The shot is not without possible complications. Occasionally, a man will have some bleeding and a bruise where the medicine has been injected. But usually this clears up by itself and causes little or no pain. A more serious problem occurs when the artificially induced erection won’t go away. This can be a serious situation which, if left untreated, can cause permanent damage, when the blood clots and injures delicate tissues in the penis. If the erection won’t go down, the doctor will have to insert a larger needle into the shaft of the penis and suck the blood out with a syringe. Or he may need to inject another drug to counteract the effect of the first shot.
When you first have a shot, your erection should be gone before you go home. If the erection isn’t gone within four hours, or sometimes sooner, the doctor should remove the blood without delay.
Although these shots represent a real breakthrough in diagnosing impotence, they are not without risk. Clearly, patients who have such injections require expert supervision and care by physicians (usually urologists) who are able to handle the possible complications. Be sure you understand the procedure thoroughly before you agree to it.
Some experts think that the penile shots will become a commonly used diagnostic tool, and some researchers even believe the technique may eventually replace the NPT test in many cases.
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