CNIM Practice Exam 2 Questions And Answers
Verified 100% Correct Answers
The most critical event to monitor during CD instrumentation for
scoliosis is:
Hook placement
Graft placement
Derotation
Placement of crosslinks - ANSWER -Derotation
When is the latest acceptable time during a surgery to begin
monitoring?
After electrocautery ceases
During surgical manipulation of neural structure
Before any surgical manipulations which place neural structures at
risk
Before closure of the wound - ANSWER -Before any surgical
manipulations which place neural structures at risk
In a normal adult, stimulation of the median nerve at the wrist will:
elicit a primary cortical response at about 20 msec elicit
an Erb's point response at about 15 msec produce a
visible twitch in the abductor hallucis muscle elicit a
,cervical response at approximately 18 msec - ANSWER
-elicit a primary cortical response at about 20 msec
The resting membrane potential of a neuron is
+ 20 mV
+ 70 mV
- 20 mV
- 70 mV - ANSWER -- 70 mV
Meniere's Disease
Medial geniculate
Inner ear
Brainstem
Thalamus - ANSWER -Inner ear
X - Eliciting a motor twitch with PTN stimulation, you expect to see:
Plantar flexion of the toes with eversion of the foot
Dorsiflexion of the toes
,Plantar flexion of the toes
Flexion of the abductor pollicis brevis - ANSWER -Plantar flexion of
the toes
At the end of an acoustic neuroma surgery, you would test the facial
nerve by stimulating:
At the site of the tumor
Distal to the site of the tumor
Proximal to the site of the tumor
At the stylomastoid foramen - ANSWER -Proximal to the site of the
tumor
A secure method for applying surface cup electrodes requires:
application the day before surgery
a conductive paste and tape water
resistant tape
collodion and compressed air - ANSWER -collodion and compressed
air
What would be an acceptable criterion for significant change in MN
SSEP?
, 50% change in latency, 10% change in amplitude
50% change in latency, 50% change in amplitude
10% change in latency, 10% change in amplitude
10% change in latency, 50% change in amplitude - ANSWER -10%
change in latency, 50% change in amplitude
Common sources of non-physiologic artifact in the operating room
include
oxygenation, ventilation, and body temperature operating
microscopes, C-arm, and heating devices movement in the room,
VCR monitors, and surgical instruments the surgeon,
anesthesiologist, and neurophysiologist - ANSWER operating
microscopes, C-arm, and heating devices
Vertical resolution depends on:
Input impedance
Number of bits
Stimulation rate
Low cut filter - ANSWER -Number of bits
The proper monitoring modalities for a C5-C6 cervical fracture
surgery would be:
Verified 100% Correct Answers
The most critical event to monitor during CD instrumentation for
scoliosis is:
Hook placement
Graft placement
Derotation
Placement of crosslinks - ANSWER -Derotation
When is the latest acceptable time during a surgery to begin
monitoring?
After electrocautery ceases
During surgical manipulation of neural structure
Before any surgical manipulations which place neural structures at
risk
Before closure of the wound - ANSWER -Before any surgical
manipulations which place neural structures at risk
In a normal adult, stimulation of the median nerve at the wrist will:
elicit a primary cortical response at about 20 msec elicit
an Erb's point response at about 15 msec produce a
visible twitch in the abductor hallucis muscle elicit a
,cervical response at approximately 18 msec - ANSWER
-elicit a primary cortical response at about 20 msec
The resting membrane potential of a neuron is
+ 20 mV
+ 70 mV
- 20 mV
- 70 mV - ANSWER -- 70 mV
Meniere's Disease
Medial geniculate
Inner ear
Brainstem
Thalamus - ANSWER -Inner ear
X - Eliciting a motor twitch with PTN stimulation, you expect to see:
Plantar flexion of the toes with eversion of the foot
Dorsiflexion of the toes
,Plantar flexion of the toes
Flexion of the abductor pollicis brevis - ANSWER -Plantar flexion of
the toes
At the end of an acoustic neuroma surgery, you would test the facial
nerve by stimulating:
At the site of the tumor
Distal to the site of the tumor
Proximal to the site of the tumor
At the stylomastoid foramen - ANSWER -Proximal to the site of the
tumor
A secure method for applying surface cup electrodes requires:
application the day before surgery
a conductive paste and tape water
resistant tape
collodion and compressed air - ANSWER -collodion and compressed
air
What would be an acceptable criterion for significant change in MN
SSEP?
, 50% change in latency, 10% change in amplitude
50% change in latency, 50% change in amplitude
10% change in latency, 10% change in amplitude
10% change in latency, 50% change in amplitude - ANSWER -10%
change in latency, 50% change in amplitude
Common sources of non-physiologic artifact in the operating room
include
oxygenation, ventilation, and body temperature operating
microscopes, C-arm, and heating devices movement in the room,
VCR monitors, and surgical instruments the surgeon,
anesthesiologist, and neurophysiologist - ANSWER operating
microscopes, C-arm, and heating devices
Vertical resolution depends on:
Input impedance
Number of bits
Stimulation rate
Low cut filter - ANSWER -Number of bits
The proper monitoring modalities for a C5-C6 cervical fracture
surgery would be:
