Which is not a deep heat therapy-

Heat therapy Heat therapy is a form of physiotherapy used in many painful conditions eg. arthritis, sprains, muscle spasms etc. It is of 2 types depending on the penetration of heat Superficial heat therapy Deep heat therapy A) Superficial heat therapy Only the skin and subcutaneous tissues are heated Superficial heating modalities do not heat deep tissue because the subcutaneous layer of fat beneath the skin surface acts as a thermal insulator and inhibits heat transfer. Superficial heating modalities include : Hot warm bottle                                                                                                       Warm bath                                                                                                               Hot packs (eg. Kenny pack) Hot soaks or compresses Paraffin wax bath                             Moist air cabinet Chemical packs Infrared lamp B) Deep heat therapy Deeper structures (including muscles) are heated In general, the transfer of heat is of three types- conduction, convection & conversion (or radiation) Whereas superficial heating modalities use all three modes of transfer of heat; deep heating modalities use only conversion or radiation method to heat the deep tissues. Deep heating modalities are a) Shortwave diathermy Heat generated by high-frequency alternating current using a shortwave diathermy emitter. b) Microwave diathermy This uses electromagnetic radiation energy to heat the deep tissues c)   Ultrasound therapy Uses high-frequency sound energy