Indications and Contraindications of Arterial Catheterization
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Questions and Answers

What is the main advantage of a thermistor over a platinum resistance thermometer?

  • Sturdiness and durability
  • Linear resistance changes
  • High resistance stability
  • Small size and different shapes (correct)
  • Which heat loss mechanism is responsible for carrying away 30% of heat through the layer adjacent to the surface?

  • Evaporation
  • Convection (correct)
  • Radiation
  • Respiration
  • Which heat loss method involves emission of radiation carrying heat energy away from a hot object?

  • Convection
  • Radiation (correct)
  • Evaporation
  • Conduction
  • What is the primary factor determining the effectiveness of evaporation as a heat loss mechanism?

    <p>Water vapor pressure</p> Signup and view all the answers

    Why is a glass thermistor considered rigid and prone to breakage?

    <p>Material composition</p> Signup and view all the answers

    Which method of heat loss accounts for 10% of total human body heat loss?

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

    What percentage of heat is lost through convection in the human body?

    <p>30%</p> Signup and view all the answers

    Which property makes a thermistor more accurate for remote and continuous reading?

    <p>Size and shape versatility</p> Signup and view all the answers

    What is the definition of absolute humidity?

    <p>The weight of water vapor in 1 litre of gas</p> Signup and view all the answers

    What is the primary function of a passive humidifier like HME (artificial nose)?

    <p>To heat and warm the inspired dry gas</p> Signup and view all the answers

    Which method is used to measure humidity in anesthesia settings using a capsule containing a filter with hygroscopic material?

    <p>Wet and dry bulb hygrometer</p> Signup and view all the answers

    What is the efficiency percentage of passive humidifiers like HME (artificial nose) in maintaining humidity?

    <p>70%</p> Signup and view all the answers

    Why is humidification important during anesthesia according to the text?

    <p>To prevent adverse changes in the upper airways and possible pulmonary compromise</p> Signup and view all the answers

    What is the primary disadvantage of using a plastic material for a pediatric patient cap in terms of dead space and rebreathing?

    <p>Elevates dead space volume</p> Signup and view all the answers

    How does excess water and secretions in the cap affect the airway?

    <p>Leads to airway obstruction</p> Signup and view all the answers

    Why are active humidifiers preferred over passive ones in terms of preserving moisture and heat?

    <p>Improved moisture retention</p> Signup and view all the answers

    How do heated humidifiers with thermostatically controlled elements improve efficiency over unheated humidifiers?

    <p>Increase gas vapor capacity</p> Signup and view all the answers

    What is the main purpose of a nebulizer when administering medication?

    <p>Delivering medication to the lungs</p> Signup and view all the answers

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