Differences in Radial and Ulnar Artery Size in Young Children

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.

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Key information

Conditions

Surgery

Age range

2 year–9 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Nationwide Children's Hospital

Columbus, Ohio, 43205, United States

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

ASA 1-3 patients undergoing a surgical procedure requiring general anesthesia.

Exclusion criteria

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.

Treatment and study plan

Primary outcomes

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.

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Trial opening soon.

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Sponsors and collaborators

Lead sponsor

Joseph D. Tobias

Other

Registry information

Official study title

Differences in Radial and Ulnar Artery Size in Young Children: Does Hand Dominance Impact the Differences?

Important dates

Study start: 2026
Primary completion: 2029
Study completion: 2029
First posted: Apr 30, 2026
Registry last updated: Sep 9, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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