How long does tetanus skin test last?

For patients injured by rusty iron, need to inject tetanus antitoxin, the patient needs to carry out skin test, then the skin test time, generally 5 to 15 minutes after the injection observation, see whether the patient skin test site red, and raised in the skin hard lumps. If the skin test is positive, then consider not to inject tetanus antitoxin at this time, the patient needs to actively consider injecting tetanus immunoglobulin, tetanus antitoxin is cheaper, but tetanus immunoglobulin is more expensive, generally 2 to 3 times the price of antitoxin. In addition, for patients injected with tetanus, local wound treatment should be done first. After repeated washing with soapy water under running water, patients should be locally wiped and disinfected with hydrogen peroxide, and then disinfected with iodophor. After drying, they should be covered with sterile auxiliary materials or band-aids. Moreover, it is better not to touch the wound with water within three weeks. In addition, after dressing change, patients should be disinfected and changed regularly.