Magnetic stimulation for female patients with stress urinary incontinence, a meta-analysis of studies with short-term follow-up

Flat Magnetic Stimulation for Urge Urinary Incontinence

Background and Objectives: Strategies for overactive bladder syndrome (OAB) management involve, among others, strengthening the bladder outlet to suppress urgency and neuromodulating the sacral roots. Magnetic stimulation (MS) is a technology that involves an extracorporeal device that is able to provide an electromagnetic field specifically designed to interact with pelvic floor neuromuscular tissue. The resulting tissue electrical activity induces contraction of the pelvic muscle and neuromodulation of the S2-S4 sacral roots. Flat Magnetic Stimulation (FMS) is a relevant advancement involving homogeneous electromagnetic fields, which are able to optimize the effect on the entire pelvic area. However, the benefits of this new technology for OAB syndrome are poorly known. Consequently, the aim of our study is to analyze the outcomes and quality of life (QoL) impact of FMS with Dr. Arnold (DEKA, Calenzano, Italy) in women suffering from OAB syndrome associated with urinary incontinence. Materials and Methods: This prospective study included patients with OAB, urge urinary incontinence, and no ongoing OAB treatments. At baseline (T0), the Incontinence Impact Questionnaire (IIQ-7), the Female Sexual Function Index (FSFI-19), and the International Consultation on Incontinence Questionnaire-Urinary Incontinence Short Form (ICIQ-UI SF) were collected. Patients underwent 8 FMS sessions of 25 min each in one month. At the termination of the therapy (T1), women repeated the ICIQ-UI SF, FSFI-19, and IIQ-7 tools. Moreover, the Patient Global Impression of Improvement (PGI-I) questionnaire was collected to evaluate the cure rate. Results: Our study enrolled a total of 57 consecutive patients. Most women had at least one second- or third-line treatment before FMS, while the remaining naive patients had contraindications to pharmacological treatments. No women reported adverse effects during the treatment. After the treatment, we observed a decrease in the IIQ-7 (p < 0.001) and ICIQ-UI SF scores (p < 0.001) and an improvement in sexual function (p < 0.001) evaluated with FSFI-19. According to PGI-I scores, 42 (73.7%) women referred to some kind of improvement, scoring ≤ 3 points. Specifically, 8.7% of patients considered themselves very much improved, 29.8% much improved, 35.1% minimally improved, and 26.3% found no changes. FMS was effective in treating OAB symptoms without any adverse effects. The mechanism is supposed to be related to suppressing the initiation of micturition. This makes FMS a promising device for treating naive and refractory urge urinary incontinence. Conclusions: The new FMS represents a promising non-pharmacological option for the treatment of naive and refractory OAB.

Evaluation of Possible Side Effects in the Treatment of Urinary Incontinence with Magnetic Stimulation

Background and Objectives: Magnetic stimulation is a type of conservative treatment of urinary incontinence. Our aim was to evaluate the possible side effects of this method. Materials and Methods: We conducted a systematic literature review. The key search terms were urinary incontinence, magnetic stimulation, and female. All known synonyms were used. Results: 255 titles and abstracts were retrieved, and 28 articles met our inclusion criteria. Out of 28 studies, 15 reported no side effects, five reported side effects, and eight did not report anything. There was no significant difference in the incidence of side effects between the sham and active treatment groups. Conclusions: Side effects of magnetic stimulation in comparison to other active treatments are minimal and transient. Among the conservative UI treatment methods, magnetic stimulation is one of the safest methods for the patient and as such a suitable first step in treating UI.

Pelvic Floor Muscle Training versus Functional Magnetic Stimulation for Stress Urinary Incontinence in Women: A Randomized Controlled Trial

BACKGROUND

There is strong evidence that specific pelvic floor muscle training (PFMT) reduces stress urinary incontinence (SUI), but the application of functional magnetic stimulation (FMS) is still under discussion.

OBJECTIVE

To evaluate and compare the effects of FMS and PFMT on pelvic floor muscle function, urinary incontinence symptoms and quality of life (QoL) in women with SUI.

METHODS

A randomized controlled, parallel-group trial was executed in an outpatient physical medicine and rehabilitation centre. The study included 68 women and was fully completed by 48 women (n = 24 in each group) aged 29-49 years, with SUI, who were randomly assigned to PFMT and FMS groups. The symptoms of urinary incontinence and their impact on quality of life were assessed with two questionnaires: the International Consultation on Incontinence Questionnaire-Short Form (ICIQ-SF) and the Incontinence Impact Questionnaire-Short Form (IIQ-7). Perineometer (Pelvexiser) was used to measure the resting vaginal pressure, pelvic floor muscle (PFM) strength and endurance. All outcome measures were taken at baseline and after 6 weeks of interventions. Cohen's effect size (d) was calculated.

RESULTS

A significant improvement (p < 0.05) of ICIQ-SF and IIQ-7 was observed in both groups with a high effect size in the PFMT group (d = 1.56 and d = 1.17, respectively) and the FMS group (d = 1.33 and d = 1.45, respectively). ICIQ-SF and IIQ-7 scores did not differ significantly between groups after the 6-week treatment period. Resting vaginal pressure, PFM strength and endurance increased (p < 0.05) in both groups with a medium (d = 0.52) to large (d = 1.56) effect size.

CONCLUSION

No significant difference between groups was found in any measurement of perineometry. PFMT and FMS significantly improved SUI symptoms and the quality of life of the study participants. None of the applied interventions was superior to the other in the short-term effect.

The Role of Gene Expression in Stress Urinary Incontinence: An Integrative Review of Evidence

Stress urinary incontinence (SUI) is defined as unintentional urine leakage occurring as a consequence of increased intraabdominal pressure due to absent or weak musculus detrusor contractility. It affects postmenopausal women more often than premenopausal and is associated with quality of life (QoL) deterioration. The complex SUI etiology is generally perceived as multifactorial; however, the overall impact of environmental and genetic influences is deficiently understood. In this research report, we have disclosed the upregulation of 15 genes and the downregulation of 2 genes in the genetic etiology of SUI according to the accessible scientific literature. The analytical methods used for the analysis of gene expression in the studies investigated were immunohistochemistry, immunofluorescence staining, PCR, and Western blot. In order to facilitate the interpretation of the results, we have used GeneMania, a potent software which describes genetic expression, co-expression, co-localization, and protein domain similarity. The importance of this review on the genetic pathophysiology of SUI lies in determining susceptibility for targeted genetic therapy, detecting clinical biomarkers, and other possible therapeutic advances. The prevention of SUI with the timely recognition of genetic factors may be important for avoiding invasive operative urogynecological methods.

Secondary urethral sphincter function of the rabbit pelvic and perineal muscles

Perineal and pelvic floor muscles play an important role in continence by providing mechanical support to pelvic organs. It is also known that the pubococcygeus muscle (PcM) contracts in the storage phase and is inactive during voiding, while the bulbospongiosus muscle (BsM) is active during the voiding phase. Recent evidence suggested an additional role of these muscles in supporting urethral closure in rabbits. However, the individual role of perineal and pelvic muscles as urethral sphincters is not well-defined. Here we evaluated the individual, sequential and synergistic roles of the PcM and BsM in assisting urethral closure and defined the optimal electrical stimulation parameters that can effectively contract these muscles and increase the urethral pressure (P _ura ) in young nulliparous animals (n = 11). Unilateral stimulation of either the BsM or PcM at 40 Hz induced modest increases in average P _ura (0.23 ± 0.10 and 0.07 ± 0.04 mmHg, respectively). Investigation on the changes in P _ura evoked by stimulation frequencies between 5 and 60 Hz show that sequential contralateral PcM-BsM activation at 40 Hz induced a 2-fold average P _ura increase (0.23 ± 0.07 mmHg) compared to that evoked by PcM stimulation. Simultaneous activation of PcM and BsM at 40 Hz also showed an increased average P _ura (0.26 ± 0.04 mmHg), with a 2-fold increase in average P _ura observed during the unilateral sequential PcM-BsM stimulation at 40 Hz (0.69 ± 0.2 mmHg). Finally, stimulation at 40 Hz of the bulbospongiosus nerve (BsN) induced an approximate 4-fold increase in average P _ura (0.87 ± 0.44 mmHg; p < 0.04) compared to that elicited by BsM stimulation, confirming that direct nerve stimulation is more effective. Together, this study shows that in the female rabbit, both perineal and pelvic muscles support of the urethral function during continence, and that unilateral stimulation of the BsN at 40-60 Hz is sufficient to achieve maximal secondary sphincter activity. The results also support the potential clinical value of neuromodulation of pelvic and perineal nerves as bioelectronic therapy for stress urinary incontinence.

Efficacy Comparison between Kegel Exercises and Extracorporeal Magnetic Innervation in Treatment of Female Stress Urinary Incontinence: A Randomized Clinical Trial

Background and Objectives: To estimate the effectiveness of Kegel exercises versus extracorporeal magnetic innervation (EMI) in the treatment of stress urinary incontinence (SUI). Materials and Methods: A parallel group, randomized clinical trial was conducted in the Department of Obstetrics and Gynecology, Clinical Hospital Centre Zagreb, Croatia. After assessing the inclusion/exclusion criteria, each eligible participant was randomized to one of the two observed groups by flipping a coin: the first group underwent treatment with Kegel exercises for 8 weeks, while the second group underwent EMI during the same time interval. The primary outcome was the effectiveness of treatment as measured by the ICIQ-UI-SF overall score, eight weeks after the commencement of treatment. Results: During the study period, 117 consecutive patients with SUI symptoms were assessed for eligibility. A total of 94 women constituted the study population, randomized into two groups: Group Kegel (N = 48) and Group EMI (N = 46). After 8 weeks of follow-up, intravaginal pressure values in the EMI group were 30.45 cmH2O vs. the Kegel group, whose values were 23.50 cmH2O (p = 0.001). After 3 months of follow-up, the difference was still observed between the groups (p = 0.001). After the end of treatment and 3 months of follow-up, the values of the ICIQ-UI SF and ICIQ-LUTSqol questionnaires in the EMI group were lower than in the Kegel group (p < 0.001). Treatment satisfaction was overall better in the EMI group than in the Kegel group (p < 0.001). Conclusions: Patients treated with EMI had a lower number of incontinence episodes, a better quality of life, and higher overall satisfaction with treatment than patients who performed Kegel exercises.

Current State of Non-surgical Devices for Female Stress Urinary Incontinence

PURPOSE OF REVIEW

The purpose of this review is to summarize and assess the current non-surgical devices for the treatment of stress urinary incontinence (SUI).

RECENT FINDINGS

Devices for SUI can generally be divided into two categories. One category is the augmentation of pelvic floor muscle training (PFMT), wherein devices such as vaginal cones, intravaginal biofeedback, and electrical or magnetic stimulation are used to strength the pelvic floor musculature, though none are more effective than traditional PFMT. The second category of devices mechanically occludes the outlet and includes incontinence pessaries, intravaginal occlusion devices, and urethral plugs and patches. While these are palliative rather than curative, they share similar rates of improvement in leakage. A number of novel devices exist for the treatment and management of SUI. Though no single device has been shown to be more effective than PFMT alone, they may be beneficial for women who have difficulty isolating their pelvic floor muscles, desire accountability, or prefer technology-based engagement. Outlet occlusion devices are less comfortable for the patient, but remain an option for women who do not desire surgery.

Short-term effect of magnetic stimulation added to bladder training in women with idiopathic overactive bladder: A prospective randomized controlled trial

OBJECTIVE

To evaluate the efficacy of magnetic stimulation (MStim) added to bladder training (BT) on incontinence-related quality of life (QoL) and clinical parameters in women with idiopathic overactive bladder (OAB).

MATERIAL AND METHODS

Seventy-six women with idiopathic OAB were randomized into two groups using the random numbers generator as follows: Group 1 received BT alone (n: 38), and Group 2 received BT + MStim (n: 38). MStim was performed with MStim therapy armchair (Novamag NT60), 2 days a week, 20 min a day, a total of 12 sessions for 6 weeks. Women were evaluated in terms of incontinence severity (24-h pad test), 3-day voiding diary (frequency of voiding, incontinence episodes, nocturia, and number of pads), symptom severity (OAB-V8), QoL (IIQ-7), positive response and cure-improvement rates, and treatment satisfaction (Likert scale) at the baseline and the end of treatment (sixth week).

RESULTS

A statistically significant improvement was found in incontinence severity, frequency of voiding, incontinence episodes, nocturia, number of pads, symptom severity, and QoL parameters for two groups at the end of the treatment compared to the baseline values (p < 0.05). At the end of treatment; incontinence severity, incontinence episodes, nocturia, number of pads, symptom severity, and QoL were significantly improved in Group 2 compared to Group 1 (p < 0.05). No difference was found between the two groups in terms of frequency of voiding (p > 0.05). The positive response and cure-improvement rates, and treatment satisfaction were significantly higher in Group 2 than in Group 1 (p < 0.05).

CONCLUSION

MStim added to BT is more effective than BT alone in women with idiopathic OAB.

Technological Improvement Rates and Evolution of Energy-Based Therapeutics

This paper examines the field of energy-based medical therapies based on the analysis of patents. We define the field as the use of external stimuli to achieve biomedical modifications to treat disease and to increase health. Based upon distinct sets of patents, the field is subdivided into sub-domains for each energy category used to achieve the stimulation: electrical, magnetic, microwave, ultrasound, and optical. Previously developed techniques are used to retrieve the relevant patents for each of the stimulation modes and to determine main paths along the trajectory followed by each sub-domain. The patent sets are analyzed to determine key assignees, number of patents, and dates of emergence of the sub-domains. The sub-domains are found to be largely independent as to patent assignees. Electrical and magnetic stimulation patents emerged earliest in the 1970s and microwave most recently around 1990. The annual rate of improvement of all sub-domains (12-85%) is found to be significantly higher than one we find for an aggregate pharmaceutical domain (5%). Overall, the results suggest an increasingly important role for energy-based therapies in the future of medicine.

Investigation of the effectiveness of magnetic field therapy in women with urinary incontinence: Literature review

OBJECTIVE

Magnetic stimulation (MS) provides a novel strategy for the treatment of urinary incontinence (UI), although its efficacy remains uncertain. This systematic review both evaluated the effects of MS treatment on UI and investigated its impacts on female patients' life quality.

METHODS

A review of the literature that was conducted in EMBASE, PubMed, Google Scholar, and the Cochrane Library (2016-2021) with the search terms; Incontinence of stress OR urge of urination OR Urinary incontinence mixed type. The search was carried out for all randomised controlled trials (RCTs) in English. A manual search has also been conducted for the reference lists of the studies found. Seven studies, with a total of 523 patients (475 patients with SUI), 12 urge urinary incontinence. The study included patients with (UUI) and 36 patients with mixed urinary incontinence (MUI). A total of 10 male patients were excluded from the study. In the included studies, The International Incontinence Questionnaire-Short Form was used to investigate the effects of MS therapy on UI symptoms (ICIQ-SF).

RESULTS

According to the literature review, MS is an effective therapy option for female patients with UI. Still, to establish the efficacy of MS in this area, more large-scale, high-quality RCTs with extended follow-up periods that use consistent stimulation modalities and evaluate comparable outcomes are needed.

CONCLUSION

MS treatment leads to an improvement in the symptoms of UI, in addition to an associated Improved quality of life for patients, without any reported side effects, while the longer-term treatment outcomes must be determined by long-term trials.

The Frequency of Metabolic Syndrome in Aged Female Patients (Older Than 65 Years) With and Without Stress Urinary Incontinence: A Case-Control Study

OBJECTIVE

The aim of the study was to assess the incidence of metabolic syndrome (MetS) in aged patients (older than 65 years) with and without stress urinary incontinence (SUI).

METHODS

We evaluated the components of MetS in 460 SUI patients and 460 age-matched women without urinary incontinence from January 2009 to October 2019. Stress urinary incontinence was diagnosed by clinical complaint and the presence of involuntary urine leakage during physical activity. Definition of MetS was on the basis of the National Cholesterol Education Program Adult Treatment Panel III recommendations definition (NCEPATPIII) and the International Diabetes Federation criteria (IDF).

RESULTS

Totally, 460 SUI patients with the median age of 70 years were eventually included in the study. Subsequently, 460 age-matched controls were selected. The prevalence of MetS was more frequent in SUI patients based on the NCEPATPIII (43.04% vs 19.78%, P < 0.0001) and IDF criteria (45.22% vs 20.22%, P < 0.0001). Moreover, logistic regression analysis revealed that MetS significantly increased the risk of SUI (odds ratio = 3.06, 95% confidence interval = 2.28-4.09) according to the NCEPATPIII definition and (odds ratio = 3.26, 95% confidence interval = 2.43-4.34) on the basis of IDF criteria compared with controls. Patients in the SUI group had a statistically higher body mass index (P < 0.0001), larger waist (P < 0.0001), higher level of fasting blood glucose (P = 0.0001), triglycerides (P = 0.00), and systolic blood pressure (P = 0.0001) than controls. Patients with SUI demonstrated a statistically worse symptom score in all aspects compared with controls (P < 0.0001).

CONCLUSIONS

The prevalence of MetS was higher in older women with SUI than in an age- and sex-matched control group without clinical SUI. Further studies are warranted to determine the pathophysiology mechanism of SUI and MetS.

Effects of Biofeedback-Guided Pelvic Floor Muscle Training With and Without Extracorporeal Magnetic Innervation Therapy on Stress Incontinence: A Randomized Controlled Trial

PURPOSE

We evaluated the effects of biofeedback-guided pelvic floor muscle training (EMG-BF), with and without extracorporeal magnetic innervation (EMG-BF+ExMI) therapy on lower urinary tract symptoms based on frequency of stress urinary incontinence (SUI) and grams of urine loss, health-related quality of life, and sexual function in women with SUI.

DESIGN

This was a randomized controlled trial.

SUBJECTS AND SETTING

The sample comprised 51 adult women with SUI. Their mean age was 50.92 years (SD 8.88). Twenty-six were randomly allocated to EMG-BF alone and 25 were allocated to undergo EMG-BF+ExMI.

METHODS

This study's main outcome was lower urinary tract symptoms measured via the 1-hour pad test (grams of urine loss) and a 3-day bladder diary (frequency of stress incontinence episodes). Additional outcome measures were health-related quality of life measured with the Incontinence Quality of Life (I-QOL) questionnaire, sexual function evaluated via the Female Sexual Function Index (FSFI), and pelvic floor muscle contraction force measured via a perineometer and Modified Oxford Scale (MOS). All participants underwent biofeedback-enhanced pelvic floor muscle training using EMG during 20-minute sessions twice weekly for a period of 8 weeks. In addition to the EMG-BF+ExMI group, ExMI was applied during 20-minute sessions twice weekly for a period of 8 weeks. Participants from both groups were asked to perform pelvic floor muscle exercises at home (60 pelvic floor muscle contractions daily, divided into 3 sessions of 20 contractions each). Outcome measures were made at baseline and repeated at the end of treatment.

RESULTS

Fifteen (57.7%) in the EMG-BF group and 13 (52.0%) in the EMG-BF+ExMI group achieved dryness. Four participants (15.4%) in the EMG-BF group and 5 (20%) in the EMG-BF+ExMI group experienced improvement. Seven patients (26.9%) in the EMG-BF group and 7 (28%) in the EMG-BF+ExMI group did not benefit from the treatments. There was no statistically significant difference between the groups in terms of cure and improvement (P = .895).

CONCLUSIONS

Findings indicate that use of magnetic innervation does not improve lower urinary tract symptoms, health-related quality of life, sexual function, and pelvic floor muscle strength when compared to pelvic floor muscle training alone.

Effects of extracorporeal magnetic stimulation on urinary incontinence: A systematic review and meta-analysis

AIMS

To examine the effectiveness of extracorporeal magnetic stimulation for treatment of stress urinary incontinence.

DESIGN

Systematic review and meta-analysis.

DATA RESOURCES

Four electronic databases from inception to 18 May 2019.

REVIEW METHODS

Two authors independently performed the search, assessed the methodological quality, and extracted data. The final studies included in the analysis were selected after reaching consensus with the third author.

RESULTS

A total of 20 studies were included in the systematic review and 12 of these in the meta-analysis. Quality assessment indicated that only 8 of 17 randomized controlled trials had low risk in overall risk of bias, whereas all controlled trials had serious risk of bias. The weighted mean effect size of magnetic stimulation on quality of life, number of leakages, pad test outcomes, and number of incontinence events was 1.045 (95% CI: 0.409-1.681), -0.411 (95% CI: 0.178-0.643), -0.290 (95% CI: 0.025-0.556), and -0.747 (95% CI: -1.122 to -0.372), respectively. Subgroup analysis revealed a significant difference in the type of quality of life measurement used. Sensitivity analyses revealed that a high degree of heterogeneity persisted even after omitting studies individually.

CONCLUSIONS

Extracorporeal magnetic stimulation may be effective in treating urinary incontinence and improving quality of life without major safety concerns. However, because of a high degree of heterogeneity among studies, inferences from the results must be made with caution.

IMPACT

We recommend that clinical nurses apply extracorporeal magnetic stimulation to treat stress urinary incontinence among female patients and encourage researchers to conduct further qualitative and quantitative studies to develop consistent content and dosage for the intervention.

STUDY REGISTRATION

The review protocol was registered a priori and published online in the PROSPERO database of systematic reviews (www.crd.york.ac.uk/Prospero with the registration number #CRD42019138835).

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.

Current Resources for Evidence-Based Practice, November 2019

A review of new resources to support the provision of evidence-based care for women and infants.