Bibliographic record
Abstract
10 cases of pneumonia causing cardiac arrest and non-perfused brain occurred at ages 40 days-30 months, in a medico-legal setting. In each deceased child, both the pneumonia and non-perfused brain were verified histologically. Upper respiratory infection and mouth-breathing accompanied the pneumonia, with ongoing choking on formula or food in three cases, and vomiting in an additional five cases. In eight of the 10 cases, the pre-terminal event was a quiet respiratory arrest while sleeping, or being carried in the arms. Adrenaline was given up to 7 times during CPR lasting 44±32 minutes, with up to 2 hours CPR and fall in body temp to <32°C. Mean survival was 1.9±1.5 days and heparin was given for organ donation in 3 cases. The lungs showed chronic interstitial pneumonia as described by Katzenstein, with superadded acute bronchiolo-alveolar infiltrates in two cases of aspiration. The court permitted recuts and cellular characterization of the interstitial cells in one case, revealing the infiltrate was ~40% histiocytes, 5% T or B cells, and ~50% vimentin+ mesenchymal cells. All brains showed features of non-perfused brain and retino-dural hemorrhage. The observed features of non-perfused brain were blurring of the gray-white junction, edema, gross friability, histologic pallor, closure of the microcirculation, patchy acidophilic neurons and recent demarcated pan-necrosis, and pituitary infarction in one patient where hypophysis was sampled. Normally, from birth to 30 months, cerebral blood flow increases to 55% of cardiac output, accompanying physical brain growth. Restoration of high cardiac output using adrenaline-CPR means that on resuscitation, re-routing of blood that can no longer go through the non-perfused brain detours through dura, face, scalp, eyes and optic nerve sheaths. The diversion of blood around non-perfused brain results in facial bruising and retino-dural hemorrhage that can be misinterpreted as head trauma, and a common inference of child abuse in the courts. In the present series from Australia, Canada and the USA, outcomes ranged from acquittal to life imprisonment. LEARNING OBJECTIVES This presentation will enable the learner to: 1. Investigate infant deaths including workup for interstitial pneumonia. 2. Know cerebral blood flow changes in development, and cranial blood flow dynamics in non-perfused brain.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.002 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 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".