The Pattern of Procalcitonin in Primary Total Hip and Knee Arthroplasty and its Implication in Periprosthetic Infection
Bibliographic record
Abstract
BACKGROUND: The serum marker Procalcitonin (PCT) has been shown to be a sensitive indicator of bacterial infection, but very little is known of its behavior in periprosthetic infection. In this study, PCT was compared with standard tests used to aid the diagnosis of infection. As a baseline, its pattern in uncomplicated hip and knee arthroplasty was investigated. METHODS: A prospective study of fifty-nine patients had bloods taken preoperatively, and on days 1, 3, 5, for PCT, C- reactive protein, erythrocyte sedimentation rate and white cell count. RESULTS: Fifty patients (85%) had normal PCT values (< 0.5 ng/ml) and only 5 recorded a value > 1.0ng/ml. On day 5 only 1 patient had a value > 0.5ng/ml. The standard tests all showed sporadic elevations over the 3 days. PCT levels are not significantly elevated by the trauma of this surgery, as they are in other surgical procedures. CONCLUSIONS: PCT may be very useful in patients with suspected periprosthetic infection. KEYWORDS: Infection; Periprosthetic; Procalcitonin; C-reactive protein; Arthroplasty.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.003 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".