Sinus Trocar 5mm 170mm — Frontal Sinus Trephination

Sinus Trocar — 5mm 170mm Frontal Sinus Trephination

The 5mm sinus trocar at 170mm length is the frontal-sinus-trephination variant — used for the emergency drainage of acute frontal sinusitis with impending intracranial complications. Frontal-sinus trephination through a small forehead incision provides immediate drainage when endoscopic approach is unsuccessful or unavailable. The 5mm bore handles the purulent contents that the procedure aims to evacuate.

The frontal-sinusitis-complication emergency

Acute frontal sinusitis can extend intracranially through the posterior frontal-sinus wall via emissary veins (“Pott’s puffy tumour” — the eponymous Sir Percivall Pott’s 1760 description of subperiosteal frontal-bone osteomyelitis with overlying scalp swelling). The extension produces epidural abscess, brain abscess, or cavernous-sinus thrombosis — life-threatening complications requiring rapid frontal-sinus drainage. The 5mm sinus trocar provides emergency drainage capability when endoscopic frontal-sinusotomy is delayed or unsuccessful.

The trephination workflow

Frontal-sinus trephination uses a small (10-15mm) forehead skin incision, periosteal elevation, and trocar-or-drill entry into the frontal-sinus floor. The procedure can be performed under local anaesthesia in the cooperative patient; emergency settings often use general anaesthesia for airway-protection-during-drainage.