journal club. background to the paper pneumonia is the most common nosocomial infection in icu...
TRANSCRIPT
Journal Club
Journal Club
Background to the paper
• Pneumonia is THE MOST COMMON nosocomial infection in ICU patients
• 12 to 18 cases per 1000 ventilator days• Oropharyngeal colonisation• Aspiration of oropharyngeal bugs!
Outcomes
Primary outcome• Frequency of suspected pneumonia in a
semirecumbent & supine posture.
Secondary outcome• Compare frequency of microbiol confirmed
pneumonia in the 2 groups.
Methods
• Recruited for 1 year• 1000 bed tertiary hospital• Stress ulcer prophylaxis• Continous enteral feeding• Gastric aspiration every 4 hours
Methods II
Exclusions• Recent abdo surgery in last 7 days• Neurosurgery in last 7 days• Refractory shock• Previous endotracheal intubation in last 30
days
Methods III
• Random allocation to 0 deg or 45 deg head up• Computer generated randomization list
• Clin suspicion defined: new infiltrates on CXR• Fever > 38.3• WCC <4 or >12.• Purulent tracheal secretions• Pathogenic organism in BAL PSB
VAP: Why is it Important?
• VAP occurs in 10-25% of patients undergoing mechanical ventilation (4-16 cases/1000 ventilator days
• Patients stay in ICU on average 4-9 more days
• Attributable mortality 20-50%• High morbidity and mortality• Preventable with simple technology
Trial profile
Baseline data
Micro data
Pneumonia results
Major Results
Ventilator Associated Pneumonia (VAP) Practice Alert
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HOB Elevation Leads to Significant Deduction in VAP
Dravulovic et al. Lancet 1999;354:1851-1858
0
5
10
15
20
25
% V
AP
Supine HOB Elevation
Results
• 86 mechanically ventilated patients randomized to either supine (flat) vs semi-recumbent (45 degrees) to assess relationship to nosocomial pneumonia
• Trial stopped early• Clinically suspected pneumonia decreased from 34% to 8%
(p=0.003) in semi-recumbent group• Microbiologically confirmed pneumonia was reduced from
23% to 5% in the semi-recumbent group (p=0.018)• The semi-recumbent body position reduces frequency and
risk of pneumonia. • The risk of pneumonia increased with longer duration of
mechanical ventilation and with decreased consciousness.
Ventilator Associated Pneumonia (VAP) Practice Alert
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Continuous Removal of Subglottic Secretions
Use an ET tube with continuous suction through a dorsal lumen above the cuff to prevent drainage accumulation.
CDC Guideline for Prevention of Healthcare Associated Pneumonias 2004 ATS / IDSA Guidelines for VAP 2005
Ventilator Associated Pneumonia (VAP) Practice Alert
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HOB Elevation
HOB at 30-45º
• Torres et al, Annals of Int Med 1992;116:540-543• Ibanez et al. JPEN 1992;16:419-422• Orozco-Levi et al. Am J Respir Crit Care Med
1995;152:1387-1390• Drakulovic et al. Lancet 1999;354:1851-1858• Davis et al. Crit Care 2001;5:81-87• Grap et al. Am J of Crit Care 2005 14:325-332
Ventilator Associated Pneumonia (VAP) Practice Alert18
Is HOB Elevation Done?
Despite effectiveness of HOB elevation,compliance is poor.
• Grap et al. Am J Crit Care 1999;8:475-480
• Grap et al. Am J Crit Care 2005;14:325-332
0
20
40
60
% w
ith
HO
B E
lev
ati
on
0 to 20
21 to 30
31 to 40
> 40
Degrees ofHOB Elevation