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Related Concept Videos

Partial Fractions01:28

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A partial fraction is a component of a rational expression represented as the sum of simpler fractions. When a rational function is expressed as a ratio of two polynomials, it can often be decomposed into a sum of fractions whose denominators are simpler polynomials, typically linear or irreducible quadratic factors. This process is called partial fraction decomposition, and it is used to simplify complex expressions for integration, solving equations, or analysis.Partial fraction decomposition...
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An experiment is a planned activity carried out under controlled conditions. The purpose of an experiment is to investigate the relationship between two variables. When one variable causes change in another, we call the first variable the explanatory or independent variable. The affected variable is called the response or dependent variable. In a randomized experiment, the researcher manipulates values of the explanatory variable and measures the resulting changes in the response variable. The...
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Application of Microwave Ablation in Laparoscopic Partial Splenectomy
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Laparoscopic partial nephrectomy using the Simon clamp: our experience in 18 cases.

Gonzalo Vitagliano1, Leandro Blas1, Maximiliano Ringa1

  • 1Servicio de Urología. Hospital Alemán de Buenos Aires. Ciudad de Buenos Aires. Argentina.

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Laparoscopic partial nephrectomy using the Simon clamp is a feasible technique for kidney tumors, preserving renal function and achieving oncological control. This method minimizes ischemia time, crucial for patient outcomes.

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Area of Science:

  • Urology
  • Surgical Oncology
  • Nephrology

Background:

  • Kidney tumors account for 2-3% of adult malignancies.
  • Partial nephrectomy is the gold standard for localized renal tumors.
  • Minimizing renal ischemia time is critical for preserving postoperative kidney function.

Purpose of the Study:

  • To evaluate the feasibility and outcomes of laparoscopic partial nephrectomy using selective renal parenchymal compression with the Simon clamp.
  • To assess the impact of this technique on renal function and oncological control.

Main Methods:

  • Retrospective analysis of patients undergoing renal tumor surgery between January 2011 and June 2016.
  • Selection of 18 cases treated with laparoscopic partial nephrectomy and Simon clamp.
  • Analysis of demographic, operative, and postoperative outcomes, including glomerular filtration rate and follow-up for recurrence.

Main Results:

  • The study included 18 patients with a mean age of 56.27 years; 17 had polar, exophytic tumors.
  • Average operative time was 83.25 minutes, with a renal ischemia time of 21.36 minutes.
  • No significant change in glomerular filtration rate (preoperative: 83 ml/min, postoperative: 87 ml/min, p=0.42) and no recurrences observed during a mean follow-up of 23.1 months.

Conclusions:

  • Laparoscopic partial nephrectomy with the Simon clamp is a feasible and safe technique for selected polar, exophytic renal tumors.
  • The technique effectively controls vascular supply, minimizes ischemia time, and preserves renal function.
  • Satisfactory oncological control was achieved with no observed recurrences in the study cohort.