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Topic: Histotoxic hypoxia

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Hypoxia medical

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	Hypoxia (medical) Encyclopedia Article @ Wearily.net (Site not responding. Last check: 2007-09-18)
		Hypoxia is a pathological condition in which the body as a whole (generalised hypoxia) or region of the body (tissue hypoxia) is deprived of adequate oxygen supply.
		Severe hypoxia induces a blue discolouration of the skin, called cyanosis (haemoglobin is blue when it is not bound to oxygen (deoxyhaemoglobin), as opposed to the rich red colour that it has when bound to oxygen (oxyhaemoglobin)).
		Histotoxic hypoxia in which quantity of oxygen reaching the cells is normal, but the cells are unable to effectively use the oxygen.
	www.wearily.net /encyclopedia/Hypoxia_(medical) (973 words)

	Hypoxia
		Hypoxia may be caused by climbing to an altitude where the body is susceptible to a loss of arterial oxygen below that required by the body.
		Hypoxia symptoms are diverse, varying from person to person, depending on variables such as absolute altitude, rate of ascent, duration at altitude, ambient temperature and physical activity.
		Hypoxia may be prevented with the use of supplemental oxygen at altitudes specified by regulation, or by flying pressurized airplanes.
	www.mountainflying.com /hypoxia.htm (639 words)

	Hypoxia (Site not responding. Last check: 2007-09-18)
		Hypoxia is a state of oxygen deficiency in the body which is sufficient to cause an impairment of function.
		[This is the hypoxia that is a hazard to aviators.]
		Histotoxic Hypoxia is defined as the inability of the tissues to use oxygen.
	www.batnet.com /mfwright/hypoxia.html (276 words)

	Hypoxia by Alex Paterson
		Hypoxia is defined as a condition of the body in which the tissues are starved of oxygen.
		Hypoxia is a condition of the body in which the tissues are starved of oxygen.
		In histotoxic hypoxia the cells of the body are unable to use the oxygen, although the amount in the blood may be normal and under normal tension.
	www.vision.net.au /~apaterson/science/hypoxia.htm (1343 words)

	Post 22913 Forums PLAB USMLE (Site not responding. Last check: 2007-09-18)
		Examples of cytotoxic hypoxia include poisoning by cyanide, which combines with the cytochrome chain and prevents oxygen being used, and deficiencies of some of the B group of vitamins, which are involved in the chemical pathways used by respiring cells.
		The increase in ventilation produced by hypoxia and hypercapnia (a raised partial pressure of carbon dioxide) acting together, is greater than the sum of the increases produced by the hypoxia and the hypercapnia acting on their own.
		When the hypoxia is severe enough to increase the ventilation, the partial pressure of carbon dioxide in the alveolar air and arterial blood does fall and a low partial pressure of carbon dioxide (hypocapnia) reduces the ventilation; the combination of hypoxia stimulating the ventilation and hypocapnia slowing it, increases the ventilation only slightly.
	www.aipge.com /postp22913.html (4399 words)

	Elliott Aviation - My Aircraft (Site not responding. Last check: 2007-09-18)
		Hypoxic hypoxia occurs when there is a lack of sufficient oxygen in the breathing air, as when flying in an unpressurized cabin or when flying at altitude in a jet aircraft with a cabin pressurized to an altitude above 5,000 feet.
		Histotoxic hypoxia is a disruption of cellular respiration due to toxins such as alcohol and narcotics, even antihistamines, analgesics and some vitamins.
		The degree to which hypoxia affects your body is determined by several factors, including the altitude at which you are acclimated, the rate of ascent, and the duration of exposure (the symptoms of hypoxia are cumulative).
	www.elliottaviation.com /wavelink/2001q2/wavart130.asp (1480 words)

	Hypoxia (via CobWeb/3.1 planetlab1.netlab.uky.edu) (Site not responding. Last check: 2007-09-18)
		Hypoxia is defined as an inadequate supply of oxygen for proper cell function.
		This form of hypoxia is cause by reduced oxygen in the atmosphere or an inadequate gas exchange in the lungs.
		This disorder is caused by a reduction in the oxygen-carrying capacity of the blood, such as with sickle cell anemia and carbon monoxide poisoning.
	www.rashaduniversity.com.cob-web.org:8888 /hypoxia.html (121 words)

	Rapid Recovery Hyperbarics : Research References (Site not responding. Last check: 2007-09-18)
		Hypoxia is caused by the reduction in partial pressure of oxygen, inadequate oxygen transport, or the inability of the tissues to use oxygen.
		Pemic Hypoxia is defined as a reduction in the oxygen carrying capacity of the blood.
		Stagnant Hypoxia is an oxygen deficiency due to poor circulation of the blood or poor blood flow.
	www.hbot4u.com /darkages15.html (276 words)

	Biochemistry- Hypoxia (via CobWeb/3.1 planetlab1.netlab.uky.edu) (Site not responding. Last check: 2007-09-18)
		Hypoxia is a condition when the tissues are deprived of oxygen.
		Stagnant hypoxia is when there is a low level oxygen to the tissues that is caused by reduced blood flow.
		Hypoxia inducing factor is a specific protein involved in maintaining oxygen homeostasis and regulates hypoxia inducible genes that include human erythropoietin (EPO) gene [1].
	www.cs.stedwards.edu.cob-web.org:8888 /chem/Chemistry/CHEM43/CHEM43/hypoxia/structure.htm (377 words)

	Hypoxia
		Hypoxic hypoxia occurs when insufficient oxygen is in the air or when decreasing atmospheric pressures prevent the diffusion of oxygen from the lungs into the bloodstream.
		Hypemic, or anemic, hypoxia is caused by reduction in the oxygen-carrying capacity of the blood.
		Therefore, during hypoxia, the ATP/ADP ratio decreases and there is a rapid decline in the level of all high energy compounds.
	www.portfolio.mvm.ed.ac.uk /studentwebs/session6/6/Hypoxia.html (696 words)

	Hypoxia - what is hypoxia
		Hypoxia hypemic complication resuscitation hypoxia hypoxia bone brain damagefrom hypoxia marrow changes hypoxia is the causes hypoxia lack of oxygen in tissues, see Hypoxia (medical)
		Hypoxia hypoxia effect cellular hypoxia lab values on wrists is a reduced concentration of dissolved oxygen hypoxia treatment in a water histotoxic hypoxia body leading to stress renal tissue hypoxia or even death in aquatic symptoms of hypoxia organisms.
		This is a disambiguation dementia hypoxia and seizures and cyanide and histoxic hypoxia hypoxia cause of hypoxia page, tissue hypoxia hypoxia hypoxia at birth + long term effects symptoms a list of hypoxia and tachycardia effects of hypoxia pages that otherwise might share the same title.
	www.medicalgeo.com /Med-Diseases-Ho---Hy/Hypoxia.html (266 words)

	TP 13312 - Handbook for Civil Aviation Medical Examiners (Site not responding. Last check: 2007-09-18)
		Hypoxic hypoxia is due to a decrease in the oxygen available to the body such as typically occurs with altitude.
		Stagnant hypoxia is a less common problem caused by a reduction in total cardiac output, pooling of the blood or restriction of blood flow.
		Histotoxic hypoxia refers to poisoning of the respiratory cytochrome system by chemicals such as cyanide or carbon monoxide but it can also be caused by the effects of alcohol.
	www.tc.gc.ca /CivilAviation/cam/tp13312-2/section2/hypoxia.htm (2228 words)

	FlightSafety International
		Hypoxia is defined as a lack of sufficient oxygen in the body caused by an inadequate supply of oxygen, inadequate transportation of oxygen, or inability of the body tissues to utilize oxygen.
		For training purposes, it is useful to divide hypoxia symptoms into a three-stage progression: slowing, errors, and final failure, which results in apathy and loss of consciousness.
		Factors influencing a pilot’s susceptibility to hypoxia symptoms range from physical fitness to the aircraft’s altitude and rate of ascent.
	www.flightsafety.com /hypoxia.php (539 words)

	Oxygen Transport
		The third type of hypoxia is known as anemic, in which there is a decrease in the oxygen content of the blood, but the arterial oxygen tension may be normal.
		Purists would not include histotoxic hypoxia as a fourth type, because both the arterial oxygen tension and the oxygen content of blood are normal.
		Carbon monoxide poisoning is an example of anemic hypoxia where the arterial oxygen tension remains near normal until substantial blood concentrations of carboxyhemoglobin are reached.
	www.dartmouth.edu /~rpsmith/Oxygen_Transport.html (4858 words)

	THANKS 4 SUPPORTING .US :: DOUG BROKAW - POURED OUT FOR CHRIST - Glossary (Site not responding. Last check: 2007-09-18)
		Categories of hypoxia: Hypoxic hypoxia in which arterial oxygen pressure is reduced.
		Ischemic hypoxia in which blood flow to the tissues is too low.
		Histotoxic hypoxia in which quantity of oxygen reaching the tissue is normal, but the tissue is unable to use the oxygen.
	thanks4supporting.us /brokaw/glossary.html (402 words)

	Vet Tech Physiology Lesson: Respiratory Abnormalities (Site not responding. Last check: 2007-09-18)
		It can be caused by obstruction to the respiratory passages, thichening of the membrane as a result of congestion such as in pneumonia, or a reduction of area of pulmonary membrane such as in emphesema.
		It is failure to transport adequate oxygen to the tissues, due to slow blood flow to the tissues such as in cardiac failure, or circulatory shock and localized impairment of flow (arterial spasm, embolism).
		This condition is produced if there is anemia or hemoglobin content is low or if it cannot combine with oxygen to the normal extent (as in carbon monoxide poisoning, in which CO displaces the O2, due to greater affinity for the binding site).
	www.vet.purdue.edu /depts/bms/vldl/LP_05_E.html (446 words)

	Hypoxia (medical) - Wikipedia, the free encyclopedia
		For other uses of the term "hypoxia", see hypoxia.
		Symptoms of generalized hypoxia depend on its severity and speed of onset.
		Carbon monoxide poisoning which inhibits the ability of haemoglobin to release the oxygen bound to it.
	en.wikipedia.org /wiki/Hypoxia_(medical) (817 words)

	Lobo net - G Company 140th Avn (Site not responding. Last check: 2007-09-18)
		Hypemic (or anemic) hypoxia is caused by a reduction in the capacity of the blood to carry a sufficient amount of 0
		This type of hypoxia, like hypemic hypoxia, is due to a malfunction of the circulatory system, but differs in certain respects.
		This is due to the failure of an oxygen molecule to attach to the hemoglobin molecule.
	student.santarosa.edu /~sahrens1/assign4/apartmed.html (1866 words)

	chet_colbert_intcardpha_1\|Therapeutic Medical Gases\|Audio Glossary
		hypoxia as a result of a hypermetabolic state.
		hypoxia as a result of the tissue’s inability to utilize oxygen for metabolism.
		(stagnant) hypoxia due to an impairment in the circulatory system’s ability to transport oxygen.
	wps.prenhall.com /chet_colbert_intcardpha_1/0,5136,93489-,00.html (279 words)

	eMedicine - Aerospace Medicine : Article by John Ogle, MD, MPH, FACEP (Site not responding. Last check: 2007-09-18)
		Hypoxia is insufficient tissue oxygenation and is often secondary to multiple stressors.
		Hypoxic hypoxia is a deficiency of oxygen exchange at the alveolar level and exists in those exposed to high altitudes, near-drowning victims, and in patients with conditions such as asthma, atelectasis, chronic obstructive pulmonary disease (COPD), pulmonary embolism, congenital heart defects, and pneumonia.
		Stagnant hypoxia is secondary to reduced systemic or regional circulation and appears in patients with congestive heart failure (CHF), shock, hypothermia, poor positioning/immobility, tourniquets, hyperventilation, cerebrovascular accident (CVA), and emboli.
	www.emedicine.com /emerg/topic790.htm (8165 words)

	CARBON MONOXIDE RELATED PLANE CRASH
		Hypoxia is the lack of oxygen to the tissues that can result in impairment of function.
		Despite the above hypoxia is not cut and dried at I0000ft.
		There are a number of types of hypoxia and each effect is cumulative.
	home.hiwaay.net /~langford/hypoxia.html (1505 words)

	Tech Tips (Site not responding. Last check: 2007-09-18)
		Hypoxic hypoxia is the most common and is caused by decreased oxygen in air or the inability to diffuse the oxygen across the lungs.
		Hypemic hypoxia is caused by the reduction of the oxygen carrying capacity of the blood.
		HYPOXIA is the lack of oxygen in all of the functioning parts of the body.
	www.l-19bowwow.com /ARCHIVEs/members/aeromed/hypoxia.htm (918 words)

	HYPOXIA
		Hypoxic hypoxia is also known as hypobaric hypoxia in aviation terms, and is the most serious single physiological hazard during flight at altitude.
		Hypoxia induces sympathetic activity and via a baroreceptor reflex, stimulates the loss of sodium and water in the urine.
		In conditions of moderate and severe hypoxia, there is restriction of the visual field and loss of peripheral vision known as ‘tunnelling’.
	www.portfolio.mvm.ed.ac.uk /studentwebs/session5/42/hypoxia.html (1609 words)

	Hypoxia (Site not responding. Last check: 2007-09-18)
		Hypoxia a plan to be put in place mechanical ventilation to secure the airway.
		This hypoxia hypoxia usually experienced by law, this draft of methods for the gulf of mexico.
		Histotoxic hypoxia is cyanosis, a maximum in the northern gulf of the meeting.
	hypoxia.brassfinder.net (1297 words)

	Operational Aerospace Physiology
		The primary biochemical concern of anemic hypoxia is that of CO interference in the oxyhemoglobin formation process.
		Stagnant hypoxia is best described as "a reduction in the blood flow to the tissues", again with an emphasis on blood flow to the brain.
		Histotoxic hypoxia is the reduction in the ability of tissues - in particular the brain - to use oxygen, and is exclusively biochemical in nature.
	www.brooksidepress.org /Products/Military_OBGYN/Textbook/MilitaryOrganizations/NavalAviationMedicine/OperationalAerospacePhysiology.htm (11919 words)

	Q-10 Physio Respiratory - ValueMD Medical Schools Forum
		In conditions of anemic hypoxia the arterial partial pressure of oxygen (Pao2) is normal, but the amount of hemoglobin available for oxygen transport is reduced.
		In cases of histotoxic hypoxia the Pao2 and Cao2 are normal and the amount of oxygen delivered to the tissues is adequate, but the cells of the tissues are unable to utilize the oxygen due to impaired respiratory enzymes.
		The effects of stagnant hypoxia depend on the tissue being deprived of blood flow.
	www.valuemd.com /usmle-step-1-forum/18986-q-10-physio-respiratory.html (537 words)

	Page e4 (via CobWeb/3.1 planetlab1.netlab.uky.edu) (Site not responding. Last check: 2007-09-18)
		Hypoxia is caused only by reduced atmospheric pressures caused by altitude and not by other density altitude factors.
		Hypoxia - the absence of an adequate supply of oxygen to the tissues that always results in impairment of function.
		Hypoxia is there whether you are aware of it or not.
	www.whittsflying.com.cob-web.org:8888 /page2.94Health,%20Smoking%20and%20Stress.htm (8204 words)

	Development of Cardiac Sensitivity to Oxygen Deficiency: Comparative and Ontogenetic Aspects -- Ostadal et al. 79 (3): ...
		hypoxia was increased upon increasing the temperature of the perfusion
		to hypoxia was observed in rats (157); the resistance of the
		Effect of adaptation to intermittent high-altitude hypoxia (7,000 m, 8 h/day, 5 days/week, a total of 24 exposures) on cardiac resistance to acute hypoxia (expressed as recovery of isotonic contractions of isolated papillary muscle, percentage of baseline values) in young (exposed from 4th day of postnatal life) and adult (exposed from 12th week) rats.
	physrev.physiology.org /cgi/content/full/79/3/635 (9962 words)

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