AS10.1-2 | Positioning Hazards and Perioperative Hazard Prevention — Summary & Reflection

KEY TAKEAWAYS

Incorrect patient positioning causes nerve injuries (brachial plexus and ulnar nerve most common), pressure injuries (capillary occlusion at bony prominences), vascular compromise (DVT, compartment syndrome), respiratory compromise (FRC reduction in Trendelenburg and prone), and postoperative vision loss (CRAO/PION from orbital pressure or ischaemia). Each surgical position carries a characteristic hazard profile — lithotomy risks common peroneal nerve injury and calf compartment syndrome; prone position risks orbital pressure and PION; lateral decubitus risks brachial plexus stretch and dependent eye compression; Trendelenburg risks raised ICP and laryngeal oedema. Prevention requires documentation, padding of all bony prominences, arm abduction limited to ≤90°, sequential compression devices, active warming, and a team-executed position check before draping. The WHO Surgical Safety Checklist (Sign-In, Time-Out, Sign-Out) is the single most evidence-based bundle for preventing multiple perioperative hazard categories simultaneously — it has been shown to reduce major complications by 36% and mortality by 47% and is mandated in all accredited hospitals. ASA physical status (I–VI, 'E' for emergency) grades systemic disease; Mallampati (I–IV) grades oropharyngeal view — these are distinct classification systems for different clinical purposes.

REFLECT

Consider a recent case — or imagine a forthcoming one — in which you were part of an operating theatre team. Think about the moment the patient was positioned. Was there a structured check of all vulnerable pressure points? Was the WHO Surgical Safety Checklist completed fully, or were steps abbreviated under time pressure? Which hazard from today's module was least visible to you at the time — and how would you ensure it is visible next time? Write three specific changes you would advocate for in the positioning protocol of your home institution, grounded in evidence from this module.