PHARMA Flashcards
(80 cards)
carry oxygenated blood away from the heart
- ARTERIES
carry de-oxygenated blood to the hear
- VEINS
carry blood to and from the heart
Veins and Arteries
Veins and arteries consist of three layers
Tunica— ADVENTITIA, MEDI, INTIMA
composed of connective tissue, collagen, and elastic fibers
Tunica adventitia
attaches the vein to whatever other tissue it runs through
Tunica adventitia
Strong, Allows stretch
Tunica adventitia
middle layer consists of smooth muscle and elastic fibres
Tunica media
Supports constriction and dilation of the veins to alter the
blood flow
Tunica media
Provides strength, elasticity and contractile abilities in the
blood vessel walls
Tunica media
Must avoid in vein selection
- Veins in lower extremities
- Areas of joint flexion
- Veins close to arteries and deeper lying vessels
- Veins that may be irritated from previous use
what veins should be used first?
distal veins
Healthy veins are easily detected by
palpation
Characteristics of Good Veins
- Bouncy
- Soft
- Refills when depressed
- Has a large lumen
- Straight
- Visible
- Is well supported
AVOID veins that are
- Bruised
- infected (phlebitis)
- Oedematous limbs
- Hard, fibrosed veins
- Areas of previous venipuncture
- Veins adjacent to infection
- Near bone
INFLUENCING FACTORS
- Temperature of the environment
- Patient anxiety
- Medication
- Age and weight of patient
- Position of patient
- Injury
- Privacy/dignity
3 PARTS OF A SYRINGE:
TIP
BARREL
PLUNGER
where the needle is attached
TIP
where the calibration scale is located
barrel
the inside part that fits into the barrel
plunger
what is needle made up of
staineless steel
3 PARTS OF A NEEDLE
HUB
CANNULA/SHAFT
BEVEL
are designed for situation that require precise measurement of a small volume of drugs
tuberculin and insulin syringes
refers to the thickness or diameter of the needle.
gauge