The main objective of the study is to assess the quality of the resection, defined as the presence of detrusor muscle in the resected tissue.~The secondary objetives are:~Compare the surgical time, hospital stay, urinary catheterization time and incidence of complications.~Compare tumor recurrence after one year of follow up.~Determine the number of re-TURB as a consequence of the absence of muscle layer in the sample or artifacts (Tx)~Establish the incidence of conversions as a consequence of difficulties in the technique or intraoperative bleeding.~Compare the degree of satisfaction of the surgeon
This is a prospective, randomized, randomized and single-blind study in patients diagnosed with primary bladder CV. Patients diagnosed by cystoscopy of a bladder tumor and with indication for endoscopic surgical treatment, who meet the inclusion criteria, and who sign the Informed Consent (IC), will be randomized.