Hemoglobin derivatives are altered forms of hemoglobin, a protein in red blood cells that moves oxygen and carbon dioxide between the lungs and body tissues.
This article discusses the test used to detect and measure the amount of hemoglobin derivatives in your blood.
Alternative NamesMethemoglobin; Carboxyhemoglobin; Sulfhemoglobin
How the test is performedThe test is performed using a small needle to collect a sample of blood from an artery. The sample may be collected from an artery in the wrist, groin, or arm.
Before blood is drawn, the health care provider may test circulation to the hand (if the wrist is the site). After the blood is drawn, pressure applied to the puncture site for a few minutes stops the bleeding.
See also: Blood gases
How to prepare for the testNo special preparation is needed.
If your child is going to have this test, it may help to explain how the test will feel, and even demonstrate on a doll. Explain the reason for the test. Knowing the "how and why" may reduce the anxiety your child feels.
How the test will feelWhen the needle is inserted to draw blood, you may feel moderate pain, or only a prick or stinging sensation. Afterward, there may be some throbbing.
Why the test is performedThis test is used to diagnose carbon monoxide poisoningand other changes in hemoglobin that may result from certain drugs. If certain chemicals or drugs get into the blood stream, they can change the hemoglobin so it no longer works properly.
For example, carboxyhemoglobin is an abnormal form of hemoglobin that attaches to carbon monoxide instead of oxygen or carbon dioxide. High amounts of this type of abnormal hemoglobin prevent the normal movement of oxygen by the blood.
Sulfhemoglobin is a rare abnormal form of hemoglobin that cannot carry oxygen. It may result from certain medicines such as phenacetin or sulfonamides.
Methemoglobin occurs when the iron that is part of hemoglobin is changed so that it does not carry oxygen well. Certain compounds introduced into the blood stream can cause this problem:
See also: Methemoglobinemia
Normal ValuesThe following values represent the percentage of hemoglobin derivatives based on total hemoglobin:
High levels of hemoglobin derivatives can lead to significant health problems. The altered forms of hemoglobin do not allow oxygen to be moved properly through the body. This can lead to tissue death.
The following values, except sulfhemoglobin, represent the percentage of hemoglobin derivatives based on total hemoglobin:
Carboxyhemoglobin:
Methemoglobin:
Sulfhemoglobin:
Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.
Other risks associated with having blood drawn are slight but may include:
Christiani DC. Physical and chemical injuries of the lung. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 94.
Nagel RL. Methemoglobinemias and unstable hemoglobins. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 168.
In saturated hemoglobin, each hemoglobin molecule can bind to four molecules of oxygen. Therefore, in saturated hemoglobin, there would be a total of four molecules of oxygen bound to each hemoglobin molecule.
Methemoglobin is the type of hemoglobin that contains iron in the ferric state. This occurs when hemoglobin is unable to bind with oxygen and becomes oxidized, resulting in a form of hemoglobin that cannot effectively transport oxygen to tissues.
The mineral element connected to hemoglobin is Iron.
Carbon monoxide binds to hemoglobin because it has a higher affinity for hemoglobin than oxygen does. This means that carbon monoxide can displace oxygen from hemoglobin, leading to a decrease in the amount of oxygen that can be transported in the blood.
There is approximately 3.47 mg of iron in 1 gram of hemoglobin.
hemoglobin
No, hemoglobin is a protein.
what is hemoglobin?
Hypochromia (as in hypochromic anemia) is the medical term meaning deficiency in hemoglobin.
No, hemoglobin is a protein.
Yes crocodiles do have a Hemoglobin.
Well, the high concentration of hemoglobin is what gives our blood its red color. More specifically, the porphyrin functional group in the hemoglobin structure is what gives hemoglobin (and oxy-hemoglobin) its red hue.DO NOT LET ANYONE TELL YOU THAT HEMOGLOBIN IS RED BECAUSE OF THE IRON IN THE CENTER OF ITS STRUCTURE. THEY WOULD BE LYING TO YOU.
Hemoglobin carries oxygen to the cells. Hemoglobin is contained in red blood cells.
hemoglobin is the cause thats why your blood is red
Heme + globin is Hemoglobin.
Hemoglobin is the oxygen carrier.
the respiratory pigment in humans is hemoglobin