four culture specimens were obtained from each patient in the following sequence : transfundal aspiration , transcervical brush biopsy of the endometrium through a double-lumen catheter , transcervical lavage of the endometrial cavity through a double-lumen catheter , and aspiration of the secretions from the lower uterine segment through a single-lumen catheter .
C0014180
endometrium
C0227844
endometrial cavity