Pulse Oximeter with Longer Averaging Time and Missed Chronic Hypoxia in Preterm Infants
Bibliographic record
Abstract
Background: Targeted oxygen saturation in preterm infants has been an area of debate for decades. Mild chronic hypoxia exposes some infants to significant comorbidities like pulmonary artery hypertension (PAH). The pulse oximeters vary in technical properties and setting; pulse oximeters with shorter SpO 2 averaging time may provide a more accurate oxygen assessment. Aim: To evaluate the readiness of preterm infants for discharge based on the current unit's protocol which uses standard pulse oximetry with an averaging time of 20s, as opposed to a pulse oximeter with a shorter averaging time (2s). Methods: The study was a prospective observational pilot study included all infants <32 weeks' postmenstrual age (PMA) with no cardiovascular or respiratory pathology other than related to prematurity, such as bronchopulmonary dysplasia (BPD) and persistent ductus arteriosus. All infants underwent Echocardiography studies after the 2 nd week of life and after 36 weeks to exclude PAH. All infants older than 36 weeks PMA who were off oxygen and ready to be discharged home as per unit's protocol underwent final oxygen assessment for a minimum of 6 h using motion resistant oximeter with a SpO 2 short averaging time of 2s. Results: Thirty-five infants underwent the oxygen pulse oximetry testing. Of them, 42% were found to have chronic hypoxia (defined as 5% of recorded time with SpO 2 ≤ 90%) and fulfilled the diagnostic criteria for BPD. Conclusions: A significant number of infants at 36 weeks' PMA with chronic hypoxia were missed using the current unit's oxygen assessment. With the prevalence being higher in infants diagnosed with BPD, a future study must be conducted to investigate the correlation between missed chronic hypoxia in infants with BPD and late-onset PAH.
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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 | 0.002 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 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".