HOW DO pH INDICATORS WORK? pH indicators detect the presence of H+ and OH-. They do this by reacting with H+ and OH-: they are themselves. weak acids and bases. If an indicator is a weak acid and is coloured and its conjugate base has a different. colour, deprotonation causes a colour change.
Have varicose veins, which are a common cause of superficial thrombophlebitis. Have a pacemaker or have a thin, flexible tube (catheter) in a central vein, for treatment of a medical condition, which may irritate the blood vessel wall and decrease blood flow. Are pregnant or have just given birth.
Abstracted by Gary W. Lemon. Clinical Presentation /Diagnosis. Superficial venous thrombophlebitis (SVT) is an attack of blood clots in veins that lie under the skin within the fat of the body but not in the. It is deep veinsa relatively common medical problem. It can get better and then happen again (recurrence). It has a low chance but known risk of deep vein thrombosis (DVT, blood clots in the deep veins) and pulmonary embolism (blood clots moving to the lungs). How often SVT occurs in the population is unknown.