Catheter Risk: An Evidence-Based Patient Guide

Catheter risk depends on the type of catheter, how long it remains in place, the reason it is needed and a person’s overall health. Most catheters are used safely when they are necessary, inserted using sterile technique, monitored carefully and removed as soon as they are no longer needed.

Overview: what does catheter risk mean?

Catheter risk refers to possible complications from a thin, flexible tube placed in the body to drain fluid, deliver medicines, obtain measurements or provide access for treatment. The most common examples are urinary catheters, which drain urine from the bladder, and vascular catheters, which provide access to a vein or artery. Risks are real but are usually manageable when the device is clearly indicated and cared for correctly.

A catheter may be needed during surgery, severe illness, urinary retention, limited mobility, kidney or bladder problems, intravenous treatment or dialysis. The clinical team should choose the least invasive device that can meet the person’s needs and reconsider the need for it each day. Removing an unnecessary catheter is one of the most effective ways to lower avoidable complications.

Not every symptom while a catheter is in place means there is a complication. Mild awareness of the device or temporary discomfort after insertion can occur. However, new or worsening pain, fever, chills, leakage, blood, swelling or a change in drainage should be assessed by a healthcare professional.

How catheters work and who may need one

Urinary catheters may be inserted through the urethra into the bladder, placed through a small opening in the lower abdomen, or used intermittently to empty the bladder and then removed. An indwelling urinary catheter has a small balloon inside the bladder that helps keep it in position. Urine travels through tubing into a drainage bag.

Vascular catheters are inserted into a vein, sometimes an artery, to give fluids, blood products, nutrition or medication, or to collect blood samples and monitor circulation. The type selected depends on the treatment, expected duration and condition of the veins. Some are short-term peripheral IVs, while others are longer central venous devices.

Appropriate candidacy is based on expected benefit rather than convenience alone. A clinician considers the reason for catheterization, anticipated length of use, infection risk, bleeding risk, skin condition, ability to manage the device at home and available alternatives. For urinary symptoms or bladder-emptying problems, evaluation may include assessment for related urinary tract infection or other urologic causes where relevant.

What happens during catheter placement

Before placement, a clinician confirms the reason for the catheter, explains the procedure where possible and checks relevant medical history, allergies and medicines. The person is positioned comfortably and privacy is maintained. Hand hygiene and clean or sterile technique are used according to the device and setting.

For a urinary catheter, the genital area is cleaned and lubricated tubing is gently passed into the bladder. Once urine flows, a retention balloon may be filled with sterile water if an indwelling catheter is required. The tubing is secured to reduce pulling, and the drainage bag is placed below bladder level to allow gravity drainage.

For a vascular catheter, the skin is disinfected and the device is placed using sterile precautions. Some longer lines are inserted with ultrasound guidance and may need a dressing, imaging confirmation or additional checks before use. The team documents the type of device, insertion site and plan for monitoring and removal.

People should feel able to ask why the catheter is needed, how long it is likely to remain in place and what signs to report. These conversations support shared decision-making and safer care.

Catheter risks and factors that affect them

Catheter risks procedure-related can include discomfort, temporary bleeding, bruising, tissue irritation, accidental dislodgement, blockage, leakage and device malfunction. Urinary catheterization can irritate the urethra or bladder, while vascular access can occasionally cause bleeding, inflammation of a vein, infiltration of fluid into nearby tissue or injury at the insertion site.

Infection is an important concern. With urinary devices, bacteria can enter the urinary tract through or around the catheter. Catheter-associated urinary tract infection risk rises with longer duration of catheter use and may also be influenced by age, immune suppression, diabetes, serious illness, impaired bladder emptying and breaks in the drainage system. A positive urine test alone does not always mean treatment is needed, especially when there are no symptoms; a clinician should interpret results in context.

Vascular catheter complications can include local infection, bloodstream infection and, less commonly, clot formation. Individual catheter risk factors include prolonged device use, repeated manipulation, poor skin integrity, complex medical conditions, reduced immunity and the need for intensive treatment. The exact risks differ by catheter type and by the person’s health situation.

Many complications can be reduced through careful insertion, daily assessment, secure fixation, hand hygiene and timely removal. Patients should never assume that a catheter must remain in place simply because it was inserted earlier; the care team can reassess its ongoing need.

Evidence-based catheter care at home and in hospital

Catheter care evidence based practice focuses on preventing contamination and avoiding unnecessary handling. For urinary catheters, the drainage system should stay closed, tubing should not be kinked or trapped, and the collection bag should remain below the level of the bladder without touching the floor. The catheter should be secured so that it does not pull on the urethra or skin.

Hand hygiene is essential before and after touching the catheter, tubing, drainage bag or dressing. Routine gentle washing of the surrounding skin with soap and water is usually sufficient unless the clinical team gives different instructions. Antibiotics, antiseptic products or bladder irrigation should not be used routinely without a specific medical indication.

When emptying a urine bag, avoid letting the outlet touch the container or other surfaces. Note unexpected changes such as no drainage, persistent cloudy urine, strong new odor, visible blood, leakage or discomfort. Adequate fluid intake may be appropriate for some people, but those with heart, kidney or fluid-restriction plans should follow their individual clinician’s advice.

For vascular catheters, dressings and caps should be handled only as instructed, and the site should be kept clean and dry. A trained clinician should review redness, pain, drainage, a loose dressing or problems with infusion. Do not use a vascular catheter for non-prescribed purposes or attempt to flush it unless the care team has taught the person to do so.

Recovery, monitoring and catheter removal

Recovery after catheter placement varies by device and reason for use. After a short-term urinary catheter is removed, mild stinging on passing urine or a temporary sense of urgency may occur. These symptoms often improve within a short time, but persistent symptoms or inability to pass urine needs medical review.

After removal of a vascular catheter, light pressure is commonly applied to prevent bleeding and the site may be covered with a small dressing. The care team will advise when normal washing, activity and dressing removal are appropriate. Increasing pain, redness, warmth, swelling, drainage or bleeding should be reported.

The preferred timeline is individualized: a catheter should stay in place only for as long as its benefits outweigh its risks. In hospital, this may involve a daily reminder or removal protocol. At home, patients should know who to contact, how follow-up will occur and whether a planned catheter change or trial without a catheter is needed.

Acibadem International’s multidisciplinary specialists at JCI-accredited hospitals assess catheter-related needs and complications for international patients, coordinating care with the relevant urology, infectious diseases, surgical or vascular teams.

When to seek medical care

Urgent medical assessment is appropriate for fever or chills with a catheter, severe or increasing pain, sudden confusion in a person who is unwell, inability to drain urine, substantial bleeding, or a catheter that has fallen out when it is needed for ongoing drainage or treatment. These symptoms can have several causes and should not be managed by changing or reinserting the catheter at home unless specifically trained and instructed.

Contact the healthcare team promptly for new burning or lower abdominal pain, urine leaking around a urinary catheter, persistent cloudy or foul-smelling urine with symptoms, redness or discharge around an insertion site, or a blocked, kinked or damaged tube. For vascular devices, seek prompt advice for arm, neck or chest swelling, pain along a vein, or concerns about a loose dressing.

Emergency services may be needed for severe shortness of breath, chest pain, fainting, uncontrolled bleeding, signs of a serious allergic reaction or rapidly worsening illness. When in doubt, it is safer to contact the treating team or an urgent care service for individual guidance.

Frequently asked questions

What is the most common catheter risk?

The most common concerns vary by catheter type, but infection, blockage, discomfort and accidental pulling or dislodgement are frequent issues. For urinary catheters, catheter-associated urinary tract infection is a key complication, particularly when the catheter stays in place longer. Good hygiene and removal when no longer needed reduce risk.

Can a catheter cause a urinary tract infection?

Yes. A urinary catheter can allow bacteria to enter the urinary tract, especially if it remains in place for an extended period or the drainage system is opened unnecessarily. Symptoms such as fever, new pain, burning, chills or feeling generally unwell should be evaluated by a clinician.

How can catheter-associated UTI risk be reduced?

Catheter associated UTI evidence based practice emphasizes using a catheter only when necessary, using appropriate insertion technique and removing it promptly when it is no longer needed. Keeping the drainage system closed, securing tubing, maintaining hand hygiene and keeping the collection bag below the bladder are also important.

Is blood in the urine normal with a catheter?

A small amount of temporary blood or pink discoloration can occur after insertion or accidental tugging, but it should not be ignored if it persists or increases. Contact a healthcare professional for visible clots, heavy bleeding, pain, reduced drainage or dizziness. Seek urgent care if bleeding is substantial or the person feels unwell.

What should a person do if a urinary catheter stops draining?

First, check whether the tubing is kinked, compressed or positioned so that urine cannot flow into the bag, without disconnecting the system. If drainage does not resume, or there is pain, lower abdominal swelling, leakage or fever, contact the healthcare team promptly. Do not attempt to remove, replace or flush the catheter unless specifically instructed.

How long can a catheter safely stay in place?

There is no single safe duration for every person or catheter type. The goal is to use the catheter for the shortest time that safely meets the medical need, with regular review by the care team. Longer use generally increases the chance of infection and other device-related problems.

References

• Centers for Disease Control and Prevention
• World Health Organization
• National Institute for Health and Care Excellence
• European Association of Urology
• Infusion Nurses Society

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.