Preventing Entry-Related Gynaecological Laparoscopic Injuries
Background and Scope
Around 250,000 women undergo laparoscopic surgery in the UK annually. Most have no problems, but serious complications occur in roughly 1/1000 cases. Injuries occur characteristically during the blind insertion of the Veress needle, primary trocar, and cannula — the period of greatest risk runs from skin incision until visualisation within the peritoneal cavity is confirmed. Bowel injury is particularly dangerous because it may not be recognised at the time and can present late, sometimes after discharge, requiring major reparative surgery and occasionally a temporary colostomy; early diagnosis by senior staff is essential once suspected.
Risk Factors
- Previous laparotomy/abdominal surgery — adhesions form at the umbilicus in up to ~50% after midline laparotomy and ~23% after a low transverse incision, increasing bowel-adherence risk at primary entry.
- Obesity — increases technical difficulty and risk at conventional umbilical entry.
- Very thin, young, nulliparous women with well-developed abdominal musculature (and especially those with severe anorexia) — at highest risk of major vessel injury, as the aorta may lie less than 2.5 cm below the skin.
- Peritonitis or inflammatory bowel disease.
- These factors should be explicitly discussed during consent, alongside the general risks of bowel, urinary tract, and major vessel injury, and later port-site hernia (Good Practice Point).
Entry Technique — Veress Needle (Closed) vs Open (Hasson)
- Both closed (Veress needle) and open (Hasson) entry are acceptable; a meta-analysis of RCTs shows no significant safety advantage of one technique over the other (Grade A, evidence level Ia) for major complications, though observational data are mixed — one large closed-entry meta-analysis reported bowel injury 0.4/1000 and major vessel injury 0.2/1000, while the Australian ASERNIP-S review found a higher relative risk of bowel injury with open entry (RR 2.17).
- Direct trocar insertion (without prior pneumoperitoneum) is an acceptable alternative (Grade A) — meta-analysis shows no safety disadvantage for major complications and possibly fewer minor complications.
- Primary umbilical incision should be vertical, at the base of the umbilicus, not below it.
- Insufflate to 20–25 mmHg before inserting the primary trocar (Grade B) — this "splinting" increases the distance between skin and viscera; reduce to 12–15 mmHg once trocars are in for safe ventilation.
- After entry, rotate the laparoscope through 360° to inspect for adherent bowel, haemorrhage, or retroperitoneal haematoma.
Special Populations and Alternative Sites
- Obese women: open (Hasson) technique or Palmer's point entry is recommended for primary entry (Grade C); if Veress is used, the incision must be made deep in the base of the umbilicus with vertical insertion.
- Very thin women: Hasson technique or Palmer's point entry is recommended (Grade C), given the elevated risk of major vessel injury.
- Palmer's point (3 cm below the left costal margin, mid-clavicular line) is the preferred alternative site, except with prior surgery in that area or splenomegaly (Grade B).
- Suprapubic, transfundal, and posterior fornix entry sites are generally to be avoided due to bladder injury risk, infection risk, and risk of rectal perforation in undiagnosed deep infiltrating endometriosis, respectively.
- Secondary ports must be inserted under direct vision, perpendicular to the skin, with the inferior epigastric vessels identified and avoided; ports >7 mm (lateral) or >10 mm (midline) require formal sheath closure to prevent port-site hernia.
High-Yield Exam Points
- No RCT evidence favours open (Hasson) over closed (Veress) entry, or vice versa, for major complications — both are acceptable (Grade A for direct trocar insertion too).
- Insufflate to 20–25 mmHg before primary trocar insertion, then reduce to 12–15 mmHg once entry is complete.
- Palmer's point (3 cm below left costal margin, mid-clavicular line) is the preferred alternative entry site — avoid if prior surgery there or splenomegaly.
- Obese women: Hasson or Palmer's point preferred; if Veress used, insert vertically at the deepest part of the umbilical base.
- Thin, young, nulliparous women carry the highest risk of major vessel injury (aorta may be <2.5 cm from skin) — use Hasson or Palmer's point.
- Bowel injury may present late after discharge — high suspicion and senior review are essential for delayed symptoms post-laparoscopy.
- Ports >7 mm non-midline or >10 mm midline need formal deep sheath closure to prevent port-site hernia.
Source: RCOG Green-top Guideline No. 49 (May 2008 (first edition). A joint second edition with the British Society for Gynaecological Endoscopy (BSGE) was announced as "in development" on the RCOG guidance page, but no published second edition has been identified — treat this as the current guideline and verify against the RCOG/BSGE sites before relying on it for a live exam sitting.)
Read the original on rcog.org.uk
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