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A Randomized, Placebo-controlled Trial of Nitrous Oxide During In-office Bladder Botox Injections

A Randomized, Placebo Controlled Trial of Nitrous Oxide/Oxygen Plus Standard Care Versus Standard Care Alone During In-office Intradetrusor onabotulinumtoxinA (Botox) Injections

Status
Not yet recruiting
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07387315
Enrollment
96
Registered
2026-02-04
Start date
2026-02-01
Completion date
2026-12-01
Last updated
2026-02-04

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Neurogenic Bladder, Overactive Bladder, Pain, Pelvic Floor Disorders, Urge Incontinence, Urinary Bladder Neurogenesis, Urinary Bladder, Neurogenic, Urinary Bladder, Overactive, Urinary Incontinence, Urinary Incontinence, Urge

Keywords

Overactive Bladder, Urinary Incontinence, Urge Incontinence, Intradetrusor Injection, OnabotulinumtoxinA, Botox, Bladder Botox, Botulinum Toxins, Type A, Pain Management, Analgesia, Nitrous Oxide, Office-based Procedures, Urogynecology, Pelvic Floor Disorder

Brief summary

The goal of this clinical trial is to assess if a mix of nitrous oxide and oxygen can improve pain control during bladder Botox injections. The primary question it aims to answer is: Does using nitrous oxide lower the overall level of pain during the procedure? Researchers will compare a 50:50 nitrous oxide/oxygen mixture (administered with the Pro-Nox system) plus standard care (with lidocaine in the bladder) to sham mask plus standard care to see if nitrous oxide works better for lowering pain. Participants will: * Receive their bladder Botox injection in the office setting * Either use nitrous oxide/oxygen plus standard care during the procedure, or sham mask plus standard care * Answer brief questions about pain, anxiety, satisfaction, and willingness to repeat the procedure

Detailed description

This study will assess if a 50:50 nitrous oxide and oxygen mixture can lower pain in women undergoing in-office bladder onabotulinumtoxinA (Botox) injections. Many people report pain during this procedure, and pain is a common reason not to repeat the procedure. Nitrous oxide is a fast-acting inhaled analgesic that is used commonly in the office setting. This randomized controlled trial will compare nitrous oxide/oxygen plus standard care with sham mask plus standard care. Participants assigned to the nitrous oxide group will receive nitrous oxide via the Pro-Nox device during the procedure. Both, participants assigned to the nitrous oxide group and the standard care alone group, will receive the usual lidocaine instilled in the bladder for at least 15 minutes. The study will measure participants overall pain during the procedure. It will also assess peak pain, overall anxiety, satisfaction, willingness to repeat, interest in using nitrous oxide in future bladder Botox procedures, and side effects. Nitrous oxide is expected to wear off within minutes, allowing participants to leave the clinic without restrictions. This research study would be first randomized-controlled trial to evaluate nitrous oxide for pain management during this common in-office procedure.

Interventions

DRUGPro-Nox Nitrous Oxide/Oxygen Delivery System

The Pro-Nox system delivers a fixed 50:50 mixture of nitrous oxide and oxygen for patient self-administered inhaled analgesia. Participants will self-administer nitrous oxide throughout the in-office bladder Botox procedure.

DRUGStandard Care for Bladder Botox Injection

Standard care includes intravesical instilled 1-2% lidocaine with a dwell time of at least 15 minutes before the procedure.

The Sham Mask will involve that participant using the same mask as that of the Nitrous Oxide group, but connected to a Pro-Nox system that is turned completely off. They will therefore receive room air through the mask.

Sponsors

TriHealth Inc.
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Subject)

Masking description

The participants will be masked to sham mask versus mask with nitrous oxide/oxygen. Masking of the investigators would not be feasible given the use of participant self-administered inhaled nitrous oxide gas.

Eligibility

Sex/Gender
FEMALE
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Adult women ≥18 years old scheduled for in-office intradetrusor botulinum toxin injection and able to consent.

Exclusion criteria

* Known/suspected vitamin B12 or folate deficiency or high-risk state (e.g., pernicious anemia, malabsorption, post-bariatric or strict vegan without supplementation) * currently pregnant * severe/unstable pulmonary disease or baseline hypoxemia requiring supplemental home oxygen * eye or ear surgery in the last six weeks * trapped-air conditions (e.g., untreated pneumothorax, bowel obstruction) * severe active otitis/sinus disease * inability to follow directions * history of adverse reaction to nitrous oxide

Design outcomes

Primary

MeasureTime frameDescription
Overall Pain (10-point NRS)At least 3 minutes after completion of the procedure.Patient self-reported overall pain during the procedure on an 11-point numeric rating scale.

Secondary

MeasureTime frameDescription
Peak Pain (10-point NRS)At least 3 minutes after completion of the procedure.Patient self-reported peak pain during the procedure on an 11-point numeric rating scale.
Peak Pain TimingAt least 3 minutes after completion of the procedure.Patient self-reported timing of peak pain during the procedure, as it corresponds to different steps during the procedure.
Overall Anxiety (10-point NRS)At least 3 minutes after completion of the procedure.Patient self-reported overall anxiety during the procedure on an 11-point numeric rating scale.
Satisfaction with Pain Management (10-point NRS)At least 3 minutes after completion of the procedure.Patient self-reported satisfaction with pain management during the procedure on an 11-point numeric rating scale.
Willingness to Repeat (5-point Likert)At least 3 minutes after completion of the procedure.Patient self-reported willingness to repeat under similar pain and anxiety management conditions, on a 5-point Likert scale.

Countries

United States

Contacts

CONTACTColton H Mabis, MD
colton_mabis@trihealth.com5134634300

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026