Evaluation of a Continuously Recording Ambulatory Pulse Oximeter During a Mountaineering Expedition
Bibliographic record
Abstract
We report a field trial of a novel, continuously recording ambulatory pulse oximeter. Seven military mountaineers climbed Mt. Logan, Canada, in June 1999. During the ascent, they carried an ambulatory pulse oximeter that was designed to perform frequent, round-the-clock measurements of altitude, oxygen saturation and pulse rate. None of the devices performed to expectations, due to a variety of problems with the hardware, software and human factors issues. However, we were able to obtain a recording from one individual that showed both episodic nocturnal desaturations and desaturation during exercise during a single 24-hour period. Additionally, an analysis of distributions of oxygen saturations in one climber revealed an increasing interquartile range and a decreasing median oxygen saturation between base camp (altitude 2760 m) and camp 1 (altitude 3460 m). We conclude that continuously recording ambulatory pulse oximetry is a theoretically interesting but unproven concept in mountain expedition research, and recommend that the devices be redesigned, rebuilt and retested.
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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 | 0.003 | 0.006 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| 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".