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Photoplethysmography: a futuristic view for neonatal care

Non-invasive monitoring techniques have gained wide application during critical care of the newborn infant. These techniques include transcutaneous PO 2 and PCO2 and arterial oxygen saturation using pulse oximetry. The limitations of pulse oximetry for use in the newborn are well recognized (1) and initially there was a great deal of scepticism from neonatologists because of the risk of failing to detect significant hyperoxia. Despite these limitations, this technology is now used almost universally in this patient group, and certainly much more than the transcutaneous methods (2). This is because pulse oximeters are easy to apply and provide information to the clinician rapidly with minimal discomfort to the baby. Therefore, any improvements in this technology in terms of increased reliability or scope are likely to be welcomed by clinicians. The paper by Olsson et al. (3) features the use of photoplethysmography (PPG) in the determination of heart rate and respiratory rate in the newborn infant.