[Loop suction biopsy of the urinary bladder]

During the last year we used a selective catheter cell aspiration method besides lavage cytology of the bladder. We used a special 7 Charr. Teflon catheter with a metal scraper at its tip. In our clinical experience we see the following advantages of selective catheter cell aspiration: 1. there are no artificial changes in cells caused by urine effects. 2. large and intact cell clusters can be aspirated from the bladder mucous membrane. 3. selective aspiration of cell clusters from suspicious areas of the bladder now is possible. Lavage urine samples include all kinds of cells of the whole urinary tract. No cystoscopic examination is necessary. In special cases we use selective catheter cell aspiration in addition to lavage urine for cytologic examination.