18 Questions
What is the main advantage of a thermistor over a platinum resistance thermometer?
Small size and different shapes
Which heat loss mechanism is responsible for carrying away 30% of heat through the layer adjacent to the surface?
Convection
Which heat loss method involves emission of radiation carrying heat energy away from a hot object?
Radiation
What is the primary factor determining the effectiveness of evaporation as a heat loss mechanism?
Water vapor pressure
Why is a glass thermistor considered rigid and prone to breakage?
Material composition
Which method of heat loss accounts for 10% of total human body heat loss?
Respiration
What percentage of heat is lost through convection in the human body?
30%
Which property makes a thermistor more accurate for remote and continuous reading?
Size and shape versatility
What is the definition of absolute humidity?
The weight of water vapor in 1 litre of gas
What is the primary function of a passive humidifier like HME (artificial nose)?
To heat and warm the inspired dry gas
Which method is used to measure humidity in anesthesia settings using a capsule containing a filter with hygroscopic material?
Wet and dry bulb hygrometer
What is the efficiency percentage of passive humidifiers like HME (artificial nose) in maintaining humidity?
70%
Why is humidification important during anesthesia according to the text?
To prevent adverse changes in the upper airways and possible pulmonary compromise
What is the primary disadvantage of using a plastic material for a pediatric patient cap in terms of dead space and rebreathing?
Elevates dead space volume
How does excess water and secretions in the cap affect the airway?
Leads to airway obstruction
Why are active humidifiers preferred over passive ones in terms of preserving moisture and heat?
Improved moisture retention
How do heated humidifiers with thermostatically controlled elements improve efficiency over unheated humidifiers?
Increase gas vapor capacity
What is the main purpose of a nebulizer when administering medication?
Delivering medication to the lungs
Learn about the indications and contraindications of arterial catheterization, including when it is necessary for frequent blood gas measurements, cardiac output monitoring, and situations where noninvasive methods are unreliable. Avoid this procedure in arteries without adequate collateral blood flow and smaller end-arteries with insufficient collateral blood flow.
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