Avaliação da pressão intraluminal em cistorrafias com e sem remendo de serosa intestinal em cadáveres caninos

Abstract

This study aimed to evaluate the maximum intraluminal pressure (MIP) supported by urinary bladders of canine cadavers submitted to cystotomy with subsequent cystorrhaphies with and without intestinal serosal patch supplementation. The experiment was accomplished ex situ. Urinary bladders and bowels were stored in saline solution 0.9% for 48 hours at 5°C. The cystotomies were performed with empty bladders and corresponds to an incision of 2.5 cm long. The MIP was measured with the aid of a pressure transducer coupled to a multiparameter monitor. Two catheters number 6 are inserted through the urethra, by a catheter was infused saline solution 0.9% by infusion pump and by other catheter was connected the pressure transducer. The evaluation of the leakage was by macroscopic method with the help of qualitative filter paper. Two groups were made with 8 urinary bladders each, the first group assessed with conventional suture - cystorrhaphy with suture Cushing's and the second group was evaluated with conventional cystorrhaphy associated with intestinal serosal patch. The measured pressure values were evaluated for its normality the Shapiro-Wilk test and statistical analysis was performed using Student's t test when comparing the groups, the significance level of p<0.05 was adopted in all analyzes. All data had normal distribution (p>0.10) and the results were expressed as mean ± standard deviation. The supported pressure in conventional suture group was 28.88 ± 5.08 mmHg (interval 21 mmHg to 34 mmHg) and serosal patch group 65.38 ± 10.99 mmHg (interval 54 mmHg to 81 mmHg), which is significant result (p<0.0001). So it was possible to say that the group serosal patch supports a 55.8% pressure more than the conventional group in samples of canine cadavers.