The correlation between Capillary Blood Gas Test (CBGT) vs Arterial Blood Gas Test (ABGT) has been previously reported as adequate in pediatric patients and anecdotic reports in adult. To our knowledge, this correlation has not been established in controlled studies of patients with stable cardiopulmonary diseases.
We studied 40 patients with known cardiopulmonary disease in the pulmonary function test lab. Demographic information was recorded from each patient. A modified Allen maneuver and capillary refill status was evaluated. After that, CBGT and ABGT were obtained from the non-dominant extremity with Inspired Oxygen Fraction of 21% (FiO2) and after 20 minutes of breathing oxygen with FiO2 of 100%. For each gasometric parameter (pH, PCO2, PO2, HCO3, TCO2, BE and SaO2) Pearson correlation test (r) was used, the values are shown as mean ± SD. The level of significance was established at p< 0.05.
We included 17 male and 23 female patients, with ages of 54 ± 18. There were no incidents in the sampling. 160 simultaneous paired samples were obtained, 80 from the radial artery and 80 from the capillary bed of the distal phalanx. The pathologic conditions included were various Heart Disease (n= 28), and Lung Diseases (n= 12). The correlations obtained were:.
Correlations are good, although, not as good as we expected.
Capillary sampling could be a plausible and less invasive alternative for blood gas testing. CBGT vs ABGTr / 21%P<r /100%P<PH.888.000.888.000PCO2.766.000.891.000PO2.769.000.733.000HCO3.669.000.833.000TCO2.670.000.840.000BE.589.000.829.000SaO2.855.000.984.000
L.E. Santos-Martinez, None.