Saubere intermittierende Selbstkatheterisierung (SIK): Ein Schritt-für-Schritt-Patientenleitfaden

Zuletzt aktualisiert: 10. Juli 2026

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If your doctor has recommended clean intermittent catheterization — often shortened to CIC — it’s completely natural to feel nervous at first. The idea of passing a thin tube to empty your own bladder can sound daunting. But here’s the reassuring truth I share with every patient: it’s a safe, straightforward skill that most people learn surprisingly quickly, and it gives you back control and independence. This guide walks you through what it is, why it’s recommended, and exactly how to do it, step by step.

What Is Clean Intermittent Catheterization?

Clean intermittent catheterization is simply a way to empty your bladder by gently inserting a thin, flexible tube (a catheter) through the urethra — the opening where urine normally comes out — into the bladder. You do this a few times a day, usually around four to six times, on a schedule similar to normal urination. Once the bladder is empty, the catheter is removed. That’s it: no permanent tube, no bag strapped to your leg — just a quick, routine emptying whenever it’s time.

Why Is CIC Recommended?

CIC offers several genuine advantages. It protects your kidneys by keeping the bladder from becoming dangerously overfull, and it lowers the risk of urinary tract infections compared with having a permanent (indwelling) catheter left in place. Perhaps most importantly, it gives you independence — you can manage your own bladder emptying at home, at work, or while traveling — and it mimics natural bladder function, letting the bladder fill and empty on a regular cycle just like normal urination.

Why “Clean” Instead of “Sterile”?

A common question is why your healthcare team recommends a “clean” technique rather than a fully “sterile” one. The answer is reassuring on several fronts. Research has shown no proven difference in infection rates between the two, so clean technique doesn’t put you at higher risk. It’s also far simpler and faster — no sterile gloves, drapes, or antiseptic solutions, just thorough handwashing and a clean catheter — which makes it realistic to do several times a day. Because it needs fewer supplies, you can do it almost anywhere: a bathroom at home, at work, in a restaurant, or while traveling. It’s also more affordable, and — crucially — because it’s simpler, people are far more likely to stick with their schedule, which is the single most important factor in preventing complications.

What You Will Need

• A clean, single-use catheter (your provider will prescribe the correct size and type)
• Water-soluble lubricant (unless your catheter is pre-lubricated or hydrophilic-coated)
• Soap and water for handwashing
• A clean container or toilet to drain urine into
• Optional: a small mirror (helpful for women while learning) and moist wipes or a washcloth for cleansing

Step-by-Step Instructions

Before You Begin

1. Gather your supplies — have your catheter, lubricant, and a container or toilet ready.
2. Wash your hands thoroughly with soap and water for at least 20 seconds. If soap and water aren’t available, use an alcohol-based hand sanitizer.
3. Get into a comfortable position — sit on the toilet, stand with one foot raised on a stool, or lie down, whichever works best for you.

Preparing the Area

Gently clean the genital area with soap and water or a moist wipe. For women: spread the labia (the folds of skin) with your non-dominant hand and clean from front to back to avoid bringing bacteria toward the urethra — a mirror can help you locate the opening. For men: if uncircumcised, gently retract the foreskin, then clean the tip of the penis with a front-to-back motion.

Inserting the Catheter

1. Open the catheter package carefully, touching only the funnel end you’ll hold — not the insertion tip.
2. Apply lubricant generously to the insertion tip (skip this if your catheter is pre-lubricated or hydrophilic-coated — just activate it with water as directed on the package).
3. Gently insert the catheter into the urethral opening. For women: insert slowly, about 2–3 inches (5–7 cm), until urine begins to flow. For men: hold the penis at roughly a 60–90 degree angle from the body and insert slowly, about 6–8 inches (15–20 cm), until urine flows. If you feel resistance, take a slow deep breath, relax, and use gentle steady pressure — never force the catheter.

Draining the Bladder

Let the urine drain completely into the toilet or container — you can gently press on your lower abdomen to help empty the bladder fully. Once the flow stops, slowly withdraw the catheter, pausing if more urine begins to flow and waiting until it stops again before continuing to remove it.

After You Finish

Remove the catheter completely and dispose of single-use catheters in the trash — never flush them down the toilet. Wash your hands again with soap and water, and note the amount of urine drained if your provider has asked you to keep a record.

Tips for Success

• Stick to your schedule. Catheterize at regular intervals (usually every 4–6 hours) as recommended — don’t let your bladder overfill.
• Drink fluids normally unless told otherwise — staying hydrated keeps your urinary tract healthy.
• Don’t panic at a little blood the first few times. Mild irritation is common when starting out and usually settles quickly — but contact your provider if bleeding persists.
• Store supplies in a clean, dry place, and carry a catheterization kit when you go out so you can stay on schedule.

When to Call Your Doctor

Reach out to your healthcare provider if you experience any of the following: fever, chills, or feeling unwell; cloudy, foul-smelling, or bloody urine that doesn’t improve; pain or burning that worsens with catheterization; difficulty inserting the catheter or an inability to drain urine; or persistent leaking of urine between catheterizations. These can be signs of an infection or another issue that’s worth checking promptly.

Most importantly, remember that learning CIC is a process — it gets easier and more routine with practice, and the independence it offers is well worth the initial learning curve. If you have questions or want hands-on guidance, Dr. Soarawee Weerasopone offers specialist consultations at Bangkok Hospital Headquarters. Beratungstermin buchen. (If your catheterization was recommended because your bladder isn’t emptying fully, you may also find my article on residual urine and why the bladder doesn’t empty helpful.)

Reference: Prieto JA, Murphy CL, Stewart F, Fader M. Intermittent catheter techniques, strategies and designs for managing long-term bladder conditions. Cochrane Database of Systematic Reviews. 2021;10:CD006008.

Häufig gestellte Fragen (FAQ)

Was ist saubere intermittierende Katheterisierung (SIK)?

Die intermittierende Selbstkatheterisierung (ISK) ist eine Methode zur Entleerung der Blase, bei der mehrmals täglich ein dünner, flexibler Schlauch (Katheter) vorsichtig durch die Harnröhre in die Blase eingeführt und nach vollständiger Entleerung der Blase wieder entfernt wird. Sie wird angewendet, wenn die Blase sich nicht vollständig selbst entleeren kann und ahmt den natürlichen Füll- und Entleerungszyklus des normalen Wasserlassens nach, ohne dass ein permanenter Katheter erforderlich ist.

Why use a “clean” technique instead of a “sterile” one?

Forschungen haben gezeigt, dass es keinen Unterschied bei den Infektionsraten zwischen der Anwendung von sauberer und steriler Technik gibt, daher ist die saubere Technik genauso sicher. Sie ist auch einfacher, schneller und kostengünstiger – sie erfordert nur gründliches Händewaschen und einen sauberen Katheter anstelle von sterilen Handschuhen, Abdecktüchern und Antiseptika –, was bedeutet, dass sie fast überall angewendet werden kann und leichter einzuhalten ist. Eine konsequente Einhaltung ist der wichtigste Faktor zur Verhinderung von Komplikationen.

Wie oft sollte ich katheterisieren?

Die meisten Menschen katheterisieren etwa vier- bis sechsmal täglich, also ungefähr alle vier bis sechs Stunden, nach einem Zeitplan, der dem normalen Wasserlassen ähnelt. Die genaue Häufigkeit wird von Ihrem Arzt oder Ihrer Ärztin entsprechend Ihren Bedürfnissen festgelegt. Das übergeordnete Prinzip ist, eine Überfüllung der Blase zu vermeiden, was Ihre Nieren schützt und das Infektionsrisiko senkt.

Es ist normal, wenn bei Beginn des CIC ein wenig Blut auftritt.

A small amount of blood or mild irritation is common in the first few catheterizations as your body adjusts, and it usually resolves quickly. However, you should contact your healthcare provider if bleeding persists, or if you develop fever, worsening pain or burning, or cloudy, foul-smelling urine that doesn’t improve, as these can signal an infection.

Was soll ich tun, wenn ich beim Einführen des Katheters Widerstand spüre?

Üben Sie niemals Druck auf den Katheter aus. Wenn Sie Widerstand spüren, halten Sie inne, atmen Sie langsam und tief ein und entspannen Sie sich – Muskelverspannungen sind eine häufige Ursache. Versuchen Sie es dann erneut mit sanftem, gleichmäßigem Druck. Bei Männern hilft es, den Penis im richtigen Winkel zu halten, damit der Katheter leichter eingeführt werden kann. Wenn Sie ihn immer noch nicht einführen können oder keinen Urin ablassen können, wenden Sie sich an Ihren Arzt.

Haftungsausschluss: This content is written and reviewed by Dr. Soarawee Weerasopone, a board-certified urologist at Bangkok Hospital Headquarters. It is intended for educational purposes only and does not constitute medical advice. Always follow the specific instructions given by your own healthcare provider, and consult a qualified professional before starting or changing any medical routine.