Evaluation of nutritional status in lung transplant recipients and its correlation with post-transplant short-term prognosis: a retrospective study.

Background: Lung transplantation is an effective treatment for saving the lives of patients with end-stage lung disease (ESLD). Lung transplant-related morbidity and mortality has significantly higher than other solid organ transplants. Among the pre-transplant variables that affect the survival rate after transplantation, nutritional status are associated with poor survival rate. In order to provide basis for formulating nutritional evaluations for lung transplant recipients in the future, we retrospectively analyzed the nutritional status of lung transplantation recipients and explore its correlation with the short-term prognosis.

Methods: This retrospective cohort study included patients who were hospitalized in 2020 and underwent lung transplant surgery at Shanghai Pulmonary Hospital. Inclusion criteria: (I) aged ≥18 years; (II) have been diagnosed with ESLD; (III) have received no other effective treatments; (IV) have undergone a transplantation at Shanghai Pulmonary Hospital. We summarized the patients' general information, including their sex, age, major lung disease etc. And we also collected nutritional status, such as Nutritional Risk Screening 2002 (NRS 2002), subjective global assessment (SGA) and nutritional-related indicators, including albumin, prealbumin, retinol-binding protein etc. before surgery and 1 month after surgery. In addition, we collected postoperative drainage volume, length of stay in intensive care unit (ICU), total hospital days, and hospitalization costs to evaluate the short-term prognosis.

Results: A total of 33 lung transplant recipients were included and successfully underwent surgery. Of the patients, 16 had preoperative NRS 2002 scores ≥3 points, of whom 7 were assessed by the SGA as having mild-moderate malnutrition and 9 as having severe malnutrition. The albumin indexes of these 16 patients, including their prealbumin, and calcium contents, were significantly lower than those of patients with NRS scores <3. Patients with preoperative NRS scores ≥3 had higher drainage volumes, longer hospitalization times, and higher total hospitalization costs than those with NRS scores <3.

Conclusions: Lung transplant recipients have a higher incidence of nutritional risk and malnutrition, which seriously affects their short-term prognosis. Thus, in clinical practice, lung transplant recipients should be screened for nutritional risk and provided preoperative nutritional support to maintain a good preoperative status to improve their prognosis.