Clinical Study | Open Access
Yung-Chin Lee, Shu-Mien Chuang, Kun-Ling Lin, Wei-Chiao Chen, Jian-He Lu, Kuang-Shun Chueh, Mei-Chen Shen, Li-Wen Liu, Cheng-Yu Long, Yung-Shun Juan, "Low-Intensity Extracorporeal Shock Wave Therapy Ameliorates the Overactive Bladder: A Prospective Pilot Study", BioMed Research International, vol. 2020, Article ID 9175676, 9 pages, 2020. https://doi.org/10.1155/2020/9175676
Low-Intensity Extracorporeal Shock Wave Therapy Ameliorates the Overactive Bladder: A Prospective Pilot Study
Objective. In the present clinical trial, we evaluated the therapeutic effects of low-intensity extracorporeal shockwave therapy (LiESWT) on overactive bladder (OAB). Methods. Female subjects with ages of 20-75 years and who have been clinically diagnosed with OAB were included in the study. The LiESWT (DUOLITH SD1 T-TOP, AG) applicator was placed on the suprapubic skin area and applied with an intensity of 0.25 mJ/mm2, 3000 pulses, and 3 pulses/second. To assess the therapeutic efficacy, all subjects were required to complete the validated OAB symptoms and life bothersome questionnaires, 3-day urinary diary, uroflowmetry, and post-voided residual urine (PVR) measurement at 4 weeks of LiESWT (W4), 8 weeks of LiESWT (W8), 1-month follow-up (F1), and 3-month follow-up (F3) after LiESWT. Result. 82 subjects with the mean age of were enrolled. The questionnaire scores were significantly improved at W4, W8, F1, and F3 as compared to baseline data (W0). At W8, the mean values of functional bladder capacity were meaningfully increased. According to the 3-day urinary diary, daytime frequency, urgency, and nocturia were significantly decreased. The uroflowmetry results showed that the mean voided urine volume and the maximal flow rate () were noticeably increased. PVR volume was also significantly decreased. Conclusions. The data demonstrated that 8-week LiESWT ameliorated the OAB symptoms, promoted the uroflow parameters, and improved the quality of life (QoL) in OAB patients, suggesting that LiESWT might serve as an alternative noninvasive therapy for OAB.
An overactive bladder (OAB) is a prevalent condition, which can seriously reduce overall quality of life (QoL). It is a major financial burden on healthcare with prevalence rates of 16-17%. In Asian countries, human epidemiology studies revealed that the prevalence of female OAB is 20.9% and is age-dependent; it increases to 34.5% in those who are over the age of 65 [1–3]. The physiological basis of these symptoms is detrusor overactivity. Previous studies revealed that hypoxia, oxidative stress, and a decrease of blood supply play a role in pathophysiology of OAB symptoms [4, 5]. Changes in bladder innervation, a disproportionate increase of prostaglandin by muscarinic as well as purinergic receptors, and leukotriene production may also be involved in the development of OAB [6, 7].
Currently, there are some treatment options available for OAB patients. The clinically used medical treatment for OAB includes antimuscarinic agents and/orβ3 agonist medication [8, 9]. However, the use of medication, especially anticholinergic agents, is frequently accompanied with adverse effects, such as dry mouth, constipation, and blurred vision. Side-effects of β3 agonist medication agents include changes in blood pressure, dizziness, and somnolence [8, 9]. Whenever medication treatment fails, invasive treatment with intravesical botulinum toxin A injection and posterior tibial nerve stimulation (PTNS) or sacral neuromodulation (SNM) are considered as third-line treatment [10, 11]. The effect of botulinum toxin A is to block the presynaptic release of acetylcholine from the parasympathetic efferent nerve. However, the efficacy might have some effects on altering the afferent nerve input, which results in acute urinary retention, large post-void residual (PVR) (>150 ml), and gross hematuria . Although PTNS and SNM present a safer and short-term improvement, both are invasive procedures which need accurate needle puncture into the proper position . Moreover, it takes 3 months to determine the success of PTNS . As a result of these findings, the current therapies for OAB are still limited in that they are designed to mitigate symptoms rather than treat the underlying pathology. Moreover, the side-effects of the therapies are the major cause for the low persistent rate of medical treatment. Therefore, finding an alternative treatment, especially a nonmedical and less invasive therapy without disturbing adverse effects, is of utmost important for OAB patients.
Low-intensity extracorporeal shockwave therapy (LiESWT) has been used as a clinical treatment modality in many types of diseases, including myocardial infarction, heart failure , bone fracture, tendinopathy , and skin ischaemia . LiESWT has also been proven to be an effective and safe treatment for various urological disorders, including chronic pelvic pain syndrome (CPPS) [17–21] and erectile dysfunction (ED) [22–26]. Clinically, LiESWT (0.10-0.25 mJ/mm2, 3000 pulses, once/week, 4 weeks) improves pain score, bladder voiding, and QoL and could be considered as a treatment strategy for CPPS. Moreover, the therapeutic effects of LiESWT (0.10-0.25 mJ/mm2, 3000-6000 pulses, once/week, 4-8 weeks) for ED patients increased penile hemodynamics and induced penile tissue regeneration. A systemic review revealed that LiESWT can improve erectile function, as measured by the International Index of Erectile Function (IIEF) and Erectile Hardness Score (EHS) .
Recently, our group showed that LiESWT can significantly improve the visual analog scale (VAS) pain score and total international prostate symptom scores (IPSS) for men with CPPS refractory to 3-As therapy (antibiotics, alpha-blockers, and anti-inflammatories). The response can last until the 3-month follow-up . To date, the clinical efficacy of LiESWT on patients with OAB has not previously been investigated. Our research was the first clinical study to investigate the therapeutic effect of LiESWT on OAB. We hypothesized that LiESWT could ameliorate detrusor overactivity by attenuating the inflammatory responses of the bladder, which consequently could alleviate OAB symptoms. The aim of this study was to evaluate the effect of LiESWT on clinical symptoms, urodynamic parameter, and QoL of OAB subjects.
2. Materials and Methods
2.1. Eligibility of Subject
This clinical trial was a prospective pilot study, which was performed with the approval of the institutional review board of a tertiary medical center (Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; clinical trial registration No. KMUHIRB-F(II)-20180010). This study was also registered at ClinicalTrials.gov (NCT04059133), and the date of registration was August 16, 2019. Eligible participants were recruited from the outpatient clinics and provided informative consent before participating in the study. All participants had a complete medical history and physical examination. This study included female subjects (participants) aged 20-75 years who were diagnosed with OAB for more than 3 months, such as , , , or . Major exclusion criteria are as follows: (1) urinary tract infection (UTI) at screening period or recurrent UTI (defined as ≥3 UTIs in the previous 3 months); (2) neuropathic diseases; (3) history of urolithiasis or urologic cancer; (4) lower urinary tract surgery in the last 6 months; (5) severe cardiopulmonary disease, coagulopathy, and liver or renal dysfunction; (6) gross hematuria; (7) significant bladder outflow obstruction; (8) previous pelvic radiation therapy; and (9) drug or nondrug treatments of OAB in the previous 3 months. No other urinary-related treatments were permitted during the study and follow-up periods. Women who are pregnant or within six months of childbearing are also excluded from the study.
2.2. Medical Information of LiESWT
The instrumentation was the DUOLITH SD1 T-TOP focused shock wave system (Storz Medical AG). The LiESWT was applied with an intensity 0.25 mJ/mm2, the , and a frequency of 3 pulses/second as modified from previous reports . Participants were required to rest on a treatment couch for 15 minutes before treatment. Experienced urologists and gynecologists gently placed the applicator on the suprapubic skin area over the bladder dome (1000 impulses) and over the bilateral bladder walls (each side 1000 impulses). The probe was placed on the lower abdomen with two fingers apart from the pubic symphysis, tilting to 45° (Figure 1).
2.3. Physical and Serum Biochemical Parameters of Study Subjects
The physical and serum parameters of metabolic syndrome were associated with the symptoms of OAB. Physical indicators were collected, including height, weight, waistline, body mass index (BMI), and blood pressure. Additionally, serum biochemical parameters were examined, including hemoglobin A1c (glycated hemoglobin; HbA1c), blood sugar before meals, renal function index (blood urea nitrogen (BUN)), liver function index (glutamate oxaloacetate transaminase (GOT), glutamate pyruvate transaminase (GPT)), and lipid profile (triglycerides, cholesterol, low-density lipoprotein (LDL), and high-density lipoprotein (HDL)) to investigate the baseline characteristics of the OAB population.
2.4. Uroflowmetry and Measurement of PVR Urine Volume
Uroflowmetry served as a noninvasive screening test. Before LiESWT, uroflowmetry and PVR amount were checked to rule out voiding dysfunction. For uroflowmetry, voided urine volume and maximum flow rate () were recorded. The amount of PVR was calculated by the Verathon BladderScan BVI 9400 (Radiance Medical Systems, Kuala Lumpur, Malaysia). Uroflowmetry and PVR helped to identify subjects in need of further evaluation and to evaluate treatment effect during follow-up.
2.5. Therapeutic Efficacy Assessment for LiESWT
The researchers received training on instrument operation, diagnostic confirmation, disease activity assessment, data key in, and data quality control. To analyze the therapeutic efficacy assessment for LiESWT, the primary endpoint was changed in the questionnaire scores, and the secondary endpoints were changed in the 3-day urinary diary and uroflowmetry at baseline (W0), 4 weeks (W4) of LiESWT, 8 weeks (W8) of LiESWT, 1-month follow-up (F1), and 3-month follow-up (F3) after LiESWT. The completed 3-day urinary diary chart will provide subjects’ information about average fluid intake, urine output, functional bladder capacity, daytime frequency, urgency, and nocturia over a period of three days. Moreover, validated questionnaires included the overactive bladder questionnaire short form (Overactive Bladder Symptom Scores (OABSS)) , International Consultation on Incontinence Questionnaire-Short Form (ICIQ-SF) , Urogenital Distress Inventory-6 (UDI-6-) Short Form, and Incontinence Impact Questionnaire-7 (IIQ-7) score . Uroflowmetry and PVR measurement were also performed to assess the urodynamic parameters at W0, W4, W8, F1, and F3. The primary endpoint was the mean change in OAB symptoms and urodynamic parameters from baseline to the end of treatment.
2.6. Statistical Analysis
Questionnaires, uroflowmetry, and 3-day urinary diary were used to assess the efficacy of the pre- and posttreatments performed with LiESWT on OAB subjects. Quantitative data were represented as (SE). In order to clarify the effect of LiESWT therapy on OAB, we compared the pre- and posttreatment scores (W4 vs. W0, W8 vs. W0, F1 vs. W0, and F3 vs. W0) for an intragroup of patients, not between groups of patients. Therefore, a paired -test was used to perform a repeated measurement analysis for an intragroup before/after treatment and to calculate values for comparison [32, 33] in a single-arm clinical trial of the current study. For all statistical analyses, was considered to be statistically significant. All statistical analyses were performed using SAS 9.3 (SAS Institute, Cary, NC, USA).
3.1. Characteristics of Study Subjects
The physical indicators and biochemical parameters of the OAB subjects were summarized in Table 1. The mean age of the enrolled 82 subjects was . The percentages of subjects with daytime frequency and nocturia were 100%. The percentages of subjects with urgency and urgency incontinence were 90% and 63% in Figure 2(a). All subjects completed treatment and follow-up periods.
Note: BMI: body mass index; MAP: mean arterial pressure; HbA1c: hemoglobin A1c (glycated hemoglobin); AC: ante cibum (before meals); BUN: blood urea nitrogen; GOT: glutamate oxaloacetate transaminase; GPT: glutamate pyruvate transaminase; HDL: high-density lipoprotein; LDL: low-density lipoprotein. Values are . .
3.2. LiESWT Improved 3-Day Urinary Diary
The analysis of the 3-day urinary diary was characterized in Figure 2(b) and Table 2. There was no significant difference in the amount of fluid intake and urine output among different visits. However, the mean values of functional bladder capacity were noticeably increased from to at W8. LiESWT also showed a significant increase in the average voided volume at W8, F1, and F3. With regards to OAB symptoms, the daytime frequency values were meaningfully decreased from (W0) to (W4) and (W8). Nocturia was significantly decreased from (W0) to (W8). The mean times of the urgency were decreased from (W0) to (W8). Moreover, all the mean values of daytime frequency, urgency, and nocturia remained significantly decreased at F1 and F3.
Note. SE: standard error; W: week; W4: once per week, 4 weeks of LiESWT; W8: once per week, 8 weeks of LiESWT; F1: 1-month follow-up; F3: 3-month follow-up; OABSS: overactive bladder symptom scores. Values are . ; vs. W0. .
3.3. LiESWT Improved Uroflowmetry Parameters and PVR
The analysis of urodynamic parameters was determined using uroflowmetry (voided urine volume and ) and PVR as shown in Table 2. In the uroflowmetry study, the mean of voided urine volume (ml) were meaningfully increased from (W0) to (W4) and (W8). The mean of (ml/sec) was significantly increased from (W0) to (W8). The PVR (ml) also had a significant decrease from (W0) to (W8). Moreover, the mean of voided urine volume and PVR remained noticeably improved at F1 and F3. These results indicated that eight weeks of LiESWT caused significant improvements in voided urine volume, , and PVR.
3.4. LiESWT Improved OAB Symptoms and QoL
After 8 weeks of LiESWT, the OAB symptoms and bothersome questionnaire scores (OABSS, ICIQ-SF, UDI-6, and IIQ-7) were investigated (Table 2 and Figure 3). The OABSS score was noticeably decreased from (W0) to (W4) and (W8). The ICIQ-SF score was significantly decreased from (W0) to (W4) and (W8). The UDI-6 score was decreased from the baseline (W0) to (W4) and (W8). The IIQ-7 score was decreased from the baseline (W0) to (W4) and (W8). All the questionnaire scores (OABSS, ICIQ-SF, UDI-6, and IIQ-7) remained significantly decreased at F1 and F3. Our results indicated that eight weeks of LiESWT caused significant improvements in OAB symptoms and QoL.
According to the subgroups of OABSS (Table 2 and Figure 3(b)), daytime frequency was significantly decreased from (W0) to (W4) and (W8). Nocturia was meaningfully decreased from (W0) to (W4) and (W8). The mean time of the urgency was decreased from the baseline (W0) to (W4) and (W8). The mean time of the urgency incontinence was decreased from the baseline (W0) to (W4) and (W8). All the subgroups of OAB symptom scores remained significantly decreased at F1 and F3.
3.5. Safety of LiESWT Treatment
In this study, treatments were well tolerated by the subjects. No significant adverse effects associated with LiESWT, such as intolerable pain, hematuria, or skin ecchymosis, were reported from subjects.
3.6. Short Graphic Abstract of Study Proposed for Potential Effect of LiESWT
The above findings led to the suggestion of a model to postulate the potential effect of LiESWT on OAB, as shown in Figure 4. The LiESWT was applied with a 0.25 mJ/mm2 intensity, 3000 pulses of shocks, and a frequency of 3 pulses/second, and was placed on the lower abdomen with two fingers apart from the pubis, tilting the probe to 45°. The results revealed that LiESWT reduced the symptoms of OAB, including urinary incontinence, urgency, frequency, and nocturia after 8 weeks of treatment, which brought significant improvement in QoL.
LiESWT has been clinically used in the treatment of many diseases, but the therapeutic effect of LiESWT on OAB had never been explored. The present investigation was the first clinical study to demonstrate that 8 weeks of LiESWT treatment could ameliorate OAB symptoms; improve the urodynamic parameters, such as voided urine volume, , and PVR; and increase functional bladder capacity, which brought significant improvement in QoL (Figure 4).
LiESWT has been used clinically for several years in urology, but the efficacy and safety profile of LiESWT in treating OAB are not completely clear. For the CPPS studies, the shock intensity ranging from 0.10 to 0.25 mJ/mm2, 3000 impulses, and once/week treatment continuing for 4 weeks were used to treat the disease [17–19]. The results showed that LiESWT improved the pain score, bladder urination, and QoL without side-effects. On the other hand, ED studies were treated with 0.10-0.25 mJ/mm2, 3000-6000 pulses, and once per week treatment continuing for 4-8 weeks [22–24, 34]. Evidences suggested that LiESWT treatment induced penile tissue regeneration and increased penile hemodynamics. Gruenwald et al. determined the efficacy of LiESWT in severe ED patients who were poor responders to PDE5i therapy, and their results suggested that LiESWT significantly improved the symptoms . In our study, the recruited subjects had normal physical and serum parameters, thus eliminating potential confounding factors (Table 1). Our findings demonstrated that OAB symptoms and QoL had persistent improvement at W8, F1, and F3 after LiESWT treatment (0.25 mJ/mm2, 3000 pulses, 3 pulses/second, and once/week); however, the effectiveness of different treatment intervals and frequencies must be further evaluated in order to determine the optimal treatment protocol of LiESWT for OAB patients.
The molecular mechanism underlying the therapeutic effect of LiESWT is still unclear, but it is difficult to obtain bladder tissues in clinical trials. Hence, investigating the molecular mechanism of the therapeutic effect of LiESWT through animal experiments is necessary. Zhang et al. reported that the shock intensity ranging from 0.10 to 0.13 mJ/mm2 and the shock number ranging from 200 to 300 impulses were the optimal parameters for LiESWT to increase angiogenetic factors and decrease inflammation mediators . In rats with cyclophosphamide-induced acute interstitial cystitis , LiESWT (200 impulses at 0.11 mJ/mm2) was found to improve bladder overactivity through inducing angiogenesis, inhibit the production of reactive oxygen species (ROS), and lessen oxidative stress. Wang et al. reported that LiESWT was applied for 4 weeks once a week using a 0.02 mJ/mm2 energy flux density at 3 Hz for 400 pulses which ameliorated diabetic bladder dysfunction and urinary incontinence in a streptozotocin-induced diabetic rat. These studies indicated that LiESWT ameliorated bladder wall composition, enhanced bladder and urethra muscle contractile function, increased bladder nerve innervation, activated bladder muscle regeneration, and promoted urethra continence . Another study was on diabetic bladder dysfunction also induced by streptozotocin, which showed that LiESWT (300 impulses at 0.1 mJ/mm2, 3 times/week, 4 weeks) enhanced nerve innervation and vascularization of the bladder, and improved bladder function, such as daytime frequency, urine volume per void, and PVR in endogenous stem cells .
It is well known that the lower urinary tract symptom is related to female sexual function. Females with an overactive bladder and urinary incontinence had a worsened sexual life, decreased sexual desire, and loss of arousal [39, 40]. From previous literature, estrogen supply can not only improve the symptoms of an overactive bladder and urinary incontinence but also increase sexual life [40–42]. In our study, LiESWT had an obvious benefit on lower urinary tract symptoms. Therefore, LiESWT might play an important role in treating female sexual dysfunction, especially in combination with estrogen therapy in postmenopausal women. This is a new topic worthy of further research.
Due to the lack of molecular investigations, the present study could not provide evidence about the potential therapeutic mechanisms of the effect of LiESWT on OAB. However, our results provided new insights into potential therapies, which might lead to a new alternative treatment for OAB patients. It should be pointed out that the current study had several limitations. First, it was a prospective pilot study, which lacked control or comparison with other types of therapy. Second, the patient number was limited; hence, a comparison of the efficacy of LiESWT with different symptoms of OAB was not feasible. Third, the follow-up period was short, only one month and 3 months; hence, the long-term and persistence of efficacy after LiESWT treatment could not be evaluated. Fourth, only female participants were included in this study, so the therapeutic efficacy of LiESWT on male subjects may require further research.
The present study showed that 8 weeks of LiESWT could ameliorate the OAB symptoms, improve QoL, and enhance urodynamic parameters of OAB patients. LiESWT might serve as a new potential noninvasive alternative therapy in patients with OAB. Further larger and longer-term investigations are needed to validate the results in the present study and to optimize the therapeutic efficacy of LiESWT on OAB.
The data used to support the findings of this study are included within the article.
The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Conflicts of Interest
The authors have declared that no competing interests exist.
Y.C.L., S.M.C., K.L.L., W.C.C., J.H.L., K.S.C., M.C.S., L.W.L., C.Y.L., and Y.S.J. conceived and designed the study. Y.C.L., S.M.C., K.L.L., W.C.C., J.H.L., K.S.C., C.Y.L., and Y.S.J. conducted the review and edited the manuscript. Y.C.L., S.M.C., K.L.L., W.C.C., J.H.L., C.Y.L., and Y.S.J. had full access to all the data in the study and took responsibility for the integrity of the data and the accuracy of the data analysis. Y.C.L., S.M.C., K.L.L., W.C.C., J.H.L., C.Y.L., and Y.S.J. wrote the paper. All authors reviewed and approved the final manuscript. Cheng-Yu Long and Yung-Shun Juan contributed equally to this work.
We are grateful to Professor Chang-Hwei Chen of the University at Albany, State University of New York, for his valuable comments on this manuscript. This research is supported by grants from the Ministry of Science and Technology (MOST 105-2314-B-037-043-MY3 (Yung-Shun Juan), MOST 107-2314-B-037-008 (Yung-Chin Lee), MOST 107-2314-B-037-103 (Kun-Ling Lin), and MOST 106-2314-B-037-083 (Cheng-Yu Long)), in part by the Department of Medical Research, Kaohsiung Medical University Hospital (KMUH-104-4R45 (Yung-Shun Juan), KMUH-105-5R44 (Yung-Shun Juan), KMUH-106-6R60 (Yung-Shun Juan), and KMUH-107-7R60 (Yung-Chin Lee)), in part by Kaohsiung Municipal Hsiao-Kang Hospital (Kmhk-106-008 (Yung-Chin Lee), Kmhk-107-024 (Cheng-Yu Long), and Kmhk-108-007 (Yung-Chin Lee)), and by the Ministry of Health and Welfare (MOHW107-TDU-B-212-123006 (Yung-Shun Juan) and MOHW108-TDU-B-212-133006 (Yung-Shun Juan)).
- Y. C. Chen, S. C. Ng, S. L. Chen, Y. H. Huang, S. W. Hu, and G. D. Chen, “Overactive bladder in Taiwanese women: Re-analysis of epidemiological database of community from 1999 to 2001,” Neurourology and Urodynamics, vol. 31, no. 1, pp. 56–59, 2012.
- A. A. Al-Zahrani and J. Gajewski, “Urodynamic findings in women with refractory overactive bladder symptoms,” International Journal of Urology, vol. 23, no. 1, pp. 75–79, 2016.
- J. C. Jenks, “Overactive bladder in women,” Nursing Standard, vol. 31, no. 9, pp. 52–63, 2016.
- H. Masuda, K. Kihara, K. Saito et al., “Reactive oxygen species mediate detrusor overactivity via sensitization of afferent pathway in the bladder of anaesthetized rats,” BJU International, vol. 101, no. 6, pp. 775–780, 2008.
- K. M. Azadzoi, T. Tarcan, R. Kozlowski, R. J. Krane, and M. B. Siroky, “Overactivity and structural changes in the chronically ischemic bladder,” Journal of Urology, vol. 162, no. 5, pp. 1768–1778, 1999.
- N. Yoshimura, Y. Kaiho, M. Miyazato et al., “Therapeutic receptor targets for lower urinary tract dysfunction,” Naunyn-Schmiedeberg's Archives of Pharmacology, vol. 377, no. 4-6, pp. 437–448, 2008.
- K. M. Azadzoi, V. M. Shinde, T. Tarcan, R. Kozlowski, and M. B. Siroky, “Increased Leukotriene and Prostaglandin Release, and Overactivity in the Chronically Ischemic Bladder,” Journal of Urology, vol. 169, no. 5, pp. 1885–1891, 2003.
- M. C. Schiavi, P. Faiano, O. D'Oria, M. A. Zullo, L. Muzii, and P. Benedetti Panici, “Efficacy and tolerability of treatment with mirabegron compared with solifenacin in the management of overactive bladder syndrome: A retrospective analysis,” Journal of Obstetrics and Gynaecology Research, vol. 44, no. 3, pp. 524–531, 2018.
- D. J. Lightner, A. Gomelsky, L. Souter, and S. P. Vasavada, “Diagnosis and Treatment of Overactive Bladder (Non-Neurogenic) in Adults: AUA/SUFU guideline Amendment 2019,” Journal of Urology, vol. 202, no. 3, pp. 558–563, 2019.
- B. Orasanu and S. T. Mahajan, “The use of botulinum toxin for the treatment of overactive bladder syndrome,” Indian Journal of Urology, vol. 29, no. 1, pp. 2–11, 2013.
- T. Marcelissen, J.-N. Cornu, T. Antunes-Lopes et al., “Management of Idiopathic Overactive Bladder Syndrome: What Is the Optimal Strategy After Failure of Conservative Treatment?” European Urology Focus, vol. 4, no. 5, pp. 760–767, 2018.
- W. Zhang, X. Deng, C. Liu, and X. Wang, “Intravesical treatment for interstitial cystitis/painful bladder syndrome: a network meta-analysis,” International Urogynecology Journal, vol. 28, no. 4, pp. 515–525, 2017.
- A. S. El-Azab and S. W. Siegel, “Sacral neuromodulation for female pelvic floor disorders,” Arab Journal of Urology, vol. 17, no. 1, pp. 14–22, 2019.
- M. Myojo, J. Ando, M. Uehara, M. Daimon, M. Watanabe, and I. Komuro, “Feasibility of Extracorporeal Shock Wave Myocardial Revascularization Therapy for Post-Acute Myocardial Infarction Patients and Refractory Angina Pectoris Patients,” International Heart Journal, vol. 58, no. 2, pp. 185–190, 2017.
- J. P. Furia, J. D. Rompe, N. Maffulli, A. Cacchio, and C. Schmitz, “Radial Extracorporeal Shock Wave Therapy Is Effective And Safe In Chronic Distal Biceps Tendinopathy,” Clinical Journal of Sport Medicine, vol. 27, no. 5, pp. 430–437, 2017.
- R. Mittermayr, J. Hartinger, V. Antonic et al., “Extracorporeal Shock Wave Therapy (Eswt) Minimizes Ischemic Tissue Necrosis Irrespective of Application Time And Promotes Tissue Revascularization by Stimulating Angiogenesis,” Annals of Surgery, vol. 253, no. 5, pp. 1024–1032, 2011.
- R. Zimmermann, A. Cumpanas, F. Miclea, and G. Janetschek, “Extracorporeal Shock Wave Therapy For The Treatment Of Chronic Pelvic Pain Syndrome In Males: A Randomised, Double-Blind, Placebo-Controlled Study,” European Urology, vol. 56, no. 3, pp. 418–424, 2009.
- A. Moayednia, S. Haghdani, S. Khosrawi, E. Yousefi, and B. Vahdatpour, “Long-term effect of extracorporeal shock wave therapy on the treatment of chronic pelvic pain syndrome due to non bacterial prostatitis,” Journal of Research in Medical Sciences : The Official Journal of Isfahan University of Medical Sciences, vol. 19, no. 4, pp. 293–296, 2014.
- S. J. Guu, J. H. Geng, I. T. Chao et al., “Efficacy Of Low-Intensity Extracorporeal Shock Wave Therapy on Men With Chronic Pelvic Pain Syndrome Refractory To 3-As Therapy,” American Journal of Men's Health, vol. 12, no. 2, pp. 441–452, 2018.
- P. Yuan, D. Ma, Y. Zhang et al., “Efficacy of low-intensity extracorporeal shock wave therapy for the treatment of chronic prostatitis/chronic pelvic pain syndrome: a systematic review and meta-analysis,” Neurourology and Urodynamics, vol. 38, no. 6, pp. 1457–1466, 2019.
- S. J. Guu, C. C. Liu, Y. S. Juan, C. C. Li, and C. C. Tsai, “The 12-month follow-up of the low-intensity extracorporeal shockwave therapy in the treatment of patients with chronic pelvic pain syndrome refractory to 3-As medications,” The Aging Male, pp. 1–8, 2019.
- E. Chung and J. Wang, “A state-of-art review of low intensity extracorporeal shock wave therapy and lithotripter machines for the treatment of erectile dysfunction,” Expert Review of Medical Devices, vol. 14, no. 12, pp. 929–934, 2017.
- E. Chung and R. Cartmill, “Evaluation of clinical efficacy, safety and patient satisfaction rate after low-intensity extracorporeal shockwave therapy for the treatment of male erectile dysfunction: an Australian first open-label single-arm prospective clinical trial,” BJU International, vol. 115, Supplement 5, pp. 46–49, 2015.
- R. I. Clavijo, T. P. Kohn, J. R. Kohn, and R. Ramasamy, “Effects of Low-Intensity Extracorporeal Shockwave Therapy on Erectile Dysfunction: A Systematic Review and Meta-Analysis,” The Journal of Sexual Medicine, vol. 14, no. 1, pp. 27–35, 2017.
- L. Dong, D. Chang, X. Zhang et al., “Effect of Low-Intensity Extracorporeal Shock Wave on the Treatment of Erectile Dysfunction: A Systematic Review and Meta-Analysis,” American Journal of Men's Health, vol. 13, no. 2, p. 1557988319846749, 2019.
- I. Sokolakis and G. Hatzichristodoulou, “Clinical studies on low intensity extracorporeal shockwave therapy for erectile dysfunction: a systematic review and meta-analysis of randomised controlled trials,” International Journal of Impotence Research, vol. 31, no. 3, pp. 177–194, 2019.
- Z. Lu, G. Lin, A. Reed-Maldonado, C. Wang, Y. C. Lee, and T. F. Lue, “Low-Intensity Extracorporeal Shock Wave Treatment Improves Erectile Function: A Systematic Review and Meta-Analysis,” European Urology, vol. 71, no. 2, pp. 223–233, 2017.
- C. J. Wang, “An overview of shock wave therapy in musculoskeletal disorders,” Chang Gung Medical Journal, vol. 26, no. 4, pp. 220–232, 2003.
- Y. Homma, M. Yoshida, N. Seki et al., “Symptom assessment tool for overactive bladder syndrome—overactive bladder symptom score,” Urology, vol. 68, no. 2, pp. 318–323, 2006.
- A. Tubaro, F. Zattoni, D. Prezioso et al., “Italian validation of the International Consultation on Incontinence Questionnaires,” BJU International, vol. 97, no. 1, pp. 101–108, 2006.
- J. S. Uebersax, J. F. Wyman, S. A. Shumaker, D. K. McClish, J. A. Fantl, and Continence Program for Women Research Group, “Short forms to assess life quality and symptom distress for urinary incontinence in women: The incontinence impact questionnaire and the urogenital distress inventory,” Neurourology and Urodynamics, vol. 14, no. 2, pp. 131–139, 1995.
- S. S. ÖZBERK, H. GÜNDOĞAR, M. ÖZKAYA, İ. L. TANER, and K. ERCIYAS, “The effect of photobiomodulation therapy on nonsurgical periodontal treatment in patients with type 2 diabetes mellitus: a randomized controlled, single-blind, split-mouth clinical trial,” Lasers in Medical Science, vol. 35, no. 2, pp. 497–504, 2020.
- J. L. Rosario, “Relief from back pain through postural adjustment: a controlled clinical trial of the immediate effects of muscular chains therapy (MCT),” International Journal of Therapeutic Massage & Bodywork: Research, Education, & Practice, vol. 7, no. 3, pp. 2–6, 2014.
- I. Gruenwald, B. Appel, and Y. Vardi, “Low-Intensity Extracorporeal Shock Wave Therapy—A Novel Effective Treatment For Erectile Dysfunction In Severe ED Patients Who Respond Poorly To PDE5 Inhibitor Therapy,” The Journal of Sexual Medicine, vol. 9, no. 1, pp. 259–264, 2012.
- X. Zhang, X. Yan, C. Wang, T. Tang, and Y. Chai, “The dose-effect relationship in extracorporeal shock wave therapy: the optimal parameter for extracorporeal shock wave therapy,” The Journal of Surgical Research, vol. 186, no. 1, pp. 484–492, 2014.
- Y. T. Chen, C. C. Yang, C. K. Sun et al., “Extracorporeal shock wave therapy ameliorates cyclophosphamide-induced rat acute interstitial cystitis though inhibiting inflammation and oxidative stress-in vitro and in vivo experiment studies,” American Journal of Translational Research, vol. 6, no. 6, pp. 631–648, 2014.
- H. S. Wang, B. S. Oh, B. Wang et al., “Low-intensity extracorporeal shockwave therapy ameliorates diabetic underactive bladder in streptozotocin-induced diabetic rats,” BJU International, vol. 122, no. 3, pp. 490–500, 2018.
- Y. Jin, L. Xu, Y. Zhao, M. Wang, X. Jin, and H. Zhang, “Endogenous Stem Cells Were Recruited by Defocused Low-Energy Shock Wave in Treating Diabetic Bladder Dysfunction,” Stem Cell Reviews, vol. 13, no. 2, pp. 287–298, 2017.
- D. Robinson, P. Toozs-Hobson, and L. Cardozo, “The effect of hormones on the lower urinary tract,” Menopause International, vol. 19, no. 4, pp. 155–162, 2013.
- M. C. Schiavi, V. Sciuga, A. Giannini et al., “Overactive bladder syndrome treatment with ospemifene in menopausal patients with vulvovaginal atrophy: improvement of sexuality?” Gynecological endocrinology : the official journal of the International Society of Gynecological Endocrinology, vol. 34, no. 8, pp. 666–669, 2018.
- M. C. Schiavi, M. A. Zullo, P. Faiano et al., “Retrospective analysis in 46 women with vulvovaginal atrophy treated with ospemifene for 12 weeks: improvement in overactive bladder symptoms,” Gynecological endocrinology : the official journal of the International Society of Gynecological Endocrinology, vol. 33, no. 12, pp. 942–945, 2017.
- M. C. Schiavi, O. D’Oria, N. Aleksa et al., “Usefulness of ospemifene in the treatment of urgency in menopausal patients affected by mixed urinary incontinence underwent mid-urethral slings surgery,” Gynecological Endocrinology, vol. 35, no. 2, pp. 155–159, 2019.
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