Aging and Older Adults: Practice Questions & Explanations

Distinguishing NORMAL AGING from PATHOLOGY is essential nursing knowledge. NORMAL PHYSIOLOGICAL CHANGES OF AGING include: SKIN — decreased turgor (pinch test not reliable for dehydration in elderly), thinning, dryness, increased bruising, slower wound healing, age spots (lentigines), decreased subcutaneous fat; VISION — presbyopia (difficulty focusing on close objects, requiring reading glasses), reduced dark adaptation, increased sensitivity to glare, reduced peripheral vision, smaller pupil size; HEARING — presbycusis (high-frequency hearing loss), difficulty distinguishing speech in background noise; NEUROLOGICAL — slower reaction times, longer time to process information, some reduction in word retrieval (but NOT memory loss significant enough to impair daily life); RESPIRATORY — decreased lung elasticity, reduced maximum breathing capacity; CARDIOVASCULAR — stiffening of vessels (increased systolic BP), slowed heart rate response; RENAL — decreased GFR, reduced drug clearance; GI — slowed gastric motility (constipation tendency), reduced taste/smell; MUSCULOSKELETAL — sarcopenia (muscle loss), osteoporosis risk, joint changes, decreased height.

Not normal aging: severe short-term memory loss, confusion (delirium or dementia must be evaluated), new incontinence (may indicate UTI, pelvic floor dysfunction, etc.), chest pain, significant dyspnea, sudden vision changes, falls without explanation.

Pn role: differentiate normal from pathological; adapt assessments and care to older adults (e.g., slower pace, larger font, brighter lighting, fall precautions, medication management for polypharmacy).

FALLS are the leading cause of injury death and one of the most common causes of injury in adults aged 65 and older. FALL RISK ASSESSMENT is a key PN nursing responsibility.

Major fall risk factors: (1) POLYPHARMACY — taking multiple medications increases interaction risks; medications contributing to falls include antihypertensives (orthostatic hypotension), diuretics (frequent urination, dizziness), sedatives/hypnotics (benzodiazepines, sleep aids), opioids, antidepressants, antipsychotics, anticonvulsants, and alcohol; (2) HISTORY OF PREVIOUS FALLS — strongest single predictor; (3) GAIT AND BALANCE PROBLEMS — shuffling gait, Parkinson's disease, stroke deficits; (4) MUSCLE WEAKNESS — sarcopenia; (5) IMPAIRED VISION — cataracts, macular degeneration, glaucoma; (6) ENVIRONMENTAL HAZARDS — poor lighting, loose rugs, no grab bars, clutter, slippery surfaces; (7) ORTHOSTATIC HYPOTENSION — check by measuring BP lying, sitting, standing (significant if drops ≥20 mmHg systolic or ≥10 mmHg diastolic); (8) COGNITIVE IMPAIRMENT — dementia increases fall risk; (9) URINARY URGENCY — rushing to bathroom; (10) FOOT PROBLEMS — neuropathy, poor footwear.

Standardized tools: Morse Fall Scale, Hendrich II — used in hospitals and care settings.

Nursing interventions: bed in lowest position, call light within reach, non-skid footwear, frequent toileting rounds, adequate lighting, remove environmental hazards, ensure assistive devices are available, medication review, post fall precaution signs, family education.

PHARMACOKINETICS IN OLDER ADULTS is altered in multiple ways, creating significant medication management considerations.

Absorption: generally less affected; gastric motility may be slowed (delayed peak effect); some medications requiring acidic environment may be affected by reduced gastric acid.

Distribution: decreased total body water (more concentrated water-soluble drugs); increased body fat proportion (fat-soluble drugs stored longer, extended duration of action); decreased serum albumin (more free drug in circulation for protein-bound medications — higher risk of toxicity).

Metabolism: decreased hepatic blood flow and enzyme activity; slower first-pass metabolism; many drugs metabolized more slowly, requiring lower doses or longer intervals.

Elimination: RENAL CLEARANCE is the most clinically significant change — GFR decreases approximately 1 mL/min/year after age 40; drugs cleared renally (e.g., digoxin, metformin, many antibiotics, NSAIDs) accumulate more easily; creatinine clearance (CrCl) must be estimated using Cockcroft-Gault formula using ACTUAL weight and creatinine — note that older adults may have a 'normal' serum creatinine despite low GFR due to reduced muscle mass and creatinine production.

Polypharmacy: the term for taking 5 or more medications; very common in older adults; increases risk of: drug interactions, adverse effects, nonadherence, falls, cognitive impairment.

Beers criteria: AGS (American Geriatrics Society) list of medications considered potentially inappropriate for older adults: benzodiazepines, first-generation antihistamines (diphenhydramine/Benadryl), anticholinergics, some NSAIDs, muscle relaxants.

Nursing monitoring: watch for toxicity signs of narrow-therapeutic-index drugs (digoxin — bradycardia, nausea, visual changes; warfarin — bleeding; lithium — tremors, GI upset, cognitive changes); monitor renal function; keep medication lists updated; reconcile medications at every visit.

ORTHOSTATIC HYPOTENSION is defined as a drop in systolic blood pressure of 20 mmHg or more (or diastolic 10 mmHg or more) within 3 minutes of standing from a sitting or lying position. OLDER ADULTS ARE AT HIGHER RISK because: baroreceptors (pressure sensors in blood vessels) become less sensitive with age — the reflex to increase heart rate and vasoconstriction when standing is slower; reduced cardiovascular reserve means the body compensates less effectively; many older adults are dehydrated due to reduced thirst sensation; polypharmacy compounds the risk (multiple antihypertensives, diuretics, alpha-blockers, beta-blockers). PATIENT TEACHING — ORTHOSTATIC PRECAUTIONS: Sit on the edge of the bed for 1-2 minutes before standing; stand slowly; hold onto a support rail or sturdy piece of furniture when first standing; wait until any dizziness passes before walking; if dizzy, sit or lie back down immediately; report persistent dizziness to provider.

Consequences of orthostatic hypotension: Falls — the most serious consequence; head injuries, hip fractures, subdural hematomas; syncope (fainting).

Pn role: Teach safety; measure orthostatic blood pressure (lying, sitting, standing) when antihypertensives are initiated or dosage changes; document and report positive orthostatic changes to RN/provider.

Normal physiological changes with aging:

Renal: GFR decreases approximately 1% per year after age 40; reduced creatinine clearance means medications eliminated renally accumulate to higher levels at the same dose — dosage adjustments are often required.

Musculoskeletal: Muscle mass decreases (sarcopenia); bone density decreases; height decreases.

Cardiovascular: Maximum heart rate decreases; cardiac reserve decreases; blood pressure often increases (not decreases) with age due to arterial stiffness.

Respiratory: Vital capacity decreases; chest wall compliance decreases.

Sensory: Visual acuity decreases; hearing loss (presbycusis); taste and smell decline; GI: Decreased GI motility (constipation risk); decreased gastric acid.

Neurological: Slowed reaction time; decreased balance; memory retrieval (not storage) slows. Normal aging changes ≠ disease — these are expected, not pathological.

Normal aging can involve some gradual changes, such as slower information processing and certain sensory changes (vision, hearing), which the nurse accommodates in communication and teaching. Importantly, significant or sudden confusion is NOT a normal part of aging and should be evaluated rather than dismissed. Older adults remain capable of learning, and they are a diverse group, so care is individualized. Distinguishing expected age-related changes from findings that warrant evaluation is a standard health-promotion/aging concept. (This reflects general principles; any specific clinical assessment should be verified against current NCLEX prep materials and provider guidance.)

A general health-promotion principle for older adults is to promote a safe home environment while supporting independence — for example, reducing fall hazards through adequate lighting, clear walkways, and removing tripping hazards, and encouraging appropriate activity. Falls are a significant safety concern for older adults, so reducing hazards is important, but the goal is to support, not eliminate, the client's independence and activity. Encouraging clutter or discouraging all activity would be counterproductive. Understanding general home-safety and fall-prevention principles for older adults is standard content. (Verify specifics against current NCLEX prep materials.)

For an older adult with mild hearing changes, helpful general communication adaptations include facing the client so they can see your face, speaking clearly at a normal-to-slightly-slower pace and lower pitch, reducing background noise, and confirming the client understood. Shouting can distort speech and seem disrespectful, avoiding speaking isolates the client, and relying solely on written notes ignores the individual's needs and literacy. Adapting communication to sensory changes supports effective, respectful care. Understanding these communication adaptations for older adults is a standard health-promotion concept. (Verify against current NCLEX prep materials.)