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ST1 > Week 15 Terms > Flashcards

Week 15 Terms Flashcards

1
Q

Ablation

A

Complete destruction of tissue

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2
Q

Active electrode

A

Point of the electrosurgical instrument that delivers current to tissue

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3
Q

Active electrode monitoring (AEM)

A

Electrosurgical instrument system that monitors the impedance of instruments and stops the flow of electricity when it reaches a critical level

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4
Q

Alternating current (AC)

A

Electrical current that changes directions and transmits high-voltage electricity

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5
Q

Amplification

A

Phenomenon of increasing wave height by lining up the peaks and troughs of individual waves

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6
Q

Argon

A

Inert gas used in electrosx to direct and shroud the electrical current

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7
Q

Bipolar circuit

A

Electrosurgical circuit in which current travels from the power unit through an instrument containing two opposite poles in contact with the tissue and then returns directly to the energy source

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8
Q

Blended mode

A

Combination of intermediate frequency and intermediate wave intervals

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9
Q

Carbon dioxide

A

Inert gas used as a lasing medium during laser sx

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10
Q

Cauterization

A

Use of a hot object to burn tissue to achieve coagulation

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11
Q

Circuit

A

The flow of electricity through a conductive medium

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12
Q

Coagulum

A

Sticky, semiliquid substance that forms when tissue is altered by electrical or ultrasonic energy

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13
Q

Coherency

A

Quality of laser light in which all light waves are lined up with trough and peaks matching

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14
Q

Conductive

A

Quality of a material to give up electrons easily and thus transmit electrical current

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15
Q

Continuous wave lasers

A

Lasers that emit the laser light continuously rather than in pulses

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16
Q

Cryoablation

A

Method of tissue destruction in which a probe is inserted into a tumor or tissue mass. High-pressure argon gas is injected into the probe.

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17
Q

Cryosurgery

A

Use of extremely low temperature to destroy diseased tissue

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18
Q

Current

A

Flow of electricity

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19
Q

Cavitron ultrasonic surgical aspirator (CUSA)

A

Instrument that destroys tumors through the use of ultrasound (high frequency sound waves)

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20
Q

Cutting mode

A

Use of high voltage and relatively low frequency to cut through tissue

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21
Q

Desiccation

A

Removal of water from tissue, causing it to die

22
Q

Direct coupling

A

Transfer of electrical current from an active electrode to another conductive instrument by accident or as part of the electrosurgical process

23
Q

Direct current (DC)

A

Type of low-voltage current generated by battery

24
Q

Dispersive electrode

A

Component of the electrosurgical circuit that spreads current at the point where it exists the body and thus prevents injury

25
Q

Duty cycle

A

Duration of current flow; can intermittently be applied to produce the desired effect on tissue

26
Q

Electrosurgery

A

Direct use of electricity to cut and coagulate tissue

27
Q

Electrosurgical unit (ESU)

A

Power generator and control source in the electrosurgical system

28
Q

Electrosurgical vessel sealing

A

Type of bipolar electrosurgery in which tissue is welded together using low voltage, low temperature, and a high-frequency current

29
Q

Eschar

A

Charred and burned tissue created by a high-voltage current

30
Q

Excimer

A

Type of lasing energy that is created when electrons are removed from the lasing medium

31
Q

Excitation source

A

Energy that causes the atoms of a lasing medium (gas or solid) to vibrate

32
Q

Frequency

A

Periodicity of electromagnetic waves

33
Q

Fulguration

A

Process of tissue surface destruction used in electrosx

34
Q

Grounding pad

A

Patient return electrode

35
Q

Holmium:YAG

A

Solid crystal lasing medium that penetrates a wide variety of substances

36
Q

Impedance

A

Constriction of electrical current by a nonconductive material or an area of high density. Results in the transformation of electricity into thermal energy

37
Q

Inactive electrode

A

Patient return electrode

38
Q

Laser

A

Light amplification by stimulated emission of radiation

39
Q

Laser head

A

Component of the laser system that holds the lasing medium

40
Q

Lasing medium

A

Solid or gas that is sensitive to atomic excitation by an energy source, which creates intense laser light and energy

41
Q

Lateral heat

A

Unintentional heating of tissue outside the direct area of electrosurgical application; aka Thermal spread

42
Q

Monopolar circuit

A

Continuous path of electricity that flows from ESU to active electrode, then through patient and return electrode, then back to ESU

43
Q

Nonconductive

A

Quality of a substance that resists the transfer of electrons and therefore electrical current

44
Q

Phacoemulsification

A

Destruction of cataracts using ultrasound technology

45
Q

Radiofrequency

A

Electromagnetic energy in which frequency is in the area of radiotransmission

46
Q

Radiofrequency ablation (RFA)

A

Use of radiofrequency waves to destroy a tissue mass or surface

47
Q

Resistance

A

Restriction of electron flow in a direct current circuit

48
Q

Smoke plume

A

Toxic smoke emitted by tissue during electrosx and laser sx

49
Q

Spray coagulation

A

Fulguration

50
Q

Ultrasonic energy

A

High frequency energy created by vibration or excitation of molecules; destroys tissue by breaking molecular bonds

ST1 (15 decks)

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