“First In Humans” Clinical Trial Demonstrates Non-Invasive Expulsion of Kidney Stones: NSBRI-Funded Ultrasound Technology Requires No Surgery

HOUSTON — The National Space Biomedical Research
Institute (NSBRI) announced that Dr.
Jonathan Harper will present the findings of an
FDA-registered “first in humans” trial to
non-surgically propel and expel kidney stones from
the body, during today’s plenary session at the
2015 American Urological Association (AUA) annual
meeting in New Orleans.

Dr. Harper and his colleagues in the Department
of Urology and Applied Physics Laboratory at the
University of Washington have invented a new way
to facilitate kidney stone passage or dislodge
large obstructing stones, using ultrasound. With
one probe placed on the patient’s skin, a physician can target the stone on the system’s ultrasound image. The system focuses ultrasound waves on the stone, which makes the stone “hop” to a new location. Importantly, ultrasound technology does not expose patients to x-rays or other forms of ionizing radiation. Fifteen volunteers with various body sizes presenting with stones of as large as 14 mm and from all regions of the kidney were included in the clinical trial. Kidney stones were moved in all but one subject.

Dr. Jonathan Harper said, “I am excited about presenting our findings at this year‘s AUA annual meeting. Not only does our ultrasound technology safely move and expel kidney stones, but also it is performed in the clinic setting without pain. The impact of this technology on the US healthcare system is substantial because more Americans experience nephrolithiasis, or kidney stone disease, than develop diabetes or heart disease. Kidney stones cause severe pain, obstruction of the urinary tract, and loss of worker productivity. The use of ultrasound technology to move kidney stones is a major advance with broad clinical utility for people on Earth.”

This clinical trial has been advanced with funding from NSBRI, as a project within the portfolio of the Institute’s
Smart Medical Systems and Technology (SMST)
Team. The goal of the SMST Team is to develop intelligent, integrated medical systems to deliver quality health care during spaceflight and exploration. New technologies developed by this team also deliver immediate benefits for medical care on Earth.

“During space flight, microgravity, dehydration, and altered bone metabolism collectively increase the likelihood of an astronaut developing a kidney stone,” said Jeffrey P. Sutton, M.D., Ph.D. – NSBRI’s President, CEO and Institute Director. Kidney stones have been observed in U.S. astronauts before and after spaceflight and one Russian cosmonaut reported abdominal pain on orbit which was suspected to be due to a kidney stone; however, the pain resolved within a few days. Non-invasive approaches to move and ultimately expel kidney stones from the body provide medical capabilities needed by NASA and other international space agencies. If stones can be moved and then passed while they are relatively small, downstream complications such as infection and sepsis that could end space missions may be avoided.

Ultrasound technologies have been successfully used for many years on the International Space Station (ISS), primarily to perform imaging of the astronauts’ eyes, bones, and internal organs. The successful outcome of this clinical trial mitigates the risk of renal stone formation, as identified on NASA’s Human Research Roadmap, and augments existing ISS ultrasound techniques and protocols. Technologies and countermeasures are tested on the ISS as a forerunner to deployment on future exploration mission to Mars or other deep space destinations. Since astronauts on long-duration, deep space missions will be unable to return quickly to Earth, new methods of remote medical diagnosis, monitoring and treatment are necessary. On exploration missions, it is also possible that medical procedures may be performed by a non-physician astronaut, and therefore techniques to deal with medical emergencies, such as kidney stones, must be simple to administer, robust, and highly effective.


Established in 1997 through a NASA competition, NSBRI is headquartered at Baylor College of Medicine, in the Texas Medical Center and is a consortium of twelve leading biomedical institutions. NSBRI, a 501(c) (3) organization partnered with NASA, is studying the health risks related to long-duration spaceflight and developing the technologies and countermeasures needed for human space exploration missions. The Institute’s science, technology and career development projects take place at approximately 60 institutions across the United States. For more information, please visit The Industry Forum engages the private sector to develop medical products for both space and Earth through commercialization activities and seed funding. Find out more at and follow the NSBRI Industry Forum on


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Graham Scott
Associate Director

National Space Biomedical Research Institute

Tel: 713-798-7227

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