RCT Comparing Intravaginal Laser Therapy to Sham in Post-menopausal Women with Recurrent Urinary Tract Infections (UTIEXTERMINATE)

A Single-blinded, Randomised Controlled Trial Comparing the Use of Intravaginal Laser Therapy to Sham in Post-menopausal Women with Recurrent Urinary Tract Infections (rUTI) and the Impact on the Vaginal and Urinary Microbiome

Recurrent urinary tract infection (rUTI) is a common and difficult to treat problem with limited treatment option; postmenopausal women are disproportionately affected. The genitourinary syndrome of menopause (GSM) describes the broad spectrum of signs and symptoms caused by the loss of endogenous sex steroids. The combined effects of urogenital epithelial tissue thinning and changes to the vaginal and bladder microbiome can predispose to ascending UTIs. Recurrent UTIs is a component of GSM.

Intravaginal laser therapy has been shown to be safe and effective for the treatment of GSM, however, the role of laser for treatment of recurrent UTIs is unknown. We hypothesis that the incidence of UTI will be reduced as CO2 laser restores vaginal epithelium to a state similar to that of a pre-menopausal woman, preventing microtrauma, and increases Lactobacillus and normal flora (Athanasiou et al., 2016). Lactobacillus is considered the bacteria that helps keep the vagina healthy and infection free through its production of lactic acid which lowers vaginal pH, this more acidic environment may be protective from uropathogens.

We therefore aim to conduct a single-blinded, multi-centre, randomised controlled trial comparing the use of intravaginal CO2 laser therapy to sham in post-menopausal women with rUTIs and to determine the impact on the microbiome.

Study Overview

• Status: Active, not recruiting
• Conditions: Recurrent Urinary Tract Infection; Genitourinary Syndrome of Menopause
• Intervention / Treatment: Device: Deka SmartXide Touch C60 (MonaLisa Touch); Device: Sham

Detailed Description

Urinary tract infections (UTIs) are the most common outpatient infection with a prevalence of 20% in women over 65, compared with 11% in the overall population (Chu and Lowder, 2018).

The genitourinary syndrome of menopause (GSM) is the accepted term used to describe the broad spectrum of genitourinary tract symptoms and signs caused by the loss of endogenous sex steroids that occurs at the time of and after the menopause. Global improvements in healthcare have resulted in an aging population. Today women are spending 40% of their lives in the postmenopausal state with 50-70% of postmenopausal women reporting symptomatic GSM. The combined effects of urogenital epithelial tissue thinning and changes to the vaginal and bladder microbiome can predispose to ascending UTIs. Recurrent UTIs is a component of GSM.

Current interventions for recurrent urinary tract infections in women include lifestyle and behavioural advice, complimentary therapies and antibiotics. These treatment regimens are not always effective or acceptable. Intravaginal Laser therapy is an alternative non-hormonal treatment of GSM as it stimulates tissue repair and restores normal vaginal function.

Currently intravaginal laser therapy has been shown to be safe and effective for the treatment of GSM, as described in a recent network analysis of 29 randomised controlled studies, incorporating 8311 patients (Li et al., 2021). Provisional results using FemTouch®, fractional CO2 laser, appear promising with 9/12 (75%) of post-menopausal women UTI free at 12 months follow-up (Yang and Foley). However, there is a scarcity of studies available looking at the impact of this novel technology for the treatment of recurrent UTIs.

The investigators aim to conduct a single-blinded, randomised controlled trial comparing the use of intravaginal CO2 laser therapy to sham in post-menopausal women with rUTIs and to determine the impact on the microbiome. The investigators hypothesise that this treatment will be effective in reducing the incidence of urinary tract infection as CO2 laser through a process of thermomodulation, simulates tissue repair by restoring vaginal epithelium to a state similar to that of a pre-menopausal woman. In addition, a study assessing the effect of micro-ablative functional CO2 laser reported an increase in Lactobacillus and normal flora (Athanasiou et al., 2016). Lactobacillus is considered the bacteria that helps keep the vagina healthy and infection free through its production of lactic acid which lowers the vaginal pH, this more acidic environment may be protective from uropathogens. The role and impact of Laser on other microbial communities is still not fully understood, this study aims to expand this knowledge base.

Recurrent UTIs is a common and difficult to treat problem with limited treatment options, this study endeavors to expand the knowledge pool and provide alternative non-pharmacological options using this novel technology.

• Study Type: Interventional
• Enrollment (Actual): 48
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United Kingdom
  • London, United Kingdom, SE5 9RS
    • King's College Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Child; Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Postmenopausal women
• History of recurrent UTI (Defined as women who have suffered at least three episodes of symptomatic UTI within the preceding 12 months or two episodes in the last six months, or at least one episode of UTI requiring hospitalisation, or if previously prescribed prophylactic antibiotics for UTI, have completed a 3-month washout period without antibiotic prophylaxis)
• Able to give informed consent for participation in the trial
• Able and willing to adhere to a 17-month study period

Exclusion Criteria:

• Not willing to abstain from vaginal intercourse for 48 hours following laser-therapy
• Use of vaginal hormonal therapy in the three months before study start
• History of a genital fistula, a thin recto-vaginal septum as determined by the investigator or history of a fourth-degree laceration during physical screening exam (e.g., deficient perineal body)
• Active sexually transmitted disease upon vaginal exam (as determined by the investigator) that precludes treatment or any other vaginal infection
• History of lichen sclerosis
• History of radiotherapy for cervical or uterine cancer
• A medical condition that may interfere with participants' compliance with the protocol
• Women with correctable urinary tract abnormalities that are considered to be contributory to the occurrence of rUTI
• Women taking Methenamine Hippurate and unable to undergo a three-month washout period
• Undiagnosed genital bleeding
• Women who self-catheterise, or have an indwelling/suprapubic catheter
• Unable to give informed consent

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Single

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Treatment Arm; Intravaginal micro-ablative fractional CO2 laser technology Deka SmartXide Touch C60 (MonaLisa Touch) will be administered intravaginally over a course of 5 cycles	Device: Deka SmartXide Touch C60 (MonaLisa Touch); Intravaginal micro-ablative fractional CO2 laser technology Deka SmartXide Touch C60 (MonaLisa Touch)
Sham Comparator: Control Arm; Sham treatment -Participants receiving sham treatment will have the probes advanced in the same manner without the use of a laser energy device.	Device: Sham; Participants receiving sham treatment will have the probes advanced in the same manner without the use of a laser energy device.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
To determine and compare the incidence of symptomatic antibiotic-treated UTI during the 6-month follow-up period after completion of allocated treatment	Determined from the UTI history diary and cross-referenced with hospital and GP records	6 months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
UTI history diary	Participants will be given a UTI history diary to complete which will documents all symptomatic and treated UTI, the diary will be cross-referenced with participant history and review of medical history at each follow-up appointment.	18 months
Vaginal Health Index Score (VHIS)	o It incorporates a clinical examination of the vagina for pH, elasticity, fluid volume, epithelial integrity, moisture. Vaginal pH will be obtained using a piece of litmus paper placed on the lateral wall of the vagina.	18 months
King's Health Questionnaire (KHQ)	21 items about urinary tract symptoms yield scores in 9 domains (general health perception, incontinence impact, role limitations, physical limitations, social limitations, personal relationships, emotions, sleep/energy & severity of symptoms).	18 months
International Consultation on Incontinence Questionnaire - Female Lower Urinary Tract Symptoms (ICIQ-FLUTS)	A 12 item questionnaire for evaluating female lower urinary tract symptoms	18 months
International Consultation on Incontinence Questionnaire - Vaginal Symptoms (ICIQ-VS)	A 14 item questionnaire for evaluating vaginal symptoms, associated sexual matters and impact on quality of life (QoL)	18 months
10 cm Visual Analogue Scale for Symptoms (VAS)	Consists of a 10cm line, used to determine intensity of symptoms with two endpoints representing 0 ("no symptoms" and 10 ("symptom at the worse it could be"). Symptoms assessed: vaginal dryness, dyspareunia, itching, burning, dysuria, frequency, urgency, overall symptoms	18 months
Urinary Tract Infection Symptom Assessment Questionnaire (UTISA)	14-item questionnaire asking about the severity and bothersome of seven key UTI symptoms.	18 months
Female Sexual Function Index Scoring (FSFI)	A 19 item questionnaire designed to measure sexual functioning in women.	18 months
Health Service Utilisation Questionnaire (HSU-Q)	An instrument for the standardized and systematic assessment of various aspects of health care utilisation	18 months
Treatment satisfaction questionnaire for laser (TSQ-L)	A modified 10-item questionnaire used to determine participant satisfaction with treatment	18 months
Vulvoscopic Genital Tissue Appearance Scale (VGTA)	assesses 10 parameters of the appearance of the genital tissue including loss of labia minora/majora, decreased glans clitoris, stenosis of introitus, prominence of the urethral meatus, vestibular pallor, vestibular pallor, vesicular erythema, loss of vaginal rugae, loss of vestibular moisture and loss of prominence of the anterior vaginal wall. A score of 0 to 30 is obtained, the higher the score the worse the vulvoscopic genital tissue appearance	18 months
Adverse event recording	Adverse events will be asked at each visit and participant will have contact details to reports any throughout the study period	18 months
Dipstick urine analysis	Reagent strips used to detect substances in urine including nitrate, leucocytes, glucose, protein, pH, ketones and blood	18 months
Standard urine culture	Routine urinalysis that identify bacteria or yeast causing a urinary tract infection	18 months
Expanded Quantitative Urine Culture (EQUC)	- EQUC uses larger urine volume, longer incubation times, multiple growth media and atmospheric conditions and enables species-level identification	18 months
16S rRNA rapid Next-generation Gene Sequencing	16S rRNA NGS provide gene-level information for species. It utilises PCR amplification and NGS of essential 16S ribosomal RNA genes. It enables the evaluation of even closely related bacterial species through evolutionary polymorphisms	18 months
Shotgun metagenomic sequencing	allows the identification and profiling of microbial species independent of reference sequences.	18 months

Collaborators and Investigators

• Sponsor: King's College Hospital NHS Trust

Study record dates

Study Major Dates

• Study Start (Actual): October 1, 2023
• Primary Completion (Estimated): October 8, 2026
• Study Completion (Estimated): October 8, 2026

Study Registration Dates

• First Submitted: September 6, 2022
• First Submitted That Met QC Criteria: November 6, 2023
• First Posted (Actual): November 9, 2023

Study Record Updates

• Last Update Posted (Actual): March 25, 2025
• Last Update Submitted That Met QC Criteria: March 5, 2025
• Last Verified: March 1, 2025

More Information

Terms related to this study

• Keywords: Microbiome; UTI; Laser; Genitourinary Syndrome of Menopause; CO2 Laser; Recurrent Urinary Tract Infection
• Additional Relevant MeSH Terms: Urogenital Diseases; Pathologic Processes; Male Urogenital Diseases; Urologic Diseases; Female Urogenital Diseases; Female Urogenital Diseases and Pregnancy Complications; Disease Attributes; Recurrence; Infections; Communicable Diseases; Urinary Tract Infections
• Other Study ID Numbers: 302037

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED
• IPD Plan Description: Will be available at request

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No