Evaluation of RAMP Troponin I Point of Care Assay
Bibliographic record
Abstract
Rapid troponin testing has become a prerequisite for adequate and timely management of chest pain patients. In that respect, quantitative point of care testing (POCT) devices, if reliable, would offer the benefit of greatly reduced turnaround time (TAT) as compared with centralized testing. Thus, we performed short analytical evaluation of the TnI method on RAMP POCT device (Rapid Analysis Measurement Platform, RAMP Corp, Burnaby, Canada). It is a fluorescence immunochromatography quantitative method that utilizes diluted whole blood. Results are available after 19 minutes. The analytical sensitivity of the system is shown to be 0.16 ng/ml, which makes it inadequate for risk stratification purposes. Reproducibility at 1.18 ng/ml was 7.3%, which is satisfactory and comparable to laboratory methods. The patients' results were compared with Dimension RxL (Dade Behring, Deerfield, IL) fully automated EIA method (N = 50). The correlation coefficient for the whole patient series was acceptable (0.977); however, it became much less favorable (0.682) when values above 6 ng/ml were excluded. Linear regression equation (y = 0.2871x + 0.0986) pointed out the consistently lower values obtained by RAMP method. The bias was on the average three-fold and thus statistically significant. This raises particular concern for the patients in the early stages of AMI with minor troponin elevations. Although obtained on a small patient series, our results point out that RAMP AMI cut-off should be chosen carefully to avoid false negatives. The 0.3 ng/ml cut-off suggested by the manufacturer may still be too high.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.003 | 0.009 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".