Table 3.
Profile of positive or negative samples in prosthetic joint infections and in aseptic loosening
| Profile of sample | Number of acute infections (%) | Number of chronic infections (%) | Total (%) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| SF | PT | S | Hip | Knee | Total | Hip | Knee | Total | |
| P | P | P | 6 (54.4) | 32 (86.5) | 38 (79.2) | 5 (22.7) | 10 (58.8) | 15 (38.5) | 53 (60.9) |
| P | P | N | 2 (18.2) | 1 (2.7) | 3 (6.2) | 9 (41) | 1(5.9) | 10 (25.6) | 13 (14.9) |
| P | N | N | 3 (27.3) | 0 | 3 (6.2) | 3 (13.6) | 2 (11.8) | 5 (12.8) | 8 (9.2) |
| N | N | N | 0 | 0 | 0 | 2 (9.1) | 1 (5.9) | 3 (7.7) | 3 (3.4) |
| N | N | P | 0 | 1 (2.7) | 1 (2.1) | 0 | 0 | 0 | 1 (1.1) |
| N | P | P | 0 | 1 (2.7) | 1 (2.1) | 0 | 0 | 0 | 1 (1.1) |
| N | P | N | 0 | 0 | 0 | 2 (9.1) | 2 (11.8) | 4 (10.2) | 4 (4.6) |
| P | N | P | 0 | 2 (5.4) | 2 (4.2) | 1 (4.5) | 1 (5.9) | 2 (5.1) | 4 (4.6) |
| Total | 11 | 37 | 48 | 22 | 17 | 39 | 87 | ||
| Profile of sample | Number of aseptic loosenings (%) | ||||
|---|---|---|---|---|---|
| SF | PT | S | Hip | Knee | Total |
| P | P | P | 0 | 0 | 0 |
| P | P | N | 0 | 0 | 0 |
| P | N | N | 0 | 0 | 0 |
| N | N | N | 22 (75.86) | 19 (55.88) | 41 (65.07) |
| N | N | P | 1 (3.44) | 0 | 1 (1.5) |
| N | P | P | 0 | 0 | 0 |
| N | P | N | 6 (20.68) | 15 (44.11) | 21 (33.33) |
| P | N | P | 0 | 0 | 0 |
| Total | 29 | 34 | 63 | ||
SF = synovial fluid; PT = periprosthetic tissue; S = swab; P = culture-positive; N = culture-negative; HPJI = hip prosthetic joint infection; KPJI = knee prosthetic joint infection.