Stroke after surgery: could it have been caused by negligent medical care?

Experiencing a stroke during or after surgery can be devastating for both patients and their families. It often comes as a shock – particularly if the operation was expected to be straightforward or low‑risk. While some strokes are unavoidable complications and not due to any errors in care, others occur because of technical errors and care that falls below an acceptable standard. When this happens, patients may be entitled to pursue a medical negligence claim.

As part of our series exploring stroke-related medical negligence cases, this article looks at how negligent surgery can lead to a stroke, and outlines the steps you can take if you believe your stroke could have been prevented.

How can a stroke result from negligent surgery?

During any surgical procedure, doctors must follow strict standards to keep blood flow to the brain stable and to prevent clots or bleeding. If those standards are not met, the risk of stroke increases significantly.

Below are some of the most common ways unacceptable errors can cause a stroke.

Poor management of blood pressure

Anaesthetists and surgical teams are responsible for monitoring blood pressure throughout the operation. If it becomes too low, the brain may not receive enough oxygen. If it becomes too high, blood vessels may rupture.

Negligence may include:

• not checking blood pressure frequently enough;
• failing to act on dangerous readings;
• giving the wrong medication or dose.

When these errors occur, the result can be a stroke that could have been avoided.

Mistakes with blood‑thinning medication (anticoagulation)

Blood thinners (anticoagulants) must be managed very carefully around the time of surgery. Too little can cause clots; too much increases the risk of bleeding in the brain.

Negligent care usually involves either not carrying out a proper assessment of the patient’s risk profile and how their anticoagulation should be managed, or errors in documenting or following through instructions about the medication required.

These decisions can have serious consequences, including stroke.

Damage to blood vessels during a procedure

Some operations involve working close to major arteries. If a surgeon uses poor technique or fails to identify important structures, they may cause damage to a vessel. Damage to certain vessels and certainly damage that is not recognised can result in clots forming and travelling to the brain, a reduction in cerebral blood flow, and/or bleeding.

If such an injury was avoidable with appropriate care, or in itself would not be regarded as negligent but should have been identified and was not, the resulting stroke may have been entirely preventable with appropriate care.

Air or fat embolism

Air bubbles or fat particles can enter the bloodstream if proper precautions are not taken. These can travel to the brain and block blood flow. Where this obstructs blood flow to or in the brain, it can result in a stroke.

Delay in spotting the signs of stroke after surgery

Some strokes happen in the hours after an operation – a time when staff must monitor patients closely.

Failing to recognise or act on symptoms such as:

• weakness on one side;
• slurred speech;
• confusion;
• severe headache;
• drooping of the face;

can allow a treatable stroke to become life‑changing. Delay in identifying and acting on signs of a stroke post operatively may have a significant impact on outcome. The additional consequences of such an avoidable delay may form the basis of a claim.

Which types of surgery carry higher risk?

Strokes linked to negligent care are more common in surgeries involving:

• the heart;
• major blood vessels;
• the neck, such as thyroid operations or removal of neck tumours;
• the spine;
• orthopaedic procedures.

How we can help in claims for negligence following surgery

If you or a family member suffered a stroke in connection with a surgical procedure and you are worried that it could have been avoided, we can help by:

• reviewing medical records;
• obtaining independent expert evidence;
• advising you on whether you have a case;
• guiding you through the claims process with empathy;
• aiming to achieve the best possible outcome for you from the case.

We are always happy to talk through your concerns without obligation or cost, and our specialist team will provide clear advice on both the merits of a claim and what would be involved in the claims process.

Please email us at piclinnegstrokeclaims@penningtonslaw.com or call us on 0800 328 9545.

Penningtons Manches Cooper’s medical negligence team includes a specialist group of lawyers with extensive experience in claims involving strokes that should have been avoided and/or better managed with appropriate medical care.