Carboxyhemoglobin

carboxyhemoglobin

[kär¦bäk·sē¦hē·mə‚glō·bən] (biochemistry) carbonmonoxyhemoglobin

Carboxyhemoglobin

HbCO, a compound formed by the binding of carbon monoxide (CO) to hemoglobin (Hb).

Carboxyhemoglobin solutions are bright red. Their absorption spectrum has maximums at wavelengths of 570 and 539 mμ. Carboxyhemoglobin breaks down to Hb and CO 10, 000 times more slowly than does oxyhemoglobin to Hb and O₂. Therefore, when CO is present in inhaled air the oxygen is gradually displaced from the hemoglobin. Even at an atmospheric CO concentration of 0.1 percent, more than half the hemoglobin in the blood is converted to carboxyhemoglobin, interfering with the transfer of O₂ from the lungs to the tissues and causing carbonmonoxide poisoning.

carboxyhemoglobin

[kahr-bok″se-he´mo-glo″bin] hemoglobin in which the sites usually bound to oxygen are bound to carbon monoxide molecules; carbon monoxide has an affinity for hemoglobin over 200 times that of oxygen. See carbon monoxide poisoning.

car·box·y·he·mo·glo·bin (HbCO),

(kar-bok'sē-hē'mō-glō'bin), A fairly stable union of carbon monoxide with hemoglobin. The formation of carboxyhemoglobin prevents the normal transfer of carbon dioxide and oxygen during the circulation of blood; thus, increasing levels of carboxyhemoglobin result in various degrees of asphyxiation, including death. Synonym(s): carbon monoxide hemoglobin, carbonmonoxy myoglobin

carboxyhemoglobin

(kär-bŏk′sē-hē′mə-glō′bĭn)n. The compound that is formed when inhaled carbon monoxide combines with hemoglobin, binding more tightly than oxygen and rendering the hemoglobin incapable of transporting oxygen.

carboxyhemoglobin

Haemoglobin (Hb) with irreversibly bound carbon monoxide (COHb). COHb levels reflect CO exposure, which increases in fires and with exposure to car exhaust; Some COHb occurs naturally as a product of Hb catabolism and due to increased turnover of Hb in newborns, coupled with reduced efficiency of the infant’s respiratory system, leading to increased COHb.
Carboxyhaemoglobin levels
• < 2%: Non-smokers;
• 2%–12%: Smokers;
• > 20%: Toxic;
• > 50%: Lethal.

carboxyhemoglobin

COHb Hb in which carbon monoxide–CO is irreversibly bound

car·box·y·he·mo·glo·bin

(kahr-bok'sē-hē'mŏ-glō'bin) A stable union of carbon monoxide with hemoglobin. The formation of carboxyhemoglobin prevents the normal transfer of carbon dioxide and oxygen during the circulation of blood; thus, increasing levels of carboxyhemoglobin result in various degrees of asphyxiation, including death.
Synonym(s): carbon monoxide hemoglobin, carboxyhaemoglobin.

Carboxyhemoglobin (COHb)

Hemoglobin that is bound to carbon monoxide instead of oxygen.Mentioned in: Carbon Monoxide Poisoning

单词	carboxyhemoglobin
释义	carboxyhemoglobin car·box·y·he·mo·glo·bin C0103200 (kär-bŏk′sē-hē′mə-glō′bĭn)n. The compound that is formed when inhaled carbon monoxide combines with hemoglobin, binding more tightly than oxygen and rendering the hemoglobin incapable of transporting oxygen. Translations Carboxyhemoglobin carboxyhemoglobin [kär¦bäk·sē¦hē·mə‚glō·bən] (biochemistry) carbonmonoxyhemoglobin Carboxyhemoglobin HbCO, a compound formed by the binding of carbon monoxide (CO) to hemoglobin (Hb). Carboxyhemoglobin solutions are bright red. Their absorption spectrum has maximums at wavelengths of 570 and 539 mμ. Carboxyhemoglobin breaks down to Hb and CO 10, 000 times more slowly than does oxyhemoglobin to Hb and O₂. Therefore, when CO is present in inhaled air the oxygen is gradually displaced from the hemoglobin. Even at an atmospheric CO concentration of 0.1 percent, more than half the hemoglobin in the blood is converted to carboxyhemoglobin, interfering with the transfer of O₂ from the lungs to the tissues and causing carbonmonoxide poisoning. carboxyhemoglobin carboxyhemoglobin [kahr-bok″se-he´mo-glo″bin] hemoglobin in which the sites usually bound to oxygen are bound to carbon monoxide molecules; carbon monoxide has an affinity for hemoglobin over 200 times that of oxygen. See carbon monoxide poisoning. car·box·y·he·mo·glo·bin (HbCO), (kar-bok'sē-hē'mō-glō'bin), A fairly stable union of carbon monoxide with hemoglobin. The formation of carboxyhemoglobin prevents the normal transfer of carbon dioxide and oxygen during the circulation of blood; thus, increasing levels of carboxyhemoglobin result in various degrees of asphyxiation, including death. Synonym(s): carbon monoxide hemoglobin, carbonmonoxy myoglobin carboxyhemoglobin (kär-bŏk′sē-hē′mə-glō′bĭn)n. The compound that is formed when inhaled carbon monoxide combines with hemoglobin, binding more tightly than oxygen and rendering the hemoglobin incapable of transporting oxygen. carboxyhemoglobin Haemoglobin (Hb) with irreversibly bound carbon monoxide (COHb). COHb levels reflect CO exposure, which increases in fires and with exposure to car exhaust; Some COHb occurs naturally as a product of Hb catabolism and due to increased turnover of Hb in newborns, coupled with reduced efficiency of the infant’s respiratory system, leading to increased COHb. Carboxyhaemoglobin levels • < 2%: Non-smokers; • 2%–12%: Smokers; • > 20%: Toxic; • > 50%: Lethal. carboxyhemoglobin COHb Hb in which carbon monoxide–CO is irreversibly bound car·box·y·he·mo·glo·bin (kahr-bok'sē-hē'mŏ-glō'bin) A stable union of carbon monoxide with hemoglobin. The formation of carboxyhemoglobin prevents the normal transfer of carbon dioxide and oxygen during the circulation of blood; thus, increasing levels of carboxyhemoglobin result in various degrees of asphyxiation, including death. Synonym(s): carbon monoxide hemoglobin, carboxyhaemoglobin. Carboxyhemoglobin (COHb) Hemoglobin that is bound to carbon monoxide instead of oxygen.Mentioned in: Carbon Monoxide Poisoning FinancialSeeCOSee COHb See COHbThesaurusSeecarbon monoxide
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