In-vitro evaluation of the PediaSat continuous central venous oxygenation monitoring system

Baulig, Werner; Spielmann, Nelly; Zaiter, Hassan; Lijovic, Tomislav; Béttex, Dominique; Bürki, Christoph; Weiß, Markus

doi:10.1097/eja.0b013e3283352201

Cited by 8 publications

(4 citation statements)

References 18 publications

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“…The oximetric probe consisted of two optical fibers with a small gap between their tips ( Figure 2 ), which was introduced into the vein. One of the fibers transmits two-wavelengths of light into the blood in the gap between the optical fibers and the second fiber guides the transmitted light to the detector [ 17 , 29 , 30 ].…”

Section: Non-pulsatile Oximetric Techniquesmentioning

confidence: 99%

“…The SvO 2 value was calculated from the values of the transmitted light in two or three wavelengths by using the modified Beer–Lambert law [ 17 , 30 ]. Like the Millikan’s oximeter, the intravenous oximeter needs calibration in a blood sample before each continuous examination , according to the manufacturer’s instructions, using blood gases analysis.…”

Section: Non-pulsatile Oximetric Techniquesmentioning

confidence: 99%

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The Various Oximetric Techniques Used for the Evaluation of Blood Oxygenation

Nitzan

Arieli

2020

Sensors

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Adequate oxygen delivery to a tissue depends on sufficient oxygen content in arterial blood and blood flow to the tissue. Oximetry is a technique for the assessment of blood oxygenation by measurements of light transmission through the blood, which is based on the different absorption spectra of oxygenated and deoxygenated hemoglobin. Oxygen saturation in arterial blood provides information on the adequacy of respiration and is routinely measured in clinical settings, utilizing pulse oximetry. Oxygen saturation, in venous blood (SvO2) and in the entire blood in a tissue (StO2), is related to the blood supply to the tissue, and several oximetric techniques have been developed for their assessment. SvO2 can be measured non-invasively in the fingers, making use of modified pulse oximetry, and in the retina, using the modified Beer–Lambert Law. StO2 is measured in peripheral muscle and cerebral tissue by means of various modes of near infrared spectroscopy (NIRS), utilizing the relative transparency of infrared light in muscle and cerebral tissue. The primary problem of oximetry is the discrimination between absorption by hemoglobin and scattering by tissue elements in the attenuation measurement, and the various techniques developed for isolating the absorption effect are presented in the current review, with their limitations.

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Section: Non-pulsatile Oximetric Techniquesmentioning

confidence: 99%

Section: Non-pulsatile Oximetric Techniquesmentioning

confidence: 99%

The Various Oximetric Techniques Used for the Evaluation of Blood Oxygenation

Nitzan

Arieli

2020

Sensors

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“…There is, however, no evidence that the availability of these devices alters outcomes in pediatric anesthesia, and studies validating the use of these methods in a variety of clinical situations are needed before they will be widely used in pediatric practice (41–44).…”

Section: Monitoringmentioning

confidence: 99%

Equipment and monitoring – what is in the future to improve safety?

Campbell

Wilson

Engelhardt

2011

Pediatric Anesthesia

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Summary There have been a number of recent developments in the practice of anesthesia and intensive care aimed at improving outcome in terms of reducing both morbidity and mortality, as well as other less‐defined factors, such as quality of service provision. Significant advances have been made in airway devices such as pediatric tracheal tube designs, Microcuff® tracheal tubes, and new laryngoscopes. Noninvasive monitoring devices, including continuous hemoglobin analysis and near infrared spectrometry, are being increasingly used in pediatric anesthesia. Other, ‘scaled‐down’ versions from adult anesthesia care, however, have not universally been shown to result in improved safety and outcomes in pediatric anesthesia.

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“…Además, con éste catéter es posible obtener por la técnica de termodilución, el cálculo de volumen minuto. A su vez, mediante catéteres modernos con incorporación de fibra óptica también es posible realizar estas mediciones (Baele et al 1982, Sumimoto et al 1991, Baulig et al 2008 Frente al aumento de la extracción de oxígeno (O2ER), interviene fundamentalmente el mecanismo fisiológico de reclutamiento vascular, que extienden el área de intercambio gaseoso en la microcirculación y disminuyen las distancias para la difusión del oxígeno, desde los capilares a la mitocondria (Cain et al 1983). Los rangos teóricos de DO2 y VO2 en el humano, son 400-550 y 120-160 ml/min/m2 respectivamente.…”

Section: Función Pulmonarunclassified

Puente cardiopulmonar con hipotermia moderada y estasis circulatorio en ovinos de experimentación

Marcos¹

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La presente Tesis se enfocó en desarrollar una técnica híbrida con aplicabilidad en Medicina Veterinaria, basada en los conocimientos antiguos y actuales sobre cirugía cardíaca y circulación extracorpórea. Para ello se utilizó un sistema de circulación extracorpórea sin oxigenador de membrana junto a la inducción de hipotermia moderada en dos grupos de ovinos (GI: tórax cerrado) y (GII: tórax abierto y arresto circulatorio). Los principales objetivos fueron: reducir a 25°C la temperatura corporal de los animales utilizando este sistema, evaluar el efecto de la circulación extracorpórea sobre la función pulmonar y determinar la correlación entre hipotermia y oxigenación. En el grupo I se utilizó un bypass venoso arterial (femoro-femoral), para inducir la hipotermia y el recalentamiento. En el grupo II se utilizó un bypass desde aurícula izquierda a la arteria femoral. En este grupo al alcanzar los 25°C se realizó arresto cardíaco mediante la administración de solución cardioplégica. Luego de 12 minutos de estasis circulatorio se reanudó el flujo del bypass y el recalentamiento de los animales. En ambos grupos fue posible conducir a temperaturas de 25°C sin evidenciar arritmias y con valores hemodinámicos adecuados. Pudo evidenciarse los efectos de la hipotermia sobre la compresión de los gases en sangre. En el grupo II, la reperfusión se asoció a mayor alteración en la difusión de los gases, aunque en ambos grupos la saturación de oxihemoglobina fue superior al 98% durante toda la experiencia. La presente técnica es factible de aplicarse para realizar reparaciones intracardíacas en animales de compañía, exigiendo un detallado manejo ácido-base y ventilatorio de los animales. No obstante es adecuado un siguiente estudio para la optimización de la misma junto a la evaluación de drogas neuroprotectoras que permitan extender el tiempo de isquemia en el período de estasis circulatorio.

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In-vitro evaluation of the PediaSat continuous central venous oxygenation monitoring system

Abstract: The current version of the PediaSat system does not reliably reflect S CO-OX O2 values below 70%, but it seems to be a useful tool providing an accurate trend of continuous central venous oxygen saturation.

Cited by 8 publications

References 18 publications

The Various Oximetric Techniques Used for the Evaluation of Blood Oxygenation

The Various Oximetric Techniques Used for the Evaluation of Blood Oxygenation

Equipment and monitoring – what is in the future to improve safety?

Puente cardiopulmonar con hipotermia moderada y estasis circulatorio en ovinos de experimentación

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