Gastric xenon trapping mimicking COPD: Recognition using an effervescent agent

Richard L. Wahl

Research output: Contribution to journalArticlepeer-review


Trapping of xenon 133 in the stomach due to gas swallowing can mimic xenon 133 retention in the left lower lobe due to obstructive lung disease on pulmonary ventilation/perfusion studies. In such cases, ingestion of sodium citrate-bicarbonate-simethicone crystals, which from CO2 gas on contact with water, can distend the xenoncontaining stomach and allow clear delineation of its gastric location. This approach is useful in selected cases and may help avoid false-positive diagnoses of obstructive airways disease.

Original languageEnglish (US)
Pages (from-to)155-157
Number of pages3
JournalEuropean Journal of Nuclear Medicine
Issue number3
StatePublished - Jul 1986
Externally publishedYes


  • Chronic obstructive lung disease
  • Pulmonary embolism detection
  • V/Q scanning

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


Dive into the research topics of 'Gastric xenon trapping mimicking COPD: Recognition using an effervescent agent'. Together they form a unique fingerprint.

Cite this