Use of Amplified Sound Signal to Identify Presence of Carotid and Femoral Stenosis

Status

Terminated

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT01599195

Enrollment

Registered

2012-05-15

Start date

2010-04-30

Completion date

2017-01-31

Last updated

2017-02-01

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

Conditions

Carotid Bruit Asymptomatic, Carotid Murmur, Carotid Stenosis, Femoral Arterial Stenosis

Keywords

carotid stenosis, femoral artery ischemia, carotid bruit asymptomatic, carotid murmur

Brief summary

The purpose of the study is to test a new amplified stethoscope(AudioDoc) that can detect the presence of bruit by using an acoustic signal to represent the bruit. This pilot study will address two questions: is there a detectable difference in recorded sound signal of carotid and femoral bruit when compared to sound signals captured when there is no bruit present; is the use of a visual recorded signal more accurate in identifying carotid and femoral bruit when compared to traditional auscultation with a regular stethoscope and ultrasound.

Detailed description

Recorded signals are stored on a laptop computer. The signals later undergo Fourier analysis are then compared to the findings on carotid ultrasoud as to degree of stenosis. Subjects with high grade stenosis in which no bruit was ascultated but in which carotid ultrasound data suggests a bruit may be present are studied for soft /inaudible bruits. When available, data will be correlated to CT/conventional angiographic studies.

Interventions

DEVICEAudioDoc

AudioDoc will be used to identify the carotid and femoral bruit

Study design

Observational model

CASE_ONLY

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

19 Years to 90 Years

Healthy volunteers

Yes

Inclusion criteria

* age 19-90 years * having clinical ultrasound evaluation of carotid or femoral artery

Exclusion criteria

* under age 19; over age 90 years

Design outcomes

Primary

Measure	Time frame
Comparison of bruit signal obtained from the amplified stethoscope(AudioDoc) to that found by conventional ultrasonography.	subjects will be followed for duration of hospital stay, typically four days.

Secondary

Measure	Time frame
To assess the frequency spectral differences obtained from the different recording modalities	duration of hospital stay, typically four days

Countries

United States

Outcome results

None listed

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