Principles of Pulse Oximetry

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Pulse oximetry is a noninvasive spectroscopic technique that estimates arterial oxygen saturation. The device enables the use of the pulse oximeter in more challenging situations with low perfusion or hypoxemia, and analysis of the plethysmographic waveform may lead to more clinical information in the future. • It helps measure hemoglobin saturation, not ventilation and is not a complete measure of respiratory sufficiency. Iron is needed to form hemoglobin, part of red blood cells that carry oxygen and remove carbon dioxide (a waste product) from the body. Iron is mostly stored in the body in the hemoglobin. About one-third of iron is also stored as ferritin and hemosiderin in the bone marrow, spleen, and liver. • hemoglobin typically consists of four protein subunits: two subunits of beta-globin and two subunits of a protein called alpha-globin, which is produced from another gene called HBA. Hemoglobin (haemoglobin,[a] Hb or Hgb) is a protein containing iron that facilitates the transport of oxygen in red blood cells. Almost all vertebrates contain hemoglobin, with the exception of the fish family Channichthyidae. • Hemoglobin in the blood carries oxygen from the respiratory organs (lungs or gills) to the other tissues of the body, where it releases the oxygen to enable aerobic respiration which powers the animal's metabolism. A healthy human has 12 to 20 grams of hemoglobin in every 100 mL of blood. Hemoglobin is a metalloprotein, a chromoprotein, and globulin. • #clinical #education #learning #medical #trending #paramedics #paramedicstudent #doctor #medicalstudent #nursing

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