Effects of three interventions in facilitating voluntary pelvic floor muscle contraction in women: a randomized controlled trial

Intravaginal electrical stimulation for the treatment of pelvic floor dysfunction: a systematic review and meta-analysis

Background

Intravaginal electrical stimulation (IVES) has been explored as a potential treatment for pelvic floor disorders (PFDs), although its efficacy remains a subject of debate. We aim to conducted a comprehensive meta-analysis of relevant trials.

Methods

This meta-analysis was performed under the PRISMA 2020 guideline. We meticulously searched for randomized controlled trial (RCT) studies in various databases, including PubMed, Cochrane Library, EMBASE, and ClinicalTrials.gov, spanning from inception to March 6, 2023. All studies included one treatment group of intravaginal electrical stimulation and the diseases spectrum of the studies involved different kinds of PFDs, including urinary incontinence, overactive bladder, etc. Risk of bias charts were used to assess the risk of bias in the studies and forest plots were used the demonstrate the overall effects.

Results

Our analysis encompassed a total of 13 RCT studies. In most of the assessed PFD cure outcomes, the results demonstrated positive effects of IVES therapy, as indicated by the following findings: daily voiding frequency (MD = -1.57, 95% CI = -3.08 to -0.06, I 2 = 68%,), nocturia (MD = -1.07, 95% CI = -2.01 to -0.13, I 2 = 71%), Pad test, and Urinary incontinence. Nevertheless, the data concerning the impact of IVES therapy on the quality of life of individuals with PFDs did not confirm these positive results.

Discussion

In light of the insufficiency in both the quality and quantity of the included studies, it is premature to draw a definitive conclusion regarding the efficacy of IVES therapy for treating PFDs. Nonetheless, our study does provide several pieces of evidence in support of the potential therapeutic effects of electrical stimulation therapy in this context. We recommend that further research in this area be conducted to provide more conclusive insights into the efficacy of IVES therapy for PFDs.

Systematic review registration

https://www.crd.york.ac.uk/prospero/, identifier: CRD42023442171.

Technologies for Evaluation of Pelvic Floor Functionality: A Systematic Review

Pelvic floor dysfunction is a common problem in women and has a negative impact on their quality of life. The aim of this review was to provide a general overview of the current state of technology used to assess pelvic floor functionality. It also provides literature research of the physiological and anatomical factors that correlate with pelvic floor health. This systematic review was conducted according to the PRISMA guidelines. The PubMed, ScienceDirect, Cochrane Library, and IEEE databases were searched for publications on sensor technology for the assessment of pelvic floor functionality. Anatomical and physiological parameters were identified through a manual search. In the systematic review, 114 publications were included. Twelve different sensor technologies were identified. Information on the obtained parameters, sensor position, test activities, and subject characteristics was prepared in tabular form from each publication. A total of 16 anatomical and physiological parameters influencing pelvic floor health were identified in 17 published studies and ranked for their statistical significance. Taken together, this review could serve as a basis for the development of novel sensors which could allow for quantifiable prevention and diagnosis, as well as particularized documentation of rehabilitation processes related to pelvic floor dysfunctions.

Randomised controlled pilot trial to assess effect of electrical stimulation of weak pelvic floor muscles

INTRODUCTION AND HYPOTHESIS

Pelvic floor muscle training (PFMT) has level 1A scientific evidence for the treatment of urinary incontinence and pelvic organ prolapse. Past studies, however, have often excluded women with very weak pelvic floor muscles (PFM). The aim was to investigate the hypothesis that intravaginal electrical stimulation (iES) improves PFM strength more than PFMT in women with weak PFM, and to use these results to calculate sample size required for a future large randomised controlled trial (RCT).

METHODS

This assessor-blinded pilot RCT had a two arm, parallel design with computer-generated Randomisation. Both groups were offered 12 one-to-one physiotherapy sessions over a 6-month period. The iES group received individual tailored electrical pulse parameters. The PFMT group received PFM exercises, with the addition of facilitation techniques at therapy sessions. A power calculator was used to calculate sample size.

RESULTS

Fifteen women were recruited. Eight were randomised to iES and 7 to PFMT. Two subjects dropped out of the iES group. Median age was 49 years (range 36-77) and parity 2.1 (range 1-3). Both groups showed increases in PFM strength measured by manometery (iES 12.3, SD 12.0 vs PFMT 10.0, SD 8.1) cmH2O. There was no significant difference between groups. With a power of 0.80 we need a sample size of 95 women in each group to detect a difference between groups.

CONCLUSION

There was no significant difference between the groups in improvements in PFM strength. To detect a difference, we would have required 95 women in each group.

Physical self-concept and ability to swim in patients born with anorectal malformation and Hirschsprung's disease: a case control study

BACKGROUND

Children with anorectal malformation (ARM) and Hirschsprung's Disease (HD) live with permanent urinary and bowel symptoms, possibly impairing motor development in early childhood. Not being able to swim adds an unnecessary health risk. The aim of this study was to determine the ability to swim and physical self-concept in patients with ARM and HD.

METHODS

We performed an anonymous survey among the members of the national patient organization SoMA e.V. (6 through 25 years). A control group was recruited from our department. Ability to swim, symptom load according to Rintala Score and physical self-concept were recorded using validated questionnaires. Patients were matched with controls according to gender and age. Mean scores and 95%-confidence intervals (95%-CI) were calculated, χ²-test and multiple linear regression models were used as appropriate.

RESULTS

Totally, 83 match-control-pairs were included. Patients learned to swim at a similar age and rate (6.5 years, 95%-CI: 6.1-6.9, 74.7% swimmers) compared to controls (6.4 years, 95%-CI: 6.1-6.8, 79.5% swimmers, p = 0.46). VACTERL patients had a significantly lower swimmer rate (59.1%, p = 0.048). Swimmers had a significantly higher mean Rintala Score (12.5, 95%-CI: 11.6-13.2) compared to non-swimmers (10.4, 95%-CI: 8.1-12.1, p = 0,049). In prepubertal children (6 through 12 years), no difference in physical self-concept was shown compared to controls. Adolescents and young adults with ARM/HD, especially females, had a significantly lower mean score for the subscales of flexibility, speed, endurance and sports competence, independent of bowel symptom load according to Rintala Score.

CONCLUSIONS

Patients with ARM/HD have normal swimming skills and a normal physical self-concept in childhood that decreases with age compared to peers. In adolescence, parents and health care professionals should actively promote physical activity in ARM/HD patients.

Perspectives on the Therapeutic Effects of Pelvic Floor Electrical Stimulation: A Systematic Review

Pelvic, perineal, and nervous lesions, which derive principally from pregnancy and childbirth, may lead to pelvic floor dysfunctions, such as organ prolapses and lesions in the nerves and muscles due to muscle expansion and physiology. It is estimated that 70% of women affected by this clinical picture have symptoms that do not respond to the classical treatments with antimuscarinic and anticholinergic drugs. Therefore, resorting to efficient alternatives and less invasive methods is necessary to assist this public health problem that predominantly affects the female population, which is more susceptible to the risk factors. This study aimed to perform an updated and comprehensive literature review focused on the effects of pelvic floor electrical stimulation, considering new perspectives such as a correlation between electric current and site of intervention and other molecular aspects, different from the present reviews that predominantly evaluate urodynamic aspects. For that purpose, PubMed and ScienceDirect databases were used to perform the search, and the Methodi ordinatio method was applied. With well-researched therapeutic effects, electrical stimulation induced promising results in histological, nervous, and molecular evaluations and spinal processes, which showed beneficial results and revealed new perspectives on ways to evoke responses in the lower urinary tract in a non-invasive way. Thus, it is possible to conclude that this type of intervention may be a non-invasive alternative to treat pelvic and perineal dysfunctions.

Two devices to facilitate the perception of pelvic floor muscle contraction in the sitting position in women with urinary incontinence: comparative analysis

ABSTRACT The use of support devices may facilitate the perception of pelvic floor muscle (PFM) contraction, which is difficult to be performed. Therefore, this study aimed to compare the perception of PFM contraction in the sitting position during the use of two different support devices on women with PFM dysfunction. This is a cross-sectional study performed with 37 women with stress or mixed urinary incontinence (UI). All women performed three free PFM contractions sitting on a chair, followed by three contractions using each support device (sand pads and a cylindrical foam, which provide sciatic and perineal support, respectively). Women scored the perception of PFM contraction from 1 to 5, as well as the perception of facilitation of contraction (higher grades show better results) and discomfort (higher grades show more discomfort) when compared with free contraction. The cylindrical foam presented similar results to sand pads for the perception of PFM contraction (2.84±1.61 vs. 3.19±1.43; p=0.34) and facilitation of contraction (3.38±1.34 vs. 3.19±1.54; p=0.61), as well as for their discomfort (1.83±1.23 vs. 1.5±1.16; p=0.20). Of all women, 57% preferred sand pads. Thus, both sand pads (sciatic support) and the cylindrical foam (perineal support) improved the perception of PFM contraction and facilitation of contraction in the sitting position of women with PFM dysfunction when compared with sitting with no device. The two devices presented no difference between them.

Electrostimulation and pelvic floor muscle training: immediate effect after one single session

Abstract Introduction: Pelvic floor muscle training (PFMT) and neuromuscular electrical stimulation (NMES) are physiotherapeutic conservative treatments to prevent and to treat pelvic floor dysfunctions. Objective: To investigate the immediate effect of one session of PFMT versus NMES associated to pelvic floor muscle (PFM) contraction on the PFM function in nulliparous women. Methods: This is a cross-sectional experimental study. Twenty women were randomized into the “PFMT Group” and “NMES Group”. PFM function evaluation was performed by vaginal palpation and manometry before and after a single session. PFMT was composed by one series of eight sustained contractions of 6 seconds and one series of four fast contractions, in four different positions. NMES parameters were: biphasic pulsed current; frequency: 50 Hz; pulse duration: 0.7 ms; cycle on:off 4:8s; rise/decay: 2/2s, time: 20 minutes; and intensity: participant' sensibility. Data was analyzed by the ANOVA two-way for repeated measures to verify the difference between groups, within group and the interactions for PFM function. A 5% probability was considered in all tests. Results: There were no significant differences between groups. At intra-group analysis, there was a significant decrease in the maximal voluntary contraction (p = 0.01), by manometry, between pre- and post-session for both groups. Conclusion: The immediate effects of a single session of PFMT and NMES associated with voluntary PFM contraction are similar on PFM function, that is, no difference was found between groups.

Intravaginal electrical stimulation increases voluntarily pelvic floor muscle contractions in women who are unable to voluntarily contract their pelvic floor muscles: a randomised trial

QUESTION

In women who are unable to contract their pelvic floor muscles voluntarily, what is the effect of an intravaginal electrical stimulation regimen on their ability to contract the pelvic floor muscles and on self-reported urinary incontinence?

DESIGN

Randomised controlled trial with concealed allocation, blinded assessors and intention-to-treat analysis.

PARTICIPANTS

Sixty-four women with pelvic floor muscle function assessed by bi-digital palpation to be grade 0 or 1 on the Modified Oxford Scale.

INTERVENTION

For 8 weeks, participants randomised to the experimental group received weekly 20-minute sessions of intravaginal electrical stimulation with instructions to attempt pelvic floor muscle contractions during the bursts of electrical stimulation in the final 10 minutes of each session. The control group received no intervention.

OUTCOME MEASURES

The primary outcome was ability to voluntarily contract the pelvic floor muscles, evaluated through vaginal palpation using the Modified Oxford Scale. Secondary outcomes were prevalence and severity of urinary incontinence symptoms assessed by the International Consultation on Incontinence Questionnaire on Urinary Incontinence-Short Form (ICIQ-UI-SF) score from 0 to 21.

RESULTS

Sixty-one participants provided outcome data. After the intervention, the ability to contract the pelvic floor muscles was acquired by 36% of the experimental group and 12% of the control group (absolute risk difference 0.24, 95% CI 0.02 to 0.43). The experimental group also improved by a mean of 2 points more than the control group on the ICIQ-UI-SF score (95% CI 0.02 to 3.97).

CONCLUSION

In women who are unable to contract their pelvic floor muscles voluntarily, 8 weeks of intravaginal electrical stimulation with voluntary contraction attempts improved their ability to contract their pelvic floor muscles and reduced the overall severity and impact of urinary incontinence on quality of life. Although the main estimates of these effects indicate that the effects are large enough to be worthwhile, the precision of these estimates was low, so it is not possible to confirm whether the effects are trivial or worthwhile.

TRIAL REGISTRATION

NCT03319095.

What improvements in levator ani motor function lead to improvement in stress urinary incontinence signs and symptoms in females?

INTRODUCTION AND HYPOTHESIS

The objectives were to determine whether levator ani muscle (LAM) motor function is associated with female stress urinary incontinence (SUI) severity, and whether changes in LAM motor function induced through pelvic floor muscle training (PFMT) are associated with improvements in SUI signs and symptoms.

METHODS

Pelvic morphology and LAM function were evaluated using ultrasound imaging and manual palpation using the elements of the PERFECT Scheme (Power, Endurance, Repetitions, Fast contractions, Elevation, Co-contraction and Timing) before and after women with SUI underwent a 12-week PFMT intervention. SUI severity was determined subjectively (ICIQ-FLUTS-UI) and objectively (30-min pad test [30MPT]).

RESULTS

At baseline (n = 97), less leakage on the 30MPT was weakly associated with higher bladder neck position (ρ_s = -0.209,p = 0.044), yet with lower LAM function based on the PERFECT Scheme (overall score: ρ_s = 0.206, p = 0.043; repeated maximum voluntary contractions (MVCs): ρ_s = 0.203, p = 0.046; power/motor control: ρ_s = 0.214, p = 0.035). Lower symptom severity (ICIQ-FLUTS-UI) was associated with observed perineal lift during coughing (U = 34.000; p = 0.042). All measures of SUI severity and LAM function were significantly improved after PFMT intervention. Greater improvements in bladder neck elevation during MVC (ρ_s = -0.261, p = 0.027) and greater reductions in levator plate length during MVC (ρ_s = 0.292, p = 0.016) were weakly associated with greater reductions in leakage (30MPT), the latter also being associated with more improvement symptoms (ICIQ-FLUTS-UI; ρ_s = 0.238, p = 0.041). Greater improvement in the ability to repeat MVCs (ρ_s = 0.303, p = 0.009) was weakly associated with smaller improvements in symptoms (ICIQ-FLUTS-UI).

CONCLUSION

Improvements in bladder neck support and elevation show weak associations with improvement in SUI signs and symptoms. LAM function as measured by the PERFECT Scheme is not associated with SUI severity in women, and improvements in LAM function when measured by the PERFECT Scheme are not associated with improvements in SUI signs and symptoms.

Are visual inspection and digital palpation reliable methods to assess ability to perform a pelvic floor muscle contraction? An intra-rater study

AIMS

To investigate the intrarater reliability of visual inspection and digital palpation to classify women's ability to perform a voluntary pelvic floor muscle (PFM) contraction and the association between the two methods.

METHODS

This was a test-retest clinical study including 44 women. The ability to perform a PFM voluntary contraction was evaluated two times in all participants using visual inspection and digital palpation. All analyzed participants were assessed with a 7-day interval between the two assessments and by the same examiner. Kappa's agreement coefficient was used to estimate the intrarater reliability, and Fisher's exact test was used to analyze association between the two methods.

RESULTS

This study found a substantial intrarater reliability of visual inspection (k = 0.73; p < .001) and digital palpation (k = 0.74; p < .001). A significant association between visual inspection and digital palpation was found at both time points (p < .001).

CONCLUSION

Both visual inspection and digital palpation have substantial intrarater reliability and visual inspection can be recommended when vaginal palpation is not tolerated.

A guide to physiotherapy in urogynecology for patient care during the COVID-19 pandemic

Introduction and aim

Physiotherapy in urogynecology faces challenges to safely continuing its work, considering the adoption of social distancing measures during the COVID-19 pandemic. Some guidelines have already been published for urogynecology; however, no specific documents have been produced on physiotherapy in urogynecology. This article aimed to offer guidance regarding physiotherapy in urogynecology during the COVID-19 pandemic.

Methods

A group of experts in physiotherapy in women’s health performed a literature search in the Pubmed, PEDro, Web of Science and Embase databases and proposed a clinical guideline for physiotherapy management of urogynecological disorders during the COVID-19 pandemic. This document was reviewed by other physiotherapists and a multidisciplinary panel, which analyzed the suggested topics and reached consensus. The recommendations were grouped according to their similarities and allocated into categories.

Results

Four categories of recommendations (ethics and regulation issues, assessment of pelvic floor muscle function and dysfunction, health education and return to in-person care) were proposed. Telephysiotherapy and situations that need in-person care were also discussed. Regionalization is another topic that was considered.

Conclusion

This study provides some guidance for continuity of the physiotherapist's work in urogynecology during the COVID-19 pandemic, considering the World Health Organization recommendations and the epidemiological public health situation of each region. Telephysiotherapy can also be used to provide continuity of the care in this area during the COVID-19 pandemic, opening new perspectives for physiotherapy in urogynecology.

Is pelvic floor muscle strength and thickness associated with pelvic organ prolapse in Nepali women? - A cross-sectional study

BACKGROUND

Pelvic floor muscle function has been shown to be inversely associated with pelvic organ prolapse in Western women, however differences have been documented between ethnic groups.

OBJECTIVE

To determine if pelvic floor muscle strength and thickness and hiatal area are associated with pelvic organ prolapse in Nepali women.

METHODS

This cross-sectional study included non-pregnant Nepali women ≥18 years attending an outpatient gynecology clinic in Kathmandu, Nepal. A clinical examination included the pelvic organ prolapse quantification (POP-Q)- system examination and Modified Oxford Scale. Puborectalis muscle thickness and hiatal area were assessed using 3D/4D translabial ultrasound. Statistical analysis included Pearson's correlation and multiple regression (p<0.05).

RESULTS

Of the 123 women; 14 (11%) had POP-Q stage 0 prolapse, 29 (24%) stage I, 69 (56%) stage II, 8 (7%) stage III, and 3 (2%) stage IV. Mean±SD Modified Oxford Scale was 3.37±0.48 and muscle thickness was 1.14±0.21cm, hiatal area at rest was 14.67±3.11cm² and on contraction was 11.29±2.51cm². No associations were found between pelvic floor muscle strength or thickness and POP-Q stages 0-IV. There was a positive correlation found between hiatal area at rest and pelvic organ prolapse stage (r=0.34, p<0.001)and hiatal area on contraction and prolapse stage (r=0.30, p<0.001) and a negative correlation between pelvic floor muscle strength and hiatal area on contraction (r=-0.36, p<0.001).

CONCLUSION

In contrast to previous findings, pelvic floor muscle strength and thickness are not associated with pelvic organ prolapse in this sample of Nepali women. It is important to consider these findings when developing pelvic organ prolapse treatment and management strategies in this population.

Urinary Incontinence in Women: Modern Methods of Physiotherapy as a Support for Surgical Treatment or Independent Therapy

Urinary incontinence (UI) is a common health problem affecting quality of life of nearly 420 million people, both women and men. Pelvic floor muscle (PFM) training and other physiotherapy techniques play an important role in non-surgical UI treatment, but their therapeutic effectiveness is limited to slight or moderate severity of UI. Higher UI severity requires surgical procedures with pre- and post-operative physiotherapy. Given that nearly 30%-40% of women without dysfunction and about 70% with pelvic floor dysfunction are unable to perform a correct PFM contraction, therefore, it is particularly important to implement physiotherapeutic techniques aimed at early activation of PFM. Presently, UI physiotherapy focuses primarily on PFM therapy and its proper cooperation with synergistic muscles, the respiratory diaphragm, and correction of improper everyday habits for better pelvic organ support and continence. The purpose of this work is a systematic review showing the possibilities of using physiotherapeutic techniques in the treatment of UI in women with attention to the techniques of PFM activation. Evidence of the effectiveness of well-known (e.g., PFM training, biofeedback, and electrostimulation) and less-known (e.g., magnetostimulation, vibration training) techniques will be presented here regarding the treatment of symptoms of urinary incontinence in women.

Do women have an accurate perception of their pelvic floor muscle contraction? A cross-sectional study

AIMS

To assess women's self-perception of their pelvic floor muscle (PFM) contraction and its agreement with an assessed PFM contraction. Further, to assess a possible correlation between women's self-perception and reports of urinary incontinence (UI) and between PFM contraction and severity of UI.

METHODS

A cross-sectional observational study including 82 women. The study was conducted in a basic healthcare unit in Brazil. PFM contraction was assessed by a physiotherapist and estimated by women using the Modified Oxford Scale (MOS). UI symptoms were assessed using a validated questionnaire (ICIQ-UI-SF). A descriptive analysis of the data was performed. The weighted κ coefficient, Spearman's correlation coefficient, and Fisher's exact test were used to analyze data.

RESULTS

Eighty-two women with a mean age of 46.83 (±17.94) were analyzed. The majority (98.8%) believed they were able to voluntarily contract their PFM, but only 33% correctly estimated their PFM considering the examiner assessment as reference. No agreement (κ = 0.139, P = .087) was found between the examiner's classification and the women's estimation of their PFM contraction. Women's self-perception did not correlate with the ICIQ-IU-SF (r's = .011, P = .922). A moderate negative correlation was found between the assessed PFM contraction and the ICIQ-UI-SF score (r's = -.406, P = .00).

CONCLUSION

Most of the women did not show an accurate self-perception of PFM contraction. No correlation between women's self-perception and the ICIQ-UI-SF score was found, but a negative correlation was found between the assessed PFM contraction and the ICIQ-UI-SF score.

Understanding and interpreting confidence and credible intervals around effect estimates

INTRODUCTION

Reporting confidence intervals in scientific articles is important and relevant for evidence-based practice. Clinicians should understand confidence intervals in order to determine if they can realistically expect results similar to those presented in research studies when they implement the scientific evidence in clinical practice. The aims of this masterclass are: (1) to discuss confidence intervals around effect estimates; (2) to understand confidence intervals estimation (frequentist and Bayesian approaches); and (3) to interpret such uncertainty measures.

CONTENT

Confidence intervals are measures of uncertainty around effect estimates. Interpretation of the frequentist 95% confidence interval: we can be 95% confident that the true (unknown) estimate would lie within the lower and upper limits of the interval, based on hypothesized repeats of the experiment. Many researchers and health professionals oversimplify the interpretation of the frequentist 95% confidence interval by dichotomizing it in statistically significant or non-statistically significant, hampering a proper discussion on the values, the width (precision) and the practical implications of such interval. Interpretation of the Bayesian 95% confidence interval (which is known as credible interval): there is a 95% probability that the true (unknown) estimate would lie within the interval, given the evidence provided by the observed data.

CONCLUSIONS

The use and reporting of confidence intervals should be encouraged in all scientific articles. Clinicians should consider using the interpretation, relevance and applicability of confidence intervals in real-world decision-making. Training and education may enhance knowledge and skills related to estimating, understanding and interpreting uncertainty measures, reducing the barriers for their use under either frequentist or Bayesian approaches.