The following questions refer to the figure below of an axial CT of the temporal bone. 
-Which line points to the sphenoid sinus?
Definitions:
Anaesthetic
Substances used to induce anesthesia, temporarily eliminating sensation or pain in a part of the body or the whole body.
Intravenous (IV)
Pertaining to the administration of substances directly into a vein, typically for hydration or the delivery of medication.
Estimated Blood Loss
An estimate of the volume of blood a patient has lost during surgery or due to injury, used to guide treatment decisions.
PACU
Acronym for Post-Anesthesia Care Unit, a specialized care area in hospitals where patients are monitored and recover from the effects of anesthesia after surgery.
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