Table 3.
Comparison of selected POCT parameters in arterial and venous samples, presented separately for non-HD and HD patients.
| non-HD | A | V | p |
| p50 (mmHg) | 26.89 ± 2.02 | 26.81 ± 1.83 | 0.66 |
| pH | 7.33 ± 0.06 | 7.27 ± 0.07 | <0.01 |
| pCO2 (mmHg) | 34.44 ± 4.98 | 37.06 ± 5.04 | <0.01 |
| HCO3− (mmol/L) | 18.49 ± 3.99 | 17.62 ± 4.02 | <0.01 |
| Anion gap (mmol/L) | 9.78 ± 2.33 | 11.17 ± 2.49 | <0.01 |
| ABE (mmol/L) | −6.62 ± 4.34 | −8.47 ± 4.67 | <0.01 |
| SBE (mmol/L) | −7.37 ± 4.78 | −9.14 ± 5.06 | <0.01 |
| HD | A | V | p |
| p50 (mmHg) | 26.68 ± 1.99 | 27.34 ± 1.84 | <0.01 |
| pH | 7.38 ± 0.05 | 7.32 ± 0.06 | <0.01 |
| pCO2 (mmHg) | 37.06 ± 4.66 | 41.09 ± 4.65 | <0.01 |
| HCO3− (mmol/L) | 22.70 ± 2.95 | 20.68 ± 2.93 | <0.01 |
| Anion gap (mmol/L) | 10.49 ± 2.34 | 12.39 ± 2.37 | <0.01 |
| ABE (mmol/L) | −2.07 ± 3.64 | −4.41 ± 3.79 | <0.01 |
| SBE (mmol/L) | −2.39 ± 4.00 | −4.61 ± 4.07 | <0.01 |
Student’s t-test for dependent variables, p-value < 0.05 statistically significant. Abbreviation: A, arterial sample; V, vein sample; HD, hemodialysis; pCO2, carbon dioxide partial pressure; HCO3−, bicarbonate; SBE, standard base excess; ABE, actual base excess.