While measuring blood pressure I don't hear the sound?

Both your previous answers, if you follow the link are just advertizements for Altace. And then one claims to be a doctor and recommends Altace for a normal blood pressure.

I'll answer your question honestly.

You're supposed to go with what you hear. We were always taught to go with the first beat we hear, and then note the last beat heard. This is why it's imperative you have proper placement of the stethoscope over the artery. It's why we listen over the joint because the cuff is already, in an effort for accuracy, supposed to be about and inch or 2 above the joint, with the indicated line over the approximate area where the artery would be running the length of the arm. You should practice and see if you are placing the stethoscope properly. Also, be careful about how you press down on the stethoscope. Snug enough so it's stable and doesn't slide, but also as loose as possible to hear the faintest beat. You want to hear it because that first beat is not always very loud. In fact, the first 2 or 3 beats are usually pretty quiet.

Also, ideally, you're supposed to have the person at a state of rest for at least 15 minutes to get an accurate reading of blood pressure at the given state. For example, if they have to lay down in a supine position, they need to be that way for at least 15 minutes to get the most accurate reading. Same with sitting. Now, by "rest," I don't mean sleeping. Sleeping or half asleep, passed out all effect blood pressure. Awake, alert, and responsive, but at rest in whatever position, is the ideal situation. Also, if they're talking about how their boyfriend cheated on them, that tends to affect blood pressure as well. Emotions affect blood pressure.

Now, I've been there, I know that clinics do not adhere to the 15 minute ideal, that people are often in a hurried state, and the minimal 5 minutes at rest is itself almost impossible to get, so this is why you do your best to work with the doctor or nurse you're doing this for, and see exactly how they like it done, and sort of follow their lead on it. Just don't take shortcuts, ever, especially on the medical forms because when comes down to you or them, it will always be you who gets shafted. You make sure that any mistakes, any errors, any negligence, is always a result of what they did, not what you did/said/wrote. If it takes you a little longer, well, longer is better than the jail and the money that you can be sued for. Even if it means you have to look stupid because you don't know all the jargon, so you have to spell it out more in plain English, at least you remained accurate. The rest is up to the doctor or nurse.

And if you're for a nurse, especially a civilian nurse, the politics behind that profession is tremendous, like probably worse than actual politics because a nurse will take extra steps just to ensure someone else gets the blame if something goes wrong. That's why you need to cover yourself and make sure all your ducks are in a row, and only care about the good of the patient, even at the sacrifice of your career because one time is all it takes, and you're paying off a huge lawsuit, serving jail time for negligence, or you're license to practice medicine is forever taken away, and you are labelled with a stigma that could haunt the rest of your life in any kind of care-taking field.

In fact, you should probably not be asking yahoo answers. You should probably be looking this up in a textbook.