emergency respiratory medicine and the difficulty airway, jordan barnett md
DESCRIPTION
Presented as a Faculty member of the Deborah Heart and Lung Center\’s, "What\’s Up Dock," on Friday, September 11th 2009, at the Independence Seaport Museum in Philadelphia. This conference\’s purposes was to review the most current developments and advances in medicine as they pertain to practicing physicians and allied health professionals alike. Jordan Barnett MDTRANSCRIPT
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Emergency MedicineAnd the Difficult Airway
Jordan Barnett, MD FACEP FAAEM
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Disclaimer
This presentation is free of
commercial bias
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Dichotomy • Anesthesiologists usually have
time to prepare
• Anesthesiologists often can defer care
• Anesthesiologists can obtain information and history from patient
• Anesthesiologists have non chaotic environment
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What Does the ED Contend with?
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Initial Assessment
• Be comfortable calling for help
• Surgical airway endpoint of all algorithms
• BVM to buy time. Not always imperative to intubate immediately
• Have a difficult airway cart and be familiar with it!
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Intubation Plan
• In crash situation, may intubate without paralytics
• Difficult airway cart to bedside
• What is your skill set, tools available?
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Predictors of a Difficult AirwayLEMON RULE
• Look at the Anatomy
• Evaluate using 3-3-2 rule
• Mallampati
• Obstructions
• Neck Mobility
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LOOK for predictors of Difficult Airway
• Abnormal,jagged, or protruding teeth
• Receding chin
• Facial hair
• Full stomach
• Obesity
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Other Items to LOOK for include
• No Teeth
• Elderly
• Snoring
• Large Tongue
• False Teeth
• Narrow Face
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Evaluate THE AIRWAY
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Evaluate with the 3-3-2 Rule
• Can you get 3 fingers in mouth? If So there is room for insertion of tube and laryngoscope
• Can you fit three fingers between the angle of the jaw and mentum? If so, you can probably lift the tongue forward
• Can you fit two fingersers between the top of the thyroid cartilage and bottom of jaw? If not, high anterior cord probably present
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Mallampati Classification
• Grades I and II high success rate at intubation
• Grade III can only see arytenoid cartilage
• Grade IV cannot visualize anything
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How to Mallampati Score
• Have Patient seated, extend neck, open mouth and stick out tongue
• Visualize Mouth, tongue, faucial pillars, uvula, and pharynx
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No obstruction
Complete obstruction
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OBSTRUCTIONS
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Types of Obstructions
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Neck Mobility?
Fracutre?Arthritis?
Surgical hardware?
Can’t Align Axises For Visualization!
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Always
• Try not to utilize medications too quickly. Evaluate airway first. Gives time to call for help
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All the predictors are fine theoretically but .......
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Difficult Airway Cart• Recommended items include
drawer for medications and basic equipment
• Intubating stylet or bougie
• Intubating laryngeal mask airway
• Light Wand
• Fiberoptics
• surgical airway kit - essential
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Intubation equipment
• Options to avoid intubation include CPAP
• Consider intubation in OR
• For blind intubations consider LMA or Bougie
• Digital intubation?
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The Bougie
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How to use the Bougie
• Bougie acts as guide wire
• Gets Passed Blindly
• Feel for tracheal rings
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Lighted Intubation Stylet
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QuickTime™ and a decompressor
are needed to see this picture.
VIDEO
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Laryngeal Mask Airway
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QuickTime™ and ampeg4 decompressor
are needed to see this picture.
Note: This video provided to demonstrate LMA use. No financial interest with the
Solus Brand
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Airway Alternatives
• Supraglottic: Combitube; blind nasotracheal intubation still has role
• Infraglottic; Cannot BVM or intubate if access required below cords; Prepare for Cricothyrotomy In peds, consider transtracheal jet ventilation
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Combitube
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Combitube Details• Two Lumens
• Filling one blocks the esophagous
• Second Lumen acts like a standard cuffed tube
• Blind insertion
• 90% Esophageal insertion
• 100 cc for proximal balloon inflation
• 10 ml for distal balloon inflation
• Listen as you inflate through each port
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QuickTime™ and a decompressor
are needed to see this picture.
VIDEO
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Tracheal position
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Esophageal Position
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EMS using King LT
• Easier field insertion
• Simpler to change to ETT
• Can Place King without Interupting CPR
• Placement Edema
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Additional options
• Wire guided Seldinger technique
• Keep option to use open techinique if wire unsuccessful
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Retrograde Endotracheal
Intubation
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Technique In Detail
• Needle through Cricothyroid Membrane
• Retreive End of Wire
• Tube Changer over wire
• Slide in ETT
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VIDEO
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Anterograde Seldinger
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Pass wire through hub
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Pass Over Wire
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Fiberoptics
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Two Types Available
• Flexible
• Rigid
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Flexible Fiberoptic Intubation
• Used if Neck Extension Not desirable
• Risk of Dental Damage
• Abnormal airway
• Compromised Airway
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Advantages of Fiberoptics
• Excellent visualization
• Minimal hemodynamic stress when performed properly
• oral or nasal intubation is possible
• ability to apply topical anesthesia insufflate oxygen during intubation
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Disadvantages
• Expensive
• Requires maintenance
• Blood or secretions impairs visualization
• Requires “Practiced Expertise” for use in acute situations
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Video
QuickTime™ and aH.264 decompressor
are needed to see this picture.
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Rigid Fiberoptics
• Indicated for limited mouth opening
• Indicated for reduced neck movment
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Advantages
• Allows for visualization of the larynx with little neck movement and mouth opening
• Can overcome difficult view
• Sturdy and Durable instruments
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Disadvantages
• Skill
• External light source for some devices
• Wu Scope requires considerable mouth opening
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Levitan Scope
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Bullard Scope
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Wu Scope
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Upsher Scope
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New Laryngoscope blades
• Utilize video camera at end of laryngoscope
• Complications including fogging and inability to visualize airway after intubation
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GlideScope• Preferred over Laryngoscope
• Gets around Tongue Easily
• Insert with patient in neutral position
• Can see even in presence of blood and vomit
• Will probably replace Laryngoscope in 5 to 10 years
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Transtracheal Jet
• If under 8 and no airway, surgical airway of choice
• Temporary /Stabilizing
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Cricothyrotomy
• Taught as the “Final Pathway” to all ER physicians as a last resort for failed airway access
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QuickTime™ and ampeg4 decompressor
are needed to see this picture.
video
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Ready for some Cases?
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Difficult Airway Case 1
• 34 year old chronic alcoholic enters the ER “not feeling well.” History of “back pain” for which he has been seen and treated in the past (err....with Motrin?!)
• Suddenly, during evaluation and obtaining history and physical, patient begins to profusely vomit blood and becomes obtunded.
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Case 1 continued
• Monitor shows patient become bradycardic.
• Patient is rolled into rescue position and airway cart called for while multiple peripheral large bore IVs are established
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Case 1 continued
• Must protect airway!
• Despite attempts at direct visualization with laryngoscope blade and vigorous suctioning, there is just too much blood to see the cords
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Options?
• Blind digital intubation?
• Fiberoptics NOT an option
• Reverse Selinger?
• Crich?
• Lighted stylet?
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Case 2
• 73 year old female presents with history of hemoptysis.
• Hasn’t seen a doctor for “years” yet has been loosing weight. Has come to the ER now on the behest of family because of coughing up blood
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Case 2 continued
• During the episodes of hemoptysis, patient vagals.
• Airway protection paramount
• Best Management?
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Case 3• 35 year old male presented after
dental extraction placed on antibiotics
• Patient presented complaining of pain and swelling of the jaw
• Uvula shift to the left and swollen elevated tongue limit visualization. Sonorous respirations
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Discussion
• Conventional laryngoscope blade would probably be ineffective
• Fiberoptics ideal
• Crich kit on standby
• Call to anesthesia to ED on standby if situation not of immediate“Crash” type.
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Case 4
• 85 year old female presents via Fire Rescue tachypnic, with only 2-3 word sentences
• Medics report “flash pulmonary Edema” while “at your back door”
• “Doc, we only had time to place her on oxygen and get an IV when we pulled up!”
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Case 4 continued
• Patient tachypnic with rales 2/3 up
• JVD
• Pedal Edema at 2+
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Discussion
• Most ED docs today would trial patient on BiPAP with airway cart on standby
• Preload reduction with nitrates
• Afterload reduction with Captopril
• Intubation Equipment on standby!
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Case 5
• 27 year old male leaped from burning 2 story dwelling landing on back
• Arrives collared and back boarded, unconscious with a Glascow Coma Scale of 5
• Singed nasal hairs with carbonatious sputum
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Discussion
• Have to assume potential neck fracture
• Carbonateous sputum and singed nasal hairs taught as signs of pending airway edema
• Head injuries (which have to be assumed) preclude nasal intubation
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Management
• 2nd helper holds inline stabalization of neck during attempted intubation
• BURP maneuver
• Anesthesia on standby if can respond timely
• Too much edema? Can’t seen cords? Surgical option of crich.
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?