if your child suffers from this then i am sure you will already been told the best way by your doctor so why are you asking us stupid public on here we are not certified to answer

Blood pressure varies with the age of the child, and is meticulously related to height and consequence. A one-year-ancient with a blood pressure of 110/70 has hypertension; a ten-year-ancient with 110/70 is normal.

One of the most common reasons for “high blood pressure” in family is a mistaken conception obtained by using an inappropriately sized cuff. Family come in a wide variety of sizes; cuffs come in five: 3, 5, 7, 12, and 18 cm widths. (The lengths are not vital as long as they fully encircle the arm.) The tables for normal blood pressures for family were compiled using cuffs of only these five widths, so while a conception obtained using the apt cuff may not reflect precisely the real pressure in a child’s artery, it will tell you whether or not her blood pressure is in the normal range.

Even if lists relating cuff size to age or consequence are available, the best way to choose a cuff size relates to the length of a child’s upper arm (or thigh). Select the smallest cuff that covers 2/3 of the upper arm or leg. A further way of saying the same thing is that the uncovered skin should be half the width of the cuff. Cuffs that are too narrow always give a deceptively high conception. Conversely, overlarge cuffs will underestimate the right blood pressure.

Whenever there is documented high blood pressure, blood pressure should be leisurely in both arms and in one leg. Underlying causes such as coarctation of the aorta (a congenital narrowing of the largest artery in the body) are often overlooked until a leg blood pressure is taken.