NURS 640 Week 1 QUESTIONS AND ANSWERS
Isometric Tension
his is the amount of tension a muscle fiber can produce at a fixed length
Positive Inotrope
Any factor that can increase isometric tension increases cardiac contractility
What temperature defines hypothermia?
Anything less than 36 degrees Celsius.
What are the four routes of heat loss? Name them in the order from greatest degree of heat
loss to least.
Radiation, convection, conduction, and evaporation
Conduction versus convection?
Conduction involves molecules transferring kinetic energy to one another through
collisions. Convection occurs when hot air rises, allowing cooler air to come in and be
heated (From Khan Academy)
What are five drugs that have been used successfully to prevent shivering?
Demerol, clonidine, ketanserin, magnesium sulfate, and dexmedetomidine
Explain radiant heat loss. Where does it occur to the greatest degree in the human body?
Radiant heat loss is the transfer of electromagnetic radiation from the body to the cooler ambient
environment. Blood carries heat from the body's core to the skin where it is emitted as infrared
, radiation. It occurs to the highest degree in the head because of the high percentage of blood flow
it receives.
How does radiant heat loss occur?
Radiant heat loss is the transfer of heat from the body into the cooler operating room.
What is evaporative heat loss?
Evaporative heat loss occurs when moisture from the skin, exposed organs, and the respiratory
tract turns from the liquid to gas phase. This process requires energy and the majority of the
energy comes from our bodies. As a result of the loss of energy, our body loses heat as well.
How does evaporative heat loss occur?
Evaporative heat loss occurs when liquids on the surface of the body evaporate into the air.
What is conductive heat loss?
Conduction is the transfer of heat energy from one object to another through physical contact.
This is the method of heat loss that occurs when a patient is placed on a cold operating room
table. Heat from the patient is lost to the colder table surface.
What is convective heat loss?
Convection is the generation of air currents by heat. As heat is emitted, it rises in a current and is
replaced by cooler air.
How do convective and conductive heat loss occur?
Convective heat loss occurs as cooler air moves across the body's surface and conductive heat
loss occurs when the body is in contact with a cooler surface such as an operating room table.
Isometric Tension
his is the amount of tension a muscle fiber can produce at a fixed length
Positive Inotrope
Any factor that can increase isometric tension increases cardiac contractility
What temperature defines hypothermia?
Anything less than 36 degrees Celsius.
What are the four routes of heat loss? Name them in the order from greatest degree of heat
loss to least.
Radiation, convection, conduction, and evaporation
Conduction versus convection?
Conduction involves molecules transferring kinetic energy to one another through
collisions. Convection occurs when hot air rises, allowing cooler air to come in and be
heated (From Khan Academy)
What are five drugs that have been used successfully to prevent shivering?
Demerol, clonidine, ketanserin, magnesium sulfate, and dexmedetomidine
Explain radiant heat loss. Where does it occur to the greatest degree in the human body?
Radiant heat loss is the transfer of electromagnetic radiation from the body to the cooler ambient
environment. Blood carries heat from the body's core to the skin where it is emitted as infrared
, radiation. It occurs to the highest degree in the head because of the high percentage of blood flow
it receives.
How does radiant heat loss occur?
Radiant heat loss is the transfer of heat from the body into the cooler operating room.
What is evaporative heat loss?
Evaporative heat loss occurs when moisture from the skin, exposed organs, and the respiratory
tract turns from the liquid to gas phase. This process requires energy and the majority of the
energy comes from our bodies. As a result of the loss of energy, our body loses heat as well.
How does evaporative heat loss occur?
Evaporative heat loss occurs when liquids on the surface of the body evaporate into the air.
What is conductive heat loss?
Conduction is the transfer of heat energy from one object to another through physical contact.
This is the method of heat loss that occurs when a patient is placed on a cold operating room
table. Heat from the patient is lost to the colder table surface.
What is convective heat loss?
Convection is the generation of air currents by heat. As heat is emitted, it rises in a current and is
replaced by cooler air.
How do convective and conductive heat loss occur?
Convective heat loss occurs as cooler air moves across the body's surface and conductive heat
loss occurs when the body is in contact with a cooler surface such as an operating room table.
