CPT® Code 31051

The procedure described by CPT® Code 31051 refers to a sinusotomy of the sphenoid sinus, which is a surgical intervention performed to access the sphenoid sinus located at the center of the skull base. This sinus is the most posterior of the paranasal sinuses and can be approached through various surgical techniques. The common language description outlines three primary approaches for evaluating lesions or masses within the sphenoid sinus: the transpalatal approach, the transnasal transseptal approach, and the external transorbital transethmoidal approach. Each of these methods involves specific incisions and manipulations to gain access to the sinus. In the transpalatal approach, an incision is made in the palate, allowing for the elevation of a palatal flap, which exposes the nasopharynx and the floor of the sphenoid sinus. This is followed by the removal of portions of the hard palate and vomer using a drill or rongeur to open the sphenoid sinus. The transnasal transseptal approach involves accessing the sphenoid sinus through the nostril, with potential augmentation through a sublabial incision. This method requires severing attachments to the anterior sphenoid wall to enter the sinus using fine rongeurs or a sphenoid punch. The external transorbital transethmoidal approach necessitates an external incision through the orbit and an ethmoidectomy to facilitate access to the sphenoid sinus. The procedure may include mucosal stripping or the removal of polyps, with or without obtaining a biopsy. Mucosal stripping involves the elevation and removal of the sinus mucosa, while polypectomy entails grasping and completely removing any polyps present within the sinus. This surgical intervention is critical for addressing various conditions affecting the sphenoid sinus, ensuring that any obstructive or pathological tissues are effectively managed.