Modalities

Heat therapy (Thermotherapy)

Thermotherapy involves the application of heat to body tissues to increase circulation, metabolic rate, and tissue extensibility. It is commonly used to manage pain, muscle spasm, and joint stiffness in subacute and chronic conditions.

Types of thermotherapy:

• Hot packs: Moist heat applied with Hydrocollator packs wrapped in towels
• Paraffin wax baths: Commonly used for distal extremities (e.g., hands, feet)
• Fluidotherapy: Dry heat through suspended cellulose particles
• Shortwave diathermy: Deep heating through electromagnetic energy

Clinical indications:

• Muscle spasm and guarding
• Joint stiffness and decreased ROM
• Chronic musculoskeletal pain
• Increased blood flow for tissue healing

Application parameters:

• Hot packs: 15–20 minutes, use 6–8 towel layers to avoid burns
• Paraffin: 10–15 minutes using the dip-wrap method (5–10 dips)
• Diathermy: Typically 20 minutes for deep heating effects

Contraindications:

• Acute inflammation or bleeding
• Impaired sensation or mentation
• Malignancy in treatment area
• Deep vein thrombosis (DVT)
• Open wounds or infections

Cold therapy (cryotherapy)

Cryotherapy is the application of cold to reduce inflammation, pain, and muscle spasm, particularly in acute and post-surgical conditions. Sensations experienced are in the order of cold, burning, aching, numb (CBAN) numbness achieves analgesia.

Types of cryotherapy:

• Ice massage: Applied directly on a localized area, fastest tissue cooling 5-8 minutes
• Ice packs: Applied with a barrier for 10–15 minutes
• Cold immersion baths: Typically 50–60°F (10–15°C), 10–15 minutes
• Vapocoolant sprays: Used for muscle spasm, applied with 2–4 sweeps

Clinical indications:

• Acute musculoskeletal injuries
• Edema control
• Spasticity management
• Localized pain relief

Contraindications:

• Cold hypersensitivity or intolerance
• Raynaud’s disease
• Open or infected wounds
• Peripheral vascular disease (PVD)

Therapeutic ultrasound (US)

Ultrasound uses high-frequency sound waves to produce thermal or non-thermal effects for tissue healing, pain reduction, and increased extensibility of soft tissues.

Clinical indications:

• Chronic tendinopathies
• Ligament sprains and muscle strains
• Joint contractures
• Scar tissue management

Application parameters:

• Frequency:
  • 1 MHz: For deep tissue (up to 5 cm)
  • 3 MHz: For superficial tissue (1–2 cm)
• Duty cycle:
  • 100% (Continuous): Thermal effects
  • 20–50% (Pulsed): Non-thermal, acute phase
• Intensity:
  • 0.5–1.0 W/cm²: Superficial
  • 1.0–2.0 W/cm²: Deep tissues
• Duration:
  • 5–10 minutes per treatment area

Contraindications:

• Over malignant areas, reproductive organs
• Over pacemakers, eyes, or carotid sinus
• During pregnancy (lumbar/abdominal regions)
• Over bony prominence, growth plates, and acute bony fracture.

Electrical stimulation (E-stim)

E-Stim involves the use of electrical currents to stimulate nerve or muscle function for various therapeutic goals.

Types and indications:

• TENS (transcutaneous electrical nerve stimulation): Pain modulation via gate control theory (high rate), Endogenous opioid theory (EOT) low rate.
• NMES (neuromuscular electrical stimulation): Muscle re-education, strengthening using biphasic wave form creating a zero net charges to reduce skin irritation.
• **IFC (interferential current):**Uses an interference between two medium frequency (KHz) currents produces a low frequency (beat) current that will be induced in the deep tissues. Effects are similar to TENS
• HVPC (high-voltage pulsed current): Wound healing, with positive polarity, edema control with negative polarity.
• DC (direct current): Iontophoresis for transfer of Ions in solution edema control with negative polarity, and pain control positive polarity. Treatment is dosed in Milliamperes/min (mA/min)

Parameters:

• TENS: 50–150 Hz, 50–80 µs, continuous mode (Gate theory)
• TENS: 1-4 Hz, 150–220 µs, low pulse mode (Endogenous opioid theory)
• IFC: 2 high frequency channels, 3000, and 3500 (Khz) creating an interference wave of 1-299 hz in deeper tissues.
• NMES: 35–50 Hz, 200–400 µs, 1:5 duty cycle
• HVPC: 100–150 V, 50–100 Hz

Contraindications:

• Cardiac pacemakers or defibrillators
• Unstable arrhythmias
• Thrombophlebitis or DVT
• Pregnancy (abdomen/lumbar)

Traction

Mechanical traction is used to relieve pressure on the spinal structures and improve joint mobility.

Clinical indications:

• Herniated discs
• Nerve root impingement
• Hypomobility or facet joint dysfunction

Parameters:

• Static/intermittent:

  • Static best for disc and nerve root impingement
  • Intermittent best for hypomobility

• Cervical traction:

  • Initial force: 10–15 lbs
  • Maximum: 30 lbs
  • Angle: 15–20° flexion for upper cervical spine using over the door TMJ halter seated
  • Angle: 25–35° flexion for lower cervical spine using and occipital halter in supine
  • Duration: 10-15 minutes

• Lumbar traction:

  • Initial force: 25% of body weight
  • Maximum: 50% of body weight
  • Supine position best for upper lumbar segments and hypomobility
  • Prone position best for lower lumbar and disc herniation
  • Duration: 15-20 minutes

Contraindications:

• Acute cervical or lumbar injuries
• Spinal infections or malignancy
• Hypermobility or instability
• Severe osteoporosis