Research In Airway Management Medic One Tuesday Series April 2009
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Transcript of Research In Airway Management Medic One Tuesday Series April 2009
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Research In Airway Management
Medic One Tuesday SeriesApril 2009
Keir J. Warner, BSParamedic Training
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JEMS March 2009“When paramedics were first introduced in the 1970’s, one of the most controversial aspects of their training program was endotracheal intubation.”
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JEMS March 2009“…it was difficult to secure time when paramedic students could practice their intubation skills on live patients.”
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JEMS March 2009“…many paramedics of that era were graduated without ever having the opportunity to perform an ETI.”
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JEMS March 2009“…many paramedics of that era were graduated without ever having the opportunity to perform an ETI.”
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JEMS “Is ETI the Gold Standard”“Argues that failure to VENTILATE not failure to INTUBATE should be the gold standard.”
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JEMS “What are the Success Rates”
In Florida 37% mis-placement rateNon-cardiac arrest patients 58% 1st passPediatric ETI only 78%THE BEST DATA?–Western Washington
Bulger, et al. -98.4%Wayne, et al. -95.5%
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JEMS “Outcomes”“Outcome studies in trauma patients fail to show benefit from ETI.”“…not supported by evidence…”“ETI… associated with similar or greater mortality than bag-valve mask ventilation alone.”
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JEMS “OR Time & Field ETI”“Half of paramedic training programs provide less than 16 hours of OR time.”Average of 3.7 ETI per year In another study,–67% had 2 or less ETI per year–39% had none at all
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JEMS “Alternatives”“… paramedics had alternative airways that were as good as ETI, and perhaps safer.”“…with the advent of (supra-glotic) airways that don’t require visualization of the airway, and have been found to be safe and effective, it’s hard to continue to justify continued routine ETI in prehospital care.”
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JEMS “Accepting the Inevitable”“Ironically, it is no the scientific evidence against prehospital ETI that is driving it out of EMS practice. It is simply the inability to properly educate students in… (ETI).”“ETI, will probably be a thing of the past. We must embrace the current adjunct airways…”
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Why Does Medic One Intubate ?
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The Medic One Rule for Training
“For us to perform an invasive procedure it must be as if a well trained physician is doing the procedure…”
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ETI Success Rates
75% 75%
89%
57%
95%
55%
96.8%
49%
97.5%
44%
97.9%
1st 2nd 3rd 4th 5th 6th All OETI
CumulativeIndividual
98.3%
3rd
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Anatomic Features of the Difficult Airway
Anatomic Factors Frequency
Percentage
Obese 25 20.8 %Anterior Trachea 51 39.2 %
Distorting Facial Trauma 7 5.8 %Short Neck 23 19.2 %
Large Tongue 22 16.9 %FB/ Aspiration 32 26.7 %Small Mouth 36 30.0 %
Stiff/Fused Neck 16 13.3 %
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Problems Getting an Airway?
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Difficult Airway Rescue Success
Method Attempted
# Attempte
d# Worked Success Rate
Oral ETT 130 59 45.3%
Nasal ETT 1 0 0 %
Digital ETT 7 1 14.3 %
Retrograde Intubation
17 7 41.2 %
Jet Insufflation 4 1 25.0 %
Cricothyroidotomy 11 10 90.9 %
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Airway Management Goals
Provide OXYGENATION (High Flow O2)–Prevent HypoxiaProvide VENTILATION (Remove CO2)PROTECT the airway!–Aspiration–Obstruction
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Airway Management OptionsBLS–Spontaneous Respirations
High Flow O2 with NRB–May provide adequate Oxygenation, but what about Ventilation?
–No RespirationsBVM with Oral AirwayCombitube/LMA–No Protection from Aspiration–Poor ability to ventilate
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Airway Management OptionsALS–Protect, Oxygenate & Ventilate!–Oral Endotracheal Intubation
RSI with meds for GCS <8Monitor SpO2 for OxygenationNo reliable way to judge ventilation in the multiply injured patient
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Gold Standard RSI Monitoring: Pulse Oximetry & Expired CO2
Prevent De-saturations During RSICapnography
Confirm the ETT, and monitor
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Paramedic Training for Proficient Prehospital
Endotracheal Intubation Keir J. Warner BS
David Carlbom, MDColin R. Cooke, MD, MSc
Eileen M. Bulger, MDMichael K. Copass, MD
Sam R. Sharar, MD
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UWSOM PMT Program2,200 hrs of PMT–400 hrs of lectures–100 hrs of labs–600 hrs of clinical–800 hrs of field internship–300 hrs of formal evaluation
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ObjectiveThe goal of this study is to
describe the relationship between the number of ETI experiences during initial
paramedic student training and the likelihood of success on subsequent ETI attempts
in the prehospital setting
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MethodsA Retrospective Study UWSOM Paramedic Training ProgramReviewed Prehospital “Blue Sheets”Data into a database and analyzedINCLUSION CRITERIA–Student Attempted Prehospital
Intubation
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DefinitionsETI success was defined as any
placement of an ETT that was confirmed to be within the
trachea regardless of number of attemptsFirst pass success was defined
as placement of an ETT within the trachea on the first
ETI attempt
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ResultsTable 1 N=56 Students
ETI Location N= Student ETIsMedian (IQR)
Operation Room (Adults) 706 13 (11-14)
Emergency Department 71 1 (0-2)
Operating Room (Children) 263 5 (3-6)
Prehospital 576 10 (7-13)
Total Intubations 1616 29 (25-33)
ETI= Endotracheal Intubation, IQR= Interquartile Range
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ResultsTable 2
ETI Type N=Percent of
Prehospital ETIs
ETI Per Student
Median (IQR)
Total Success
Rate
1st Pass Success
RateCardiac Arrests 175 30.4% 3 (2-4) 88.6% 63.4%Trauma 148 25.7% 3 (1-4) 87.8% 63.5%RSI 375 65.1% 6 (5-9) 88.3% 67.7%
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100%
90%
80%
70%
60%
50%0 5 10 15 20
Overall Success
First Pass Success
Cumulative Prehospital Intubation
Pre
hosp
ital E
TI S
ucce
ss R
ate
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Limitations
Inability to record all OR intubation success ratesOnly three years worth of dataMissing data on anatomic confounders
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Where do we go from here?Continue to track skill acquisition in the OR and Field settingsIncrease opportunities for ETI during trainingContinue to review and change our practices based on our evidence
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ConclusionsOdds of endotracheal intubation
success increase with each cumulative exposure to ETI.
First-pass placement of the endotracheal tube with high success rates requires high numbers of ETI that may exceed the number available in many training programs.
The national curriculum recommendation of five successful endotracheal intubations is inadequate to produce appropriate prehospital ETI success rates and should be reconsidered.
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