Chest
Original ResearchMonitoring During Oxygen TherapyCombined Oximetry-Cutaneous Capnography in Patients Assessed for Long-term Oxygen Therapy
Section snippets
Materials and Methods
The data of 20 patients attending the lung function laboratory of the Clinic of Pulmonary Medicine at the University Hospital Basel for assessment of home oxygen therapy with oxygen titration were analyzed. The cutaneous measurement of oxygen saturation and carbon-dioxide tension was performed with a combined oximetry/capnography sensor (Sentec AG; Therwil, Switzerland). This sensor is a digital sensor that combines the elements of an electrochemical Severinghaus-type Ptcco2 sensor with those
Results
The mean age of the 11 female and 9 male patients was 69.7±10.4 years. Most patients (15 of 20 patients) had COPD, which was associated with pulmonary hypertension in 8 patients. Other diagnoses included restrictive ventilation disorders due to sarcoidosis, lung resection for infection or carcinoma, and idiopathic or secondary pulmonary hypertension. The mean FEV1 of the 20 patients was 36.2±15.8% predicted, and the mean FVC was 55.6±19.6% predicted. Individual lung function and arterial blood
Discussion
The findings of the present study show that the monitoring of Ptcco2 and Spo2 with an ear-lobe sensor during assessment for long-term oxygen therapy is feasible and that there is a good agreement with Paco2 and Sao2; bias and precision in the current study were within a reasonable range for clinical use. Our data correlate well with those of several other studies9, 12, 16, 17, 18 comparing Ptcco2 and Spo2 with arterial blood gas values in different clinical settings and with different devices.
Acknowledgment
The authors thank Sentec AG (Therwil, Switzerland) for providing the combined cutaneous carbon dioxide and oximetry monitoring system.
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Dr. Chhajed is on the medical advisory board of Sentec AG. Drs. Török, Leuppi, Baty, and Tamm have reported to the ACCP that no significant conflicts of interest exist with any companies/organizations whose products or services may be discussed in this article.