Ultrasound-guided nerve block is a method of injecting anesthetic drugs into the nerve sheath close to the nerves to help reduce pain during surgery and reduce pain after surgery.

Femoral nerve catheter placement for pain relief after lower limb surgery is a new technique, with many advantages when not using Morphine and morphine precursors, helping to reduce the side effects of morphine such as: nausea, vomiting, urinary retention, constipation, and even addiction.