15. Barriers to the use of Femoral Nerve Blocks to Manage Hip Fracture Pain among Frail Elders
Bibliographic record
Abstract
Background: Hip fractures are a common source of pain and related morbidity among the frail elderly. One technique that has been shown to adequately manage pain in this population is the femoral nerve block. However, it is not currently employed routinely in Alberta emergency departments. Objective: The first objective was to systematically review the recent literature around the use of femoral nerve blocks. The second objective was to survey physicians about the potential barriers to routinely performing femoral nerve blocks in the emergency department. Materials and Methods: Searches of Medline, EMBASE and the Cochrane Trials database were conducted between 2010 and 2014 to identify randomized control trials examining the use of femoral nerve blocks in the ED to manage acute hip fracture pain among older adults (65 years of age and greater). The results of the systematic review were used to inform the development of the barrier survey. The survey was distributed to physician members of the Alberta Emergency and Bone & Joint Strategic Clinical Networks. Results: Seven randomized control trials were included in the review. Four studies employed a single femoral block, while three employed continuous (catheter placed) femoral blocks. All of the studies reported statistically significant reductions in pain. All but one study reported that patients treated with femoral nerve blocks consumed significantly less rescue analgesia. Finally, there were no significant adverse effects reported with the femoral block procedure. Surveys are still being collected and evaluated. Conclusions: Femoral nerve blocks appear to have benefits both in terms of decreasing pain and limiting the amount of systemic opioids administered to frail older adults experiencing a hip fracture. The results of this review and the barriers survey will help inform the development of knowledge translation strategies to increase the routine use of femoral nerve blocks.
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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 | 0.014 | 0.061 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.003 | 0.004 |
| Bibliometrics | 0.004 | 0.003 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.002 | 0.001 |
| 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".