science

Ureteric balloon catheter

Ureteric balloon catheter is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Ureteric balloon catheter rather than just read about it. In short: A ureteric balloon catheter is a balloon catheter intended for treating strictures of the ureter. In fact it is a double J stent on which a balloon is mounted.

Key takeaways

Ureteric balloon catheter belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Ureteric balloon catheter to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Ureteric balloon catheter from memory before moving on to harder problems.

Reference excerpt

A ureteric balloon catheter is a balloon catheter intended for treating strictures of the ureter. In fact it is a double J stent on which a balloon is mounted. It is connected to a delivery device (pusher) to introduce it from the bladder into the ureter. The system comprises a non-return valve device, and a pusher with a stylet and two ports. The side port is for injecting contrast agent to inflate the balloon, while the straight port is for the guidewire. The catheter has a relatively large-diameter central lumen and a shaft of 2 mm (6 Fr.). The balloon is in two sections: a long narrow section or shaft and a larger cranial bulb. The larger cranial bulb prevents distal migration, while the longer narrow section maintains the increased diameter of a predilated stricture in the ureter section.

Stent placement and removal A guide wire has to be placed in the ureter. After dilatation of the ureteric stricture with a high pressure dilatation balloon the guidewire remains in place to bring in the ureteric balloon catheter. The balloon is inflated by an injection of contrast medium via side port of the pusher and remains in situ while the expanded urothelium heals. The stylet is used to detach the balloon catheter from the pusher. During the healing process urine drains through the wide central lumen while the balloon remains inflated. The ureteric balloon catheter may be used in conjunction with a double J stent for additional drainage. To remove the catheter after several weeks the balloon is deflated by snipping the distal end of the catheter. The catheter can then safely be pulled out.

Indications The ureteric balloon catheter is intended to cure two major types of diseases:

Ureteropelvic junction obstruction (also called UPJ obstruction or Pelvic-ureteric junction obstruction PUJO) caused by intrinsic wall factors as fibrosis and / or hypertrophic wall problems.

and Brickers bladder (also called Ileal conduit) problems. Up to 10% of patients who undergo ileal conduit urinary diversion may go on to develop ureteroileal anastomotic stenosis. This can lead to obstructive symptoms as side pain, infection and finally deterioration in renal function which can be relieved by the treatment with this balloon catheter. An intervention according to this Overtoom procedure is significantly less invasive than the alternative treatments. The balloon is not intended to be used in case of obstructions by stones or malignancies.

References

Further reading Mardis HK, Kroeger RM (1988). "Ureteral stents- Materials;". Endourology Update: Urological Clinics of North America. 15 (3): 471–479. doi:10.1016/S0094-0143(21)01593-7. PMID 3407039. Saltzman B (1988). "Ureteral stents – indications, variations and complications". Endourology Update: Urological Clinics of North America. 15 (3): 481–491. doi:10.1016/S0094-0143(21)01594-9. PMID 3043868. Macaluso JN (April 1993). "External urinary diversion: pathologic circumstances and available technology". J. Endourol. 7 (2): 131–6. doi:10.1089/end.1993.7.131. PMID 8518825. Having a Ureteric Stent - What to Expect and How to Manage. Authors: Mr. H. B. Joshi (Specialist Registrar in Urology, Cambridge. Formerly Research Registrar at Bristol Urological Institute), N. Newns (Staff Nurse), Mr. F. X. Keeley Jr. (Consultant Urologist), Mr. A. G. Timoney (Consultant Urologist), Bristol Urological Institute, Southmead Hospital, Westbury-on-trym, Bristol BS10 5NB More information on ureteric balloon catheters.

Illustrations

Worked examples

Example 1 — a first encounter with Ureteric balloon catheter

Start with the simplest possible case. Write down what Ureteric balloon catheter claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Ureteric balloon catheter before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Ureteric balloon catheter ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Ureteric balloon catheter

In research: Ureteric balloon catheter appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Ureteric balloon catheter in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Ureteric balloon catheter is common in secondary-school and first-year university syllabi. It links to neighbouring topics Catheters, Urologic procedures, Urologic surgery, so understanding it makes those chapters shorter.
In everyday life: Look for Ureteric balloon catheter outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Ureteric balloon catheter in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Ureteric balloon catheter means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Ureteric balloon catheter out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ureteric balloon catheter in simple terms?

A ureteric balloon catheter is a balloon catheter intended for treating strictures of the ureter. In fact it is a double J stent on which a balloon is mounted.

Why does Ureteric balloon catheter matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Ureteric balloon catheter?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Ureteric balloon catheter.