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35 terms

Chapter 6 Biomedical Science

STUDY
PLAY
Megabyte
1,000 kilobytes
Gigabyte
1000 megabytes
Applications of computers in surgery
scheduling surgical patients, surgeon's preference card, patient charts, surgical records, sterile processing, robotics
W.T. Bovie
1920's physicist who developed the first spark gap tube generator which culminated in the ESU generator now commonly used in surgery
electron theory
principles that govern the behavior of tiny particles known as electrons
matter
anything that has mass and occupies space
nucleus
center of an atom that contains protons and neutrons
protons
positively charged electric particles
neutrons
neutral particles
electrons
negatively charged particles that revolve around the nucleus in shells or orbits
free electrons
outer electrons whose movement creates electric current
electricity
describes the free electrons moving or flowing from the ring of one atom to another
conductors
materials that allow the flow of free electrons
copper
most commonly used conductor
insulators
materials that inhibit the flow of electrons
OR humidity
should be between 50 and 55% but not less than 45%
electrical charges
can be negative or positive and are defined as too many or too few electrons on an atom respectively
electric current
movement of the electrical charge
magnetism
can generate an electric current
electricity
used to generate magnetism
volt
defines electrical potential
voltage
the potential energy of electrons at any given time between two points
circuit
the path that electricity travels from the energy source to a device and back to the energy source
components of a circuit
source of power, conductor, load, and switch
current is measured
in amperes or amps
current
the flow of electric charge or the rate of flow of electrons
Ohm's law
scientific law that pertains to electricity; mathematically explains the relationship between voltage, current (amps), and resistance
power
the rate at which work is done
hot wire
the wire that supplies electrical current in a circuit to a device
neutral wire
or ground wire; carries electrical current in a circuit away from a device
electrosurgery
the application of electrical current through tissue to coagulate or cut tissue
ESU circuit
generator, active electrode, patient, inactive electrode
active electrode
delivers the electric current to the surgical site through the tissue
monopolar mode
the most commonly used mode on the ESU
bipolar mode
used only for coagulation not cutting