Ph meters

It's number is valuable. When I took my son in his Doctor appointment I make sure I asked the nurse about his development growth from his weight and height. Also the Doctor will ask me question to determine is mental, skills development. To continue his regular visit they use their ph meters to know his weight, temperature and so on. One thing I hated is at the end of his last appointment they tried to get him some blood sample but they could not find his veins and then gave him 3 shots. That was a pain as mom to see her son crying in pain.