Performing Autopsy Protocols

Performing Autopsy Protocols

Structures autopsy examination with organ system review, cause-of-death determination, and documentation.

Why This Skill Exists

The autopsy remains the definitive method for determining cause and manner of death, verifying clinical diagnoses, identifying unsuspected disease, and advancing medical knowledge. Studies consistently show clinical-autopsy discordance rates of 10-30%, with major discrepancies (Class I and II errors per the Goldman classification) that would have changed treatment or outcome. Hospital autopsy rates have declined from over 50% to below 5%, making each autopsy more valuable for quality assurance and education.

CAP accreditation (AUT checklist series) requires documented autopsy protocols, minimum turnaround times, and quality review processes. The National Association of Medical Examiners (NAME) sets accreditation standards for forensic autopsies. Regardless of jurisdiction, autopsies must follow a systematic organ-by-organ approach, maintain chain of custody for medicolegal cases, and produce reports that meet both clinical and legal standards. CLIA does not directly regulate autopsies, but laboratory testing performed on autopsy specimens (cultures, histology, toxicology) falls under CLIA jurisdiction.

Checkpoint A: Pre-Draft Intake (Mandatory)

1. Autopsy type — Hospital (clinical) autopsy, forensic/medicolegal autopsy, or limited/restricted autopsy? Default: hospital complete autopsy.
2. Authorization — Signed consent from legal next of kin (hospital) or jurisdiction authority (medicolegal)? Default: not yet obtained; flag [VERIFY].
3. Restrictions — Any organ systems excluded by consent? Retain brain? Default: no restrictions.
4. Clinical history — Terminal admission summary, past medical history, cause-of-death questions from clinical team? Default: request from medical records.
5. Infectious precautions — Known or suspected bloodborne pathogens, tuberculosis, prion disease, highly infectious agents? Default: standard precautions.
6. Medicolegal status — Has the medical examiner/coroner been notified and declined jurisdiction? Default: yes, ME/coroner declined.
7. Special studies — Are cultures, toxicology, cytogenetics, electron microscopy, or research tissue collection anticipated? Default: routine histology and toxicology.

Documents to Request

• Autopsy consent/authorization form
• Complete medical records (admission notes, operative reports, discharge summary)
• Imaging reports (CT, MRI, angiography)
• Laboratory results from terminal admission
• Medication administration record
• Clinical team's specific questions about cause of death
• Prior surgical pathology reports
• Medical examiner/coroner notification documentation
• Chain-of-custody forms if medicolegal

Step 1: External Examination

Perform a systematic external examination and documentation:

1. Identification: Verify decedent identity with wristband and toe tag. Photograph face for identification.
2. General description: Age, sex, race, height (cm), weight (kg), nutritional status, body habitus.
3. Clothing and personal effects: Document and inventory (especially medicolegal cases).
4. External findings:
   • Skin: Lividity pattern and fixation (indicates position at death), rigor mortis stage
   • Scars: Surgical scars (document location, length, orientation), traumatic scars
   • Therapeutic devices: IV sites, surgical drains, endotracheal tube, pacemaker
   • Injuries: Contusions, lacerations, abrasions, gunshot wounds (measure, describe, photograph)
   • Decomposition changes: Stage (fresh, bloat, active decay), insect activity
5. Eyes: Corneal clarity, petechiae (scleral, conjunctival), pupil size.
6. Oral cavity: Dentition, airway obstruction, mucosal lesions.
7. Photograph all significant findings per institutional protocol.

Step 2: Internal Examination — Evisceration and Organ Dissection

Follow a standardized evisceration technique (Virchow, Rokitansky, Ghon, or en-bloc per institutional protocol):

Organ System Review

Step 3: Ancillary Studies

Order and collect specimens for ancillary testing as indicated:

• Histology: Submit sections from each major organ per CAP AUT.07700 (minimum sections: heart x4, lung x4, liver x2, kidney x2, spleen x1, pancreas x1, plus any lesional tissue).
• Microbiology: Blood cultures (percutaneous and cardiac), lung tissue, CSF, urine, other fluids as indicated. Collect before evisceration when possible.
• Toxicology: Femoral blood (peripheral, not cardiac to avoid postmortem redistribution), urine, vitreous humor, liver tissue, gastric contents.
• Cytogenetics/molecular: Fresh tissue for karyotype, FISH, or molecular studies if hematologic malignancy or genetic disease suspected.
• Electron microscopy: Fix tissue in glutaraldehyde for renal disease, myocardial disease, or storage diseases.
• Neuropathology: If brain retention is authorized, fix in 10% formalin for 2-3 weeks before dissection.
• Photography: Document all significant gross findings before and during sectioning.

Step 4: Cause and Manner of Death Determination

Apply the WHO International Classification of Diseases (ICD) format for cause-of-death certification:

Part I (chain of causation):

• 1a. Immediate cause of death (e.g., pulmonary thromboembolism)
• 1b. Due to, or as a consequence of (e.g., deep vein thrombosis)
• 1c. Due to, or as a consequence of (e.g., immobilization following hip fracture)
• 1d. Due to, or as a consequence of (e.g., fall)

Part II (contributing conditions):

• Other significant conditions contributing to death but not in the causal chain (e.g., diabetes mellitus, coronary artery disease)

Manner of death (medicolegal only): Natural, accident, suicide, homicide, undetermined, or pending investigation.

Classification of discrepancies (Goldman criteria for hospital autopsies):

• Class I: Missed major diagnosis that would have changed therapy and potentially outcome
• Class II: Missed major diagnosis that would not have changed therapy (terminal event)
• Class III: Missed minor diagnosis related to terminal disease
• Class IV: Missed minor diagnosis not related to terminal disease

Step 5: Report Assembly and Finalization

Construct the autopsy report per CAP AUT checklist requirements:

1. Clinical summary: Relevant history, terminal course, clinical diagnoses, and clinical questions.
2. External examination: Complete description with measurements.
3. Internal examination: Organ-by-organ findings with weights and measurements.
4. Microscopic description: Section-by-section findings.
5. Ancillary results: Toxicology, cultures, special stains, molecular studies.
6. Final anatomic diagnoses: Numbered list in order of significance, with cause of death as first diagnosis.
7. Clinicopathologic correlation: Narrative synthesizing findings with clinical history.
8. Cause of death statement: Formatted per WHO ICD death certificate standard.

Turnaround time: Per CAP AUT.08850, preliminary report within 2 working days; final report within 30-60 calendar days.

Checkpoint B: Post-Draft Alignment (Mandatory)

1. Is the identity verification documented with at least two identifiers?
2. Are all organ weights recorded and compared to expected normal ranges?
3. Does the cause-of-death statement follow WHO ICD chain-of-causation format?
4. Are clinicopathologic discrepancies classified per Goldman criteria?
5. Are all ancillary study results integrated into the final report or noted as pending?

Quality Audit

• Autopsy authorization/consent documented before procedure
• Medical examiner/coroner notification documented for reportable deaths
• External examination complete with photographs of significant findings
• All major organs weighed and compared to reference ranges
• Coronary arteries cross-sectioned at 3mm intervals with degree of stenosis documented
• Minimum histology sections submitted per CAP AUT.07700
• Toxicology specimens collected from appropriate sites (femoral blood, not cardiac)
• Microbiology cultures collected before evisceration when possible
• Cause-of-death statement follows WHO ICD chain-of-causation format
• Goldman classification applied for clinical-pathologic discrepancies
• Preliminary report issued within 2 working days
• Final report completed within 30-60 calendar days
• Chain of custody maintained for medicolegal cases
• Infectious precautions documented and appropriate PPE used

Guidelines

• Always verify decedent identity with two identifiers before beginning the external examination
• Collect toxicology specimens from femoral blood (not cardiac blood) to avoid postmortem redistribution artifacts
• Cross-section all three coronary arteries at 3mm intervals and document the degree and location of stenosis for every autopsy
• Weigh all major organs and compare to published reference ranges adjusted for age, sex, and body habitus
• Follow WHO ICD format for cause-of-death certification; the chain of causation must be logically consistent (each line causes the one above it)
• For hospital autopsies, always classify clinical-pathologic discrepancies using the Goldman system and report findings to the clinical team for quality improvement
• Issue a preliminary anatomic diagnosis within 2 working days to serve immediate clinical and family needs
• Maintain strict chain-of-custody documentation for all medicolegal cases; photograph, label, and store retained specimens per NAME or institutional standards