Which is the most common site of femoral artery puncture for vascular access in the femoral triangle?

Explanation

## Femoral Artery Puncture Site in the Femoral Triangle ### Anatomical Landmarks **Key Point:** The femoral artery is best accessed **below the inguinal ligament at the level of the femoral head**, where it lies medial to the femoral nerve and lateral to the femoral vein. ### Why This Site Is Preferred 1. **Palpable pulse location** — The femoral pulse is most prominent at this level, where the artery crosses over the femoral head 2. **Bony landmark** — The femoral head provides a firm backing for puncture and haemostasis 3. **Vascular anatomy** — At this level, the artery is superficial and easily accessible 4. **Reduced complications** — Distance from the inguinal ligament minimizes retroperitoneal bleeding risk ### Clinical Pearl **High-Yield:** The mnemonic for femoral triangle contents from **lateral to medial** is **NAVEL**: - **N**erve (femoral nerve) - **A**rtery (femoral artery) - **V**ein (femoral vein) - **E**mpty space - **L**ymphatics The artery lies in the middle compartment, making it the second structure encountered when puncturing from lateral to medial. ### Boundaries of Femoral Triangle | Boundary | Structure | | --- | --- | | Superior | Inguinal ligament | | Medial | Medial border of adductor longus | | Lateral | Medial border of sartorius | | Floor | Pectineus, adductor longus, iliopsoas | | Roof | Fascia lata, cribriform fascia | ### Puncture Technique **Tip:** The puncture should be made: - Below the inguinal ligament (to avoid retroperitoneal bleeding) - At the level of the femoral head (palpable landmark) - At a 45–60° angle to the skin - With the femoral pulse as the guide [cite:Standring Anatomy 42e Ch 81]