Vessels Of The Hand Flashcards
Pathway of the ulnar artery
Enters the hand anterior to the flexor retinaculum, lateral to the pisiform, medial to the hook of the hamate (guyon canal), antero-lateral to the ulnar nerve
What does the ulnar artery divide into?
Into a main branch, the superficial palmar arch and the deep palmar branch.
Pathway of the radial artery
Curves dorsally around the scaphoid and trapezium
Crosses the floor of the anatomic snuff box.
Enters the palm between the heads of the 1st dorsal interosseous muscle, then turns medially between the heads of the adductor pollicis
As it crosses the deep palmar space, what does the radial artery divide into?
Into a main branch- the deep palmar arch
And superficial palmar arch
The deep palmar arch turns medially at the:
At the medially at the metacarpal bases to meet the deep palmar branch (off the ulnar)
Where do the palmar metacarpals arteries form?
Over the metacarpals (duh)
The superficial palmar arch gives off _____ ______ ____ to digits 2-4
Common palmar digital arteries
The deep palmar arch gives off the: (3)
Palmar metacarpal arteries
Princeps pollicis artery and the radialic indicis artery
What arteries anastomose to form paired proper palmar digital arteries?
The superficial palmar arch and the deep palmar arch
Superficial and deep palmar arteries
Proper palmar digital artery Common palmar digital artery Superficial palmar arch Deep palmar branch of ulnar artery Ulnar artery Princeps Pollicis artery Deep palmar arch Radial artery
Superficial and deep palmar venous arches are ________ to the arterial structure
Parallel
Dorsal metacarpal veins unite to form:
The dorsal venous network (superficial to the metacarpals)
Ischemia of the fingers
Vasoconstriction of the fingers, causing the blood to stop moving to them so it can support more vital organs
Causes of ischemia of fingers
Frostbite (appropriate ischemia)
Reynaud’s Disease (inappropriate ischemia)
A vascular disorder that affects blood flow to the extremities which include fingers, toes, nose and ears when exposed to temperature changes or stress
Raynoud’s disease
Raynoud’s disease is an exaggeration of:
Vasomotor responses- a hyper activation of the sympathetic system in response to cold or emotional stress
Raynaud’s disease can lead to:
Tissue hypoxia
With Raynoud’s disease, what causes the skin to turn blue?
Oxygen supply is depleated (venodilation, cyanosis)
After the blood returns to the fingers, Raynaud’s disease can be accompanied by:
why?
Swelling and tingling
Possibly due to reactive hyperemia of the areas deprived of blood flow (local control)
Primary Raynaud’s
Partly hereditary. Often develops in young women.
Only occurs by themselves and are not accompanied by other diseases
Secondary Raynoud’s
Secondary to multiple diseases, usually connective tissue diseases.
What type of Raynaud’s can progress to necrosis of the fingertips?
Secondary
The tendons of the FDS and the FDP enter a common flexor sheath where?
Deep to the flexor retinaculum
