This will be a prospective observational study where the investigator will scan patients' necks with an ultrasound and look for anatomical landmarks that may help identify the phrenic nerve.
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To evaluate the number of participants where the investigators will successfully identify the phrenic nerve using only ultrasound and anatomical landmarks
Timeframe: 25-30 minutes
To measure both phrenic nerves depth with an ultrasound in a heterogeneous population in the ICU
Timeframe: 25-30 minutes
To measure the distance, in milimeters, between each phrenic nerve and other homolateral cervical structures such as the carotid artery and the jugular vein
Timeframe: 25-30 minutes