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Auto*Therm 390x

Since 1968 Mettler Electronics has produced shortwave diathermy (SWD) unit that produces comforting deep heat in muscle tissues. Shortwave diathermy is used when the clinician needs to provide deep heat to a larger area than normally covered by ultrasound. The illustration below shows the relative penetration of various heating modalities.

CE 0537 and ETL Mettler logo


Auto*Therm® 390x combines the ME 390 with an arm, inductive coil applicator and heavy-duty cart with ample storage space. Using this model, you will be able to choose from two different modes of application—the deep penetration of inductive coil diathermy or the shallower capacitive style with the soft-rubber plates.

Weight: 60 lbs., (27.3 kg)
Dimensions: 37 in (H) x 19 in (W) x 19 in (D), ((95 cm (H) x 48 cm (W) x 48 cm (D))
Warranty: 2 years, one year on applicators and accessories

Spec Sheet

Q: Why would I use diathermy over ultrasound?
A: Ultrasound is very effective for treating small specific areas where diathermy treats a much larger surface area and penetrates much deeper.

Q: Is diathermy reimbursed?
A: Yes, diathermy has its own CPT code.

Q: What is the difference between the 390 and the 390x?
A: The 390 is the portable version that utilizes rubber plate capacitive electrodes. The 390x is the full version that includes the unit, treatment cart, arm, and coil induction drum applicator.

Q: What is the difference between the capacitive applicators and the drum applicator?
A: The capacitive applicators are used for shallow penetration and the induction drum is used for deep penetration.

Q: Do we have to isolate our diathermy unit in a separate room like in the old days?
A: No. With today’s technology and safety requirements, diathermy does not have to be isolated.

Q: Do I still have to worry about metal objects in the body when using diathermy?
A: When using the continuous mode, metal has the tendency to heat up in the surrounding area. In the pulsed mode, the unit does not have the capability to heat metal.

Q: Can diathermy be treated over the patients clothing?
A: We recommend that you remove the clothing around the treatment area and use a terry cloth towel directly on the skin. You then place the drum directly on the towel.

Q: What is pulsed diathermy used for?
A: Just like pulsed ultrasound you will get the mechanical effects of diathermy without having any thermal properties.

Q: what is the biggest advantage of diathermy?
A: Diathermy treats a much larger surface area as well as having much deeper penetration levels than other thermal modalities. Diathermy is also the only unattended modality in the country allowing the clinician to attend to other patients while the treatment is running.

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