1. Longitudinal: Molecules are displaced in the direction the wave travels. In this wave, areas of high molecular density are called compressions, molecules get squeezed together. Travel in solids and liquids. Rarefaction: lower molecular density molecules spread out.
2. Transverse waves: molecules become displaced perpendicular to the direction in which the wave is moving. Solids such as bone interfaces.
Tissues with high concentrations of collagen such as ligs, m ,tendons, jt. Capsules, jt. Menisci, intermuscular interfaces, NR, periosteum, cortical bone, and other deep tissues which may be selectively heated to the therapeutic range without causing a significant tissue temp increase in the skin or fat.
Direct contact; surface must be larger than the transducer
Immersion: can be used when the treatment area is smaller than the transducer. Treatment area is irregular.
Plastic, ceramic, rubber basin should be used
Move transducer ll to surface you are txing. @ .5 – 1 cm away. Wipe away air bubbles. Intensity should be increased up to 50%
Indications Ultrasound Acute/subacute cond Soft tiss heal/repair Scar tissue Jt.contracture Chr itis Inc collagen extensibility Dec m spasm Pain Inc bl fl Soft tiss repair Inc Pr- syn Tiss regen Bone healing Repair non-union fx Inflamm assoc Myos. Ossificans Plantar warts Myofascial trigger points
Contraindications Acute/post acute cond.(Thermal) Areas of decreased temp sensation Areas dec circ Vasc. Insuff Thrombophleb Eyes Reproductive organs Pelvis immed after menses Pregnancy PPM Malignancy Growing epiphysis TJR Precaution not directly over Infection tumors