Negative, false
A result that appears negative when it should not. An example of a false negative would be if a particular test designed to detect cancer returns a negative result but the person actually does have cancer.
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- Negative clinical trial
Inconclusive clinical trial; Non-inferior clinical trial; Positive clinical trial.
- Neglect, child
Physical neglect includes refusal of or delay in seeking health care, abandonment, expulsion from the home or refusal to allow a runaway to return home, and inadequate supervision. Educational neglect includes the allowance of chronic truancy, failure to enroll a child of mandatory school age in school, and failure to attend to a special educational […]
- Nadir
The lowest point. The nadir may refer, for example, to the lowest blood count after chemotherapy or the lowest concentration of a drug in the body.
- Na (sodium)
Na is the chemical symbol for sodium. From natrium, a synonym for sodium. Sodium is the major positive ion (cation) in fluid outside of cells. The chemical notation for sodium is Na+. When combined with chloride (Cl), the resulting substance is table salt (NaCl). Excess sodium (such as from fast food hamburger and fries) is […]
- n-Hexane
Teach children and teenagers the dangers of inhaling products that contain n-hexane. Keep products containing n-hexane (quick-drying glues and cements) out of the reach of children. Maintain proper ventilation when using these products. Never store household chemicals in containers, such as old soda bottles, that children might find attractive. If a person has been exposed […]