Death Investigation Flashcards

1
Q

Define Death

A

Death is a process not an event
Time of death is recorded as an event
No legal definition
- when doctor records it

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2
Q

Define taphophobia

A

Fear of being berried alive
Many “genuine” published accounts of premature burial
Fear peaked during cholera epidemics of 18th and 19th centenary

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3
Q

Features of safety coffins

A
Ropes of levers inside
- to bell, flags or pyrotechnics
Rope to church bells
Window in coffin
Trumpet tube
Hatched with key inside
Air/feeding tubes
Food and water supply
Shovel
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4
Q

Types of safety coffins

A

Portable death chamber
- chamber with bell and window and placed over empty grave
- watchman checked for signs of life or putrefaction over a few days
- floor opened to grave and chamber reused
Taberger Coffin design
- strings to head, hands and feet of corpse
- attached via tube to bell above ground
- housing prevented accidental ringing
- netting prevented insects entering coffin

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5
Q

Types of death

A
Apparent death 
- collapse, no pulse
- opportunity for resuscitation
- cardiac arrest, LOC
Brain death
- cerebral cortex - 1st
- brain stem - 2nd
- whole brain
Somatic (clinical) death of person as whole
Cellular/molecular death
Putrefaction
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6
Q

Define resusciation

A

To bring someone or something back to life or consciousness
To revive from unconscious
Make active or vigorous again

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7
Q

Types of cardio-pulmonary resuscitation

A
Mouth to mouth resuscitation
External cardiac massage
Defibrillation 
Drugs - adrenaline and atropine
Intubation and ventilation
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8
Q

Features of apparent death (suspended animation)

A
No or minimal signs of life
Responsive to prolonged resuscitation
Recognised in certain situations
- electrocution
- drowning
- drug overdose
- hypothermia
- cardiac arrest in children
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9
Q

Clinical assessment of death

A
History and circumstances
Signs
- collapse with LOC and muscle flaccidity
- cessation of heartbeat
- cessation of breathing
- dilated fixed pupils
Physical examination
Resuscitate if in doubt
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10
Q

Clinical triad of death

A
Triad of Bichat
Failure of body as integrated system associated with irreversible loss of
- circulation
- respiration
- innervation - consciousness
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11
Q

Stages of natural cardiac death

A
Disease or injury
- MI
Primary cardiac arrest
Cerebral hypoxia
- cortex in 2-3 mins
- brainstem in > 4 mins
- whole brain
Secondary respiratory arrest
- brainstem controls breathing
Somatic death
Cellular death
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12
Q

Stages of natural respiratory arrest

A
Disease of injury
- COPD, asthma, PE
Primary respiratory arrest
Cerebral hypoxia
- cortex in 2-3 mins
- brainstem in > 4 mins
- whole brain
Secondary cardiac arrest
Somatic death
Cellular death
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13
Q

Causes of brain death

A
Cardiac arrest
Other hypoxia
Haemorrhage
Stroke
Poisoning
Hypoglycaemia
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14
Q

Function of brain sections

A
Cortical
- higher functions
- emotions
- sensation
- movement
Brainstem
- consciousness (RAS)
- respiratory centre
- vasomotor centre - pulse and BP
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15
Q

Define whole brain death

A
No legal definition
Brain death is nearest equivalent
Necessary component is brainstem death
- innervation
- spontaneous respiration
- heartbeat
Bedside clinical diagnosis
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16
Q

Define persistent vegetative state

A

Cortical damage
- cardiac arrest, hypoxia, trauma, poisoning, hypoglycaemia
Brainstem intact
- spontaneous breathing and heartbeat
- eyes open/close cyclically, swallow, grimace intact
Awake but unaware of self or environment
No speech or purposeful movement
May live many years with nutritional support

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17
Q

Diagnosis of PVS

A

Brain damage
No awareness of self or environment
No reversible causes
Duration > 6 months
Assessment includes
- no spontaneous meaningful motor response including voice
- no language comprehension or expression
- no sustained, reproducible, purposeful or voluntary behavioural response to normal or noxious visual, auditory or tactile stimulus
Cortical death seen post-mortem

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18
Q

PVS vs BS Death

A
PVS
- cortex dead
- awake but unaware
- spontaneous breathing
- spontaneous heartbeat
- moral dilemma - should they be allowed to die as no way back for higher functions
BS Death
- BS destroyed
- unconscious
- artificial ventilation
- spontaneous heartbeat
- no moral dilemma - stop ventilating corpse
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19
Q

Brainstem functions

A
Maintains consciousness
- reticular activating system
Initiates every breath
- respiratory centre
Controls heart rate and BP
- vasomotor centre
All sensory input from whole body to cortex passes through brainstem - apart from smell and vision
All motor output from cortex passes through BS
Medicates cranial nerve reflexes
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20
Q

Cranial nerves

A
Olfactory - smell
Optic - sight
Oculomotor - eye movement
Trochlear - eye movement
Trigeminal - face sensory
Abducens- eye movement
Facial - muscular control of face
Vestibulo-cochlear - balance and hearing
Glossopharyngeal - swallow, breathing
Vagus - swallow, breathing, heart rate, intestines
Accessory - muscles of shoulders
Hypoglossal - muscles of tongue
2-10 can be tested at the bedside
- 1, 11 and 12 cannot
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21
Q

Brainstem death UK code

A

Tests performed by 2 senior Drs (>5yrs)
Appropriate specialist
Tests repeated

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22
Q

Signs of BS activity

A
Epileptic fit
- sign of cortical activity
- motor nerves intact
Decorticate rigidity
Doll's eye reflex
- eyes remain fixed on moving head
23
Q

Diagnosis of BS Death

A
Preconditions
- deeply comatosed, requiring artificial ventilation
- cause of coma known
- reversible causes excluded 
     - drugs
     - alcohol
     - hypothermia
     - diabetes
     - hypothyroidism
     - hypoxia
     - hypotension
     - SOL
Clinical tests
- pupils do not react to light - 2,3
- no corneal reflex - 3,5,7
- no nystagmus upon ear irrigation - 3,4,6,8
- no grimace to pain - 5,7
- no gag reflex - 9,10
24
Q

Features of the apnoea test

A

100% O2 for 10 mins
5% CO2 for 5 mins
Disconnect from ventilator for 10 mins
Rising CO2 fails to stimulate spontaneous breathing

25
Features of cellular death
``` Selective vulnerability to cessation of circulation - CNS - 4 mins - peripheral NS - 5 mins - muscle - 3 hours - blood cells - 6 hours - skin - 24 hours - bone, cornea - 48 hours Cells die and degenerate due to autolysis - by intracellular enzymes ```
26
Pros/cons of organ transplants
``` Better than mechanical devices Rejection - host antibody attacks donor antigens Tissue typing for compatibility Immuno-suppression - rejection vs infection ```
27
Types of transplant
``` Homologous - same patient - skin graft - bone graft - own blood Live donor - blood - bone marrow - kidney - part liver Cadaveric - heart and lungs - kidneys, liver - cornea - bone - sources - BS death due to RTA, SAH ```
28
Key points of the Human Tissue Act 2004
Regulates removal, storage and use of human tissue Creates new offense of DNA theft Makes it lawful to preserve organs of deceased for transplantation Authorises museums to move human remains
29
Key points of Human Tissue (Scotland ) Act 2004
Transplantation - use of parts of deceased body for transplantation, research etc - prohibits commercial dealings in human body parts for transplantation Post-mortem examinations - allows for authorisation of hospital post-mortems when alive or by family - non-legal cases for medical interest Tissue or organs no longer required for Procurator Fiscal purposes Defines nearest relative
30
Key features of Anatomy Act 1832
Passed to stamp out body-snatching Anatomists needed a licence - issued by Home Secretary Responsibility for the proper treatment of all bodies dissected in the building Med schools had legal access to unclaimed bodies - deaths in prison and workhouses
31
Purposes of Death Certificate
Information - relatives, statistics, epidemiology, research Disposal of body - official recognition, registration and funeral Proof of death - grieving, insurance, litigation, benefits
32
Death certification in Scotland
``` Any Dr who knows cause of death Need not have attended in last illness Need not view body after death Whole death certificate given to informant (relative) 7 days to register death ```
33
Death certification in England and Wales
Dr who attended during last illness (<14 days) or Dr who attended regularly during last illness and have viewed body Dr seeing body for first time may not certify Slip given to informant 5 days to register death
34
Key points for completion of death certification
``` Use precise pathological terms - infarction, atherosclerosis, carcinoma Avoid imprecise terms - cardiorespiratory arrest, failure, come, old age Avoid abbreviations No need to fill every line 1a = immediate cause, due to 1b = antecedent cause due to 1c = antecedent cause due to 1d = underlying cause 2 = other influencing factors ```
35
Define stillbirth
A child that has issued forth from its mother after 20th week of pregnancy and which did not at any time after being completely expelled from its mother breath or show any signs of life Less than 20 weeks = miscarriage and does not need a death certificate
36
Things need to dispose of body
``` Death certificate Death registered Issued certificate of disposal Funeral arrangements - burial cremation Notification of disposal back to registrar ```
37
Cremation forms needed
``` Application for cremation - issued by funeral directors - completed by relative in charge - countersigned by person in authority Medical certificate - completed by dr who issued death certificate Confirmatory medical certificate - completed by doctor registered > 5 years Authority from registrar Authority form PF/coroner Authority to cremate - issued by medical referee to crematorium ```
38
Death investigation purposes
Detection of homicide Investigation of other unnatural deaths Protection of citizen's rights Statistics and audit
39
Death investigation principles
``` Expedient Thorough Impartial Respectful of relative's rights E&W - 20% population autopsy rate - 33% of deaths referred - 60% have autopsy Scotland - 10% population autopsy rate - 24% deaths referred - 40% have autopsy ```
40
Key features of Scottish Legal System
Developed independently of E&W until union in 1707 then developed in parallel Duty of PF to inquire into sudden, suspicious, accidental, unexpected and unexplained death occurring in their jurisdiction In pursuance of public interest to eradicate dangers to health and life, allay public anxiety and ensure full and accurate statistics
41
Decision to issue DC or refer to PF
``` Was death primarily natural or unnatural Any unnatural factors - assault - RTC - accident - fall Do not refer to PF because relative refuse permission for hospital autopsy ```
42
Deaths to refer to PF
``` Uncertified death Outdoor death, residence unknown Violent, suspicious or unexplained Sudden and unexpected Accident involving a vehicle Any other accident Death at work Industrial accident, disease or poisoning Circumstances suggest suicide Poisoning - accidental or deliberate Death under medical care Defect in medicinal product Food poisoning or infectious disease Neglect or fault of another Abortion/attempted abortion Newborn child whose body is found Cot death - SIDS Suffocation or overlaying Death of foster child Death in legal custody - prison, police custody Drowning Fire, explosion, burns or scalds ```
43
Features of referred deaths under medical care
``` Clinically unexplained Unexpected with regard to condition Attributable to diagnostic or therapeutic hazard Negligence suggested Death during anaesthesia Complication of anaesthetic or surgery ```
44
Features/investigations of deaths under medical care PF specific interest
Was patient properly examined Were all due precautions followed Were there any special risks which should have been discovered
45
Deaths PF primary interests
``` Criminal involvement - assault - RTA Unnatural - suicide - homicide - accident Medical mishap - accident - negligence ```
46
Types of medical mishap
``` Delay in treatment Breakdown in communication Inappropriate medication Equipment failure Surgical mishap - accident - unusual difficulties ```
47
Define negligence
Breach of duty of care as a result of which there is damage to another Legal duty of care owed Breach of duty by omission or commission Provable causal link between action and harm Appropriate standard of care judged against body of opinion in filed
48
Types of authority for autopsy from PF
``` 2 doctor autopsy - homicide - suspicious - RTA 1 doctor autopsy - suicide - accident - some natural disease 1 doctor or view and grant - natural View and grant preferred - family objection All can be +/- toxicology ```
49
PF further options
``` Make further inquires and precognition Involve other offices - health and safety executives - public health Close case on own authority Refer to Crown Office ```
50
Deaths PF must refer to Crown Office
``` Suspicious death Criminality involved Suicide Represents danger to public safety Medical mishap Where FAI (fatal accident inquiry) is mandatory - fatal accident at work - death in custody Where FAI have been requested by family Death of police officer Death due to fire or explosion Any other death causing concern ```
51
Features of fatal accident inquiry
``` Mandatory under 1976 act - fatal accident in course of employment - death in legal custody At discretion of LA - gives rise to public concern - hospital negligence - public transport accident Determines who, when, where, how and why death occurred Does not apportion blame ```
52
Deaths requiring coroners inquest in E&W
``` Death in prison Death in police custody Death notifiable to government department Circumstances prejudicial to public Some RTAs ```
53
Coroners inquests are adjourned for
``` Murder Manslaughter Infanticide Death by dangerous driving Suicide with abetment May resume after clinical proceedings ```
54
Coroner inquest verdicts
Died from natural causes Died from industrial disease Died from dependence on drugs / non-dependent abuse of drugs Killed themselves - whilst in the balance of mind was disturbed Died as a result of accident/misadventure Was killed lawfully Was killed unlawfully - murder, manslaughter, infanticide Died as a result of attempted/self-induced abortion Was stillborn Died from want of attention at birth Open verdict