Preserved distraction analgesia but greater impact of pain on task performance in old compared with young subjects

OBJECTIVE

In this study, we compared two working memory conditions to study the analgesic effect of a distraction in elderly versus young people and the effect of pain on performance on the distracting task.

METHODS

Twenty-seven young and 34 old subjects performed 1- and 2-Back working memory tasks, representing low and high cognitive loads, respectively. Infrequent, brief hot nociceptive and cold non-nociceptive stimulations were delivered 100 ms prior to visual N-Back stimuli. Contact heat and cold evoked potentials were analyzed in the absence of cognitive tasks and during the N-Back tasks. We compared the pain and cold intensity ratings and reaction times in trials preceded by nociceptive and cold stimulations and in trials not preceded by thermal stimulations between groups and between N-Back conditions.

RESULTS

In both groups, performing the 1- and 2-Back working memory tasks reduced the perceived intensity of nociceptive and cold stimuli. In elderly subjects performing 2-Back memory tasks, response times to trials following nociceptive stimulation were longer than to trials following cold or non-stimulation. By contrast, thermal stimulations had no effect on reaction times in young subjects. The amplitude of the N2P2 component was lower in the old compared to the young group in the absence of cognitive task. In the old group, N-Back tasks had no effect on the N2P2 amplitude, whereas it reduced N2P2 amplitude in the young.

CONCLUSION

Distraction analgesia is preserved in elderly subjects. However, this successful pain modulation seems to be accompanied by performance costs in the distracting tasks.

Impact of Virtual Reality Technology on Pain and Anxiety in Pediatric Burn Patients: A Systematic Review and Meta-Analysis

INTRODUCTION

Virtual reality (VR) has the potential to lessen pain and anxiety experienced by pediatric patients undergoing burn wound care procedures. Population-specific variables require novel technological application and thus, a systematic review among studies on its impact is warranted.

OBJECTIVE

The objective of this review was to evaluate the effectiveness of VR on pain in children with burn injuries undergoing wound care procedures.

METHODS

A systematic literature review was performed using PubMed and CINAHL databases from January 2010 to July 2021 with the keywords "pediatric," "burn," "virtual reality," and "pain." We included experimental studies of between- and within-subjects designs in which pediatric patients' exposure to virtual reality technology during burn wound care functioned as the intervention of interest. Two researchers independently performed the literature search, made judgements of inclusion/exclusion based on agreed-upon criteria, abstracted data, and assessed quality of evidence using a standardized appraisal tool. A meta-analysis was conducted to evaluate the effectiveness of the VR on burning procedural pain in pediatric population. Standardized mean difference (SMD) was used as an index of combined effect size, and a random effect model was used for meta-analysis.

RESULTS

Ten articles published between January 2010 and July 2021 passed the selection criteria: six randomized controlled trials and four randomized repeated-measures studies. Consistent results among the studies provided support for VR as effective in reducing pain and potentially pain related anxiety in children undergoing burn wound care through preprocedural preparation (n = 2) and procedural intervention (n = 8). VR effects on pain intensity ratings were moderate to large (SMD=0.60, 95%CI=0.28-0.93, p=0.0037 with no significant heterogeneity of VR intervention effects between studies. Only one study reported direct influence of VR intervention on pre-procedural situational anxiety with a moderate effect size (Cohen's d = 0.575, 95%CI = 0.11-1.04).

CONCLUSION

Children's exposure to VR during burn care procedures was associated with lower levels of pain and pain related anxiety. Moderate to large effect sizes support the integration of VR into traditional pediatric burn pain protocols irrespective of innovative delivery methods and content required for use in burned pediatric patients.

Enhancing Patient Experience in Office-Based Laryngology Procedures With Passive Virtual Reality

Objectives

Virtual reality (VR) has been used as nonpharmacologic anxiolysis benefiting patients undergoing office-based procedures. There is little research on VR use in laryngology. This study aims to determine the efficacy of VR as anxiolysis for patients undergoing in-office laryngotracheal procedures.

Study Design

Randomized controlled trial.

Setting

Tertiary care center.

Methods

Adult patients undergoing office-based larynx and trachea injections, biopsy, or laser ablation were recruited and randomized to receive standard care with local anesthesia only or local anesthesia with adjunctive VR. Primary end point was procedural anxiety measured by the Subjective Units of Distress Scale (SUDS). Subjective pain, measured using a visual analog scale, satisfaction scores, and procedure time, and baseline anxiety, measured using the Hospital Anxiety and Depression Scale (HADS), were also collected.

Results

Eight patients were randomized to the control group and 8 to the VR group. SUDS scores were lower in the VR group than in the control group with mean values of 26.25 and 53.13, respectively (P = .037). Baseline HADS scores did not differ between groups. There were no statistically significant differences in pain, satisfaction, or procedure time. Average satisfaction scores in VR and control groups were 6.44 and 6.25, respectively (P = .770). Average pain scores were 3.53 and 2.64, respectively (P = .434).

Conclusion

This pilot study suggests that VR distraction may be used as an adjunctive measure to decrease patient anxiety during office-based laryngology procedures. Procedures performed using standard local anesthesia resulted in low pain scores and high satisfaction scores even without adjunctive VR analgesia.

Level of Evidence

1

Virtual Reality as Distraction Analgesia and Anxiolysis for Pediatric Otolaryngology Procedures

OBJECTIVES/HYPOTHESIS

While virtual reality (VR) has been used as analgesia and anxiolysis for invasive procedures, no literature exists on the use of VR in the pediatric otolaryngology setting. The purpose of this study was to determine the efficacy of VR in reducing pain and anxiety for pediatric otolaryngology patients.

STUDY DESIGN

Randomized controlled trial.

METHODS

A total of 53 patients aged 7-17 undergoing in-office nasal endoscopies were included. Patients were randomized to receive VR or standard of care. Procedural pain, anxiety, and satisfaction scores were recorded from patients and caregivers. The physician filled out a childhood emotional manifestation scale (CEMS).

RESULTS

Patients in VR group reported a significant decrease in pain (0.80 ± 1.06 vs. 2.26 ± 2.38, P = .018) and anxiety (9.50 ± 12.48 vs. 38.48 ± 29.83, P = .0002) and increase in procedural satisfaction (6.40 ± 0.77 vs. 4.74 ± 1.74, P = .0002) compared to patients in control group. CEMS scores were significantly reduced in VR group (5.15 ± 0.46 vs. 9.64 ± 5.66, P = .0001) and caregiver anxiety levels were significantly reduced in VR group (11.50 ± 17.67 vs. 27.39 ± 30.48, P = .041) compared to control group. There were no reported side effects. Procedural time did not significantly differ between groups.

CONCLUSIONS

For pediatric otolaryngology patients undergoing in-office nasal endoscopies, VR is a safe and effective form of distraction analgesia and anxiolysis, significantly reducing pain and increasing procedural satisfaction for patients. In addition, VR significantly reduces anxiety for both patients and caregivers without disrupting procedural efficiency and workflow.

LEVEL OF EVIDENCE

2. Laryngoscope, 131:E1714-E1721, 2021.

Virtual Reality as Distraction Analgesia for Office-Based Procedures: A Randomized Crossover-Controlled Trial

OBJECTIVE

The purpose of this study was to explore the use of immersive and interactive virtual reality (VR) for analgesia, anxiety reduction, and overall satisfaction in patients undergoing outpatient postoperative debridements.

STUDY DESIGN

Randomized crossover-controlled trial.

SETTING

Academic outpatient clinic.

SUBJECTS AND METHODS

Adult patients who had functional endoscopic sinus surgery and skull base surgery and were undergoing office-based postoperative nasal endoscopy and debridement were recruited and followed for 2 consecutive office visits. Participants were randomized to receive either the control or experimental analgesia for the first postoperative visit (PO1) and crossed over into the opposite treatment arm during the second postoperative visit (PO2). Outcomes included procedural pain, anxiety and satisfaction scores, procedural time, and reflexive head movements per minute (RHM).

RESULTS

Eighty-two participants were recruited. At PO1, 39 received standard analgesia, and 43 received an immersive VR experience. At PO1, the VR group experienced significantly less anxiety (P = .043) and fewer RHM (P = .00016) than the control group. At PO2, the VR group experienced significantly fewer RHM (P = .0002). At PO2, patients who received the experimental treatment after initially receiving the control treatment had significantly decreased pain, anxiety, and RHM. This effect was not seen in the second group. Overall, 69.51% of patients felt that the VR treatment was better; 19.51% thought that it was the same; and 9.76% found it to be worse.

CONCLUSION

VR technology holds promise as a nonpharmacologic analgesic and anxiolytic intervention for otolaryngology office-based procedures. Further study of VR use in other procedures is warranted.

LEVEL OF EVIDENCE

1, randomized controlled trial.