Most ureteral stents come out in days to weeks, while longer-term ones are usually changed every 3 to 6 months.
If you’re wondering “How Long Can A Kidney Stent Stay In?”, the safest answer is: only as long as the plan says. For most people, a kidney stent means the tube that keeps urine draining from the kidney to the bladder. Many are short-term after a stone procedure. Some stay in longer for blockage, scarring, or pressure on the ureter. What matters is not the calendar alone. It’s whether the stent is still needed, what type it is, and when your urologist planned removal or exchange.
What A Kidney Stent Usually Means
In everyday talk, people say “kidney stent” for the tube used to drain urine from the kidney into the bladder. Doctors usually call that a ureteral stent. It sits inside the ureter, with one curled end in the kidney and the other in the bladder. Its job is simple: keep urine moving when swelling, a stone, scar tissue, or a mass is squeezing the ureter.
That is why the same device can have two different timelines. After a routine stone procedure, the stent may only be there for a few days or a few weeks. If the ureter keeps narrowing or a blockage keeps coming back, the stent may need planned exchanges over months.
Kidney Stent Timing By Situation
The usual pattern is short-term first. Cleveland Clinic’s ureteral stent overview says many people have a stent for a few days to a few weeks. North Bristol NHS guidance says stents left in longer are usually replaced at 3 to 6 months.
That does not mean every stent is fine for the same length of time. A string stent placed after stone work may come out within days. A standard plastic stent meant to stay longer is often exchanged on a schedule. Some stone-related stents are kept on a tighter window, since mineral build-up can make removal harder if the stent sits too long.
So the plain-English answer is this: most short-term stents do not stay in for months, and most longer-term plastic stents should not stay in untouched past the exchange date your urologist gave you.
What Changes The Deadline
A stent is not just a tube. Its material, size, whether it has a string, and the reason it was placed all shift the deadline. A stent used after ureteroscopy has a different job from one used to keep a narrowed ureter open during a longer stretch of treatment.
- The reason for the stent
- Your stone history and how fast mineral build-up forms
- Any infection, fever, or cloudy urine
- Whether the ureter is still blocked
- The type of stent your surgeon used
- Whether removal is planned by string, office cystoscopy, or another procedure
| Situation | Usual Stay | What This Often Means |
|---|---|---|
| Short-term stent with a string | Days to about 2 weeks | Often used after stone work when quick removal is planned. |
| Short-term stent after a routine stone procedure | A few days to a few weeks | Common when the ureter needs time to settle after treatment. |
| Standard plastic stent for ongoing drainage | Up to about 3 to 6 months before exchange | Used when the blockage or narrowing is still there. |
| Stone-related stent that must stay longer | Often kept on a shorter window | Many units try to remove or change these by about 3 months. |
| Stent for a narrowed ureter or outside pressure | Months, with planned exchanges | The stent may be part of a longer plan, not a one-time fix. |
| Special long-term stent choice | Longer than standard plastic in selected cases | Your urologist sets this date case by case. |
| Missed follow-up visit | Not a safe “wait and see” situation | Call the urology office as soon as you know the date was missed. |
| Stent left in far past plan | Risk rises with time | Mineral crust, blockage, infection, and harder removal all become more likely. |
Signs A Stent Has Stayed Too Long
A lot of stent symptoms are annoying but still expected. Mild blood in the urine, bladder pressure, frequent urination, and aching in the kidney when you pee are all common. What changes the picture is when those symptoms get worse, stop you from coping, or show up with fever.
Watch for fever, chills, side pain that keeps building, vomiting, cloudy or bad-smelling urine, heavy bleeding, clots, or trouble passing urine. MedlinePlus aftercare advice lists those as reasons to contact your care team. If you cannot reach them and you feel acutely unwell, urgent care is the safer move.
Symptoms That Can Happen Even With A Fresh Stent
These do not always mean the stent has overstayed its date:
- Blood in the urine that comes and goes
- A pulling or aching feeling when you pee
- More trips to the bathroom
- Bladder irritation or pressure
- Mild flank pain after activity
Those symptoms still deserve a call if they suddenly ramp up, keep you from drinking fluids, or do not match what your team told you to expect.
Why One Person’s Maximum Time Is Different From Another’s
There is no single magic number that fits every stent. A patient with a small stone that has already been treated may only need a short healing window. A patient with a tight ureter, a pelvic mass, or repeated blockage may need a stent changed on a rolling schedule for much longer.
The material matters too. Standard plastic stents are the ones most people get, and they are the ones usually changed every few months when longer drainage is still needed. Some selected patients get longer-term stent choices, but that is a custom plan, not a reason to ignore a missed removal date.
Your own history matters as well. People who form stones, get urine infections, or have heavy mineral build-up can run into trouble sooner. That is one reason two people can have the same stent placed on the same day and still get different removal dates.
How Removal Or Exchange Usually Happens
If the stent is only meant to stay in briefly, it may have a string. In that setup, removal can be done by gentle traction when your team tells you it is time. If the stent is meant to stay longer, the string is usually not left hanging outside. Removal or exchange is then done with a small camera through the urethra and bladder.
That sounds worse than it usually feels. Many removals are quick office procedures. What causes more trouble is not the removal itself. It is the stent that stayed in far past plan and picked up crust, stones, or blockage along the way.
So if your discharge sheet gave a date, treat that date like part of the procedure, not an optional follow-up. The stent is only half the job. Timely removal or exchange is the other half.
| Symptom Or Situation | Often Seen With A Stent | Call The Team Soon |
|---|---|---|
| Light blood in urine | Yes, this can come and go | If bleeding gets heavy or you pass clots |
| Bladder pressure or urgency | Yes | If you cannot cope or cannot sleep, pee, or drink |
| Ache in the side when peeing | Can happen | If pain keeps building or does not ease |
| Cloudy or foul-smelling urine | No | Yes, this can point to infection |
| Fever or chills | No | Yes, same day |
| Missed removal date | No | Yes, call as soon as you notice |
How To Avoid A Forgotten Stent
Most stent problems are not about the first week. They start when the follow-up plan gets fuzzy. People feel better, the stone pain is gone, and the stent slips off the radar. That is how a short-term device turns into a hard-removal problem.
- Leave the hospital with the removal or exchange date written down
- Set two reminders on your phone, not one
- Keep a photo of the discharge sheet
- Ask whether you have a string stent or a stent with no string
- Call the office if the due date is close and no appointment has been booked
- Do not assume the stent will pass on its own
If you travel or move while the stent is still in, arrange follow-up right away in the new location. The stent does not care that your plans changed.
What To Do With Your Removal Date
For most people, the real answer to this topic is not a big number of weeks or months. It is this: a kidney stent should stay in only until the job is done, then it should come out or be changed on schedule. Short-term stents are often measured in days or weeks. Longer-term plastic stents are often measured in months, with exchange at 3 to 6 months.
If you do not know your date, ask today. If you missed it, call today. That step can spare you infection, a blocked stent, stone build-up, and a much tougher removal later on.
References & Sources
- Cleveland Clinic.“Ureteral Stent: Purpose, Procedure, Results & Removal.”Shows that many ureteral stents stay in for a few days to a few weeks, while longer-term use often means planned exchange every 3 to 6 months.
- North Bristol NHS Trust.“Nephrostomy and ureteric stent insertion.”Shows that ureteric stents can remain in place for 3 to 6 months and are usually replaced if they need to stay in longer.
- MedlinePlus.“Percutaneous urinary procedures – discharge.”Lists red-flag symptoms such as worsening flank pain, fever, chills, vomiting, and cloudy or foul-smelling urine that need medical contact.