Lung Ultrasound Protocol and Quality Control of Image Interpretation Using an Adjudication Panel in the Household Air Pollution Intervention Network (HAPIN) Trial

Ultrasound Med Biol. 2023 May;49(5):1194-1201. doi: 10.1016/j.ultrasmedbio.2023.01.005. Epub 2023 Feb 19.

Abstract

Objective: Lung ultrasound (LUS) is an alternative to chest radiography to confirm a diagnosis of pneumonia. For research and disease surveillance, methods to use LUS to diagnose pneumonia are needed.

Methods: In the Household Air Pollution Intervention Network (HAPIN) trial, LUS was used to confirm a clinical diagnosis of severe pneumonia in infants. We developed a standardized definition of pneumonia, protocols for recruitment and training of sonographers, along with LUS image acquisition and interpretation. We use a blinded panel approach to interpretation with LUS cine-loops randomized to non-scanning sonographers with expert review.

Discussion: We obtained 357 lung ultrasound scans: 159, 8 and 190 scans were collected in Guatemala, Peru and Rwanda, respectively. The diagnosis of primary endpoint pneumonia (PEP) required an expert tie breaker in 181 scans (39%). PEP was diagnosed in 141 scans (40%), not diagnosed in 213 (60%), with 3 scans (<1%) deemed uninterpretable. Agreement among the two blinded sonographers and the expert reader in Guatemala, Peru and Rwanda was 65%, 62% and 67%, with a prevalence-and-bias-corrected kappa of 0.30, 0.24 and 0.33, respectively.

Conclusion: Use of standardized imaging protocols, training and an adjudication panel resulted in high confidence for the diagnosis of pneumonia using LUS.

Trial registration: ClinicalTrials.gov NCT02944682.

Keywords: Developing countries; Imaging; Infant; Pneumonia; Research protocol; Respiratory tract infections; Ultrasound.

Publication types

  • Clinical Trial Protocol
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Air Pollution*
  • Humans
  • Infant
  • Lung / diagnostic imaging
  • Pneumonia*
  • Quality Control
  • Randomized Controlled Trials as Topic
  • Thorax
  • Ultrasonography / methods

Associated data

  • ClinicalTrials.gov/NCT02944682