Impact of the Duration of Antibiotics on Clinical Events in Patients With Pseudomonas Aeruginosa Ventilator-associated Pneumonia (iDIAPASON)

• Status: Completed
• Trial end date: 2018-08-16
• Target enrollment: 0
• Participant gender: All

Summary

Ventilator-associated pneumonia (VAP) accounts for 25% of infections in intensive care units (Réseau RAISIN 2012). A short duration (8 days; SD) vs. long duration (15 days; LD) of antibiotic therapy has a comparable clinical efficacy with less antibiotic use and less multidrug-resistant pathogens (MDR) emergence. These results have led the American Thoracic Society to recommend SD therapy for VAP, with the exception of documented VAP of non-fermenting Gram negative bacilli (NF-GNB), including Pseudomonas aeruginosa (PA-VAP), due to the absence of studies focusing specifically on PA-VAP. Thus the beneficial effect of SD therapy in PA-VAP is still a matter of debate. In a small (n=127) subgroup analysis, a higher rate of recurrence with SD therapy (n=21, 32.8%) has been observed compared with LD therapy group (n=12, 19.0%). Unfortunately, the definition of recurrence was essentially based on microbiological rather than clinical data, and the higher rate of recurrence observed could rather reflect a higher rate of colonization more than a new infection.

Interestingly, a trend for a lower rate of mortality was also observed in the SD group (n=15, 23.4%) compared with the LD group (n=19, 30.2%), but this study was clearly underpowered to detect a difference of mortality between groups.

The two strategies were considered as not different, for the risk of mortality in a recent meta-analysis, performed on the very few available studies (n=2), that (OR = 1.33, 95% CI [0.33 to 5.26] for SD vs. LD strategies respectively). However, this conclusion remains questionable considering the large confidence interval of the risk and the power of these studies.

Primary objective and assessment criterion: To assess the non-inferiority of a short duration of antibiotics (8 days) vs. prolonged antibiotic therapy (15 days) in P. aeruginosa ventilator-associated pneumonia (PA-VAP) on a composite end-point combining Day-90 mortality and PA-VAP recurrence rate during hospitalization in the ICU.

Study Design :

Randomized, open-labeled non inferiority controlled trial 32 French Intensive Care Units participating to the study

Research period:

Total study duration: 27 months Inclusion period: 24 months Duration of participation for a patient: 90 days

• Phase: N/A
• Accepts Healthy Volunteers?: No

Details

• Lead Sponsor: Assistance Publique - Hôpitaux de Paris
• Treatments: Anti-Bacterial Agents; Antibiotics, Antitubercular

Criteria

Inclusion Criteria:

• Patients older than 18 years

• Mechanical ventilation ≥ 48 hours

• Documented Pseudomonas aeruginosa ventilator-associated pneumonia:

• Clinical suspicion (≥ two criteria including: fever> 38.5°C,leukocytosis > 10 Giga/L or leukopenia < 4 Giga/L, purulent tracheobronchial secretions and a new or persistent infiltrate on chest radiography).

• Documented Pseudomonas aeruginosa positive quantitative culture of a respiratory sample: bronchoalveolar lavage fluid (significant threshold, >104cfu/ml) or plugged telescopic catheter (significant threshold, >103cfu/ml) or quantitative endotracheal aspirate (significant threshold, >106cfu/ml).

• Written informed consent

• Patient affiliated to French social security

Exclusion Criteria:

• Immunocompromised patients (HIV, immunosuppressive therapy, corticosteroids> 0.5 mg / kg per day for more than a month)

• Patients receiving antibiotic therapy for extrapulmonary infection

• Patients in whom a procedure of withdrawing life-sustaining treatment has been established

• Pregnancy

• Patients included in another interventional study

• Chronic pulmonary colonization with Pseudomonas aeruginosa: patients with Chronic Obstructive Pulmonary Disease (COPD) or bronchiectasis, with a positive respiratory sample at infra threshold rate for Pseudomonas aeruginosa (ie<103 CFUs/mL for protected specimen brush or <106 CFUs/mL for tracheal aspirate), obtained in the absence of pneumonia or exacerbation during the 6 months before the ICU admission.

• Patient under guardianship or curatorship