difficult enrollment, focus of study no longer of interest

Aspirin is very common in older patients. Therefore many of the investigators patients have aspirin. The aim of the study is to proof that Transurethral Surgery of the bladder or the prostate can be performed with aspirin.

Inclusion Criteria:

• Transurethral surgery of the bladder or prostate, informed consent, age over 18

Exclusion Criteria:

• Oral anticoagulation,