Venepuncture Module 1 Flashcards
What are the main two layers of the skin
The Epidermis (less sensitive) and the Dermis (more sensitive).
Between arteries and veins which has more muscle?
Arteries have more muscle for their diameter
Between arteries and veins which utilises valves?
Veins
Between arteries and veins which are often visible?
Veins as arteries are deep and protected
Between arteries and veins which are palpable?
Arteries will pulsate and veins are non-pulsating
Where would the cephalic vein be found?
Between the arm and the wrist
Is the cephalic vein a good vein to use for venepuncture?
Yes
What are the considerations when using the cephalic vein for venepuncture?
- Should not be used for patients that require fistula formation
- The radial nerve runs parallel to this vein so avoid the wrist area where they are close together
- It is best located above the anterior cubicle
Where is the anterior cubicle/antecubital fossa located?
It is located in a depression on the anterior surface of the elbow joint. It is also called the antecubital fossa because it lies anteriorly to the elbow
Where is the basilic vein found?
Between the shoulder and wrist
Where is the accessory cephalic vein found?
The top of the forearm (it is usually a good size)
Where is the dorsal basilic vein found?
Off the cephalic vein located at the lower end of the forearm on the underside
How do we obtain easier access to a patients dorsal basilic vein?
Have the patient flex toe forearm at the elbow and face the patient to expose underside of the arm
Where is the median cubital vein found?
In the antecubital fossa - it is a large vein which is easily seen and accessed.
What are some positive and negative considerations of venepuncture at the median cubital vein site?
+ Usually used to draw blood for shock or trauma patients
- Joint articulation makes access site limited in its use
- Complications of this site mean veins below the point of entry are not reccommended
Where is the median vein located?
From the palm of the hand to the underside of the forearm
Is the median vein a good vein for venepuncture?
No as is may be difficult to palpate and runs very close to the nerve
Describe the dorsal venous network in the hands and whether it is suitable for venepucture?
The dorsal venous network is formed by a union of metacarpal veins on the dorsal aspect of the forearm. They may not always be prominent however the angle of the vein can be a good choice of site for venepuncture
Describe the dorsal digital veins in the hands and whether it is suitable for venepucture?
These veins are found along the lateral portion of the fingers and thumb. They should be a last resort for venepuncture and should only be accessed by an expert.
What does dorsal mean?
Back portion of the body
Describe the dorsal metacarpal veins in the hands and whether it is suitable for venepucture?
Found between the metacarpal bones on the back of the hand they are a good site for venepuncture for some patients.
What parts make up the tunica intima (inner layer of the vein)?
Elastin, Squamous Epithelium, Basement membrane
