We updated the design of this site on September 25th. Learn more.
Show more
ClinicalTrials.gov
ClinicalTrials.gov Menu

Respiratory Variations in the Diameter of the Inferior Vena Cava With Spontaneous Ventilation

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT01644760
First Posted: July 19, 2012
Last Update Posted: March 26, 2015
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
Centre Hospitalier Universitaire de Nīmes
  Purpose
The main objective of this study is to determine a threshold value of diaphragmatic excursion (ultrasound measures: expiration versus inspiration)that best predicts a 50% collapsibility of the inferior vena cava.

Condition Intervention
Collapsibility of the Inferior Vena Cava Procedure: Ultrasounds with controlled breathing

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: Respiratory Variations in the Diameter of the Inferior Vena Cava With Spontaneous Ventilation: A Physiological Study on Healthy Volunteers

Further study details as provided by Centre Hospitalier Universitaire de Nīmes:

Primary Outcome Measures:
  • Collapsibility score for the IVC diameter [ Time Frame: Baseline (Day 0; cross-sectional study) ]

    percentage = ((max-min)/average)*100%

    Three variables are necessary to respond to the primary objective: (the collapsibility score for the IVC diameter; (2) whether or not this score is >= 50%; and (3) a measure of the diaphragmatic excursion.


  • Collapsibility score for the IVC diameter >= 50% (presence/absence) [ Time Frame: Baseline (Day 0; cross-sectional study) ]

    percentage = ((max-min)/average)*100%

    Three variables are necessary to respond to the primary objective: (the collapsibility score for the IVC diameter; (2) whether or not this score is >= 50%; and (3) a measure of the diaphragmatic excursion.


  • Diaphragmatic excursion [ Time Frame: Baseline (Day 0; cross-sectional study) ]

    Maximum distance between the position of the diaphragmatic dome during inspiration versus expiration (cm)

    Three variables are necessary to respond to the primary objective: (the collapsibility score for the IVC diameter; (2) whether or not this score is >= 50%; and (3) a measure of the diaphragmatic excursion.



Secondary Outcome Measures:
  • Collapsibility score for the IVC diameter >= 40% (presence/absence) [ Time Frame: Baseline (Day 0; cross sectional study) ]
    percentage = ((max-min)/average)*100%

  • Collapsibility score for the IVC diameter >= 60% (presence/absence) [ Time Frame: Baseline (Day 0; cross sectional study) ]
    percentage = ((max-min)/average)*100%

  • Mitral Doppler Wave E speed [ Time Frame: Baseline (Day 0; cross sectional study) ]
    cm/s

  • Mitral Doppler Wave A speed [ Time Frame: Baseline (Day 0; cross sectional study) ]
    cm/s

  • Tissue Doppler Wave E' speed [ Time Frame: Baseline (Day 0; cross sectional study) ]
    cm/s

  • Simpson: FEVG [ Time Frame: Baseline (Day 0; cross sectional study) ]

Enrollment: 52
Study Start Date: September 2012
Study Completion Date: September 2012
Primary Completion Date: September 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Study population
Healthy subjects with spontaneous ventilation, 18 to 50 years of age.
Procedure: Ultrasounds with controlled breathing
The patient will have cardiac, abdominal and thoracic ultrasounds with controlled and monitored inspiratory effort. This gesture takes about 40 minutes.

Detailed Description:

Secondary objectives of this study are:

  • to determine a threshold value of diaphragmatic excursion (ultrasound measures: expiration versus inspiration)that best predicts a 40% collapsibility of the inferior vena cava (IVC).
  • to determine a threshold value of diaphragmatic excursion (ultrasound measures: expiration versus inspiration)that best predicts a 100% collapsibility of the IVC.
  • to determine the location of the cutting plane for the TM analysis of collapsibility of the IVC.
  • to evaluate the hemodynamic conditions of normal healthy volunteers.
  • to detect any abnormality of cardiac function.
  Eligibility

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


Ages Eligible for Study:   18 Years to 50 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • The volunteer must have given his/her informed and signed consent
  • The volunteer must be insured or beneficiary of a health insurance plan

Exclusion Criteria:

  • The volunteer is participating in another study
  • The volunteer is in an exclusion period determined by a previous study
  • The volunteer is under judicial protection, under tutorship or curatorship
  • The volunteer refuses to sign the consent
  • It is impossible to correctly inform the volunteer
  • The patient is pregnant, parturient, or breastfeeding
  • The volunteer has known heart disease like heart failure, cardiac arrhythmia
  • The volunteer takes cardiotropics
  • The volunteer has known lung disease: obstructive or restrictive respiratory failure
  • The volunteer has clinical signs of COPD (coughing with morning sputum in a smoking subject)
  • Any emergency situation
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01644760


Locations
France
CHU de Nîmes - Hôpital Universitaire Carémeau
Nîmes Cedex 09, France, 30029
Sponsors and Collaborators
Centre Hospitalier Universitaire de Nīmes
Investigators
Principal Investigator: Laurent Muller, MD Centre Hospitalier Universitaire de Nîmes
  More Information

Responsible Party: Centre Hospitalier Universitaire de Nīmes
ClinicalTrials.gov Identifier: NCT01644760     History of Changes
Other Study ID Numbers: LOCAL/2012/LM-01
2012-A00625-38 ( Other Identifier: RCB number )
First Submitted: July 17, 2012
First Posted: July 19, 2012
Last Update Posted: March 26, 2015
Last Verified: March 2015

Keywords provided by Centre Hospitalier Universitaire de Nīmes:
Diaphragmatic excursion
normality