Anesthesia Clinical Trial
Because of its simplicity of function and reliability, direct laryngoscopy it is routinely
used for endotracheal intubation during general anesthesia. However, direct laryngoscopy is
fraught with concerns for cardiovascular stimulation during induction of general anesthesia.
This can be attributed to the placement of the laryngoscope blade into the vallecula and
then applying force in an upward direction to expose the glottic opening. The average force
necessary for visualization of the glottic opening is approximately 5.4kg. This can lead to
significant pressor responses and tachycardia though stimuli to supraglottic region.
An alternative airway management device is the Shikani optical stylet (SOS). It is an
effective, safe and reusable intubation device that has been shown to be effective in cases
of difficult intubation. It consists of a fiberoptic bundle within a J - shaped malleable
stainless steel sheath. At the proximal end of the sheath is an eyepiece with an attachment
to a light source. An adjustable "tube stop" firmly affixes the endotracheal tube to the
stylet, and has a port to be able to deliver oxygen. (4) The operator inserts the tip of the
stylet with the loaded endotracheal tube into the patient's oropharynx and under direct
visualization through the eyepiece, is able to visualize the vocal cords. Because the end of
the stylet is at the end of the endotracheal tube, it can be directly visualized to be
entering trachea past the vocal cords.
The investigators hypothesize that endotracheal intubation performed by the aid of SOS by
minimizing oropharyngolaryngeal stimulation will result in fewer hemodynamic changes in
patients with normal airways as compared with the MacIntosh laryngoscope.
n/a
Allocation: Randomized, Endpoint Classification: Safety Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Treatment
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