Tech & Tools
Studies Show Potential of Virtual Reality to Reduce Children’s Anxiety, Pain
Innovative virtual reality (VR) technologies hold promise in reducing children’s anxiety and pain before and after medical procedures and surgery, according to two studies presented at the ANESTHESIOLOGY 2018 annual meeting.
One study found VR that induces a hypnotic state helped manage postoperative anxiety and pain in children. A second study suggests that a novel VR program that has the ability to adjust cognitive load (the amount of information that is being processed) and reorient the program’s display when a child changes position during medical procedures may reduce the child’s anxiety and perception of pain.
Postoperative VR Hypnosis Reduces Need for Anxiety, Pain Medications
Twenty-one children were included in the study. Ten children received VRH support after surgery in addition to usual postoperative pain management, which included patient-controlled analgesia with opioids, while 11 children did not receive VRH.
“It’s been well documented that reducing preoperative anxiety correlates with reducing postoperative pain,” says study coauthor Girish P. Joshi, MD, a professor of anesthesiology and pain management at the University of Texas Southwestern Medical School in Dallas. “To our knowledge, this is the first study to assess the postoperative use of virtual reality hypnosis in children. Our goal is not only to decrease pain but also to decrease opioid use.”
The children receiving VRH participated in one session per day for 20 minutes during the first 72 hours after surgery. They wore a helmet and goggles linked to software, which uses VRH technology to decrease stress and anxiety after painful medical procedures. The children chose a scenario—e.g., beach, submarine, or walking in the mountains—and heard soothing speech and music to induce hypnosis.
The VRH group had a significantly lower need for supplemental treatment—only 20% in the VRH group required pain medication (IV morphine), compared with 62.5% in the control group, while 37.5% of the VRH group required antianxiety medication, compared with 100% in the control group. Total postoperative IV morphine consumption over 72 hours after surgery was significantly less in the VRH group—1.18 mg/kg compared with 2.15 mg/kg in the control group.
“Morphine is associated with a sedating effect that may prevent patients from eating and walking sooner,” Joshi says. “The significant reduction in morphine use seen in patients given VRH means they can have a quicker recovery.”
Children in the VRH group were able to sit up and/or walk more quickly after surgery (23 hours compared with 33 hours in the control group), another important sign of recovery, Joshi notes. Additionally, children in the VRH group experienced less vomiting (40% vs. 83.3% in the control group) and their urinary catheters were removed sooner (20 hours vs. 41 hours in the control group). Total hospital length of stay was 125.5 hours in the VRH group compared with 137.7 hours in the control group.
“We are very encouraged by the initial findings in this pilot study,” Joshi says. “Next we need to conduct a randomized controlled study. Our hope is that virtual reality hypnosis will one day be used for most patients undergoing all types of surgeries to reduce postoperative pain and speed recovery.”
Using VR to Reduce Children’s Anxiety, Perception of Pain
“We have known for years that pain and anxiety are highly correlated,” says study coauthor Thomas J. Caruso, MD, a clinical associate professor of anesthesiology, perioperative and pain medicine at Stanford University in California. “If someone is extremely anxious about something that is about to occur, they are more likely to report pain. Our goal is to distract our pediatric patients to reduce their anxiety and perception of pain.”
The program was launched in 2017 as part of CHARIOT (childhood anxiety reduction through innovation and technology), a Stanford University program that uses VR in a variety of settings, both in the hospital and clinic, to distract patients during periods of high anxiety, such as IV placement, blood draws, port access, or dressing changes. The researchers developed the new VR platform in response to a problem they had encountered when using other VR programs: When a patient changed position, such as going from lying down to sitting, existing VR technology did not change position along with them.
“During a typical VR experience, when you look up, you are looking at the sky,” explains study lead author Samuel Rodriguez, MD, a clinical assistant professor of anesthesiology, perioperative and pain medicine at Stanford. “The reorientation feature that we developed allows the horizon line to be reoriented every time the patient’s head position changes.”
The program also adjusts the patient’s cognitive load, which means using faster music, more colors, or increased game play to increase the game’s ability to distract in order to reduce anxiety. It is used primarily before and during minor medical procedures such as IV placement, wound care, cast or surgical pin removal, and nasal endoscopy, typically for 2 to 20 minutes.
“Preliminary results have suggested our new VR game decreases anxiety and patients’ perception of pain,” Caruso says. “The randomized trial is ongoing, and the results have not yet been finalized. There have been no reports of side effects or patient intolerance in a wide range of inpatient and outpatient settings. We are currently expanding use of the technology into our institution’s obstetrics service line for epidural placement in laboring mothers as well as for physical therapy.”
The authors note that while further studies are needed to quantify the anxiety-reducing and pain-reducing effects, their case series demonstrates the feasibility of this VR experience as a nonpharmacological treatment that can distract patients safely while limiting patient movement in a wide variety of clinical settings.
— Source: American Society of Anesthesiologists