Table 1.
Pre-, intra-, and postoperative factors of deep infection in tumor endoprostheses
| Preoperative | |
|---|---|
| Age (years) | |
| Range |
9–86 |
| Mean |
34.7 |
| Median |
24 |
| Sex | |
| Male |
32 |
| Female |
25 |
| Comorbidity as infectious risk | |
| Yes |
7 |
| No |
50 |
| Tumor origin | |
| Primary |
51 |
| Metastatic |
6 |
| Location | |
| Distal femur |
34 |
| Proximal tibia |
23 |
| Grade | |
| Low |
13 |
| High |
38 |
| Extracompartmental tumor extension | |
| Yes |
47 |
| No |
10 |
| Chemotherapy |
38 |
| Radiotherapy |
8 |
| Intraoperative extraarticular resection |
13 |
| Bone resection length (cm) | |
| Range |
10–26 |
| Mean |
15.2 |
| Median |
14 |
| Number of antibiotics | |
| Single |
27 |
| Two |
30 |
| Duration of operation (min) | |
| Range |
170–1440 |
| Mean |
376 |
| Median |
305 |
| Intraoperative blood loss (mL) | |
| Range |
90–10500 |
| Mean |
977.7 |
| Median |
585 |
| Extent of partial resection of the quadriceps muscle (femur cases) | |
| Mean |
1.8 |
| Median |
2 |
| Muscle flap for anterior aspect of the tibia (tibia cases) | |
| Yes |
18 |
| No |
5 |
| Postoperative | |
| Bad skin condition |
20 |
| Surface infection |
9 |
| Time from surgery until infection (months) | |
| Range |
0–85 |
| Mean |
13 |
| Median |
4 |
| Loosening |
5 |
| Discharge/pus at infection presentation |
32 |
| Body temperature at infection presentation (°C) | |
| Range |
35.8–40.6 |
| Mean |
38.3 |
| Median |
38.5 |
| C-reactive protein value at infection presentation (mg/dL) | |
| Range |
0.2–45.1 |
| Mean |
11.4 |
| Median |
9.0 |
| Microbial culture | |
|
Staphylococcus aureus |
27 |
| Methicillin-resistant S. aureus |
10 |
| Staphylococcus epidermidis | 10 |