Performance of a digital PCO2/SPO2 ear sensor
| Autor: | Andres Tschupp, Roman Rohling, Serge Kocher |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Adult
Male Health Informatics Critical Care and Intensive Care Medicine Sensitivity and Specificity pCO2 law.invention Fingers Hypocapnia law Intensive care Medicine Humans Oximetry Hypoxia Signal processing medicine.diagnostic_test Pulse (signal processing) business.industry Respiration Ear Signal Processing Computer-Assisted Carbon Dioxide medicine.disease Analog ear Oxygen Pulse oximetry Anesthesiology and Pain Medicine Equipment and Supplies Anesthesia Ventilation (architecture) Female business Algorithms Biomedical engineering |
| Zdroj: | Journal of clinical monitoring and computing. 18(2) |
| ISSN: | 1387-1307 |
| Popis: | Objective.For determining the adequacy of ventilation, conventional pulse oximetry should be amended by PaCO2 (= arterial carbon dioxide partial pressure). This study investigates the precision of carbon dioxide measurements of the first digitalear-clip sensor providing continuous non-invasive monitoring of PaCO2, SpO2 (= functional arterial oxygen saturation as estimated with a pulse oximeter) and pulse rate and compares it to two conventional analog oximeters. Methods.30 hypoxemia episodes in 6 adult volunteers were investigated in a standardized protocol. Equipment: Masimo™ analog finger sensor, Nellcor™ analog ear sensor, SenTec™ digital ear sensor. Results.The difference between PCO2 data (= PaCO2 estimated from the measured PcCO2 based on an algorithm by Severinghaus) (PcCO2 = cutaneous carbon dioxide pressure) and the PaCO2 is clinically unimportant. Therefore, we suggest, the two methods of estimating patient's carbon dioxide status can be used interchangeably. Conclusions.Combined digital SpO2/PcCO2 ear sensors are very promising to allow for a fast and reliable monitoring of patient's oxygenation, hyper-/hypocapnia and ventilation with one single non-invasive probe. Optimal primary signal processing – amplification and digitalisation within the probe – allow for fast and reliable downstream signal processing algorithms. The resulting short SpO2 response times give the medical staff more time to take appropriate actions. |
| Databáze: | OpenAIRE |
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