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Three main changes are seen in the mechanism of Raynaud's phenomenon which are reduced blood flow, blood vessel constriction, and neurogenic, inflammatory, and immune responses. It is induced by mental stress and a cold atmosphere. In all cases, the primary cause is an underlying hyperactivation of the sympathetic nervous system. [19]
The body normally attempts to compensate for this homeostatically, but if this fails or is overridden, the blood pH will rise, leading to respiratory alkalosis. This increases the affinity of oxygen to hemoglobin and makes it harder for oxygen to be released into body tissues from the blood. The symptoms of respiratory alkalosis include ...
Hyperventilation syndrome (HVS), also known as chronic hyperventilation syndrome (CHVS), dysfunctional breathing hyperventilation syndrome, cryptotetany, [1] [2] spasmophilia, [3] [4] [5] latent tetany, [4] [5] and central neuronal hyper excitability syndrome (NHS), [3] is a respiratory disorder, psychologically or physiologically based, involving breathing too deeply or too rapidly ...
Bad breath happens to everyone from time to time. That's why there are so many gums, mints and mouthwashes advertised to get rid of it fast. Halitosis (the medical term for bad breath) is usually ...
First, a quick science lesson on cold hands: “The body regulates the temperature of the hand mainly by controlling blood flow through the radial and the ulnar arteries,” Dr. Abayomi Ogunwale ...
Contact lenses and certain medications can also cause dry eye, she says, adding: “If you think you are experiencing dry eye, talk to your ophthalmologist about the best treatment options for you.”
Contact lenses cause corneal neovascularization because they restrict oxygen diffusion to the corneal epithelium. In the short term, the cornea responds to oxygen deprivation by increasing blood flow to the corneal limbus, the narrow circular border between the cornea and sclera. Over time, this chronic limbal hyperemia can progress to corneal ...
Best known is the higher risk of normal tension glaucoma, a disease with an impaired regulation of blood flow in a large number of patients. [9] If glaucomatous damage occurs despite normal eye pressure or if glaucomatous damage is progressive despite normalized intraocular pressure, frequently Flammer syndrome is the cause.