Lojanapiwat B
Division of Urology, Department of Surgery, Chiang Mai University, Chiang Mai 50200, Thailand.
World J Urol. 2006 Dec;24(6):681-3. doi: 10.1007/s00345-006-0135-6. Epub 2006 Nov 9.
To demonstrate the infection rates, colonization rates following the internal ureteral stent placement; the correlation of indwelling time with the infection, bacterial colonization and the value of urine culture to identify colonizing bacteria One hundred and forty-eight stents of 146 patients were evaluated for the bacteriuria and colonization after internal ureteral placement average 8.6 weeks according to the indication. All patients were ambulatory and were examined in an outpatient clinic. Urine culture and 1 cm of proximal and distal ends was taken for culture for bacterial evaluation. The rate of colonization is 33, 50 and 54% when indwelling time is less than 4 weeks, 4-6 weeks and more than 6 weeks, respectively. Urine culture can detect colonization in 69%. Colonization was not found if the indwelling time was less than 2 weeks. Escherichia coli, Enterobacter and Pseudomonas spp. were the most common colonized organisms. Colonization is common if the indwelling time is more than 2 weeks, urine culture can detect colonization in about two to three of the patients. Even if the culture is negative, prophylactic antibiotic that cover gram-negative and gram-positive organisms should be administrated when the patients require further procedures.
为了证明输尿管内支架置入后的感染率、定植率；留置时间与感染、细菌定植的相关性以及尿培养在鉴定定植细菌方面的价值，根据适应证，对146例患者的148枚支架在输尿管内放置平均8.6周后进行了菌尿和定植情况评估。所有患者均为门诊患者，在门诊接受检查。采集尿培养样本以及支架近端和远端各1 cm进行细菌培养评估。当留置时间小于4周、4 - 6周和大于6周时，定植率分别为33%、50%和54%。尿培养能检测出69%的定植情况。如果留置时间小于2周，则未发现定植。大肠埃希菌、肠杆菌和假单胞菌属是最常见的定植菌。如果留置时间超过2周，定植情况很常见，尿培养大约能在三分之二的患者中检测出定植。即使培养结果为阴性，当患者需要进一步治疗时，也应给予覆盖革兰氏阴性菌和革兰氏阳性菌的预防性抗生素。
