Blood gas data before and after cement injection
| Before Injection | N | 10 Min | N | 30 Min | N | 60 Min | N | |
|---|---|---|---|---|---|---|---|---|
| pH | ||||||||
| PMMA | 7.41 ± 0.03 | 5 | 7.40 ± 0.08 | 5 | 7.41 ± 0.08 | 5 | 7.41 ± 0.08 | 5 |
| 7.36–7.45 | 7.29–7.50 | 7.31–7.51 | 7.31–7.51 | |||||
| PMMA & HA | 7.47 ± 0.09 | 5 | 7.38 ± 0.11 | 6 | 7.40 ± 0.10 | 6 | 7.41 ± 0.10 | 6 |
| 7.35–7.58 | 7.27–7.49 | 7.30–7.51 | 7.31–7.51 | |||||
| Pco2 (mm Hg) | ||||||||
| PMMA | 42.9 ± 6.3 | 5 | 44.8 ± 5.9 | 5 | 43.6 ± 6.5 | 5 | 43.0 ± 6.5 | 5 |
| 35.0–50.8 | 37.5–52.2 | 35.5–51.7 | 34.9–51.1 | |||||
| PMMA & HA | 35.7 ± 7.4 | 5 | 48.0 ± 12.7 | 6 | 46.0 ± 12.7 | 6 | 44.5 ± 10.5 | 6 |
| 26.4–44.9 | 34.6–61.3 | 32.6–59.3 | 33.5–55.5 | |||||
| Po2 (mm Hg) | ||||||||
| PMMA | 509 ± 60 | 5 | 361 ± 175 | 5 | 453 ± 75 | 5 | 461 ± 66 | 5 |
| 435–583 | 144–579 | 360–547 | 378–543 | |||||
| PMMA & HA | 504 ± 33 | 5 | 328 ± 163 | 6 | 342 ± 145 | 6 | 377 ± 121 | 6 |
| 462–545 | 158–499 | 190–494 | 251–504 |
Note:—PMMA indicates polymethylmethacrylate; HA, hydroxyapatite; Po2, partial pressure of oxygen; Pco2, partial pressure of carbon dioxide. The values are given as mean ± SD and as 95% confidence intervals on the line below.