Thyroid Function of Pediatric Subjects Following Isovue® Administration

A Prospective, Multicenter Observational Study to Evaluate Thyroid Function of Pediatric Subjects From Birth to 3 Years Exposed to ISOVUE® (Iopamidol Injection)

This is a Phase IV prospective, multicenter, observational study to estimate the proportion of subjects 0 to 3 years of age who develop abnormal thyroid function after exposure to intravascular administration of ISOVUE for the required radiologic procedure as part of their standard of care.

Study Overview

• Status: Terminated
• Conditions: Hypothyroidism
• Intervention / Treatment: Drug: Isovue

• Study Type: Interventional
• Enrollment (Actual): 17
• Phase: Phase 4

Contacts and Locations

Study Locations

• United States
  • Arizona
    • Phoenix, Arizona, United States, 85016
      • Phoenix Children's Hospital
  • Nebraska
    • Omaha, Nebraska, United States, 68114
      • Children's Hospital and Medical Center
  • Ohio
    • Akron, Ohio, United States, 44308
      • Children's Hospital Medical Center of Akron
  • South Carolina
    • Charleston, South Carolina, United States, 29425
      • Medical University of South Carolina (MUSC)

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: No older than 3 years (Child)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Is male or female from 0 to 3 years of age;
• Is scheduled to undergo a radiologic examination that requires intravascular administration of ISOVUE as part of his/her standard of care;
• Has normal baseline thyroid function tests (TSH, total T3, total T4, and fT4) performed at a local laboratory with blood sample obtained within one week prior to ISOVUE administration;
• Written informed consent is obtained from the subject's parent(s) or legally acceptable representative(s) (according to local regulations) who are willing to comply with the protocol requirements.

Exclusion Criteria:

• Has any known allergy to one or more of the ingredients of ISOVUE;
• Has been diagnosed with congenital hypothyroidism;
• Has undergone radiation treatments to the head or neck;
• Is currently on thyroid replacement therapy;
• Is on therapy with dopamine or any treatment which may affect the thyroid function testing results;
• Has been exposed to any topical iodinated product within 30 days prior to enrollment in the present study;
• Has been exposed to an iodinated contrast agent within 1 year prior to enrollment in the present study, including any administration of iodinated contrast agents during placement of a central line;
• Has any medical condition or other circumstances which would significantly decrease the chances of obtaining reliable data, achieving study objectives, or completing the study and/or post-dose follow-up examinations.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Other
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: ISOVUE; Isovue will be given to all subjects per the standard of clinical care.The specific iodine concentration and volume of ISOVUE used during the radiologic procedure will depend on the type of procedure and the standards in place at the site where the procedure is performed.	Drug: Isovue; Isovue will be given to all subjects per the standard of clinical care.; Other Names: IOPAMIDOL injection

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Abnormal Thyroid Function	The primary outcome of this study was to evaluate the proportion of subjects, 0 to 3 years of age, with abnormal TSH values post-baseline following administration of ISOVUE.	Day 1 (day dosed with intravascular administration of ISOVUE as part of their standard of care examination) to 1-month follow-up or 2-month follow-up

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Hypothyroidism	To evaluate the proportion of subjects, 0 to 3 years of age, with hypothyroidism regardless of the need for thyroid hormone therapy after administration of ISOVUE.	Day 1 (day dosed with intravascular administration of ISOVUE as part of their standard of care examination) to 1-month follow-up or 2-month follow-up
Thyroid Hormone Replacement Therapy	The proportion of subjects initiated on thyroid hormone replacement therapy.	Day 1 (day dosed with intravascular administration of ISOVUE as part of their standard of care examination) to 1-month follow-up or 2-month follow-up to 6- to 12 months follow-up (if applicable)

Collaborators and Investigators

• Sponsor: Bracco Diagnostics, Inc
• Investigators: Study Director: Mary Luigia Storto, MD, Bracco Corporate

Study record dates

Study Major Dates

• Study Start (Actual): March 26, 2019
• Primary Completion (Actual): November 15, 2021
• Study Completion (Actual): March 25, 2022

Study Registration Dates

• First Submitted: December 17, 2018
• First Submitted That Met QC Criteria: December 17, 2018
• First Posted (Actual): December 19, 2018

Study Record Updates

• Last Update Posted (Actual): July 30, 2025
• Last Update Submitted That Met QC Criteria: July 29, 2025
• Last Verified: July 1, 2025

More Information

Terms related to this study

• Keywords: hypothyroidism; ISOVUE; Iodinated Contrast Agent
• Additional Relevant MeSH Terms: Endocrine System Diseases; Thyroid Diseases; Hypothyroidism
• Other Study ID Numbers: IOP-120

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No