Chapter 19: Vital Signs; week 4 Flashcards
Concept of Vital Signs
-suggests assessment of vital or critical physiological functions
-variations reflect a persons state of health and/or functional ability of the body systems
1. Temperature
2. pulse
3. respirations
4. BP
also,
5. pain
6. pulse oximetry
Normal Findings for Adults: Pulse
Normal: 60-100 beats/min
Average: 80 beats/min
Normal Findings for Adults: Respirations
Normal Range: 12-20 breaths/min
Normal Findings for Adults: BP
Normal Range: 110-119 mmhg systolic
60-80 mmhg diastolic
Prehypertensive: 120-139 mmhg systolic
80-89 mmhg diastolic
Average: 120/80
Core Temperature
adults normal internal temperature
Ranges: 97’ F to 100.8’ F
-typically 1 to 2 degrees higher than surface (skin) temperature
Adult Normal Finding: Temperature
Oral: 98’F
Rectal: 98.6’F (insert 1-1.5 inches)
- rectal + tympanic are for core temperatures
- oral + axillary are for surface temperature
Thermoregulation
- maintaining a stable temperature
- to keep the body temperature constant the body must balance heat production and heat loss
- balance is controlled by the hypothalamus; located between the cerebral hemispheres of the brain
Hypothalamus
- balance heat production + loss (thermoregulation)
- recognizes small changes in body temperature that are sent to it by sensory receptors in the skin (like a thermostat)
- heat production primarily caused by metabolism
- heat loss occurs through skin
Afebrile
without fever, normal body temperature
Febrile
(pyrexia, or fever)
-body temperature above normal
-usually caused by infection or response to tissue injury
>101’F (greater than)
>100’F (greater than)
-occurs in response to pyrogens (e.g bacteria)
-pyrogens induce secretion of substances (prostaglandins) that reset the hypothalmic thermostat at a higher temperature
Hyperthermia
core body temperature well above normal usually caused by exposure to extreme heat
103’F to 106’F
Hyperpyrexia
fever
>105.8’F
Hypothermia
core body temperature well below normal usually caused by exposure to extreme cold <95'F -shivering -cyanosis of lips and fingers -poor coordination -feels cold, then pain in extremities
Diaphoresis
visible perspiration which promotes heat loss and is common when fever breaks (sweating)
Sequence for taking BP
- Clean stethoscope with 70% alcohol
- Position client
- Fully expose patients arm
- Place cuff around clients bare upper arm
- Place stethoscope earpieces in ear
- Palpate brachial artery
- Inflate cuff
- Places stethoscope over brachial artery
- Deflates slowly
- Auscultates Korotkoff sounds
- Remove cuff
- Document findings
What you should look for with Respiratory Rate?
- Rate
- Rhythm
- Depth
- Effort
Decreasing Body Temperature
heat sensors in the hypothalamus are stimulated, they send out impulses to reduce body temperature
-activates compensatory mechanisms:
>peripheral vasodilation
>sweating
>inhibition of heat production
-Vasodilation (Increase diameter of blood vessels) diverts core-warmed blood to the body surface, where heat can be transferred to the surrounding environment
Increasing Body Temperature
sensors in the hypothalamus detect cold, send out impulses to increase heat production + reduce heat loss
-Produce heat:
> shivering
> release epinephrine, which increases metabolism
-Reduce Heat Loss:
> vasoconstriction (narrowing of blood vessels) converts heat by shunting blood away from the periphery (where heat is lost) to the core of the body (blood is warmed)
-piloerection: hairs standing on end
Pulse
the concept of perfusion refers to the continuous supply of oxygenated blood to all body cells
-Pulse–> rhythmic expansion of an artery produced when a bolus of oxygenated blood is forced into it by contraction of the heart
Body Produce and Regulate Pulse
the pulse “wave” begins when the left ventricle contracts and ends when the ventricle relaxes
-each contraction forces blood into the already-filled aorta, causing increased pressure within the arterial system
>Systole: peak of the wave, contraction of heart
>Diastole: trough or resting phase of heart
Characteristics of Pulse
- Rate: 60 to 100 bpm
- Rhythm: regular or irregular
- Strength: amplitude and quality; weak, thready, or strong and bounding
- Equality: equal on both sides of the body
Sites to Assess Pulse
- Apical: apex of heart (between 5th and 6th ICS)
- Carotid: between mid-line and side of neck
- Brachial: Medially in antecubital space (use with BP)
- Radial: laterally on anterior wrist
- Femoral: groin fold
- Popliteal: behind the knee
- Posterior Tibial: above ankle bone
- Dorsalis Pedis: foot
Pulse Quality (Strength)
assessed by determining the pulse volume and bilateral (both sides) equality of pulse
0- absent: cannot be felt
1- weak: (thready); barely felt, easily obliterated by pressing with the fingers
2- normal: easily palpated, not weak or bounding
3- full:easily felt with little pressure; not easily obliterated
4- bounding: forceful, obliterated by strong finger pressure