Cannula Negligence Claims

Written by Tanya Waterworth, Digital Content Writer

About Our Legal Expert: This content is produced with oversight by Michael Jefferies, Managing Director who has over 30 years’ legal experience.

Incorrect Insertion, Poor Monitoring & Left‑In Too Long

Despite being a common procedure, cannulas are not risk-free and cannula negligence claims happen if a patient is injured due to clinical negligence. Healthcare professionals use cannulas every day across hospitals, clinics, and GP practices. They are routine, quick to insert, and essential for delivering fluids, medication, and blood products. But healthcare providers can cause avoidable harm when they insert a cannula incorrectly, fail to monitor it properly, or leave it in place for too long.

These injuries may be painful and long-lasting and you may be entitled to bring a cannula negligence claim.

Why Cannula Negligence Happens

Cannulation is a basic clinical skill, but it still requires competence, attention, and proper monitoring. Negligence usually arises in the following three key scenarios:

1.Incorrect Insertion

A cannula must be inserted into a vein using the correct technique, angle, and size. Negligence may occur when:

• The clinician inserts the cannula into the wrong location
• Excessive force is used
• The wrong gauge cannula is chosen
• A trainee inserts the cannula without supervision
• Multiple failed attempts are made without escalation

Incorrect insertion can damage nerves, arteries, and surrounding tissue. It can also cause the cannula to sit incorrectly in the vein, increasing the risk of infiltration or extravasation.

2. Failure to Monitor

Once a cannula is in place, it must be checked regularly. NHS guidelines require staff to inspect the site for signs of infection, swelling, leakage, or pain. Negligence can occur when:

• Staff fail to check the cannula site during drug administration
• Alarms or patient complaints are ignored
• The cannula is left untouched for long periods
• Early signs of complications are missed

Monitoring is essential because many cannula‑related injuries develop gradually. Therefore, even a quick inspection could prevent serious harm.

3. Leaving a Cannula in Too Long

Cannulas should not remain in place indefinitely. Negligence arises when:

• A cannula is left in for days longer than recommended
• No documentation shows when it was inserted
• Staff fail to remove a cannula after it is no longer needed
• A cannula is left in place after signs of infection appear

Leaving a cannula in too long significantly increases the risk of infection and thrombophlebitis.

Common Complications Caused by Cannula Negligence

Healthcare professionals can cause a range of avoidable complications when they do not perform or monitor cannulation properly. These may include:

Extravasation

Extravasation occurs when medication leaks out of the vein into surrounding tissue. This may cause:

• Severe tissue damage
• Blistering
• Ulceration
• Permanent scarring
• Loss of function in the affected limb

Infiltration

Infiltration is like extravasation, but involves non‑irritant fluids. It can still cause:

• Pain
• Swelling
• Reduced mobility
• Tissue firmness
• Delayed treatment

Infiltration usually occurs when a cannula is incorrectly positioned or becomes dislodged.

Infection

A cannula breaches the skin barrier, so infection is a known risk. Negligence increases the likelihood of:

• Localised infection
• Cellulitis
• Abscess formation
• Sepsis

Infections often arise when cannulas are left in too long or inserted using poor hygiene.

Thrombophlebitis

This is inflammation of the vein caused by irritation, infection, or clot formation. Symptoms include:

• Redness
• Heat
• Pain
• A hard, cord‑like vein

Thrombophlebitis can be extremely painful and may require antibiotics or anticoagulants.

Nerve or Arterial Damage

Incorrect insertion can cause direct trauma to nerves or arteries. This may lead to:

• Shooting pain
• Numbness
• Tingling
• Loss of function
• Long‑term nerve injury

These injuries are often avoidable with correct technique.

When Cannula Complications Amount to Negligence

Not every cannula complication may be caused by negligence. Some risks exist even when care is reasonable. However, negligence may have occurred if:

• The cannula was inserted incorrectly
• Staff ignored your complaints of pain or swelling
• The cannula site was not checked regularly
• The cannula was left in longer than recommended
• You developed an infection due to poor hygiene
• You suffered extravasation because staff failed to monitor the infusion
• Documentation was missing or inaccurate

If your injury could have been avoided with proper care, you may have grounds for a claim.

How to Start a Cannula Negligence Claim in the UK

Bringing a clinical negligence claim may feel daunting, but the process is more straightforward than many people expect. Here’s how to begin:

Seek Medical Attention

Your health comes first. If you’re still experiencing symptoms after a cannula injury, get medical advice immediately. This also creates a clear record of your injury.

Gather Evidence

Useful evidence includes:

• Photographs of the cannula site
• Medical records
• Discharge summaries
• Details of the staff involved
• Dates and times of the cannulation
• Notes of conversations or complaints you made
• Witness statements from family or friends

You don’t need everything at the start, your solicitor can obtain your medical records later.

Contact a Clinical Negligence Solicitor

Choose a solicitor who specialises in cannula and IV‑related injuries. They will:

• Assess whether you have a valid claim
• Explain the process clearly
• Obtain expert medical evidence
• Handle all communication with the NHS or private provider
• Work on a No Win, No Fee basis in most cases

A specialist solicitor will identify whether the care you received fell below an acceptable standard and whether this caused your injury.

The Investigation Stage

Your solicitor will:

• Request your medical records
• Instruct an independent medical expert
• Assess the long‑term impact of your injury
• Calculate your financial losses

This stage builds the foundation of your claim. Once the evidence is ready, your solicitor will send a formal Letter of Claim to the health care provider.

Negotiation and Settlement

Most cannula negligence claims settle without going to court. However, clinical negligence claims can be complex. Your solicitor will negotiate on your behalf to secure fair compensation for:

• Pain and suffering
• Loss of earnings
• Medical treatment
• Travel expenses
• Care and assistance
• Future losses

If settlement isn’t possible, your solicitor may issue court proceedings, but even then, many cases resolve before trial.

Contact Us for Your Free Consultation

Following the correct protocols usually prevents cannula injuries. When healthcare professionals fail to insert, monitor, or remove a cannula safely, patients can suffer avoidable harm.

Contact our professional team on 0333 358 3034. Alternatively, complete our online contact form to arrange your free, no-obligation telephone consultation.

This blog is for informational purposes only and does not constitute legal or medical advice. Always consult with a medical professional and a qualified solicitor to understand your specific circumstances.