Accuracy of capnography with a 30 foot nasal cannula for monitoring respiratory rate and end-tidal CO2 in children.
We tested the accuracy of a low flow (50 cc/min) sidestream capnography system equipped with an experimental 30-foot nasal cannula to monitor ventilatory status in children. End-tidal CO2 and respiratory rate, both at room air and in the presence of supplemental oxygen, were recorded simultaneously from the experimental 30-foot nasal cannula and the standard, FDA approved, 10-foot nasal cannula. The 30-foot nasal cannula was as accurate as the 10-foot nasal cannula in measuring respiratory rate and end-tidal CO2 in children. When supplemental oxygen was delivered by face-mask, there was no dilutional effect on the respiratory rate or end-tidal CO2 recorded with either the 10-foot or 30-foot nasal cannulas in place.
Mason
K P
KP
Department of Anesthesiology, Children's Hospital and Harvard Medical School, Boston, MA 02115, USA. Mason_k@a1.tch.harvard.edu
Burrows
P E
PE
Dorsey
M M
MM
Zurakowski
D
D
Krauss
B
B
D000293:Adolescent; D019296:Capnography / Q000295:instrumentation* / Q000379:methods*; D002404:Catheterization; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008991:Monitoring, Physiologic; D009296:Nasal Cavity; D010372:Pediatrics; D012123:Pulmonary Ventilation; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity