M. C. cause of superficial thrombophlebitis
REF. WASHINGTON MANUAL OF SURGERY)
a. A variety of things can cause inflammation of a superficial vein.
b. Most common cause is due to intravenous (IV) catheters or solutions and medications used in hospitals that pierce the vein wall and cause irritation.
c. Any blow to a vein (like a blow or injury from a car accident) will trigger a local inflammatory reaction that leads to pain, discomfort, redness, and swelling.
d. During this process, there's an increased flow of blood to the injured area, and a blood clot often forms in the inflamed or injured area of the vein.
e. Blood clots in the deep veins of the legs or pelvis are often caused by inactivity following surgery, stroke, or a major accident that causes people to be bed-ridden for long periods of time.
f. Blood flow in the veins depends on contraction of surrounding muscles, so with extended bed rest, the blood starts to pool and blood clots can easily form.
g. Sometimes, thrombophlebitis is caused by a bacterial infection in the vein.
h. The usual culprit is a bacteria called Staphylococcus, commonly found on the skin.
i. Women over the age of 35 years who smoke and take oral contraceptives are at a higher risk of thrombophlebitis.