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Table 4 Discordant results with positive synovial fluid microcalorimetry in patients with negative synovial fluid culture

From: Thermogenic diagnosis of periprosthetic joint infection by microcalorimetry of synovial fluid

Pat. No.

Joint

Class

Synovial fluid leukocyte count (/μl) / granulocytes (%)

Synovial fluid culture

Periprosthetic tissue culturea (No. positive / No. all samples)

Sonication fluid culturea

Periprosthetic tissue histologya

Synovial fluid culture after microcalorimetry

1

Knee

PJI

20,354/69a

Negative

Pseudomonas (3/4)

CNS

Infection

ND

2

Hip

PJI

30,143/99 b

Negative

ND

ND

ND

Positive

3

Hip

PJI

35,910/95 b

Negative

ND

ND

ND

Negative

4

Hip

PJI

2202/72a

Negative

Negative (0/5)

Negative

Wear

Negative

5

Hip

Aseptic

ND

Negative

Negative (0/5)

ND

Wear

Negative

  1. CNS coagulase-negative staphylococci, PJI periprosthetic joint infection, ND not done
  2. a Results from specimen harvested during revision surgery
  3. b Results from preoperative synovial fluid aspiration