1. Types of Medical Malpractice Damages in Canada

Once negligence is proven, Canadian courts typically award:

A. Pecuniary (Financial) Damages

These are measurable monetary losses:

• Past and future income loss
• Cost of future care (nursing, rehabilitation, medication)
• Out-of-pocket medical expenses
• Home modifications (wheelchair access, etc.)

B. Non-Pecuniary Damages (Pain and Suffering)

Compensation for:

• Physical pain
• Psychological suffering
• Loss of enjoyment of life

🔴 Important: Canada has a judicial cap on non-pecuniary damages (from the “trilogy” cases), currently around $400,000+ (adjusted for inflation).

C. Loss of Income Earning Capacity

Even if the plaintiff is not fully employed before injury, courts assess:

• Likely career trajectory
• Reduced earning ability

D. Cost of Future Care

Often the largest component in serious injury cases:

• Lifelong medical care
• Therapy and assistance
• Institutional care if needed

2. Key Case Laws in Canadian Medical Malpractice

Now let’s look at major SCC cases shaping damages and liability.

Case 1: Reibl v Hughes (1980)

Core Issue:

Informed consent + causation in medical negligence

Facts:

• Plaintiff underwent surgery for carotid artery disease
• Doctor failed to properly disclose risks (including stroke risk)
• Plaintiff suffered a stroke post-surgery

Legal Question:

Would the plaintiff have refused surgery if properly informed?

Decision:

SCC established a “modified objective test” for causation:

Would a reasonable person in the plaintiff’s position, properly informed, have refused treatment?

Importance for Damages:

• Even if negligence (failure to warn) is proven, damages depend on causation
• Court emphasized that injury must be linked to what the patient would have done differently

Impact:

This case is foundational in informed consent malpractice claims, shaping compensation eligibility.

Case 2: ter Neuzen v Korn (1995)

Core Issue:

Standard of care for doctors in specialized or risky procedures

Facts:

• Plaintiff contracted HIV from artificial insemination
• Doctor followed accepted medical practice at the time
• HIV risk was not fully understood in semen handling

Legal Question:

Can a doctor be negligent if they follow standard professional practice?

Decision:

SCC held:

• Doctors are generally judged by standard professional practice
• Courts should not second-guess complex medical judgments without strong evidence

Damages Significance:

• Even if harm is severe (HIV infection), no liability = no damages
• Reinforces that damages depend on breach of standard of care

Key Principle:

Medical malpractice is not strict liability—fault must be proven through deviation from accepted practice

Case 3: Arndt v Smith (1997)

Core Issue:

Causation in failure-to-warn (informed consent) cases

Facts:

• Pregnant woman vaccinated for rubella
• Doctor warned her of some risks but not full range
• Child was born with congenital defects

Legal Question:

Did inadequate warning cause the injury?

Decision:

SCC reinforced a counterfactual causation analysis:

• Would the patient have acted differently if fully informed?

Damages Impact:

• Even if there is breach of duty, damages only flow if:
  • The patient would have avoided the risk
  • And injury would not have occurred

Key Importance:

Strengthened causation burden in malpractice claims involving consent.

Case 4: Walker Estate v York Finch General Hospital (1999)

Core Issue:

Medical negligence in blood transfusion screening (HIV infection case)

Facts:

• Blood donor screening process failed
• Patient contracted HIV from contaminated blood

Legal Question:

Were hospitals and Canadian Red Cross negligent in screening procedures?

Decision:

SCC found negligence in the system of blood collection and screening.

Damages Significance:

This case is important for:

• Systemic negligence liability (not just individual doctors)
• Recognition of large-scale compensation for catastrophic harm

Damages Outcome:

• High-value damages awarded for lifelong care and loss of quality of life
• Reinforces that catastrophic injury leads to:
  • Lifetime care costs
  • Substantial non-pecuniary damages (within cap)
  • Full income replacement

Case 5: Benhaim v St-Germain (2016)

Core Issue:

Causation and “loss of chance” in medical malpractice

Facts:

• Patient had lung cancer
• Doctors allegedly failed to diagnose earlier
• Delay reduced survival prospects

Legal Question:

Can plaintiffs recover damages for “loss of chance” of survival?

Decision:

SCC held:

• Canada does NOT recognize pure loss of chance as a separate head of damages
• Plaintiff must prove balance of probabilities causation (more likely than not)

Damages Impact:

• If plaintiff cannot show >50% chance earlier treatment would have helped:
  • No compensation for lost chance alone

Key Principle:

Strict causation rule limits speculative damages in medical malpractice.

3. How Courts Actually Calculate Damages in Practice

After liability is proven, courts use structured reasoning:

Step 1: Determine life impact

• Permanent disability?
• Reduced lifespan?
• Cognitive or physical impairment?

Step 2: Calculate income loss

• Past earnings lost
• Future earning capacity discounted to present value

Step 3: Future care costing

• Expert actuarial projections
• Lifetime medical and support needs

Step 4: Non-pecuniary damages

• Pain, suffering, emotional loss
• Subject to SCC cap

4. Key Legal Principles Emerging from These Cases

Across all cases, Canadian courts consistently apply:

1. Fault-based liability

No automatic compensation for medical harm

2. Strong causation requirement

Must prove harm was likely caused by negligence

3. Professional standard of care

Courts defer heavily to medical expertise

4. Limited recognition of speculative loss

No recovery for uncertain “chance” losses

5. Structured damages calculation

Especially for catastrophic injury cases