Solar-powered oxygen delivery: proof of concept
Bibliographic record
Abstract
SETTING: A resource-limited paediatric hospital in Uganda. OBJECTIVE: Pneumonia is a leading cause of child mortality worldwide. Access to life-saving oxygen therapy is limited in many areas. We designed and implemented a solar-powered oxygen delivery system for the treatment of paediatric pneumonia. DESIGN: Proof-of-concept pilot study. A solar-powered oxygen delivery system was designed and piloted in a cohort of children with hypoxaemic illness. RESULTS: The system consisted of 25 × 80 W photovoltaic solar panels (daily output 7.5 kWh [range 3.8-9.7kWh]), 8 × 220 Ah batteries and a 300 W oxygen concentrator (output up to 5 l/min oxygen at 88% [±2%] purity). A series of 28 patients with hypoxaemia were treated with solar-powered oxygen. Immediate improvement in peripheral blood oxygen saturation was documented (median change +12% [range 5-15%], P < 0.0001). Tachypnoea, tachycardia and composite illness severity score improved over the first 24 h of hospitalisation (P < 0.01 for all comparisons). The case fatality rate was 6/28 (21%). The median recovery times to sit, eat, wean oxygen and hospital discharge were respectively 7.5 h, 9.8 h, 44 h and 4 days. CONCLUSION: Solar energy can be used to concentrate oxygen from ambient air and oxygenate children with respiratory distress and hypoxaemia in a resource-limited setting.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| 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) | 0.000 | 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".