Electrical Flow and Injury in Medical Settings
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Questions and Answers

What is the unit of current in the context of electricity?

  • Ampere (correct)
  • Coulomb
  • Ohm
  • Volt
  • Which law describes the electrostatic attraction or repulsion between charges?

  • Boyle's Law
  • Ohm’s Law
  • Newton's Law
  • Coulomb’s Law (correct)
  • What does Ohm's Law state?

  • $V=I\cdot R$ (correct)
  • $I=V/R$
  • $R=V/I$
  • $P=IV$
  • What does resistance measure in an electrical circuit?

    <p>Opposition to current flow</p> Signup and view all the answers

    What type of current is used for cutting in Electrosurgery?

    <p>Continuous, low voltage, high density</p> Signup and view all the answers

    What is the frequency range at which the Electrosurgery Device operates?

    <p>500,000 - 1,000,000 Hz</p> Signup and view all the answers

    What is the formula to calculate the heat produced in Electrosurgery?

    <p>$Heat Produced = \frac{Current^2}{Area}$</p> Signup and view all the answers

    What is the purpose of a dispersive pad in Monopolar Electrosurgery?

    <p>To guide energy away from implants and devices</p> Signup and view all the answers

    In Bipolar Electrosurgery, where does the current pass between?

    <p>Two forcep electrodes</p> Signup and view all the answers

    What should be avoided during dispersion pad placement in Electrosurgery?

    <p>Placement on bony prominences, near implants/prosthesis, hairy areas, scarred/discolored tissue, or poorly perfused areas</p> Signup and view all the answers

    What is recommended as a last resort to reduce electromagnetic interference in Electrosurgery?

    <p>Short, intermittent, and irregular monopolar bursts at lowest energy setting possible</p> Signup and view all the answers

    What type of interference can be caused by the high frequency of an Electrosurgery Device?

    <p>Interference with other electrical equipment (EKG, pulse oximeters, electrical implants, computers)</p> Signup and view all the answers

    What is the formula for calculating electrical power?

    <p>P=VxI</p> Signup and view all the answers

    Which type of electricity has reversed polarity periodically?

    <p>Alternating current (AC)</p> Signup and view all the answers

    What measures resistance created by leakage and unintentional grounding of lines in medical settings?

    <p>Line Isolation Monitor (LIM)</p> Signup and view all the answers

    What are the three major mechanisms of electrical-induced injury?

    <p>Electroporation, conversion of electrical energy into thermal energy, and mechanical injury</p> Signup and view all the answers

    What type of shock involves large amounts of current conducted through the patient's skin and tissues?

    <p>Macroshock</p> Signup and view all the answers

    What affects the amount of current delivered in an electrical shock?

    <p>Skin impedance, moisture, and cannulation</p> Signup and view all the answers

    What are the types of electrical circuits mentioned in the text?

    <p>Grounded circuit, ungrounded circuit, isolation transformer circuit</p> Signup and view all the answers

    What measures set frequencies of AC electricity?

    <p>Frequency meter</p> Signup and view all the answers

    Study Notes

    Electrical Flow and Injury in Medical Settings

    • Electrical flow is influenced by material properties, with insulators opposing the flow of electric charge and conductors permitting the flow.
    • Electrical flow is delivered as direct current (DC) or alternating current (AC), with AC having reversed polarity periodically.
    • AC electricity is delivered at set frequencies measured in hertz (Hz).
    • Energy expenditure is measured by electrical power, which is calculated as P=VxI (watts = volts x amps).
    • A typical electrical circuit consists of hot and neutral leads connected to a device with a ground lead for dissipation of leaked energy.
    • There are different types of electrical circuits, including grounded, ungrounded, and isolation transformer circuits.
    • A Line Isolation Monitor (LIM) measures resistance created by leakage and unintentional grounding of lines, with alarms set at >5 mA.
    • Electrical shock occurs when a person completes an electrical circuit, and there are two types of shock: macroshock and microshock.
    • Macroshock involves large amounts of current conducted through the patient's skin and tissues, with different effects at varying current intensities.
    • Factors determining the degree of electrical injury include the amount of current, resistance encountered, voltage, current pathway, duration of contact, and type of current.
    • The three major mechanisms of electrical-induced injury are electroporation, conversion of electrical energy into thermal energy, and mechanical injury.
    • Skin impedance, moisture, and cannulation affect the amount of current delivered in a shock, and there are four categories of electrical injury: true, flash, flame, and lightning.

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    SS Electricity - Fall23.pptx

    Description

    Test your knowledge of electrical flow and injury in medical settings with this quiz. Explore topics such as electrical circuits, types of shock, mechanisms of electrical-induced injury, and factors determining the degree of electrical injury.

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