Reduction of Topical Anesthetic Onset Time Using Ultrasound

Reduction of Topical Anesthetic Onset Time Using Ultrasound: A Randomized Controlled Trial Prior to Venipuncture in Young Children

Status

Completed

Phases

Phase 4

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT00126932

Enrollment

Registered

2005-08-05

Start date

2004-10-31

Completion date

2004-12-31

Last updated

2007-12-27

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

Conditions

Pain

Brief summary

Children ages 3-7 who are undergoing blood drawing receive either standard care, topical medicine for numbing (LMX4), or the study intervention which utilizes ultrasound to speed the onset of LMX4 from 30 minutes to 5 minutes. The child's pain with the blood drawing procedure is evaluated.

Interventions

DEVICESonoPrep

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

3 Years to 7 Years

Healthy volunteers

Inclusion criteria

* Ages 3-7, requiring venipuncture

Exclusion criteria

* Emergent procedure * Allergy to lidocaine or sodium lauryl sulfate

Design outcomes

Primary

Measure	Time frame
pain associated with venipuncture	—

Secondary

Measure	Time frame
safety	—
skin effects	—
tolerability	—

Countries

United States

Outcome results

None listed

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