RN A medical surgery exam due aug 2024
seps are useful in post-traumatic head injury and coma for determination of
prognosis. which of the following results would correlate with the best prognisis -
ANSWER-presence of cotical potentials
peripheral neuropathy - ANSWER-diabetes mellitus
disease of the nerve roots - ANSWER-radiculopathy
stroke with greater involvement of the leg than the arm may be related to the
occlusion in which artery - ANSWER-anterior cerbral
the asymmetry of the erb's point responses is most likely due to - ANSWER-
electrode placement
the generator of the p14 is thought to be - ANSWER-the medial lemniscus in the
brainstem
which will the 60 Hz notch filter distort the least? - ANSWER-SSEP
when recording SSEPs the phase shift caused by high and low frequency filters
affect? - ANSWER-latency only
for good recordings you must have - ANSWER-high input impedece, low electrode
impedence
, the opposition to alternating current flow is know as - ANSWER-impedance
during a scoliosis surgery, you recognize a gradual latency increase of 2.5 msec
and amplitudes drop of more than 45% in the PTN cortical response, the
subcortical response appears to be shifted out almost as much. all other
responses amplitudes and latency are unchanged. what is the appropriate action
to take? - ANSWER-inform the surgeon immediately that chages consistent with
spinal cord injury may have occured. recommend a wake up test
during the exposure of an anterior cervical surgery, a sudden loss of the left UN
cortical response occurs. the subcortical response recorded from c5s-fpz however,
is unchanged. PTN repsonses are unchanged. what should you do? - ANSWER-
check you C4 electrode. it may have fallen out
what can increase sep amp? - ANSWER-etomidate/ketamine
when testing ssep from the upper extremity, an electrode placed at Erb's pint will
record activity generated from - ANSWER-brachial plexus
which montage would you use to confirm a change in the Cz-Fz cortical response
to PTN stimulus? - ANSWER-pop fossa
monitoring ssep function may fail to recognize change in - ANSWER-anterior spinal
cord function
nerve fibers activated during sep recording carry what type of information -
ANSWER-proprioception and vibrotactile sensation
seps are useful in post-traumatic head injury and coma for determination of
prognosis. which of the following results would correlate with the best prognisis -
ANSWER-presence of cotical potentials
peripheral neuropathy - ANSWER-diabetes mellitus
disease of the nerve roots - ANSWER-radiculopathy
stroke with greater involvement of the leg than the arm may be related to the
occlusion in which artery - ANSWER-anterior cerbral
the asymmetry of the erb's point responses is most likely due to - ANSWER-
electrode placement
the generator of the p14 is thought to be - ANSWER-the medial lemniscus in the
brainstem
which will the 60 Hz notch filter distort the least? - ANSWER-SSEP
when recording SSEPs the phase shift caused by high and low frequency filters
affect? - ANSWER-latency only
for good recordings you must have - ANSWER-high input impedece, low electrode
impedence
, the opposition to alternating current flow is know as - ANSWER-impedance
during a scoliosis surgery, you recognize a gradual latency increase of 2.5 msec
and amplitudes drop of more than 45% in the PTN cortical response, the
subcortical response appears to be shifted out almost as much. all other
responses amplitudes and latency are unchanged. what is the appropriate action
to take? - ANSWER-inform the surgeon immediately that chages consistent with
spinal cord injury may have occured. recommend a wake up test
during the exposure of an anterior cervical surgery, a sudden loss of the left UN
cortical response occurs. the subcortical response recorded from c5s-fpz however,
is unchanged. PTN repsonses are unchanged. what should you do? - ANSWER-
check you C4 electrode. it may have fallen out
what can increase sep amp? - ANSWER-etomidate/ketamine
when testing ssep from the upper extremity, an electrode placed at Erb's pint will
record activity generated from - ANSWER-brachial plexus
which montage would you use to confirm a change in the Cz-Fz cortical response
to PTN stimulus? - ANSWER-pop fossa
monitoring ssep function may fail to recognize change in - ANSWER-anterior spinal
cord function
nerve fibers activated during sep recording carry what type of information -
ANSWER-proprioception and vibrotactile sensation
