Noninvasive laser coagulation of the canine vas deferens, ex vivo

Christopher M. Cilip, Jonathan P. Jarow, Nathaniel M. Fried

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Male sterilization (vasectomy) is more successful, safer, less expensive, and easier to perform than female sterilization (tubal ligation). However, female sterilization is more popular, due to male fear of vasectomy complications (e.g. incision, bleeding, infection, and scrotal pain). The development of a completely noninvasive vasectomy technique may allay some of these concerns. Ytterbium fiber laser radiation with a wavelength of 1075 nm, average power of 11.7 W, 1-s pulse duration, 0.5 Hz pulse rate, and 3-mm-diameter spot was synchronized with cryogen cooling of the scrotal skin surface in canine tissue for a treatment time of 60 s. Vas thermal lesion dimensions measured 2.0 ± 0.3 mm diameter by 3.0 ± 0.9 mm length, without skin damage. The coagulated vas bursting pressure measured 295 ± 72 mm Hg, significantly higher than typical vas ejaculation pressures of 136 ± 29 mm Hg. Noninvasive thermal coagulation and occlusion of the vas is feasible.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
StatePublished - 2009
EventPhotonic Therapeutics and Diagnostics V - San Jose, CA, United States
Duration: Jan 24 2009Jan 26 2009


OtherPhotonic Therapeutics and Diagnostics V
Country/TerritoryUnited States
CitySan Jose, CA


  • Incisionless
  • Laser
  • Male sterilization
  • Noninvasive
  • Vas deferens
  • Vasectomy

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


Dive into the research topics of 'Noninvasive laser coagulation of the canine vas deferens, ex vivo'. Together they form a unique fingerprint.

Cite this