Assertion: cephalic vein | /r/HasProperty | evaluated before operation
Facets:
value: by phlebography
type: OTHER
value: by doppler ultrasound
type: OTHER
Source sentences:
text: The cephalic vein often is abused in the forearm by frequent venipunctures and intravenous infusions, but it usually is available in the upper arm where it may be evaluated before operation by phlebography or Doppler ultrasound (duplex