airway management in the icu - niagara rhinoplasty · 2015. 4. 23. · • meta analysis of 17...
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Airway Management in the ICU
New developments in management of epistaxis.
April 28, 2008
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Methods of airway control
• Non surgical – BIPAP– CPAP– Mask ventilation– Laryngeal Mask– Intubation
• Surgical– Cricothyrotomy– Tracheotomy
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Anatomy
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Anatomy
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Histology
• Posterior and subglottis: respiratory epithelium• Pseudostratified columnar ciliated epithelium• Very poor resistance to trauma• Anterior glottis: squamous epithelium
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Respiratory EpitheliumPseudostratified ciliated columnar epithelium
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Surgical
• Cricothyrotomy• Tracheotomy
– Where– When– Why– How
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Anatomy
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Cricothyrotomy
• Percutaneous kits by Cook
• Portable kits• # 11 blade
– Snap– # 6 Schilley trach
or Endotracheal tube
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Cricothyrotomy
• E:\icu talk\C-T-UTCCSB304.pdf
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Indications for tracheotomy
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Tracheotomy tubes
• Schilley• Portex• Bivuona• Armored laryngectomy tubes
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Tracheotomy tube options
• Shiley Quick Reference Guide June 2006.pdf
• Shiley XLT Sales Brochure.pdf
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Tracheotomy care
• Sutured in for 7 days in open approach• When to change tracheotomy tube?• With disposible inner canula the trach can
be left for 1 month before changing.• How to change a trach?• Suture removal?• Accidental decanulation?• Downsizing?
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Rationale for tracheotomy
• Initially indicated as a comprimise between morbidity associated with laryngeal injury from endotrachial intubation and that associated with tracheotomy.
• 1989 consensus conference on artificial airways reccomended continued use of ET if ventilation required for less than 10 days vs tracheotomy if anticipated to be required for more than 21 days.
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Why Tracheotomy in the ICU
• Reduce length of ICU stay• Sedation• Ventilator assisted pneumonia• Mortality rate• Complications of subglottic, tracheal stenosis• Patient mobility• Oral and pharyngeal complications• Secure airway
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Studies
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Where• ICU vs OR suite• Meta analysis of 17 RCT’s involving 1212
patients looked at surgical vs percutaneousdilation technique (PDT) performing tracheotomy.
• PDT found a lower incidence of wound infection and may reduce incidence of post operative bleeding and death compared with surgical tracheotomy in the operating room.
• Delaney et al Critical Care 2006
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Timing of tracheotomy
• Ultimately it is the evaluation of the intensivist, combined with the consideration of the patient benefits which will determine this.
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Psychological impact
• 92% of critical care nurses indicated they would prefer tracheotomy if more than ten days of mechanical ventilation required
• Astrachan et al.
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When?• Incidence: of subglottic
stenosis following intubation
• varies with length of intubation:– <5 days
rare– 5-10 days 4%– >10 days 14%(Locicero et al, 1992)
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When• Early tracheotomy can significantly decrease total days
of sedative administration and may reduce ventilator assisted pneumonia.
• K Mitka et al Critical Care 2008• Significant reduction in mechanical ventilation and VAP ,
lower ICU LOS when tracheotomy performed within 7 days of SICU admission
• M. Muller et al Am J of Surgery • Lower mortality, accidental extubations, length of stay in
the ICU, time on mechanical ventilation, reduced damage to oral mucosa and larynx
• Rumbak MJ et al Critical Care Medicine 2004
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Studies
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Why
Shorter length of stay in the ICULower incidence of pneumoniaLower mortality ratesReduction in oral and pharyngeal complicationsMore secure airwayReduced sedationIncreased mobilityReduction in subglottic and tracheal stenosis
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How
• Surgical • Bedside• In the Operating Room
• Percutaenous– There is no role for routine pre op imaging
• Translaryngeal tracheotomy
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Surgical• Tracheotomy: defined
as an incision of the trachea.
• Tracheostomy: surgical creation of an opening into the trachea through the neck with the tracheal mucosa being brought into continuity with the skin.
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Surgical
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Complications
• Bleeding (number one complication)• Loss of Airway• Recurrent nerve injury• Tracheo innominate fistula• Infection
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Five percutaneous techniques
• Ciaglia serial dilation• Ciaglia tapered single
dilator• Griggs’ forceps
dilation technique• Translaryngeal
tracheotomy• Screw-in dilational
techinique
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Patient Selection• Palpable cricoid
cartilage ideally 3cm above sternal notch with appropriate neck extension
• Ideally patient should not be a difficult translaryngeal intubation
• Reasonable level of positive end-expiratory pressure needed ie. Less than 10cm H2O
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Ciaglia Percutaneous dilation
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Video
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Complications• Death• Hemorrhage• False passage• Stomal infection• Granulation tissue• Subcutaneous emphysema• Accidental extubation• Tracheal stenosis• Tracheoesophageal fistula
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Bronchoscopic guidance
Cons• Concerns about
hypercarbia• Possible hypoxia• Partial airway obstruction
– Reilly et al Intensive Care Medicine 1997
Pros• Improved visualization• Reduced complication
rates• Improved needle
localization• Reduction of posterior
tracheal wall injury • Reduced tracheal
stenosis– Polderman et al Chest 2003
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Video monitoring
• Improved visualization and exposure during procedure.
• Ideally should be the standard in the ICU for percutaneous techniques
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Safety of technique
• Numerous studies show percutaneous techniques to be reproducible safe.
• Results comparable with open techniques in long term follow up.
• Shown to have lower cost, infection and morbidity in some studies vs open techniques.
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Percutaneous vs Open complication rate
Pro• Freeman et al Chest
2000: lower incidence of peristomal bleeding and post op infection with ease of performing procedure
• Cheng, Fee: Ann Otol Rhinol Laryngol 2000: similar findings to above
Con• Dulguerov et al Critical Care
Medicine 1999: higher rate of perioperativecomplications with PDT including a higher rate of death and cardiorespiratoryarrests.
• Massick and SchullerLaryngoscope 2001: lower complication rate for open vs percutaneous.
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Post op care
• Percutaneous tracheotomy requires a longer period for stomal maturation.
• 2 weeks are recommended before any tube change to prevent loss of airway.
– Marx WH, Ciaglia P et al: Some important details in the technique of Percutaneous dilatational tracheotomy via the modified Seldinger technique Chest 1996
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Special Considerations
• Obese patients• Short neck• High innominate artery• Large thyroid gland• Midline neck mass• Coagulapathic patients
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Conclusion
• Early vs Late tracheotomy seems to produce better results
• Tracheotomy in the ICU is a safe cost effective option
• Percutaneous techniques are safe when performed in experienced hands
• Videobronchoscopic techniques improve exposure and reduce complications.