What is a ureteral stent (Double-J stent)?

A ureteral stent, commonly called a Double-J (DJ) stent, is a small flexible tube about 25 cm long with a pigtail coil at each end shaped like the letter J. It was invented in 1976 and is placed inside the ureter to ensure urine flows freely from the kidney to the bladder whenever the ureter is obstructed or injured.

When is a ureteral stent needed?

A ureteral stent is indicated for severe kidney infection with blocked urine flow, severe kidney or ureteral injury from trauma, intolerable acute kidney stone pain, pre-stenting before ESWL (shockwave lithotripsy) for large stones, and ureteral swelling after endoscopic laser stone surgery.

How long can a ureteral stent stay in the body?

A ureteral stent is typically designed to remain in the urinary system for up to 3 months. The longer it stays, the higher the risk of encrustation, where calcium from urine builds up on the stent and can cause it to become like a stone itself. Early removal is always preferred.

What are the side effects of having a ureteral stent?

Up to 80% of patients experience stent-related discomfort. Common symptoms include incomplete bladder emptying (76%), urinary urgency (57–60%), urinary frequency (50–60%), irritation during urination (40%), suprapubic discomfort (30%), bloody urine (25%), and flank discomfort (19–32%).

Will the discomfort from a ureteral stent go away?

Yes. All stent-related symptoms, including urinary frequency, urgency, pain, and bloody urine, will disappear completely once the ureteral stent is removed. These symptoms are temporary and caused by the body's natural response to the foreign object.

Why does a ureteral stent cause urinary symptoms?

The body recognizes the stent as a foreign object and naturally tries to expel it through ureteral contractions. Because the double pigtail design prevents the stent from being passed out, these repeated contractions cause irritation and discomfort in the bladder and urinary tract.

输尿管支架：利弊

Last updated: 4 月 8, 2026

Soarawee Weerasopone，泌尿科医生

曼谷医院总部，曼谷

Samitivej Sriracha 医院, 春武里府

LINE联络

输尿管支架是内窥镜泌尿外科手术中非常有用的手术器械。我的病人总是问这个问题“那是什么？”？这样做有危险吗？保留输尿管支架期间会引起什么副作用？本主题将为您编码所有问题。

DJ支架是内部设计的用于固定输尿管的泌尿科器械。参考： http://www.alibaba.com

输尿管支架或医疗专业人员中交流友善的“双J支架”是两端带有双尾纤线圈的小管（Pigtail的形状类似于J字母，这就是我们称之为Double-J支架的原因）。自1976年发明以来，它在泌尿科治疗中带来了巨大的好处。由于其形状模仿输尿管解剖结构，直径25厘米长，直径比输尿管腔相对较小，因此设计用于在输尿管功能受损时固定输尿管解剖结构。当输尿管支架就位时，我们绝对有信心尿液会从肾脏自由流到膀胱而不会产生任何疼痛。

DJ支架最常见的适应症之一是内镜下结石手术。

输尿管支架事件的适应症：

严重肾脏感染伴尿运输障碍
事故造成的严重肾脏伤害
意外引起的输尿管损伤
难以忍受的急性石痛
大肾结石体外冲击波碎石术（ESWL）之前的预支架
内镜激光手术后输尿管结石引起的输尿管肿胀

输尿管支架的使用寿命–支架通常设计用于泌尿系统3个月。系统中的时间越短，保护性支架的结石就越少（尿液中存在钙离子，总是试图使输尿管支架成为泌尿系统的结石）。

与支架相关的症状–既然一切都有利弊，我们就无法避免因输尿管支架进入体内而产生不适症状。我们的身体非常聪明，他们可以通知该异物，并且他们总是试图通过自然输尿管收缩将其清除。不幸的是，由于猪尾系统会阻止支架自由移动并散发出去，因此他们无法承受自己试图这样做的所有突然费用，这就是为什么会遇到异常的不适和刺激症状的原因，大约为80%。有患者报告支架不适。因此，对于大多数患者而言，经历支架不适很简单。以下是与支架相关的不适症状和面朝上的机会。

尿频– 50至60%
尿急– 57至60%
小便刺激性– 40%
不完全排空– 76%
侧面不适– 19至32%
耻骨上不适– 30%
血尿– 25%

好消息是，一旦我们将其消除，所有与支架相关的症状都将消失。

好消息是，当我们移除输尿管支架时，所有与支架相关的症状都会消失。如果您对输尿管支架有任何疑问，可以与您值得信赖的泌尿科医师进行讨论，或者如果您发短信会很荣幸我。下篇再见！

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Medically written & reviewed by: Dr. Soarawee Weerasopone (Dr. Pom) — Board-Certified Urologist, Bangkok Hospital Headquarters. International Fellow: Baylor College of Medicine (USA) · Juntendo University (Japan) · Chang Gung Memorial Hospital (Taiwan).

Soarawee Weerasopone博士

Dr. Soarawee Weerasopone (Dr. Pom) is a board-certified urologist at Bangkok Hospital Headquarters, specializing in Men’s Health, Robotic Surgery (Da Vinci System), and Kidney Stone treatment. He has completed international fellowships at Baylor College of Medicine (USA), Juntendo University Hospital (Japan), and Chang Gung Memorial Hospital (Taiwan). All medical content on this site is written and reviewed by Dr. Soarawee based on his clinical experience and international training.