Pain Management

What are the primary tenets of geriatric medicine regarding pain?

The relief of pain and suffering, and the promotion of functional status and quality of life.

How is pain officially defined in a clinical context?

An unpleasant sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage.

What percentage of community-dwelling older adults experience substantial pain?

25% to 50%.

What is the estimated prevalence of substantial pain among nursing-home residents?

45% to 80%.

In which age group is pain considered particularly common?

Adults ≥ 65 years old.

What is the estimated percentage of patients ≥ 85 years old affected by substantial pain?

80%.

Why is pain considered 'idiosyncratic' and subjective?

Because it results from a unique interaction of biological, psychological, and social factors; the intensity and character of pain are exactly what the patient says they are, beyond any objective measure.

What are three common reasons geriatric patients might underreport or minimize their pain?

1. Limited health literacy or cognitive impairment. 2. Erroneously perceiving pain as a normal part of aging. 3. Fear that opioid medications will lead to addiction.

What are three common clinician-side barriers to effective pain management?

1. Inadequate assessment due to lack of time. 2. Inadequate knowledge of management strategies or misperceptions about narcotics. 3. Reluctance to use therapies not thoroughly tested in older adults.

What is the primary difference between Acute and Chronic (Persistent) pain?

Acute pain is sudden, short-term, and linked to a specific injury. Chronic pain persists beyond normal healing time (usually 3-6 months) and often lacks an apparent biological purpose.

What are the functional and psychological consequences of debilitating chronic pain?

It affects ADLs and IADLs, causes psychological distress (depression/anxiety), disturbs sleep, and negatively impacts social and personal relationships.

What are the key psychosocial and physical risk factors for the transition from acute to persistent pain?

Lower socioeconomic status, vivid memory of childhood trauma, obesity, low level of physical fitness, overuse of joints/muscles, chronic illnesses, lack of social support, and history of abuse.

What is the primary clinical consequence of an inadequate pain assessment?

It acts as a major barrier to effective treatment and prevents the formulation of a successful plan to treat persistent pain.

What are the 5 axes of the IASP taxonomy for the classification of pain?

1. Anatomy regions. 2. Organ systems. 3. Temporal characteristics/pattern. 4. Intensity/time since onset. 5. Etiology.

Besides pain intensity, what other domains should a clinician assess to understand the impact of pain?

Functional status (ADLs/IADLs), mood (using the Geriatric Depression Scale), sleep, and emotional/social well-being.

What four factors specifically complicate the assessment of pain in older adults?

1. Underreporting of symptoms. 2. Multiple medical comorbidities. 3. Increased prevalence of cognitive impairment. 4. Cultural differences in the perception or expression of pain.

What has research consistently shown regarding the treatment of pain in ethnic minorities?

Ethnic minorities are often undertreated across different healthcare settings; clinicians must reflect on personal biases that may influence pain management.

What is the difference between Unidimensional and Multidimensional pain scales?

Unidimensional scales (e.g., Numeric Rating, Faces, Verbal Descriptor) measure a single characteristic like severity while multidimensional scales (e.g., McGill Pain Questionnaire) measure a variety of domains and provide more info, but are more time-intensive.

What is the 'Golden Rule' for using pain scales during follow-up examinations?

The same scale should be used at follow-up as was used in the initial assessment to accurately evaluate how the pain has changed.

What is a 'Pain Map' and what are two clinical benefits of using one?

A drawing of a human figure where the patient marks their pain locations. It enhances reliability in repeated assessments and facilitates reporting of pain in sensitive areas.

When should a clinician consider a referral to a mental health specialist based on a pain map?

If the pain pattern is erratic, diffuse, or does not conform to an anatomic distribution, which may suggest an underlying disorder complicating the presentation.

What are the key findings a clinician should look for when evaluating for Fibromyalgia?

Multiple tender points, sleep disturbance, fatigue, generalized pain, and morning stiffness.

How is Myofascial Pain identified during a physical exam?

By the presence of taut muscle bands and trigger points; this is common in patients with persistent pain.

What is 'Nociceptive Pain' and how is it further categorized?

Pain due to the activation of sensory receptors. It is divided into Somatic (well-localized in skin, soft tissue, bone) and Visceral (due to cardiac, GI, or lung injury).

What is 'Neuropathic Pain' and how does it typically respond to medications?

Pain from irritation of the central or peripheral nervous system. It may respond well to nonopioid therapies but has an unpredictable response to opioids.

What is the definition of 'Nociplastic Pain'?

Pain where there is no evidence of a specific lesion or disease, but it has characteristics of both nociceptive and neuropathic pain (formerly called 'mixed' pain).

Why is Nociplastic Pain particularly significant in the geriatric population?

It is common in older adults, highly complex, and very difficult to manage.

What type of pain is described as 'burning,' 'shooting,' or 'like an electric shock'?

Neuropathic pain

What type of pain is described as 'aching' or 'throbbing' in a specific spot?

Somatic pain

What are the primary sources of Somatic Nociceptive pain?

Tissue injury involving bones, soft tissue, joints, or muscles.

How is Somatic Nociceptive pain typically described by a patient?

It is well-localized and constant; described as aching, stabbing, gnawing, or throbbing.

What are common clinical examples of Somatic Nociceptive pain?

Arthritis, acute postoperative pain, fractures, and bone metastases.

Which drug classes have a Strength of Evidence (SOE) of 'A' for treating Somatic pain?

Acetaminophen and NSAIDs.

What is the primary source of Visceral Nociceptive pain?

The viscera (internal organs).

What are the unique descriptors for Visceral pain compared to Somatic?

It is diffuse and poorly localized; described as dull, colicky, squeezing, deep, or cramping.

What systemic symptoms are often associated with Visceral Nociceptive pain?

Nausea, vomiting, and diaphoresis (sweating).

What is the first-line non-pharmacologic treatment for both types of Nociceptive pain?

Physical and cognitive-behavioral therapies (SOE: B for Somatic, C for Visceral).

What are two common clinical examples of Visceral Nociceptive pain?

Renal colic (kidney stones) and constipation.

What is the primary source of Neuropathic pain?

Irritation or injury to components of the central or peripheral nervous system.

What are the characteristic sensory descriptors for Neuropathic pain?

Burning, shooting, electric shock-like, tingling, or numbing.

What are Allodynia and Hyperalgesia in the context of Neuropathic pain?

Allodynia is pain caused by a stimulus that does not normally provoke pain; Hyperalgesia is increased sensitivity to a stimulus that is normally painful.

Which three drug classes are first-line (SOE: A) for Neuropathic pain?

1. Tricyclic antidepressants (TCAs). 2. Serotonin-norepinephrine reuptake inhibitors (SNRIs). 3. Anticonvulsants (e.g., Gabapentin/Pregabalin).

What are two common clinical examples of Neuropathic pain in older adults?

Diabetic neuropathy and Post-herpetic neuralgia (shingles pain).

How is Nociplastic pain defined?

Pain that arises from altered nociception despite no clear evidence of actual or threatened tissue damage.

What are the clinical characteristics often associated with Nociplastic pain?

Edema, regional sweating abnormalities, changes in skin blood flow, and trophic features.

What is the recommended management strategy for Nociplastic pain?

Trials of different medications/combinations and a multimodal, interprofessional approach.

What are two examples of Nociplastic pain syndromes?

Fibromyalgia and Complex Regional Pain Syndrome (CRPS).

How is 'Undetermined Pain' defined in the geriatric pain taxonomy?

Pain that is poorly understood and does not clearly fit into the nociceptive, neuropathic, or nociplastic categories.

What is the primary clinical challenge of Undetermined Pain?

It is difficult to find targeted pharmacological treatments, often leading to frustration.

What should the clinician's priority be when a patient presents with Undetermined Pain?

To validate the patient's experience of pain and manage the impact on function and quality of life.

What drug classes are used for Undetermined Pain, and what is their Strength of Evidence (SOE)?

Antidepressants (SOE: B) and Antianxiety agents (SOE: C).

What non-pharmacological therapies are recommended for Undetermined Pain?

Physical therapy, Cognitive-Behavioral Therapy (CBT), and psychological therapies.

Which pain type specifically lists 'Topical Anesthetics' as a treatment option?

Neuropathic pain.

How does the role of psychology change between Neuropathic and Undetermined pain treatment?

For Neuropathic pain, it is Level C evidence; for Undetermined pain, it is a higher priority (Level B).

What are the primary facial expressions that suggest an older adult with cognitive impairment is in pain?

Slight frown, sad or frightened face, grimacing, wrinkled forehead, closed/tightened eyes, distorted expressions, or rapid blinking.

Which vocalizations or verbalizations are considered common pain behaviors?

Sighing, moaning, groaning, grunting, chanting, calling out, noisy breathing, asking for help, or sudden verbal abusiveness.

What body movements should a clinician monitor as signs of potential pain?

Rigid or tense posture, guarding, fidgeting, increased pacing or rocking, restricted movement, and sudden changes in gait or mobility.

How might a cognitively impaired patient's interpersonal interactions change due to pain?

They may become aggressive, combative, or resist care. Conversely, they may withdraw, show decreased social interaction, or become socially inappropriate and disruptive.

What changes in daily activity patterns or routines can indicate underlying pain?

Refusing food/appetite changes, increased rest periods, changes in sleep patterns, sudden cessation of common routines, or increased wandering.

What mental status changes are frequently associated with pain in this population?

Crying or tears, increased confusion, and heightened irritability or distress.

What are the primary nonpharmacologic strategies for managing pain in older adults?

Patient education, partner-guided pain management training for caregivers, Cognitive-Behavioral Therapy (CBT), regular physical activity (Tai chi, water aerobics), and supervised rehab for frail patients.

What is a critical safety precaution when performing joint or soft tissue injections with corticosteroids?

Avoid injecting directly into a tendon, as this significantly increases the risk of rupture.

What is the recommended minimum time interval between corticosteroid injections?

Injections should be spaced out by at least 4-6 weeks.

When are Trigger Point Injections indicated, and how often are they performed?

They are indicated for acute/chronic muscle pain associated with bone or muscle pathology. Local anesthetic is injected once or twice weekly until relief is attained.

What is the clinical role and limitation of Epidural Steroid Injections?

They have a potential role for short-term relief of spinal stenosis and radiculopathy, but they are generally ineffective for long-term relief.

What is Pulsed Radiofrequency (PFR) and what types of pain can it treat?

The use of short pulses of radiofrequency signals to neural tissue. It treats various chronic pains, including trigeminal neuralgia, sacroiliac joint pain, and postsurgical pain.

What are the three primary goals of Pharmacological Therapy in geriatrics beyond just pain relief?

Improved function, enhanced adherence with rehabilitation, and minimized adverse effects.

Describe the three steps of the WHO Analgesic Ladder for geriatric patients.

1. Step 1: Nonopioid medications (Acetaminophen/NSAIDs) ± Adjuvants. 2. Step 2: Weak opioids (e.g., Hydrocodone + Acetaminophen) + Adjuvants. 3. Step 3: Strong opioids (e.g., Morphine, Hydromorphone) ± Nonopioids/Adjuvants.

What determines the choice of initial dose and rate of titration in pharmacological therapy?

The individual patient's physiology (e.g., renal/hepatic function and overall frailty).

Why is Acetaminophen (Tylenol) recommended as first-line therapy for persistent pain in older adults?

It is particularly effective for musculoskeletal osteoarthritic pain and is preferred over NSAIDs due to a lower risk of renal and GI toxicity.

What is the preferred maximal 24-hour dose of Acetaminophen for older adults?

Approximately 3 grams.

In which patients should the Acetaminophen dose be reduced by 50% or avoided entirely?

Patients at risk of liver dysfunction, especially those with a history of heavy alcohol intake.

What are the specific dosing intervals for Acetaminophen based on Creatinine Clearance (CrCl)?

Every 6 hours for CrCl 10-50 mL/min, and every 8 hours for CrCl <10 mL/min.

Why is scheduled dosing of Acetaminophen preferred over 'as-needed' (PRN) dosing for persistent pain?

Regularly scheduled administration is more effective at maintaining steady therapeutic levels and alleviating persistent pain.

What are the primary Adverse Effects (AEs) of NSAIDs in the geriatric population?

Renal dysfunction, GI bleeding, platelet dysfunction, fluid retention, exacerbation of HTN or Heart Failure, and precipitation of delirium.

What is the FDA caution regarding the co-administration of Ibuprofen and Aspirin?

Ibuprofen can block the antiplatelet effect of Aspirin, increasing cardiovascular risk.

What medications can be co-prescribed to reduce the risk of NSAID-induced GI bleeding?

Misoprostol or a Proton Pump Inhibitor (PPI).

What must be established before starting a geriatric patient on opioid therapy?

The patient's overall health status, including any contraindications or potential risks.

What is required for a full risk/benefit discussion in opioid therapy?

A full risk/benefit discussion, established treatment goals, and a plan for discontinuation if goals are not met.

What are the MME (Morphine Milligram Equivalent) thresholds for prescribing Naloxone and for general avoidance?

Prescribe Naloxone if given >50 MME/day; avoid exceeding 90 MME/day.

How is the dose for 'breakthrough pain' calculated for a patient on long-acting opioids?

The dose should be 5%-15% of the total daily dose, offered every 2 to 4 hours orally.

What common side effect of opioids does the body NOT develop a tolerance to, requiring a proactive bowel regimen?

Constipation (along with nausea and sedation).

Which opioid should be avoided in patients with renal failure and why?

Morphine should be avoided because its metabolites can accumulate, leading to toxicity. If it must be used, the dose must be reduced and the interval increased.

Which opioids are generally considered safer alternatives to Morphine for older adults with renal dysfunction?

Oxycodone and Hydromorphone (Dilaudid), though clinicians should still 'start low and go slow' with Hydromorphone.

What are the three primary fears/barriers older adults have regarding opioid therapy?

1. Fear of addiction. 2. Fear that the medication will lose effectiveness (tolerance) before the pain becomes more severe. 3. General concerns about long-term use.

Define the difference between Physical Dependence, Tolerance, and Addiction (Psychological Dependence).

Physical Dependence is the occurrence of withdrawal if the drug is stopped. Tolerance is the physiological need for higher doses over time for the same effect. Addiction is compulsive drug-seeking despite adverse consequences.

What red flags should a prescriber monitor for regarding opioid misuse or diversion?

Repeated requests for dose increases, early refill requests, and obtaining prescriptions from multiple providers.

What is the protocol for switching a patient from one opioid to a different one (Opioid Rotation)?

Due to partial cross-tolerance, the dose of the new drug should be reduced by 25% to 50% of the calculated equianalgesic dose.

How should a clinician manage the inevitable side effect of opioid-induced constipation?

Proactively start a stimulant laxative like Senna. If needed, add an osmotic agent (e.g., Miralax). Avoid bulking agents (fiber/psyllium) in ill/inactive patients as they can cause fecal impaction.

What should a patient be warned about regarding 'Sedation and Cognitive Impairment' when starting an opioid?

Warn them that these effects usually subside within days to weeks, but they must avoid driving, operating heavy machinery, and be aware of an increased risk of falls during the initiation period.

What is the recommended treatment for severe, persistent opioid-induced sedation?

Consider an opioid rotation or the use of a low-dose stimulant, such as Methylphenidate.

What is the recommended strategy for discontinuing chronic opioid therapy to avoid withdrawal?

Taper the medication carefully over a period of days to weeks to prevent symptoms like restlessness, tachycardia, and hypertension.

What is the clinical 'trigger' for using Naloxone to reverse opioid-induced respiratory depression?

Experts suggest withholding Naloxone unless the patient's respiratory rate decreases to less than 8 breaths per minute or their O2 saturation drops below 90%, as reversal can precipitate a pain crisis.

Which specific TCA (Tricyclic Antidepressant) should be strictly avoided in older adults?

Amitriptyline should be avoided due to its strong anticholinergic side effects; safer alternatives include desipramine or nortriptyline.

Which SNRI is FDA-approved for both depression and multiple pain types including diabetic neuropathy and fibromyalgia?

Duloxetine (Cymbalta).

What is a major neurological risk associated with the use of Tramadol?

It lowers the seizure threshold and may precipitate serotonin syndrome if used with other serotonergic medications.

Why should fiber-based 'bulking agents' be avoided for opioid-induced constipation in inactive patients?

They can lead to fecal impaction; stimulant laxatives like Senna are preferred.

What does the current clinical evidence say about using Cannabis for persistent non-cancer pain in seniors?

There is currently no evidence supporting its use for persistent non-cancer pain, and high-quality studies often exclude adults over age 60.

What are the primary risks associated with cannabis use in the geriatric population?

Increased risk of falls, worsening cognitive impairment, and potentially acute myocardial infarction (MI).

What is the rule for switching (rotating) a patient from one opioid to another?

Because of partial cross-tolerance, you should reduce the dose of the new drug by 25% to 50% of the calculated equivalent dose.