Risks Factors and Outcome of Recurrences in Patients With Ventilator-Associated Pneumonias (REVAP) (REVAP)

Ventilator-associated pneumonia (VAP) is a frequent and serious complication in the ICU, defined by the development of a lung infection in patients ventilated for more than 48 hours. The incidence rate of this condition exceeds 18 episodes per 1000 days of mechanical ventilation in Europe. This nosocomial infection is associated with the highest mortality, ranging from 24% to 76% depending on the series. Reducing the incidence of VAP remains a challenge for clinicians, as evidenced by the many recent recommendations that have led to "bundles" to prevent the onset of this complication. Despite this, these recommendations do not propose a strategy to prevent the recurrence of PAVM, a frequent entity with a reported incidence of 25-35% and a non-consensual definition that increases antibiotic consumption, duration of mechanical ventilation and length of stay in the ICU .

In fact, these recurrences can be linked to:

• Intrinsic patient risk factors (immunosuppression, severity of disease, major inflammatory response, reason for initial admission),
• Inappropriate initial antibiotic therapy (type, duration and dose administered),
• Characteristics specific to the pathogens encountered (virulence factors or resistance),
• Intercurrent complications during management of the initial pneumonia (ARDS, abscess, pleural empyema).

Given the frequency of these recurrences, and the persistent doubts about the role of terrain and pathogen characteristics in their genesis, it seems appropriate to look at risk factors that could help anticipate these events.

The aim of our study will be to identify the risk factors and mortality associated with the occurrence of a recurrence of VAP in patients hospitalized in the intensive care unit.

An essential first step in this work will be to identify and then use the most consensual definition of recurrence of VAP, encompassing recurrence, persistence and superinfection. We will use the definitions in the protocol for the ASPIC trial, which is currently undergoing enrolment.

The second step is to identify risk factors for recurrence. By identifying these factors, it could be possible to propose a prognostic score that would enable careful monitoring (or modification of antibiotic therapy) of patients most at risk of recurrence. Such a score could then be evaluated in a prospective study.

Study Overview

• Status: Not yet recruiting
• Conditions: Ventilator-associated Pneumonia
• Intervention / Treatment: Other: observational

Detailed Description

Ventilator-associated pneumonia (VAP) is a frequent and serious complication in the ICU, defined by the development of a lung infection in patients ventilated for more than 48 hours. The incidence rate of this condition exceeds 18 episodes per 1000 days of mechanical ventilation in Europe. This nosocomial infection is associated with the highest mortality, ranging from 24% to 76% depending on the series. Reducing the incidence of VAP remains a challenge for clinicians, as evidenced by the many recent recommendations that have led to "bundles" to prevent the onset of this complication. Despite this, these recommendations do not propose a strategy to prevent the recurrence of PAVM, a frequent entity with a reported incidence of 25-35% and a non-consensual definition that increases antibiotic consumption, duration of mechanical ventilation and length of stay in the ICU (1,2).

In fact, these recurrences can be linked to:

• Intrinsic patient risk factors (immunosuppression, severity of disease, major inflammatory response, reason for initial admission),
• Inappropriate initial antibiotic therapy (type, duration and dose administered),
• Characteristics specific to the pathogens encountered (virulence factors or resistance),
• Intercurrent complications during management of the initial pneumonia (ARDS, abscess, pleural empyema).

Given the frequency of these recurrences, and the persistent doubts about the role of terrain and pathogen characteristics in their genesis, it seems appropriate to look at risk factors that could help anticipate these events.

The aim of our study will be to identify the risk factors and mortality associated with the occurrence of a recurrence of VAP in patients hospitalized in the intensive care unit.

An essential first step in this work will be to identify and then use the most consensual definition of recurrence of VAP, encompassing recurrence, persistence and superinfection. We will use the definitions in the protocol for the ASPIC trial (3), which is currently undergoing enrolment.

The second step is to identify risk factors for recurrence. By identifying these factors, it could be possible to propose a prognostic score that would enable careful monitoring (or modification of antibiotic therapy) of patients most at risk of recurrence. Such a score could then be evaluated in a prospective study.

1. Combes A, Figliolini C, Trouillet J-L, Kassis N, Dombret M-C, Wolff M, et al. Factors predicting ventilator-associated pneumonia recurrence. Crit Care Med. 2003 Apr;31(4):1102-1107.
2. Combes A, Luyt C-E, Fagon J-Y, Wolff M, Trouillet J-L, Chastre J, et al. Early predictors for infection recurrence and death in patients with ventilator-associated pneumonia. Crit Care Med. 2007 Jan;35(1):146-154.
3. Foucrier A, Roquilly A, Bachelet D, Martin-Loeches I, Bougle A, Timsit JF, Montravers P, Zahar JR, Eloy P, Weiss E; ASPIC study group. Antimicrobial Stewardship for Ventilator Associated Pneumonia in Intensive Care (the ASPIC trial): study protocol for a randomised controlled trial. BMJ Open. 2023 Feb 21;13(2):e065293. doi: 10.1136/bmjopen-2022-065293. PMID: 36810173; PMCID: PMC9944671.

• Study Type: Observational
• Enrollment (Estimated): 996

Contacts and Locations

• Study Contact: Name: Adrien Bouglé, MD; Phone Number: +33 1 42 16 29 91; Email: adrien.bougle@aphp.fr

Study Locations

• France
  • Paris, France, 75013
    • Hôpital La Pitié-Salpêtrière
    • Contact: Adrien BOUGLE, MD

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

• Sampling Method: Probability Sample

Study Population

Adults patients having presented an episode of ventilator-associated pneumonia

Description

Inclusion Criteria:

• Adult patient

• Having presented an episode of ventilator-associated pneumonia defined as the association in a patient undergoing invasive mechanical ventilation ≥ 48h:

  • Radiological signs: two successive chest X-rays showing new or progressive pulmonary infiltrates (in the absence of a medical history of underlying heart or lung disease, a single chest X-ray is sufficient).

    • And at least one of the following signs:
  • Fever > 38.0˚ C without any other cause

  • Leukocytes < 4 × 109 l-1 or > 12 × 109 l-1

    • And at least two of the following signs:
  • Purulent tracheobronchial secretions
  • Cough or dyspnea
  • Decreased oxygenation or increased oxygen requirements, or need for respiratory assistance
• Patient does not object to the use of his/her data for this research

Exclusion Criteria:

• Opposition to the use of personnal data
• People under legal protection (curatorship, guardianship) or safeguard of justice

Study Plan

How is the study designed?

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
Patients with Ventilator-associated pneumonia; Patients having presented an episode of ventilator-associated pneumonia, undergoing invasive mechanical ventilation ≥ 48h	Other: observational; No intervention, observational group

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Mortality at 28 days	Mortality at 28 days, verify if patient died 28 days after Ventilator-associated pneumonia	28 days after ICU admission

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of Ventilator-associated pneumonia recurrences	Number of Ventilator-associated pneumonia recurrences during ICU stay	During inclusion period (from 01JAN2021 to 31DEC2022)
Number of days without mechanical ventilation at D28	Number of days without mechanical ventilation at D28	28 days after ICU admission
Number of days without renal replacement therapy at D28	Number of days without renal replacement therapy at D28	28 days after ICU admission
Number of days without catecholamines at D28	Number of days without catecholamines at D28	28 days after ICU admission
Number of days without antibiotics at D28	Number of days without antibiotics at D28	28 days after ICU admission
MDR acquisition rate	multiresistant bacteriaacquisition rate	During ICU stay
Length of stay in intensive care unit	Length of stay in intensive care unit	During inclusion period (from 01JAN2021 to 31DEC2022)
Length of hospital stay	Length of hospital stay	During inclusion period (from 01JAN2021 to 31DEC2022)
Number of persistent Ventilator-associated pneumonia	Number of persistent Ventilator-associated pneumonia	During inclusion period (from 01JAN2021 to 31DEC2022)
Number of superinfections of Ventilator-associated pneumonia	Number of superinfections of Ventilator-associated pneumonia	During inclusion period (from 01JAN2021 to 31DEC2022)

Collaborators and Investigators

• Sponsor: Société Française d'Anesthésie et de Réanimation
• Investigators: Study Chair: Adrien Bouglé, MD, Hôpital La Pitié-Salpêtrière

Publications and helpful links

General Publications

• Combes A, Figliolini C, Trouillet JL, Kassis N, Dombret MC, Wolff M, Gibert C, Chastre J. Factors predicting ventilator-associated pneumonia recurrence. Crit Care Med. 2003 Apr;31(4):1102-7. doi: 10.1097/01.CCM.0000059313.31477.2C.
• Combes A, Luyt CE, Fagon JY, Wolff M, Trouillet JL, Chastre J. Early predictors for infection recurrence and death in patients with ventilator-associated pneumonia. Crit Care Med. 2007 Jan;35(1):146-54. doi: 10.1097/01.CCM.0000249826.81273.E4.
• Foucrier A, Roquilly A, Bachelet D, Martin-Loeches I, Bougle A, Timsit JF, Montravers P, Zahar JR, Eloy P, Weiss E; ASPIC study group. Antimicrobial Stewardship for Ventilator Associated Pneumonia in Intensive Care (the ASPIC trial): study protocol for a randomised controlled trial. BMJ Open. 2023 Feb 21;13(2):e065293. doi: 10.1136/bmjopen-2022-065293.

Study record dates

Study Major Dates

• Study Start (Estimated): October 15, 2023
• Primary Completion (Estimated): April 15, 2024
• Study Completion (Estimated): July 15, 2024

Study Registration Dates

• First Submitted: September 27, 2023
• First Submitted That Met QC Criteria: September 27, 2023
• First Posted (Actual): October 4, 2023

Study Record Updates

• Last Update Posted (Actual): October 4, 2023
• Last Update Submitted That Met QC Criteria: September 27, 2023
• Last Verified: September 1, 2023

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Pathologic Processes; Infections; Respiratory Tract Infections; Respiratory Tract Diseases; Lung Diseases; Disease Attributes; Cross Infection; Iatrogenic Disease; Healthcare-Associated Pneumonia; Pneumonia; Recurrence; Pneumonia, Ventilator-Associated
• Other Study ID Numbers: REVAP / 2022-11

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED
• IPD Plan Description: unplanned for the moment

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No