Term
|
Definition
|
|
Term
| 4 rationales to use of vitamin supplication |
|
Definition
malabsorption
inability to use vitamins
increased vitamin loss
or increased vitamin requirements |
|
|
Term
| conditions leading to inability to use vitamins (3) |
|
Definition
| liver diseases, renal diseases, some hereditary deficiencies |
|
|
Term
| conditions leading to increased vitamin loss (6) |
|
Definition
| hypothyroidism, hemodialysis, cancer, starvation, fever (from infection) or crash diets |
|
|
Term
| conditions leading to increased vitamin requirements (5) |
|
Definition
| pregnancy, early childhood, gastrointestinal surgeries, debilitating diseases or special diets |
|
|
Term
| rationale for educating patients to contact health provider if taking megadoses of vitamins (supplements) |
|
Definition
| fat soluble vitamins can have toxic effects: adverse reactions can occur |
|
|
Term
| role of vitamin A in body |
|
Definition
| essential for bone growth and epithelial tissue maintenance of eyes, skin and hair |
|
|
Term
| amount of vitamin A that can have a teratogenic effect |
|
Definition
| >6000 international units |
|
|
Term
| maximum dose of vit A for healthy patients |
|
Definition
| <7500 international units |
|
|
Term
| tolerable upper intake (UI) of daily vitamin A |
|
Definition
| 3000 mcg / 10,000 international units |
|
|
Term
| hypervitaminosis A: cause and clinical manifestations |
|
Definition
caused by massive intake of it A.
Symptoms/signs: anorexia, lethargy, nausea, abdominal pain and vomiting |
|
|
Term
| 2 conditions of faster vit A absorption |
|
Definition
| when there is intestinal obstruction or when there is no deficiency |
|
|
Term
| early sign of hypovitaminosis and rationale |
|
Definition
night blindness
rationale: vitamin A needed to to form the visual pigment for night vision |
|
|
Term
| clinical manifestations of hypovitaminosis A |
|
Definition
| night blindness may progress to dryness and ulceration of the cornea and also blindness |
|
|
Term
|
Definition
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