Term
| HFF Frequency Filter or Low Pass Filter |
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Definition
| Lets slower waves through, used to set high frequency recording limits, set to allow only recording of only slower signals. examples:HFF eliminates artifact or external electrical artifact in EEG. Caution: This filter can also attenuate desired high frequencies such as arousals. |
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Term
| LFF AND HFF SETTINGS AND TC. |
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Definition
EEG 0.3/35 TC.4
EOG 0.3/35 TC.4
EMG 5/100HZ TC.03
ECG 0.3/70HZ
TC OF RESPIRATIONS 1.00 |
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Term
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Definition
| MEASURE HOW A SIGNAL IS DISPLAYED & IS DETERMINED BY THE VOLTAGE OF THE SIGNAL & THE LOW AND HIGH FF USED. THE TWO TIME CONSTANTS ARE FALL TIME AND RISE TIME CONSTANT. |
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Term
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Definition
| TIME IT TAKES FOR A SQUARE WAVE TO DECAY TO 37% OF ITS MAX AMPLITUDE. *THIS IS WHAT THE TERM TIME CONSTANT REFERS TO IN PSG* THE LFF FILTER DETERMINES THE FALL TC. INCREASED LFF SETTING WILL DECREASE THE TC. |
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Term
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Definition
| TIME IT TAKES IN SEC FOR THE SQUARE WAVE TO REACH 63% OF ITS MAX AMPLITUDE. HFF DETERMINES THE RISE TC. |
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Term
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Definition
| HIGH FREQUENCY ARTIFACT CAUSED BY HIGH IMPEDANCE, POOR APPLICATION, OR INTERFERANCE FROM SURRONDING ELECTRICAL EQUIP. |
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Term
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Definition
| ATTENUATES SPECIFIC FREQUENCIES SUCH AS 60HZ INTERFERENCE. CAUTION: 60HZ FILTER CAN ELIMINATE EPILEPTIFORM SPIKES AND MUSCLE ACTIVITY. |
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Term
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Definition
| MEASURE OF HOW FREQUENTLY THE SIGNAL IS CONVERTED & IS EXPRESSED IN CYCLES PER SEC. HIGHER SAMPLING RATE=THE MORE FREQUENTLY THE SIGNAL IS SAMPLED, THE MORE FREQUENT THE MORE ACCURATE THE SHAPE, MIN SAMPLING RATE IS 2.5X THE HIGHEST HFF FILTER. SAMPLING FREQUENCY CAN CHANGE WAVEFORM MORPHOLOGY. SHAPE OF WAVERFORM IS DETERMINED BY HOW FREQUENTLY THE SIGNAL IS SAMPLED. |
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Term
| ANALOGUE-TO-DIGITAL CONVERSION |
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Definition
| ELECTRICAL SIGNALS ARE PRODUCED AS A CONTINUOUS OUTPUT. DIGITAL PSG SYSTEMS CONVERT CONTINUOUS WAVEFORM INTO A SERIES OF NUMERIC VALUES. |
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Term
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Definition
| SHORTEN SLEEP LATENCY, DECREASE WASO, INCREASE TST, INCREASE SLEEP SPINDLES, REDUCE REM, SPRESS SWS. |
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Term
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Definition
| SHORT TERM USE,SHORTEN SLEEP LATENCY. AMBIEN-MILD REDUCTION OF REM, NO EFFECT ON N3. SONATA-MAY REPEAT DOSE DURING THE NIGHT ASLONG AS PT CAN SLEEP 4 MORE HOURS. LUNESTA-LONG TERM USE |
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Term
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Definition
| SORTENS SLEEP LATENCY, INCREASES NREM, REDUCES REM,REDUCES TST, REBOUND REM OCCURS WHEN WITHDRAL OCCURS DUE TO ALCOHOL BEING METABOLIZED RAPIDLY. INCREASED SYMPATHETIC NERVOUS SYSTEM (FIGHT OR FLIGHT) WITH SWEATING, INCREASED HEART RATE, INCREASED AROUSALS |
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Term
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Definition
| INCREASE MORNING DROWSINESS. EX. DIPHENHYDRAMINE, BENADRYL+TYLENOL, DIMENHYDRINATE |
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Term
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Definition
| USUAL DOSGE 50-200MG, INCREASE SLEEP LATENCY, REDUCES SLEEP EFFICIENCY, REDUCES SWS IF TAKEN BEFORE BED, WITHDRAWL CAUSES HEADACHES AND IRRITABILITY. |
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Term
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Definition
| SEDATING EFFECTS AT LOW DOSES, ALERTING EFFECTS AT HIGH DOSES. AT BEDTIME INCREASED SLEEP LATENCY, REDUCED TST |
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Term
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Definition
| TO CALCULATE: REM ONSET EPOCH-SLEEP ONSET EPOCH/2. TO CALCULATE SLEEP ONSET EPOCH-LIGHTS OUT EPOCH/2. |
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Term
TOTAL REM TIME
TOTAL STAGE REM% |
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Definition
| TO CALCULATE TOTAL REM TIME: TOTAL # OF REM EPOCHS/2, TO CALCULATE TOTAL STAGE REM: TOT STAGE REM/TST X 100 |
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Term
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Definition
| TIME IN BED-TOTAL WAKE TIME |
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Term
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Definition
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Term
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Definition
| TOTAL # OF STAGE EPOCHS/2 |
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Term
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Definition
| TOTAL # OF AROUSALS X 60/TST |
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Term
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Definition
| TOTAL # OF AROUSALS IN STAGE X 60/TOTAL STAGE TIME |
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Term
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Definition
| TOTAL # OF APNEAS&HYPOPNEAS IN STAGE X 60/TOTAL STAGE TIME |
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Term
| AROSAL INDEX IN EACH POSITION |
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Definition
| TOTAL# OF AROUSALS IN POSITION X60/TOTAL POSITION TIME. EX. TOTAL# OF AROUSALS IN SUPINE X60/TOTAL SUPINE TIME |
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Term
| RDI INDEX IN EACH POSITION |
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Definition
| TOTAL# OF APNEAS&HYPOPNEAS IN POSITION X60/TOTAL POSITION TIME. EX. TOTAL# OF APNEAS& HYPOPNEAS IN SPINE X60/TOTAL SUPINE TIME |
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Term
| TOTAL POSITION TIME (SAME AS TOTAL STAGE TIME) |
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Definition
| TOTAL# OF POSITION EPOCHS/2 |
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Term
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Definition
| TOTAL# OF APNEAS&HYPOPNEAS X60/TST |
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Term
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Definition
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Term
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Definition
| TOTAL# OF PLMS WITH AROUSALS X60/TST |
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Term
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Definition
| TOTAL# OF LIMB MOVEMENTS X60/TST |
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Term
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Definition
| AMOUNT OF FLUCTUATION OF THE SIGNAL IN MICROVOLTS/MILLIMETERS uV/MM MEASURED FROM PEAK TO TROUGH. AMP=ABSOLUTE VALUE/PEAK-TROUGH |
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Term
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Definition
| TOTAL# OF HYPOPNEAS X60/TST |
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Term
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Definition
| MEASURE OF RESISTNCE TO THE FLOW OF ELECTRICAL CURRENT. FACTORS THAT INFLUENCE IMPEDANCE: THICKNESS OF SKULL, THICKNESS OF STRATUM CORNEUM, LENGTH, GAUGE, & CONTINUITY OF ELECTRODE WIRE. |
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Term
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Definition
| HIGH PASS FILTER, ALLOWS HIGHER FREQUENCIES TO PASS UNCHANGED. USED TO REMOVE RESPIRATORY AND SWEAT ARTIFACT. CAUTION: CAN ELIMINATE SWS |
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Term
| BRAIN MECHANISMS OF SLEEP |
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Definition
| WAKE-RAS(RETICULAR ACTIVATING SYSTEM), POSTERIOR HYPOTHALAMUS, NREM-ANTERIOR HYPOTHALAMUS, REM-PONS |
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Term
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Definition
| ALCOHOL-INTERMEDIATE LEVEL FOR SMOOTH AND HARD SURFACES, HALOGENS(CHLORINE), PHENOLS(AMPHYL),QUATERNARY AMMONIUM COMPOUNDS(HITOR),GLUTERALDEHYDE(CIDEX)CAN STERILIZE AND DISINFECT DEPENDING ON EXPOSURE TIME AND CAN CAUSE CHEMICAL BURNS. HYDROGEN PEROXIDE. |
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Term
| SODIUM HYPOCHLORITE BLEACH |
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Definition
| HIGH, LOW, AND INTERMEDIATE DISINFECTION. INEXPENSIVE AND FAST ACTING. MUST CLEAN ITEMS BEFORE, 1:50 FOR 20 MIN-HIGH LEVEL. 1:50 FOR 1OMIN INTERMEDIATE |
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