Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...

ICU Acquired Neuromyopathy and Diaphragm Function

This study has been completed.
Information provided by (Responsible Party):
University Hospital, Montpellier Identifier:
First received: August 19, 2013
Last updated: December 2, 2014
Last verified: December 2014

Critical illness neuromyopathy is a common disease acquired during ICU stay leading to a deep weakness involving the respiratory muscle work which result in a delayed weaning of mechanical ventilation.

The main objective is to quantify the loss of diaphragm function by measuring the diaphragm force (using the non invasive method by phrenic nerve stimulation allowing to measure the twitch airway pressure during airway occlusion) in a selected population of patients with critical illness neuromyopathy (defined as a MRC score < 48).

The second end points are to evaluate its incidence, the consequences on the patients outcome (extubation success or failure; ICU stay) and to evaluate the relations between diaphragm function (twitch airway pressure during airway occlusion, maximal inspiratory pressure and diaphragm thickness evaluated by ultrasound) and peripheral limbs force (evaluated by the Medical Research Council - MRC score).

Condition Intervention
Critical Illness Myopathy
Respiratory Paralysis
Other: Non invasive phrenic nerve stimulation

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Diaphragm Function in Patients Acquired Weakness and Neuromyopathy in ICU: Impact on Weaning and Outcome (DIAPH-WEAK ICU)

Resource links provided by NLM:

Further study details as provided by University Hospital, Montpellier:

Primary Outcome Measures:
  • Twitch tracheal pressure during airway occlusion (expressed in cmH2O) [ Time Frame: At the begining of the spontaneous breathing trial ]
    According the standard of care of weaning process; to evaluate the readiness of the patient to be extubated, the setting of the ventilator should be set at 7 cmH20 PRESSURE SUPPORT VENTILATION (PSV) level and zero end expiratory pressure (PEEP=0) during spontaneous mechanical ventilation to mimic the spontaneous breathing trial (SBT).

Secondary Outcome Measures:
  • extubation success (defined as no need reintubation during the 48h after extubation) [ Time Frame: Day 28 after ICU admission ]
    Participants will be followed until Day 28 after ICU admission.

Enrollment: 60
Study Start Date: May 2013
Study Completion Date: November 2013
Primary Completion Date: November 2013 (Final data collection date for primary outcome measure)
Groups/Cohorts Assigned Interventions
Critical illness neuromyopthy
Non invasive phrenic nerve stimulation allowing to measure the twitch airway pressure during airway occlusion
Other: Non invasive phrenic nerve stimulation
Non invasive phrenic nerve stimulation allowing to measure the twitch airway pressure during airway occlusion

Detailed Description:

Diaphragm function will be assessed through phrenic nerve stimulation allowing to measure the twitch airway pressure during airway occlusion (expressed in cmH2O). It will be assessed during a spontaneous breathing trial for each patient with a known critical illness neuromyopathy. The diaphragm (thickness and course) will be studied by ultrasound assessment as well. Peripheral limbs force will be evaluated by the MRC score. A total of 40 analysable patients will be included.

All these measurements will be made at the time of the spontaneous breathing trial (SBT) during the weaning phase. No modification of the clinical practices of the care should be modified by the study. The twitch airway pressure during airway occlusion will be assessed at the begining of the SBT. The other measurements will be performed 30 mn after the SBT if this one will be well tolerated.

Participants will be followed for the duration of ICU stay.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
patients acquired weakness and neuromyopathy in ICU

Inclusion Criteria:

  • MRC score <48
  • ready for weaning from mechanical ventilation

Exclusion Criteria:

  • previous history of neuromyopathy
  • impossibility to perform a magnetic stimulation
  • cervical spine injury
  • bihemispheric or brain stem lesion
  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01968889

Department of Anesthesiology & Critical Care, St Eloi University
Montpellier, France, 34000
Sponsors and Collaborators
University Hospital, Montpellier
Principal Investigator: Samir Jaber, MD PhD University Hospital, Montpellier
  More Information

Responsible Party: University Hospital, Montpellier Identifier: NCT01968889     History of Changes
Other Study ID Numbers: 9163
Study First Received: August 19, 2013
Last Updated: December 2, 2014

Keywords provided by University Hospital, Montpellier:
Critical illness neuromyopathy
Diaphragm dysfunction
Mechanical ventilation

Additional relevant MeSH terms:
Critical Illness
Neuromuscular Diseases
Respiratory Paralysis
Disease Attributes
Pathologic Processes
Neurologic Manifestations
Nervous System Diseases
Signs and Symptoms
Respiratory Insufficiency
Respiration Disorders
Respiratory Tract Diseases processed this record on April 28, 2017