If your doctor asks you to use a blood pressure recording machine at home for a period of a day or more, you will need to record the readings each day on a paper form. At the end of the monitoring period you will need to send the form to the surgery.
An alternative to the paper form is to fill the readings online. As soon as all your readings have been entered for the period you are monitoring (e.g. a single day, or any number of days up to a maximum of seven), you can send the form directly to the surgery without the need to use the post or a visit in person.
Another advantage is that the average blood pressure calculations are calculated automatically, eliminating possible errors and saving administration time within the surgery.