What is the cause of cyanosis?

summary

Cyanosis refers to the increase of reduced hemoglobin in the blood, which makes the skin and mucous membrane blue and purple. It can also be called cyanosis. This change often occurs in thin skin, less pigment and capillary rich parts, such as lips, fingers (toes), nail bed and so on. What are the causes of cyanosis?

What is the cause of cyanosis?

Central cyanosis: it is caused by the decrease of arterial oxygen saturation caused by heart and lung diseases. Cyanosis caused by respiratory diseases is called pulmonary cyanosis. It is common in respiratory obstruction, severe pneumonia, pulmonary congestion, pulmonary edema, massive pleural effusion, spontaneous pneumothorax, etc. Cyanosis caused by cardiovascular disease is called cardiac cyanosis, which is common in cyanotic congenital heart disease such as tetralogy of Fallot. Its clinical feature is systemic cyanosis. Cyanosis can be seen in the skin and mucous membrane of trunk (including tongue and oral mucous membrane) besides the extremities and face (lip, nose tip, cheek and earlobe). The skin of cyanotic part is warm, and cyanosis does not disappear after local heating or massage.

Peripheral cyanosis: due to the disturbance of peripheral circulation. It can be seen in systemic congestion, hypoperfusion of peripheral tissue, local blood circulation disorders, such as right heart failure, massive pericardial effusion, severe shock, thromboangiitis obliterans, cold stimulation, etc. The clinical characteristics of cyanosis are that cyanosis often occurs in the extremities and sagging parts, such as the extremities, earlobes, Nose Tips, etc. the skin of cyanotic parts is cool. If the skin is warmed or massaged to make it warm, cyanosis can be alleviated or disappeared.

Mixed cyanosis: central cyanosis and peripheral cyanosis coexist at the same time, common in total heart failure. Methemoglobinemia: it can be caused by poisoning of primary aminoquinoline, nitrite, sulfonamides, nitrobenzene, aniline and other drugs or chemicals; It can also cause "enterogenous cyanosis" by eating a lot of deteriorated vegetables containing nitrite. The clinical characteristics of cyanosis are sudden appearance, temporary, critical condition, and persistent cyanosis after oxygen therapy. The extracted venous blood is dark brown and cannot turn into bright red even when exposed to air. If intravenous injection of methylene blue, sodium thiosulfate or large dose of vitamin C, cyanosis can be eliminated. There are very few patients with congenital methemoglobinemia, cyanosis since childhood, family history and good health.

matters needing attention

The first is a balanced diet, because cardiac cancer patients consume a lot, so we must ensure that there is enough nutrition. The simplest way to measure the nutritional quality of patients is whether they can maintain their weight, and the best way to maintain their weight at a normal level is to have a balanced diet. Patients are required to eat high calorie, high-quality protein, vitamin rich foods, such as fish, lean meat, milk, mushrooms, mushrooms and so on.