SDS - EXAM QUESTIONS AND CORRECT
ANSWERS VERIFIED 2025/2026.
A pt is recently dx with a REM d/o wishes to have another sleep study in a different lab to
confirm the dx. What would the sleep tech expect to observe that would confirm the pt dx of a
REM d/o?
a. decreased REM latency
b. decreased 1st period of REM
c. decreased REM activity
d. decreased REM percentage to total sleep - ANS a. decreased REM latency
The AASM grants lab accreditation for a period of how many years?
a. 1
b. 3
c.5
d.7 - ANS c.5
While performing a PSG on a pt, the ECG channel becomes a straight line. What should the
sleep tech do first?
a. call a code
b. Evaluate the pt
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,c. Begin CPR
d. Check the ECG electode - ANS b. Evaluate the pt
During an evaluation of an 80 year old man for PSG, his daugther explains to the dr that her
father often becomes confused and often upset esp in the early evening. The man shows signs
of dementia. Which of the following is the most appropriate conclusion on the basis of this
information?
a. the pt has signs of Alzheimers
b. the pt has signs of delusional beliefs
c. the pt shows signs of sundowning
d. this is normal response for his age - ANS c. the pt shows signs of sundowning
While viewing an ECG from a pt, the tech notes that the T wave is upright and relatively the
same size as the P wave. How should this be interpreted?
a. Depolarization of the heart
b. Atrial contraction
c. Repolarization of the heart
d. Ventricular depolarizatio - ANS c. Repolarization of the heart
If the distance from Fpz to Oz is 48cm, what is the distance from Pz to Oz?
a. 12.4cm
b. 11.6cm
c. 9.6cm
d. 4.8cm - ANS c. 9.6cm
A dr orders transcutaneous monitoring during a PSG for a 34 year old female with anemia. The
tech should expect the displayed results values to be:
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, a. the same as the pt values
b. lower than the pt values
c. higher than the pt values
d. out of acceptable range - ANS b. lower than the pt values
The term "vegetative organism" refers to
a. the destruction of all microorganisms
b. a resistant form of bacteria
c. growing microorganisms
d. the introduction of disease-causing microorganisms - ANS c. growing microorganisms
What is the recommended initial pressure for a pt receiving CPAP therapy?
a. 3cmH2O
b. 4cmH2O
c. 5cmH2O
d. 6cmH2O - ANS b. 4cmH2O
When the sensitivity of an amplifier is increased from 10uv/mm to 5uv/mm, the pen deflection
should:
a. double
b. increase by 5 times
c. decrease by half
d. decrease by 10 times - ANS c. decrease by half
When informing a pt of his medical rights, which of the following should NOT be included?
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
ANSWERS VERIFIED 2025/2026.
A pt is recently dx with a REM d/o wishes to have another sleep study in a different lab to
confirm the dx. What would the sleep tech expect to observe that would confirm the pt dx of a
REM d/o?
a. decreased REM latency
b. decreased 1st period of REM
c. decreased REM activity
d. decreased REM percentage to total sleep - ANS a. decreased REM latency
The AASM grants lab accreditation for a period of how many years?
a. 1
b. 3
c.5
d.7 - ANS c.5
While performing a PSG on a pt, the ECG channel becomes a straight line. What should the
sleep tech do first?
a. call a code
b. Evaluate the pt
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,c. Begin CPR
d. Check the ECG electode - ANS b. Evaluate the pt
During an evaluation of an 80 year old man for PSG, his daugther explains to the dr that her
father often becomes confused and often upset esp in the early evening. The man shows signs
of dementia. Which of the following is the most appropriate conclusion on the basis of this
information?
a. the pt has signs of Alzheimers
b. the pt has signs of delusional beliefs
c. the pt shows signs of sundowning
d. this is normal response for his age - ANS c. the pt shows signs of sundowning
While viewing an ECG from a pt, the tech notes that the T wave is upright and relatively the
same size as the P wave. How should this be interpreted?
a. Depolarization of the heart
b. Atrial contraction
c. Repolarization of the heart
d. Ventricular depolarizatio - ANS c. Repolarization of the heart
If the distance from Fpz to Oz is 48cm, what is the distance from Pz to Oz?
a. 12.4cm
b. 11.6cm
c. 9.6cm
d. 4.8cm - ANS c. 9.6cm
A dr orders transcutaneous monitoring during a PSG for a 34 year old female with anemia. The
tech should expect the displayed results values to be:
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, a. the same as the pt values
b. lower than the pt values
c. higher than the pt values
d. out of acceptable range - ANS b. lower than the pt values
The term "vegetative organism" refers to
a. the destruction of all microorganisms
b. a resistant form of bacteria
c. growing microorganisms
d. the introduction of disease-causing microorganisms - ANS c. growing microorganisms
What is the recommended initial pressure for a pt receiving CPAP therapy?
a. 3cmH2O
b. 4cmH2O
c. 5cmH2O
d. 6cmH2O - ANS b. 4cmH2O
When the sensitivity of an amplifier is increased from 10uv/mm to 5uv/mm, the pen deflection
should:
a. double
b. increase by 5 times
c. decrease by half
d. decrease by 10 times - ANS c. decrease by half
When informing a pt of his medical rights, which of the following should NOT be included?
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
