2021
Can the complete blood count be used as a reliable screening tool for obstructive sleep apnea?
Cummins E, Waseem R, Piyasena D, Wang CY, Suen C, Ryan C, Wong J, Kryger M, Chung F. Can the complete blood count be used as a reliable screening tool for obstructive sleep apnea? Sleep And Breathing 2021, 26: 613-620. PMID: 34185230, DOI: 10.1007/s11325-021-02383-3.Peer-Reviewed Original ResearchConceptsApnea-hypopnea indexComplete blood countMean SpO2Intermittent hypoxiaBlood countScreening toolObstructive sleep apneaMean oxygen saturationBody mass indexMethodsThis retrospective studyNormal clinical rangeObstructive sleep apnea screeningHome sleep studiesReliable screening toolSleep apnea screeningSevere OSAOSA severityRed blood cellsSurgical patientsIndependent predictorsMass indexSleep apneaAHI scoreRetrospective studySleep studies
2008
Association of Sleep Apnea Severity and Obesity with Insulin Resistance, C-Reactive Protein, and Leptin Levels in Male Patients with Obstructive Sleep Apnea
Kapsimalis F, Varouchakis G, Manousaki A, Daskas S, Nikita D, Kryger M, Gourgoulianis K. Association of Sleep Apnea Severity and Obesity with Insulin Resistance, C-Reactive Protein, and Leptin Levels in Male Patients with Obstructive Sleep Apnea. Lung 2008, 186: 209-217. PMID: 18365276, DOI: 10.1007/s00408-008-9082-x.Peer-Reviewed Original ResearchConceptsObstructive sleep apnea syndromeSleep apnea severityObstructive sleep apneaNon-OSA groupBody mass indexModerate OSAS groupCRP levelsInsulin resistanceApnea severityOSAS groupMale patientsLeptin levelsSleep apneaSevere obstructive sleep apnea syndromeHomeostasis model assessment methodSevere sleep apneaSevere OSAS groupSleep apnea syndromeC-reactive proteinTotal sleep timeNocturnal hypoxemiaApnea syndromeModel assessment methodHip ratioMass index
1998
Susceptibility of LDL to Oxidative Stress in Obstructive Sleep Apnea
Wali S, Bahammam A, Massaeli H, Pierce G, Iliskovic N, Singal P, Kryger M. Susceptibility of LDL to Oxidative Stress in Obstructive Sleep Apnea. Sleep 1998, 21: 290-296. PMID: 9595608, DOI: 10.1093/sleep/21.3.290.Peer-Reviewed Original ResearchConceptsLow-density lipoproteinObstructive sleep apneaOSA patientsNormal controlsOxidative stressSleep apneaPatient groupSevere hypoxiaSusceptibility of LDLFree radical challengeSame age groupCPAP therapySevere hypoxemiaRed blood cellsCardiovascular diseaseAntioxidant reserveGeneral populationPatientsIndividual low-density lipoproteinHours of exposureControl groupAge groupsGlutathione peroxidaseBlood cellsConjugated dienes
1993
Review: Sleep in Heart Failure
Yamashiro Y, Kryger M. Review: Sleep in Heart Failure. Sleep 1993, 16: 513-523. PMID: 8235235, DOI: 10.1093/sleep/16.6.513.Peer-Reviewed Reviews, Practice Guidelines, Standards, and Consensus StatementsNocturnal Cluster Headache Associated with Sleep Apnea. A Case Report
Buckle P, Kerr P, Kryger M. Nocturnal Cluster Headache Associated with Sleep Apnea. A Case Report. Sleep 1993, 16: 487-489. PMID: 8378690, DOI: 10.1093/sleep/16.5.487.Peer-Reviewed Original ResearchConceptsObstructive sleep apneaSleep apneaCluster headacheRapid eye movement (REM) sleepChronic cluster headacheEye movement sleepNasal CPAPOxygen desaturationCase reportMovement sleepHeadache AssociatedBackup rateREM sleepTypical headacheHeadacheApneaSleep labFurther treatmentSleepDesaturationTreatmentBiPAPCPAPMedications
1990
Sleep and heart failure.
Kryger M. Sleep and heart failure. European Respiratory Journal 1990, 3: 1103-4. PMID: 2090470, DOI: 10.1183/09031936.93.03101103.Peer-Reviewed Original Research
1989
The effect of oxygen on respiration and sleep in patients with congestive heart failure.
Hanly P, Millar T, Steljes D, Baert R, Frais M, Kryger M. The effect of oxygen on respiration and sleep in patients with congestive heart failure. Annals Of Internal Medicine 1989, 111: 777-82. PMID: 2817624, DOI: 10.7326/0003-4819-111-10-777.Peer-Reviewed Original ResearchConceptsStable congestive heart failureCheyne-Stokes respirationCongestive heart failureHeart failureTotal sleep timeOxygen therapySleep timeStage 1 NREM sleepPlacebo-controlled crossover studyLow-flow oxygenNocturnal oxygen saturationNocturnal oxygen therapyOutpatient cardiology clinicApnea-hypopnea indexNumber of arousalsStage 1 sleepStage 2 sleepSlow-wave sleepHyperpneic phaseNocturnal hypoxemiaSleep hypoxemiaMale patientsNasal cannulaeCardiology clinicCrossover study
1982
Sleep, Arousals, and Oxygen Desaturation in Chronic Obstructive Pulmonary Disease
Fleetham J, West P, Mezon B, Conway W, Roth T, Kryger M. Sleep, Arousals, and Oxygen Desaturation in Chronic Obstructive Pulmonary Disease. American Journal Of Respiratory And Critical Care Medicine 1982, 126: 429-33. PMID: 7125332, DOI: 10.1164/arrd.1982.126.3.429.Peer-Reviewed Original ResearchConceptsOxygen desaturationArousal frequencySleep qualityChronic obstructive pulmonary diseaseAge-matched normal subjectsLower mean SaO2Role of hypoxemiaArterial oxygen desaturationObstructive pulmonary diseaseRoom air breathingArterial O2 saturationPoor sleep qualityReduced sleep timeSleep stage changesApneic episodesPulmonary functionOxygen therapyPulmonary diseaseSupplemental oxygenMean SaO2Sleep disruptionREM sleepNormal subjectsO2 saturationPatients
1980
The Effect of Low Flow Oxygen Therapy on the Chemical Control of Ventilation in Patients with Hypoxemic COPD1–3
Fleetham J, Bradley C, Kryger M, Anthonisen N. The Effect of Low Flow Oxygen Therapy on the Chemical Control of Ventilation in Patients with Hypoxemic COPD1–3. American Journal Of Respiratory And Critical Care Medicine 1980, 122: 833-40. PMID: 6779682, DOI: 10.1164/arrd.1980.122.6.833.Peer-Reviewed Original ResearchConceptsChronic obstructive pulmonary diseaseHypoxemic chronic obstructive pulmonary diseaseOxygen therapyHypoxic responseLow-flow oxygen therapyCentral ventilatory driveFlow oxygen therapyNocturnal oxygen therapyObstructive pulmonary diseaseArterial O2 saturationNocturnal oxygenPulmonary diseaseSuch patientsVentilatory driveMinute ventilationInspiratory flowO2 saturationPatientsTherapyContinuous oxygenMonthsHypoxiaInitial responseHypoxemiaVentilationSleep Breathing Abnormalities in Kyphoscoliosis1–3
Mezon B, West P, Israels J, Kryger M. Sleep Breathing Abnormalities in Kyphoscoliosis1–3. American Journal Of Respiratory And Critical Care Medicine 1980, 122: 617-21. PMID: 7436128, DOI: 10.1164/arrd.1980.122.4.617.Peer-Reviewed Original ResearchConceptsBreathing abnormalitiesGreater oxygen desaturationPulmonary function testsArterial oxygen saturationCor pulmonaleChronic hypoxemiaOxygen desaturationCentral apneaFunction testsClinical evidencePhysiologic disturbancesSevere kyphoscoliosisMovement sleepSevere derangementThoracic deformityArterial PCO2Oxygen saturationSevere episodesChemical driveAbnormalitiesSleepPatientsDerangementPulmonaleHypoxemiaChemical Control of Ventilation and Sleep Arterial Oxygen Desaturation in Patients with COPD1–3
Fleetham J, Mezon B, West P, Bradley C, Anthonisen N, Kryger M. Chemical Control of Ventilation and Sleep Arterial Oxygen Desaturation in Patients with COPD1–3. American Journal Of Respiratory And Critical Care Medicine 1980, 122: 583-9. PMID: 7436124, DOI: 10.1164/arrd.1980.122.4.583.Peer-Reviewed Original ResearchConceptsO2 saturationSleep desaturationVentilatory sensitivityRapid eye movement (REM) sleepNocturnal changesArterial oxygen desaturationLowest O2 saturationHypoxic ventilatory responseArterial O2 saturationEye movement sleepHypoxemic COPDNocturnal desaturationOxygen desaturationLung functionBlood gasesVentilatory responseMovement sleepVentilatory controlPatientsMaximal desaturationSleepDesaturationSleep stagesHypercapniaWakefulness
1978
Excessive Polycythemia of High Altitude: Role of Ventilatory Drive and Lung Disease1–3
Kryger M, McCullough R, Doekel R, Collins D, Weil J, Grover R. Excessive Polycythemia of High Altitude: Role of Ventilatory Drive and Lung Disease1–3. American Journal Of Respiratory And Critical Care Medicine 1978, 118: 659-666. PMID: 707889, DOI: 10.1164/arrd.1978.118.4.659.Peer-Reviewed Original ResearchConceptsCause of hypoxemiaExcessive polycythemiaPolycythemic patientsTidal volumeNormal subjectsExcessive hypoxemiaChemical driveAbnormal breathing patternsAlveolar-arterial differenceSmall tidal volumesHigh-altitude residentsRespiratory QuestionnaireSpirometric featuresHypoxic depressionVentilatory driveLung diseaseControl subjectsVentilatory responseMinute ventilationNormal lungBreathing patternHypoxemiaPatientsPolycythemiaDead spaceFamilial aspects of decreased hypoxic drive in endurance athletes
Scoggin C, Doekel R, Kryger M, Zwillich C, Weil J. Familial aspects of decreased hypoxic drive in endurance athletes. Journal Of Applied Physiology 1978, 44: 464-468. PMID: 632187, DOI: 10.1152/jappl.1978.44.3.464.Peer-Reviewed Original ResearchConceptsVentilatory responseEndurance athletesLong-distance runnersHypoxic ventilatory responseUnexplained respiratory failureFamilies of patientsHypercapnic responseRespiratory failureVentilatory responsivenessEndurance athleticsHealthy parentsShape parameter ANonathletic controlsHypoxic responseHypoxiaSimilar extentFamilial aspectsHypercapniaConsequence of conditioningAthletesRecent studiesFamilial influencesRunnersResponsePatientsImpaired Oxygenation During Sleep in Excessive Polycythemia of High Altitude: Improvement with Respiratory Stimulation
Kryger M, Glas R, Jackson D, McCullough R, Scoggin C, Grover R, Weil J. Impaired Oxygenation During Sleep in Excessive Polycythemia of High Altitude: Improvement with Respiratory Stimulation. Sleep 1978, 1: 3-17. PMID: 756057, DOI: 10.1093/sleep/1.1.3.Peer-Reviewed Original ResearchConceptsMedroxyprogesterone acetatePolycythemic patientsSevere hypoxemiaExcessive polycythemiaDouble-blind crossover trialMean lowest SaO2REM stage sleepDegree of hypoxemiaHigh-altitude residentsAwake SaO2Nocturnal SaO2Sleep hypoxemiaStage sleepImpaired oxygenationCrossover trialMean SaO2Lowest SaO2Control subjectsHypoxemiaTherapeutic effectOxygen saturationExcessive hypoxemiaSaO2Breathing patternPatientsChronic Mountain Polycythemia: A Disorder of the Regulation of Breathing during Sleep?
Kryger M, Weil J, Grover R. Chronic Mountain Polycythemia: A Disorder of the Regulation of Breathing during Sleep? CHEST Journal 1978, 73: 303-304. DOI: 10.1378/chest.73.2_supplement.303.Peer-Reviewed Original Research
1976
Depression of Hypoxic Ventilatory Response by Nitrous Oxide
Yacoub O, Doell D, Kryger M, Anthonisen N. Depression of Hypoxic Ventilatory Response by Nitrous Oxide. Anesthesiology 1976, 45: 385-389. PMID: 973689, DOI: 10.1097/00000542-197610000-00006.Peer-Reviewed Original ResearchClinical Semi-Starvation — Depression of Hypoxic Ventilatory Response
Doekel R, Zwillich C, Scoggin C, Kryger M, Weil J. Clinical Semi-Starvation — Depression of Hypoxic Ventilatory Response. New England Journal Of Medicine 1976, 295: 358-361. PMID: 819829, DOI: 10.1056/nejm197608122950703.Peer-Reviewed Original ResearchConceptsHypoxic ventilatory responseVentilatory responseHypercapnic ventilatory responseMetabolic rateRespiratory failureIntravenous fluidsDecreased metabolic rateCarbohydrate dietNormal subjectsCaloric restrictionDay 10HypercapniaSupplemental electrolytesResponse responseSubjectsResponseHypoxemiaDecreaseHypoxiaAlimentationEffect of Meperidine on Occlusion Pressure Responses to Hypercapnia and Hypoxia with and without External Inspiratory Resistance1–3
Kryger M, Yacoub O, Dosman J, Macklem P, Anthonisen N. Effect of Meperidine on Occlusion Pressure Responses to Hypercapnia and Hypoxia with and without External Inspiratory Resistance1–3. American Journal Of Respiratory And Critical Care Medicine 1976, 114: 333-40. PMID: 973724, DOI: 10.1164/arrd.1976.114.2.333.Peer-Reviewed Original ResearchConceptsInspiratory resistanceNormal subjectsOcclusion pressure responsesInspiratory motor outputEffect of meperidineOral meperidineVentilatory responseAcute increaseInspiratory effortClosed airwayMeperidineHypercapniaProgressive hypoxiaMotor outputMore depressionHypoxiaHypoxic responsePressure responseP0.1Combination of resistanceSubjectsResponseAirway
1975
Effect of inspiratory resistance on occlusion pressure in hypoxia and hypercapnia
Kryger M, Yacoub O, Anthonisen N. Effect of inspiratory resistance on occlusion pressure in hypoxia and hypercapnia. Respiratory Physiology & Neurobiology 1975, 24: 241-248. PMID: 1188196, DOI: 10.1016/0034-5687(75)90016-x.Peer-Reviewed Original Research