Module 1 CCN Pain

Pain, Agitation & Sedation Management in ICU

In the ICU, patients often experience painful procedures, invasive tubes, sleep deprivation, and anxiety. Creating a healing environment can be challenging amidst alarms and emergencies.

Critical Care Guidelines for Pain, Agitation & Sedation

Guidelines first published in 2002 and revised in 2013 that focus on the need for sedation, pain management, and agitation control in critically ill patients.

ICU Liberation Protocol

A protocol that aims to minimize the long-term effects of intensive care by optimizing pain management, sedation, delirium prevention, mobility, and family engagement.

ABCDEF Protocol

A set of guidelines designed to optimize sedation and analgesia in critically ill patients.

A: Analgesia First

Manage pain before sedation.

B: Sedation

Sedation should be light and balanced.

C: Daily Interruption of Sedation

Daily interruption of sedation to evaluate the patient.

D: Delirium Management

Prevention and early detection of delirium.

E: Early Mobilization

Promotes recovery and prevents complications related to immobility.

F: Family Engagement

Involvement of family members in patient care and recovery.

Sedation and Analgesia

Integral components of managing ICU patients. Proper management reduces the stress response, prevents complications like delirium, and promotes better patient outcomes.

Over-Sedation

Excessive sedation that may lead to prolonged mechanical ventilation, ICU-acquired weakness, delirium, and inability to assess neurological function.

Goal of Sedation

Arousable and comfortable sedation.

Optimal Level of Sedation

A level that offers comfort while allowing interaction with the environment.

Light Sedation Strategy

Target the lightest possible level of sedation and use daily sedative interruption when appropriate.

Adequate Sedation and Analgesia

Facilitates mechanical ventilation, creates anxiolysis analgesia, and amnesia, decreases oxygen consumption, reduces dyspnea, prevents patient self-injury, induces sleep, creates patient unawareness, improves long-term psychiatric outcomes, permits delivery of efficient care, reduces nursing stress while ensuring nursing safety, and increases family acceptance of ICU care.

Prevention of Pain and Anxiety

Adequate sedation prevents discomfort and anxiety experienced by critically ill patients.

Patient-Ventilator Synchrony

Sedation improves coordination between the patient and mechanical ventilator.

Neurocognitive Outcome Improvement

Adequate sedation minimizes adverse outcomes such as depression and PTSD.

Complications of Over-Sedation

Increased ICU stay, prolonged mechanical ventilation, impaired neurological assessment, ICU-acquired weakness, delirium, and other complications.

Prolonged Sedation

Can lead to ICU-acquired weakness, delirium, prolonged ventilation, and delayed recovery.

Incidence of Pain in ICU Patients

Pain is common in ICU patients, with 11–80% experiencing pain during their ICU stay.

ICU Pain Experience

Many patients remember pain as the most traumatic part of their ICU experience even months after discharge.

Importance of Pain Management

Essential for improving patient outcomes and minimizing chronic pain and PTSD, especially in patients with cardiac surgery or trauma.

Sources of Pain in ICU

Recent surgery, pre-existing disease, monitoring devices, invasive tubes, nursing care activities, procedures, and immobilization.

Recent Surgery

A common source of acute pain in ICU patients.

Pre-existing Disease

Conditions present before ICU admission that may contribute to pain.

Monitoring Devices as Pain Sources

Central lines, pulmonary artery catheters, endotracheal tubes, drains, and urinary catheters may cause discomfort and pain.

Nursing Care as a Pain Source

Suctioning, dressing changes, and immobilization can stimulate pain.

Procedural Pain Sources

Chest tube removal, abdominal surgery, and other invasive procedures.

Nociceptors

Usually free nerve endings located widely in the superficial layers of the skin, peritoneal surfaces, periosteum, arterial walls, pleural surfaces, joint surfaces, and falx and tentorium of the cranial vault.

Function of Nociceptors

Non-adapting receptors that keep humans constantly informed of the continuous presence of painful stimuli that can damage tissues.

Pain Perception

Requires stimulation of nociceptors.

Mechanical Stimulus

Pressure, squeeze, and pin prick.

Thermal Stimulus

Heat and freezing temperature.

Chemical Stimulus

Collectively called the “P factors” including bradykinin, serotonin, histamine, prostaglandin, and substance P.

Chemical Substances that Stimulate Nociceptors

Serotonin, histamine, potassium ions, acids, enzymes, and substance P.

Pain Fibers

The precise mechanism of pain transmission and perception is unknown.

A-Delta Fibers

Fibers associated with fast, sharp, acute pain.

Type C Fibers

Fibers associated with slow, chronic, aching pain.

Acute Pain

Pain typically associated with an injury or procedure.

Chronic Pain

Pain persisting beyond the normal healing period.

Nociceptive Pain

Pain caused by tissue damage.

Neuropathic Pain

Pain resulting from nerve damage.

Gate Control Theory by Melzack and Wall

Peripheral nerve fibers carrying pain to the spinal cord can have their input modified at the spinal cord level before transmission to the brain.

Small-Diameter Nerve Fibers

Carry pain stimuli through the same gate.

Large-Diameter Nerve Fibers

Carry non-pain impulses through the same gate and inhibit transmission of pain impulses, closing the gate.

Pain Gate Location

Substantia gelatinosa cells in the dorsal horn of the spinal cord.

Peripheral Site of Pain Modulation

Pain can be reduced or modified at the peripheral site of pain.

Spinal Cord Pain Modulation

Pain transmission can be modified at the spinal cord level.

Brainstem Pain Modulation

Brainstem mechanisms can modify pain perception.

Cerebral Cortex Pain Modulation

Cognitive processes such as reducing anxiety and teaching patients about pain can decrease pain perception.

Touch Fiber Stimulation

Rubbing, stroking, massage, vibration, and application of liniments and ointments can reduce pain transmission.

Endogenous Opioids

Enkephalins, endorphins, and dynorphins are neuromodulators with morphine-like actions that reduce pain.

Electrical Stimulation

Electrical stimulation of sensory nerve fibers inhibits pain.

Sensory Competition

Music, heat, cold, imagery, and distractions such as video games compete with pain stimuli.

Cognitive Pain Control

Reducing anxiety and helping patients feel capable of controlling pain decreases pain perception.

Principles of Pain Management

Anticipate pain, recognize pain, quantify pain, treat pain, and reassess.

Anticipate Pain

Predict possible sources of pain and provide appropriate interventions.

Recognize Pain

Ask the patient, look for signs, and find the source.

Quantify Pain

Measure the patient’s perception and severity of pain.

Treat Pain

Correct the cause where possible and provide appropriate analgesics regularly as required.

Reassessment of Pain

Evaluate response after interventions.

Important Principle in Sedation

Most sedative agents do not provide analgesia.

Sleep Deprivation

Pain can interfere with normal sleep patterns.

Agitation

Pain can contribute to restlessness and agitation.

Splinting

Protective restriction of movement caused by pain.

Stress Response

Pain stimulates the autonomic nervous system and releases humoral factors.

Cardiovascular Effects of Pain

Tachycardia, hypertension, increased myocardial oxygen consumption, myocardial ischemia, and infarction.

Hypercoagulability from Pain

Increased factor VIII, fibrinogen, platelet activity, and inhibition of fibrinolysis.

Immunosuppression from Pain

Reduction in number and function of granulocytes and lymphocytes.

Catabolism from Pain

Increased metabolic breakdown.

Psychological Effects of Pain

Vivid nightmares, hallucinations, and paranoid delusions.

Non-Pharmacologic Pain Interventions

Proper positioning, stabilization of fractures, elimination of irritating stimulation, and proper positioning of ventilator tubing.

Proper Patient Positioning

Helps decrease discomfort and prevent unnecessary pain.

Ventilator Tubing Positioning

Prevents traction on the endotracheal tube.

Most Reliable and Valid Indicator of Pain

Patient response and self-report.

Pain Assessment Requirement

Patient should be awake if possible.

Subjective Pain Assessment

Assessment based on the patient’s report of pain.

Objective Pain Assessment

Assessment based on observable behaviors, especially in non-verbal patients.

PQRSTU Mnemonic

A tool used for assessing pain characteristics.

P – Provocative/Palliative Factors

Factors that worsen or relieve pain.

Q – Quality

Description of the pain.

R – Region/Radiation

Location and spread of pain.

S – Severity

Intensity of pain and associated symptoms.

T – Timing

Onset, duration, and pattern of pain.

U – Understanding

Patient’s understanding of the pain.

Verbal Rating Scale

Patient describes pain intensity using terms such as no pain, mild, moderate, severe, very severe, and worst possible pain.

Visual Analog Scale (VAS)

A chart depicting intensity of pain.

Numeric Rating Scale (NRS)

Pain scale from 1–10 depending on intensity.

CPOT (Critical Care Pain Observation Tool)

Behavioral assessment pain scale for patients unable to verbalize pain.

Purpose of CPOT

Used to assess pain in non-verbal or sedated ICU patients.

CPOT Components

Facial expression, body movements, muscle tension, and compliance with ventilator or vocalization.

CPOT Scoring

Each behavior is rated from 0–2 with a total score ranging from 0–8.

Behavioral Pain Scale (BPS)

A tool used to evaluate pain based on facial expression, body movement, and muscle tension.

CPOT (Critical Care Pain Observation Tool)

A behavioral assessment pain scale for patients unable to verbalize pain. It includes evaluation of four different behaviors: facial expressions, body movements, muscle tension, and compliance with the ventilator for mechanically ventilated patients or vocalization for non-intubated patients.

CPOT Score Range

Each behavior is rated from 0 to 2 with a total score ranging from 0 to 8.

CPOT Purpose

To assess pain in patients unable to communicate verbally, especially critically ill and sedated patients.

Facial Expression in CPOT

One of the best behavioral indicators for pain assessment.

Facial Expression Score 0

No muscle tension observable in the patient’s face.