Treatment recommendations for the management of persistent pelvic pain: a systematic review of international clinical practice guidelines.

BACKGROUND: Females with persistent pelvic pain (PPP) report great variability in the treatments recommended to them despite the availability of clinical practice guidelines (CPGs) that aim to standardise care. A clear consensus for the best practice care for PPP is required. OBJECTIVE: To identify and summarise treatment recommendations across CPGs for the management of PPP, and appraise their quality. SEARCH STRATEGY: MEDLINE, CENTRAL, EMBASE, EmCare, SCOPUS, the Cochrane Database of Systematic Reviews, Web of Science Core Collection and relevant guideline databases were searched from their inception to June 2021. SELECTION CRITERIA: Included CPGs were those for the management of urogynaecological conditions in adult females published in English, of any publication date, and endorsed by a professional organisation or society. DATA COLLECTION AND ANALYSIS: We screened 1379 records and included 20 CPGs. CPG quality was assessed using The Appraisal of Guidelines for Research and Evaluation II (AGREE-II) tool. Descriptive synthesis compiled treatment recommendations across CPGs. MAIN RESULTS: The CPGs for seven conditions provided 270 individual recommendations. On quality appraisal, guidelines on average scored 'excellent' for the domains 'scope and purpose' (80.6%, SD = 13.3) and 'clarity and presentation' (74.4%, SD = 12.0); for other domains, average scores were satisfactory or poor. Four guidelines (for Endometriosis: NICE, RANZCOG and ESHRE; for polycystic ovary syndrome: Teede et al. 2018, International Evidence Based Guideline for the Assessment and Management of Polycystic Ovary Syndrome, Monash University, Melbourne, Australia) were deemed recommended for use. Recommendations were most frequent for pharmaceutical and surgical interventions. Recommendations were variable for psychological, physiotherapy and other conservative interventions. CONCLUSIONS: The quality of CPGs for PPP is generally poor. Several CPGs endorse the consideration of biopsychosocial elements of PPP. Yet most recommend pharmaceutical, surgical and other biomedical interventions.

Perceptual Inference in Chronic Pain: An Investigation Into the Economy of Action Hypothesis.

OBJECTIVE: The experience of chronic pain critically alters one's ability to interact with their environment. One fundamental issue that has received little attention, however, is whether chronic pain disrupts how one perceives their environment in the first place. The Economy of Action hypothesis purports that the environment is spatially scaled according to the ability of the observer. Under this hypothesis it has been proposed that the perception of the world is different between those with and without chronic pain. Such a possibility has profound implications for the investigation and treatment of pain. The present investigation tested the application of this hypothesis to a heterogenous chronic pain population. METHODS: Individuals with chronic pain (36; 27F) and matched pain-free controls were recruited. Each participant was required to judge the distance to a series of target cones, to which they were to subsequently walk. In addition, at each distance, participants used Numerical Rating Scales to indicate their perceived effort and perceived pain associated with the distance presented. RESULTS: Our findings do not support the Economy of Action hypothesis: there were no significant differences in distance estimates between the chronic pain and pain-free groups (F1,60=0.927; P=0.340). In addition, we found no predictive relationship in the chronic pain group between anticipated pain and estimated distance (F1,154=0.122, P=0.727), nor anticipated effort (1.171, P=0.281) and estimated distance (F1,154=1.171, P=0.281). DISCUSSION: The application of the Economy of Action hypothesis and the notion of spatial perceptual scaling as a means to assess and treat the experience of chronic pain are not supported by the results of this study.

Dissociable neural mechanisms underlying the modulation of pain and anxiety? An FMRI pilot study.

The down-regulation of pain through beliefs is commonly discussed as a form of emotion regulation. In line with this interpretation, the analgesic effect has been shown to co-occur with reduced anxiety and increased activity in the ventrolateral prefrontal cortex (VLPFC), which is a key region of emotion regulation. This link between pain and anxiety modulation raises the question whether the two effects are rooted in the same neural mechanism. In this pilot fMRI study, we compared the neural basis of the analgesic and anxiolytic effect of two types of threat modulation: a "behavioral control" paradigm, which involves the ability to terminate a noxious stimulus, and a "safety signaling" paradigm, which involves visual cues that signal the threat (or absence of threat) that a subsequent noxious stimulus might be of unusually high intensity. Analgesia was paralleled by VLPFC activity during behavioral control. Safety signaling engaged elements of the descending pain control system, including the rostral anterior cingulate cortex that showed increased functional connectivity with the periaqueductal gray and VLPFC. Anxiety reduction, in contrast, scaled with dorsolateral prefrontal cortex activation during behavioral control but had no distinct neural signature during safety signaling. Our pilot data therefore suggest that analgesic and anxiolytic effects are instantiated in distinguishable neural mechanisms and differ between distinct stress- and pain-modulatory approaches, supporting the recent notion of multiple pathways subserving top-down modulation of the pain experience. Additional studies in larger cohorts are needed to follow up on these preliminary findings.