my very own blood pressure machine

For years I have been sharing a blood pressure machine with my sister/roommate. Like, with the rest of her life, she has rules for use. She prefers if you do it first thing in the morning, on a day she picks. She hates mid-day or evening readings. But what I'm trying to do is give the doctor a broad spectrum of results so he can determine if he can lower or remove any meds. We fight over the BP machine.

The other day I went to take my blood pressure and it was wacky. Off the charts wacky. Time to go to the hospital wacky.  I said to her, have you been having odd readings? Grumble. I took it three times. I never moved an inch and it went up dramatically each time. When was the last time you changed the batteries? Grumble. I think there is something wrong with the machine. Then she let loose. She was convinced that my astronomical readings were saved in the machine and her doctor would see them and she'd get upset? Huh. Where did that come from? They only stay in the machine if you save them to the memory.

Then next day she went to take her BP and declared the machine broken. I asked again about the batteries. She went and got some from the cupboard. Still nothing. She starts looking in the ads for coupon and BP machine sales.  I said, why not try new-from-the-store batteries. Grumble. When I go out I bring home batteries and put them in. It worked. Grumble.

I decided then and there that I'd buy my own machine. I have hidden in my room. All hell will break loose if she knows it exists. I bought the CVS brand because it was cheaper, and also I get an addition 20% off with my Aetna CVS card.