Geriatric Medicine Principles

Geriatric medicine moves beyond treating individual diseases to address the complex, interconnected health needs of older adults. It requires a specialized, patient-centered approach that prioritizes function, safety, and quality of life. Mastering its principles is essential because aging is not merely a biological process but a unique clinical state where multiple chronic conditions, medications, and psychosocial factors collide, demanding a holistic strategy.

The Foundation: Comprehensive Geriatric Assessment

At the heart of geriatric care is the Comprehensive Geriatric Assessment (CGA), a multidimensional, interdisciplinary diagnostic process. Unlike a standard medical exam focused on a chief complaint, the CGA systematically evaluates an older person's medical, psychosocial, and functional capabilities. The goal is to develop a coordinated, integrated plan for treatment and long-term follow-up. Think of it as a full-system diagnostic for the whole person, not just their diseases.

For example, consider an 82-year-old woman admitted for heart failure. A standard approach might adjust her diuretics and discharge her. A CGA would also uncover that she lives alone, has poor vision, struggles to open her pill bottles, and has lost 10 pounds in the last month because she finds cooking difficult. Addressing only the heart failure would likely lead to rapid readmission. The CGA allows you to see the complete clinical picture and plan interventions—like a visiting nurse, medication aids, and Meals on Wheels—that support her overall health and independence.

Evaluating Function: Activities of Daily Living

A critical component of the CGA is the functional status evaluation. This involves assessing a patient's ability to perform Activities of Daily Living (ADLs) and Instrumental Activities of Daily Living (IADLs). ADLs are basic self-care tasks: bathing, dressing, toileting, transferring (e.g., from bed to chair), continence, and feeding. IADLs are more complex skills required for independent living, such as managing finances, handling medications, cooking, shopping, and using transportation.

Measuring ADL/IADL independence is a powerful prognostic tool. Dependence in these areas is a stronger predictor of mortality, hospitalization, and nursing home placement than many traditional medical diagnoses. In practice, you don't simply ask, "Can you bathe yourself?" Instead, you ask, "Do you need help getting in and out of the shower? Can you wash your entire body?" This granular detail reveals specific deficits that can be targeted with occupational therapy, home modifications, or caregiver support, directly preserving autonomy.

Screening Cognition: Early Detection of Decline

Cognitive screening is a brief, standardized evaluation to identify patients who may have impairment requiring a full diagnostic workup. It is a routine part of assessing older adults, as cognitive decline is often insidious and may be unreported by patients or families. Common, validated tools include the Mini-Mental State Examination (MMSE) and the Montreal Cognitive Assessment (MoCA).

The purpose of screening is not to diagnose but to flag. A patient scoring below a certain threshold on the MoCA, for instance, warrants a thorough history (including from a collateral source), physical and neurological exam, review of medications, and lab tests to rule out reversible causes like hypothyroidism or B12 deficiency. Early identification of mild cognitive impairment or dementia allows for timely planning, medication consideration (like cholinesterase inhibitors), safety interventions (e.g., driving assessment), and connecting families with support resources. It transforms a hidden problem into a manageable condition.

Assessing and Preventing Falls

Falls risk assessment is a mandatory evaluation for older adults. Falls are a sentinel event, often the first sign of underlying frailty, and a major source of morbidity (e.g., hip fractures) and loss of independence. A robust assessment is multifactorial. You must ask about fall history, but also evaluate gait and balance (e.g., with the Timed Up and Go test), review medications that increase fall risk (sedatives, antipsychotics, certain antihypertensives), check vision, and assess for orthostatic hypotension.

The findings directly guide multifactorial prevention interventions. If a patient has orthostasis, you might adjust blood pressure medications. Poor balance may warrant physical therapy for strength and gait training. Home hazards like loose rugs or poor lighting can be corrected. This proactive, bundled approach is far more effective than a single intervention. Preventing one fall can avert a cascade of disability, hospitalization, and nursing home admission.

Managing Polypharmacy and Deprescribing

Polypharmacy, typically defined as the use of five or more medications, is exceedingly common in older adults and is a major risk factor for adverse drug events, hospitalizations, and functional decline. Aging alters pharmacokinetics (what the body does to the drug) and pharmacodynamics (what the drug does to the body), increasing sensitivity to medications. A polypharmacy review is therefore a core safety practice.

This review employs deprescribing frameworks, which are systematic processes for reducing or stopping medications where the harms may outweigh the benefits. A helpful mnemonic is "SIMPLIFY": Review the Symptom indication for each drug, check for Interactions, assess Monitoring requirements, evaluate the Patient's life expectancy and goals of care, consider Lowering doses, Identify drugs with strong anticholinergic or sedative properties, find Frail-friendly alternatives, and ask Yes/No—would you start this drug today for this patient? The goal is not arbitrary subtraction, but optimizing the medication regimen to align with the patient's current health status and care goals.

Common Pitfalls

1. Treating Lab Values Instead of the Patient: Aggressively treating a slightly elevated HbA1c or blood pressure in a frail 90-year-old with tight control targets designed for younger adults can lead to harmful hypoglycemia or orthostatic falls. In geriatrics, treatment goals must be individualized, often favoring higher tolerances to avoid treatment-induced harm.
2. Attributing Symptoms Solely to "Old Age": Confusion, fatigue, or dizziness should never be dismissed as normal aging. These are non-specific symptoms that demand a diagnostic workup. "Old age" is not a diagnosis; it is a risk factor for specific, identifiable pathologies.
3. Overlooking the Power of Non-Pharmacologic Interventions: The first response to insomnia or agitation should not automatically be a pill. For insomnia, sleep hygiene and cognitive behavioral therapy are first-line. For agitation in dementia, identifying triggers (pain, infection, environment) and behavioral interventions are crucial. Medications are often a last resort.
4. Failing to Communicate with the Interdisciplinary Team: Geriatric care is a team sport. Neglecting to integrate insights from nursing (who see the patient's function), pharmacy (for medication reconciliation), social work (for psychosocial stressors), and therapy (for rehab potential) leads to fragmented, ineffective care. The physician must be the integrator and team leader.

Summary

• Geriatric medicine is defined by the Comprehensive Geriatric Assessment (CGA), a holistic, interdisciplinary evaluation that forms the basis for all care planning.
• Functional status evaluation through ADLs and IADLs is a key prognostic indicator and directs interventions to maintain independence.
• Routine cognitive screening is essential for the early detection of impairment, enabling timely diagnosis, management, and support planning.
• Falls risk assessment must be multifactorial, and its findings should directly inform bundled, multifactorial prevention interventions to reduce this major source of morbidity.
• Polypharmacy review using structured deprescribing frameworks is critical for medication safety, aiming to optimize regimens by discontinuing drugs where risks outweigh benefits.