Functional Endoscopic Sinus Surgery (FESS) is highly effective for chronic sinusitis and nasal polyposis, but operates within millimeters of critical boundaries: the skull base (cribriform plate and fovea ethmoidalis) and the eye socket (lamina papyracea). Entering these boundaries can cause cerebrospinal fluid (CSF) leaks, meningitis, brain tissue injury, orbital hematoma, direct optic nerve severing (blindness), or major carotid artery lacerations.
Clinical negligence audits are grounded in standard clinical references and guidelines. For this condition, our auditors evaluate care compliance against the following bodies:
Substandard care is identified when the surgeon breaches the lamina papyracea or fovea ethmoidalis due to poor anatomical orientation, failing to map variations on pre-operative CT scans. Further breaches include using high-powered microdebriders blindly inside narrow recess structures or failing to recognize and patch a CSF leak before concluding the procedure, leaving the patient exposed to intracranial infections.
Causation audits evaluate if the orbital or intracranial trauma resulted in permanent deficits that could have been avoided with early recognition. For example, if a lamina papyracea breach caused an orbital hematoma, failing to perform an immediate emergency lateral canthotomy to relieve intraocular pressure directly leads to permanent blindness. In CSF leak claims, delayed repair resulting in ascending bacterial meningitis or brain abscess forms the primary causation link.
Not necessarily. Highly distorted sinus anatomy due to prior disease or revision surgery increases risk. However, entering the brain cavity because the surgeon failed to check pre-operative CT imaging or failed to recognize anatomical landmarks constitutes a clear breach of standard surgical care.
The Keros Classification measures the depth of the olfactory groove where the skull base is thinnest. A Keros Type III skull base is deep and extremely vulnerable to surgical instrumentation. Failure of a surgeon to document and carefully adapt their technique to a high-risk Keros anatomy on a patient's CT scan is a common focal point in surgical negligence audits.
Consultant ENT, Head & Neck & Thyroid Surgeon
Lead for Clinical Governance in ENT. Mr. Hariri is available for premium instruction by legal panels, claimant solicitors, and defense networks.