NURS305 Chapter Notes - Chapter 20: Deep Vein Thrombosis, Inferior Vena Cava, Superior Vena Cava
23 Dec 2016
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Document Summary
Disruption of the peripheral vascular or lymphatic system or increased pressure in fascia compartments of the arms and legs can have debilitating and fatal consequences. Arterial system: arteries, arterioles, and capillaries delivering oxygenated blood: 3 layers: tunica intima, tunica media, tunica externa, arteries have many elastic fibres to constrict and recoil with systole and diastole. They also have more smooth muscles (control bp: aorta is the biggest vessel: Largest artery in upper extremity is brachial arteries (and then to radial and ulnar) iliac arteries into femoral arteries lower extremities. Then to popliteal artery, splitting into dorsal pedia and tibial artery. Venous system: veins, venules, and connecting veins (perforators) unoxygenated blood: thin walled and low pressure. Superficial system includes the greater and lesser saphenous veins. Deep system includes the common femoral, femoral, profunda femoris, popliteal, and anterior, posterior, and peroneal tibial vessels: pressure gradient created by: respiration + skeletal muscle contraction + intraluminal valves regulates blood flow in venous system.
