ventilator associated pneumonia
DESCRIPTION
Ventilator Associated Pneumonia. Jeremy Fisher, PGY-3 VA vascular Surgery July 2011. 62M w / Systolic dysfn , HTN, DMII, smoking hx , POD 7 s/p Aorto -bi-fem bypass Kept intubated for pressor requirement post-op Now off pressors - PowerPoint PPT PresentationTRANSCRIPT
JEREMY FISHER, PGY-3VA VASCULAR SURGERY
JULY 2011
Ventilator Associated Pneumonia
62M w/ Systolic dysfn, HTN, DMII, smoking hx, POD 7 s/p Aorto-bi-fem bypass
Kept intubated for pressor requirement post-op
Now off pressorsIncreased FiO2 from 0.40 to 0.50 o/n and
increased PEEP 5->8CXR w RML infiltrate and generalized
haziness across both lung fieldsWBC 13.5 (11.0)
What is the diagnosis? Criteria?Further studies?Treatment?What could have prevented this?
Overview
1. Diagnosis
2. Incidence and Impact
3. Treatment
4. Prevention
Overview
1. Diagnosis What is VAP? Clinical Criteria Respiratory Sampling/Cx
2. Incidence and Impact
3. Treatment
4. Prevention
What is VAP?
Pneumonia that develops in someone who has been intubated
Usually refers to those intubated >48 hours Early onset <4 days Late onset >4 days
Diagnosis of VAP
Clinical diagnosis is challenging and controversial
Suspect VAP when:CXR – new or progressive infiltrate ANDAt least 2 of fever, abnormal WBC,
purulent secretions
Obtain lower respiratory culture
Diagnosis of VAP
Clinical diagnosis is challenging and controversial
Suspect VAP when:CXR – new or progressive infiltrate ANDAt least 2 of fever, abnormal WBC,
purulent secretions
Obtain lower respiratory culture
LR 1.7; 95% CI,1.1-2.5
LR, 2.8; 95% CI, 0.97-7.9
Incidence 9.7% then likelihood 23%
LR 0.35; 95% CI,0.14-.87
Probability 3.6%
- Klompas, 2007- Review/Meta analysis,- 14 Studies
Diagnosis of VAP: CPIS Score
Diagnosis of VAP: CPIS Score
CPIS > 6
Sensitivity 72-93% Specificity 42-85%
Diagnosis of VAP: CDC Criteria
Diagnosis: Lower Respiratory Sampling
Blind Bronchial Aspirate
> 105 CFUs
Bronchoalveolar Lavage
> 104 CFUs
Mini–BALProtected Brushings
Diagnosis of VAP: Culture
Blind
Diagnosis: Lower Respiratory Sampling
Blind Bronchial Aspirate
> 105 CFUs
Bronchoalveolar Lavage
> 104 CFUs
Positive Gram StainLR 2.1 for VAP
Positive Gram StainLR 18 for VAP
If less than 50% of cells = NeutrophilsVAP very unlikely (LR 0.05-0.10)
Growth > 105 CFUs LR 9.6 for VAP
Growth > 104 CFUs “Unhelpful”
Respiratory Sampling: Comparing the Methods
-90 Trauma patients with suspected VAP
-BAL, blind aspirate, bronchoscopy brushings, blind brushings
-Compared GS and Cx-Calculated agreement between modalities (kappa values)
No statistically significant difference
in yield
Diagnosis of VAP: Summary
Clinical diagnosis is challenging and controversial
Suspect VAP when:CXR – new or progressive infiltrate ANDAt least 2 of fever, abnormal WBC, purulent secretions
Obtain lower respiratory culture+GS more meaningful w/ deeper sample+Cx >10,000 CFUs on BAL does not make diagnosis
but may guide therapy (controversial)>100,000 CFUs more convincing
Overview
1. Diagnosis
2. Incidence and Impact
3. Treatment
4. Prevention
Incidence and Impact
VAP occurs in 9-27% all intubated patients
2.1-10.7 episodes of VAP per 1000 ventilator days
Barsanti, MC, Woeltje KF. “Infection Prevention in the Intensive Care Unit.” Infect Dis Clin N Am 23 (2009) 703–725. Apr 2009.
Chastre J, Fagon JY. Ventilator-associated pneumonia. Am J Respir Crit CareMed 2002;165(7):867–903.
Incidence and Impact
Patients w VAP are twice as likely to dieSignificantly longer duration of ventilation
and hospital stayAdditional $10,000-40,000
Safdar N et al. Clinical and economic consequences of ventilator-associated pneumonia: a systematic review. Crit Care Med. 2005 Oct;33(10):2184-93
Overview
1. Diagnosis
2. Incidence and Impact
3. Treatment Bacteriology Strategy for Antibiosis Duration of Therapy
4. Prevention
Current Recommendations
Infect Dis Clin N Am 23 (2009) 521–533
General Strategy
Starting with broad spectrum antibiotic therapy improves mortality
Choice of BS Abx regimen should be guided by institutional bacteriology
Narrow coverage when possible (Cx guided)Double coverage for those at high risk for
MDR
At Risk for MDR
Antibiotic Choice
Abx Choice Algorithm
Possible MRSA
Duration of Therapy
Reassess at 72 hours, narrow if possible, broaden if necessary
Duration not well established in literatureSome studies suggest 8 days is equivalent to
14 days (Chastre)
Overview
1. Diagnosis
2. Incidence and Impact
3. Treatment
4. Prevention
Prevention
Evidence Driven Factors to Reduce VAP- High RN to Pt ratio- Reduced use of invasive ventilation- Semirecumbent positioning- Continuous aspiration of subglottic secretions- ET cuff pressure >20 cm H2O- Silver coated ET tubes
Barsanti, MC, Woeltje KF. “Infection Prevention in the Intensive Care Unit.” Infect Dis Clin N Am 23 (2009) 703–725. Apr 2009.
Prevention
Controversial Interventions- Slightly decreased rate of VAP w/ use of
sucralfate in place of ranitidine, but increased risk of GIB (8 trials)
- Oral care w/ chlorhexidine decreases VAP rates for those intubated <48hrs
- Abx w/o diagnosis of VAP not recommended
Barsanti, MC, Woeltje KF. “Infection Prevention in the Intensive Care Unit.” Infect Dis Clin N Am 23 (2009) 703–725. Apr 2009.
REMEMBER!
1.VAP is common and costly (in lives and $)
2. New/progressive infiltrate on CXR + 2 (fever, abnormal WBC, purulent secretions) -> high clinical suspicion for VAP
3. BS abx as guided by local bacteriology, double coverage for those at high risk for MDR (esp pseudomonas)
4. Good nursing w/ HOB elevated and suctioning can reduce rates of VAP
References