Henna
A coloring made from the leaves of the Egyptian privet, Lawsonia inermis. Approved only for use as a hair dye, not for direct application to the skin, as in the body-decorating process known as mehndi. This unapproved use of a color additive to henna makes these products adulterated and therefore illegal. Injuries to the skin can result from products marketed as henna.
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- HEPA
Acronym that stands for High-Efficiency Particulate Air and for High-Efficiency Particulate Arrestor. HEPA filters are used for isolation and immunocompromise units, operating rooms, removal of allergens from the air (for hay fever, asthma, etc.) and other applications where maximum reduction or removal of submicron particulate matter from air is required.
- Hepar
The liver or a preparation made from it. The term hepar is not often used today. It is a direct borrowing of the Greek hepar, liver.
- Heparin
An anticoagulant (anti-clotting) medication. Heparin is useful in preventing thromboembolic complications (clots that travel from their site of origin through the blood stream to clog up another vessel). Heparin is also used in the early treatment of blood clots in the lungs (pulmonary embolisms).
- Heparin, low-weight
Lovenox, Fragmin) that has a lower molecular weight than normal heparin. Fewer blood tests are needed, and it may be . superior to regular (unfractionated) heparin in cases of unstable angina and other cardiac diseases. See also heparin.
- Heparin-induced thrombocytopenia
Low blood platelet count as a result of the medication heparin. HIT (Heparin induced thrombocytopenia) is caused by the body forming antibodies to Heparin when it is bound to platelet factor4 (PF4) – a protein in the blood. These antibodies bind to the combination of Heparin and PF4 and activate platelets which in turn clump […]