Suction Catheter. Other methods to enhance cough utilize
negative pressure applied at the mouth or orifice of the
endotracheal tube or tracheostomy tube. The most common
device is a standard suction catheter, which is convenient
when there is a tracheal tube in place. When there
is not, nasotracheal or orotracheal suctioning can be done,
but this is uncomfortable and can lead to trauma to the
nose, pharynx, and larynx. The usefulness of the standard
suction catheter is limited, because it barely reaches the
right main bronchus and does not enter the left main bronchus.
Versions of the catheter that can be turned to enter
the proximal portion of the left main bronchus are not in
common use and are of unproven efficacy. In addition,
each use of a suction catheter introduces bacteria to the trachea
and large bronchi, with the associated risk of infection
Suction Catheter. Other methods to enhance cough utilize
negative pressure applied at the mouth or orifice of the
endotracheal tube or tracheostomy tube. The most common
device is a standard suction catheter, which is convenient
when there is a tracheal tube in place. When there
is not, nasotracheal or orotracheal suctioning can be done,
but this is uncomfortable and can lead to trauma to the
nose, pharynx, and larynx. The usefulness of the standard
suction catheter is limited, because it barely reaches the
right main bronchus and does not enter the left main bronchus.
Versions of the catheter that can be turned to enter
the proximal portion of the left main bronchus are not in
common use and are of unproven efficacy. In addition,
each use of a suction catheter introduces bacteria to the trachea
and large bronchi, with the associated risk of infection
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