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Clinical Trial Details — Status: Withdrawn

Administrative data

NCT number NCT01744210
Other study ID # DOP081412
Secondary ID
Status Withdrawn
Phase N/A
First received December 2, 2012
Last updated June 24, 2014
Start date September 2012
Est. completion date July 2015

Study information

Verified date August 2012
Source Echosense Ltd.
Contact n/a
Is FDA regulated No
Health authority United States: Food and Drug Administration
Study type Observational

Clinical Trial Summary

Historically, transthoracic Doppler echocardiography has been unable to provide interpretable data of blood flow within the lung parenchyma because of air attenuation of Doppler signals. Recently, a transthoracic Doppler system known as the Sonara/tek Transcranial Doppler (TCD) System has been developed that can identify parenchymal pulmonary blood flow (PPBF) signals. The ability to non-invasively collect information regarding the pulmonary aspect of the cardio-pulmonary system may provide valuable information and new insights into the structural and functional characteristics of the lung parenchyma and vasculature in health and disease states.


Description:

This new system was previously studied among 31 healthy volunteers and one subject with atrial fibrillation.1 Pulsed spectral Doppler signals were obtained over the chest wall using a signal processing and algorithm package in conjunction with a non-imaging Doppler device coupled with an electrocardiogram. Clear reproducible lung Doppler signals (LDS) originating from different elements and phases of cardiac activity that generate mechanical waves which propagate throughout the lung were expressed in pulsatile changes in ultrasound reflections.

After the completion of the first 25 patients in our pilot study, we have received some valuable information. After assessing patients with CHF and pulmonary hypertension, we identified signals particular to the CHF group. There were unique features that were never observed in the normal patients. On top of the regular Lung Doppler signals seen in normal patients, high velocity "disorganized" variable signals that were not synchronous with the heart beat, but rather sometimes with respiration were observed. We believe that the signals may represent popping open of small bronchi surrounded by "water filled" parenchyma. These events that generate very strong reflector like signals may represent the movement of fluid at the blood vessel-alveolar air junction.


Recruitment information / eligibility

Status Withdrawn
Enrollment 0
Est. completion date July 2015
Est. primary completion date April 2015
Accepts healthy volunteers Accepts Healthy Volunteers
Gender Both
Age group 50 Years and older
Eligibility Inclusion Criteria:

- Inclusion criteria

1. Age over 50 years

2. Belongs to one of the following categories:

A. Decompensated CHF: patients with overt pulmonary congestion or pulmonary edema on admission, evident both clinically and by chest x-ray. Patients may be with or without a Swan-Ganz catheter.

B. Compensated CHF: patients with significant CHF (NYHA II-IV) who are well controlled and without evidence of pulmonary congestion or pulmonary edema on admission.

C. Non-CHF controls: patients without CHF and without any of the following: pulmonary hypertension, any known pulmonary disease, uncontrolled hypertension.

3. Signed Informed Consent

Exclusion Criteria:

- Chronic obstructive pulmonary disease (COPD) Asthma Interstitial lung disease Any other obstructive or restrictive lung diseases Pneumonia- currently or in the past 3 months prior to inclusion Current or past pulmonary embolism Non-cardiogenic pulmonary edema or lung injury (e.g. ARDS) Right sided pleural effusion that is not mild Severe kyphosis, scoliosis or chest wall deformity

Study Design

Observational Model: Cohort, Time Perspective: Prospective


Related Conditions & MeSH terms


Locations

Country Name City State
United States NSLIJ Lenox Hill hospital, 100East 77 Street New-York New York

Sponsors (1)

Lead Sponsor Collaborator
Echosense Ltd.

Country where clinical trial is conducted

United States, 

Outcome

Type Measure Description Time frame Safety issue
Primary Diagnose specific patterns of doppler signals in CHF patients Comparing Doppler signals' features as velocity, power, timimg, slopes and other between CHF patients and non-CHF patients. Participants will be followed up for the duration of hospital stay, usuall up to 1 week. December 2013 No
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