Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «P»:
Postpartum depression: A form of severe depression after delivery that requires treatment. It is sometimes said that postpartum depression (PPD) occurs within 4 weeks of delivery but it can happen a few days or even months after childbirth. A woman with PPD may have feelings similar to the baby blu...
Postpartum psychosis: A very serious mental illness that can affect a new mother. The episode of psychosis usually begins within 1 to 3 months of delivery. A woman with postpartum psychosis may lose touch with reality and have auditory hallucinations (hearing things that are not actually happening, ...
Postphlebitic syndrome: See: Post-thrombotic syndrome....
Postpolio syndrome (PPS)
Postpolio syndrome (PPS): Persons who have had polio may develop newly progressive fatigue, pain, and weakness 15 or more years after recovery from poliomyelitis. In some cases, muscle atrophy (muscle wasting) also occurs as part of PPS. In most cases, however, new symptoms are not due to progressio...
Postprandial: After mealtime. A postprandial rise in the blood glucose level is one that occurs after eating.
Most medical terms have a reasonably logical derivation. Not so with "postprandial." The "post-" part is Latin for "behind, backward, later, or afterward." The "prandial" part comes from the...
Postremission therapy: Chemotherapy to kill leukemia cells that
survive after remission induction therapy....
Postulates, Koch's: In 1890 the German physician and bacteriologist Robert Koch set out his celebrated criteria for judging whether a given bacteria is the cause of a given disease. Koch's criteria brought some much-needed scientific clarity to what was then a very confused field.
Koch's postulates ...
Postural: Pertaining to the posture or position of the body, the attitude or carriage of the body as a whole, or the position of the limbs (the arms and legs). Postural hypotension is a drop in blood pressure (hypotension) due to a change in body position (a change in posture). It occurs when a pers...
Postural hypotension: A drop in blood pressure (hypotension) due to a change in body position (posture) when a person moves to a more vertical position: from sitting to standing or from lying down to sitting or standing. Postural hypotension is more common in older people.
The change in position ca...
Posture: The carriage of the body as a whole, the attitude of the body, or the position of the limbs (the arms and legs).
"Postural" pertains to the posture or position. For example, postural hypotension is a drop in blood pressure (hypotension) due to a change in body position (a change in posture)...
Posture, neutral: See: Neutral posture....
Posture, static: See: Static posture....
Potassium: The major positive ion (cation) found inside of
cells. The chemical notation for potassium is K+. The
proper level of potassium is essential for normal cell function. An
abnormal increase of potassium (hyperkalemia) or decrease of
potassium (hypokalemia) can profoundly affect the nerv...
Potassium balance: The balance between too much potassium and, far more often today, too little potassium. Adults should consume at least 4.7 grams of potassium per day to lower blood pressure, blunt the effects of salt, and reduce the risk of kidney stones and bone loss, according to a report in 20...
Potassium deficiency: Inadequate potassium intake and hence potassium levels in the blood that are abnormally low. This state is termed hypokalemia. For further information, see: Hypokalemia and Potassium balance....