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Trial record 1 of 1 for:    NCT00663533
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VAS-2 Vasectomy With the Vax-X (VAS-2)

This study has been completed.
Information provided by (Responsible Party):
John Amory, University of Washington Identifier:
First received: April 18, 2008
Last updated: December 2, 2014
Last verified: December 2014
The purpose of this research study is to study an experimental vasectomy device called the Vas-X. This is an experimental study of this new approach to vasectomy.

Condition Intervention Phase
Healthy Device: Vas-X Phase 1

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: Vasectomy With the Vas-X, a Simple, Minimally Invasive Device for Male Sterilization: A Pilot Study

Resource links provided by NLM:

Further study details as provided by John Amory, University of Washington:

Primary Outcome Measures:
  • absence of sperm in ejaculated semen 6 months after vasectomy [ Time Frame: 6-months ]

Secondary Outcome Measures:
  • any side effects as well as degree of occlusion of the resected segment of vas deferens [ Time Frame: 6-months ]

Enrollment: 10
Study Start Date: April 2008
Study Completion Date: July 2013
Primary Completion Date: July 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
No Intervention: Device study only. Device: Vas-X
mechanical vasectomy device

Detailed Description:

The Vas-X works by stripping the lining of the vas deferens, the tube that sperm pass through during ejaculation. It is used in a way very similar to routine vasectomy, however, in a routine vasectomy, the vas is burned with an electrical device. With the Vas-X, there is no burning. The investigators are testing the Vas-X to determine whether it will offer a better way of performing a vasectomy.

The investigators will conduct this study at the University of Washington Medical Center, Seattle.


Ages Eligible for Study:   30 Years to 55 Years   (Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • healthy male with normal physical findings
  • normal testicular volume (15-30mL)
  • detectable sperm in ejaculates

Exclusion Criteria:

  • Men with past history of

    • hypertension
    • significant cardiovascular
    • thromboembolic disorders
    • renal (including undiagnosed urinary tract bleeding)
    • hepatic, prostatic and testicular disease
    • prior vasectomy or scrotal surgery
    • infertility
  • Men with a past history of drug abuse will also be excluded.
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Please refer to this study by its identifier: NCT00663533

United States, Washington
University of Washington
Seattle, Washington, United States, 98195
Sponsors and Collaborators
University of Washington
Principal Investigator: John Amory University of Washington
  More Information

Additional Information:
Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: John Amory, Professor, University of Washington Identifier: NCT00663533     History of Changes
Other Study ID Numbers: 32431-B
Study First Received: April 18, 2008
Last Updated: December 2, 2014

Keywords provided by John Amory, University of Washington:
Contraception processed this record on September 21, 2017