pump

pump

 [pump]

1. an apparatus for drawing or forcing liquid or gas.

2. to draw or force liquids or gases.

blood pump a machine used to propel blood through the tubing of extracorporeal circulation devices.

breast pump a pump for taking milk from the breast.

calcium pump the mechanism of active transport of calcium (Ca²⁺) across a membrane, as of the sarcoplasmic reticulum of muscle cells, against a concentration gradient; the mechanism is driven by hydrolysis of ATP.

enteral feeding pump an infusion pump specifically designed for administration of a solution through a feeding tube.

insulin pump see insulin pump.

intra-aortic balloon pump see intra-aortic balloon pump.

muscle pump compression of veins by the contraction of skeletal muscles, forcing blood towards the heart against the flow of gravity; seen particularly in the deep veins of the lower limbs. Called also venous pump.

Na⁺-K⁺ pump sodium-potassium pump.

proton pump a system for transporting protons across cell membranes, often exchanging them for other positively charged ions.

sodium pump (sodium-potassium pump) the mechanism of active transport driven by the energy generated by Na⁺,K⁺-ATPase, by which sodium (Na⁺) is extruded from a cell and potassium (K⁺) is brought in, so as to maintain the low concentration of sodium and the high concentration of potassium within the cell with respect to the surrounding medium. A high concentration of intracellular potassium is necessary for vital processes such as protein biosynthesis, certain enzyme activities, and maintenance of the membrane potential of excitable cells. Called also Na⁺-K⁺ pump.

stomach pump see stomach pump.

venous pump muscle pump.

Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

pump

(pŭmp),

1. An apparatus for forcing a gas or liquid from or to any part.

2. Any mechanism for using metabolic energy to accomplish active transport of a substance.

Farlex Partner Medical Dictionary © Farlex 2012

pump

(pŭmp)

n.

1. A machine or device for raising, compressing, or transferring fluids.

2. Physiology A molecular mechanism for the active transport of ions or molecules across a cell membrane.

v. pumped, pumping, pumps

v.tr.

1. To cause to flow by means of a pump or pumplike organ or device: Derricks pumped oil out of the ground. The heart pumps blood throughout the body.

2. To draw, deliver, or pour forth: a writer who pumped out a new novel every year.

3. To propel, eject, or insert: pumped new life into the economy.

4. To cause to move with an up-and-down or back-and-forth motion: a bicyclist pumping the pedals; a piston pumping a shaft.

5. To push or pull (a brake or lever, for instance) rapidly: a driver pumping the brakes.

6. To shoot (bullets, for example) at or into: a gunner pumping rounds at a target.

7. Physics To raise (atoms or molecules) to a higher energy level by exposing them to electromagnetic radiation at a resonant frequency.

8. Physiology To transport (ions or molecules) against a concentration gradient by the expenditure of chemically stored energy.

9. To invest (money) repeatedly or persistently in something.

10. To question closely or persistently: pump a witness for secret information.

11. Informal To promote or publicize vigorously: The company pumped its new product on its website.

v.intr.

1. To operate a pump.

2. To move gas or liquid with a pump or a pumplike organ or device.

3. To move up and down or back and forth in a vigorous manner: My legs were pumping as I ran up the stairs.

4. To flow in spurts: Blood was pumping from the wound.

5. Sports To fake a throw, pass, or shot by moving the arm or arms without releasing the ball.

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pump′er n.

The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

Physiology A cell membrane-bound ion channel that maintains a gradient between one side and the other of H+, Cl-, etc.
Sports medicine Body-building A muscle that is well larger than normal, a result of aggressive exercise; pumped muscles have greater definition and the vessels are squeezed to the surface
Therapeutics A device used to deliver a precise amount of medication at a specific rate
Vox populi A device, structure or other artifice that causes a fluid or specific molecules to flow in a designated direction

Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

pump

Therapeutics A device used to deliver a precise amount of medication at a specific rate. See Implantable pump, Implantable insulin pump, Infusion pump, Insulin pump Vox populi A device, structure or other artifice that causes a fluid or specific molecules to flow in a designated direction. See Breast pump, Colleague 3 infusion pump, Intra-aortic balloon pump, Lymphatic pump, Mechanical infusion pump, Proton pump.

McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

pump

(pŭmp)

1. An apparatus for forcing a gas or liquid from or to any part.

2. Any mechanism for using metabolic energy to accomplish active transport of a substance.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

pump

(pŭmp)

1. Apparatus for forcing gas or liquid from or to any part.

2. Any mechanism for using metabolic energy to accomplish active transport of a substance.

Medical Dictionary for the Dental Professions © Farlex 2012