Being old and sick in America frequently means a doctor won’t ask you about troublesome concerns you deal with day to day — difficulty walking, dizziness, a leaky bladder, sleep disturbances memory lapses, and more.

It means that if you’re hospitalized, you have a good chance of being treated by a physician you’ve never met and undergoing questionable tests and treatments that might end up compromising your health.

It means that if you subsequently seek rehabilitation at a skilled nursing facility, you’ll encounter another medical team that doesn’t know you or understand your at-home circumstances.

Typically, a doctor won’t see you very often. In her new book, “Old & Sick in America: The Journey Through the Health Care System,” Muriel Gillick, a professor of population medicine at Harvard Medical School and director of the Program in Aging at Harvard Pilgrim Health Care Institute, delves into these concerns.

Her answer: A complex set of forces is responsible.

Some examples:

- Medical training doesn’t make geriatric expertise a priority.

- Care at bottom-line-oriented hospitals is driven by the availability of sophisticated technology.

- Drug companies and medical device manufacturers want to see their products adopted widely and offer incentives to ensure this happens.

- Medicare pays more for procedures than for the intensive counseling that older adults and caregivers need.

Gillick offered thoughts about how older adults and their caregivers can navigate this terrain.

QUESTION: What perils do older adults encounter as they travel through the health care system?

ANSWER: In general, physicians tend to focus on different organ systems. The heart. The lungs. The kidneys. They don’t focus so much on conditions that cross various organ systems, so-called geriatric syndromes. Things like falling, becoming confused or dealing with incontinence.

QUESTION: What can people do about that?

ANSWER: Older people are often unwilling to bring these issues to the attention of their doctors. But if a family member is accompanying the patient, they should speak up.

Another approach is to request a geriatric assessment or consultation that will bring these issues to the forefront.

QUESTION: How do geriatric assessments work?

ANSWER: A geriatric assessment does two major things. It looks at the whole person. And it focuses on that person’s functioning — on what they can do. Can they dress themselves, walk, get to the bathroom? Can they cook meals?

An outpatient geriatric assessment is typically 90 minutes to two hours and conducted by an interdisciplinary team. A social worker or a mental health professional will ask about the person’s family situation. A nurse practitioner will look at physical function. And a physician will go over medical concerns and examine the cognitive performance of the individual. Then, the team pulls all these pieces together to look at what’s going on with that person.

When someone starts being frail — having consistent difficulty doing things — an assessment of this kind is often a good idea.

QUESTION: The next step you talk about in your book is the hospital.

ANSWER: One of the big perils in the hospital is technology, which is also its great virtue. Technology can improve quality of life and be life-extending. But, sometimes, it creates endless complications.

An example are imaging tests such as CT scans. Physicians hardly think of this as an invasive test. But often one has to administer a dye to see what’s going on. That dye can cause kidney failure in someone with impaired kidney function - — something that’s common in older adults.

Sometimes there’s no real need for scans. An example would be an older person who becomes acutely confused in the hospital, which happens a lot. The appropriate response is to look at what’s causing the confusion and take away the offending agent. Often, that’s a medication that was started in the hospital. Or, it’s an infection. But the routine knee-jerk reaction is to do a CT scan to rule out the possibility of a stroke or bleeding in the brain.

QUESTION: What do you advise older patients and their families do?

ANSWER: When a test is proposed, ask the doctor “how important is it to pursue this diagnosis” and “how will the results change what you do?”

It’s also reasonable to say something along the lines of “every time I’ve had a test, it seems like I get into some kind of trouble. So, I really want to know, with this test or this treatment, what kind of trouble could I get into?”

QUESTION: In your book, you talk about how a doctor-patient relationship can be sidelined when someone goes to the hospital. Instead, hospitalists provide care. How should people respond?

ANSWER: It’s really important to give that doctor a sense of the patient and who they are.

Say, your 88-year-old mother is in the hospital, and she’s become profoundly confused. The doctor doesn’t know what she was like a week or a month ago. You or a caregiver want to come across as someone who can make it easier for the doctor to do his or her job — versus someone who’s a nuisance. You want to build trust, not annoyance.