Single-Center Experience With the Dual-Focus Storz Modulith SLX-F2 Lithotripter: A Retrospective Study
Bibliographic record
Abstract
Background: To calculate the modified efficiency quotient of the mobile Storz Modulith SLX-F2 lithotripter, to identify factors determining clinical succes rate and to identify complications and limitations with this device. Comparison of the results with reported data from other institutions for the same machine and other types in the peer review literature will be made. Methods: The study design is a retrospective chart review. Inclusion criteria include male and female and patients who were treated in the Texas Tech University Health Sciences Center for urinary calculi with the Storz Modulith SLX-F2 lithotripter between September 2006 and June 2011. During this period, 447 patients with single stones were treated, and 10 patients with radiolucent stones and 21 patients with incomplete follow-up were excluded. The patients were followed up with plain radiography and/or renal ultrasound to assess the clinical succes rate. Univariate and multivariate analyses were performed to identify the factors determining the clinical success rate. Results: Follow-up was complete for 416 patients. Mean age was 46.1 ± 14.4 years. The mean numbers of shock waves given were 2,457 and 2,838 for renal and ureteral stones, respectively. Mean stone sizes were 9.3 ± 4.5 mm and 9.7 ± 4.9 mm for renal and ureteral stones, respectively. Mean body mass index was 30.5 ± 7.04 kg/m 2 . The overall clinical success rate after one ESWL treatment was 84.6% (85.4% and 83.6% for renal and ureteral stones, respectively). The modified efficiency quotient was 0.69. On univariate analysis, clinical success rate was associated with smaller stone size ( < 10 mm, P = 0.016), and absence of a ureteral stent (31.7% vs. 10.5%; P = 0.0002). Presence of lower calyx stones (P = 0.04) was a negative predictor of clinical success. On multivariate analysis, lower calyx stones, smaller stone size and the absence of a ureteral stent continued to be significant determinants of clinical success status. All complications were minor with a complication rate of 4.3%. Conclusions: The mobile Storz Modulith SLX-F2 lithotripter is clinically effective in the management of solitary renal and ureteral stones. It has an adequate modified efficiency quotient combined with a favorable safety profile. Major advantages are the increased treatment depth in combination with exceptionally high weight limit and a dual-focus system. World J Nephrol Urol. 2014;3(1):7-17 doi: http://dx.doi.org/10.14740/wjnu111w
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 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 | 0.001 |
| 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".