Question
What methods are used for trace element testing in children? We are currently taking blood from the thigh, which is very painful. Is there a simpler method? Since I am near Tianjin, I would like to ask if there is a simpler method there. Thank you!
Answer
Generally, blood is taken from the fingerpad for trace element testing. There is no need to fast for this. It’s fine. For testing trace elements, venous blood is usually collected. Some also use fingerstick blood or blood drawn from the upper arm for the test. Compared to venous blood, it is relatively more accurate. The blood collection site can be chosen at the elbow vein. In summary, if you want to determine the true and accurate situation of trace elements, it is best to have a blood test.