J Clin Monit Comput - Noninvasive continuous beat-to-beat radial artery pressure via TL-200 applanation tonometry.


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The Tensys TL-200(?) noninvasive beat-to-beat blood pressure (BP) monitor displays continuous radial artery waveform as well as systolic, mean and diastolic BP from a pressure sensor directly over the radial artery at the wrist. It locates the site of maximal radial pulse signal, determines mean BP from maximal pulse waveform amplitude at optimal artery compression and then derives systolic and diastolic BP. We performed a cross-sectional study of TL-200 BP comparisons with contralateral invasive radial artery (A-Line) BP values in 19 subjects during an average 2.5?h of general anesthesia for a wide range of surgical procedures. Two hundred and fifty random sample pairs/patient resulted in 4,747 systolic, mean and diastolic BP pairs for analysis. A-Line BP ranged from 29?mm?Hg diastolic to 211?mm?Hg systolic, and heart rate varied between 38 and 210 beats/min. Bland-Altman analysis showed an average 2.3?mm?Hg TL-200 versus A-Line systolic BP bias and limits of agreement (1.96 SD) were???15.3?mm?Hg. Mean BP showed a 2.3?mm?Hg TL-200 bias and???11.7?mm?Hg limits of agreement, while diastolic BP showed a 1.7?mm?Hg bias and???12.3?mm?Hg limits of agreement. Coefficients of determination for TL-200 and A-Line BP regression were r??=?0.86 for systolic, r??=?0.86 for mean, and r??=?80 for diastolic BP, respectively, with no apparent change in correlation at low or high BP. Bland-Altman analysis suggested satisfactory agreement between TL-200 noninvasive beat-to-beat BP and invasive A-Line BP. Paired TL-200/A-Line BP comparisons showed a high coefficient of determination.

Resumo Limpo

tensi tl noninvas beattobeat blood pressur bp monitor display continu radial arteri waveform well systol mean diastol bp pressur sensor direct radial arteri wrist locat site maxim radial puls signal determin mean bp maxim puls waveform amplitud optim arteri compress deriv systol diastol bp perform crosssect studi tl bp comparison contralater invas radial arteri alin bp valu subject averag h general anesthesia wide rang surgic procedur two hundr fifti random sampl pairspati result systol mean diastol bp pair analysi alin bp rang mmhg diastol mmhg systol heart rate vari beatsmin blandaltman analysi show averag mmhg tl versus alin systol bp bias limit agreement sd weremmhg mean bp show mmhg tl bias andmmhg limit agreement diastol bp show mmhg bias andmmhg limit agreement coeffici determin tl alin bp regress r systol r mean r diastol bp respect appar chang correl low high bp blandaltman analysi suggest satisfactori agreement tl noninvas beattobeat bp invas alin bp pair tlalin bp comparison show high coeffici determin

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