Jessica's grandmother has begun to notice her hands and feet become numb more often when she sits for long periods of time. in what types of activities should she participate that would most benefit her cardiovascular system?

Assuming grandmother is without physical disabilities, then she could
1) not sit for more than 30 minutes at a time
2) walk for 30 minutes moving her arms to increase the flow of blood
3) ride a bike
4) garden
5) household chores, like vacuuming, sweeping
6) walk on her tiptoes

If she's lying in bed she can do leg & arm lifts, rotate her wrists & ankles in a circular motion to increase blood flow.

Sitting for prolonged periods for anyone is not good. The arteries that feed your lower legs are bent at the hips and blood flow slows; puts one at risk for a blood clot.

20 times a minute is usually the average respritory rate of an adult. additionally the patient is breathing on his own, is clearly maintaining his airway, and is intaking a sufficient amount of air. you shouldn't use a bag valve mask, cpap, or other form of positive pressure ventilation, unless the patient has lost control of his airway, and is not breathing (apneic) or has rapid breathing or slow and shallow respirations. this patient would most likely and should be put on an non-rebreather mask or nrb attached to 100% high flow oxygen at 15 l/min. don't use a nasal cannula, as the amount of oxygen it provides is limited with a rate of 6 l/min.