Effectiveness of music on anxiety and pain among cardiac surgery patients: A quantitative systematic review and meta-analysis of randomized controlled trials

The psychophysiology of music-based interventions and the experience of pain

In modern times there is increasing acceptance that music-based interventions are useful aids in the clinical treatment of a range of neurological and psychiatric conditions, including helping to reduce the perception of pain. Indeed, the belief that music, whether listening or performing, can alter human pain experiences has a long history, dating back to the ancient Greeks, and its potential healing properties have long been appreciated by indigenous cultures around the world. The subjective experience of acute or chronic pain is complex, influenced by many intersecting physiological and psychological factors, and it is therefore to be expected that the impact of music therapy on the pain experience may vary from one situation to another, and from one person to another. Where pain persists and becomes chronic, aberrant central processing is a key feature associated with the ongoing pain experience. Nonetheless, beneficial effects of exposure to music on pain relief have been reported across a wide range of acute and chronic conditions, and it has been shown to be effective in neonates, children and adults. In this comprehensive review we examine the various neurochemical, physiological and psychological factors that underpin the impact of music on the pain experience, factors that potentially operate at many levels - the periphery, spinal cord, brainstem, limbic system and multiple areas of cerebral cortex. We discuss the extent to which these factors, individually or in combination, influence how music affects both the quality and intensity of pain, noting that there remains controversy about the respective roles that diverse central and peripheral processes play in this experience. Better understanding of the mechanisms that underlie music's impact on pain perception together with insights into central processing of pain should aid in developing more effective synergistic approaches when music therapy is combined with clinical treatments. The ubiquitous nature of music also facilitates application from the therapeutic environment into daily life, for ongoing individual and social benefit.

The effect of music on the operating surgeon: a pilot randomized crossover trial (the MOSART study)

OBJECTIVE

The experience of stress is common among surgeons while working in the operating theatre (OT). Understanding and finding ways to mitigate this stress is important for optimizing surgical quality and maintaining clinician wellbeing. In this pilot study, we tested the feasibility and reported the outcomes of measuring the effect of background music on intra-operative surgeon stress in the clinical environment.

METHODS

The effect of Music on the Operating Surgeon: A pilot Randomized crossover Trial (the MOSART study) was conducted over a 9-month period in a single-centre. Vascular and general surgeons acting as primary operators (POs) performing elective, general anaesthetic operations were included. The intervention was surgeon-selected music, and the control was the absence of music. Outcome measures were feasibility (recruitment rate, practicability, and completeness of data), heart rate variability (HRV) indices, the Six-Item State-Trait Anxiety Inventory (STAI-6), and the Surgical Task-load Index (SURG-TLX).

RESULTS

Five POs performed 74 eligible randomized cases. The protocol was well tolerated, and no cases were abandoned. Data was incomplete in 8% of cases. The overall mean (SD) operative SURG-TLX score was 48 (±22). Mean HR increased and RMSSD decreased significantly from baseline, suggesting reduced parasympathetic activity while operating. The presence of intra-operative music was not found to affect the psychological or physiological outcomes.

CONCLUSIONS

A music interventional study of this nature is feasible in the operating theatre environment, though no difference was found between in the music and non-music conditions. Follow-up research in a simulated environment with intensive physiological monitoring could be considered.

Benefits of Music Intervention on Anxiety, Pain, and Physiologic Response in Adults Undergoing Surgery: A Systematic Review and Meta-analysis

PURPOSE

Evidence on factors influencing the variations of music's effect on anxiety and pain in surgical patients is unclear. We aimed to elucidate the effects of music intervention on anxiety and pain throughstudy characteristics.

METHODS

We conducted a search on the PubMed, CINAHL, Embase, Cochrane, and Web of Science databases from March 7 to April 21, 2022, for randomized controlled trials (RCTs) for the effect of music intervention on anxiety, pain, and physiological responses in surgical patients. We included studies published within the last 10 years. We assessed the risk of bias in the study using the Cochrane risk of bias tool for randomized trials and performed meta-analyses using a random-effects model for all outcomes. We used change-from-baseline scores as summary statistics and computed bias-corrected standardized mean differences (Hedges'g) for anxiety and pain outcomes and mean differences (MD) for blood pressure and heart rate.

RESULTS

Of the 454 records retrieved, 30 RCTs involving 2280 participants were found to be eligible. Music intervention was found to be superior to standard care in reducing anxiety (Hedges' g = -1.48, 95% confidence interval: -1.97 to -0.98), pain (Hedges's g = -0.67, -1.11 to -0.23), systolic blood pressure (MD = -4.62, -7.38 to -1.86), and heart rate (MD = -3.37, -6.65 to -0.10) in surgical patients. The impact of music on anxiety and pain relief varied significantly depending on the duration of the intervention. The largest effect was observed in interventions lasting between 30 and 60 minutes, with a decrease in anxiety and pain.

CONCLUSIONS

Music intervention is an effective way to reduce anxiety, pain, and physiological responses in surgical patients. Future reviews examining the influence of different types of surgery on the effects of music would add to the body of knowledge in this field. This study has been registered on the International Prospective Register of Systematic Reviews (PROSPERO) under the number CRD42022340203, with a registration date of July 4, 2022.

Efficacy of non-pharmacological interventions in pain relief and opioid consumption after cardiac surgery: A systematic review and Bayesian network meta-analysis

OBJECTIVE

To investigate and rank the evidence for the efficacy of non-pharmacological interventions in relieving pain after cardiac surgery using comprehensive comparisons.

BACKGROUND

Although several previous systematic reviews and meta-analyses showed that non-pharmacological interventions effectively control and reduce pain after cardiac surgery, none quantitatively compared the effect of these different types of interventions.

DESIGN

Systematic review and Bayesian network meta-analysis based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses for Network Meta-Analysis guidelines.

METHODS

Six databases were searched from inception to April 2021 to collect all published evidence from randomised clinical trials. One author extracted the relevant information from the eligible trials; a second author independently reviewed the data. Before analysing the extracted data, two investigators independently assessed the quality of the included studies. Conventional meta-analysis was conducted using either fixed- or random-effects models according to statistical heterogeneity. The Bayesian network meta-analysis was conducted using the consistency model.

RESULTS

We identified 42 randomised clinical trials comparing 14 groups with 4253 patients. Transcutaneous electrical nerve stimulation, acupressure, music and massage were effective for pain relief, with transcutaneous electrical nerve stimulation being associated with the best probability of successful pain relief after cardiac surgery (cumulative ranking curve surface, 0.97; probability, 77.03%). Acupressure (cumulative ranking curve surface, 0.79; probability, 30.69%) was the second-best option. However, there was no evidence that any pair-up intervention significantly reduced opioid use or anxiety.

CONCLUSIONS

These findings suggest that transcutaneous electrical nerve stimulation, acupressure, music and massage may effectively alleviate postoperative cardiac pain, with transcutaneous electrical nerve stimulation representing the best choice for pain relief.

RELEVANCE TO CLINICAL PRACTICE

The results of this network meta-analysis can guide patients after cardiac surgery and healthcare providers to make optimal decisions in managing postoperative cardiac pain.

TRIAL REGISTRATION

PROSPERO CRD42021246183.