Ch. 14: CPT: twist drill, burr holes or trephine, craniectomy, or craniotomy

cisternal or lateral cervical punctures are similar in performance to a lumbar puncture for gaining acess to the

cerebellomedullary cistern -the largest of the subarachnoid cisterns between the cerebellum and medulla oblongata

cerebellomedullary cistern aka

cisterna magna

twist drill holes for puncture are

dime-sized openings in the skill (keyhole crainotomy)

twist drill puncture aka

keyhole craniotomy

a subdural hematoma refers to a

leakage of blood between the dura and arachnoid membranes

cisternal puncture is described as the

passage of a hollow needle through the posterior atlanto-occipital membrane into the cerebellomedullary cistern (cisterna magna)

trephine

surgical instrument with a cylindrical blade used to create an opening in the skill

because the cranium is a closed or finite space, hematomas must be

trained

Hematoma

1. localized collection of blood which has usually clotted 2. creates a space, which does not normally exist, and usually results in trauma

hematomas are found in organs, spaces, or tissue, and are the result of a

break in the wall of blood vessels

to allow a hematoma to expand unchecked can result in displaced brain tissue (under pressure) resulting in

anoxia or death to those tissues and eventually death to the individual