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Trends in Renal Surgery: Robotic Technology is Associated with Increased Use of Partial Nephrectomy      11/3/2014

 

      The Journal of Urology
      Volume 189, Issue 4 , Pages 1229-1235, April 2013
Underuse of partial vs radical nephrectomy for renal tumors was noted in recent population based analyses. An explanation is the learning curve associated with laparoscopic partial nephrectomy. We analyzed state trends in renal surgery and their relationship to the introduction of robotic technology.

Materials and Methods

We used the Maryland HSCRC (Health Services Cost Review Commission) database to identify patients who underwent radical or partial nephrectomy, or renal ablation from 2000 to 2011. Utilization trends, and associated patient and hospital factors were analyzed using multivariate logistic regression. ICD-9 robotic modifier codes were established in October 2008.

Results

Of the 14,260 patients included in analysis 11,271 (79.0%), 2,622 (18.4%) and 367 (2.6%) underwent radical and partial nephrectomy, and renal ablation, respectively. Partial nephrectomy increased from 8.6% in 2000 to 27% in 2011. Open radical nephrectomy decreased by 33%, while minimally invasive radical nephrectomy increased by 15%. Robot-assisted laparoscopic partial nephrectomy increased from 2008 to 2011, attaining a 14% rate at university and 10% at nonuniversity hospitals (p = 0.03). It was associated with increased partial nephrectomy (OR 9.67, p <0.001). Younger age, male gender and low patient complexity predicted partial nephrectomy on overall analysis, while higher hospital volume and university status were predictors only in earlier years.

Conclusions

Partial nephrectomy use increased in Maryland from 2001 to 2011, which was facilitated by robotic technology

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