Hematopoietic stem cell transplantation: pulmonary function tests and post-transplant mortality

Area of Science:

• Pulmonary Medicine
• Hematology
• Transplantation Immunology

Background:

• Hematopoietic stem cell transplantation (HSCT) is a complex procedure with significant risks.
• Assessing pre-transplant patient condition is crucial for predicting outcomes.
• Pulmonary complications are a major cause of morbidity and mortality post-HSCT.

Purpose of the Study:

• To investigate the association between pre-transplant pulmonary function test (PFT) results and mortality following allogeneic HSCT.
• To identify specific PFT parameters that predict post-HSCT survival.

Main Methods:

• Prospective study of 54 patients over 15 years old undergoing allogeneic HSCT.
• Pre-HSCT spirometry, lung volumes, and DLCO measurements were performed.
• Post-HSCT PFTs were repeated at 6 months, 1 year, and 2 years.
• Survival analysis utilized Kaplan-Meier curves, log-rank tests, and Cox regression models.

Main Results:

• Pre-HSCT PFTs were normal in 74.1% of patients.
• Overall two-year mortality was 42.6%, with septicemia and respiratory insufficiency being primary causes.
• Pre-HSCT spirometry alterations (RR=3.2, p=0.016) and unrelated donors (RR=9.0, p<0.001) were significantly associated with increased post-HSCT mortality.

Conclusions:

• Pre-HSCT spirometry is valuable for establishing baseline pulmonary function and risk stratification.
• While abnormal spirometry indicates a higher risk of mortality, it should not be considered an absolute contraindication for HSCT.
• Further research may explore interventions to mitigate pulmonary risks in high-risk patients.