• Resuscitation · Oct 1993

    Comparative Study

    End-tidal CO2 and plasma lactate level: a comparison of their use as parameters for evaluating successful CPR.

    • S Sato, T Kimura, N Okubo, T Naganuma, and M Tanaka.
    • Department of Anesthesiology, University of Tsukuba, Ibaraki-ken, Japan.
    • Resuscitation. 1993 Oct 1; 26 (2): 133-9.

    AbstractSerial changes of end-tidal CO2 (ETCO2) and plasma lactate levels during CPR have been described as useful to investigate or evaluate the results of CPR. However, there have been no reports comparing these parameters in the same model. By inducing cardiopulmonary arrest (2-7 min) in 28 Wistar rats, ETCO2 and serum lactate levels were studied after and just before CPR, respectively. In the survived group (N = 16), ETCO2 was maintained in high levels (20.1-16.3 mmHg), however in the non-survived group (N = 12), ETCO2 showed an abrupt decline (6.0-2.0 mmHg). The lactate levels before CPR in two groups were significantly higher than those of control levels, however there was no significant difference just before the CPR between the two groups. ETCO2 during CPR is a useful indicator for determining the successful application of CPR. However, serum lactate levels sampled just before the onset of CPR did not prove to be a useful indicator of successful CPR in rats.

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