#surgery definition
- Arteriocentesis — An invasive medical procedure consisting of the surgical puncturing of an arterial wall using a fine needle or a trocar, performed for diagnostic or therapeutic purposes. This structural clinical act is used for collecting arterial blood to analyze blood gases, directly and continuously monitoring arterial pressure, or evacuating pathological intra-arterial blood collections.
- Spontaneous pneumocephalus — Spontaneous or congenital accumulation of air or gas inside the cranial cavity (within the cerebral ventricles, subarachnoid space, or brain parenchyma), occurring without obvious external trauma or prior surgical intervention. This rare structural pathological phenomenon is usually caused by the presence of a native bony or dural fistulous defect, an anomaly within the paranasal sinuses, or the action of gas-producing microorganisms within a latent endocranial infection.