Clinically Shown Results

Clinical trials in Europe and the U.S. have demonstrated that the hydrogel is safe, and that the space created can significantly reduce the radiation delivered to the rectum.


66% fewer SpaceOAR Hydrogel patients experienced clinically significant declines in detectable bowel quality of life1


65% fewer SpaceOAR Hydrogel patients experienced clinically significant declines in detectable urinary quality of life1


SpaceOAR Hydrogel patients who had erections sufficient for intercourse at baseline were 67% more likely to retain sexual function at 3 years2

Watch what physicians have to say about SpaceOAR Hydrogel

Over 50,000 men have been treated with SpaceOAR Hydrogel around the globe. It is used in many of the leading cancer centers in the U.S., Europe, Japan and Australia.3

SpaceOAR Hydrogel has been embraced by leading cancer institutions, used in more than 50,000 patients and referenced in over 75 publications.*3

Patients who didn’t receive SpaceOAR Hydrogel were 8 times as likely to report a drop in quality of life as a result of their radiation therapy. 1,2

SpaceOAR Hydrogel patients experienced a 73% relative reduction in rectal V70 in a 222-patient prospective multicenter, randomized clinical study with a 3-year follow.up.*3

*Average dose reduction when comparing pre- and post-spacer treatment plans

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Get started by entering your ZIP code below and click submit. You will be redirected to a map view showing you the nearest doctors to your location.
*Please note, there may be other doctors in your area who treat prostate cancer not listed here.


  1. Hamstra DA, Mariados N, Sylvester J, et al. Continued benefit to rectal separation for prostate radiation therapy: Final results of a phase III trial. Int J Radiat Oncol Biol Phys. 2017 Apr 1;97(5):976-85.
  2. Hamstra D, Shah D, Kurtzman S, et al. Evaluation of sexual function on a randomized trial of a prostate rectal spacer. J Clin Oncol. 2017 February 20;35(Suppl 6):69.
  3. Data on file with Boston Scientific.
  4. Mariados N, Sylvester J, Shah D, et al. Hydrogel spacer prospective multicenter randomized controlled pivotal trial: Dosimetric and clinical effects of perirectal spacer application in men undergoing prostate image guided intensity modulated radiation therapy. Int J Radiat Oncol Biol Phys. 2015 Aug 1;92(5):971-7.

Caution: U.S. Federal law restricts this device to sale by or on the order of a physician.
CAUTION: The law restricts these devices to sale by or on the order of a physician. Indications, contraindications, warnings and instructions for use can be found in the product labeling supplied with each device. Information for use only in countries with applicable health authority registrations. This material not intended for use in France. Products shown for INFORMATION purposes only and may not be approved or for sale in certain countries. Please check availability with your local sales representative or customer service.

SpaceOAR is intended to temporarily position the anterior rectal wall away from the prostate during radiotherapy for prostate cancer and in creating this space it is the intent of SpaceOAR Hydrogel to reduce the radiation dose delivered to the anterior rectum.

As with any medical treatment, there are some risks involved with the use of SpaceOAR Hydrogel. Potential complications associated with SpaceOAR Hydrogel include, but are not limited to: pain associated with SpaceOAR Hydrogel injection; pain or discomfort associated with SpaceOAR Hydrogel; needle penetration of the bladder, prostate, rectal wall, rectum or urethra; injection of SpaceOAR Hydrogel into the bladder, prostate, rectal wall, rectum or urethra; local inflammatory reactions; infection; injection of air, fluid or SpaceOAR Hydrogel intravascularly; urinary retention; rectal mucosal damage, ulcers, necrosis; bleeding; and rectal urgency. Please talk to your doctor about the risks and benefits associated with SpaceOAR Hydrogel.

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© 2020 Boston Scientific Corporation or its affiliates. All rights reserved. URO-747508-AA APR 2020