FIGURE 1.
Consort chart of the study. Thet diagram shows the flow of participants through each stage of a randomized trial.
PCA = patient-controlled analgesia; PCEA = patient-controlled epidural analgesia
TABLE 1.
General patients’ and procedure characteristics
| Group 1 (PCA) | Group 2 (tramadol-metamizole) | Group 3 (PCEA) | Group 4 (PCA and lidocaine) | p | |
|---|---|---|---|---|---|
| Age (years) | 59 | 65 | 60 | 59 | 0,394 |
| Weight (kg) | 76 | 75 | 79 | 76 | 0,833 |
| Wound length (cm) | 6,55 | 7,17 | 7,45 | 7,90 | 0,286 |
| Duration of surgery (min) | 139 | 133 | 117 | 112 | 0,024 |
| Duration of hospitalization (days) | 8 | 9 | 8 | 10 | 0,380 |
| Day of first defecation | 4 | 4 | 5 | 4 | 0,571 |
FIGURE 2.
Piritramide consumption on day of surgery (day 0).
FIGURE 3.
Piritramide consumption on first postoperative day (day 1).
PCA = patient-controlled analgesia; PCEA = patient-controlled epidural analgesia
FIGURE 4.
Piritramide consumption on second postoperative day (day 2).
PCA = patient-controlled analgesia; PCEA = patient-controlled epidural analgesia
TABLE 2.
Comparison of piritramide consumption between the group pairs
| Comparison | P value (day 0) | P value (day 1) | P value (day 2) | |
|---|---|---|---|---|
| PCA | PCEA | 0.938 | < 0.001 | < 0.001 |
| PCA | tramadol-metamizole | 0.083 | < 0.001 | < 0.001 |
| PCA | PCA + lidocaine | 0.995 | 0.003 | 0.026 |
| PCEA | tramadol-metamizole | 0.008 | 0.352 | 0.038 |
| PCEA | PCA + lidocaine | 0.862 | < 0.001 | < 0.001 |
| PCA + lidocaine | tramadol-metamizole | 0.030 | < 0.001 | < 0.001 |