EP15.01: Feasibility study of the structured first trimester anatomical assessment at 12–14 weeks gestation: obstetric ultrasound providers survey
Bibliographic record
Abstract
Canadian SOGC guideline recommends a fetal anatomic assessment at the time of the first trimester (1T) ultrasound; however, clinical stakeholder opinion and uptake are unknown. This study aims to determine the views of obstetric US providers regarding the feasibility of implementing a routine 1T anatomy scan among the general obstetrical population. National questionnaires were distributed to Canadian obstetric US providers via an emailed link to the electronic survey through their membership bodies with implied consent (REB 20-0370). Items assessed include knowledge and training, current practice, structures routinely documented, barriers to implementation, suggestions for support and improvement. Descriptive analysis with mean (standard deviation) and frequency (percentage) was performed using IBM SPSS statistics version 26.0. A total of 795 questionnaires over 2 mailings were completed and analysed. Overall, 46% routinely assess fetal anatomy and 36% have had formal training in the 1T anatomy US. Most routinely document Crown–rump length (100%), heart rate (97%), profile (75%), nasal bone (76%), nuchal translucency (72%), adnexa (95%), and placental location (84%). The majority of providers is not routinely assessing anatomy but feels it is feasible to document cranium (61.1%), cardiac axis/situs (53.5%), stomach (60.0%) fetal cord insertion (63.0%), bladder (64.4%), and limbs (54.1%). Barriers to performing 1T anatomy assessment include: allocated time (55.8%), education and training (47.9%), quality of equipment (26.9%). About 46% of respondents estimated that 30 minutes would be sufficient time; 27% preferred 45-60 minutes. Most obstetric US providers in Canada indicate the routine 1T anatomy scan is feasible with appropriate support and attention to modifiable factors. This survey data will assist in the development and implementation of a standardised protocol for 1T anatomy at the provincial and national level.
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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 | 0.028 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".