If your GP has advised you to regularly check your blood pressure at home, you first need to decide whether to buy a monitor that measures it at your upper arm, or at your wrist. Should you opt for the latter, you can choose one without the conventional cuff, as there are now blood pressure monitor bracelets on the market. You wear one all day, during which it measures the pressure at certain intervals, says the Berlin-based TÜV Association, which tests product safety. Whether wrist cuff or bracelet, a wrist blood pressure monitor isn’t for everyone. If you smoke, have diabetes or a vascular d…