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Flashcards in Asphyxia and drowning Deck (20)
1

  • respiration ceases
  • heart may stop beating, however may continue for a few minutes
  • agonal respiratory movment may occur

Characterisitics of apnoea stage

 

2

  • cerebral anoxia
  • hypoxia resulting from inhaled fluid
  • vagally mediated bradychardia/asystole
  • laryngeal spasm

Cause of death in drowning

 

3

Define asphyxia

A failure of the cellular uptake or use of oxygen

4

Characteristics of the convulsive stage

 

  • the Valsalva effect causes an increase in vein pressure that may result in petechial haemorrhagin in the conjunctiva, on the eyelides, in th face, behind the ears and sometimes on the trunk
  • O2 defiiency casuses a decrease in consciousness and sometimes sensory phenomena
  • muscular and incapacity
  • sphincter tone reduction
  • extension cramps in the xtremities

5

never suicide!

  • stasis, cyanosis, petechiae, bleeding in soft tissue
  • fractures on hyoid bone and/or cartilago thyroidea
  • skin abrasions, contusions, nail marks

Examination results from strangulation without tools

 

6

Findings with drowning

  • typical findings
    • adipocere
    • lungs enlarged by air and oedema fluid
    • shrivelled skin on hands and feet
  • external injuries from bottom, animals, boats, etc
  • diatoms

7

  • CO2-retention results in air hunger/panic
  • sympathetic ncrease causes violent, fast respiratory movement, increased pulse and blood pressure
  • O2-deficiendy results in cyanosis

Characteristics of the dyspnae stage

8

Characteristics of the dyspnae stage

  • CO2-retention results in air hunger/panic
  • sympathetic ncrease causes violent, fast respiratory movement, increased pulse and blood pressure
  • O2-deficiendy results in cyanosis

9

Examination results from strangulation without tools

 

never suicide!

  • stasis, cyanosis, petechiae, bleeding in soft tissue
  • fractures on hyoid bone and/or cartilago thyroidea
  • skin abrasions, contusions, nail marks

10

  • central respiratory regulation - hit by lighning
  • ventilation - pneumonia, pulmonary oedema
  • circulation - circulatory relapse, anaemia
  • gas exchange in periphery - co-intoxication
  • intracellular use of oxygen - cyanide poisoning, hydrogen sulphide poisoning

"Physiologic"/internal causes of asphyxia

11

"Physiologic"/internal causes of asphyxia

  • central respiratory regulation - hit by lighning
  • ventilation - pneumonia, pulmonary oedema
  • circulation - circulatory relapse, anaemia
  • gas exchange in periphery - co-intoxication
  • intracellular use of oxygen - cyanide poisoning, hydrogen sulphide poisoning

12

Characterisitics of apnoea stage

 

  • respiration ceases
  • heart may stop beating, however may continue for a few minutes
  • agonal resiratory movment may occur

13

  • the Valsalva effect causes an increase in vein pressure that may result in petechial haemorrhagin in the conjunctiva, on the eyelides, in th face, behind the ears and sometimes on the trunk
  • O2 defiiency casuses a decrease in consciousness and sometimes sensory phenomena
  • muscular and incapacity
  • sphincter tone reduction
  • extension cramps in the xtremities

Characteristics of the convulsive stage

 

14

Cause of death in drowning

 

  • cerebral anoxia
  • hypoxia resulting from inhaled fluid
  • vagally mediated bradychardia/asystole
  • laryngeal spasm

15

Name the three stages of mechanical asphyxia

  • dyspnea stage
  • convulsive stage
  • apnoea stage

16

  • lack of oxygen in surroundings
  • occlusion of nose and mouth
  • occlusion of throat or lower airways
  • mechanical asphyxia (strangulation, hanging)
  • positional asphyxia

Name external causes of asphyxia

17

  • dyspnea stage
  • convulsive stage
  • apnoea stage

Name the three stages of mechanical asphyxia

18

  • typical findings
    • adipocere
    • lungs enlarged by air and oedema fluid
    • shrivelled skin on hands and feet
    • external injuries from bottom, animals, boats, etc
    • diatoms

Findings with drowning

19

A failure of the cellular uptake or use of oxygen

Define asphyxia

20

Name external causes of asphyxia

  • lack of oxygen in surroundings
  • occlusion of nose and mouth
  • occlusion of throat or lower airways
  • mechanical asphyxia (strangulation, hanging)
  • positional asphyxia