Ultrasound-assisted peripheral venous cannulation in patients undergoing elective surgery under general anaesthesia: prospective randomized trial
Bibliographic record
Abstract
Introduction Peripheral venous catheter (PVC) insertion is a common intervention, conventionally performed using visualization and palpation techniques. It has been reported that the first attempt success rate can be as low as 51%. Ultrasound guidance improves the overall success rate and the success rate of the first attempt. Therefore, we performed a randomized, prospective, clinical trial to compare two different techniques of PVC insertion in the setting of an operating theatre with a focus on the first attempt success rate. Material and methods This clinical trial allocated patients scheduled for elective surgery in general anaesthesia to undergo PVC cannulation with ultrasound guidance (Group A) or to undergo PVC cannulation without the use of ultrasound (Group B). Results A total of 613 adult patients were enrolled. The success of the first cannulation attempt was significantly higher in Group A compared to Group B (Group A: 90.6%, Group B: 84.5%, <i>P</i> = 0.039). The overall success rate in both groups was 100%. The time needed to perform PVC cannulation was significantly lower in Group B than Group A (Group A: 406 ± 200 s, Group B: 301 ± 215 s, <i>P</i> < 0.001). Conclusions We found that ultrasound-guided PVC cannulation was associated with a higher first-attempt success rate than the conventional technique.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| 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".