A 55-year-old man has a 3-month history of chest pain and fainting spells. You feel his symptoms merit cardiac catheterization. You explain the risks and potential benefits to him, and include your assessment of his likely prognosis without the intervention. He is able to demonstrate that he understands all of this, but refuses the intervention.

Can he do that, legally? Should you leave it at that?

A 64-year-old woman with MS is hospitalized. The team feels she may need to be placed on a feeding tube soon to assure adequate nourishment. They ask the patient about this in the morning and she agrees. However, in the evening (before the tube has been placed), the patient becomes disoriented and seems confused about her decision to have the feeding tube placed. She tells the team she doesn't want it in. They revisit the question in the morning, when the patient is again lucid. Unable to recall her state of mind from the previous evening, the patient again agrees to the procedure.

One of your clinic patients is a 35-year-old man with AIDS on Medicare who is an active intravenous drug user. He uses heroin and cocaine, but he never shares needles and is reliably present at all his clinic visits. He admits that he is often unable to take his medicines regularly when he is using drugs. He is asking about antiretroviral therapy with protease inhibitors. You have just read that HIV viral resistance to protease inhibitors occurs rapidly when patients are unable to take their medicines reliably.

Should you prescribe protease inhibitors to this patient?

Your patient with cryptococcal meningitis eventually agrees to be tested for HIV and her test comes back positive. Due to her opportunistic infection she receives the diagnosis of AIDS.

Should she be reported to the department of public health?

A 22-year-old woman is admitted to the hospital with a headache, stiff neck and photophobia but an intact mental status. Lab test reveal cryptococcal meningitis, an infection commonly associated with HIV infection. When given the diagnosis, she adamantly refuses to be tested for HIV.

Should she be tested anyway by the medical staff?

You are the ICU attending physician taking care of a 40-year-old gay man with AIDS who is intubated with his third bout of pneumocystis pneumonia. His condition is worsening steadily and he has not responded to appropriate antibiotic therapy. The patient's longtime partner, Richard, has a signed durable power of attorney (DPOA) and states that if the patient's condition becomes futile the patient would not want ongoing ventilation. As the ICU attending you decide that ongoing intubation is futile.

An elderly man who lives in a nursing home is admitted to the medical ward with pneumonia. He is awake but severely demented. He can only mumble, but interacts and acknowledges family members. The admitting resident says that treating his pneumonia with antibiotics would be "futile" and suggests approaching the family with this stance.

Do you agree?

An elderly patient with irreversible respiratory disease is in the intensive care unit where repeated efforts to wean him from ventilator support have been unsuccessful. There is general agreement among the health care team that he could not survive outside of an intensive care setting. The patient has requested antibiotics should he develop an infection and CPR if he has a cardiac arrest.

Should a distinction be made between the interventions requested by the patient? Should the patient’s age be a factor?