1. A patient has a head injury and damages the hypothalamus. Which vital sign will the nurse monitor most closely? a. Pulse b. Respirations c. Temperature d. Blood pressure - ANS: C Disease or trauma to the hypothalamus or the spinal cord, which carries hypothalamic messages, causes serious alterations in temperature control. The hypothalamus does not control pulse, respirations, or blood pressure. 2. A patient presents with heatstroke. The nurse uses cool packs, cooling blanket, and a fan. Which technique is the nurse using when the fan produces heat loss? a. Radiation b. Conduction c. Convection d. Evaporation - ANS: C Convection is the transfer of heat away from the body by air movement. Conduction is the transfer of heat from one object to another with direct contact. Radiation is the transfer of heat from the surface of one object to the surface of another without direct contact between the two. Evaporation is the transfer of heat energy when a liquid is changed to a gas. 3. The patient has a temperature of 105.2° F. The nurse is attempting to lower temperature by providing tepid sponge baths and placing cool compresses in strategic body locations. Which technique is the nurse using to lower the patient's temperature? a. Radiation b. Conduction c. Convection d. Evaporation - ANS: B Applying an ice pack or bathing a patient with a cool cloth increases conductive heat loss because of the direct contact. Radiation is the transfer of heat from the surface of one object to the surface of another without direct contact between the two. Evaporation is the transfer of heat energy when a liquid is changed to a gas. Convection is the transfer of heat away from the body by air movement. 4. A nurse is focusing on temperature regulation of newborns and infants. Which action will the nurse take? a. Apply just a diaper. b. Double the clothing. c. Place a cap on their heads. d. Increase room temperature to 90 degrees. - ANS: C A newborn loses up to 30% of body heat through the head and therefore needs to wear a cap to prevent heat loss. Temperature control mechanisms in newborns are immature and respond drastically to changes in the environment; do not increase the room temperature to 90 degrees. Take extra care to protect newborns from environmental temperatures. Provide adequate clothing; do not double the clothing or apply just a diaper. 5. The nurse is working the night shift on a surgical unit and is making 4:00 AM rounds. The nurse notices that the patient's temperature is 96.8° F (36° C), whereas at 4:00 PM the preceding day, it was 98.6° F (37° C). What should the nurse do? a. Call the health care provider immediately to report a possible infection. b. Administer medication to lower the temperature further. c. Provide another blanket to conserve body temperature. d. Realize that this is a normal temperature variation. - ANS: D Body temperature normally changes 0.5° to 1° C (0.9° to 1.8° F) during a 24-hour period and is usually lowest between 1:00 and 4:00 AM, with a maximum temperature at 4:00 PM, making this variation normal for the time of day. Unless the patient reports being cold, there is no physiological need for providing an extra blanket or medication to lower the body temperature further. There is also no need to call a health care provider to report a normal temperature variation. 6. The nurse is caring for a patient who has a temperature reading of 100.4° F (38° C). The patient's last two temperature readings were 98.6° F (37° C) and 96.8° F (36° C). Which action will the nurse take? a. Wait 30 minutes and recheck the patient's temperature. b. Assume that the patient has an infection and order blood cultures. c. Encourage the patient to move around to increase muscular activity. d. Be aware that temperatures this high are harmful and affect patient safety. - ANS: A Waiting 30 minutes and rechecking the patient's temperature would be the most appropriate action in this case. A fever is usually not harmful if it stays below 102.2° F (39° C), and a single temperature reading does not always indicate a fever. In addition to physical signs and symptoms of infection, a fever determination is based on several temperature readings at different times of the day compared with the usual value for that person at that time. Nurses should base actions on knowledge, not on assumptions. Encouraging the patient to increase muscular activity will cause heat production to increase up to 50 times normal. The temperature has decreased and a symptom of infection would be an increase in temperature. 7. A patient is pyrexic. Which piece of equipment will the nurse obtain to monitor this condition? a. Stethoscope b. Thermometer c. Blood pressure cuff d. Sphygmomanometer - ANS: B Pyrexia, or fever, occurs because heat loss mechanisms are unable to keep pace with excess heat production, resulting in an abnormal rise in body temperature; therefore, a thermometer is needed. A stethoscope is not used to take a temperature but can be used for apical pulse and blood pressure. A pulse oximeter is used to determine oxygen content in the blood. A sphygmomanometer and blood pressure cuff is used to determine blood pressure and will be used for blood pressure problems. 8. The nurse is caring for a patient who has an elevated temperature. Which principle will the nurse consider when planning care for this patient? a. Hyperthermia and fever are the same thing. b. Hyperthermia is an upward shift in the set point. c. Hyperthermia occurs when the body cannot reduce heat production. d. Hyperthermia results from a reduction in thermoregulatory mechanisms. - ANS: C An elevated body temperature related to the inability of the body to promote heat loss or reduce heat production is hyperthermia. Whereas fever is an upward shift in the set point, hyperthermia results from an overload of the thermoregulatory mechanisms of the body. 9. The patient with heart failure is restless with a temperature of 102.2° F (39° C). Which action will the nurse take? a. Place the patient on oxygen. b. Encourage the patient to cough.