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
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
proton pump a system for transporting protons across cell membranes, often exchanging them for other positively charged ions.
) the mechanism of active transport driven by the energy generated by Na+
, 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.
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
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.
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.
1. An apparatus that transfers fluids or gases by pressure or suction.
2. To force air or fluid along a certain pathway, as the heart does to blood.
A device for forcing air in or out of a chamber.
1. A device for pumping blood. It is attached to an extracorporeal circulation system.
2. A compression sleeve placed about a plastic transfusion bag.
An apparatus for expressing milk from the human breast.
A cell membrane protein channel that selectively admits or excludes chemicals from the cytoplasm. In some bacteria efflux pumps prevent their cells from accumulating antibiotics, contributing to drug resistance.
electronic implantable infusion pump Abbreviation: EIIP
A type of infusion pump inserted in the body. The pump, which may be programmable or nonprogrammable, is placed in a subcutaneous pocket and is connected to a dedicated catheter leading to the appropriate compartment or site.
A pump to administer fluids into an artery, vein, or enteral tube, beneficial in overcoming arterial resistance, controlling the rate of the fluid and drug administration, or administering thick solutions. The pump can be programmed to set the rate of administration depending on the patient's needs. See: ; electronic infusion device
Synonym: intravenous infusion pump
See: Infusion Pump
A small battery-driven pump that delivers insulin subcutaneously into the abdominal wall. The pump can be programmed to deliver varying doses of insulin as a patient's need for insulin changes during the day (e.g., before exercise or meals, when physical or psychological levels of stress change). See: illustration
intra-aortic balloon pumpIntra-aortic balloon counterpulsation.
intravenous infusion pumpInfusion pump.
A pneumatic compression device for application to an edematous limb. It works best when combined with elevation of the limb and manual massage. The device, which may be single-chambered or multichambered, is designed to provide calibrated, sequential pressure to the extremity. This action “milks” edema fluid from the extremity. It is essential that the device be used in the early phase of the development of lymphedema. If the affected lymph vessels develop fibrotic changes (i.e., scar tissue), then pneumatic compression devices are of questionable benefit.
An enzyme located in the parietal cell of the stomach that excretes hydrogen ions in exchange for potassium ions. The formal name of the proton pump is hydrogen/potassium adenosine triphosphate (H+
Gastric acids produced by the proton pump aid chemical digestion of foods. Some diseases and conditions are worsened by acid in the stomach (e.g., peptic ulcers, acid reflux disease). Drugs that inhibit the proton pump (proton pump inhibitors such as omeprazole) are used to treat these illnesses.
Those abdominal and thoracic structures that contribute to the expansion and contraction of the lungs. Movement of the chest and abdomen alters central pressures during inspiration and expiration. During inspiration, decreases in intrathoracic pressure draw air into the trachea, bronchi, and lungs and draw blood into the vena cava and right atrium of the heart. During expiration, intrathoracic pressures rise, and air is forced out of the lungs.
The active transport mechanism that moves sodium ions across a membrane to their area of greater concentration. In neurons and muscle cells, this is outside the cell. In many cells, the sodium pump is linked with the potassium pump that transports potassium ions into the cell, also against a concentration gradient, and may be called the sodium-potassium pump. In neurons and muscle fibers, this pump maintains the polarization of the membrane. See: Sodium-Potassium Pump
A programmable infusion device used to control and administer intravenous drugs and limit medication administration errors. Its software may include some or all of the following features: infusion rate programming; dosing limit lockout features; configurations for specific hospital areas (pediatric dosing versus adult or intensive care unit dosing); surgical or anesthetic drug libraries; controls for patient-controlled analgesia; and alert features (alarms or messages that notify users of possible medication errors).
A colloquial term for gastric lavage.
The negative pressure in the chest during inspiration that pulls venous blood into the vena cava and right side of the heart so that it can circulate to the lungs.
venous plexus foot pump
A device that alternates between applying pressure and no pressure on the sole of the foot. The change in pressure allows venous blood vessels to alternately fill and then empty, thus imitating the effects of walking on the veins of the lower extremities. The pump is used to prevent deep vein thromboses (DVTs) in patients at high risk because of a previous history of DVTs, hypercoagulable states, or prolonged bedrest.