SDS Credentialing Exam – NBRC | A+ Level
Questions with Accurate Rationales
In the 10-20 system, the sagittal, coronal planes are divided what % - ✔✔20%
From naison to Fpz is what %
From Inion to Oz is what %
From M1/M2 to T3/T4 is what % - ✔✔10%
From O1/O2 to Oz is what %
From Fp1/Fp2 to Fpz is what % - ✔✔5%
In the 10-20 system, the parasagettial planes (Fp1 to O1) and (Fp2 to O2) are divided into
what % - ✔✔25%
Fp1 - F3 - C3 - P3 - O1 (left)
Fp2 - F4 - C4 - P4 - O2 (right)
If the distance from Fp2 to O2 is 30cm, what is the distance from C4 to P4 - ✔✔7.5cm (25%
of 30cm)
For the following channels, list the :
LFF - HFF Sensitivity Sampling Rate
F4-M1
C4-M1
O2-M1
E1-M2
E2-M2 - ✔✔0.3 - 35Hz 7uv/mm 500Hz
For the following channels, list the:
,LFF - HFF Sensitivity Sampling Rate
ECG - ✔✔0.3 - 70Hz 20uv/mm 500Hz
For the following channels, list the
LFF - HFF Sensitivity Sampling Rate
Chin - ✔✔10 - 100Hz 2uv/mm 500Hz
For the following channels, list the:
LFF - HFF Sensitivity Sampling Rate
Legs
Snore - ✔✔10 - 100Hz 7uv/mm 500Hz
What effect on sleep time will pts with cardiac arrhythmias most likely experience -
✔✔Decreased TST
What effect on sleep time will pts with pacemakers most likely experience - ✔✔Increased TST
List three important aspects regarding the sleep techs role as it pertains to pt safety -
✔✔Electrical safety
Chemical safety
Disaster safety
BMI index:
Normal
Overweight
Obese - ✔✔18.5 - 25 kg/m2
25 - 30 kg/m2
30 or more
, What is the role of the sympathetic nervous system - ✔✔Fight or Flight
What is the role of the parasympathetic nervous system - ✔✔controls smooth muscles (i.e.
regulates hr, digestion
This structure of the brain communicates with the cerebral cortex and if damaged, coma is
likely to occur - ✔✔Thalamus
The SCN is located in which structure of the brain - ✔✔Hypothalamus
What external factor is the SCN affected by and what is the function of the SCN - ✔✔Light
SCN is pacemaker for the circadian rhythm
Resp center of brain - ✔✔Pons and MEDULLA
What type of lead placement is most often used to record ECG in sleep studies - ✔✔Single
Modified EKG Lead II using torso electrode placement is RECOMMENDED
Hypoxiema and hypokalemia are often causes of what cardiac arrhythmia - ✔✔PVC
What is another name for asystole and how many leads are required to confirm this
arrhythmia - ✔✔"Ventricular Standstill"
ALWAYS 2 LEADS
Which heart block, defined as a PR interval greater than 0.20sec, may be caused ischemia and
digitalis - ✔✔1st Degree AV block
("If the R is far from the P then you have a 1st degree)
Which heart block presents as an increasing longer and longer PR interval with a dropped QRS
- ✔✔2nd degree AV block Mobitz I (WENCHEBACH)
Questions with Accurate Rationales
In the 10-20 system, the sagittal, coronal planes are divided what % - ✔✔20%
From naison to Fpz is what %
From Inion to Oz is what %
From M1/M2 to T3/T4 is what % - ✔✔10%
From O1/O2 to Oz is what %
From Fp1/Fp2 to Fpz is what % - ✔✔5%
In the 10-20 system, the parasagettial planes (Fp1 to O1) and (Fp2 to O2) are divided into
what % - ✔✔25%
Fp1 - F3 - C3 - P3 - O1 (left)
Fp2 - F4 - C4 - P4 - O2 (right)
If the distance from Fp2 to O2 is 30cm, what is the distance from C4 to P4 - ✔✔7.5cm (25%
of 30cm)
For the following channels, list the :
LFF - HFF Sensitivity Sampling Rate
F4-M1
C4-M1
O2-M1
E1-M2
E2-M2 - ✔✔0.3 - 35Hz 7uv/mm 500Hz
For the following channels, list the:
,LFF - HFF Sensitivity Sampling Rate
ECG - ✔✔0.3 - 70Hz 20uv/mm 500Hz
For the following channels, list the
LFF - HFF Sensitivity Sampling Rate
Chin - ✔✔10 - 100Hz 2uv/mm 500Hz
For the following channels, list the:
LFF - HFF Sensitivity Sampling Rate
Legs
Snore - ✔✔10 - 100Hz 7uv/mm 500Hz
What effect on sleep time will pts with cardiac arrhythmias most likely experience -
✔✔Decreased TST
What effect on sleep time will pts with pacemakers most likely experience - ✔✔Increased TST
List three important aspects regarding the sleep techs role as it pertains to pt safety -
✔✔Electrical safety
Chemical safety
Disaster safety
BMI index:
Normal
Overweight
Obese - ✔✔18.5 - 25 kg/m2
25 - 30 kg/m2
30 or more
, What is the role of the sympathetic nervous system - ✔✔Fight or Flight
What is the role of the parasympathetic nervous system - ✔✔controls smooth muscles (i.e.
regulates hr, digestion
This structure of the brain communicates with the cerebral cortex and if damaged, coma is
likely to occur - ✔✔Thalamus
The SCN is located in which structure of the brain - ✔✔Hypothalamus
What external factor is the SCN affected by and what is the function of the SCN - ✔✔Light
SCN is pacemaker for the circadian rhythm
Resp center of brain - ✔✔Pons and MEDULLA
What type of lead placement is most often used to record ECG in sleep studies - ✔✔Single
Modified EKG Lead II using torso electrode placement is RECOMMENDED
Hypoxiema and hypokalemia are often causes of what cardiac arrhythmia - ✔✔PVC
What is another name for asystole and how many leads are required to confirm this
arrhythmia - ✔✔"Ventricular Standstill"
ALWAYS 2 LEADS
Which heart block, defined as a PR interval greater than 0.20sec, may be caused ischemia and
digitalis - ✔✔1st Degree AV block
("If the R is far from the P then you have a 1st degree)
Which heart block presents as an increasing longer and longer PR interval with a dropped QRS
- ✔✔2nd degree AV block Mobitz I (WENCHEBACH)
