Non-invasive continuous fetal transcutaneous pO
 2
 and pCO
 2
 monitoring during labor

Okane, Masato; Shigemitsu, S; Inaba, Junichi; Koresawa, Mitsuhiko; Kubo, Takeshi; Iwasaki, Hiromichi

doi:10.1515/jpme.1989.17.6.399

Cited by 10 publications

(1 citation statement)

References 21 publications

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“…11) sowie zwei dieser Parameter wie pH-Wert und tcpD, ( I), pli -Wert und tcpCD, (\2). tcpD, und tcpCD2(13) oder au ch biochemische Parameter wi e Cytochrom aas (17) im fetalen Gewe be registrierbar sind. Trotz der in den jeweiligen Untersuchungen dargelegten guten Korrelationen zu den im Nabe lsch nurblut unmittelbar post parturn ode r anläßlich einer MBU bestimmten Parame ter haben dies e Verfahren bislang in der klinischen Routine keine nennenswerte Verbreitung gefunden.…”

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Ein neues Verfahren zur kontinuierlichen Messung der fetalen Sauerstoffsättigung sub partu

Knitza

Buschmann²,

Rall³

1992

Geburtsh Frauenheilk

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Ein neues Verfahren zur kontinuierlichen Messung der fetalen Sauerstoffsättigung sub partu

Knitza

Buschmann²,

Rall³

1992

Geburtsh Frauenheilk

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CO₂Electrodes

Severinghaus

2006

Encyclopedia of Medical Devices and Instrumentation

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The CO 2 electrode is a membrane covered glass pH electrode with an internal electrolyte film containing NaCl and NaHCO 3 . The electrical output is a log function of p CO 2 (partial pressure) exposed to the sensor face. At 37°C, output is 60 mV for a 10‐fold change in p CO 2 . The CO 2 electrode was invented by Richard Stow, Ph.D. at Ohio State University Hospital in 1954 to help with management of paralyzed polio victims who were being artificially ventilated. His original device failed because his internal electrolyte was distilled water. Severinghaus added bicarbonate and salt to stabilize it. Manufacture of the device began in 1959. Transcutaneous (tc) CO 2 electrodes were introduced in the mid‐1970s when transcutaneous O 2 electrodes were found to adequately reflect arterial blood oxygen pressure ( p aO 2 ), especially in premature infants whose immature lungs required extra oxygen, but where too much oxygen caused blindness. The tc p CO 2 electrodes are combined with tc p O 2 electrodes in a single small sensor that is attached with adhesive to skin surfaces. These devices are internally heated to increase local skin blood flow. At 43–45°C, skin surface p O 2 resembles (arterial) p aO 2 , but skin surface tc p CO 2 is ∼ 1.4 times higher than p aCO 2 . The instrument is calibrated to correct this difference. Transcutaneous oxygen and carbon dioxide electrodes have found many uses in addition to their use for newborn infants. However, their usefulness fell after pulse oximetry became common in 1985. The electrodes need careful maintenance with membrane changes and limitation of time on a skin location, to avoid burns.

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Medical and Healthcare Sensors

Owen¹

1995

Sensors Set

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Non-invasive continuous fetal transcutaneous pO₂ and pCO₂ monitoring during labor

Cited by 10 publications

References 21 publications

Ein neues Verfahren zur kontinuierlichen Messung der fetalen Sauerstoffsättigung sub partu

Ein neues Verfahren zur kontinuierlichen Messung der fetalen Sauerstoffsättigung sub partu

CO₂Electrodes

Medical and Healthcare Sensors

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Non-invasive continuous fetal transcutaneous pO 2 and pCO 2 monitoring during labor

Cited by 10 publications

References 21 publications

Ein neues Verfahren zur kontinuierlichen Messung der fetalen Sauerstoffsättigung sub partu

Ein neues Verfahren zur kontinuierlichen Messung der fetalen Sauerstoffsättigung sub partu

CO2Electrodes

Medical and Healthcare Sensors

Contact Info

Product

Resources

About

Non-invasive continuous fetal transcutaneous pO₂ and pCO₂ monitoring during labor

CO₂Electrodes