Evaluation of a new combined SpO₂/PtcCO₂ sensor in anaesthetized paediatric patients

Abstract

In anaesthetized children, the TOSCA ear sensor allows estimation of SaO2 and PaCO2, comparable in accuracy to endtidal capnometry and finger pulse oximetry. This makes the TOSCA monitor a helpful add-on to respiratory monitoring in anaesthetized children, in situations, in which endtidal capnometry is unreliable or difficult to establish.

The Revised Digital Transcutaneous PCO2/SpO2 Ear Sensor Is a Reliable Noninvasive Monitoring Tool in Patients After Cardiac Surgery

“…Rohling and coworkers [25] reported excellent agreement of transcutaneously measured SpO 2 using the TOSCA device and SaO 2 in anaesthetized adult patients. Similar results were found in anaesthetized pediatric patients by Dullenkopf and co-workers [26] with a mean bias and limits of agreement of -0.63% and -3.4 / +2.1% respectively. In patients assessed for longterm oxygen therapy, Schafroth Török and colleagues [20] recently confirmed these results using a previous version of the V-Sign TM 2 sensor.…”

Clinical Validation of a Digital Transcutaneous PCO2/SpO2 Ear Sensor in Adult Patients after Cardiac Surgery

“…Rohling and Biro [15] investigated the Kontron device (Kontron Monitor 7840 Kontron Instruments Medical Sensors, Basel, Switzerland) in anaesthetized adult patients and found good agreement between PtcCO 2 and PaCO 2 (mean bias )0.08 kPa; limits of agreement )0.38/ +0.22 kPa), and SpO 2 values differed less than 1% from those obtained by standard pulse oximetry. Dullenkopf et al [10] and Bernet-Buettiker et al [9] validated the TOSCA system (Linde Medical Sensors, Basel, Switzerland) in children and neonates, respectively. Both authors reported a good agreement between PtcCO 2 and PaCO 2 , although their reported bias values differed significantly ()0.04 and +0.44, respectively).…”

“…However, sensor preparation, positioning, taping, and the necessity for repeated changes of the sensorÕs location made handling difficult and complicated its use [9]. More recently, two new devices, the SenTec Digital Monitor V-sign sensor and the TOSCA devise, for combined assessment of PtcCO 2 and SpO 2 using a single ear-clip sensor were introduced [9][10][11][12]. To the best of our knowledge, only three studies assessing the accuracy and reliability of the V-Sign sensor (V-Sign Sensor, SenTec Digital Monitoring System: SenTec AG, Therwil, Switzerland) have so far been published: one in adult volunteers [11], one in patients during bronchoscopy [12], and one in critically ill patients in a medical intensive care unit (ICU) [13].…”

Evaluation of a New Combined Transcutaneous Measurement of Pco2/Pulse Oximetry Oxygen Saturation Ear Sensor in Newborn Patients

“…According to the manufacturer, the sensor has to be changed between the left and the right ear lobe only twice a day, because the skin is warmed only to 42°C as opposed to 44°C in other sensors and only low pressure is applied to the ear lobe. Technical details and function are described in detail by Eberhard et al 4 and Dullenkopf et al 5 The sensor was modified in cooperation with the manufacturer for its use on the thin ear lobe of neonates with a Varihesive layer (Conva Tec, Princeton, NJ) on the reflecting side (Fig 1). This modification was necessary to compensate for the gap of 3 mm between the flanges of the clip, which was too large for the thin ear lobes of neonates.…”

“…4,5 So far, no data are available about suitability and reliability of the monitor in newborn infants. Thus, the aim of the present study was to evaluate the performance and reliability of the Spo 2 and Ptcco 2 reading of this monitor in newborns.…”