Results of Octaplex for reversal of warfarin anticoagulation in patients with hip fracture
Bibliographic record
Abstract
Background: Patients with hip fracture who present anticoagulated with warfarin often require reversal of anticoagulation for safe hip fracture surgery. Vitamin K is typically administered for this, but requires 24–48 hours for maximal effect. These patients have an increased delay to surgery and increased mortality. Octaplex is a prothrombin complex concentrate (PCC) that reverses warfarin anticoagulation in less than an hour. This study assesses the effectiveness and safety of Octaplex for reversal of warfarin anticoagulation for hip fracture surgery. Methods: We reviewed the medical records of all patients with hip fracture in Calgary who received Octaplex between 2009 and 2015. Timing of admission, Octaplex administration and hip fracture surgery were recorded. Mortality and cardiac, thrombotic and orthopedic complications were assessed. Results: Median time from Octaplex administration to an international normalized ratio of 1.4 or lower was 1.1 hours. The median time from admission to surgery was 22 hours. Thirty-day mortality was 15.2%, with 4 cases of cardiac arrest and 1 respiratory arrest. Patients who received both Octaplex and fresh frozen plasma (FFP) had a lower rate of 30-day survival than those who received only Octaplex (95.7% v. 60.0%, p = 0.002). Conclusion: There were significant rates of cardiac events and 30-day mortality among patients who received Octaplex, but this is unsurprising in this population with multiple medical comorbidities. We caution against administrering both FFP and a PCC in patients for warfarin reversal. Octaplex is effective for rapidly reversing warfarin anticoagulation and reducing delays to hip fracture surgery. Further study comparing Octaplex to reversal using only vitamin K is required.
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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 | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".