Biello-Siegel criteria

• normal (0%)

• low prob (10%)
  • small {<25% of a segment} Q defect(s)
  • matched V/Q defects involving < 1/3 of lung
  • nonsegmental defects (CMG, sm effusions)
  • Q defect << CXR defect

• intermediate prob (20-33%)
  • abnormality not within "low" or "high" category

• high prob (87%)
  • two large {>75% of a segment} mismatches
  • Q defect >> CXR and V

see: V/Q imaging

© 2002, C.E. Kahn, Jr.
2002-04-18