Which nerve is spared in interscalene block?

ulnar
The interscalene block covers most of the brachial plexus, sparing the ulnar (C8-T1) nerve. It is a great block for distal clavicle, shoulder, and proximal humerus procedures.

What nerves does a QL block cover?

QL blocks result in a wider sensory blockade compared to TAP block when performed using a similar volume of local anesthetic (T6-L1 for QL block vs. T10-T12 for the TAP block). Presumably, QL block also can involve the lateral cutaneous branches of the thoracoabdominal nerves (T6 to L1).

At what vertebrae is an interscalene block most often performed?

Interscalene nerve block refers to the placement of local anesthetic around the roots or trunks of the brachial plexus at the level of the C6 vertebral body between the anterior and middle scalene muscles. The procedure was first well described and popularized by Alon Winnie in 1970.

What is a Quadratus Lumborum block used for?

Quadratus lumborum block provides postoperative analgesia in a large number of surgical interventions and the list of indications is long. The efficacy of QLB for postoperative analgesia following both cesarean section (8, 14, 30, 34, 35, 42–44) and gynecological laparoscopic procedures (25, 36) was shown.

Why is the ulnar nerve spared in Interscalene blocks?

The inter- scalene block is not ap- propriate for surgery of the hand and forearm, spe- cifically in the ulnar distribu- tion of C8, T1. Because it is performed at the upper roots of the plexus, the block typi- cally spares the ulnar aspect of the hand.

What nerve Innervates the quadratus lumborum?

Innervation of the QL is via the twelfth thoracic nerve and the spinal rami of the lumbar spinal nerves. Along with the multifidus and erector spinae muscles, the QL helps to create an antagonist force to the muscles of the anterolateral abdomen wall.

What is the antagonist muscle to the quadratus lumborum?

Thus, a tight QL may be another hidden cause of low back pain (Janda 1987). When the hip adductors are tight or hypertonic, their antagonist (gluteus medius) may experience reciprocal inhibition. The gluteus medius will become weak and inhibited. This in turn may cause hypertonicity of ipsilateral QL.

How long does an interscalene block last for?

The block can last anywhere from 4 to 18 hours, depending on which medicines are used. As with any anesthetic, there are risks and benefits to interscalene blocks. These particulars can be discussed with your anesthesiologist before your surgery.

How do you block a Musculocutaneous nerve?

However, the musculocutaneous nerve is readily visualized and reliably anesthetized by a separate injection using ultrasound guidance. When required, the medial skin of the upper arm (intercostobrachial nerve, T2) can be blocked by an additional subcutaneous injection just distal to the axilla.