Petechiae Health Dictionary

A group of viruses that infect mice, rats and voles and can also infect humans who come into contact with the excreta or secretions of these animals. Widely distributed in Asia, the USA and Europe, in Britain hantavirus usually affects rural and sewage workers, as well as people engaged in watersports. Many victims have a mild feverish illness; severe cases are characterised by headache, high temperature, nausea, vomiting and even shock, accompanied by skin PETECHIAE. The kidneys and sometimes the lungs are affected, and in severely affected patients mortality is high.... hantavirus

A skin rash caused by bleeding into the skin from capillary blood vessels. The discrete purple spots of the rash are called purpuric spots or, if very small, petechiae. The disorder may be caused by capillary defects (nonthrombocytopenic purpura) or be due to a de?ciency of PLATELETS in the blood (thrombocytopenic purpura). Most worryingly, the rash may be due to a fulminant form of meningococcal SEPTICAEMIA called purpura fulminans. (See also HENOCH-SCHÖNLEIN PURPURA; IDIOPATHIC THROMBOCYTOPENIC PURPURA (ITP); THROMBOCYTOPENIA.).... purpura

A positive tourniquet test with scattered fine petechiae is one of the earliest clinical signs in dengue haemorrhagic fever.... tourniquet test

Fagopyrum esculentum (Moench). French: Sarrasin. German: Buchweizen. Spanish: Alforfon. Italian: Grano saroceno. Japanese: Soba. Flowers and leaves.

Action: vein-restorative, hypotensive, anti-haemorrhage, vasodilator. Contains Rutin, an anti-coagulant. Source of magnesium.

Uses: Radiation damage, high blood pressure, capillary fragility, varicose veins, petechiae, retinal haemorrhage, spontaneous bruising, circulatory stasis, purple patches on skin due to capillary haemorrhages, temporal arteritis, visible pulsation of carotid artery in the neck, frostbite, chilblains. Preparations. Green Buckwheat tea (Rutin); a caffeine-free tea. One heaped teaspoon to each cup boiling water. Half-1 cup as desired.

Formula. Tablets or capsules: Rutin 60mg; Vitamin C 20mg; Chlorophyll 20mg. ... buckwheat

The term applied to the acute effects of ionizing radiation on the whole, or a major part, of the body when the dose is greater than 1 gray (1 Gy) of X-rays or gamma rays, or 1 sievert (1 Sv) of other types of radiation. The effect of radiation depends on the dose and the exposure time. Total-body doses of less than 2 Gy are unlikely to be fatal to a healthy adult. At doses of 1–10 Gy, transient nausea and occasional vomiting may occur, but usually disappear rapidly and are often followed by a 2–3 week period of relative well-being. By the end of this period, the effects of radiation damage to the bone marrow and immune system begin to appear, with repeated infections and petechiae (pinpoint spots of bleeding under the skin). Some people are successfully treated with a bone marrow transplant or by isolation in a sterile environment until the bone marrow recovers.

With a dose of 10–30 Gy there is also an early onset of nausea and vomiting, which tends to disappear a few hours later. However, damage to the gastrointestinal tract, which causes severe and frequently bloody diarrhoea (called the gastrointestinal syndrome), and overwhelming infection due to damage to the immune system is likely to result in death 4–14 days after exposure.

Acute exposures of more than 30–100 Gy cause the rapid onset of nausea, vomiting, anxiety, and disorientation.

Within hours, the victim usually dies due to nervous system damage and oedema of the brain; these effects are called the central nervous system syndrome.... radiation sickness