Therapeutic Modalities Test 1

Main purpose of therapeutic modalities

To create an optimal environment for healing and recovery by producing a desired physiological response.

Definition of a therapeutic modality

A form of stress or energy applied to the body to produce an involuntary physiological response.

General Adaptation Syndrome (GAS)

The body's general response to stress, consisting of alarm, resistance, and exhaustion stages.

Resistance stage of GAS

The body adapts to the stressor and attempts to maintain function while coping with continued stress.

Two types of physical trauma

Macrotrauma (single large force) and microtrauma (repeated low-intensity forces).

Effect of physical stress on tissue

Too little causes atrophy; appropriate amount maintains/increases tolerance; excessive causes injury; extreme causes cell death.

Importance of treatment stress

Provides enough stress to create a beneficial response without exceeding tissue tolerance.

Five types of soft tissue

Epithelial, adipose, muscle, nervous, and connective tissue.

Primary injury

Direct destruction or damage to tissue caused by the original traumatic event.

Secondary injury

Additional cell damage or death after initial trauma due to impaired blood flow and cellular damage.

Three phases of tissue healing

Acute inflammatory, proliferation, and maturation.

Duration of acute inflammatory phase

Approximately 0 to 14 days.

Events of acute inflammatory phase

Inflammatory cells migrate, phagocytes remove damage, fibroblasts begin activity, and swelling develops.

Events of proliferation phase

Fibroblast activity increases, collagen is produced, new blood vessels form, and wound contraction occurs.

Duration of maturation phase

Can continue for a year or longer depending on tissue and severity.

Events of maturation phase

Vascularity decreases, and stronger Type I collagen progressively replaces Type III collagen.

Swelling vs. edema

Swelling is general fluid accumulation; edema is excessive fluid and protein in the interstitial space.

Starling's law

Describes fluid movement across capillary walls based on hydrostatic and oncotic pressures.

Influence of treatment on fluid movement

Compression and elevation limit fluid accumulation; cold reduces metabolic demand.

Chronic inflammation

Inflammation persisting beyond the expected normal healing period due to repeated irritation or impaired healing.

Definition of pain

An unpleasant sensory and emotional experience associated with actual or potential tissue damage.

Pain vs. nociception

Nociception is detecting noxious stimuli; pain is the sensory and emotional experience.

Three dimensions of pain

Sensory-discriminative, cognitive-evaluative, and affective-motivational.

Pain threshold

The minimum level of a noxious stimulus needed to alert a person to a potential threat.

Pain tolerance

The greatest amount of pain a person is willing or able to withstand.

Factors influencing pain perception

Past experiences, expectations, mood, culture, personality, and age.

First-order neurons

Carry sensory information from peripheral tissues toward the spinal cord.

Erlanger and Gasser nerve classifications

Peripheral nerve fibers classified into A, B, and C groups based on diameter and myelination.

Second-order neurons

Carry information from the spinal cord toward higher centers via pathways like the spinothalamic tract.

Hyperalgesia

An increased pain response to a stimulus that is normally painful.

Gate Control Theory

Non-nociceptive sensory input inhibits nociceptive transmission at the spinal level.

Descending pain modulation

Higher brain centers activate descending pathways using endorphins to inhibit pain.

Central biasing

A descending pain-control mechanism using serotonin and norepinephrine to inhibit pain transmission.

Chronic pain

Pain persisting beyond the expected normal healing period.

Referred pain

Pain perceived at a location different from the actual source.

Myofascial pain

Pain associated with muscle and fascia involving increased tension and trigger points.

Sympathetically maintained pain

A chronic pain syndrome associated with abnormal sympathetic nervous system activity.

Primary pain control

Removes or reduces mechanical or chemical triggers that activate nociceptors.

Secondary pain control

Interrupts transmission of pain signals or their interpretation in the brain.

Caution in eliminating pain

Removing pain may allow a patient to overload incompletely healed tissue.

Modalities/medications for pain control

Cold, heat, ultrasound, electrical stimulation, and appropriate medications.

Clinical assessment of pain

Patient self-report, location, quality, intensity, duration, and aggravating/relieving factors.

Thermal modalities

Modalities that transfer thermal energy to or from body tissues to change temperature.

Five methods of heat transfer

Conduction, convection, radiation, evaporation, and conversion.

Convection

Heat transfer through movement of a fluid or gas, such as a whirlpool.

Indications for cold

Active acute inflammation, pain control, cryokinetics, and reducing metabolic demand.

Indications for heat

Subacute or chronic conditions when increased tissue temperature, blood flow, or extensibility is desired.

Local responses to cold

Vasoconstriction, decreased metabolism, decreased inflammation, and decreased nerve conduction.

Order of tissue cooling

Skin, underlying tissues, adipose, fascia, then muscle.

Variables affecting tissue cooling

Treatment time, location, tissue type, adipose thickness, and cold application type.

Neurological effects skin temp drop

A decrease of about 9°F (5°C) reduces muscle-spindle sensitivity.

Temperature for maximum cold analgesia

Approximately 58°F (14.4°C).

Sensations during cold application

Cold, burning, aching, then numbness.

Time for cold analgesia

Generally develops after about 18 to 21 minutes.

Effect of cold on cellular metabolism

Decreases metabolic rate and oxygen demand, helping limit secondary injury.

Effect of cold on inflammation

Reduces inflammatory activity, prostaglandin synthesis, and capillary permeability.

Effect of cold on blood vessels

Causes vasoconstriction, decreases local blood flow, and increases blood viscosity.

Does cold remove existing edema?

Not necessarily; it limits formation, but compression and elevation are needed for removal.

Effect of cold on nerve conduction

Decreases conduction velocity and increases depolarization threshold.

How cold reduces pain

Decreases inflammation/swelling and slows nerve conduction of painful signals.

Effect of cold on muscle spasm

Decreases muscle spindle sensitivity and the stretch-reflex response.

Effect of cold on muscle function

Reduces rapid muscle performance; adequate rewarming is needed before intense activity.

Cryokinetics

Combination of cold application and movement to reduce pain for improved range of motion.

Major risks of cold application

Cold injury (frostbite) and superficial nerve injury, especially with compression.

Contraindications to cold

Circulatory insufficiency, DVT, cold urticaria, anesthetic skin, Raynaud's disease, and lupus.

Cautions when applying cold

Use caution near the carotid sinus, over infection, near eyes, and monitor skin response.

Two categories of heat modalities

Superficial heating agents and deep heating agents.

Excessive heat tissue damage

Temperatures above therapeutic range increase tissue injury risk.

Effect of heat on inflammation

Increases blood flow and metabolism; appropriate only after acute inflammation subsides.

Effect of heat on blood flow

Causes vasodilation and increases local blood flow.

Effect of heat on edema

Can assist fluid movement when appropriate, but increases fluid accumulation if acutely inflamed.

Effect of heat on nerve conduction and pain

Alters nerve conduction and reduces pain through sensory stimulation and spasm reduction.

Effect of heat on muscle spasm

Decreases muscle spasm and makes movement or stretching more comfortable.

Effect of heat on tissue elasticity

Temporarily increases extensibility, especially when followed by stretching.

Using exercise to heat tissue

Active exercise increases tissue temperature through metabolic activity and serves as a warm-up.

Contraindications to heat

Acute inflammation, impaired sensation, impaired circulation, and areas where increased blood flow is unsafe.

Common types of cold packs

Ice bags, reusable gel packs, cold compression units, and chemical instant packs.

Cold compression therapy (CCT)

Combines cold with external compression using a contoured sleeve.

Basic setup for CCT

Screen contraindications, add cold water/ice, chill system, apply sleeve securely, and elevate.

When CCT is preferred

When both cooling and compression are desired, such as acute injuries with swelling.

Instant cold pack operation

Uses an endothermic chemical reaction activated by breaking an internal barrier.

Ice massage

Direct application of ice to a small area using slow strokes for rapid cooling.

Usefulness of ice massage

Ideal for small areas like muscle spasms, contusions, or minor soft-tissue injuries.

Ice immersion

Immersion of a body part in cold water for circumferential cooling.

Ice-immersion temperature range

Approximately 50 to 60°F (10 to 15.6°C).

Immersion temperature adjustment

Water should be warmer when immersing larger body areas to avoid systemic cooling.

Cryostretch

Technique combining rapid skin cooling with passive stretching to reduce pain and spasm.

Vapocoolant spray

Spray such as fluoromethane used in cryostretch to rapidly cool skin during stretching.

Whirlpools use

Uses moving water to provide convection and hydrostatic effects while heating or cooling.

Monitoring during whirlpool treatment

Monitor water temperature, duration, skin response, circulation, and systemic effects.

Moist heat pack

Reusable hydrocollator pack heated in hot water and applied with protective towel layers.

Safe application of moist heat packs

Use adequate towel layers, inspect skin frequently, and position comfortably.

When moist heat packs are used

For subacute or chronic conditions before stretching or exercise.

Paraffin bath

Heated paraffin wax container used to heat small, irregular body parts like hands or feet.

When paraffin is useful

For chronic conditions involving small joints or irregular surfaces.

Check before paraffin application

Assess skin integrity and sensation; avoid open wounds or infections.

Contrast therapy

Alternating applications of heat and cold during the same treatment session.

Common contrast-therapy ratios

Using more time in heat than cold, such as 3:1 or 4:1.

When contrast therapy is used

For subacute/chronic conditions when alternating vasodilation and vasoconstriction is desired.