[HST]: 3 weeks s/p left hip endoprosthesis  [SAS]: significant swelling LLE   CAROTID DUPLEX ULTRASOUND    COMPARISON: none    FINDINGS: Gray scale, color doppler and spectral imaging were  performed.  Images submitted electronically.   RIGHT SIDE: There is no significant plaque. No significant stenosis  is identified.  Maximal PSV in the internal carotid is 63 cm/sec.  Normal velocities in CCA and ECA.  ICA/CCA ratio is 1.0  There is  antegrade flow in the vertebral artery.    LEFT SIDE: There is no significant plaque. No significant stenosis.   Maximum PSV in the internal carotid is 80 cm/sec. Normal velocities  in CCA and ECA.  ICA/CCA ratio is 1.1  There is antegrade flow in the  vertebral artery.       IMPRESSION: No significant plaque or stenosis.     ______________________________________    Electronically signed by:AAAAA B CCCCCC, MD Date: 01/01/1901 Time:15:42