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Polysomnography

About: Polysomnography is a research topic. Over the lifetime, 19527 publications have been published within this topic receiving 858718 citations. The topic is also known as: PSG & polysomnogram.


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Journal ArticleDOI
TL;DR: Although the absolute arrhythmia rate is low, the relative risk of paroxysmal atrial fibrillation and NSVT during sleep is markedly increased shortly after a respiratory disturbance, support a direct temporal link between SDB events and the development of these arrhythmias.

246 citations

Journal ArticleDOI
TL;DR: In this large patient cohort, sleep apnea was prevalent (77%) independent of BMI, and most cases were not diagnosed before bariatric surgical consultation, which support the use of routine screening polysomnography beforebariatric surgery.
Abstract: Background: Obstructive sleep apnea (OSA) is common in morbidly obese patients, with a reported prevalence from 12 to 40%. Preoperative diagnosis of OSA is important for both perioperative airway management and the prevention of postoperative pulmonary complications. BMI has been reported to be an independent risk factor, and has been used recently in scoring systems to help predict OSA. Our hypothesis was that OSA is highly prevalent in patients presenting for bariatric surgery, and that BMI alone is not a good predictor of the presence or absence of sleep apnea. Methods: A cross-sectional study was undertaken of the last 170 consecutive patients presenting for bariatric surgery in a single surgeon's practice. Clinical and demographic data were available from our prospective database, and polysomnography results were reviewed retrospectively. Sleep apnea was noted as present or absent, and graded from mild to severe. The patient population was stratified by BMI into severely obese (BMI 35-39.9), morbidly obese (BMI 40-49.9), super-obese (BMI 50-59.9), and super-super-obese (BMI ≥ 60). Results: OSA had been diagnosed before surgical consultation in 26 of the 170 patients (15.3%). Sleep studies were not available in 7 patients (4.1%). The remaining 137 patients (80.6%) had sleep data available, and 105 (76.6%) had sleep apnea (based on American Board of Sleep Medicine criteria).There was no correlation of sleep apnea with BMI. The overall prevalence of OSA in this cohort was 77% (131/170). Conclusions: In this large patient cohort, sleep apnea was prevalent (77%) independent of BMI, and most cases were not diagnosed before bariatric surgical consultation.These data support the use of routine screening polysomnography before bariatric surgery.

245 citations

Journal ArticleDOI
01 May 2015-Sleep
TL;DR: Current literature demonstrates that myofunctional therapy decreases apnea-hypopnea index by approximately 50% in adults and 62% in children and could serve as an adjunct to other obstructive sleep apnea treatments.
Abstract: OBJECTIVE To systematically review the literature for articles evaluating myofunctional therapy (MT) as treatment for obstructive sleep apnea (OSA) in children and adults and to perform a meta-analysis on the polysomnographic, snoring, and sleepiness data. DATA SOURCES Web of Science, Scopus, MEDLINE, and The Cochrane Library. REVIEW METHODS The searches were performed through June 18, 2014. The Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) statement was followed. RESULTS Nine adult studies (120 patients) reported polysomnography, snoring, and/or sleepiness outcomes. The pre- and post-MT apneahypopnea indices (AHI) decreased from a mean ± standard deviation (M ± SD) of 24.5 ± 14.3/h to 12.3 ± 11.8/h, mean difference (MD) -14.26 [95% confidence interval (CI) -20.98, -7.54], P < 0.0001. Lowest oxygen saturations improved from 83.9 ± 6.0% to 86.6 ± 7.3%, MD 4.19 (95% CI 1.85, 6.54), P = 0.0005. Polysomnography snoring decreased from 14.05 ± 4.89% to 3.87 ± 4.12% of total sleep time, P < 0.001, and snoring decreased in all three studies reporting subjective outcomes. Epworth Sleepiness Scale decreased from 14.8 ± 3.5 to 8.2 ± 4.1. Two pediatric studies (25 patients) reported outcomes. In the first study of 14 children, the AHI decreased from 4.87 ± 3.0/h to 1.84 ± 3.2/h, P = 0.004. The second study evaluated children who were cured of OSA after adenotonsillectomy and palatal expansion, and found that 11 patients who continued MT remained cured (AHI 0.5 ± 0.4/h), whereas 13 controls had recurrent OSA (AHI 5.3 ± 1.5/h) after 4 y. CONCLUSION Current literature demonstrates that myofunctional therapy decreases apnea-hypopnea index by approximately 50% in adults and 62% in children. Lowest oxygen saturations, snoring, and sleepiness outcomes improve in adults. Myofunctional therapy could serve as an adjunct to other obstructive sleep apnea treatments.

245 citations

Journal ArticleDOI
TL;DR: These findings support the hypothesis that brain plasticity during sleep does not involve a unitary process; that is, different types of learning have unique sleep-related memory consolidation mechanisms that act in dissociable brain regions at different times throughout the night.

245 citations

Journal ArticleDOI
15 Dec 2001-Sleep
TL;DR: In this paper, the authors used wrist actigraphy to predict sleep and wakefulness using simple-threshold and multiple-regression methods and found that act levels correspond to deeper states of psg sleep.
Abstract: Study objectives Because sleep and wakefulness differ from each other by the amount of body movement, it has been claimed that the two states can be accurately distinguished by wrist actigraphy. Our objective was to test this claim in lengthy polysomnographic (psg) and actigraphic (acf) samples that included night and day components. Design Fourteen healthy young (21-35 years) and old (70-72 years) men and women lived in a laboratory without temporal cues for 7 days. Each subject continuously wore sleep-recording electrodes as well as 2 wrist-movement recorders. Act measurements were converted to predictions of sleep and wakefulness by simple-threshold and multiple-regression methods. Psg served as the gold standard for calculation of predictive values (PV, the probability that an act prediction is correct by psg criteria). Setting N/A. Participants N/A. Interventions N/A. Measurements and results The 7-day act recordings showed clear circadian cycles of high and low activity that respectively corresponded to subjective days, when subjects were wakeful, and subjective nights when they slept. Lower act levels corresponded to deeper states of psg sleep. Logistic regression on a 20-minute moving average of act gave the highest overall PV's. Nevertheless, the mean PV for sleep (PVS) was only 62.2% in complete, day + night samples. PVS was 86.6% in night samples. Act successfully predicted wakefulness during subjective nights (PVW = 89.6) and accurately measured circadian period length and the extent of sleep-wake consolidation, but it overestimated sleep rate and sleep efficiency. Act systematically decreased before sleep onset and increased before awakening, but reliable transitions among joint psg/act states (the Markov-1 property) were not demonstrated. Conclusions Low PV's and overestimation of sleep currently disqualify actigraphy as an accurate sleep-wake indicator. Actigraphy may, however, by useful for measuring circadian period and sleep-wake consolidation and has face validity as a measure of rest/activity.

245 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20241
20231,010
20221,884
20211,102
20201,023
20191,026