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Pathophysiology > Alterations In Temperature Regulation > Flashcards

Alterations In Temperature Regulation Flashcards

1
Q

Hypothalamus

A
  • thermal control center

- received and released signals of heat

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2
Q

Vasodilation

A
  • dilates blood vessels, which decrease blood pressure

- heat loss

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3
Q

Vasoconstriction

A
  • constricts blood vessels, which increases blood pressure

- heat gain

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4
Q

Shivering

A

-heat gain

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5
Q

Conduction

A
  • direct transfer of heat through contact
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6
Q

Evaporation

A
  • loss of heat through conversion of water to gas
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7
Q

Radiation

A
  • emission of electromagnetic radiation

- heat loss

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8
Q

Thermogenesis

A

Process of heat production in organisms

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9
Q

Convection

A

Heat transfer through the circulation of air currents

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10
Q

Pyrexia

A

Raised body temperature (aka fever)

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11
Q

Pyrogens

A

Chemicals that affect the hypothalamus which regulates body temperature

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12
Q

Thermostatic set point also increased by?

A
  • shivering
  • sweating
  • vasoconstriction
  • vasodilation
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13
Q

4 Stages of Fever

A
  1. Prodomal
  2. Chill
  3. Flush
  4. Defervescence
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14
Q

Prodomal

A

-mild headache, fatigue, malaise

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15
Q

Chill

A

-uncomfortable sensation; cold and shaking

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16
Q

Flush

A

-skin warm and flushed

17
Q

Defervescence

A

Initiation of sweating (getting better)

18
Q

4 Patterns of Fever

A
  1. Intermittent
  2. Remittent
  3. Sustained or Continuous
  4. Recurrent or Relapsing
19
Q

Intermittent

A

Temperature returns to normal at least once every 24 hours

20
Q

Remittent

A

Temperature does not return to normal and varies in either direction

21
Q

Sustained or Continuous

A

Temperature remains above normal with minimal variation

22
Q

Recurrent or Relapsing

A

Episodes of fever lasting as long as several days with one or more days of normal temperature

23
Q

Fever & Heart Rate

A

No increase in HR may indicate:
- legionnaire disease, drug fever

Higher than expected increase in HR may indicate:
- hyperthyroidism, pulmonary emboli

24
Q

Fever

A

Alteration in temperature due to pyrogens

25
Q

Hyperthermia

A

Increase in temperature that occurs when the body absorbs/produces more heat than it can dissipate

26
Q

Orthostatic Hypotension

A

Form of low blood pressure that happens when standing up (too fast, light headed)

27
Q

Hypertension

A

High blood pressure

Pathophysiology (10 decks)

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