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Revista del Instituto de Medicina Tropical

Print version ISSN 1996-3696


GARAY, Zunilda et al. Impact of Pneumonias Associated with Mechanical Ventilation in Mortality in an Adult Intensive Care Unit. Rev. Inst. Med. Trop. [online]. 2018, vol.13, n.1, pp.24-31. ISSN 1996-3696.


Pneumonia associated with mechanical ventilation (VAP) represents the most common hospital infection, associated with a high mortality, morbidity and costs. The objective of the study was to determine the incidence, isolated microorganisms and the mortality in pneumonia associated with mechanical ventilation (VAP).


A descriptive with analytical component, retrospective study with a quantitative approach of patients admitted to the Adult Intensive Care Unit (AICU) of the Hospital de Clínicas in the years 2015-2016. All patients were included with criteria of pneumonia associated with mechanical ventilation (VAP). The data was obtained from active and selective surveillance.


During the study period, 877 patients were admitted at the AICU, of which 809 patients required 809 (92,2%) Mechanical Respiratory Assistance. The VAP was 16,7 / 1,000 days of Mechanical Ventilation. The most frequent microorganisms isolated were A. baumannii complex 30% (35/113),P. aeruginosa 29% (33/113) and K. pneumoniae 23% (15/113), and 91% (32/35) of Acinetobacter spp, 87% (29/33) of P. aeruginosa and 58% (15/26) of K. pneumoniae were multiresistant. The mortality was significantly higher in the patients with NAVM (52,3% vs 31,3%) (p<0,0002; OR=2,5 (1,5 - 4,1).


The incidence rate of VAP was high. The Gram-negative bacilli were the most frequent microorganisms isolated. The study determined a high frequency of multi-resistant microorganism. The mortality associated with VAP was significantly higher than in those patients who did not develop VAP.

Keywords : Ventilator associated Pneumonia; multi - resistant microorganism..

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