Chapter 29 Vital Signs Flashcards
Vital Signs:
indicators of health status, measures effectiveness of circulatory, respiratory, neural, endocrine body functions
body temperature =
heat produced -heat lost
core temperature:
middle body
relatively constant - temp of deep tissues
thermoregulation:
regulate the balance between heat lost and heat produced
BMR:
-Basal metabolic rate: depends on body surface area
Nonshivering thermogenesis:
occurs primarily in neonates (cannot shiver)
Diaphoresis:
visible perspiration primarily occurring on the forehead and upper thorax, although you can see it in other places on the body
Factors affecting body temperature:
age, exercise, hormone level, circadian rhythm, stress, environment, temperature alteration
Temperature Alterations:
fever, hyperthermia, heatstroke, heat exhaustion, hypothermia
fever
infection, based on several temperature readings at different times of the day
pyrexia:
occurs because heat-loss mechanisms are unable to keep pace with excessive heat production, resulting in an abnormal rise in body temperature
Pyrogens
bacteria/viruses elevate body temperature
febrile
pertaining to or characterized by an elevated body temperature
afebrile
when the fever “breaks” the patient
fever of unknown origin (FUO)
refers to fever with an undetermined cause
hyperthermia:
an elevated body temp related to the inability of the body to promote heat loss or reduce heat production
Malignant hyperthermia;
hereditary condition of uncontrolled heat production that occurs when susceptible people receive certain anesthetic drugs
Heatstroke:
body temp of 40 C—prolonged exposure to the sun or high environmental temp
Heat exhaustion:
occurs when profuse diaphoresis results in excess water and electrolyte loss
Hypothermia
classified by core temp measurements – heat loss during prolonged exposure to cold overwhelms the ability of the body to produce heat
thermometers:
celsius and fahrenheit
Antipyretics:
medications that reduce fever
Cardiac output:
the volume of blood pumped by the heart during 1 minute
heart rate for
infant: 120-160
toddler: 90-140
preschooler: 80-110
school-aged children: 75-100
adolescent: 60-90
adult: 60-100
tachycardia
abnormally elevated HR
bradycardia
slow HR
pulse deficit
contraction of the heart that fails to transmit a pulse wave to the peripheral pulse
dysrhythmia
interval interrupted by an early or late beat or a missed beat indicates an abnormal rhythm
What vital signs are taken?
Main 4: Temperature, pulse, respiratory rate, blood pressure
Sometimes 5th sign is: Pain
Oxygen saturation also frequently measured (oxygenate organs and how well tissues are)
Vital signs are used to:
Monitor patient’s condition
Identify problems
Evaluate response to intervention
Guidelines for measuring vitals include:
Ensure that equipment is functional and is appropriate for the size and age of the patient.
Appropriately delegate measurement - have to follow up on them.
Be able to understand and interpret values.
Know the patient’s usual range of vital signs.
Determine the patient’s medical history, therapies, and prescribed medications.
Control or minimize environmental factors that affect vital signs.