Urethral clamps

Various radiological and surgical instruments, including urethral clamps, have been developed to try to improve retrograde/ascending urethrogram (RUG/ASU) and voiding cystourethrogram (VCUG) technique in males. These are very rarely (if ever) used anymore.

Brodny clamp

This device has a metallic prong that secures the glans penis and a rubber cone that catheterizes the urethral meatus 2. By most accounts the device can be used successfully for RUGs and VCUGs, but whether it offers enough added benefit to counterbalance the negative psychic effect of attaching a metal clamp to the end of a conscious patient's genitals was a matter of debate. Few (if any) radiology departments have the device anymore.

Zipser clamp

This device is a thin flexible metallic clip that applies pressure to the tip of the penis at the urethral meatus. The idea is to obstruct flow during the voiding phase of a VCUG, in order to dilate the urethra and better evaluate potential strictures ("choke voiding cystourethrography") 2-4. This could also be accomplished with pressure applied by the examiner's hand, but the clamp avoids putting the examiner's hand near the x-ray beam.

Share article

Article information

rID: 40935
System: Urogenital
Synonyms or Alternate Spellings:
  • Brodny clamp
  • Zipser clamp
  • Choke voiding cystourethrography
  • Choke voiding cystourethrogram
  • Choke voiding cystourethrograms
  • Penile clamp
  • Penile clamps

Support Radiopaedia and see fewer ads

Cases and figures

  • A penile clamp (r...
    Case 1: penile clamp
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.