Risk Of Postoperative Urinary Tract Infection Research Articles

Risk factors for Infectious Complications of Ureteroscopy after Obstructive Acute Pyelonephritis.

To identify risk factors for infectious complication of ureteroscopy after obstructive acute pyelonephritis (OAPN). This single-center, retrospective cohort study (#20200002, retrospectively registered in February 1st, 2020) included patients who underwent emergency drainage for OAPN and subsequently underwent ureteroscopic stone removal between January 2006 and December 2020. Multivariable analysis was conducted using demographic and stone-related factors to determine those that could predict postoperative febrile urinary tract infection (UTI). Overall, 432 patients underwent ureteroscopy after OAPN. The stone-free rate was 84.3%, whereas the overall and major complication rates were 17.6% and 3.2%, respectively. A total of 70 (16.2%) patient developed febrile UTI, among whom 34 (7.9%) and 11 (2.5%) developed sepsis and severe sepsis, respectively. Multivariable analysis identified diabetes mellitus [odds ratio (OR) 1.98, 95% confidence interval (CI) 1.05-3.74], duration from drainage to surgery >1 month (OR 2.28, 95% CI 1.20-4.74), and simultaneous retrograde intrarenal surgery (OR 2.96, 95% CI 1.35-6.48) as significant risk factors for UTI. After dividing patients into low- (0), intermediate- (1), and high- (2-3) risk groups according to the number of factors they had, the risk of postoperative UTI was 6.3%, 14.5%, and 27.7%, respectively (p for trend <0.001). Patients who underwent ureteroscopy after OAPN were at risk for postoperative UTI, despite its efficacy. Simultaneous retrograde intrarenal surgery should be carefully planned, especially for patients with diabetes mellitus or extended surgery wait times.

Early versus delayed urinary catheter removal after hysterectomy: A systematic review and meta-analysis

ObjectivesIn bladder drainage, an essential part of post-hysterectomy care, the optimal timing for removing the urinary catheter is unclear. Our objective was to evaluate the risks and benefits of early (<6 h) vs delayed (>6 h) catheter removal post-hysterectomy. Study designA systematic review searching MEDLINE, EMBASE and Cochrane CENTRAL from inception till May 2019 for randomised trials of women undergoing hysterectomy. We reported on urinary retention, positive urine culture, urinary tract infection (UTI) (defined by symptoms and/or antibiotic use), post-operative pyrexia, time to ambulation, and length of hospital stay. We assessed risk of bias in included trials and used a random-effect model to generate risk ratios (RR) for dichotomous outcomes and weighted mean differences (WMD) for continuous outcomes, with 95 % confidence intervals (CI). ResultsOf 1020 potentially relevant citations, we included 10 randomised trials (1120 women). Four trials had low risk of bias for randomisation and allocation concealment while five had low risk for outcome assessment and selective reporting. Compared to delayed removal, women in the early catheter removal group had a higher risk of urinary retention and needing re-catheterisation (10 RCTs, RR 3.61, 95 %CI 1.21–9.21, I2 = 56 %). There was some reduction in the risk of post-operative UTI (6 RCTs, RR 0.42, 95 %CI 0.18 to 0.96, I2 = 0 %), but we did not find a significant difference in post-operative pyrexia (6 RCTs, RR 0.73, 95 %CI 0.43–1.24, I2 = 18 %) or positive urine cultures (6 RCTs, RR of 0.56, 95 %CI 0.27–1.12, I2 = 55 %). There was no significant difference in the average time to ambulation (3RCTs, WMD −4.6, 95 %CI −9.16 to −0.18, I2 = 98 %) and length of hospital stay (3RCTs, WMD −1.05, 95 %CI −2.42 to 0.31, I2 = 98 %). Our meta-regression on the provision of prophylactic antibiotics did not show a significant effect on the reported outcomes. Our analysis was limited by our inability to adjust for potential effect modifiers such as the surgical route. ConclusionsEarly removal of the urinary catheter <6 h post-hysterectomy seems to increase the risk of urinary retention and needing re-catheterisation, but may reduce post-operative UTI.

Impact of per-operative antibiotics on the urinary tract infection rate following mid-urethral sling surgery for urinary incontinence: a randomized controlled trial.

The objective was to compare the effect of antibiotics versus no antibiotics prophylaxis per-operatively on the frequency of urinary tract infection (UTI) following mid-urethral sling application to treat stress or mixed urinary incontinence. This study was designed as a multicenter prospective randomized trial. Women were included from eight centers in three countries. Women were aged under 60years and had objectively verified stress urinary incontinence. Women with mixed urinary incontinence were also included. Randomization was held in blocks for operation with either antibiotics or no antibiotics. UTI was defined in accordance with the Centers for Disease Control (CDC) criteria for symptomatic UTI. Women were followed up at 3, 12, and 36 months. This was part of a trial comparing subjective cure rate in relation to application of Ajust® (single-incision mid-urethral slings) versus standard mid-urethral slings. The main outcome was to evaluate if per-operative antibiotics had any impact on UTI following sling surgery. In total, 305 women were randomized (158 [52%] to antibiotics and 147 [48%] to no antibiotics). Demographic data disclosed no differences between the two groups. The trial did not show any difference between the two groups regarding the frequency of postoperative UTI. Logistic regression analysis disclosed only residual urine volume at 3 months' follow-up as a significant risk factor for UTIs. Per-operative antibiotics had no influence on the frequency of mesh erosions or any other complication. Our trial does not suggest any beneficial effect of per-operative antibiotics on the risk of post-operative UTIs.

Risk of postoperative urinary tract infections following midurethral sling operations in women undergoing hysterectomy.

Urinary tract infections (UTIs) are the most common complication following hysterectomy and mid-urethral sling procedures (MUS). As a MUS is often placed at the time of hysterectomy, we sought to determine if the addition of an MUS procedure significantly increases the risk of UTI in the first 30 days following hysterectomy. This retrospective cohort study utilizes the National Surgical Quality Improvement Program (NSQIP) data bank for the years 2006-2012. The database collects data on all enrolled patients preoperatively and in the first 30 days postoperatively. The database was searched using procedural codes for various types of hysterectomies and MUS procedures. We assessed the incidence of postoperative UTIs following hysterectomy (HYST) only, MUS only, and hysterectomy combined with MUS (HYST + MUS). Adjusted logistic regression analyses were performed to evaluate the effects of individual risk factors and models of interaction. The NSQIP cohort included 3,757 in the HYST + MUS group, 9,851 in the MUS-only group, and 57,398 in the HYST-only group. The rates of postoperative UTI, which was the most common postoperative morbidity, were 5.3, 3.4, and 2.5 % respectively. Multivariate logistic regression analysis showed a persistent significant increase in rates of UTI (p < 0.001) between the MUS + HYST group and the HYST-only group. This significance was not maintained between the MUS-only group and the MUS + HYST group. Data from the NSQIP databank indicate that performing an MUS in combination with hysterectomy nearly doubles the risk of postoperative UTI over a hysterectomy alone.

Comparison of the risk of postoperative infection between transurethral vaporesection and transurethral resection of the prostate

We observed in our department at 3 months two episodes of bacteremia postoperatively to photoselective vaporization of the prostate (PVP). We decided to compare the frequency of postoperative urinary tract infections (POUTIs) in patients with preoperative bacterial colonization of urine between PVP and transurethral resection of the prostate (TURP). From January 2010 to December 2011, we studied patients who underwent PVP or TURP for benign prostatic obstruction in our department. Preoperative urine culture (UC) was carried out for all patients and we included those with preoperative bacterial colonization of the urinary tract. Patients were treated preoperatively with an appropriate antibiotic treatment and/or inductive prophylactic antibiotics. Patients were diagnosed with POUTI if they had clinical signs of infections (e.g., fever) and a positive UC during the month after surgery. Patients were treated by PVP in 49 cases and TURP in 62 cases. A preoperative indwelling urinary catheter was inserted in 80% of the patients. During the postoperative period, eight episodes of fever were identified in the PVP group (16%), five (8%) in the TURP group (P = 0.18). We then studied the subgroup of patients with multiple bacteria strains present in the preoperative UC and identified significant differences. The risk of POUTI was significantly higher in patients treated by PVP than in those treated by TURP (P = 0.018). We found significant differences between subgroups of patients with positive preoperative cultures (containing various bacterial strains). The risk of POUTI was significantly higher in patients treated by PVP.