# Routine Chest X-Rays in Critical Bronchiolitis Do Not Improve Outcomes

## TL;DR

Routine chest X-rays in critically ill bronchiolitis patients are common but may lead to longer ICU stays and higher respiratory support needs.

## Contribution

This study shows that routine chest X-rays in critical bronchiolitis do not improve outcomes and may worsen ICU length of stay.

## Key findings

- Patients who received CXRs had significantly longer ICU-LOS and ICU-LRS.
- There was no difference in predicted illness severity between CXR and no-CXR groups.
- The no-CXR group had a greater difference between actual and predicted ICU-LOS.

## Abstract

Background: Routine chest X-rays (CXR) are not recommended by the American Academy of Pediatrics in bronchiolitis, yet remain a mainstay in diagnostics. We aimed to understand the impact of obtaining CXRs in patients with critical bronchiolitis, assessing intensive care unit length of stay (ICU-LOS) and intensive care unit level of respiratory support (ICU-LRS). Methods/Design: This single-center retrospective cohort study assessed children less than three years of age admitted to the PICU, pediatric step-down ICU, and pediatric cardiac ICU. Two groups were used for analysis: patients with CXR and no-CXR. The primary outcome was the difference in ICU-LOS and ICU-LRS between the groups. The critical bronchiolitis score (CBS) was used to calculate a predicted ICU-LOS and ICU-LRS. The secondary outcome was the difference between actual and predicted ICU-LOS and ICU-LRS, comparing the groups. Results: Of the 107 patients included, 65 patients (61%) received a CXR. Patients who received a CXR had significantly longer ICU-LOS (p = 0.01) and ICU-LRS (p = 0.02), despite no difference in predicted illness severity (ICU-LOS, p = 0.4; ICU-LRS, p = 0.3). The difference between actual and predicted ICU-LOS was greater in the no-CXR group (–1.4 days) compared to the CXR group (–0.8 days; p = 0.04). A similar trend was observed in ICU-LRS (–0.1 vs. –0.6 days; p = 0.1), though not statistically significant. Conclusions: Routine CXRs are common in critically ill bronchiolitis patients and may be associated with longer ICU-LOS and ICU-LRS, despite similar illness severity.