Caregiving for Someone With Cognitive Impairment and Cancer

Two very different things get called confusion, and telling them apart is the most useful thing a caregiver can do.

Dementia comes on slowly, over months and years. It does not come and go much from hour to hour.

Delirium comes on fast. NCI defines it as "a confused mental state that includes changes in awareness, thinking, judgment, sleeping patterns, as well as behavior." It can appear over a day or two, and it swings.

NCI warns that "delirium may be mistaken for depression or dementia," and that "these conditions are different and have different treatments."

Here is the part that matters most. NCI states that "many episodes of delirium are caused by medicine or dehydration and are reversible." Reversible. Not a permanent decline, and not the cancer taking a final turn.

Medical-review hold: This draft discusses urgent or high-risk decisions. It is excluded from public search until a qualified clinician reviews the wording. Follow the patient's own care plan now.

If someone becomes newly confused, call the oncology team the same day.

The National Institute on Aging puts it plainly for caregivers: "sudden or rapidly fluctuating changes in behavior, especially if the person has had an infection or recent medication changes, should be immediately brought to a doctor's attention."

People with cancer are already frail, already on many drugs, and already prone to infection. Waiting to see if it settles wastes the window in which the cause can be found and fixed.

NCI describes three patterns of delirium.

• Hyperactive. The person is restless, anxious, agitated, and uncooperative. Nobody misses this one.
• Hypoactive. The person is sleepy, tired, or seems depressed. This one gets missed constantly.
• Mixed. The person moves between the two.

A quiet, withdrawn patient is often read as low mood, or as being worn out by chemotherapy. Sometimes it is delirium. If a normally chatty person has gone flat and sleepy within a couple of days, say the word "delirium" out loud to the team. Ask for it to be ruled out.

NCI names the usual triggers: advanced cancer, older age, brain tumors, dehydration, infection, high doses of opioid pain medicine, and withdrawal from a medicine.

That list is your checklist for the phone call. Report, in this order:

1. Any new medicine started or stopped in the past week.
2. How much the person has had to drink in the past two days.
3. Any fever, cough, burning on urination, or new pain.
4. Bowels: when did they last open?
5. Recent dose changes in pain medicine.

None of that requires medical training. All of it narrows the search.

Do not stop a prescribed opioid on your own because you suspect it is the cause. Report the dose and the timing, and let the team decide. Withdrawal is itself on NCI's list of causes.

NCI advises families to control the environment. Keep it quiet. Keep it well lit. Put familiar objects where they can be seen.

Practical version of that: turn the television off, keep one person talking at a time, open the curtains during the day, and put glasses and hearing aids back on. Poor eyesight and poor hearing make confusion worse.

NIA also notes that "a noisy or stressful environment (for example, many conversations at once or a loud TV or radio)" can worsen behavior, and lists pain, poor sleep, constipation, hunger, and thirst as physical triggers worth checking first.

At some point someone will ask whether the person can still consent to treatment. That question has a technical answer.

StatPearls, the clinical reference from the National Library of Medicine, describes four parts of decision-making capacity.

1. Understanding. The person can "express understanding about their medical situation, the decision they are making, and any risks or benefits."
2. Expressing a choice. They can give "a clear, consistent choice without frequently changing their mind."
3. Appreciation. They can "apply the understanding of their medical situation to their own life."
4. Reasoning. They can "infer the consequences of their decision" and explain why.

Two things follow from that.

Capacity is judged against the decision in front of the person. Someone may be able to choose what to eat, or to say who they want in the room, and still not be able to weigh a third-line chemotherapy regimen. A blanket label of "confused" is not an assessment.

Capacity is also not the same as competence. StatPearls draws the line: capacity is "the definition which the medical community utilizes," while competence "is the legal assessment of a patient's ability to make medical decisions that can only be decided by a judiciary system." A doctor assesses capacity. Only a court decides competence.

If the person lacks capacity, StatPearls says clinicians "seek out the patient's directive or a proxy who can make medical decisions for them." Where there is neither, the team and an ethics committee decide in the short term.

That is a poor substitute for the person's own wishes. So do this early, while they can still take part.

NIA describes the documents. A durable power of attorney for health care "names your health care proxy, a person who can make health care decisions for you if you are unable to communicate these yourself." Choose someone "familiar with your values and wishes." Add a POLST or MOLST form if the person is seriously ill, which NIA describes as a medical order that professionals "can act on immediately in an emergency."

Ask for these at an ordinary clinic visit, on a good day. Do not wait for a hospital admission.

NIA's communication guidance is specific, and it works in an infusion suite as well as at home.

• "Make eye contact and call the person by name."
• Offer a choice between two things rather than an open question. NIA's example is "Do you want fish or chicken for dinner?" rather than an open-ended question.
• Give one instruction at a time.
• "Allow more time for the person to respond. Be patient and try not to interrupt."
• Do not correct. Say "Let's try it this way" rather than "That's not how you do it."
• Use touch. "Hold the person's hand while you talk."
• Do not use baby talk, and do not talk about them as if they are not there.

That last one is worth pressing with clinicians too. Ask them to speak to the patient first and to you second.

NIA's advice is simple: "try to keep the person to a routine by bathing, dressing, and eating at the same time each day."

Cancer treatment fights this. Appointments move, infusions overrun, and steroids wreck sleep for three nights after each cycle. So ask for what makes routine possible. Request the same appointment time each cycle. Ask whether steroids can be taken in the morning. Ask whether bloods can be drawn locally instead of at the cancer center.

Those are reasonable scheduling requests. Say why you are asking, and they are more likely to be granted.

• Delirium (PDQ) — Patient Version — National Cancer Institute
• Alzheimer's Caregiving: Managing Personality and Behavior Changes — National Institute on Aging
• Communicating With Someone Who Has Alzheimer's Disease — National Institute on Aging
• Advance Care Planning: Advance Directives for Health Care — National Institute on Aging
• Refusal of Care — StatPearls, National Library of Medicine