Kidney

The kidneys are paired organs located in the rear abdominal cavity at the level of the costal arch. Their function is to regulate the body's water and salt balance and thus also blood pressure. They also perform an important detoxification function by excreting water-soluble metabolic products via the urine. Normally, approx. 1.5–2 litres of urine are produced per day. The colour is clear to yellowish and can be influenced by the amount of fluid consumed. Via hormonal control loops, the kidneys are also involved in blood formation, among other things.

A wide variety of changes and diseases can affect the kidneys; the spectrum ranges from findings without pathological significance to acutely threatening diseases requiring immediate treatment.

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Kidney surgery

3 methods in a fact check

What are the advantages of modern robot-assisted da Vinci operations and of Mini-PCNL, whose miniaturised instruments were developed by Prof. Lahme himself?

In this video

  • Ureteropelvic junction obstruction with urinary retention & hydronephrosis: What are the disadvantages of open surgery and conventional laparoscopy compared with a robot-assisted da Vinci operation?
  • Large kidney stones: Why does standard PCNL with larger instruments increase the risk of bleeding – and what are the advantages of Mini-PCNL?
  • Kidney cancer: What are the disadvantages of open surgery compared with a robot-assisted da Vinci partial nephrectomy with organ preservation?

About this page:

Author

Prof. Dr. med. Sven Lahme
Urology specialist

Medical director of the Goldstadt-Privatklinik.
Specialist for Urology, Mini-PCNL and robot-assisted da Vinci procedures.

Member in Scientific Societies and Reviewer of scientific journals.

Creation Date: 08.03.2020Modification date: 09.10.2026

The YouTube channel of Goldstadt Privatklinik

The Urological Video Guide

Urology explained in simple terms

Every Friday, a new explanatory video is released covering urological conditions, examinations, and therapies.