15. CLINICAL CHARACTERISTICS, PARACLINICAL FINDINGS, AND TREATMENT OUTCOMES OF PATIENTS WITH VENTILATOR-ASSOCIATED PNEUMONIA IN THE INTENSIVE CARE UNIT OF MILITARY HOSPITAL 175

Bui Duc Thanh1, Tran Quoc Viet1
1 Military Hospital 175

Main Article Content

Abstract

Objective: To describe the clinical and paraclinical characteristics and evaluate treatment outcomes of patients with ventilator-associated pneumonia (VAP).


Subjects and Methods: This is a cross-sectional descriptive study conducted on 76 patients diagnosed with ventilator-associated pneumonia, treated in the Intensive Care Unit at Military Hospital 175 from November 2023 to December 2024.


Results: Among the 76 patients studied, late-onset VAP (≥5 days) accounted for a higher proportion (63.2%) compared to early-onset VAP (<5 days) (36.8%). The majority were male (65.8%) with a mean age of 62.3 ± 14.1 years. Common comorbidities included diabetes mellitus (18.4%) and chronic obstructive pulmonary disease (COPD) (11.8%). Most patients had cerebral hemorrhage (59.2%) and required intubation due to coma (60.5%). Clinical signs included fever (72.4%), leukocytosis (76.3%), hypoxemia (PaO₂/FiO₂ <200 in 51.3%), with a mean Glasgow Coma Scale score of 9.1 ± 2.5 and SOFA score of 5.1 ± 2.4. Gram-negative bacteria were predominant, with Klebsiella pneumoniae (22.4%), Pseudomonas aeruginosa (19.7%), and Acinetobacter baumannii (18.4%) being the most frequently isolated pathogens. The average duration of mechanical ventilation was 8.2 ± 2.6 days, and ICU stay was 10.5 ± 3.1 days. The clinical stabilization rate was 63.2%. Late-onset VAP was significantly associated with age ≥65 years (p=0.012), leukocytosis (p=0.048), elevated procalcitonin (p=0.004), hypoxemia (p=0.001), and multidrug-resistant (MDR) bacteria (p=0.003).


Conclusion: Late-onset VAP accounted for the majority of cases (63.2%), predominantly affecting elderly patients and associated with MDR Gram-negative bacteria. Risk factors such as hypoxemia and elevated procalcitonin were significantly related. The findings highlight the critical need for stringent infection control measures in patients requiring prolonged mechanical ventilation.

Article Details

References

[1] Kalil AC, Metersky ML, Klompas M, Muscedere J, Sweeney DA, Palmer LB, et al. Management of Adults With Hospital-acquired and Ventilator-associated Pneumonia: 2016 Clinical Practice Guidelines by the Infectious Diseases Society of America and the American Thoracic Society. Clin Infect Dis. 2016 Sep 1;63(5):e61–111.
[2] Fernando SM, Tran A, Cheng W, Klompas M, Kyeremanteng K, Mehta S, et al. Diagnosis of ventilator-associated pneumonia in critically ill adult patients—a systematic review and meta-analysis. Intensive Care Med. 2020;46(6):1170–9.
[3] Muscedere JG, Day A, Heyland DK. Mortality, attributable mortality, and clinical events as end points for clinical trials of ventilator-associated pneumonia and hospital-acquired pneumonia. Clin Infect Dis. 2010 Aug 1;51 Suppl 1:S120-125.
[4] Gunalan A, Sistla S, Ramanathan V, Sastry AS. Early- vs Late-onset Ventilator-associated Pneumonia in Critically Ill Adults: Comparison of Risk Factors, Outcome, and Microbial Profile. Indian Journal of Critical Care Medicine. 2023 May 31;27(6):411–5.
[5] Restrepo MI, Peterson J, Fernandez JF, Qin Z, Fisher AC, Nicholson SC. Comparison of the Bacterial Etiology of Early-Onset and Late-Onset Ventilator-Associated Pneumonia in Subjects Enrolled in 2 Large Clinical Studies. Respiratory Care. 2013 Jul;58(7):1220–5.
[6] Kumari M, Verma S, Venkatesh V, Gupta P, Tripathi P, Agarwal A, et al. Emergence of blaNDM-1 and blaVIM producing Gram-negative bacilli in ventilator-associated pneumonia at AMR Surveillance Regional Reference Laboratory in India. PLOS ONE. 2021 Sep 8;16(9):e0256308.
[7] Ben Lakhal H, M’Rad A, Naas T, Brahmi N. Antimicrobial Susceptibility among Pathogens Isolated in Early- versus Late-Onset Ventilator-Associated Pneumonia. Infectious Disease Reports. 2021 Jun;13(2):401–10.
[8] Forel JM, Voillet F, Pulina D, Gacouin A, Perrin G, Barrau K, et al. Ventilator-associated pneumonia and ICU mortality in severe ARDS patients ventilated according to a lung-protective strategy. Critical Care. 2012 Apr 18;16(2):R65.
[9] Gunalan A, Sistla S, Ramanathan V, Sastry AS. Early- vs Late-onset Ventilator-associated Pneumonia in Critically Ill Adults: Comparison of Risk Factors, Outcome, and Microbial Profile. Indian Journal of Critical Care Medicine. 2023 May 31;27(6):411–5.
[10] Solanki RN, Borisagar GB, Dedun AR. Clinical, Microbiological and Mortality Profile in Ventilator-associated Pneumonia in a Tertiary Care Hospital in Western India. The Indian Journal of Chest Diseases and Allied Sciences. 2022 Nov 18;60(3):135–9.