菜单
关闭
显示 521-530 在......之外 1141 条款
很抱歉，看起来有错误。请尽快再试一次。
The new international system (SI) unit of radiation dose, expressed as absorbed energy per unit mass of tissue. The SI unit "gray" has replaced the older "rad" designation. 1 Gy = 1 Joule/kilogram = 100 rad. Gray can be used for any type of radiation (e.g., alpha, beta, neutron, gamma), but it does not describe the biological effects of different radiations. Biological effects of radiation are measured in units of "sievert" (or the older designation "rem"). Sievert is calculated as follows: gray multiplied by the "radiation weighting factor" (also known as the "quality factor") associated with a specific type of radiation.
A doctor who has special training in diagnosing and treating diseases of the female reproductive organs.
A shaft or opening on the surface of the skin through which hair grows.
The removal of a donor's bone marrow prior to bone marrow transplant.
A substance that causes a chemical change that stops tumor cells from dividing. HDAC inhibitors are being studied in the treatment of cancer. Also called histone deacetylase inhibitor.
Cancer that arises in the head or neck region (in the nasal cavity, sinuses, lips, mouth, salivary glands, throat, or larynx [voice box]).
A record of information about a person’s health. A personal health history may include information about allergies, illnesses, surgeries, immunizations, and results of physical exams and tests. It may also include information about medicines taken and health habits, such as diet and exercise. A family health history includes health information about a person’s close family members (parents, grandparents, children, brothers, and sisters). This includes their current and past illnesses. A family health history may show a pattern of certain diseases in a family. Also called medical history.
A licensed person or organization that provides healthcare services.
A type of advance directive that gives a person (such as a relative, lawyer, or friend) the authority to make healthcare decisions for another person. It becomes active when that person loses the ability to make decisions for himself or herself. Also called HCP.
A heart attack happens when the flow of oxygen-rich blood in one or more of the coronary arteries, which supply the heart muscle, suddenly becomes blocked, and a section of heart muscle can’t get enough oxygen. The blockage is usually caused when a plaque ruptures. If blood flow isn’t restored quickly, either by a medicine that dissolves the blockage or a catheter placed within the artery that physically opens the blockage, the section of heart muscle begins to die.
