Retrospective analysis of adequacy of hemodialysis using the Cannon catheter (Arrow International)
Bibliographic record
Abstract
Currently there is no published data using the Cannon catheter. Our purpose was to confirm adequacy of hemodialysis using the Arrow Cannon catheter. This retrospective study used patients from one nephrology practice, utilizing two dialysis centers. All patients in a two year period meeting inclusion/exclusion criteria referred for tunneled catheter placement were included. All catheters were placed by interventional nephrologist using ultrasound for vein cannulation and fluoroscopy for placement confirmation. Pump speed (Qb), venous and arterial pressures, Kt/V, urea reduction ratio (URR), and dialysis prescriptions/adherence to the prescription were reviewed at baseline and monthly for six months. Catheter removal or six months were the study endpoints. Complications were evaluated from time of insertion throughout the study period. 38 patients were enrolled in the study. All patients were treated in the outpatient setting. Insertion outcome was successful in all 38 patients. The average dialysis prescription was approximately 400 ml/min, 3.7 hours, and 3 days a week. The mean average pump speed for all months evaluated exceeded the K/DOQI guideline of 300 ml/min. by 67.9–101.4 ml/min. The differences were significant with p < 0.01. The mean Kt/V and URR% data for each month evaluated exceeded the K/DOQI guideline values of 1.2 for Kt/V and 63% for URR% by between .34–.24 and 8%–10%, respectively; the differences were all at a significant level with p < 0.01. Mean arterial pressures for all months evaluated ranged from −218.6 to −238.1, and venous pressures averaged between 179.8 to 213.7. Only three patients experienced late complications (all of which were infections) and no patients required hospitalization post complication. Two were bacteremic; the other had tunnel infection without positive blood cultures. This is the first retrospective study to evaluate the adequacy of hemodialysis with the Cannon catheter. Our study showed that flow rates and adequacy of hemodialysis can be reached using the Cannon catheter, with minimal complications.
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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 | 0.004 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".