Feasibility of Using Contrast Enhanced Voiding Urosonography (CeVUS) During Urodynamic Studies

Study Overview
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Brief Summary
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The investigators will assess the feasibility of replacing fluoroscopy/iodinated contrast with ultrasound/sulfur hexafluoride lipid-type A microspheres during routine urodynamic studies.

Detailed Description
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Urodynamic studies routinely involve instillation of iohexol (OmnipaqueTM), a low osmolality contrast agent, into the bladder followed by fluoroscopic imaging to assess for reflux or variant anatomy of the genitourinary system. Recently, sulfur hexafluoride lipid-type A microspheres (LumasonTM), an ultrasound contrast agent, has been approved in the United States for intravesicular administration in the pediatric population. Contrast enhanced voiding urosonography (CEvUS) is being increasingly utilized in the place of voiding cystourethrograms, with the major advantages being decreased (zero) radiation for the patient, as well as decreased cost. Given the similarity in procedure between urodynamic studies (UDS) and voiding cystourethrograms, the investigators hypothesize that a urodynamic study may be performed with contrast enhanced ultrasound instead of fluoroscopy. The investigators plan to conduct a small feasibility study by recruiting a group of 30 patients under the age of 18, who are willing to undergo their normally scheduled UDS in addition to CEvUS. The UDS typically consists of two cycles of bladder filling and voiding; the investigators intend to replace the use of fluoroscopy and iohexol with ultrasound and sulfur hexafluoride lipid-type A microspheres. This will decrease the time commitment and eliminate radiation exposure for the patient. There will not be a formal analysis of data as the investigators are planning to test the feasibility of the procedure rather than gather any quantitative data. The goal of the study is to eventually implement CEvUS instead of fluoroscopy in all urodynamic and voiding studies if it is found to be a reasonable alternative. This will decrease pediatric radiation exposure, which will be especially important in the patients undergoing several studies each year.

Official Title
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Feasibility of Using CeVUS During Urodynamic Studies

Conditions
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Neurogenic Bladder

Intervention / Treatment
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* Drug: CeVUS


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age 0-18 Must have had prior urodynamic study at University of Virginia Exclusion Criteria: Pregnant women Fetuses Neonates Prisoners Subjects with preexisting cardiac conditions (such as heart failure and ventricular arrhythmias) Subjects with a known hypersensitivity to Lumason

Ages Eligible for Study
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Maximum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| CeVUS Urodynamic<br>patients undergoing urodynamic study with CeVUS | Drug: CeVUS<br>* Contrast enhanced voiding urosonography<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Participants with successful completion of urodynamics | All usual information gathered during urodynamics was able to be obtained | After enrollment of 30 patients, estimated 1 year | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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contrast ultrasound, urodynamics