What is the most likely cause and appropriate evaluation and management for new anterior thigh numbness after a femoral arterial puncture with Perclose (suture‑mediated closure)?

Anterior Thigh Numbness After Femoral Access with Perclose

The most likely cause is femoral nerve injury from local hematoma compression or direct needle trauma during the procedure, and you should immediately perform a focused neurovascular examination and obtain urgent vascular ultrasound to rule out expanding hematoma or pseudoaneurysm requiring intervention.

Most Likely Etiology

Anterior thigh numbness following femoral access with Perclose represents a recognized access-site–related nerve injury, which the AHA guidelines specifically identify as a critical complication requiring documentation and intervention 1. The femoral nerve runs immediately lateral to the femoral artery in the femoral triangle, making it vulnerable to:

• Compressive neuropathy from hematoma formation (most common)
• Direct needle trauma during initial arterial puncture
• Stretch injury from expanding pseudoaneurysm
• Ischemic injury from vascular compromise

While suture-mediated devices like Perclose have comparable vascular complication rates to manual compression 1, nerve injury is an under-recognized complication that can occur with any femoral access technique.

Immediate Evaluation Algorithm

Step 1: Focused Neurovascular Examination

• Sensory distribution: Map the exact area of numbness (anterior thigh = femoral nerve L2-L4 distribution; medial thigh would suggest saphenous nerve)
• Motor function: Test hip flexion (iliopsoas) and knee extension (quadriceps) strength
• Reflexes: Check patellar reflex (diminished with femoral neuropathy)
• Vascular status: Palpate distal pulses, assess capillary refill, check for limb ischemia

Step 2: Urgent Imaging

• Duplex ultrasound of the access site to identify:
  • Hematoma size and location
  • Pseudoaneurysm formation
  • Arterial stenosis or occlusion from suture placement 2, 3
  • Arteriovenous fistula

Step 3: Rule Out Limb-Threatening Complications

The AHA guidelines emphasize that access-site complications requiring intervention include vascular injury causing lower-extremity ischemia and nerve injury requiring intervention 1. You must immediately exclude:

• Acute arterial occlusion: Rare but reported with Perclose due to posterior wall capture, intimal dissection, or suture-induced stenosis 4, 2, 5, 6
• Compartment syndrome: Check compartment pressures if severe pain or motor weakness present
• Expanding retroperitoneal hematoma: Consider CT if hemodynamic instability or flank pain

Management Strategy

If Compressive Hematoma Without Vascular Compromise:

• Conservative management with close neurovascular monitoring
• Serial examinations every 4-6 hours for first 24 hours
• Most compressive femoral neuropathies improve over weeks to months with hematoma resorption
• Consider neurology consultation if no improvement after 2-3 weeks

If Arterial Stenosis/Occlusion Identified:

Multiple case reports demonstrate that Perclose sutures can cause significant arterial stenosis requiring intervention 3. The mechanism involves:

• Suture placement through the posterior arterial wall 2
• Intimal dissection from improper footplate deployment 2
• Direct luminal narrowing from suture tension

Treatment options:

• Percutaneous balloon angioplasty for stenosis 3
• Surgical exploration with suture removal if endovascular treatment fails or occlusion present 2, 5, 6
• Immediate vascular surgery consultation is mandatory

If Expanding Hematoma or Pseudoaneurysm:

• Urgent vascular surgery consultation
• Surgical evacuation may be required to decompress the femoral nerve
• Pseudoaneurysm can be treated with ultrasound-guided thrombin injection or surgical repair

Critical Pitfalls to Avoid

1. Do not dismiss isolated sensory symptoms: Pure sensory femoral neuropathy can be the only presenting sign of significant vascular complications 3

2. Do not delay imaging: The AHA guidelines specifically list access-site nerve injury requiring intervention as a major complication endpoint 1. Early identification of correctable causes (hematoma, stenosis) improves outcomes.

3. Do not assume all nerve injuries are benign: While most compressive neuropathies resolve, arterial stenosis from Perclose sutures causing claudication and nerve compression has been documented and requires intervention 3

4. Watch for delayed presentations: Arterial stenosis from closure devices can manifest days to weeks after the procedure 3, 6

Documentation Requirements

Per AHA guidelines, access-site–related neurological injury is a critical endpoint that should be systematically documented 1. Record:

• Timing of symptom onset
• Exact sensory and motor deficits
• Imaging findings
• Interventions performed
• Follow-up plan

If symptoms persist beyond 48-72 hours or any motor weakness develops, obtain neurology consultation for electrodiagnostic studies and long-term prognosis assessment.