Asphyxia: Difference between revisions
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Compressive asphyxia (also called chest compression) is mechanically limiting expansion of the lungs by compressing the torso, preventing breathing. "[[Traumatic asphyxia]]" or "crush asphyxia" usually refers to compressive asphyxia resulting from being crushed or pinned under a large weight or force, or in a [[Crowd collapses and crushes|crowd crush]].<ref>{{Cite news |title=Why the Mount Meron Disaster Happened, and How to Prevent Stampedes? Scientists Explain | vauthors = Ronel A |newspaper=Haaretz |date=2 May 2021 |url= https://www.haaretz.com/israel-news/.premium-how-stampedes-like-the-mount-meron-tragedy-can-be-prevented-1.9766997 |quote=likely to die from what is called traumatic asphyxia – strong pressure on the chest}}</ref> An example of traumatic asphyxia is a person who [[Jack (mechanical)|jacks]] up a car to work on it from below, and is crushed by the vehicle when the jack fails.<ref name=dimaio/> Constrictor snakes such as [[boa constrictor]]s kill through slow compressive asphyxia, tightening their coils every time the prey breathes out rather than squeezing forcefully. In cases of an adult co-sleeping with an infant ("overlay"), the heavy sleeping adult may move on top of the infant, causing compression asphyxia. |
Compressive asphyxia (also called chest compression) is mechanically limiting expansion of the lungs by compressing the torso, preventing breathing. "[[Traumatic asphyxia]]" or "crush asphyxia" usually refers to compressive asphyxia resulting from being crushed or pinned under a large weight or force, or in a [[Crowd collapses and crushes|crowd crush]].<ref>{{Cite news |title=Why the Mount Meron Disaster Happened, and How to Prevent Stampedes? Scientists Explain | vauthors = Ronel A |newspaper=Haaretz |date=2 May 2021 |url= https://www.haaretz.com/israel-news/.premium-how-stampedes-like-the-mount-meron-tragedy-can-be-prevented-1.9766997 |quote=likely to die from what is called traumatic asphyxia – strong pressure on the chest}}</ref> An example of traumatic asphyxia is a person who [[Jack (mechanical)|jacks]] up a car to work on it from below, and is crushed by the vehicle when the jack fails.<ref name=dimaio/> Constrictor snakes such as [[boa constrictor]]s kill through slow compressive asphyxia, tightening their coils every time the prey breathes out rather than squeezing forcefully. In cases of an adult co-sleeping with an infant ("overlay"), the heavy sleeping adult may move on top of the infant, causing compression asphyxia. |
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In fatal crowd disasters, compressive asphyxia from being crushed against the crowd causes all or nearly all deaths, rather than [[blunt trauma]] from trampling. This is what occurred at the [[1971 Ibrox disaster|Ibrox disaster]] in 1971, where 66 [[Rangers F.C.|Rangers]] fans died; the [[1979 The Who concert disaster]] where 11 died; the [[Luzhniki disaster]] in 1982, when 66 [[FC Spartak Moscow]] fans died; the [[Hillsborough disaster]] in 1989, where 96 [[Liverpool F.C.|Liverpool]] fans were crushed to death in an overcrowded terrace, 95 of the 96 from compressive asphyxia, 93 dying directly from it and 2 others from related complications; and the [[Astroworld Festival crowd crush]] in 2021, where 10 died. More recently on the 29th of October 2022, 156 people were killed and over 152 were injured in Itaewon, South Korea on an evening of Halloween celebrations. <ref>{{cite news|url=https://www.bbc.com/news/uk-26765007 | title=Hillsborough inquests: The 96 who died | work=BBC News | date=26 April 2016 | access-date= February 22, 2018 }}</ref><ref>{{Cite news|url=https://abc13.com/astroworld-tragedy-festival-deaths-travis-scott-concert-victims-cause-of/11348897/|title=Astroworld Festival victims' deaths ruled as accident due to asphyxiation, medical examiner finds|date=December 16, 2021|access-date=December 16, 2021|publisher=[[KTRK-TV]] |
In fatal crowd disasters, compressive asphyxia from being crushed against the crowd causes all or nearly all deaths, rather than [[blunt trauma]] from trampling. This is what occurred at the [[1971 Ibrox disaster|Ibrox disaster]] in 1971, where 66 [[Rangers F.C.|Rangers]] fans died; the [[1979 The Who concert disaster]] where 11 died; the [[Luzhniki disaster]] in 1982, when 66 [[FC Spartak Moscow]] fans died; the [[Hillsborough disaster]] in 1989, where 96 [[Liverpool F.C.|Liverpool]] fans were crushed to death in an overcrowded terrace, 95 of the 96 from compressive asphyxia, 93 dying directly from it and 2 others from related complications; and the [[Astroworld Festival crowd crush]] in 2021, where 10 died. More recently on the 29th of October 2022, 156 people were killed and over 152 were injured in Itaewon, South Korea on an evening of Halloween celebrations. <ref>{{cite news|url=https://www.bbc.com/news/uk-26765007 | title=Hillsborough inquests: The 96 who died | work=BBC News | date=26 April 2016 | access-date= February 22, 2018 }}</ref><ref>{{Cite news|url=https://abc13.com/astroworld-tragedy-festival-deaths-travis-scott-concert-victims-cause-of/11348897/|title=Astroworld Festival victims' deaths ruled as accident due to asphyxiation, medical examiner finds|date=December 16, 2021|access-date=December 16, 2021|publisher=[[KTRK-TV]]}}</ref> |
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In confined spaces, people are forced to push against each other; evidence from bent steel railings in several fatal crowd accidents has shown horizontal forces over 4500 N (equivalent to a weight of approximately 450 kg or 1000 lbs). In cases where people have stacked up on each other in a human pile, it has been estimated that those at the bottom are subjected to around 380 kg (840 lbs) of compressive weight.<ref>{{cite web| vauthors = Fruin J |url= http://www.crowddynamics.com/Main/Fruin%20-%20causes.htm |title=The Causes and Prevention of Crowd Disasters |website=crowddynamics.com |access-date=March 3, 2006 |url-status=dead |archive-url=https://web.archive.org/web/20060221133845/http://www.crowddynamics.com/Main/Fruin%20-%20causes.htm |archive-date=February 21, 2006 }}</ref> |
In confined spaces, people are forced to push against each other; evidence from bent steel railings in several fatal crowd accidents has shown horizontal forces over 4500 N (equivalent to a weight of approximately 450 kg or 1000 lbs). In cases where people have stacked up on each other in a human pile, it has been estimated that those at the bottom are subjected to around 380 kg (840 lbs) of compressive weight.<ref>{{cite web| vauthors = Fruin J |url= http://www.crowddynamics.com/Main/Fruin%20-%20causes.htm |title=The Causes and Prevention of Crowd Disasters |website=crowddynamics.com |access-date=March 3, 2006 |url-status=dead |archive-url=https://web.archive.org/web/20060221133845/http://www.crowddynamics.com/Main/Fruin%20-%20causes.htm |archive-date=February 21, 2006 }}</ref> |
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{{Main|Perinatal asphyxia}} |
{{Main|Perinatal asphyxia}} |
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Perinatal asphyxia is the medical condition resulting from deprivation of [[oxygen]] ([[Hypoxia (medical)|hypoxia]]) to a newborn infant long enough to cause apparent harm. It results most commonly from a drop in maternal [[blood pressure]] or interference during [[childbirth|delivery]] with blood flow to the infant's [[brain]]. This can occur as a result of inadequate [[circulatory system|circulation]] or [[perfusion]], impaired respiratory effort, or inadequate [[Ventilation (physiology)|ventilation]].<ref name="Davis" /> There has long been a scientific debate over whether [[Neonatal resuscitation|newborn infants with asphyxia should be resuscitated]] with 100% oxygen or normal air.<ref name="Davis">{{cite journal | vauthors = Davis PG, Tan A, O'Donnell CP, Schulze A | title = Resuscitation of newborn infants with 100% oxygen or air: a systematic review and meta-analysis | journal = Lancet | volume = 364 | issue = 9442 | pages = 1329–33 | year = 2004 | pmid = 15474135 | doi = 10.1016/S0140-6736(04)17189-4 | s2cid = 24825982 }}</ref> It has been demonstrated that high concentrations of oxygen lead to generation of oxygen [[free radicals]], which have a role in [[reperfusion injury]] after asphyxia.<ref>{{cite journal | vauthors = Kutzsche S, Ilves P, Kirkeby OJ, Saugstad OD | title = Hydrogen peroxide production in leukocytes during cerebral hypoxia and reoxygenation with 100% or 21% oxygen in newborn piglets | journal = Pediatric Research | volume = 49 | issue = 6 | pages = 834–42 | date = June 2001 | pmid = 11385146 | doi = 10.1203/00006450-200106000-00020 | doi-access = free | author-link4 = Ola Didrik Saugstad }}</ref> Research by [[Ola Didrik Saugstad]] and others led to new international guidelines on newborn resuscitation in 2010, recommending the use of normal air instead of 100% oxygen.<ref>ILCOR [[Neonatal resuscitation]] Guidelines 2010</ref><ref>{{cite web | url = http://www.norway.gr/News_and_events/Events/Older-articles/Norwegian-paediatrician-honoured-by-University-of-Athens-/ | title = Norwegian paediatrician honoured by University of Athens | archive-url = https://web.archive.org/web/20160304101405if_/http://www.norway.gr/News_and_events/Events/Older-articles/Norwegian-paediatrician-honoured-by-University-of-Athens-/#.Vtlf8C2l1qs | archive-date = |
Perinatal asphyxia is the medical condition resulting from deprivation of [[oxygen]] ([[Hypoxia (medical)|hypoxia]]) to a newborn infant long enough to cause apparent harm. It results most commonly from a drop in maternal [[blood pressure]] or interference during [[childbirth|delivery]] with blood flow to the infant's [[brain]]. This can occur as a result of inadequate [[circulatory system|circulation]] or [[perfusion]], impaired respiratory effort, or inadequate [[Ventilation (physiology)|ventilation]].<ref name="Davis" /> There has long been a scientific debate over whether [[Neonatal resuscitation|newborn infants with asphyxia should be resuscitated]] with 100% oxygen or normal air.<ref name="Davis">{{cite journal | vauthors = Davis PG, Tan A, O'Donnell CP, Schulze A | title = Resuscitation of newborn infants with 100% oxygen or air: a systematic review and meta-analysis | journal = Lancet | volume = 364 | issue = 9442 | pages = 1329–33 | year = 2004 | pmid = 15474135 | doi = 10.1016/S0140-6736(04)17189-4 | s2cid = 24825982 }}</ref> It has been demonstrated that high concentrations of oxygen lead to generation of oxygen [[free radicals]], which have a role in [[reperfusion injury]] after asphyxia.<ref>{{cite journal | vauthors = Kutzsche S, Ilves P, Kirkeby OJ, Saugstad OD | title = Hydrogen peroxide production in leukocytes during cerebral hypoxia and reoxygenation with 100% or 21% oxygen in newborn piglets | journal = Pediatric Research | volume = 49 | issue = 6 | pages = 834–42 | date = June 2001 | pmid = 11385146 | doi = 10.1203/00006450-200106000-00020 | doi-access = free | author-link4 = Ola Didrik Saugstad }}</ref> Research by [[Ola Didrik Saugstad]] and others led to new international guidelines on newborn resuscitation in 2010, recommending the use of normal air instead of 100% oxygen.<ref>ILCOR [[Neonatal resuscitation]] Guidelines 2010</ref><ref>{{cite web | url = http://www.norway.gr/News_and_events/Events/Older-articles/Norwegian-paediatrician-honoured-by-University-of-Athens-/ | title = Norwegian paediatrician honoured by University of Athens | archive-url = https://web.archive.org/web/20160304101405if_/http://www.norway.gr/News_and_events/Events/Older-articles/Norwegian-paediatrician-honoured-by-University-of-Athens-/#.Vtlf8C2l1qs | archive-date = 4 March 2016 | work = Royal Norwegian Embassy in Athens }}</ref> |
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=== Mechanical asphyxia === |
=== Mechanical asphyxia === |
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* {{cite book | vauthors = Kay-Shuttleworth JP |author-link=James Phillips Kay-Shuttleworth |title=The Physiology, Pathology, and Treatment of Asphyxia |publisher=Longman, Rees, Orme, Brown, Green & Longman |year=1834 |url=https://archive.org/details/b21306588 }} |
* {{cite book | vauthors = Kay-Shuttleworth JP |author-link=James Phillips Kay-Shuttleworth |title=The Physiology, Pathology, and Treatment of Asphyxia |publisher=Longman, Rees, Orme, Brown, Green & Longman |year=1834 |url=https://archive.org/details/b21306588 }} |
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* {{cite journal | vauthors = Elsner R | title = Perspectives in diving and asphyxia | journal = Undersea Biomedical Research | volume = 16 | issue = 5 | pages = 339–44 | date = September 1989 | pmid = 2678664 | url = http://archive.rubicon-foundation.org/2500 | access-date = 2008-07-04 | url-status = |
* {{cite journal | vauthors = Elsner R | title = Perspectives in diving and asphyxia | journal = Undersea Biomedical Research | volume = 16 | issue = 5 | pages = 339–44 | date = September 1989 | pmid = 2678664 | url = http://archive.rubicon-foundation.org/2500 | access-date = 2008-07-04 | url-status = usurped | archive-url = https://web.archive.org/web/20100808091233/http://archive.rubicon-foundation.org/2500 | archive-date = 2010-08-08 }} |
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{{refend}} |
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Revision as of 00:49, 2 November 2022
Asphyxia | |
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Other names | Asphyxiation |
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The neck contains several vulnerable targets for compression, including the carotid arteries. | |
Specialty | Critical care medicine |
Complications | Coma |
Frequency | 9.8 million unintentional worldwide (2015)[1] |
Deaths | 35,600 worldwide (2015)[2] |
Asphyxia or asphyxiation is a condition of deficient supply of oxygen to the body which arises from abnormal breathing. Asphyxia causes generalized hypoxia, which affects primarily the tissues and organs. There are many circumstances that can induce asphyxia, all of which are characterized by the inability of a person to acquire sufficient oxygen through breathing for an extended period of time. Asphyxia can cause coma or death.
In 2015, about 9.8 million cases of unintentional suffocation occurred which resulted in 35,600 deaths.[1][2] The word asphyxia is from Ancient Greek
Causes
Situations that can cause asphyxia include but are not limited to: airway obstruction, the constriction or obstruction of airways, such as from asthma, laryngospasm, or simple blockage from the presence of foreign materials; from being in environments where oxygen is not readily accessible: such as underwater, in a low oxygen atmosphere, or in a vacuum; environments where sufficiently oxygenated air is present, but cannot be adequately breathed because of air contamination such as excessive smoke.
Other causes of oxygen deficiency include but are not limited to:
- Acute respiratory distress syndrome
- Carbon monoxide inhalation, such as that from a car exhaust and the smoke's emission from a lit cigarette: carbon monoxide has a higher affinity than oxygen to the hemoglobin in the blood's red blood corpuscles, bonding with it tenaciously, and, in the process, displacing oxygen and preventing the blood from transporting oxygen around the body
- Contact with certain chemicals, including pulmonary agents (such as phosgene) and blood agents (such as hydrogen cyanide)
- Drowning
- Drug overdose
- Exposure to extreme low pressure or vacuum from spacesuit damage (see space exposure)
- Hanging, whether suspension or short drop hanging
- Self-induced hypocapnia by hyperventilation, as in shallow water or deep water blackout and the choking game
- Inert gas asphyxiation
- Congenital central hypoventilation syndrome, or primary alveolar hypoventilation, a disorder of the autonomic nervous system in which a patient must consciously breathe; although it is often said that persons with this disease will die if they fall asleep, this is not usually the case
- Respiratory diseases
- Sleep apnea
- A seizure which stops breathing activity
- Strangling
- Breaking the wind pipe
- Prolonged exposure to chlorine gas
Smothering
Smothering is a mechanical obstruction of the flow of air from the environment into the mouth and/or nostrils, for instance, by covering the mouth and nose with a hand, pillow, or a plastic bag.[4] Smothering can be either partial or complete, where partial indicates that the person being smothered is able to inhale some air, although less than required. In a normal situation, smothering requires at least partial obstruction of both the nasal cavities and the mouth to lead to asphyxia. Smothering with the hands or chest is used in some combat sports to distract the opponent, and create openings for transitions, as the opponent is forced to react to the smothering.
In some cases, when performing certain routines, smothering is combined with simultaneous compressive asphyxia. One example is overlay, in which an adult accidentally rolls over onto an infant during co-sleeping, an accident that often goes unnoticed and is mistakenly thought to be sudden infant death syndrome.[4] Other accidents involving a similar mechanism are cave-ins or when an individual is buried in sand or grain.
In homicidal cases, the term burking is often ascribed to a killing method that involves simultaneous smothering and compression of the torso.[5] The term "burking" comes from the method William Burke and William Hare used to kill their victims during the West Port murders. They killed the usually intoxicated victims by sitting on their chests and suffocating them by putting a hand over their nose and mouth, while using the other hand to push the victim's jaw up. The corpses had no visible injuries, and were supplied to medical schools for money.[6]
Compressive asphyxia
Compressive asphyxia (also called chest compression) is mechanically limiting expansion of the lungs by compressing the torso, preventing breathing. "Traumatic asphyxia" or "crush asphyxia" usually refers to compressive asphyxia resulting from being crushed or pinned under a large weight or force, or in a crowd crush.[7] An example of traumatic asphyxia is a person who jacks up a car to work on it from below, and is crushed by the vehicle when the jack fails.[5] Constrictor snakes such as boa constrictors kill through slow compressive asphyxia, tightening their coils every time the prey breathes out rather than squeezing forcefully. In cases of an adult co-sleeping with an infant ("overlay"), the heavy sleeping adult may move on top of the infant, causing compression asphyxia.
In fatal crowd disasters, compressive asphyxia from being crushed against the crowd causes all or nearly all deaths, rather than blunt trauma from trampling. This is what occurred at the Ibrox disaster in 1971, where 66 Rangers fans died; the 1979 The Who concert disaster where 11 died; the Luzhniki disaster in 1982, when 66 FC Spartak Moscow fans died; the Hillsborough disaster in 1989, where 96 Liverpool fans were crushed to death in an overcrowded terrace, 95 of the 96 from compressive asphyxia, 93 dying directly from it and 2 others from related complications; and the Astroworld Festival crowd crush in 2021, where 10 died. More recently on the 29th of October 2022, 156 people were killed and over 152 were injured in Itaewon, South Korea on an evening of Halloween celebrations. [8][9]
In confined spaces, people are forced to push against each other; evidence from bent steel railings in several fatal crowd accidents has shown horizontal forces over 4500 N (equivalent to a weight of approximately 450 kg or 1000 lbs). In cases where people have stacked up on each other in a human pile, it has been estimated that those at the bottom are subjected to around 380 kg (840 lbs) of compressive weight.[10]
"Positional" or "restraint" asphyxia is when a person is restrained and left alone prone, such as in a police vehicle, and is unable to reposition themself in order to breathe. The death can be in the vehicle, or following loss of consciousness to be followed by death while in a coma, having presented with anoxic brain damage. The asphyxia can be caused by facial compression, neck compression, or chest compression. This occurs mostly during restraint and handcuffing situations by law enforcement, including psychiatric incidents. The weight of the restraint(s) doing the compression may contribute to what is attributed to positional asphyxia. Therefore, passive deaths following custody restraint that are presumed to be the result of positional asphyxia may actually be examples of asphyxia occurring during the restraint process.
Chest compression is a technique used in various grappling combat sports, where it is sometimes called wringing, either to tire the opponent or as complementary or distractive moves in combination with pinning holds,[11] or sometimes even as submission holds. Examples of chest compression include the knee-on-stomach position; or techniques such as leg scissors (also referred to as body scissors and in budō referred to as do-jime;[12]
Pressing is a form of torture or execution using compressive asphyxia.
Perinatal asphyxia
Perinatal asphyxia is the medical condition resulting from deprivation of oxygen (hypoxia) to a newborn infant long enough to cause apparent harm. It results most commonly from a drop in maternal blood pressure or interference during delivery with blood flow to the infant's brain. This can occur as a result of inadequate circulation or perfusion, impaired respiratory effort, or inadequate ventilation.[15] There has long been a scientific debate over whether newborn infants with asphyxia should be resuscitated with 100% oxygen or normal air.[15] It has been demonstrated that high concentrations of oxygen lead to generation of oxygen free radicals, which have a role in reperfusion injury after asphyxia.[16] Research by Ola Didrik Saugstad and others led to new international guidelines on newborn resuscitation in 2010, recommending the use of normal air instead of 100% oxygen.[17][18]
Mechanical asphyxia
Classifications of different forms of asphyxia vary among literature, with differences in defining the concept of mechanical asphyxia being the most obvious.[19]
In DiMaio and DiMaio's 2001 textbook on forensic pathology, mechanical asphyxia is caused by pressure from outside the body restricting respiration.[19] Similar narrow definitions of mechanical asphyxia have occurred in Azmak's 2006 literature review of asphyxial deaths and Oehmichen and Auer's 2005 book on forensic neuropathology.[19] According to DiMaio and DiMaio, mechanical asphyxia encompasses positional asphyxia, traumatic asphyxia, and "human pile" deaths.[19]
In Shkrum and Ramsay's 2007 textbook on forensic pathology, mechanical asphyxia occurs when any mechanical means cause interference with the exchange of oxygen and carbon dioxide in the body.[19] Similar broad definitions of mechanical asphyxia have occurred in Saukko and Knight's 2004 book on asphyxia, and Dolinak and Matshes' 2005 book on forensic pathology.[19] According to Shkrum and Ramsay, mechanical asphyxia encompasses smothering, choking, positional asphyxia, traumatic asphyxia, wedging, strangulation and drowning.[19]
Sauvageau and Boghossian propose in 2010 that mechanical asphyxia should be officially defined as caused by "restriction of respiratory movements, either by the position of the body or by external chest compression", thus encompassing only positional asphyxia and traumatic asphyxia.[19]
First aid
If there are symptoms of mechanical asphyxia,[20] it is necessary to call an Emergency Medical Services.[21] In some countries, such as the US, there may also be self-acting groups of voluntary first responders who have been trained in first aid.[22][23] In case of mechanical asphyxia, first aid can be provided on your own. In such a situation, you need to do the following:
- Stand behind the affected person and wrap your arms around him/her.
- Push inwards and upwards under the ribs with a sudden movement by your second hand.
- If the performed actions were not effective, repeat them until you free respiratory tract of the affected person from a foreign body.
See also
- Asphyxiant gas – Nontoxic or minimally toxic gas which can displace oxygen in breathing air
- Erotic asphyxiation – Intentional restriction of oxygen to the brain for sexual arousal
- Hypercapnia – Abnormally high tissue carbon dioxide levels
- Respiratory acidosis – Decrease in blood pH due to insufficient breathing
References
- ^ a b GBD 2015 Disease and Injury Incidence and Prevalence Collaborators (October 2016). "Global, regional, and national incidence, prevalence, and years lived with disability for 310 diseases and injuries, 1990–2015: a systematic analysis for the Global Burden of Disease Study 2015". Lancet. 388 (10053): 1545–1602. doi:10.1016/S0140-6736(16)31678-6. PMC 5055577. PMID 27733282.
{{cite journal}}
:|author=
has generic name (help)CS1 maint: numeric names: authors list (link) - ^ a b GBD 2015 Disease and Injury Incidence and Prevalence Collaborators (October 2016). "Global, regional, and national life expectancy, all-cause mortality, and cause-specific mortality for 249 causes of death, 1980–2015: a systematic analysis for the Global Burden of Disease Study 2015". Lancet. 388 (10053): 1459–1544. doi:10.1016/s0140-6736(16)31012-1. PMC 5388903. PMID 27733281.
{{cite journal}}
:|author=
has generic name (help)CS1 maint: numeric names: authors list (link) - ^ "Asphyxia Origin". Online Etymology Dictionary. Retrieved 19 July 2015.
- ^ a b Ferris JA. "Asphyxia". pathology.ubc.ca. Archived from the original (DOC) on 14 June 2006. Retrieved 1 March 2006.
- ^ a b DiMaio V, DiMaio D (2001). "Asphyxia". Forensic Pathology (Second ed.). Boca Raton: CRC Press. ISBN 978-0-8493-0072-1. Archived from the original on 13 May 2016.
Deaths Occurring Following the Application of Choke or Carotid Holds
- ^ "Burking Law & Legal Definition". definitions.uslegal.com. Retrieved 7 August 2015.
- ^ Ronel A (2 May 2021). "Why the Mount Meron Disaster Happened, and How to Prevent Stampedes? Scientists Explain". Haaretz.
likely to die from what is called traumatic asphyxia – strong pressure on the chest
- ^ "Hillsborough inquests: The 96 who died". BBC News. 26 April 2016. Retrieved 22 February 2018.
- ^ "Astroworld Festival victims' deaths ruled as accident due to asphyxiation, medical examiner finds". KTRK-TV. 16 December 2021. Retrieved 16 December 2021.
- ^ Fruin J. "The Causes and Prevention of Crowd Disasters". crowddynamics.com. Archived from the original on 21 February 2006. Retrieved 3 March 2006.
- ^ Ohlenkamp N. "Principles of Judo Choking Techniques". judoinfo.com. Retrieved 3 March 2006.
- ^ "Classification of Waza Names". The Kodokan Judo Institute. Archived from the original on 15 April 2012. Retrieved 4 March 2006.
Do-jime is a prohibited technique in Judo nd is considered a 'slight infringement' according to IJF rules, Section 27: Prohibited acts and penalties, article 21. It should not be confused with do-osae, which is a colloquial term for the guard position
- ^ "IJF Referee Rules". International Judo Federation. Archived from the original on 15 April 2012. Retrieved 6 March 2006.
- ^ Lewis B. "Katsuhiko Kashiwazaki – Shimewaza (Book Review)". www.bjj.org. Archived from the original on 15 February 2006. Retrieved 4 March 2006.
- ^ a b Davis PG, Tan A, O'Donnell CP, Schulze A (2004). "Resuscitation of newborn infants with 100% oxygen or air: a systematic review and meta-analysis". Lancet. 364 (9442): 1329–33. doi:10.1016/S0140-6736(04)17189-4. PMID 15474135. S2CID 24825982.
- ^ Kutzsche S, Ilves P, Kirkeby OJ, Saugstad OD (June 2001). "Hydrogen peroxide production in leukocytes during cerebral hypoxia and reoxygenation with 100% or 21% oxygen in newborn piglets". Pediatric Research. 49 (6): 834–42. doi:10.1203/00006450-200106000-00020. PMID 11385146.
- ^ ILCOR Neonatal resuscitation Guidelines 2010
- ^ "Norwegian paediatrician honoured by University of Athens". Royal Norwegian Embassy in Athens. Archived from the original on 4 March 2016.
- ^ a b c d e f g h Sauvageau A, Boghossian E (September 2010). "Classification of asphyxia: the need for standardization". Journal of Forensic Sciences. 55 (5): 1259–67. doi:10.1111/j.1556-4029.2010.01459.x. PMID 20561144. S2CID 25283094.
- ^ "Causes of asphyxiation". healthline.com. June 2021. Retrieved 24 May 2022.
- ^ "WHAT IS EMS?". ems.gov. Retrieved 24 May 2022.
- ^ "American Academy of CPR & First Aid, Inc". onlinecprcertification.net. Retrieved 24 May 2022.
- ^ "Indian River County Volunteer Ambulance Squad Inc". ridevas.org. Retrieved 24 May 2022.
Further reading
- Kay-Shuttleworth JP (1834). The Physiology, Pathology, and Treatment of Asphyxia. Longman, Rees, Orme, Brown, Green & Longman.
- Elsner R (September 1989). "Perspectives in diving and asphyxia". Undersea Biomedical Research. 16 (5): 339–44. PMID 2678664. Archived from the original on 8 August 2010. Retrieved 4 July 2008.
{{cite journal}}
: CS1 maint: unfit URL (link)
External links
![](https://upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/40px-Wiktionary-logo-en-v2.svg.png)
Media related to Asphyxia at Wikimedia Commons
- Cross-side to chest compression choke