Final answer:
The popliteal nerve block is administered at the popliteal fossa, a shallow depression at the back of the knee, often using anatomical landmarks or ultrasound for guidance to target the tibial and common peroneal nerves.
Step-by-step explanation:
The injection site for the popliteal nerve block is located at the back of the knee. It is performed to provide anesthesia or analgesia for surgeries on the lower leg, foot, and ankle by blocking the tibial and common peroneal nerves, which are branches of the sciatic nerve.
For this procedure, the patient is typically placed prone, and the injection is made in the popliteal fossa, which is the shallow depression located at the back of the knee joint. Anatomical landmarks or ultrasound guidance are used to locate the proper injection site and ensure accuracy for the nerve block.