Popliteal Pulse Location: How to Find It Behind the Knee

The popliteal pulse is palpated in the popliteal fossa—the diamond-shaped depression behind the knee—not above the femur.

Anatomy

• Artery: Popliteal artery (continuation of femoral artery after adductor hiatus).
• Location: Deep in popliteal fossa, medial to the popliteal vein and tibial nerve.
• Boundaries of fossa:
  • Superolateral: Biceps femoris tendon.
  • Superomedial: Semimembranosus/semitendinosus tendons.
  • Inferolateral: Lateral head of gastrocnemius.
  • Inferomedial: Medial head of gastrocnemius.

Palpation Technique

1. Patient prone or supine with knee flexed ~45° (relaxes hamstrings).
2. Place fingertips of both hands in the fossa, thumbs on patella.
3. Press deeply and patiently; pulse is often faint.
4. Compare bilaterally.

Clinical Uses

• Assess peripheral arterial disease (PAD) — diminished/absent pulse suggests femoral-popliteal occlusion.
• Evaluate popliteal aneurysm (palpable pulsatile mass).
• Post-knee surgery vascular check.
• BP measurement in lower extremity (ankle-brachial index).

Common Pitfalls

• Pressing too hard occludes the deep artery.
• Knee extended → fascia tight, artery compressed.
• Confusing with femoral pulse (in groin, not behind knee).

Practice on a partner; it's a valuable clinical skill for vascular assessment.