1. Spinal Decompression Sickness Misdiagnosed as Ischemic Stroke

A 34-year-old recreational scuba diver developed sudden leg weakness, numbness, and urinary retention within 30 minutes of surfacing after a deep dive.

Initial clinical interpretation:

Emergency physicians diagnosed acute ischemic stroke based on:

• Sudden neurologic deficit
• Lower limb weakness
• No obvious trauma

The patient was sent for CT brain imaging and stroke observation protocol.

What was missed:

• Recent diving history was not properly emphasized
• Symptoms began immediately after ascent (classic DCS timing)
• Presence of back pain and tingling (common spinal cord DCS signs)

Outcome:

• Hyperbaric oxygen therapy was delayed by ~18–24 hours
• The patient developed permanent paraparesis

Medico-legal issue:

Court findings in similar cases often focus on:

• Failure to take proper diving history
• Failure to consult hyperbaric medicine specialists
• Misapplication of stroke protocol without differential diagnosis

2. Inner Ear DCS Misdiagnosed as Labyrinthitis / Vestibular Neuritis

A 29-year-old diver presented with:

• Severe vertigo
• Vomiting
• Loss of balance after a rapid ascent

Initial diagnosis:

ENT evaluation suggested:

• Viral labyrinthitis
• Or benign vestibular neuritis

Patient was treated with:

• Anti-vertigo medication
• Steroids
• Bed rest

What was missed:

Inner ear DCS often mimics vestibular disease but key red flags were:

• Immediate onset after dive
• No viral prodrome (fever, infection signs)
• History of rapid ascent and deep dive

Outcome:

After 2 days, neurological symptoms worsened, and hearing loss became permanent.

Legal relevance:

• Failure to recognize diving-related etiology
• Delay in recompression therapy leading to irreversible vestibular damage
• Courts in such cases often classify this as failure of differential diagnosis in emergency ENT care

3. Musculoskeletal DCS Misdiagnosed as Sprain or Muscle Strain

A 41-year-old commercial diver developed:

• Severe shoulder and elbow pain (“the bends”)
• Joint stiffness immediately after a saturation dive

Initial diagnosis:

• Rotator cuff strain
• Overuse injury

He was discharged with:

• NSAIDs
• Muscle relaxants

What was missed:

• Pain started within minutes of surfacing
• Multiple joint involvement (shoulder + knees)
• Pain described as “deep, boring, and migratory” rather than mechanical injury

Outcome:

• Progression to neurological involvement (numbness, fatigue)
• Partial disability affecting ability to work

Legal implications:

• Employer negligence claim for lack of diving medical protocol
• Failure to provide immediate hyperbaric referral
• Courts in similar cases emphasize occupational duty of care in commercial diving operations

4. Cerebral Arterial Gas Embolism (AGE) Misdiagnosed as Seizure Disorder

A diver surfaced rapidly after equipment failure and immediately experienced:

• Loss of consciousness
• Generalized convulsions
• Postictal confusion

Initial diagnosis:

• Epileptic seizure (new-onset epilepsy)

Patient was started on:

• Antiepileptic medication
• Neurology follow-up

What was missed:

AGE and DCS neurological forms can mimic seizures but key clues included:

• Immediate post-dive onset
• No prior seizure history
• Presence of dive equipment malfunction event

Outcome:

• No hyperbaric treatment administered in time
• Persistent cognitive impairment and memory loss

Legal focus:

• Misdiagnosis due to anchoring bias (“looks like epilepsy”)
• Failure to perform dive-related history review
• Courts often treat this as serious diagnostic negligence due to failure to consider environmental causes of neurological collapse

5. DCS Misdiagnosed as Anxiety / Hyperventilation Syndrome

A 26-year-old beginner diver experienced:

• Chest tightness
• Shortness of breath
• Tingling in arms and face after ascent

Initial diagnosis:

• Panic attack / anxiety reaction

He was given:

• Sedatives
• Discharged without observation

What was missed:

• Neurological symptoms (paresthesia) are not typical anxiety features
• Recent ascent from depth with rapid pressure change
• Mild confusion and fatigue developing shortly after

Outcome:

• Symptoms progressed to spinal cord involvement
• Delayed hyperbaric treatment resulted in long-term sensory deficits

Legal issue:

• Failure to distinguish psychiatric symptoms from hypoxic or decompression-related pathology
• Courts often highlight danger of premature psychiatric labeling in emergency medicine

6. Pulmonary DCS Misdiagnosed as Asthma or Pulmonary Embolism

A 38-year-old diver developed:

• Sudden chest pain
• Cough and shortness of breath
• Drop in oxygen saturation after ascent

Initial diagnosis:

• Asthma exacerbation
• Later considered pulmonary embolism

Treatment given:

• Bronchodilators
• Anticoagulants (in some cases)

What was missed:

• Lung overexpansion injury or venous gas emboli
• Temporal relation with dive ascent
• Absence of chronic asthma history

Outcome:

• Worsening neurologic symptoms due to untreated embolic phenomena
• Long-term cardiopulmonary impairment

Legal implications:

• Mismanagement of diving-related pulmonary emergency
• In some cases, litigation centered on inappropriate anticoagulation given instead of recompression referral

Key Legal and Medical Themes Across All Cases

Across diving injury litigation and medical negligence reviews, courts and expert panels repeatedly identify these recurring failures:

1. Failure to take diving history

This is the single most common error.

2. Cognitive bias in emergency diagnosis

Doctors often anchor on:

• Stroke
• Seizure
• Anxiety
• Orthopedic injury

3. Delay in hyperbaric oxygen therapy

Even a delay of 6–12 hours can significantly worsen outcomes.

4. Failure to refer to hyperbaric specialists

Hospitals without dive medicine expertise often miss early diagnosis.

5. Occupational negligence (commercial diving cases)

Employers may be liable for:

• Lack of decompression protocols
• Delayed evacuation
• Inadequate training or emergency planning

Conclusion

Decompression sickness misdiagnosis is not just a clinical error—it is frequently a medico-legal issue involving preventable permanent neurological injury. The core problem is that DCS mimics many common conditions (stroke, vertigo disorders, psychiatric illness, musculoskeletal injury), but correct diagnosis depends heavily on timing + diving history + awareness of pressure-related injury mechanisms.