Medical malpractice cases often involve a dense mix of medical and legal terminology that can feel overwhelming to patients and families who are already dealing with serious harm. Understanding the language used in medical records, expert reports, and court proceedings is an essential first step in recognizing whether negligent medical care may have occurred.
This glossary is the first part of a two-part series that explains commonly used medical malpractice terms in clear, accessible language. While this guide is not a substitute for legal advice, it can help injured patients better understand how medical malpractice claims are assessed under Alberta law and why certain concepts matter when building a case.
Adverse Event
An adverse event refers to an injury or complication that occurs during medical care and results in harm to a patient. Not all adverse events are caused by negligence. Some occur despite appropriate care, while others may arise from preventable errors. In malpractice litigation, determining whether an adverse event was avoidable is often central to liability.
Breach of the Standard of Care
A breach of the standard of care occurs when a healthcare provider fails to act as a reasonably competent provider would in similar circumstances. This is one of the core legal elements that must be proven in any medical malpractice claim in Alberta.
Courts rely heavily on expert medical evidence to determine whether a breach occurred, as the standard of care varies depending on specialty, available resources, and clinical context.
Causation
Causation refers to the link between the healthcare provider’s negligence and the patient’s injury. Even if a breach of the standard of care is established, a claim will fail unless it can be shown that the breach caused or materially contributed to the harm suffered.
In medical malpractice cases, causation is often contested and may involve complex medical and scientific analysis, particularly when patients already have underlying health conditions.
Clinical Practice Guidelines
Clinical practice guidelines are evidence-based recommendations intended to assist healthcare providers in making treatment decisions. While guidelines are not legally binding, they are frequently used by experts and courts as evidence of what constitutes reasonable care in a given situation.
Deviation from a guideline does not, in itself, establish negligence, but unexplained or unjustified departures may support a finding of a breach of the standard of care.
Complication
A complication is an unintended medical problem that arises during or after treatment. Complications may occur even when care is appropriate. In malpractice litigation, the focus is on whether the complication resulted from negligent care or was an accepted risk that was properly disclosed and managed.
Consent (Informed Consent)
Informed consent requires that patients be given sufficient information about the risks, benefits, and alternatives to a proposed treatment so they can make an informed decision. Failure to obtain proper informed consent can itself form the basis of a medical malpractice claim, even if the treatment was otherwise competently performed.
Alberta courts assess whether a reasonable patient in the same circumstances would have declined the treatment had the undisclosed risk been properly explained.
Damages
Damages refer to the financial compensation sought by an injured patient. In medical malpractice cases, damages may include compensation for pain and suffering, loss of income, future care costs, and other financial losses resulting from the injury.
The assessment of damages often requires extensive medical, vocational, and economic evidence.
Diagnosis (Misdiagnosis and Delayed Diagnosis)
A misdiagnosis occurs when a healthcare provider identifies the wrong condition, while a delayed diagnosis involves an unreasonable delay in identifying the correct condition. Both can have serious consequences, particularly in cases involving cancer, infections, or neurological conditions.
To succeed in a malpractice claim, it must be shown that the misdiagnosis or delay fell below the standard of care and caused harm that would likely have been avoided with a timely and accurate diagnosis.
Differential Diagnosis
A differential diagnosis is the process by which a healthcare provider considers and rules out multiple possible conditions before arriving at a final diagnosis. Failure to properly consider reasonable alternatives can support a finding of negligence, particularly when obvious warning signs are ignored.
Expert Witness
An expert witness is a qualified medical professional who provides opinion evidence on issues such as standard of care, causation, and prognosis. Expert testimony is essential in medical malpractice cases and must meet strict admissibility requirements.
In Alberta, expert witnesses owe a duty to the court, not to the party who retained them.
Hospital Liability
Hospitals may be held liable for negligent acts committed by their employees, such as nurses or technicians. Liability for physicians, who are often independent contractors, depends on the specific facts and legal relationships involved.
Hospital liability claims may involve systemic failures, inadequate policies, or understaffing that contribute to patient harm.
Iatrogenic Injury
An iatrogenic injury is harm caused by medical treatment itself, rather than by the underlying condition. Examples include surgical errors, medication overdoses, or infections acquired during hospitalization. Whether an iatrogenic injury amounts to malpractice depends on whether the injury was preventable and caused by negligent care.
Limitation Period
The limitation period is the legal deadline for starting a medical malpractice lawsuit. In Alberta, limitation rules can be complex and may depend on when the injury was discovered or ought reasonably to have been discovered.
Failing to commence a claim within the applicable limitation period (in Alberta, two years) can permanently bar recovery.
Loss of Chance
Loss of chance refers to cases where negligent care reduces a patient’s likelihood of a better outcome, such as survival or recovery. Canadian courts approach loss of chance claims cautiously, and these cases often involve nuanced causation arguments supported by statistical and expert evidence.
Medical Records
Medical records are a critical source of evidence in malpractice litigation. They document the patient’s care, clinical decision-making, and communications between providers. Inconsistencies, omissions, or altered records can raise serious concerns and may impact credibility assessments at trial.
Contact Cuming & Gillespie LLP for Knowledgeable Medical Malpractice Representation in Calgary
If you or a loved one has suffered harm during medical treatment, understanding the language used in medical malpractice cases is only the first step. Determining whether negligence occurred requires a detailed legal and medical analysis.
The medical malpractice lawyers at Cuming & Gillespie LLP represent injured patients and families in complex claims involving misdiagnosis, surgical errors, birth injuries, and hospital negligence. Contact us online or call (403) 571-0555 to discuss your situation and learn whether you may be entitled to compensation.