Not every bad result after surgery means medical negligence has occurred. Surgery always carries some risk, even when the doctor, surgeon or hospital has acted carefully.
That can be frustrating for patients, especially when the outcome is painful, unexpected or life-changing. But in a medical negligence claim, the key question is not simply whether something went wrong. The real question is whether the harm happened because of a recognised risk of the procedure, or because someone failed to provide proper care.
That difference matters because a poor outcome alone is usually not enough to prove negligence.
A Complication Is Not Always Negligence
Some complications can happen even when surgery is performed properly. These may include infection, bleeding, nerve damage, poor wound healing, anaesthetic problems, scarring, or symptoms not improving as expected.
NSW law recognises this. Under the Civil Liability Act 2002 (NSW), a person is generally not liable for harm caused by an “inherent risk”. In simple terms, that means a risk that could not have been avoided even if reasonable care and skill were used.
For example, a patient may develop an infection after surgery even though the surgical team followed proper hygiene, monitoring and treatment procedures. In that situation, the infection may be a known complication rather than negligence.
But the answer can change if the infection signs were ignored, antibiotics were delayed, follow-up care was poor, or the hospital failed to respond when the patient’s condition worsened.
That is where the line between known risk and negligence becomes important.
When a Known Risk May Still Lead to a Claim
A doctor or hospital cannot simply say, “This was a known risk,” and treat the matter as finished.
A known risk may still support a medical negligence claim if the harm was made worse by poor care. The issue is whether the treatment met the standard expected of a competent medical professional.
For example, negligence may be considered where there was:
- poor surgical technique
- failure to monitor the patient properly after surgery
- delayed response to warning signs
- poor infection management
- inadequate discharge instructions
- failure to arrange proper follow-up care
The Civil Liability Act 2002 (NSW) also deals with the standard of care expected from professionals. Section 50 refers to whether the professional acted in a way that was widely accepted in Australia by peer professional opinion as competent practice.
Put more simply, the question is often: would other competent medical professionals have acted in the same way in those circumstances? If the answer is no, the case may move beyond a normal complication and become a possible negligence claim.
Consent Can Be Just as Important as the Surgery
Sometimes the surgery itself may have been performed competently, but there may still be a legal issue if the patient was not properly warned about the risks.
Patients are generally entitled to understand the nature of the procedure, the likely benefits, the material risks, and any reasonable alternatives. NSW Health consent guidance also makes clear that patients should be given information that helps them make an informed decision.
A “material risk” does not always mean a common risk. A rare risk may still be important if it would have mattered to that particular patient.
For example, a small risk of nerve damage may be especially important to a musician, tradesperson, surgeon, driver or anyone whose work depends heavily on fine movement, strength or sensation. Even if the risk is statistically low, it may be highly relevant to that person’s decision.
In that type of case, the issue may not be whether the complication was known to medicine. The issue may be whether the patient was properly told about it before agreeing to the surgery.
Why Insurers Focus on “Known Risk”
In post-surgery claims, insurers and hospitals often argue that the outcome was a recognised complication rather than negligence. Sometimes that argument is correct. Medical treatment cannot guarantee a perfect result.
But sometimes the phrase “known risk” is used too broadly. It may be used before anyone has properly examined the operation notes, follow-up care, warning signs, consent discussions or expert medical evidence.
For example, a patient may be told that nerve injury is a known risk of surgery. That may be true. But it does not answer every question. The claim may still need to consider whether the surgeon used reasonable care, whether the risk was properly explained, whether the injury was recognised quickly enough, and whether the post-operative response was appropriate.
A known risk is not the end of the enquiry. It is only one part of it.
Practical Examples
A poor result may not be negligence if a patient was warned about a recognised risk, the surgery was performed appropriately, and the complication was managed properly.
For example, if a patient has knee surgery and develops stiffness despite proper treatment, that may be a known risk rather than negligence.
But the situation may be different if the patient repeatedly reported severe pain, swelling or fever and those warning signs were not investigated. If a delay in treatment made the outcome worse, the issue may become whether the post-surgery care fell below an acceptable standard.
Another example is cosmetic or elective surgery. A patient may accept some risk of scarring. But if they were not warned about a particular risk that would have influenced their decision, or if the result was caused by poor technique, there may still be grounds to investigate a claim.
What Evidence Usually Matters?
Post-surgery negligence claims often depend on detail. The most important evidence may include:
- consent forms
- notes from pre-surgery consultations
- operation records
- hospital progress notes
- discharge instructions
- follow-up appointment records
- photos of the injury or complication
- GP or specialist notes after surgery
- independent expert medical opinion
Consent forms can be important, but they do not always prove the full discussion. A signed form may show that consent was given, but the real issue may be what the patient was actually told, what questions they asked, and whether the important risks were explained in a way they could understand.
The Main Question Is What Caused the Harm
In many post-surgery compensation claims, the issue is not whether the patient suffered harm. That may be clear. The harder question is why the harm happened.
If the harm occurred because of an unavoidable risk, the claim may be difficult to prove. If the harm occurred because of poor treatment, delayed care, inadequate warning or lack of informed consent, the situation may be different.
That is why medical negligence compensation claims often require careful review of both the medical records and the legal issues.
Getting Advice Can Help Clarify the Difference
A disappointing or painful surgical outcome does not automatically mean there is a claim. But patients should not assume they have no rights simply because an insurer, hospital or doctor says the problem was a “known risk”.
The real question is whether the risk was unavoidable, whether the care was reasonable, and whether the patient was properly warned before the procedure.
Law Advice’s team of medical negligence compensation lawyers assists people in assessing whether post-surgery harm reflects a known risk or whether there may be grounds for a medical negligence claim. This may include reviewing treatment records, consent discussions, expert evidence and the way the complication was managed after surgery.