injection above the clavicle, close to the brachial plexus as it passes under the clavicle.:
3. Infraclavicular Block: Injection below the clavicle, targeting the brachial plexus near the cords.:
4. Axillary Block: Injection near the axillary artery, blocking the brachial plexus at the level of the cords. This approach is commonly used for forearm and hand surgeries.: