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Drugs and diseases reference index
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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «P»:

  1. Pulse, pistol-shot Pulse, pistol-shot
    Pulse, pistol-shot: See: Pulse, water hammer....
  2. Pulse, trip-hammer Pulse, trip-hammer
    Pulse, trip-hammer: See: Pulse, water hammer....
  3. Pulse, water hammer Pulse, water hammer
    Pulse, water hammer: A jerky pulse that is full and then collapses because of aortic insufficiency (when blood ejected into the aorta regurgitates back through the aortic valve into the left ventricle). This type of pulse was likened to a water hammer, a Victorian toy consisting of a glass tube fi...
  4. Pulseless disease Pulseless disease
    Pulseless disease: Takayasu disease. Called pulseless disease because inflammation of blood vessels (vasculitis) can lead to reduced or absent pulses in the arms or legs. See: Takayasu disease....
  5. Pump-oxygenator Pump-oxygenator
    Pump-oxygenator: A machine that does the work both of the heart (pump blood) and the lungs (oxygenate the blood). Used, for example, in open heart surgery. Blood returning to the heart is diverted through the machine before returning it to the arterial circulation. Also called a heart-lung machi...
  6. Punch biopsy Punch biopsy
    Punch biopsy: A biopsy performed using a punch, an instrument for cutting and removing a disk of tissue. For example, a punch biopsy of the skin may be done to make the diagnosis of a malignancy. See also: Skin biopsy....
  7. Puncture wound Puncture wound
    Puncture wound: An injury caused by a pointed object that pierces or penetrates the skin. Any puncture wound through tennis shoes (as with a nail) has a high risk of infection, because the foam in tennis shoes can harbor the bacteria Pseudomonas. Puncture wounds also carry a danger of tetanus....
  8. Puncture, lumbar Puncture, lumbar
    Puncture, lumbar:A lumbar puncture or "LP" is a procedure whereby spinal fluid is removed from the spinal canal for the purpose of diagnostic testing. It is particularly helpful in the diagnosis of inflammatory diseases of the central nervous system, especially infections, such as meningitis. It...
  9. Pupil Pupil
    Pupil: The opening of the iris. The pupil may appear to open (dilate) and close (constrict) but it is really the iris that is the prime mover; the pupil is merely the absence of iris. The pupil determines how much light is let into the eye. Both pupils are usually of equal size. If they are not,...
  10. Pupil dilation test Pupil dilation test
    Pupil dilation test: An examination that enables an eye care professional to see more of the retina, the light-sensitive layer of tissue at the back of the eye. Dilating (widening) the pupil permits the retina to be examined for signs of disease. To do this, drops are placed into the eye to dil...
  11. Purine Purine
    Purine: One of the two classes of bases in DNA and RNA. The purine bases are guanine (G) and adenine (A). Uric acid, the offending substance in gout, is a purine end-product....
  12. Purpura Purpura
    Purpura: 1. A hemorrhagic area in the skin. The area of bleeding within the skin, by definition, is greater than 3 millimeters in diameter. The appearance of the purpura depends on age of the lesion. Early purpura is red and becomes darker, then purple, and brown-yellow as it fades. Purpura does not...
  13. Purpura, acute thrombocytopenic Purpura, acute thrombocytopenic
    Purpura, acute thrombocytopenic: See: Acute thrombocytopenic purpura....
  14. Purpura, allergic Purpura, allergic
    Purpura, allergic: See: Schonlein-Henoch purpura....
  15. Purpura, anaphylactoid Purpura, anaphylactoid
    Purpura, anaphylactoid: See: Schonlein-Henoch purpura....