FLOW RATE REDUCER FOR PERCUTANEOUS NEPHROLITHOTRIPSY

摘要

A flow rate reducer (2) for percutaneous nephrolithotripsy (PCNL). PCNL uses an operative cannula (1) or Amplatz sheath having a cylindrical wall with constant gauge, and a kit of instruments (4) with a diameter smaller than the constant gauge of the operating cannula (1) so that each of the instruments is able to pass through the operating cannula (1). The flow rate reducer (2) consists of a tubular element having a distal end (20) with a first internal diameter so that the distal end is able to be tightly connected to the operating cannula (1), and a proximal end (21) with a second internal diameter smaller than the first internal diameter of the distal end (20), such as to allow a desired instrument of said kit of instruments (4) to pass through the flow rate reducer (2).