Voiding Disorders
Conditions
Keywords
Voiding dysfunction, Benign Prostatic Hyperplasia (BPH), Lower urinary tract symptoms (LUTS), Functional Magnetic Resonance Imaging, Urodynamic studies
Brief summary
Benign Prostatic Hyperplasia (BPH) affects the storage and voiding phases of the micturition cycle. Lower urinary tract symptoms (LUTS) refers to storage symptoms such as urinary frequency, urgency, urge urinary incontinence and nocturia. Surgical options for bladder outlet obstruction (BOO), including prostate ablation and transurethral resection, are currently offered for symptomatic improvement. However, 30% of patients report persistent LUTS after BOO procedures. Neuroplasticity induced by BPH and BOO can be contributory of persistent LUTS in these men, having different brain activation patterns during the micturition cycle. The investigators proposed unique multimodal functional Magnetic Resonance Imaging (fMRI) study that will identify for the first time, structural and functional brain contributions to LUTS in men with BPH and BOO at baseline and following BOO procedures. The investigators hypothesize that men with symptomatic BPH who have persistent LUTS following BOO procedures have a distinct brain activation pattern in Regions of Interest (RoI) that regulate the micturition cycle.
Detailed description
The investigators propose a unique, multimodal prospective study that will allow investigators to identify for the first time the structural and functional brain contributions to LUTS in men with BPH and BOO at baseline and post procedure. For this, The investigators will recruit three different groups of patients: Group 1: Patients with BPH and significant improvement in the storage symptoms following BOO procedures. Group 2: Patients with BPH who have persistent storage symptoms following BOO procedures. Group 3 (CONTROL GROUP): Men without LUTS who are planning to undergo radical prostatectomy. Each participant will provide a detailed history, undergo a complete physical examination and will have the following assessments: IPSS, IPSS Quality of life, Incontinence Severity Index (ISI), Patient Global impression of severity (PGI-S) and improvement (PGI-I)19, 20, International Index of Erectile Function (IIEF-5), MRI Safety Screening Questionnaire. A post void residual volume will be measured and a urine sample will be obtained for urinalysis (patients and controls). A two-day bladder diary will also be obtained from the participants. Participants in group 1 and 2 will undergo a clinical urodynamic study within a year prior to the neuroimaging scan. All participants will be followed up at one, three and six months after the BOO procedures (Transurethral resection/ablation of prostate and simple prostatectomy) and radical prostatectomy in the control group. On each visit, the investigators will gather the following data: Uroflow and PVR assessment, bladder diary, and all questionnaires will be repeated in all patients at one, three, and six months. Participants with persistent storage LUTS at six months will have a repeat UDS to ensure BOO is resolved. Group 1 and 2 will undergo simultaneous fMRI/UDS scanning twice during this study: First before BOO procedures and at the second one at six months. The control group will undergo baseline fMRI/UDS. Investigators' established platform for simultaneous urodynamic study and functional MRI scanning will allow investigators to detect structural changes during the micturition cycle. Providing 3D structural images and functional images to have a better understanding of the brain effect on LUTS. By correlating the bold signal changes, structural markers and participant's clinical data, investigators will provide scientific rationale for subsequent studies in the field of neurourology.
Interventions
DIAGNOSTIC_TESTSimultaneous functional MRI and urodynamic studies
Double lumen 7 Fr MRI-compatible catheters will be placed in the bladder and rectum. A Phillips Ingenia 3.0T full body MRI scanner with standard 12 channel head coil will be used. Instructions to communicate using right hand signals representing full urge and voiding or attempt of voiding will be given. Signs will be shown to the patient when filling of the bladder is begun and when filling is stopped. Also, in order to keep our noise-to-signal ratio low, all stimulators including any extra visual stimuli and the UDS machine will be removed from the MRI scanner room. The filling and voiding cycle will be repeated up to 4 times in each patient. Bladder will be aspirated after each voiding. This algorithm will be performed before, and, 3 and 6 months following BOO procedure.
BEHAVIORALQuestionnaires
Each patient will provide a detailed history and undergo a complete physical examination. Each patient will have the following assessments: IPSS and Incontinence Severity Index (ISI), Patient Global impression of severity (PGI-S) and improvement (PGI-I), International Index of Erectile Function (IIEF-5), MRI Safety Screening Questionnaire.
OTHERPost Void Residual (PVR), Uroflow and Bladder Diary
Follow-up assessments: Uroflow and PVR assessment, bladder diary, and all questionnaires will be repeated in all patients at one, three, and six months.
DIAGNOSTIC_TESTUrinalysis
Urine sample
Sponsors
The Methodist Hospital Research Institute
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
MALE
Age
45 Years to 90 Years
Healthy volunteers
No
Inclusion criteria
* Controls (n=13) Men older than 45 years undergoing radical prostatectomy without LUTS * IPSS (International prostate symptom score lower than 12) * Nocturia equal or less than 2 on a two day bladder diary * Group 1 (n=18) Men older than 45 with improved LUTS after 6 months of a BOO procedure and IPSS less than 12 * Improvement in IPSS in at least 3 points for storage symptoms * Nocturia equal or less than 2 on a two day bladder diary * Group 2 (n=9) Men older than 45 with persistent LUTS at six months post BOO procedure * IPSS higher than 8 * Nocturia more than 2 * Delta change in IPSS score less than negative 3 points
Exclusion criteria
* Men with * Neurogenic bladder * Urethral stricture * Prior BOO procedures * History of urinary retention with indwelling foley catheter or intermittent catheterization Additional
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Blood Oxygen Level Dependent (BOLD) signals | 1 year | BOLD signal intensity in the Regions of Interest at the point of full urge at baseline and following Bladder Outlet Obstruction (BOO) procedures in groups 1, 2, and controls. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Fractional Anisotropy (FA) | 1 year | FA; Fractional anisotropy (FA) is a scalar value between zero and one that describes the degree of anisotropy of a diffusion process. A value of zero means that diffusion is isotropic, i.e. it is unrestricted (or equally restricted) in all directions. No units. |
| Mean Diffusivity (MD) | 1 year | Mean diffusivity of Anterior Thalamic Radiation (ATR) and Superior Longitudinal Fasciculus (SLF) white matter tracts in groups 1,2, and controls. MD is a scalar value between zero and one that describes the degree of diffusivity. No units. |
| Uroflow measure | 1 year | Maximum Qmax of urine (ml/sec): The range is between 0-40 ml/ sec. |
| Postvoid Residual | 1 year | Postvoid Residual (PVR) of urine in mL: The range is between 0-900 ml. |
| Urinary symptoms scores | 1 year | Urinary symptoms scores (no unit): The range is between 0-35 |
Countries
United States
Outcome results
None listed