How did the artery high pressure of lung happen? 's general knowledge

How did the artery high pressure of lung happen? 's general knowledge
The emergence of the artery high pressure of lung is a complicated course, it is not very clear to bring out the mechanism of the high pressure of lung artery. It is generally acknowledged layer when unusual course take place, might cause the artery high pressure of lung inside as the intersection of lung and artery.
Lung the intersection of artery and high pressure layer made up of endothelial cell, can secrete, keep the intersection of blood vessel and normal chemical material of function by a lot of inside, such as forefront the intersection of ring and plain, nitrous oxides, thrombus plain inner skin plain, etc. These materials pass and control a lot of different systems, together with course in the other bodies, maintain the normal flow of the blood, comprising:
Vascular shrink and relaxation
Growth of normal cells and the tissue
Offer fiber material of kind ' Pass one to known as " The fiber " Course) Offer the framework for all cells and tissues
Clearance and replacement of old and feeble cells
Prevent the forming of the blood clot, otherwise the blood clot may prevent the blood circulation
When you suffer from the artery high pressure of lung, the equilibrium lose among these chemical materials. The inner cover is plain and increase horizontally with plain thrombus, the plain level with the nitrous oxides of the forefront ring drops, thus weaken the organism and protect it against the ability that the course of specific pathological change damages in the artery high pressure of lung, cause the function to be unusual:
Growth not controllable of cell
Control the intersection of blood vessel and shrink and cell of relaxation ' Smooth muscle cells) Loud and is organized by the scar ' Because " fiber " )Cover, can't give play to its normal function
Should die and continue, survive old and feeble cell that remove, compatible to stay in blood vessel, make each the intersection of blood vessel and cell quantity of lining increase
Blood cell, such as blood platelet and erythrocyte, together with too many fiber - like materials, bind each other in the blood vessel, form the great one, is known as " thrombus " Blood clot.
The result of all these course makes the heart flow into the dirty blood flow of lung and is limited gradually, channel the intersection of lung and dirty a lot of little lung artery blood vessel into, damage from the intersection of lung and artery ' It seems that one rolls the confused blood vessel out of control under the microscope) ,Claim the clump is damaged, stop up within the small lung artery and become firm and enable blood vessel wall cicatrix gradually.
|