charles w sheppard md medical director mercy life …...delayed sequence intubation? sit upright?...
TRANSCRIPT
![Page 1: Charles W Sheppard MD Medical Director Mercy Life …...Delayed Sequence Intubation? Sit upright? Normal patient breathing room air (PaO2 90-100) desaturation 45-60 sec. Normal patient](https://reader035.vdocuments.net/reader035/viewer/2022071102/5fdbce6c54d5774cc9450015/html5/thumbnails/1.jpg)
Charles W Sheppard MD
Medical Director
Mercy Life Line
Mercy Kids Transport
Springfield MO
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No ConflictsI have no interest in Anything discussed
As far as I know there are no labels to be off of in this talk except push dose pressors
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Not deal with “failed airway”
Not deal with “tube in wrong hole”
Discuss the “physiological difficult airway
Deal with the “celebration” after “success”
Immediate complications
Slightly later complications
Prevent “late complications”
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Anatomically difficult airway
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› Everyone familiar with the “anatomically difficult airway”
› Should recognize the “physiologically difficult airway – Hypotensive
– Hypoxic
– Acidotic
› Easy to kill with intubation so plan accordingly
The “physiologically difficult airway”
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65 y/o COPD patient fever and change in character and color of sputum. Multiple home breathing treatments have not worked called 911
Pale mottled diaphoretic skin hot to touch. Very little air movement, Rales and ronchi everywhere. Minimal response to verbal stimuli
VS 180/110, P 130, RR 35
Oh yes on 6L SAO2 = 78%
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Multiple attempts
Desaturation
Hypotension
Acidosis/alkalosis
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Complications
Morbidity/mortality increases with each attempts.
Sakles showed (2004) complications increased from 14% (first attempt) to 71% by 4th attempt
Actually increases dramatically after first attempt (Braude)
How to minimize attempts Position
Remove collars, ELM etc
oxygen
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Oxygen reservoir?
Already hypoxic
PreoxygenateNon Rebreather 15 l/m?Delayed Sequence Intubation?Sit upright?
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Normal patient breathing room air (PaO2 90-100) desaturation 45-60 sec.
Normal patient breathing 100% (“reservoir” full) desaturation 8 min
Faster in obese 2.7 min, moderately sick people 5 min, kids faster younger (smaller)
Goal of RSI is to get maximum reservoir of Oxygen BEFORE Intubation.
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Anesthesia circuit 15 l/m FIO2=90-100%
“non rebreather” 15 l/m FIO2=60-70%
Non rebreather 30-60 l/m FIO2=90%
Add NC at 15 L over 90%
Holding ambu bag = room air (21%)
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Lane et al Anaesthesia 2005 Compared preoxegenation in supine vs 20 deg head up.
Gave paralytic and measured time from 100%-95% Head up 386 sec Control 283 sec
Altermatt Brit J Anaesth 2005 Obese patient (BMI 35) 25 deg head up SpO2 100%-90%. 214 sec vs 162 sec
Boyce et al Obes Surg 2003 Reverse trendelenburg (30 deg head up) similar results.
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› Movement of oxygen and CO2 cause alveolar O2 pressure to be negative
› Causes oxygen to passively move into alveoli
› Optimal circumstances oxygenation up to 100 min without breathing (will get severely hypercarbic)
› Taha et al anaesthesia 2006 no desats 6 min at 5 L/m NC control 3.65 min
› Ramachandran J Clin Anesth 2010 obese patients 5 l/m – >95% 5.29 vs 3.49 min
Apneic oxygenation
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Baillard et al Am J Resp Crit Care 2006 ICU patients on NIPPV 98% SpO2 vs 93% preintubation During intubation 93% vs 81% 12 control vs 2 NIPPV group dropped to <81%
Multiple other studies (not critically ill however) show similar results
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Use of medications and BVM or NIV as a bridge to intubation.
Sedation (propofol, etomidate, etc)
Better Ketamine, dexmetetomidine
CPAP
Intubate
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Movement of oxygen and CO2 cause alveolar O2 pressure to be negative
Causes oxygen to passively move into alveoli
Optimal circumstances oxygenation up to 100 min without breathing (will get severely hypercarbic)
Taha et al anaesthesia 2006 no desats 6 min at 5 L/m NC control 3.65 min
Ramachandran J Clin Anesth 2010 obese patients 5 l/m >95% 5.29 vs 3.49 min
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2 studies suggest time to desaturation is shorter with Succinylcholine than with rocuronium
Taha Anaesthesia 2010
Tang Acta Anaesthesiol Scand 2011
At a dose of 1.2 mg/kg Rocuronium gives identical intubating conditions to Succinylcholine
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Read Weingart and Levitan Ann EM March 2012 for review.
Crank oxygen all the way up nasal cannula under mask
Tight fitting mask
Keep head of bed up
Us NIPPV
Consider DSI
Keep oxygen on while intubating
Consider Rocuronium over Succinylcholine
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Sympathetic drive
Hypovolemia
Increased intrathoracic pressure
Medications we use
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Preload with fluid500-1000 ml NSHave atropine/phenylephrine/ epinephrine readyPush-dose pressors?
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Epinephrine Syringe with 9 ml NS draw up 100 mcg
(0.1mg) cardiac epinephrine = 10 mcg/ml Inject 0.5-2ml q 2-5 min for pressure
control
Phenylephrine 1 ml phenylephrine from vial (10 mg) Inject in 100 ml NS bag = 100 mcg/ml Inject 0.5-2 ml q 2-5 min for pressure
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Acidosis/alkalosis
Dynamic hyperinflation
Tension pneumothorax
Bronchorrhea
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DKA?
Sepsis?
Other acidosis? (salicylate toxicity)
BE VERY CAREFUL ABOUT VENTILATION
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28 y/o female called for respiratory distress unable to give any real history “friend” says been sick a couple of days worse today doesn’t know any of patient’s medical history.
BP 150/98 P 130 NSR, RR 35 SAO2 95% Intubated “to control Resp” Vent setting RR 16 Appropriate TV Short time later
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DKA
Ph before intubation 6.90 with PCO2 10 K6.8
After PCO2 35 Ph 6.75 or so with appropriate shift in K
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Try to match preintubation ETCO2.
Avoid trying to “normalize” parameters of ventilation
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Problem is “can’t exhale”
Intubation makes that worse
Be careful
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Vent settings to start TV 6 ml/kg IBW
RR 10-12
PEEP of 8-12
High inspiratory flow rate
Ignore peak pressure
Plateau pressure < 35
Ignore ETCO2
SAO2 goal 88-92%
Treat hypoxia first with increasing PEEP FiO2 second
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COPD, Asthma, Bronchial obstruction/spasm
Excessive TV
Don’t allow time to exhale
Excessive PEEP
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Increasing thoracic pressure
Decreasing venous return
Increasing difficulty ventilating
Confused with Tension Pneumothorax
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Step one Disconnect the ventilator
Step two wait listen for prolonged exhalation
Step three push on chest to force exhalation.
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Bring out the needle/chest tube
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BV ventilation is not accurate
Use right numbers
Way better
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ARDS net only real data6-8 ml/kg
IDEAL BODY WEIGHT
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IBW kg= 50 +2.3(Height in inches-60)
IBW kg =50+0.96(Ht in cm-152.4)
Example 5 ft tall IBW=50 kg50x7ml/kg=350 ml tidal volume
Example 6 ft tall 50 + 2.3x(72-60)=77.678x7=546 ml tidal volume
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Example: Ht = 152.4 cm IBW = 50+ 0.96(152.4-152.4)=50kg
TV =7X50=350 ml
Example 2: Ht = 182.9 cm IBW= 50+0.96(182.9-
152.4)=50+0.96(30.5)=79.3kg
TV= 7X79.3=555
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Use ulnar length to get height
Much easier
Appears way more accurate than “estimating”
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Ulnar length 18.5 19 19.5 20 20.5 21 21.5 22 22.5 23 23.5 24 24.5 25Male<65 ht inch 57 58 59 59 60 61 62 62 63 64 65 65 66 67
Male<65 TV 301.7 317.8 333.9 333.9 350 366.1 382.2 382.2 398.3 414.4 430.5 430.5 446.6 462.7
Male >65 Ht inches 57 57 58 59 59 60 61 61 62 63 63 64 64 65
Male >65 TV 301.7 301.7 317.8 333.9 333.9 350 366.1 366.1 382.2 398.3 398.3 414.4 414.4 430.5
Female <65 Ht inches 58 58 59 59 60 60 61 61 62 63 63 64 64 65
Female <65 TV 317.8 317.8 333.9 333.9 350 350 366.1 366.1 382.2 398.3 398.3 414.4 414.4 430.5
Female >65 Ht inches 55 56 57 57 58 58 59 60 60 61 61 62 63 63
Female >65 TV 269.5 285.6 301.7 301.7 317.8 317.8 333.9 350 350 366.1 366.1 382.2 398.3 398.3
Ulnar length 25.5 26 26.5 27 27.5 28 28.5 29 29.5 30 30.5 31 31.5 32Male <65 Ht inches 67 68 69 69 70 71 72 72 73 74 74 75 76 76
Male < 65 TV 462.7 478.8 494.9 494.9 511 527.1 543.2 543.2 559.3 575.4 575.4 591.5 607.6 607.6
Male >65 Ht inches 66 66 67 67 68 69 69 70 70 71 72 72 73 74
Male > 65 TV 446.6 446.6 462.7 462.7 478.8 494.9 494.9 511 511 527.1 543.2 543.2 559.3 575.4
Female <65 Ht Inches 65 66 67 67 68 68 69 69 70 70 71 71 72 72
Female < 65 TV 430.5 446.6 462.7 462.7 478.8 478.8 494.9 494.9 511 511 527.1 527.1 543.2 543.2
Female >65 Ht Inches 64 65 65 66 67 67 68 69 69 70 70 71 72 72
Female >65 TV 414.4 430.5 430.5 446.6 462.7 462.7 478.8 494.9 494.9 511 511 527.1 543.2 543.2
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ARDS net only real data6-8 ml/kg IDEAL BODY WEIGHTPlateau pressuresMean Pulmonary PressuresPeak pressure
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VAPAspirationSecondary lung injuryHyperoxiaDelirium/death
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Ventilator
Associated
Pneumonia
Most common life threatening complication
Prolonged hospital stays
Added cost to patient/system
CMS quality measure on your web site
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Avoid aspiration (RSI) prolonged attempts Keep head of patient elevated Empty stomach (OG/NG) Keep mouth empty (suction special ET
tubes) Keep mouth clean/sterile use swabs
If you suction ET tube use sterile technique.
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Ventilator Induced Lung Injury VILI
Barotrauma
Atelectotrauma
Oxygen toxicity
Fluid overload
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Excessive volumeExcessive pressures
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Repetitive collapse and opening
“snap” openingsPEEP
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Start with 100%
Dial down as fast as possible Unless head injury or myocardial
ischemia 88-92% is goal.More and more evidence bad for
injured brains and COPD maybe heart
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Post ROSC? JAMA 2010 If patient was hyperoxic with a pa02 >300, they did worse than the patient with a paO2 <60.
COPD patients? BMJ 2010 405 patients with presumed COPD exacerbations requiring EMS transport to the hospital that were placed into two groups; one group received high--‐flow oxygenation and the other titrated oxygenation to maintain O2 sats between 88--‐92%. The high--‐flow oxygenation group had a mortality rate of 9% compared to 4% for the titrated oxygenation.
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I know I know I just said preload them but Be careful after that Don’t chase other causes with fluids Use common sense
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Being intubated is painful Most intubated patients complain of pain Pain is bad for you Always, Always, Always treat pain first Try to use pain medications first and then
add sedatives and avoid paralytics if possible ARDS net data indicates prolonged use of
paralytics is associated with increased difficulty weaning the patient.
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Fentanyl drip at 1-1.5mcg/kg/hr then bolus50-100 micrograms until comfortable then add minimal sedation as needed. Propofol, dexmetetomidine best.
Hemodynamic instability ketamine
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Early Intensive Care Sedation Predicts Long-Term
Mortality in Ventilated Critically Ill Patients
Yahya Shehabi et al Am J Respir Crit Care Med 2012 Conclusion: Deep sedation first 48 hrs assoc with
increased LOS and Mortality. 251 Critically ill patients
Deep sedation in first 4 hrs independent predictor of: Time to Extubation Hospital death 180 day mortality
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Associated with increased delirium, LOS, and maybe mortality.
Benzodiazepine Versus Nonbenzodiazepine-Based Sedation for Mechanically Ventilated, Critically Ill Adults: A Systematic Review and Meta-Analysis of Randomized Trials Crit Care Med 2013 6 trials 1235 pts
Conclusion non benzo assoc w 1.62 less days LOS
1.9 less vent days
No diff delirium mortality
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Treat pain first and aggressively
Use opiates first line
Avoid Benzos use other sedatives
Use validated pain and sedation scales.
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Remember life begins after intubation
Prevent desaturation
Prepare for (better yet prevent) hypotension
Use the ventilator whenever possible
Use the right settings
Give pain medications
Avoid excessive oxygen
Protect the patient with elevation, suction, swabs and empty stomach.
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