EXAM 2 PART 2 Flashcards
Vessels in the vascular system transport:
blood and lymph
When there is a disease in the vascular system, what occurs?
the delivery of O2 and nutrients to the cells and retards the elimination of CO2 and waste products from cellular metabolism
The pumping heart (arteries) is a:
high pressure system
Arteries contain:
Elastic fibers and muscle fibers that allow for stretching and recoil as well as control of the amount of blood delivered to tissues
What happens when vascular smooth muscle contracts?
changes occur to the diameter of the arteries to control the rate of blood flow
What happens during recoil?
blood is propelled
What is a pulse?
arteries pressure wave
Where is the temporal artery felt?
in front of the ear
Where is the carotid artery felt?
in the groove b/w the sternomastoid muscle and trachea
What major artery supplies the arm and runs in the biceps-triceps furrow of the upper arm, surfacing at the antecubital fossa in the elbow
brachial artery
What is the major artery in the leg?
femoral artery which passes under the inguinal ligament and travels down the thigh
When the femoral artery courses posteriorly at the lower thigh, it is called?
popliteal artery
What is the function of arteries?
to supply O2 and essential nutrients to the cells
______ is a deficient supply of O2 arterial blood to tissues caused by obstruction of a blood vessel
ischemia
A complete blockage leads to:
tissue death
A partial blockage leads to:
an insufficient supply of blood
_______ affects noncoronary arteries and refers to arteries supplying the limb, usually caused by atherosclerosis
Peripheral artery disease
What veins connect veins that join the two sets?
perforators
Veins drain _________ with its waste products from tissues and returns it to the heart
Deoxygenated blood
What type of system are veins?
low pressure system
When walking, inspiration decreases ______ and increases _______
thoracic pressure; abdominal pressure
What has a large diameter that is more distensible and can expand far enough to hold more blood and increase blood volume? (compensatory mechanism to reduce stress on the heart)
veins
What does efficient venous return depend on? What do issues with any of them lead to?
- contracting skeletal muscles
- competent valves in the veins
- a patent lumen
- venous stasis *
Who is at risk for venous disease?
those who undergo prolonged standing, sitting or bed rest (due to lack of milking action ) and those in hypercoagulable states and vein wall trauma
Venous pooling (varicose veins) occurs in:
- obese people
- women with multiple pregnancies
What would occur without lymphatic drainage?
fluid would build up and produce edema
What creates the force for colloid osmotic pressure that pulls interstitial fluid back into the venules or are captured by lymph vessels and returned to the bloodstream?
plasma proteins
How does the immune system detect and illuminate foreign pathogens?
by phagocytosis of the substances via neutrophils and monocytes/macrophages and by producing specific antibodies (specific immune responses by lymphocytes)
What are the organs of the lymphatic system?
- spleen
- tonsils
- thymus
Where is the spleen located and what it its function?
- LUQ
1. destroy old RBCs
2. produce antibodies
3. store RBC
4. filter microorganisms from the blood
Where are the tonsils located and what are their function?
- at the entrance of the respiratory and GI tracts
- to respond to local inflammation
List the different types of tonsils:
- palatine
- pharyngeal
- lingual
Where is the thymus located and what is its function?
- flat, prink-gray gland located in the superior mediastinum behind the sternum and in front of the aorta.
- develops the T lymphocytes of the immune system in children
Where do B lymphocytes originate from?
bone marrow but mature in the lymphoid tissue
________ occurs when peripheral blood vessels grow more rigid with age
Arteriosclerosis (produces rise in SBP)
________ is the deposition of fatty plaques on the intima of the arteries
atherosclerosis
_______ is under-diagnosed and undertreated but is a large cause of morbidity (painful walking/wound healing)
PAD
What is IC?
A pain in a specific muscle group that is brought on by walking and is relieved by rest
Many older adults suffer from:
- disability
- arthritis
- peripheral neuropathy
Aging produces a progressive enlargement of the _______
intramuscular calf veins
What increases an older persons risk for DVT and pulmonary embolism?
- prolonged bed rest
- prolonged immobilization
- heart failure
What medication reduces the risk for venous thromboembolism?
low dose anticoagulant
Loss of lymphatic tissue leads to fewer numbers of lymph nodes in older people and to a:
decrease in the size of remaining nodes
What are risk factors for PAD?
- smoking
- diabetes
- HTN
- high cholesterol
- obesity
- depression (for women)
What is the first line noninvasive test for PAD?
the ankle brachial index
PVD includes:
PAD and venous disease
Why do people with PAD experience claudication (muscle fatigue or pain) when walking)?
because blood flow cannot match muscle demand
__________ is the number of blocks walked or stairs climbed to produce pain
claudication distance
Night leg pain is common in _______ and may indicate ischemic rest pain of PAD, severe night muscles cramping (usually in the calf) or restless leg syndrome
older people
What is aortoiliac occlusion associated with?
erectile dysfunction (leriche syndrome)
What are risk factors for PVD?
- smoking
- diabetes
What occurs with PAD and what should be avoided?
- coolness
- varicose veins
- avoid compression stocking since they impede blood flow
______ occurs with chronic arterial and venous disease
leg ulcers
When do lymph nodes become enlarged?
with infection, malignancies, and immunologic diseases
What medications are used to prevent blood clots in some people?
- low dose aspirin
- clopidogrel
Use the ______ to detect early clubbing
profile sign
Normal nail beds have a ______ degree angle
160
How quick should capillary refill occur?
3 seconds
What may prevent capillary refill?
- a cool room
- decreased body temperate
- smoking
- peripheral edema
- anemia
Flattening of an angle and clubbing occur with:
congenital cyanotic heart disease and cor pulmonale
What does capillary refill lasting longer than 3 seconds signify?
- vasoconstriction or decreased CO (hypovolemia, heart failure, shock)
What can occur after breast surgery or radiation?
Swelling of the upper extremity due to lymphatic drainage being obstructed
When does a full bounding pulse (3+) occur?
- hyperkinetic states (exercise, anxiety, fever)
- anemia
- hyperthyroidism
When does a weak, thready pulse (1+) occur?
- shock
- PAD
An enlarged ________ occurs with infection of the hand or forearm
epitrochlear node
This test evaluates the adequacy of collateral circulation before cannulating the radial artery.
modified allen test
What is adequate circulation in the modified allen test suggested by?
a palmar brush, a return to the normal color of the hand in less than 7 seconds
If a DVT is suspected, you should:
measure the calf circumference
If lymphedema is suspected, you should:
measure at the ankle, distal calf, knee and thigh
- thin, shiny, atrophic skin
- thick-ridged nails
- hair loss
- ulcers
- gangrene
are all signs of?
malnutrition
What occurs with arterial insufficiency?
- malnutrition
- pallor
- coolness
What are the signs of an abnormal calf muscle?
- acute, unilateral, painful swelling
- asymmetry of 1 cm or more
What occurs with DVT?
asymmetric calf swelling of >2cm
Brown discoloration occurs with:
chronic venous stasis caused by hemosiderin deposits from RBC degradation
Where do venous ulcers occur and why?
At medial malleolus because of bacterial invasion of poorly drained tissues
Where do ulcers occur with arterial deficit?
- tips of toes
- metatarsal heads
- lateral malleoli
The unilateral cooling of a foot or leg or sudden temperate drop as you move down the leg occurs with:
arterial ischemia
If you cannot locate the posterior tibial pulse, what can you do?
try passive, dorsiflexion of the foot to make the pulse more accessible
How can you check for pretibial edema?
firmly press the skin over the tibia or the medial malleolus for 5 seconds and release
What is the grading scale for pitting edema?
1+ = mild pitting, slight indentation, no perceptible swelling of the leg 2+ = moderate pitting, indentation subsides rapidly 3+ = deep pitting, indentation remains for a short time, leg looks swollen 4+ = very deep pitting, indentation lasts a long time, leg is grossly swollen and distorted
Unilateral edema occurs with _________. Unilateral or bilateral edema occurs with _______. With these factors, it is brawny or nonpitting and feels hard to the touch
occlusion of a deep vein; lymphatic obstruction
What does bilateral pitting edema call for and why?
examination of the neck veins to see if they are abnormally distended. if so, the peripheral edema may be related to heart disease or pulmonary HTN. If normal, edema may be caused by another disease.
What should you do if you suspect a arterial deficit in the legs?
raise the legs about 30 cm off the table and ask the person to wag their feet for 30 seconds to drain off venous blood
Elevational pallor indicates:
arterial insufficiency
What is the normal time it takes for color to return to the feet?
10 seconds or less
What is the normal time it takes for superficial veins around the feet to fill?
15 seconds or less
What results from loss of vasomotor tone and pooling of blood in the veins?
chronic hypoxia
Delayed venous filling occurs with:
arterial insufficiency