Fluke-biomedical MPS450 User Manual download pdf (Page 125)

Glossary

Introduction C

C-3

Table C-1. Glossary (cont.)

Term Definition

MILLIVOLT One-thousandth of a volt.

MYOCARDIUM The thick muscular layer of the heart, located between the

endocardium at the inside and the epicardium at the outside walls of

the heart.

NANOMETER One-billionth (109) of a meter.

NANOSECOND One billionth (109) of a second (one thousand-millionth of a second).

Electricity travels approximately one foot per nanosecond.

NONINVASIVE Not tending to spread; especially, not tending to invade healthy tissue.

OHM A unit of electrical resistance equal to that of a conductor in which a

current of one

ampere is produced by a potential of one volt across

its terminals.

PAP Pulmonary arterial pressure.

PATIENT LEADS Cables that connect a patient directly with the monitor. Sometimes

called applied parts.

PCWP Pulmonary capillary wedge pressure. Also known as PAW.

PULSE The rhythmical throbbing of arteries produced by regular

contractions of the heart.

PURKINJE NETWORK The dense collection of Purkinje fibers, which are dispersed throughout

the

myocardium and which represent the terminal portion of the

heart's electrical conduction system.

PVCS Premature ventricular contractions.

QRS COMPLEX The part of the P-QRS-T wave that records ventricular depolarization

and contraction.

RESISTANCE The opposition to electric current that is characteristic of a medium,

substance, or circuit element.

RS-232 A method for connecting peripheral devices to computers using either a

25-pin connector or a 9-pin connector. There are two types of RS-232

interfaces: the data terminal equipment interface (DTE) and the data

communication equipment interface (DCE). Personal computers are

DTE devices, and peripherals (printers, mice, modems, the MPS450,

etc.) are DCE devices. SEE

serial port.

SA NODE The dominant pacemaker site in the heart, responsible for setting the

heart rate. Positioned in the right

atrium near the inlet of the superior

vena cava.

SERIAL PORT An asynchronous COMmunication port/address to which a

peripheral—such as a printer, a mouse or the MPS450—is connected

to a computer or other device. SEE

RS-232.

SWAN-GANZ A soft, balloon-tipped catheter used for measuring blood pressure and

cardiac output. The catheter is guided by blood flow into the pulmonary

artery. A monitor near the tip of the catheter detects PAP, PCWP,

and

thermodilution.

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