P117 Surgical management of Ureteropelvic Junction Obstruction (UPJO) in Neonates amid COVID-19 pandemic; Review of Literature and a Cohort Study in Iran

Introduction The current study presents a systematic review of literature on surgical management of ureteropelvic junction obstruction (UPJO) alongside an ongoing cohort study of neonates presenting with high grades of hydronephrosis due to UPJO requiring urgent treatment in a developing country amid the COVID-19 pandemic. The aim of this study is to investigate the efficacy and cost effectiveness of laparoscopic-assisted pyeloplasty. Methods Patients’ demographics, clinical presentations and treatment outcomes are recorded. The cohort is classified into 3 groups based on type of surgical treatment offered including open, laparoscopic and laparoscopic-assisted pyeloplasty. All patients admitted with grade 3-4 hydronephrosis due to UPJO are included. Patients with UPJO as part of a complex multisystemic syndrome are excluded. Literature review was conducted from 2000/1/1 to 2020/1/1 to include all original research papers on surgical management of UPJO. The age group was limited to neonates (under 1 year-old). Results 32 articles were included in the review. 20 papers (62.5%) recommended open pyeloplasty, 10 papers (31.3%) recommended laparoscopic pyeloplasty and 2 papers (6.25%) recommended laparoscopic-assisted pyeloplasty. The cohort study is currently recruiting patients treated by the 3 surgical approaches. Conclusion The majority of studies are focusing on open pyeloplasty. However, as more surgeons are going through the learning curve of laparoscopic pyeloplasty, the trend is towards more laparoscopic management in the future. It is important to discover the advantages of laparoscopic-assisted approach as a new technique to improve the outcome and shorten the hospital stay amid the COVID-19 pandemic

Gentamicin Induced Nephrotoxicity: The Role of Sex Hormones in Gonadectomized Male and Female Rats

Background. Gentamicin (GM) induced nephrotoxicity may be sex hormones related. The effects of sex hormones on GM induced nephrotoxicity in gonadectomized rats were investigated. Methods. Ovariectomized rats received 0.25, 0.5, or 1 mg/kg/week of estradiol (ES) alone or accompanied with 10 mg/kg/week of progesterone (Pro) for two weeks followed by GM (100 mg/kg/day) for 9 days. Castrated rats were also treated with 10, 50, or 100 mg/kg/week of testosterone (TS) for two weeks and then received GM. In addition, a single castrated group received 0.25 mg/kg/week of ES plus GM. Results. GM increased the serum levels of blood urea nitrogen (BUN) and creatinine (Cr) and kidney tissue damage score (KTDS) (P<0.05). TS had no effect on the serum levels of BUN and Cr and KTDS, while low dose of ES intensified these parameters in male (P<0.05). ES (0.5 mg/kg) without Pro ameliorated KTDS in female (P<0.05) while ES (1 mg/kg) with or without Pro exacerbated the BUN values and Cr values, KTDS, and body weight loss (P<0.05). Conclusion. ES (0.5 mg/kg) without Pro ameliorated kidney damage induced by GM in female while neither TS nor ES had beneficial effect on nephrotoxicity induced by GM in male, although ES aggravated it