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  • Title: CO2 Cystoscopy for Evaluation of Ureteral Patency.
    Author: Oliveira MAP, Raymundo TS, Pereira TRD, Lima FV, da Silva DEA.
    Journal: J Minim Invasive Gynecol; 2019; 26(3):558-563. PubMed ID: 30165187.
    Abstract:
    Gynecologic surgery is associated with various perioperative complications, especially urinary tract injuries. Intraoperative cystoscopy plays an important role in allowing assessment of the bladder to ensure the absence of injuries. Verification of the urinary jets from the ureters is a fundamental step that is not always easy to accomplish. Dyes are frequently used, but these are not always available and are associated with adverse effects. The present study aimed to demonstrate the use of CO2 as a medium for distension during cystoscopy. A total of 47 patients underwent CO2 cystoscopy after laparoscopic hysterectomy (n = 26) or bladder endometriosis nodule resection (n = 21). In all patients, the ureteral jets were readily identified, leaving no doubt as to their patency. The median interval between the onset of cystoscopy and the view of jetting from both ureteral ostia was 145 seconds (range, 80-300 seconds). All cystoscopies were normal, and no patient had any signs of accidental urinary tract injury in the follow-up period. Two patients experienced mild urinary tract infection. This cystoscopy technique using CO2 is fast, easy, safe, and efficient. We recommend bladder distension with CO2 as a reasonable alternative technique when cystoscopy is required during gynecologic procedures.
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