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a new way to measure & stage sleep?
Physiol Meas. 2009 Oct 1;30(11):1163-1170.
Slow-wave sleep estimation on a load-cell-installed bed: a non-constrained method.
Choi BH, Chung GS, Lee JS, Jeong DU, Park KS.
Polysomnography (PSG) involves simultaneous and continuous monitoring of relevant normal and abnormal physiological activity during sleep. At present, an electroencephalography-based rule is generally used for classifying sleep stages. However, scoring the PSG record is quite laborious and time consuming. In this paper, movement and cardiac activity were measured unobtrusively by a load-cell-installed bed, and sleep was classified into two stages: slow-wave sleep and non-slow-wave sleep. From the measured cardiac activity, we extracted heartbeat data and calculated heart rate variability parameters: standard deviation of R-R intervals SDNN, low frequency-to-high frequency ratio, alpha of detrended fluctuation analysis and correlation coefficient of R-R interval. The developed system showed a substantial concordance with PSG results when compared using a contingency test. The mean epoch-by-epoch agreement between the proposed method and PSG was 92.5% and Cohen's kappa was 0.62.
Slow-wave sleep estimation on a load-cell-installed bed: a non-constrained method.
Choi BH, Chung GS, Lee JS, Jeong DU, Park KS.
Polysomnography (PSG) involves simultaneous and continuous monitoring of relevant normal and abnormal physiological activity during sleep. At present, an electroencephalography-based rule is generally used for classifying sleep stages. However, scoring the PSG record is quite laborious and time consuming. In this paper, movement and cardiac activity were measured unobtrusively by a load-cell-installed bed, and sleep was classified into two stages: slow-wave sleep and non-slow-wave sleep. From the measured cardiac activity, we extracted heartbeat data and calculated heart rate variability parameters: standard deviation of R-R intervals SDNN, low frequency-to-high frequency ratio, alpha of detrended fluctuation analysis and correlation coefficient of R-R interval. The developed system showed a substantial concordance with PSG results when compared using a contingency test. The mean epoch-by-epoch agreement between the proposed method and PSG was 92.5% and Cohen's kappa was 0.62.
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Replies to This Discussion
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Permalink Reply by Rock Conner RRT on
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That's the whole article as far as I know. I don't know whether this will be good technology, but the correlations are intriguing. I am convinced that there will be a day when with weight or infrared or something else we will eliminate al the goop & wires & labor intensity now employed for sleep diagnostics, looking back on these as the pre-enlightened, barbaric days!
Cindy Brown said:Hey Rock is this all there was to the article? No wires attached to the Pt. Don't we want to know about RAM sleep given that's where most folks have their worst OSA? This is however intriguing I, however, would like to know more.
Cindy
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Cindy, well that's the whole abstract. You can look up the journal article if you are more ambitious about this than me.
Rock Conner RRT said:That's the whole article as far as I know. I don't know whether this will be good technology, but the correlations are intriguing. I am convinced that there will be a day when with weight or infrared or something else we will eliminate al the goop & wires & labor intensity now employed for sleep diagnostics, looking back on these as the pre-enlightened, barbaric days!
Cindy Brown said:Hey Rock is this all there was to the article? No wires attached to the Pt. Don't we want to know about RAM sleep given that's where most folks have their worst OSA? This is however intriguing I, however, would like to know more.
Cindy
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Permalink Reply by RockRpsgt on
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I also find it interesting. Without being able to determine sleep stages I don't know if it is better. Have you heard about zzz-ratio?
http://www.zzzratio.com/
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Permalink Reply by D. W. Conn on
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I miss the days of endless papaer, clicking pens, and being sprayed with ink several times a week....sigh, I really do miss it.
Now as for research ...full scoring is required. Iam not buying this new goop...maybe I am just too old.
Rock Conner RRT said:That's the whole article as far as I know. I don't know whether this will be good technology, but the correlations are intriguing. I am convinced that there will be a day when with weight or infrared or something else we will eliminate al the goop & wires & labor intensity now employed for sleep diagnostics, looking back on these as the pre-enlightened, barbaric days!
Cindy Brown said:Hey Rock is this all there was to the article? No wires attached to the Pt. Don't we want to know about RAM sleep given that's where most folks have their worst OSA? This is however intriguing I, however, would like to know more.
Cindy
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