PubMed · 12562423
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S M White. 2003. Another use for capnography.. https://pubmed.ncbi.nlm.nih.gov/12562423/
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End-tidal carbon dioxide pressure (PetCO(2)) was measured in the neonatal intensive care unit (NICU) to assess its reliability and accuracy in predicting arterial partial pressure of carbon dioxide (PaCO(2)). Arterial blood was drawn for gas analysis and compared with exhaled CO(2) measured by mainstream capnography. In total, 130 PetCO(2)/PaCO(2) comparisons were obtained from 61 patients (20 term and 41 preterm infants). PetCO(2) was significantly different from PaCO(2) (PetCO(2) = 42.3 +/- 10.5 mmHg vs. PaCO(2) = 45.8 +/- 12.3 mmHg, P < 0.001, mean +/- SD). The overall PetCO(2) bias (mean +/- SD) was 3.5 +/- 7.1 mmHg. There was a positive correlation between PetCO(2) and PaCO(2) (n = 130, r = 0.818, P < 0.001) in both term (n = 44, r = 0.779, P < 0.001) and preterm infants (n = 86, r = 0.849, P < 0.001). The PetCO(2) biases (95% CI) were 3.5 +/- 9.0 mmHg (0.8-6.2) in the term group and 3.4 +/- 6.0 mmHg (2.2-4.7) in the preterm group. Therefore, PetCO(2) was a valid and reliable method for monitoring PaCO(2) in neonates, especially preterm infants. This method decreases blood loss and prevents complications associated with arterial catheters. In conclusion, we recommend using mainstream capnography to monitor PetCO(2) instead of measuring PaCO(2) in the NICU.
Surgery for emphysema is considered as one of the most challenging procedure for anaesthesiologist. Because of the critical illness of such patient, perioperative monitoring is important. Ventilatory monitoring is often difficult or impossible due to a possible massive air leak during the procedure. This case described how ETCO2 was assessed by capnography monitoring on the chest tube drainage.
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