Peripheral Venous- Lower Flashcards
Intraluminal pressure of the venous system?
5-15mmHg
What determines the shape of the vein?
Transmural pressure
internal pressure of vein-external pressue of the surrounding tissue
Arteries and veins are composed of different layers.
True
Intima- endothelial
Media- smooth muscle/fiber
Externa- elastic/fibrous tissues
Seems to be the same but just different thicknesses?
How many valves are in the SVC or brachiocephalic vein?
0
The deep veins of the lower extremities start:
with the plantar veins in the foot
Plantar veins come together and form:
posterior tibial veins
Where does the PTV course?
Medial aspect of ankle and calves
Anterior to achilles tendon
Plantar veins of foot
Anterior tibial veins join with:
dorsalis pedis
originate at the plantar arches
Peroneal vein
lateral ankle/calf
How do the veins of the upper and lower extremities differ?
The lower extremity veins have more muscle due to hydrostatic pressure
Capillary beds are composed of:
intima
Venules are composed of:
intima and adventia (no media)
Pressures in the venules do not exceed
20mmHg
What iliac vein is more likely for a DVT? Why?
Left because it sits right behind the dst aorta and rt iliac artery
Deep venous arches empty their blood into:
Tibial veins
Veins in the lower extremities originate
at the confluence of the venules of the deep digital veins
What is a venae comitantes? Where do we see them
2 veins of the same name following a single artery of the same name
Calf and forearms
Pop v courses posterior to artery, however, appears anterior on US due to scan approach
ok
Fem V courses _________ to fem A
posterior
Profunda FV drains
muscles in the thigh (quads)
CFV courses ______ and ________ to CFA
Medial and posterior
IIV drains the pelvic organs, except for _____
gonads
The iliacs join together at what level?
L5
_________ drains blood from the lower calf and _________ veins drain blood from the upper calf.
Soleal (lower– connect to the PTV and PV)
Gastrocnemius (upper– drains into PopV)
What’s the main function of the superficial veins of the lower extremities?
Regulating body temperature or conserving heat
Where does the GSV originate?
anterior medial malleolus
Where does the SSV originate?
Dorsum of the foot/little toe, courses posteriorly
Vein of Giacomini:
When the SSV continues above the knee and connects to the GSV
Most proximal tributary of the GSV?
superficial epigastric vein
What is the sign for the saph veins? What does it indicate
“eye sign”
Indicates that the vessel is coursing between the superficial and deep fascia
Perforating veins travel from
superficial to deep
Perforators have ____ valve
1
Communicating veins connect:
GSV and SSV
Communicating veins penetrate the deep fascia in the calf but not the deep fascia in the thigh.
False, they never penetrate deep fascia
When a patient has venous stasis ulcers, what vessel is affected?
Posterior tibial perforators (ankle perforators)
How many valves does the soleal sinus have
0
Most lower extremity DVT’s start where
soleal sinuses
Which vessel has the most valves?
GSV
Which vessels do not have valves
IVC, internal/external/common iliacs, and soleal sinuses
CFV has/have ___ valve(s)
1
PopV has/have ___ valve(s)
1-3
PTV/ATV/PER has/have ___ valve(s)
<12
SSV has/have ___ valve(s)
6-12
GSV has/have ___ valve(s)
12-14 (mostly below knee)
