Correlation of arterial Pco2 and Petco2 in prehospital controlled ventilation

Belpomme, Vanessa; Ricard-Hibon, A.; Devoir, Cyrille; Dileseigres, Sylvie; Devaud, Marie-Laure; Chollet, C.; Marty, J.

doi:10.1016/j.ajem.2005.04.011

Cited by 61 publications

(55 citation statements)

References 37 publications

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“…Assuming a difference between arterial and mixed-venous PCO 2 , of 2 to 5 mm Hg, we used arterial blood samples collected from a catheter according to routine care in the intensive care unit. 6,11 Roy et al 26 found underestimation of PaCO 2 based on PETCO 2 , up to 4 mm Hg, in patients who received 2 to 6 L of supplemental oxygen per minute by nasal catheter. According to Braz et al, 24 the nasal direction of the flow of additional oxygen is greater for oxygen delivered by nasal catheter than for oxygen delivered by face mask.…”

Section: Discussionmentioning

confidence: 99%

“…6,7 Capnographic measurement of PETCO 2 has been standard care for many years for noninvasive estimation of carbon dioxide (CO 2 ) concentration for some health care facilities, including anesthesia units, 8 emergency departments, 9,10 mobile emergency units, 11,12 and critical care units. 13 Capnometry has been used to confirm the correct placement of endotracheal tubes, 14 to monitor the integrity of mechanical ventilation equipment, 5 and less often to determine the correlation between PaCO 2 and PETCO 2 in spontaneously breathing patients.…”

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confidence: 99%

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Measurement of End-Tidal Carbon Dioxide in Spontaneously Breathing Children After Cardiac Surgery

Rasera

Gewehr

Domingues

et al. 2011

American Journal of Critical Care

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BackgroundRespiratory monitoring is important after surgery to prevent pulmonary complications. End-tidal carbon dioxide (Petco2) measurement by capnometry is an indirect and noninvasive measurement of Pco2 in blood and is accepted and recognized in critical care.ObjectivesTo determine the correlation and level of agreement between Petco2 and Paco2 in spontaneously breathing children after cardiac surgery and to determine whether Petco2 measured by using tidal volume (Vt-Petco2) or vital capacity (VC-Petco2) shows more or less significant correlation with Paco2.MethodsVt-Petco2 and VC-Petco2 by capnometry and Paco2 by blood gas analysis were measured once a day after tracheal extubation. The determination coefficient and degree of bias between the methods were assessed in children with and without supplemental oxygen.ResultsA total of 172 Vt-Petco2, VC-Petco2, and Paco2 values from 48 children were analyzed. The overall coefficients of determination were 0.84 (P < .001) for Vt-Petco2 and Paco2 and 0.62 (P = .02) for VC-Petco2 and Paco2. The mean gradient for Paco2 to Petco2 in all groups increased with the increase in supplemental oxygen; the gradient was significantly larger in the groups given 2 to 5 L of oxygen per minute.ConclusionsIn spontaneously breathing children, Vt-Petco2 provided a more accurate estimate of Paco2 than did VC-Petco2, especially in children given little or no supplemental oxygen. The difference between the methods was significantly larger in the groups given 2 to 5 L of oxygen per minute.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Measurement of End-Tidal Carbon Dioxide in Spontaneously Breathing Children After Cardiac Surgery

Rasera

Gewehr

Domingues

et al. 2011

American Journal of Critical Care

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“…Russel et al [21] found significant correlation between capnography and arterial blood gas measurements. Belpomme et al [22] reported that wide variations in gradients exist between PaCO 2 and PetCO 2 values that depend on patient conditions. They concluded that the PetCO 2 technique is not useful in pre-hospital ventilation management (bias up to 8.6 mm Hg).…”

Section: Discussionmentioning

confidence: 99%

Combined Use of Transcutaneous and End-Tidal Measures of Carbon Dioxide to Predict PCO2 during General Anaesthesia in Adults

Yi¹

2013

J Clin Exp Cardiolog

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“…Its routine use is recommended in every patient with invasive ventilation during anesthesia, 5 although there is low precision in predicting arterial or capillary P CO 2 . [6][7][8] Nevertheless, detecting P ETCO 2 via a face mask is not accurate 9 because of the leakage of the masks and is therefore not recommended during sleep or noninvasive ventilation. 10 This also applies to the measurement of P ETCO 2 via a nasal cannula, which allows a qualitative analysis of ventilation and may be suitable for monitoring during anesthesia 11 but does not allow a reliable qualitative calculation of P aCO 2 .…”

Section: Introductionmentioning

confidence: 99%

Comparison of Transcutaneous and Capillary Measurement of P_CO₂in Hypercapnic Subjects

et al. 2015

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BACKGROUND: Measurement of P CO 2 is vital in determining effective alveolar ventilation. However, obtaining capillary P CO 2 by a skin prick of the earlobe is painful, and nocturnal measurements disturb sleep. End-expiratory measurement of P CO 2 is also well established, but there is a low precision in predicting arterial or capillary CO 2 . The purpose of the study was to evaluate nocturnal measurement of noninvasive, transcutaneous P CO 2 (P tcCO 2 ) measurement in hypercapnic subjects. METHODS: In this prospective study, 31 subjects with chronic hypercapnic failure-in a stable phase of the underlying disease-and a control group of 12 healthy volunteers were included. Transcutaneous measurements were taken by the Tosca sensor (Radiometer, Copenhagen, Denmark) over a period of at least 6 h during the night. A capillary blood gas was measured at midnight and 4:00 am. RESULTS: The mean nocturnal capillary P CO 2 (P capCO 2 ) of subjects was 50.6 ؎ 10.2 mm Hg. In the 31 subjects with known hypercapnic respiratory failure, the correlation between P tcCO 2 and P capCO 2 at midnight was 0.86 and at 4:00 am r ‫؍‬ 0.80. The bias of the hypercapnic subjects was d ‫؍‬ ؉ 4.5 with a limit(s) of agreement of 2 SD ‫؍‬ 13.0. The process of blood sampling caused no significant change in P tcCO 2 . CONCLUSIONS: Our study evaluated transcutaneous capnography as a continuous nocturnal measurement in hypercapnic subjects. We found a good agreement between the methods. Because CO 2 is not constant in patients with respiratory failure, but instead fluctuates, we would recommend the continuous transcutaneous measurement of P CO 2 as our method of choice in the diagnosis of nocturnal hypercapnia.

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Correlation of arterial Pco2 and Petco2 in prehospital controlled ventilation

Cited by 61 publications

References 37 publications

Measurement of End-Tidal Carbon Dioxide in Spontaneously Breathing Children After Cardiac Surgery

Measurement of End-Tidal Carbon Dioxide in Spontaneously Breathing Children After Cardiac Surgery

Combined Use of Transcutaneous and End-Tidal Measures of Carbon Dioxide to Predict PCO2 during General Anaesthesia in Adults

Comparison of Transcutaneous and Capillary Measurement of P_CO₂in Hypercapnic Subjects

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Correlation of arterial Pco2 and Petco2 in prehospital controlled ventilation

Cited by 61 publications

References 37 publications

Measurement of End-Tidal Carbon Dioxide in Spontaneously Breathing Children After Cardiac Surgery

Measurement of End-Tidal Carbon Dioxide in Spontaneously Breathing Children After Cardiac Surgery

Combined Use of Transcutaneous and End-Tidal Measures of Carbon Dioxide to Predict PCO2 during General Anaesthesia in Adults

Comparison of Transcutaneous and Capillary Measurement of PCO2in Hypercapnic Subjects

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Comparison of Transcutaneous and Capillary Measurement of P_CO₂in Hypercapnic Subjects