Virtual Reality Distraction to Help Control Acute Pain during Medical Procedures

Abstract

Excessive pain during medical procedures is a widespread problem. Severe pain is especially problematic for severe burn patients who often endure dozens of wound cleanings/debridements and dozens of physical therapy sessions over a period of weeks or months after their initial injury. Pain medications help substantially, but are typically inadequate to control such intense pain from mechanical stimulation of pain receptors during severe burn wound cleaning/debridement. Immersive Virtual Reality (VR) distraction, a nonpharmacologic analgesic used in addition to traditional pain medications, may help bring pain down to more tolerable levels during medical procedures. Patients report 35–50% reductions in procedural pain while in a distracting immersive world, and fMRI brain scans show large drops in pain-related brain activity during virtual reality analgesia (www.vrpain.com). Contrary to concerns that distraction would not work with patients in severe to excruciating pain, preliminary results show that VR distraction is most effective for patients who need it the most, those with the highest pain intensity levels. VR is thought to reduce pain by blocking people’s view of the real world, directing patients’ attention into the virtual world, leaving less attention available to process incoming signals from pain receptors. Consistent with an attentional mechanism, results of laboratory studies show that highly immersive VR systems (hypothesized to be more attention demanding) reduce pain more effectively than less immersive VR systems. We review evidence from clinical and laboratory research studies exploring Virtual Reality analgesia, concentrating primarily on the work ongoing within our group. We briefly describe preliminary results of VR applications for settings other than burn patients; dental fears patients, venipuncture, cerebral palsy patients during physical therapy, older male patients undergoing endoscopic trans-urethral microwave thermo-therapy of an enlarged benign prostate, and patients in pain from a blunt force trauma injury. Finally, we briefly discuss recent and future improvements in VR distraction technology.