2012
Using Time-Frequency Analysis of the Photoplethysmographic Waveform to Detect the Withdrawal of 900 mL of Blood
Scully CG, Selvaraj N, Romberg FW, Wardhan R, Ryan J, Florian JP, Silverman DG, Shelley KH, Chon KH. Using Time-Frequency Analysis of the Photoplethysmographic Waveform to Detect the Withdrawal of 900 mL of Blood. Anesthesia & Analgesia 2012, 115: 74-81. PMID: 22543068, DOI: 10.1213/ane.0b013e318256486c.Peer-Reviewed Original ResearchMeSH KeywordsAdultBlood PressureBlood Pressure DeterminationBlood Transfusion, AutologousBlood VolumeBlood Volume DeterminationCluster AnalysisConnecticutElectrocardiographyHeart RateHumansHypovolemiaInfrared RaysMalePhotoplethysmographyPredictive Value of TestsRespiratory MechanicsSensitivity and SpecificitySignal Processing, Computer-AssistedTime FactorsConceptsML of bloodArterial blood pressureBlood lossBlood pressureHeart rateHeart rate frequencyBlood withdrawalML blood lossMean percent decreaseBlood volume lossHeart rate componentSignificant changesPhotoplethysmographic waveformSpontaneous breathingTrauma settingCuff measurementsPPG waveformBlood reinfusionHealthy volunteersStandard electrocardiogramBloodEarly detectionEar PPG signalsBaselineConfidence intervals
2001
Different Responses of Ear and Finger Pulse Oximeter Wave Form to Cold Pressor Test
Awad A, Ghobashy M, Ouda W, Stout R, Silverman D, Shelley K. Different Responses of Ear and Finger Pulse Oximeter Wave Form to Cold Pressor Test. Anesthesia & Analgesia 2001, 92: 1483-1486. PMID: 11375830, DOI: 10.1097/00000539-200106000-00026.Peer-Reviewed Original ResearchConceptsCold pressor testVasoconstrictive responsePressor testIce water immersionPlethysmographic amplitudeVasoconstrictive effectSympathetic toneContralateral handHealthy volunteersSystemic circulationIRB approvalCold stimuliClinical settingEarSignificant disparitiesSignificant changesSuitable monitorFingerResponseEar signalsWater immersionPlethysmography