 |
|
 |
 |
 |
 |
||||||||||||||
|
 |
Direct Laryngoscopy Stylet Shaping
A straight-to-cuff stylet shape has a narrower long-axis dimension compared to an arcuate shaped stylet (or tube without a stylet)
The stylet should be straight throughout the length of the tube until the proximal cuff. The tip of the stylet should stop before the Murphy eye at the distal end of the tube. This prevents the stylet from excessively stiffening the distal tip, and also prevents possible injury that could result from the stylet extending beyond the tube.
On insertion into the mouth, a straight-to-cuff tube is initially positioned behind the maxilla, and is not visible. Using the right corner of the mouth the tube can be pivoted to come up from below the line of sight, and over the posterior laryngeal landmarks, into the larynx.
The straight-to-cuff bend point is at the proximal cuff, and should not exceed 35 degrees. In a large cadaver study performed at Dr. Levitan’s Baltimore cadaver courses, angles above 35 degrees had significantly greater problems with advancement into the trachea. At 45 degrees, 11% of tracheal tubes did not advance, and at 60 degrees, more than half of tubes could not be inserted.
The mechanical impediment to tube advancement results from the interaction of the tube tip with the anterior tracheal rings, and the fact that the trachea itself is a relatively small pipe through which the tube moves.
If there is resistance to tube insertion, a clockwise (rightward) turn will lower the leading edge of the tube (disengaging it from the rings). Additionally, withdrawing the stylet will allow the tube to have greater flexibility.
Parker tracheal tubes have a ski-tip design to their distal tip. This symmetric, soft-tipped tube does not have the same mechanical issues with the tracheal rings as left-facing beveled tubes.
Click Here for more information about Parker tracheal tubes and other aspects of tube design
|
|
Copyright 2011 Airway Cam Technologies, Inc. All Rights Reserved.
DISCLAIMER: The procedures discussed at this website, to be performed properly, rely on complex medical skills and should only be undertaken after formal instruction and hands-on clinical training with appropriate supervision, and after receiving professional certification and authorization to do so. The content presented herein is meant to serve as just one of many resources that trainees and health care professionals should consult in the course of the their skill acquisition and ongoing practice. Airway Cam Technologies, Inc., its authors, officers, agents and assigns, disclaim any and all responsibility for any adverse outcomes and or harmful acts committed by others persons who may have consulted this website or relied on information contained herein.
Home • About Airway Cam • Dr. Richard Levitan • FAQs • Calendar • Links • Contact Us • LEARN: Laryngeal Anatomy • Laryngeal Pathology • Emergency Airway Management • Laryngoscopy/Intubation Equipment • Tracheal Tube Design and Delivery • Techniques for Oral Intubation • Techniques for Nasal Intubation • Search •
TRAIN: Overall Approach to Airway Training • Teaching Anatomy • Practicing Mechanics of Intubation • Airway Course in a Box • Customized Airway Courses • Airway Training Course Calendar • Airway Cam Videos • Airway Cam & Other Books • On-line Airway Training • EQUIP: AirwayCam Books and DVDs • Trucorp Mannequins • Emergency Airway Kits •
Rescue Intubation Devices • Rescue Ventilation Devices • Laryngoscopes • Tubes-Stylets-Bougies • Accessories • Vision Enhancement