Clinical trial NCT03983044: Comparison of Two Methods for Assessing Cough Capacity in Intensive Care Unit After Cardiac Surgery
Official title: Comparison of Two Methods for Assessing Cough Capacity in Intensive Care Unit After Cardiac Surgery: Parietal Ultrasound vs. Peak Expiratory Cough Flow
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Intensive Care Unit
Cardiac Surgery
Keywords: cough evaluation
intensive care unit
utrasound evaluation
Lead sponsor: Centre Chirurgical Marie Lannelongue
Sponsor class: OTHER
First posted: 2019-06-12
Enrollment: 44
Sex: ALL
Minimum age (years): 18
Maximum age (years): 100
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: CASE_ONLY
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Patient admitted to intensive care, intubated after cardiac surgery by sternotomy.

Brief summary: Weaning from mechanical ventilation represents 50% of the time spent under mechanical ventilation (1). The risk factors identified in the failure to wean from mechanical ventilation are:

* left heart dysfunction with LVEF \< 30%.
* an ineffective cough
* presence of resuscitation neuromyopathy
* mechanical ventilation time \>7 days
* presence of a delirium
* age \>65 years old
* abundant bronchial secretion
* presence of underlying lung pathology An ineffective cough is found in 40% of patients requiring reintubation. However, cough assessment is most often approximate, based on a subjective assessment of cough strength by asking the patient to cough spontaneously on his or her tube).

The objective evaluation of cough is based on the measurement of the peak expiratory flow rate at cough, commonly referred to as peak expiratory flow rate at cough (PEFD), the patient is asked to take a deep breath and then cough as hard as possible.

Subjective cough assessment does not predict the occurrence of ventilatory withdrawal failure. Conversely, all studies that objectively assessed the strength of cough before extubation by measuring the PEFD found a significant association with the outcome of extubation: a low PEFD increases the risk of extubation failure by a factor of 5 to 9.

The investigators hypothesize that the increase in parietal abdominal muscle contraction obtained by using a non-invasive ultrasound method indicates an effective cough. Conversely, an ineffective cough can be detected by this simple ultrasound criterion, which can be performed at the patient's bedside and extrapolated to all intensive care units equipped with an ultrasound scanner. This evaluation will be carried out before extubation: during the spontaneous ventilation test on a tube in a half-seated position (\>45°) and within 24 hours after extubation.


Eligibility criteria: Inclusion Criteria:

* Major patients admitted for intubated resuscitation, ventilated after sternotomy cardiac surgery and having a mechanical ventilation time of less than 48 hours.

Exclusion Criteria:

* Pregnant patient
* Recent history of stroke(\<6 months )
* Minor patient
* Neurological disorder (Alzheimer's disease, delirium, confusion)
* Emphysemal patient

Primary outcomes:
measure: parietal ultrasound
timeFrame: 48 hours
measure: peak expiratory flow rate
timeFrame: 48 hours
Secondary outcomes:
Other outcomes:
Locations:
city: Le Plessis-Robinson
country: France
facility: Centre Chirurgical Marie Lannelongue
Study officials:
References: