<scp>OP</scp>22.04: Low pulmonary blood flow demonstrated by Doppler and <scp>MRI</scp> in late onset <scp>IUGR</scp>
Bibliographic record
Abstract
Animal and human studies show a reduction in placental oxygen delivery results in pulmonary vasoconstriction and cerebral vasodilation [1]. We investigated human fetal pulmonary hemodynamics in growth restricted fetuses by US and MRI compared with controls. 26 fetuses (Mean gestational age 35.85 ± 1.23 weeks) were recruited during the third trimester and underwent imaging on commercial 1.5T MR and Ultrasound systems. We measured pulmonary blood flow by PC MRI and T2 in the umbilical vein and main pulmonary artery using T2 mapping, according to previously published techniques [2,3]. Flow velocity waveforms in the middle cerebral artery, umbilical artery and main pulmonary artery branches were characterized using Doppler. Table 1 shows the comparison between US and MRI parameters of fetal hemodynamics in 6 fetuses with IUGR and 20 normal fetuses. There were three IUGR fetuses with retrograde diastolic flow in the pulmonary artery branches and reduced MCA pulsitility index (PI). PBF was inversely proportional to UV T2 and OP22.04: Table 1. Fetal hemodynamics by US and MRI MPA T2, with a trend towards a correlation between fetal DO2 and PBF, as shown in Figure 1. Supporting information can be found in the online version of this abstract Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
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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 | 0.001 | 0.065 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 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".