SurgeryNCT07558694
Differences in Radial and Ulnar Artery Size in Young Children
An observational study of Surgery, run by Joseph D. Tobias at 1 site in United States.
Trial summary
This is a prospective observational study that requires measurement of the size of both arteries in both upper extremities using ultrasound. These will be performed after the induction of anesthesia prior to the start of the surgical procedure. Read more about this study
- Who is it for?
- Ages 2 to 9 years
- Conditions the study is for
- Surgery
- How many people
- 100 participants
- Where
- 1 siteUnited States
- Study dates
- Dec 2026to Dec 2029
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 2 to 9 years
- All sexes
- No healthy volunteers
- Child
Study population: Pediatric surgical patients
Who may be able to join
- ASA 1-3 patients undergoing a surgical procedure requiring general anesthesia.
Who cannot join
- Patients with known abnormalities in their vasculature.
- Patients with a previous history of radial/ulnar artery cannulation or puncture.
- Patients with a history of significant upper extremity trauma.
- Patients with a history of congenital abnormalities of the upper extremities.
- Patients with acquired or congenital comorbid conditions known to affect vascular size or development.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
United States1 site
Nationwide Children's Hospital
Columbus, Ohio, 43205
Julie Rice-Weimer, RN, 614-355-3142, Julie.Rice-Weimer@nationwidechildrens.org
Catherine Roth, MPH, Catherine.Roth@nationwidechildrens.org
About this study
Official title: Differences in Radial and Ulnar Artery Size in Young Children: Does Hand Dominance Impact the Differences?
This is a prospective observational study that requires measurement of the size of both arteries in both upper extremities using ultrasound. These will be performed after the induction of anesthesia prior to the start of the surgical procedure.
The primary objective of this study is to evaluate differences in the size of the radial and ulnar artery in a single extremity and then compared to the non-dominant extremity.
- Conditions
- Surgery
What is being measured
The primary outcome is the main question the study is designed to answer.
Radial artery size
The anterior posterior measurement and the lateral measurement of the radial artery in both the dominant and non-dominant arm will be measured using ultrasonography.
Measured: Baseline
Ulnar artery size
The anterior posterior measurement and the lateral measurement of the ulnar artery in both the dominant and non-dominant arm will be measured using ultrasonography.
Measured: Baseline
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted30 Apr 2026
- Study startDec 2026 (estimated)
- Primary completionDec 2029 (estimated)
- Study completionDec 2029 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for SurgeryStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 100 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Joseph D. Tobias
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor-investigator, Joseph D. Tobias, Nationwide Children's Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07558694
- Sponsor's protocol ID
- STUDY00005918
- Status last verified
- Sep 2026
- First submitted
- 17 Apr 2026
- Last updated
- 9 Sep 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 9 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Differences in Radial and Ulnar Artery Size in Young Children: Does Hand Dominance Impact the Differences?
- ClinicalTrials.gov ID
- NCT07558694
- Acronym / sponsor ID
- STUDY00005918
- Conditions
- Surgery
- Study type
- Observational
- Recruitment status
- Not yet recruiting
- Enrolment
- 100 participants (estimated)
- Lead sponsor
- Joseph D. TobiasUniversity, hospital or other
- Study start
- Dec 2026 (estimated)
- Primary completion
- Dec 2029 (estimated)
- Study completion
- Dec 2029 (estimated)
- First posted
- 30 Apr 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This is a prospective observational study that requires measurement of the size of both arteries in both upper extremities using ultrasound. These will be performed after the induction of anesthesia prior to the start of the surgical procedure.
The primary objective of this study is to evaluate differences in the size of the radial and ulnar artery in a single extremity and then compared to the non-dominant extremity.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
Who may qualify
- Ages
- 2 to 9 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child
- Study population
- Pediatric surgical patients
Key inclusion criteria (1 listed)
- ASA 1-3 patients undergoing a surgical procedure requiring general anesthesia.
Key exclusion criteria (5 listed)
- Patients with known abnormalities in their vasculature.
- Patients with a previous history of radial/ulnar artery cannulation or puncture.
- Patients with a history of significant upper extremity trauma.
- Patients with a history of congenital abnormalities of the upper extremities.
- Patients with acquired or congenital comorbid conditions known to affect vascular size or development.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Radial artery size
Time frame: Baseline
The anterior posterior measurement and the lateral measurement of the radial artery in both the dominant and non-dominant arm will be measured using ultrasonography.
Ulnar artery size
Time frame: Baseline
The anterior posterior measurement and the lateral measurement of the ulnar artery in both the dominant and non-dominant arm will be measured using ultrasonography.
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 9 Sep 2026.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Nationwide Children's Hospital
Columbus, United States
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Surgery, run by Joseph D. Tobias at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: opening soon, as of the sponsor's last update on 9 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Each site lists its own contact: choose the nearest one under Trial locations. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Radial artery size (time frame: Baseline). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 9 Sep 2026.