[Ultrasonographic studies of the gallbladder function in gastrectomized patients].
D005704:Gallbladder / Q000503:physiopathology*; D005743:Gastrectomy; D006801:Humans; D011183:Postoperative Complications; D014054:Tomography / Q000379:methods*; D014463:Ultrasonography; D014628:Vagotomy