pump oxygenator

pump oxygenator

Etymology: ME, pumpe + Gk, oxys, sharp, genein, to produce

a device that pumps oxygenated blood through the body during cardiopulmonary surgery.

---

oxygenator [ok´sĭ-jĕ-na″tor]

an apparatus by which oxygen is introduced into the blood during circulation outside the body, as during open-heart surgery. See also heart-lung machine.

bubble oxygenator a device in which pure oxygen is bubbled through an extracorporeal reservoir of blood, either directly or through a filter.

film oxygenator a device, encased in a container of oxygen, that makes possible reduction of a thin film of blood to facilitate the exchange of gases.

pump oxygenator heart-lung machine.

rotating disk oxygenator a type of film oxygenator in which a series of parallel disks rotate through an extracorporeal pool of venous blood in a container of oxygen; gaseous exchange occurs between the thin film of blood on the exposed surface of the disks and the oxygen in the container.

screen oxygenator a type of film oxygenator in which the venous blood is passed over a series of screens in a container of oxygen, gaseous exchange taking place in the thin film of blood produced on the screens.

---

pump

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

2. to draw or force liquids or gases.

3. a mechanism or structure that mediates active transport of ions or molecules across a biological membrane.

---

blood pump

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

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.

infusion pump

an electronic device used to control the administration of intravenous fluids in very small amounts and at a carefully regulated rate over long periods.

pump oxygenator

heart-lung machine. See extracorporeal circulatory support unit.

sodium pump, sodium-potassium pump

the mechanism of active transport driven by hydrolysis of ATP, by which sodium (Na+) is extruded from a cell and potassium (K+) is brought in, so as to maintain the low concentration of Na+ and the high concentration of K+ within the cell with respect to the surrounding medium. See also na+,k+-atpase.

stomach pump

an apparatus used to remove material from the stomach. It consists of a rubber stomach tube to which a bulb syringe is attached. The tube is inserted into the mouth or nose and passed down the esophagus into the stomach. Suction from the syringe brings the contents of the stomach up through the tube. For cattle and horses a reversible metal pump adapted from a yachting bilge pump is most suitable. In small animals, gravity is the usual method of moving fluid into and out of the stomach during lavage.