Effect of post-pyloric feeding by spiral nasoenteric tubes on ventilator-associated pneumonia in neurocritical care patients: a retrospective analysis of three clinical randomized controlled trials / 中华危重病急救医学

ABSTRACT

To explore the effect of post-pyloric feeding by spiral nasoenteric tubes on ventilator-associated pneumonia (VAP) in neurocritical care patients. Methods A retrospective study was performed to analyze the clinical data of 175 neurocritical care adult patients with mechanical ventilation (MV) more than 48 hours, who were enrolled in three randomized controlled trials (RCT) conducted by Guangdong Provincial People's Hospital for post-pyloric tube placement between April 2012 to March 2019. The following patient clinical data were collected when patients were enrolled gender, age, neurologic diagnosis, comorbidities, medication, endotracheal reintubation, bronchoscope treatment, the distal site of nasoenteric tubes, and acute physiology and chronic health evaluation Ⅱ(APACHEⅡ) score, sequential organ failure assessment (SOFA) score, Glasgow coma scale (GCS) score, and acute gastrointestinal injury (AGI) grade assessed. Patients were divided into VAP group and non-VAP group according to the occurrence of VAP, and the differences of each index between the two groups were compared. Then the influencing factors of P < 0.1 were included in multivariate Logistic regression analysis to identify the potential risk factors affecting the incidence of VAP. Furthermore, patients were divided into gastric feeding group and post-pyloric feeding group according to the distal site of nasoenteric tubes, and subgroup analysis was performed to evaluate the variety of VAP in patients with different tube sites and status. Results ① Forty-two patients occurred VAP in 175 MV patients, and the incidence of VAP was 24.0%. ② Univariate analysis showed the P value of post-pyloric feeding, APACHE Ⅱscore, GCS score and bronchoscope treatment were less than 0.1, and post-pyloric feeding and GCS score in VAP group were significantly lower than those in non-VAP group [post-pyloric feeding 19.0% (8/42) vs. 36.8% (49/133), GCS5 (3, 7) vs. 6 (4, 9), both P < 0.05]. Multivariate Logistic regression analysis indicated that post-pyloric feeding was independent protective factor [odds ratio (OR) = 0.360, 95% confidence internal (95%CI) = 0.151-0.857, P = 0.021] and bronchoscope treatment was the independent risk factor (OR = 2.210, 95%CI = 1.051-4.647, P = 0.036) for VAP. ③ The incidence of VAP was 28.8% (34/118), 0% (0/4), 8.3% (1/12), 26.7% (4/15), 22.2% (2/9) and 5.9% (1/17) respectively when tube tip in stomach, D1, D2, D3, D4 and jejunum confirmed by abdominal radiography. Post-pyloric feeding in each proportion seemed to present lower VAP rate compared with gastric feeding, however, no significant difference was found (all P > 0.05). ④ The incidence of VAP in post-pyloric feeding group was significantly lower than that in gastric feeding group [14.0% (8/57) vs. 28.8% (34/118), OR = 0.403, 95%CI = 0.173-0.941, P = 0.032]. Lower VAP rate appeared on patients with SOFA < 12 (OR = 0.392, 95%CI = 0.154-0.995, P = 0.044) and AGI grade ≥Ⅱ (OR =0.086, 95%CI = 0.011-0.705, P = 0.006) fed by post-pyloric route according to the result of subgroup analysis stratified by age, gender, APACHEⅡ score, SOFA score and AGI grade. Conclusion Post-pyloric feeding would decrease the incidence of VAP in neurocritical care patients on MV.