PSG 260 Midterm Questions and Answers graded A+

PSG 260 Midterm Questions and Answers graded A+ Polarity Refers to: Upward or downward deflection of the wave Refer to Channel 3. What is the Output Voltage? Cz-C4:-50uV - 200 uV -250uV Using two ground electrodes is called: Ground Loop Using two active electrodes in each EEG channel of the montage is called Bipolar The ability of the amplifier to reject unwanted signals and prodcuce cleaner recordings is Common Mode Rejection Ratio (CMRR) your LFF for EEG channels is set at 5 Hz. Are delta waves affected? Yes -- (LFF is a Low Frequency Filter -- it cuts off eveything Below. Delta <4 Hz, so it would be affected) A measure of electrical resistance is: Impedance. Measures blood oxygenation: Oximeter. Measures acidity levels in the esophagus: pH probe. Snap electrodes differ from cup electrodes in that: Cup electrodes require the use of paste. The desired sampling rate for equipment is: 500 Hz. (reasoning: the higher the sampling rate the better) Piezo-electric belts are used to record Respiratory Effort. A Capnogram measures End-Tidal CO2 (ETCO2) (End-Tidal means: at the end of a breath) R=V/I is the calculation for ___; which is measured in_____. Ohm's Law; Ohms. Currents that rapidly cycle from positive to negative voltages are: AC (Ac stands for Alternating Current) When completing a patient hookup, the ground electrode is optional False. The higher the sampling rate, the better the quality of the recording. True. The following Montage is an example of: F3 - M2 F4 - M1 C3 - M2 C4 - M1 Referential. When describing the signal pathway, the signal recorded from the cup electrode [goes?] to the Head Box. MSLT tests the patient __ whereas the MWTtests the patient ___. Falling asleep; staying awake. Narcolepsy is best defined by MSLT. WIth the MSLT and MWT a full patient hookup is required, including EEG, REspiratory, and Pulse Oximeter. False MSLT naps are terminated after Both: 20 minutes of no sleep OR 15 minutes of Sleep Onset. The eMSLT is not recommended when following a Split Night Study. True. Ambulatory Sleep studies are believed to decrease the severity of the first night effect True (Ambulatory means the patient is in their own home -- they're not nervous about being in the lab) pH probes are used to detect REflux. Used to determine male impotence NPT (stands for nocturnal penile tumescence) A common complaint when using esophageal balloon recording is it is invasive and uncomfortable. Your patient's pH level goes from a baseline of 7.40 to 5.7 during the PSG. this would indicate: Increased Acidity. A measure of Carbon Dioxide levels in the blood PCO2. Males have erections during REM (is that what the E stands for?) It is important to include this when recording a REM behavior disorder patient All of the Above: Arm Leads, Video, Chin EMG. During an MSLT recording, it is acceptable for patients to lie on the bed in between naps. False. (in between naps you don't want the patient to reach REM. the Bed increases the sleep drive) MSLT montages are not required to include Respiratory channels OR Leg Channels. REM Behavior montages might include Arm Leads. seizure disorder montages might include Additional EEG leads. The purpose of amplifier calibration is to ensure: All of the above: Mechanical Baseline, Electrical Baseline, Time Axes. The AASM recommends that amplifier calibration is to be performed: At the beginning and end of each study. Frequency of waveforms are defined in Hz. The function of Time Constant is similar to this filter LFF. Standard EEG setting is: 0.5 to 35 Hz. This refers to the vertical positioning of the channel alignments when the machine is turned off. Mechanical Baseline. While performing calibration you notice that channel 1 is not deflecting at the same moment in time as the other channels. The problem is with the: Time axis. You've asked the patient to open and close her eyes, blink several times, flex her feet, and hold her breath. You just performed: Biocalibration. this signals the beginning of the sleep study Lights Out. The patient's pre-test questionnaire asks if the patient has consumed alcohol, caffeine, or chocolate on the day of the test because: it could affect the results of the test. Technician notes during the study should include: The Time the note is recorded, body position, and comments. One of the most important details when performing a sleep study is: Physician's order. The international Classification of Sleep disorders (ICSD) categorizing all known sleep disorders was developed by AASM. This term is used to classify a person who believes they have insomnia, but testing shows that they in fact do sleep. Paradoxical Insomnia. Used to describe a person's sleep habits. Sleep hygiene. Your patient complains of falling asleep late and waking up late. His PSG was normal. What is his likely diagnosis? Delayed Sleep-Wake Phase Syndrome. This respiratory pattern is characterized by Crescendo and Decrescendo breathing Cheyne Stokes breathing. in the absence of light/dark stimulus, the circadian rhythm functions on the free run cycle. your PSG patient is a 4 year old female with excessive daytime sleepiness. during the study you notice she rolls her head while asleep. she likely has rhythmic movement disorder. while falling asleep, your 70 year old male patient awakens with severe pain in his calves. He likely has nocturnal leg cramps Your patient reports having bizarre and sometimes violent episodes during sleep. he may have parasomnia Sleep terrors are sudden awakenings that usually involve a loud scream with feelings of intense fear with the patient returning directly back to sleep with no memory of the event. this awakening occurs out of this sleep stage: N3. Periodic Limb Movement Disorder worsens during REM sleep. False. A feeling of falling, surprise or fear that is accompanied by a sudden muscle jerk: Sleep start (aka hypnic jerk) Hypnagogic refers to ____whereas Hypnopompic refers to Sleep onset; Sleep awakening. Cataplexy is seen in approximately ___% of narcoleptic patients. 70%. When diagnosing a patient who is complaining of falling asleep during the day it is important to: first perform overnight PSG sleep study to rule out the possibility of another sleep disorder. Excessive sleepiness is referred to as hypersomnia. An abnormal MSLT would consist of Both A and B: mean sleep onset of less than 8 minutes; Two REM periods during 5 naps. A physical movement or action occurring during sleep that is unwanted is called a parasomnia. A patient's inability to respond to bladder sensations will likely suffer from Sleep enuresis (peein' urself)