FIELD OF THE INVENTION

The present invention relates generally to cold therapy devices. More particularly, the invention relates to a self-contained, mobile cold therapy device that can be worn on the body of the user leaving him or her hands-free and able to ambulate while still receiving cold therapy.

BACKGROUND

Cold therapy is often prescribed for relief and/or control of inflammation, among other ailments. Often, to apply cold therapy to a user, the options for the user are limited. Ice packs or gel packs are often utilized but also pose several issues. For example, the duration of cold provided by ice or gel packs is limited, where, if extended periods of therapy are desired, the user must either use a very large pack, or replace the pack periodically. Further, it is difficult to control the temperature of such packs. For example, if the pack is simply applied to a patient, the fluid in the pack immediately adjacent the user may warm, requiring the user to shake or massage the pack to maintain a constant cooling temperature. These options can be worn and allow the user to ambulate, but do not involve circulating water, which gives a more consistent and constant temperature.

In physical therapy in-clinic applications, there are conventional electronic cold therapy devices that are heavy and bulky. Such devices require AC wall-socket power so they are not meant to be worn on the patient's body to permit freedom to ambulate.

SUMMARY OF THE INVENTION

The present invention in preferred embodiments is directed to a self-contained, mobile cold therapy device worn on a patient-user's body that enables the user to ambulate hands-free while receiving cold therapy to his or her injured region. The device includes a container including a thermally-insulated tank and a cold therapy liquid disposed in the tank. The preferred cold therapy liquid is below ambient temperature ice water.

The device further includes a cold therapy pad worn on the user's body, wherein the pad includes a thermal conduction surface engaging the user's body; at least one nipple protruding through the thermal conduction surface; a first air bladder disposed underneath the thermal conduction surface and engaging to the nipple, wherein the first air bladder is inflated to extend the nipple above the thermal conduction surface and is deflated to retract the nipple into the thermal conduction surface; a liquid bladder disposed underneath the thermal conduction surface; a second air bladder overlying and contiguous with the liquid bladder such that when inflated applies a compressive pressure on the liquid bladder.

The device further includes one or more liquid pumps disposed proximate or inside the container to circulate the liquid; one or more air pumps disposed proximate or inside the container; tubing interconnecting the liquid pump to the liquid bladder, and interconnecting the air pump to the first and the second air bladders; an electronic or digital controller and user interface disposed on the container and electrically wired to the air and liquid pumps; a battery pack powering the digital controller, the air pump, and the liquid pump; and a holder supporting the container on the user's body to enable the user to freely ambulate and with both hands free to engage in daily activity.

The cold therapy pad may be worn on the body and held in place using an elastic strap, swath, or wrap, or may be inserted into an orthopedic brace already prescribed for the user. The reciprocating nipple, pressed into the user's injured region, is driven by inflating and deflating the first air bladder. This reciprocating action of the nipple and/or air bladder helps massage the injured region and further reduces edema.

On board digital electronics monitor and control the air and liquid pumps to actuate one or the other or both. Thus, the device may have just the liquid therapy ongoing, or just air compression via the air bladder inflation, or both. Telemetry from the user and the device is collected by the digital electronics and sent through Wi-Fi, Bluetooth and the like to the internet, or to a smartphone or laptop. As such, the user or his or her care provider can monitor the cold therapy progress and provide feedback or administer control to the user or the device.

