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Pleth index variability infants

Lena M Nilsson
Pulse oximetry is based on the technique of photoplethysmography (PPG) wherein light transmitted through tissues is modulated by the pulse. In addition to variations in light modulation by the cardiac cycle, the PPG signal contains a respiratory modulation and variations associated with changing tissue blood volume of other origins. Cardiovascular, respiratory, and neural fluctuations in the PPG signal are of different frequencies and can all be characterized according to their sinusoidal components. PPG was described in 1937 to measure blood volume changes...
October 2013: Anesthesia and Analgesia
H-J Byon, C-W Lim, J-H Lee, Y-H Park, H-S Kim, C-S Kim, J-T Kim
BACKGROUND: The purpose of this study was to evaluate the clinical usefulness of static and dynamic variables for the prediction of fluid responsiveness in children under general anaesthesia. METHODS: Thirty-three mechanically ventilated children received 10 ml kg(-1) colloid for 10 min while stable during surgery. Arterial pressure, heart rate, central venous pressure (CVP), and pleth variability index (PVI), in addition to variation in systolic pressure, pulse pressure (including Δdown and Δup), respiratory aortic blood flow velocity (ΔVpeak), and inferior vena cava diameter were measured before and after volume expansion...
April 2013: British Journal of Anaesthesia
Soyhan Bagci, Nicole Müller, Andreas Müller, Andreas Heydweiller, Peter Bartmann, Axel R Franz
PURPOSE: The aim of this pilot study was to evaluate the diagnostic value of pleth variability index (PVI) to predict fluid responsiveness in newborn infants during surgery. METHODS: PVI was continuously recorded in 29 mechanically ventilated newborn infants during surgery, and episodes of clinically indicated volume expansion (VE) (≥10 ml/kg in ≤15 min) administration were evaluated. The upper limit of the reference range for PVI in mechanically ventilated newborns was defined by the 95th percentile of all PVI values from hemodynamically stable infants...
April 2013: Journal of Anesthesia
Giuseppe Latini, Lucia Dipaola, Claudio De Felice
BACKGROUND: The perfusion index (PI), derived from the pulse oximetry signal, has been shown to be an accurate predictor for identifying high illness severity in neonates. The plethysmographic variability index (PVI) is a measure of the dynamic change in PI occurring during a complete respiratory cycle. OBJECTIVES: The aim of this study was to establish the reference range of PVI in spontaneously breathing term newborns. METHODS: PI and PVI values were assessed in 242 term newborns during the first day of life...
2012: Neonatology
J Renner, O Broch, M Gruenewald, J Scheewe, H Francksen, O Jung, M Steinfath, B Bein
This prospective study assessed whether respiratory variations in velocity time integral, peak blood flow velocity and non-invasive pleth variability index are useful measurements in infants undergoing congenital heart surgery and determined threshold values that may help guide fluid administration. In 27 infants receiving mechanical ventilation, of mean (SD) weight 10.4 (6.3) kg, 13 increased their stroke volume index ≥ 15% following a fluid challenge and 14 did not. The best area under the receiver operating characteristic curve was for the echocardiographic-derived variables respiratory variation in blood peak flow velocity (area under the ROC curve = 0...
July 2011: Anaesthesia
E Pereira de Souza Neto, S Grousson, F Duflo, C Ducreux, H Joly, J Convert, C Mottolese, F Dailler, M Cannesson
BACKGROUND: Dynamic variables are accurate predictors of fluid responsiveness in adults undergoing mechanical ventilation. They can be determined using respiratory variation in aortic flow peak velocity (▵Vpeak), arterial pulse pressure [▵PP and pulse pressure variation (PPV)], or plethysmographic waveform amplitude [▵POP and pleth variability index (PVI)]. These indices have not been validated in children. We studied the ability of these variables to predict fluid responsiveness in mechanically ventilated children...
June 2011: British Journal of Anaesthesia
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