 [ Symptoms ] can i take vicodin if i have had gastric bypass surgery [ Disease ] your doctor should be able to view enough of you cervix to perform an endometrial biopsy typically a special instrument called a tenaculum is used to grasp the cervix and pull it forward so that the biopsy can be performed easily what may actually cause difficultly in performing the biopsy is if your cervical canal is stenotic severely narrowed