Lymphatic Function in Patients With a Fontan Circulation From Brazil

NCT ID: NCT04394507

Last Updated: 2020-05-19

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

48 participants

Study Classification

OBSERVATIONAL

Study Start Date

2018-07-01

Study Completion Date

2019-05-01

Brief Summary

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It is suggested that the elevated central venous pressure in patients with a Fontan circulation can provoke manifestation of lymphatic dysfunction, met as plastic bronchitis, peripheral oedema and most feared protein-losing enteropathy (PLE).

An explorative study from our department at Aarhus University Hospital revealed that the function of the lymphatic vasculature in 10 young Fontan patients with no complications was abnormal compared to healthy controls. However, to further describe and confirm these findings we had to investigate the lymphatic circulation in a larger, older and more complicated group of Fontan patients.

The hypothesis is that, patients with a univentricular circulation have a reduced functionality of the lymphatic vasculature and which predisposes them to developing complications such as edema and PLE.

Detailed Description

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The study population is patients with a Fontan circulation followed at InCor Heart Institute in Sao Paolo and Ribeirão Preto, Brazil. These were matched with and group of healthy controls.

The functional state of superficial lymphatics in the lower leg will be investigated, using near infrared fluorescence (NIRF) imaging. The capillary filtration of fluid and leakiness of the capillaries will be measured using strain gauge plethysmography and the peripheral blood flow will be measured using venous occlusion plethysmography. Furthermore, plasma concentration of noradrenaline will be estimated.

Conditions

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Univentricular Heart Lymphatic Abnormalities Lymphatic Edema

Study Design

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Observational Model Type

CASE_CONTROL

Study Time Perspective

CROSS_SECTIONAL

Study Groups

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Fontan Patients

Fontan patients operated at the two centres between 1991 and 2014.

Near-Infrared Fluorescence imaging

Intervention Type DIAGNOSTIC_TEST

.Near-infrared imaging was used to evaluate the function of the superficial lymphatic vessels in the right lower leg and foot as previously described.doi: 10.1161/CIRCIMAGING.118.008074.

Strain Gauge Plethysmography

Intervention Type DIAGNOSTIC_TEST

Strain Gauge Plethysmography to asses capillary filtration rate og the lower limb

Control Group

Age, gender and weight matched healthy controls.

Near-Infrared Fluorescence imaging

Intervention Type DIAGNOSTIC_TEST

.Near-infrared imaging was used to evaluate the function of the superficial lymphatic vessels in the right lower leg and foot as previously described.doi: 10.1161/CIRCIMAGING.118.008074.

Strain Gauge Plethysmography

Intervention Type DIAGNOSTIC_TEST

Strain Gauge Plethysmography to asses capillary filtration rate og the lower limb

Interventions

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Near-Infrared Fluorescence imaging

.Near-infrared imaging was used to evaluate the function of the superficial lymphatic vessels in the right lower leg and foot as previously described.doi: 10.1161/CIRCIMAGING.118.008074.

Intervention Type DIAGNOSTIC_TEST

Strain Gauge Plethysmography

Strain Gauge Plethysmography to asses capillary filtration rate og the lower limb

Intervention Type DIAGNOSTIC_TEST

Eligibility Criteria

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Inclusion Criteria

* Fontan circulation
* Age above 16.

Exclusion Criteria

* Mental illness
* Syndromes.
Minimum Eligible Age

16 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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InCor Heart Institute

OTHER

Sponsor Role collaborator

Hospital das Clínicas de Ribeirão Preto

OTHER

Sponsor Role collaborator

Rigshospitalet, Denmark

OTHER

Sponsor Role collaborator

University of Aarhus

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Vibeke Hjortdal, MD, PhD, Dmsc

Role: STUDY_DIRECTOR

Rigshospitalet, Denmark

Locations

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Aarhus University Hospital

Aarhus N, Central Jutland, Denmark

Site Status

Aarhus University

Aarhus C, Danmark, Denmark

Site Status

Countries

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Denmark

Other Identifiers

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Fontan Brazil

Identifier Type: -

Identifier Source: org_study_id

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