Ultrasound-Guided Lumbar Plexus Block Reduces Emergence Agitation in Children Undergoing Hip Surgery: A Prospective Randomized Controlled Trial
Bibliographic record
Abstract
Abstract Background Emergence agitation (EA) is a common and challenging postoperative problem in children emerging from general anesthesia. It is associated with self-injury, increases stress on healthcare team members and postoperative maladaptive behavioral changes. However, no completely effective prevention has been found for EA. Pain is considered to be an important contributor to EA. Ultrasound-guided lumbar plexus block is a safe and effective anesthetic technique that can provide satisfactory pain relief in pediatric hip surgery. We aim to investigate the effect of ultrasound-guided lumbar plexus block on emergence agitation in children undergoing hip surgery. Methods This prospective, randomized, controlled study was conducted in children aged 1-6 yr undergoing elective hip surgery. Subjects were randomly assigned to receive either ultrasound-guided lumbar plexus block combined with general anesthesia (Group Block, n=60) or routine general anesthesia (Group Control, n=60). The primary outcome was the incidence of EA at 30 min after emergence from general anesthesia, assessed using the Pediatric Anesthesia Emergence Delirium (PAED) scale. The secondary outcomes included the incidence of severe EA, postoperative pain evaluated by the Children’s Hospital of eastern Ontario Pain Scale (CHEOPS) and the incidence of postoperative adverse complications. PAED, CHEOPS were measured at 0, 5, 10, 20, and 30 min after emergence from anesthesia. Results The incidence of EA was significantly lower in Group Block than in Group Control [13.3% vs. 43.3%, odds ratio (OR) 0.201, 95% confidence interval (CI) 0.082to 0.496, p<0.001]. Group Block had a lower incidence of severe EA than Group Control [3.3% vs. 18.3%, odds ratio (OR) 0.154, 95% confidence interval (CI) 0.032 to 0.727, p=0.019]. CHEOPS was lower in Group Block than in Group Control [mean (95%CI), 4.5(4.4-4.6) vs.4.9 (4.8-5.0), p<0.001]. Conclusion Ultrasound-guided lumbar plexus block could decrease the incidence and severity of emergence agitation in children undergoing hip surgery effectively. Trial registration: Chinese Clinical Trial Registry: ChiCTR-INR-17011525 (30/05/2017)
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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 | 0.002 | 0.004 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.004 | 0.002 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.004 | 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".