Comfort (Pain)

Definitions and Nature of Pain

• Definition of Pain: An unpleasant sensory and emotional experience associated with actual or potential tissue damage.

• Subjectivity of Pain: Pain is defined as whatever the person experiencing it says it is; it is entirely subjective.

• Non-verbal Patients: It is explicitly recognized that patients who are non-verbal can and do experience pain.

Physiology of Pain

• Nociceptive Pain:   - Definition: Experienced when an intact, properly functioning nervous system signals that tissues are damaged, requiring attention and proper care.   - Duration: Can be transient (short-lived) or persistent.

• Subcategories of Pain:   - Somatic: Originates in the skin, muscles, and bones.   - Visceral: Originates in the organs or body cavity; typically poorly localized.   - Neuropathic: Results from damaged or malfunctioning nerves.   - Radicular: Derives specifically from the spinal cord.

The Four Physiological Processes of Nociception

1. Transduction: Triggered by mechanical, thermal, or chemical stimuli.

2. Transmission: The pain impulse travels from peripheral nerve fibers to the spinal cord and then to the brain.

3. Perception: The point at which the individual becomes conscious of the pain.

4. Modulation: A natural mechanism within the body that modifies the pain signal.

Gate Control Theory

• Pain Perception Point: The mechanism involves nociceptors (receptors) and spinal ganglia.

• Fiber Types:   - A-delta fibers: Responsible for fast transmission of sharp, localized pain.   - C fibers: Responsible for slow transmission of dull, burning, or chronic pain.

• Signal Path: Impulses travel through the lateral spinothalamic tract.

• Dorsal Horn: The location where the pain signal is modified.

Contributing Factors to Pain

• Chemical: Chemical stimuli influencing pain perception.

• Developmental: Includes Gerontologic considerations for aging populations.

• Physical: Direct physical impact or damage.

• Physiological: Internal biological processes.

• Psychosociocultural: The influence of psychological state, social environment, and culture.

• Iatrogenic: Pain resulting from medical examination or treatment.

Comparative Analysis: Acute Pain vs. Chronic Pain

• Acute Pain:   - Intensity: Mild to severe.   - System Response: Sympathetic nervous system (SNS).   - Clinical Signs:     - Increased pulse rate.     - Increased respiratory rate.     - Elevated blood pressure.     - Diaphoresis (sweating).     - Dilated pupils.   - Duration: Related to tissue injury; resolves with healing.   - Behavior: Client may be restless and anxious, reports pain, and exhibits behavior like crying, rubbing, or holding the area.

• Chronic Pain:   - Intensity: Mild to severe.   - System Response: Parasympathetic nervous system (PNS).   - Clinical Signs:     - Normal vital signs.     - Dry, warm skin.     - Pupils normal or dilated.   - Duration: Continues beyond the period of healing.   - Behavior: Client is usually depressed and withdrawn, often does not mention pain unless asked, and specific pain behaviors are often absent.

Pain Assessment Terminology

• Pain Threshold: The least amount of stimuli needed for an individual to experience pain.

• Pain Tolerance: The maximum amount of pain that a person is willing to withstand before seeking relief.

• Pattern: Includes onset, duration, recurrences, intervals without pain, and constancy.

• Precipitating Factors: Stressors that precede or worsen pain.

• Alleviating Factors: Interventions which decrease the intensity of pain.

• Intractable Pain: Pain that cannot be managed.

• Associated Symptoms: Examples include nausea, vomiting, diarrhea, and dizziness.

• Location Categories:   - Localized.   - Diffuse.   - Referred.   - Radiating.   - Phantom pain.

• Intensity or Severity: Measured using rating scales.

• Quality or Character: The specific adjectives used to describe the sensation of pain.

• Affective Responses: The patient's feelings, interpretation of the pain, and how it affects their level of function.

Sites of Referred Pain

• Anterior Sites:   - Heart.   - Lungs and diaphragm.   - Liver.   - Gallbladder.   - Stomach.   - Kidneys.   - Ovaries.   - Appendix.   - Ureters.   - Bladder.

• Posterior Sites:   - Heart.   - Liver.   - Kidneys.

Pain Assessment Mnemonics

• COLDERR:   - C: Character.   - O: Onset.   - L: Location.   - D: Duration.   - E: Exacerbation.   - R: Relief.   - R: Radiation.

• PQRST:   - P: Provoked (what brought the pain on).   - Q: Quality.   - R: Region / Radiation.   - S: Severity.   - T: Timing.

• OLDCARTS:   - O: Onset.   - L: Location.   - D: Duration.   - C: Characteristics.   - A: Aggravating factors.   - R: Radiating (referred, region, location).   - T: Treatment (what has alleviated it; also ask what has not worked).   - S: Severity (intensity).

Pain Measurement Scales

• Numeric Severity Pain Scale:   - Range: $0$ to $10$.   - $0$: No pain.   - $1$ to $3$: Mild pain.   - $4$ to $6$: Moderate pain.   - $7$ to $9$: Severe / Very severe pain.   - $10$: Worst possible pain.

• Wong-Baker FACES Rating Scale (Visual Analog):   - Provides English, Spanish (Escala de Dolor), and Bosnian (Skala bola) translations.   - 0 (No Pain): Ningun dolor / Nemam bolova.   - 2 (Annoying mild pain): dolor molesto y moderado / Imam blage bolove.   - 4 (Uncomfortable moderate pain): Dolor incómodo y moderado / Neugodan popriliǎn bol.   - 6 (Dreadful severe pain): Dolor intenso y severo / Nemoguce jak bol.   - 8 (Horrible very severe pain): Dolor horible y muy severo / Strasǎn vrlo jak bol.   - 10 (Unbearable worst possible pain): Dolor insoportable y el peor posible / Nepodnošljiv najgore moguci bol.

• FLACC Scale: Used for assessment based on:   - F: Facial Expression.   - L: Leg Movement.   - A: Activity.   - C: Cry.   - C: Consolability.

Nursing Diagnoses and Interventions

• Nursing Diagnoses:   - Acute Pain or Chronic Pain.   - Impaired Physical Mobility.   - Hopelessness.   - Anxiety.   - Ineffective Coping.   - Ineffective Health Maintenance.   - Deficient Knowledge (Pain Control Measures).   - Disturbed Sleep Patterns.

• Nursing Goals: Must vary according to the specific diagnosis and its defining characteristics.

• General Nursing Interventions:   - Establish a trusting relationship.   - Consider the patient’s ability and willingness to participate.   - Use a variety of pharmacologic and non-pharmacologic measures.   - Provide relief before pain becomes severe.   - Use measures the patient believes are effective.   - Align measures with the reported severity.   - Encourage trying ineffective measures again before abandoning them.   - Maintain an unbiased attitude; provide culturally responsive care.   - Prevent harm and educate patients, families, and caregivers.

Pharmacological Pain Management

• Barriers (Opioid Concerns):   - Addiction: A primary, chronic, relapsing, neurobiological disease.   - Dependence: Manifested by withdrawal syndrome.   - Tolerance: A state of physiological adaptation.

• Opioid Analgesics (Narcotics):   - Benefit: No ceiling effect on analgesia (dose can be titrated up).   - Considerations: Must monitor side effects, routes of administration, and know the antidote.

• Nonopioids (NSAIDs):   - Examples: acetaminophen, ibuprofen, aspirin (ASA).   - Characteristics: Vary in anti-inflammatory effects and side effects but similar in potency.   - Limitation: They have a ceiling effect on analgesia and a narrow therapeutic index.

• Coanalgesics (Adjuvants):   - Types: Antidepressants, Anticonvulsants, Local anesthetics, others.   - Includes placebos and follows the World Health Organization (WHO) analgesic ladder.

Invasive and Non-Pharmacological Management

• Invasive Therapies:   - Intraspinal/Epidural: Catheter placed in the epidural space ($L_2-L_3$ intervertebral space), above the dura mater and subarachnoid space.   - Patient-Controlled Analgesia (PCA): Allows patient-managed dosing.   - Surgical Disruption: Includes cordotomy, rhizotomy, and neurotomy.   - Sympathectomy: Used for vasospasm to improve blood supply in peripheral ischemia.   - Spinal Cord Stimulation: Electrode implanted next to the spinal cord connected to a generator.

• Non-Pharmacological Approaches:   - Cutaneous stimulation.   - Immobilization or therapeutic exercises.   - Transcutaneous electrical nerve stimulation (TENS).

• Cognitive-Behavioral (Mind-Body) Interventions:   - Goals include distraction, relaxation, repatterning thinking, facilitating coping, spiritual interventions, and complementary/alternative healing modalities.

Questions & Discussion

• Question 1: When a patient has arrived on the nursing unit from surgery, the nurse is most likely to give priority to which assessment?   - Options: Character of pain; Pain intensity; Location of pain; Pain history.   - Answer: Pain intensity.   - Rationale: Assessing pain intensity frequently in postoperative patients is crucial for managing acute pain. While character and location are important, intensity takes priority for immediate relief. Pain history is less important during acute episodes as the patient may be too uncomfortable to answer.

• Question 2: A patient who had abdominal surgery $4$ hours ago is receiving a continuous epidural infusion of an analgesic. Which observation indicates the nurse should monitor the patient closely?   - Options: Drowsy, drifts off to sleep before completing a sentence; Respirations $18/\text{minute}$; Drowsy, easily aroused; Pain rating $1-2/10$.   - Answer: Drowsy, drifts off to sleep before completing a sentence.   - Rationale: This indicates an increasing level of sedation, which serves as an early warning sign of impending respiratory depression. Normal respirations are $12-20/\text{minute}$.

• Question 3: The patient has an order of morphine $2.5$ to $5.0\,mg$ IV every $4$ hours. He received $2.5\,mg$ IV $4$ hours ago for pain rated at $3$ on a scale of $0$ to $10$. He is now watching TV and visiting with family. When you ask about his pain, he rates it as a $9$. His VS are stable. What intervention is most appropriate?   - Options: Give morphine $3.5\,mg$ IV and inform him to watch TV; Give $2.5\,mg$ to avoid addiction; Give nothing because he shows no signs of pain; Give morphine $5.0\,mg$ IV and reassess in $20$ minutes.   - Answer: Give morphine $5.0\,mg$ IV and reassess in $20$ minutes.   - Rationale: The patient's subjective perception/rating of pain is the most important data point regardless of outward behavior. A rating of $9$ warrants the higher dose range.

• Question 4: During an admission nursing assessment, a patient with diabetes describes his leg pain as a ’dull, burning sensation.’ The nurse recognizes this as characteristic of which type of pain?   - Options: Physiological; Somatic; Visceral; Neuropathic.   - Answer: Neuropathic.   - Rationale: ’Dull, burning’ descriptions are classic hallmarks of neuropathic pain, and patients with diabetes often suffer from peripheral neuropathy.

• Question 5: A patient recovering from abdominal surgery refuses analgesia, saying he is ’fine, as long as he doesn't move.’ Which nursing diagnosis should be a priority?   - Options: Deficient Knowledge (pain control measures); Ineffective Health Maintenance; Risk for Ineffective Airway Clearance; Impaired Physical Mobility.   - Answer: Deficient Knowledge (pain control measures).   - Rationale: The nurse must determine if the patient understands how pain affects recovery and address potential misconceptions that prevent the use of needed relief measures.