Schelin Catheter®

Device for sterile transurethral
injections of drugs into the prostate

about the schelin catheter

The Catheter is a CE-marked* device for injections of legally marketed drugs into the prostate. At first glance the Schelin Catheter® looks like a normal urinary catheter but it has an extra channel through which a thermoplastic cannula is inserted. The cannula is connected to a syringe and thus drugs can be injected directly into the prostate in a sterile transurethral way.

When local anaesthesia is administered with the Schelin Catheter:

* Not approved in US, China & other MDSAP countries


The injection technique is based on Cleggs / Walsh’s vascular and neural microanatomy where blood vessels and nerves enter and leave the prostate in the base area. This corresponds to the inside of the prostate where a transrectal “periprostatic block” is placed at the corresponding place outside the prostate. (See picture and reference).

The Schelin Catheter is inserted into the urethra after which the balloon is inflated and anchored to the bladder neck. By rotating the catheter and adjusting the protruding part of the needle the operator is enabled to inject drugs into a number of places in and around the prostate tissue. The catheter is rotated by pushing it 2 – 5 cm further into the urethra, turned and then pulled back. The drainage lumen of the catheter also makes it possible to drain the bladder. It is not possible to remove the needle from the catheter.

recommended catheter positions

The injections are always made after aspiration and positioned
“Clockwise” according to Clegg’s anatomy at 1, 4. 8 and 11.


The figure on the right is an example when using it in conjunction with Water Vapor therapy.

Wide experience:

    • Since 2005, > 13.000 CoreTherm (TUMT) cases have been performed in the Nordic region where the Schelin Catheter has been used. Then local anaesthesia with adrenaline is administered into the prostate through the catheter and this contributes to both a substantially painless treatment and a reduced blood flow in the prostate, which in turn has shortened the thermotherapy treatment to today’s approximately 10-15 minutes.
    • In 2022, the Schelin Catheter was used before water vapor therapy to administer lidocaine.

Published Studies:

  • Use of the Schelin Catheter for transurethral intraprostatic anesthesia prior to Rezūm treatment (Hamouda et al, 2024)
  • Full operative and postoperative pain control before water vapor therapy, shortening of hospitalization and treatment time. (Siena et al, 2023)
  • Less blood loss per resected gram in conjunction with TURP (Stenmark et al. 2023)
  • Less analgesics needed and reduced treatment time for TUMT (Schelin, 2002)
  • Reduced prostate bleeding (Schelin et al, 2004) (TUR-P)
  • Reduced peri-operative bleeding (Schelin, 2009) (TUR-P)
  • Reduced need for intravenous analgesics, reduced treatment time for(Knutson, 2009)
  • Larger resection weights of TUR-P (Stenmark, 2021)

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