Clinical Risk Mitigation With The Veress Needle

https://en.wikipedia.org/wiki/Veress_needle

Despite sophisticated safety designs, the Veress needle-being a blind-access instrument-carries inherent clinical risks. For surgeons, understanding these risks and mastering mitigation strategies is paramount. Major complications include major vascular injury, bowel perforation, subcutaneous emphysema, and rare but fatal gas embolism.

1. Major Vascular Injury:​ The most feared complication. Laceration of vessels (e.g., inferior epigastric, aorta, iliacs) can cause exsanguination. Risk factors: poor site selection (too medial), excessive depth/angle, distorted anatomy (prior surgery), and difficulty appreciating LOR in obesity.

Mitigation:Prefer Palmer's Point (left upper quadrant) to avoid epigastric vessels. Firmly elevate the abdominal wall. For high-risk patients (morbid obesity, prior surgery), strongly consider Hasson open entry or ultrasound-guided access.

2. Bowel Perforation:​ Laceration of bowel (especially adherent loops) risks peritonitis, abscess, or sepsis. Risk factors: adhesions (prior surgery), distension (bringing bowel closer to wall), and horizontal insertion angles.

Mitigation:Meticulous history taking. Employ a "two-step" technique in adhesive cases. Rigorously perform aspiration and hanging drop tests pre-insufflation. Any suggestion of bowel content mandates immediate cessation and conversion to open or endoscopic management.

3. Subcutaneous Emphysema:​ The most frequent complication. CO₂ dissects into tissue planes, causing crepitus. While usually benign, extensive cases can impair ventilation and cause hypercapnia.

Mitigation:Ensure complete intraperitoneal side-port placement before insufflation. Commence with low-flow insufflation (1–2 L/min) while monitoring IAP. If emphysema develops, pause insufflation and adjust needle position. Severe cases may require needle decompression.

4. Gas Embolism:​ Exceedingly rare but catastrophic. High-pressure CO₂ entry into veins (e.g., portal, IVC) can cause cardiovascular collapse.

Mitigation:Never insufflate under high pressure. Pre-insufflation checks must unequivocally rule out intravascular placement. If embolism is suspected (sudden hypotension, cyanosis, mill-wheel murmur), immediately cease insufflation, place the patient in the left lateral Trendelenburg position (Durant maneuver), initiate CPR, and attempt aspiration via a central venous catheter.

Case Analysis:​ A tertiary center reported a case of inferior epigastric artery injury during Veress insertion. The patient, a middle-aged male (BMI 28), was accessed infraumbilically without adequate wall elevation and with an overly vertical angle. Post-insertion, he developed hypotension and abdominal distension. Emergency CT confirmed active arterial hemorrhage, necessitating urgent laparotomy for hemostasis. The lesson: meticulous wall elevation is paramount in obesity, and entry site selection must be individualized-the umbilicus is not universally safe.

These cases underscore that Veress safety hinges on instrument design andsurgical experience, disciplined technique, and profound respect for hazards. Ongoing education, simulation training, and team coordination remain the cornerstones of risk reduction.