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Virtual Reality Pain Reduction


University of Washington Seattle and U.W. Harborview Burn Center (no-profit)

 

This research made possible by funding from the following current major benefactors

 

 

Immersive virtual reality pain distraction was originated and developed by Hoffman & Patterson at the Univ. of Washington Seattle and Harborview Burn Center.

All images on this webpage are copyrighted. Please e-mail hunter@hitL.washington.edu for permission.

 

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Photo on right shows a patient using U.W. HITLab/Harborvview’s SnowWorld pain distraction at Shriners Children’s Burn Center Galveston. UW designer/researcher Hunter Hoffman’s latest version of SnowWorld was created for the UW by gifted worldbuilders at www.firsthand.com:  using www.3ds.com Virtual World Development Software.

The University of Washington Harborview Burn Center, directed by Dr. Nicole Gibran, is a regional burn center. Patients with severe burns from 5 surrounding states are sent to Harborview for special care. Harborview has pioneered a number of advanced treatments (e.g., early skin grafting). As a result of advances here and elsewhere, the chances of surviving a bad burn, and quality of living for survivors has improved dramatically over the past 20 years.

Unfortunately, the amount of pain and suffering experienced by patients during wound care remains a worldwide problem for burn victims as well as a number of other patient populations.

When patients are resting (most of the time), opioids (morphine and morphine-related chemicals) are adequate for controlling their burn pain.  In sharp contrast, during wound care such as daily bandage changes, wound cleaning, staple removals etc., opioids are not enough, not even close. As shown in the figure below, over 86% of the burn patients reported having severe to excruciating pain during wound care (shown in red), even when standard levels of opioids were used. The pain management techniques in use are not good enough. Patients are suffering, a fact particularly disturbing when the patients are children.



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 David Patterson, Ph.D, (above in living color) and Sam Sharar, MD (above in black and white)

In 1996, Hunter Hoffman and David Patterson co-originated the new technique of using immersive VR for pain control and began collaborating with Sam Sharar, MD shortly thereafter. Hunter is a VR researcher from the U.W. Human Interface Technology Laboratory with a background in human cognition and attention. Since 1993 he has been exploring ways to increase the illusion of going inside virtual worlds (presence), how VR affects allocation of attentional resources, and therapeutic applications of VR.

Professor David R. Patterson studies psychological techniques (e.g., hypnosis) for reducing severe acute burn pain of patients at Harborview Burn Center in Seattle. Dave is head of the Division of Psychology of the U.W. Dept of Rehabilitation Medicine. He is a recipient of the Milton H. Erickson Award for Scientific Contributions to Hypnosis, and has a grant from NIH to study VR burn pain control. Our interdisciplinary research team is using VR adjunctively, IN ADDITION TO TRADITIONAL opioids. This UW/Harborview clinical team includes Sam Sharar, Gretchen Carrougher, Mark Jensen, Maryam Soltani, Aubriana Teeley, Dolly Morse working with dedicated staff at Harborview Hospital.

SnowWorld, developed at the University of Washington HITLab in collaboration with Harborview Burn Center, was the first immersive virtual world designed for reducing pain.  SnowWorld was specifically designed to help burn patients. Patients often report re-living their original burn experience during wound care, SnowWorld was designed to help put out the fire. Our logic for why VR will reduce pain is as follows. Pain perception has a strong psychological component. The same incoming pain signal can be interpreted as painful or not, depending on what the patient is thinking. Pain requires conscious attention. The essence of VR is the illusion users have of going inside the computer-generated environment. Being drawn into another world drains a lot of attentional resources, leaving less attention available to process pain signals. Conscious attention is like a spotlight. Usually it is focused on the pain and wound care. We are luring that spotlight into the virtual world. Rather than having pain as the focus of their attention, for many patients in VR, the wound care becomes more of an annoyance, distracting them from their primary goal of exploring the virtual world.

In our preliminary case study (published in the medical journal "Pain"), two patients with severe burns were studied.  Patient 1 had five staples removed from a burn skin graft while playing Nintendo, rated his pain, and six staples removed from the same skin graft while in VR, and rated his pain again. He reported dramatic reductions in pain during VR.

Patient 2 (treatment order randomized) was a bigger challenge. He had a severe burn covering over 33% of his body. Encouragingly, as shown in the graph below, patient 2 also showed large reduction of pain during wound care while in VR compared to while playing a video game.

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In all of our VR pain control studies, patients, (especially children and teenaged burn patients) have shown enthusiasm about participating.
The effectiveness of virtual reality pain distraction has now been documented in a small but growing number of clinical studies published in peer-reviewed medical journals.

For a list of VR studies using SnowWorld and other VR therapies (click here).

WATERFRIENDLY VR



Water friendly virtual reality goggles funded by the Washington State Firefighters Fund, Ross Chambers, and the Scan|Design Foundation BY INGER & JENS BRUUN. This fiberoptic VR helmet developed by our team allows patients to go into virtual reality while getting wound care/debridement/bandages changed in a hydro tank, partially submerged in water. (Clinical Journal of Pain).  A related magnet-friendly VR goggles have allowed us to study the neural correlates of VR pain reduction.


fMRI BRAIN SCANS

 

Pain research using fMRI brain scans show significant reductions in pain-related brain activity during SnowWorld in healthy volunteers getting thermal pain stimulations (NeuroReport; see also Anesthesia and Analgesia).

Christopher Maani MD, Chief of Anesthesia at Brooke Army Medical Center Institutes of Surgical Research in San Antonio, is exploring the use of VR pain distraction in soldiers injured in combat.  Luckily, VR was most effective for patients who needed it the most.  During painful wound cleaning procedures, soldiers with the highest pain during treatment as usual ("no VR") showed the largest reductions in pain during VR. 

With funding from NIH (Dave Patterson PI), our team centered at Harborview Burn Center in Seattle is now conducting multi-site clinical trials on pediatric burn patients who receive VR for 10 days in a row, in collaboration with Dr. Walter Meyers at Shriners Hospital for Children Galveston, (and researchers at Shriners Boston). 


With NIH funding and essential donations from individuals and charities, we are also conduct laboratory pain studies at Sam Sharar MD's pain lab at the UW Dept of Anesthesia, at the HITlab and Eric Seibel's Photonics lab at UW Mechanical Engineering. These studies are helping shed light on how to make VR more effective, by improving our understanding of how VR works (mechanism).

Private donations from you are crucial for accelerating the translation of VR distraction from research tool into clinical practice (ie., private donations will help make VR accessible to severe burn patients).

This research is contributing to a paradigm shift towards heavier reliance on non-drug pain control techniques.  You can help.

Our unusual interdisciplinary team of researchers on the University of Washington's VR pain distraction project includes VR experts, pain experts, clinical doctors/nurses, physical therapists, occupational therapists, research coordinators and even brain scan experts.  Although caregivers currently rely almost exclusively on pharmacologic analgesia, results of the this VR project are drawing attention to the potential of non-traditional psychological pain control techniques for adjunctive treatment of extreme pain during medical procedures (VR can be used on top of conventional pain medications).

"Virtual Reality Therapy" article published in
Scientific American Magazine (see also www.sciam.com), UW Medicine article, and a VR Review paper

 


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A snapshot of good old SnowWorld 2003, image by Stephen Dagadakis, copyright Hunter Hoffman, U.W. The original version of SnowWorld (completed in 2003) was developed by Hunter Hoffman, with help from Kristin Darken, Jeff Bellinghausen and Chuck Walter from Multigen, Brian Stewart from SimWright Inc., Howard Abrams (freelance worldbuilder), and Duff Hendrickson from the UW HITLab. Thank you. The version of SnowWorld currently being used was designed by Hoffman and built by Ari Hollander and Howard Rose from www.firsthand.com