In teaching the patient how to take his own blood pressure,which of the following statements is true?

Question

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Mercury manometers have a potential environmental risk associated with mercury; therefore,recommend that patients avoid using them.Blood pressure cuffs that are too small tend to overestimate blood pressure,while cuffs that are too large tend to underestimate blood pressure.Although electronic monitors are easier to use,they often provide systolic readings that are a little lower than the readings obtained by a health care professional,and the diastolic readings are often a little higher.

In Teaching the Patient How to Take His Own Blood