Answers:
What percentage of transverse temporal bone fractures cause a facial nerve injury?
A) 10%
B) 25%
C) 50%
D) 75%
E) 90%
Facial nerve injury is present in 50% of transverse tbone fractures. Facial nerve injury is present in only 20% of longitudinal t bone fractures. It is always import to delineate whether facial nerve injuries are immediate or delayed as immediate are almost always operative, wheres delayed is usually not.
What test can be done to determine whether clear fluid draining from the ear is CSF or simply rhinorrhea from rhinitis?
MC Questions:
What percentage of traumatic TM perforations heal within 30 days?
A) 20%
B) 50%
C) 70%
D) 90%
E) 100%
A) 10%
B) 25%
C) 50%
D) 75%
E) 90%
Facial nerve injury is present in 50% of transverse tbone fractures. Facial nerve injury is present in only 20% of longitudinal t bone fractures. It is always import to delineate whether facial nerve injuries are immediate or delayed as immediate are almost always operative, wheres delayed is usually not.
What test can be done to determine whether clear fluid draining from the ear is CSF or simply rhinorrhea from rhinitis?
B2 Transferrin is the test of choice to confirm the presence of CSF. B2 transferring is a protein found exclusively in CSF.
What percentage of traumatic TM perforations heal within 30 days?
A) 20%
B) 50%
C) 70%
D) 90%
E) 100%
Free Response Question:
After what length of time dose persistence of a posttraumatic CSF leak significantly raise the chance of developing meningitis?
Quick Facts:
-CPA = potential CSF filled space in posterior cranial fossa bounded be temporal
bone, cerebellum and brainstem.-triangle
shaped,-Superior
boundary = tentorium-inferior
boundary = cerebellar tonsil / medullary olives-anterior
border = posterior dural surface of petrous bone and clivus-posterior
border = ventral surface of pons/cerebellum-medial
border = cisterns of pons and medulla-apex
= region of the lateral recess of the fourth ventricle.-The
lateral opening of the fourth ventricle (foramen of luschka) opens into
CPA.-CN
V-XI traverse cephalic and caudal extent of CPA.-Transition
to peripheral myelin (made by schwann cells) occurs at the medial opening of the
IAC.
After what length of time dose persistence of a posttraumatic CSF leak significantly raise the chance of developing meningitis?
Quick Facts:
-CPA = potential CSF filled space in posterior cranial fossa bounded be temporal
bone, cerebellum and brainstem.-triangle
shaped,-Superior
boundary = tentorium-inferior
boundary = cerebellar tonsil / medullary olives-anterior
border = posterior dural surface of petrous bone and clivus-posterior
border = ventral surface of pons/cerebellum-medial
border = cisterns of pons and medulla-apex
= region of the lateral recess of the fourth ventricle.-The
lateral opening of the fourth ventricle (foramen of luschka) opens into
CPA.-CN
V-XI traverse cephalic and caudal extent of CPA.-Transition
to peripheral myelin (made by schwann cells) occurs at the medial opening of the
IAC.
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