Impact of the Duration of Antibiotics on Clinical Events in Patients With Pseudomonas Aeruginosa Ventilator-associated Pneumonia (iDIAPASON)
NCT ID: NCT02634411
Last Updated: 2021-10-20
Study Results
Results pending
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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Recruitment Status
COMPLETED
Clinical Phase
NA
Total Enrollment
190 participants
Study Classification
INTERVENTIONAL
Study Start Date
2016-06-03
Study Completion Date
2018-08-16
Brief Summary
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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
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
Detailed Description
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Ventilator-associated pneumonia (VAP) is a major cause of morbidity and mortality in the ICU, accounting for 25% of infections in intensive care units (Réseau RAISIN 2012). From 1975 to 2003, the incidence of hospital-acquired pneumonia caused by Pseudomonas aeruginosa (PA) has almost doubled, from 9.6% to 18.1%. In a US national large-scale survey, PA was the most frequently isolated gram-negative aerobic bacterium from ICUs (23%) and also the most frequent bacterium isolated from the respiratory tract (31.6%).
PA-VAP is associated with a high mortality ranging from 40% up to 69%, and with high rates of recurrence despite adequate antimicrobial therapy. In a large randomized trial regarding the optimal duration of antibiotic therapy in overall VAPs, the rate of recurrence among the subgroup of non-fermenting Gram negative bacilli (NF-GNB) documented VAP varied between 19.0% and 32.8%, according to the randomization arm. Finally, a recently published cohort about 393 PA-VAP in 314 patients, the composite criteria failure treatment (death and recurrence) occured in 112 cases (28.5%).
Hypothesis A short duration antibiotherapy (8 days) vs. long duration antibiotherapy (15 days) in treatment of Pseudomonas aeruginosa Ventilator-Associated Pneumonia (PA-VAP) is safe and not associated with an increased mortality or recurrence rate of PA-VAP.
The demonstration of this hypothesis could lead to decrease antibiotic exposure during the hospitalization in the Intensive Care Unit (ICU) and in turn reduce the acquisition and the spread of multidrug-resistant pathogens (MDR).
Objectives
1. Primary objective To assess the non-inferiority of a short duration of antibiotics (8 days) vs. prolonged antibiotic therapy (15 days) in Pseudomonas aeruginosa ventilator-associated pneumonia (PA-VAP) on morbi-mortality at 90 days.
2. Secondary objectives
To compare between short and long duration of antibiotics on:
* mortality in the ICU
* morbidity in the ICU (mechanical ventilation, duration of hospitalization)
* exposure and acquisition of MDR during hospitalization
* number and types of extrapulmonary infections
Plan for the research
1. Concise description of the primary and secondary assessment criteria
\- Primary assessment criterion: A composite endpoint combining Day-90 mortality and PA-VAP recurrence rate during hospitalization in the ICU (within 90 days).
Recurrence will be defined a posteriori by 3 independent experts with predefined criteria: clinical suspicion of VAP (≥ 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). associated with a positive quantitative culture of a respiratory sample (bronchoalveolar lavage fluid (significant threshold ≥104 colony-forming units/mL) or plugged telescopic catheter (significant threshold ≥103 colony-forming units/mL) or quantitative endotracheal aspirate distal pulmonary secretion samples (significant threshold ≥106 colony-forming units/mL)).
* Secondary assessment criteria:
1. D30 and D90 mortality rate (%)
2. Morbidity by:
Duration of mechanical ventilation (days) Duration of hospitalization in ICU (days)
3. Exposure to antibiotics during the hospitalization in the ICU (days)
4. Number and types of extrapulmonary infections during the hospitalization in the ICU (n)
5. Acquisition of MDR during the hospitalization in the ICU (swab sample of rectum and anterior nares)
2. Description of research methodology
Randomized, open-labeled non inferiority trial comparing to parallel groups:
* 8 days of antibiotic therapy
* 15 days of antibiotic therapy
Antibiotic therapy Antibiotic treatment should be started just after realization of bacteriological sampling, without waiting for the result. The choice of initial antibiotic therapy will be left to the discretion of the physician but will be essentially based on the clinical context, previously antibiotic therapy, the presence or absence of risk factors for MDR (antibiotics or hospitalization in previous 90 days, current hospitalization ≥ 5 days, MV ≥ 5 days, supported in a dialysis center or residency in a nursing home), local epidemiological data, and finally if the patient is already known as being colonized by a MDR. Investigators would be strongly encouraged to convert this initial regimen into a narrow- spectrum therapy, based on culture results.
All antibiotics would be withdrawn, either at the end of day 8 or day 15, according to the randomization assignment, except those prescribed for a documented pulmonary infection recurrence before that day.
An algorithm for the initial prescription of antibiotics will be established in each ICU, the algorithm will be adapted whenever necessary to changes in the local ecology.
Number of centres participating 42 french Intensive Care Units (ICUs)
PA-VAP is associated with a high mortality ranging from 40% up to 69%, and with high rates of recurrence despite adequate antimicrobial therapy. In a large randomized trial regarding the optimal duration of antibiotic therapy in overall VAPs, the rate of recurrence among the subgroup of non-fermenting Gram negative bacilli (NF-GNB) documented VAP varied between 19.0% and 32.8%, according to the randomization arm. Finally, a recently published cohort about 393 PA-VAP in 314 patients, the composite criteria failure treatment (death and recurrence) occured in 112 cases (28.5%).
Hypothesis A short duration antibiotherapy (8 days) vs. long duration antibiotherapy (15 days) in treatment of Pseudomonas aeruginosa Ventilator-Associated Pneumonia (PA-VAP) is safe and not associated with an increased mortality or recurrence rate of PA-VAP.
The demonstration of this hypothesis could lead to decrease antibiotic exposure during the hospitalization in the Intensive Care Unit (ICU) and in turn reduce the acquisition and the spread of multidrug-resistant pathogens (MDR).
Objectives
1. Primary objective To assess the non-inferiority of a short duration of antibiotics (8 days) vs. prolonged antibiotic therapy (15 days) in Pseudomonas aeruginosa ventilator-associated pneumonia (PA-VAP) on morbi-mortality at 90 days.
2. Secondary objectives
To compare between short and long duration of antibiotics on:
* mortality in the ICU
* morbidity in the ICU (mechanical ventilation, duration of hospitalization)
* exposure and acquisition of MDR during hospitalization
* number and types of extrapulmonary infections
Plan for the research
1. Concise description of the primary and secondary assessment criteria
\- Primary assessment criterion: A composite endpoint combining Day-90 mortality and PA-VAP recurrence rate during hospitalization in the ICU (within 90 days).
Recurrence will be defined a posteriori by 3 independent experts with predefined criteria: clinical suspicion of VAP (≥ 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). associated with a positive quantitative culture of a respiratory sample (bronchoalveolar lavage fluid (significant threshold ≥104 colony-forming units/mL) or plugged telescopic catheter (significant threshold ≥103 colony-forming units/mL) or quantitative endotracheal aspirate distal pulmonary secretion samples (significant threshold ≥106 colony-forming units/mL)).
* Secondary assessment criteria:
1. D30 and D90 mortality rate (%)
2. Morbidity by:
Duration of mechanical ventilation (days) Duration of hospitalization in ICU (days)
3. Exposure to antibiotics during the hospitalization in the ICU (days)
4. Number and types of extrapulmonary infections during the hospitalization in the ICU (n)
5. Acquisition of MDR during the hospitalization in the ICU (swab sample of rectum and anterior nares)
2. Description of research methodology
Randomized, open-labeled non inferiority trial comparing to parallel groups:
* 8 days of antibiotic therapy
* 15 days of antibiotic therapy
Antibiotic therapy Antibiotic treatment should be started just after realization of bacteriological sampling, without waiting for the result. The choice of initial antibiotic therapy will be left to the discretion of the physician but will be essentially based on the clinical context, previously antibiotic therapy, the presence or absence of risk factors for MDR (antibiotics or hospitalization in previous 90 days, current hospitalization ≥ 5 days, MV ≥ 5 days, supported in a dialysis center or residency in a nursing home), local epidemiological data, and finally if the patient is already known as being colonized by a MDR. Investigators would be strongly encouraged to convert this initial regimen into a narrow- spectrum therapy, based on culture results.
All antibiotics would be withdrawn, either at the end of day 8 or day 15, according to the randomization assignment, except those prescribed for a documented pulmonary infection recurrence before that day.
An algorithm for the initial prescription of antibiotics will be established in each ICU, the algorithm will be adapted whenever necessary to changes in the local ecology.
Number of centres participating 42 french Intensive Care Units (ICUs)
Conditions
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Ventilator-Associated Pneumonia
Study Design
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Allocation Method
RANDOMIZED
Intervention Model
PARALLEL
Primary Study Purpose
TREATMENT
Blinding Strategy
NONE
Study Groups
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8 days of effective antibiotic treatment
Antibiotic treatment should be started just after realization of bacteriological sampling, and then converted into a narrow-spectrum therapy, based on culture results, for a total duration of effective antibiotic therapy against PA of 8 days.
Group Type
EXPERIMENTAL
8 days of effective antibiotic treatment
Intervention Type
DRUG
Antibiotics used for usual care in PA-VAP treatment : Penicillins, Cephalosporins, Monobactams, Carbapenems, Fluoroquinolones, Aminoglycosides (list not exhaustive).
Antibiotic treatment should be started just after realization of bacteriological sampling, and then converted into a narrow-spectrum therapy, based on culture results, for a total duration of effective antibiotic therapy against pseudomona aeruginosa of 8 days.
15 days of effective antibiotic treatment
Antibiotic treatment should be started just after realization of bacteriological sampling, and then converted into a narrow-spectrum therapy, based on culture results, for a total duration of effective antibiotic therapy against PA of 15 days.
Group Type
SHAM_COMPARATOR
15 days of effective antibiotic treatment
Intervention Type
DRUG
Antibiotics used for usual care in PA-VAP treatment : Penicillins, Cephalosporins, Monobactams, Carbapenems, Fluoroquinolones, Aminoglycosides (list not exhaustive).
Antibiotic treatment should be started just after realization of bacteriological sampling, and then converted into a narrow-spectrum therapy, based on culture results, for a total duration of effective antibiotic therapy against pseudomona aeruginosa of 15 days.
Interventions
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8 days of effective antibiotic treatment
Antibiotics used for usual care in PA-VAP treatment : Penicillins, Cephalosporins, Monobactams, Carbapenems, Fluoroquinolones, Aminoglycosides (list not exhaustive).
Antibiotic treatment should be started just after realization of bacteriological sampling, and then converted into a narrow-spectrum therapy, based on culture results, for a total duration of effective antibiotic therapy against pseudomona aeruginosa of 8 days.
Intervention Type
DRUG
15 days of effective antibiotic treatment
Antibiotics used for usual care in PA-VAP treatment : Penicillins, Cephalosporins, Monobactams, Carbapenems, Fluoroquinolones, Aminoglycosides (list not exhaustive).
Antibiotic treatment should be started just after realization of bacteriological sampling, and then converted into a narrow-spectrum therapy, based on culture results, for a total duration of effective antibiotic therapy against pseudomona aeruginosa of 15 days.
Intervention Type
DRUG
Eligibility Criteria
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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
* 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
* 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
Minimum Eligible Age
18 Years
Eligible Sex
ALL
Accepts Healthy Volunteers
No
Sponsors
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Assistance Publique - Hôpitaux de Paris
OTHER
Sponsor Role
lead
Responsible Party
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Responsibility Role
SPONSOR
Principal Investigators
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Adrien Bouglé, MD
Role: PRINCIPAL_INVESTIGATOR
APHP
Locations
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Anesthesiology and Critical Care Medicine Institut de Cardiologie, Groupe Hospitalier Pitié-Salpêtrière
Paris, , France
Site Status
Countries
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France
References
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Reference Type
BACKGROUND
Vincent JL, Moreno R, Takala J, Willatts S, De Mendonca A, Bruining H, Reinhart CK, Suter PM, Thijs LG. The SOFA (Sepsis-related Organ Failure Assessment) score to describe organ dysfunction/failure. On behalf of the Working Group on Sepsis-Related Problems of the European Society of Intensive Care Medicine. Intensive Care Med. 1996 Jul;22(7):707-10. doi: 10.1007/BF01709751. No abstract available.
Reference Type
BACKGROUND
Foucrier A, Dessalle T, Tuffet S, Federici L, Dahyot-Fizelier C, Barbier F, Pottecher J, Monsel A, Hissem T, Lefrant JY, Demoule A, Constantin JM, Rousseau A, Simon T, Leone M, Bougle A; iDIAPASON Trial Investigators. Association between combination antibiotic therapy as opposed as monotherapy and outcomes of ICU patients with Pseudomonas aeruginosa ventilator-associated pneumonia: an ancillary study of the iDIAPASON trial. Crit Care. 2023 May 30;27(1):211. doi: 10.1186/s13054-023-04457-y.
Reference Type
DERIVED
Bougle A, Foucrier A, Dupont H, Montravers P, Ouattara A, Kalfon P, Squara P, Simon T, Amour J; iDIAPASON study group. Impact of the duration of antibiotics on clinical events in patients with Pseudomonas aeruginosa ventilator-associated pneumonia: study protocol for a randomized controlled study. Trials. 2017 Jan 23;18(1):37. doi: 10.1186/s13063-017-1780-3.
Reference Type
DERIVED
Other Identifiers
Review additional registry numbers or institutional identifiers associated with this trial.
AOM 14515
Identifier Type: OTHER
Identifier Source: secondary_id
IDRCB n°: 2015-A00375-44
Identifier Type: OTHER
Identifier Source: secondary_id
P 140923
Identifier Type: -
Identifier Source: org_study_id