Secondhand Chattanooga Artromot K4 Knee and Hip CPM Device

Objective AI Report

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Report date: 23.08.2025

Artromot K4 CPM Device Analysis Report

Overview and Device Description

The product under review is a Continuous Passive Motion (CPM) device used for the rehabilitation of knee and hip joints. These devices are typically used in physiotherapy processes to accelerate the recovery period after orthopedic surgery, prevent joint stiffness, and restore range of motion. The visuals show one main device and one wired hand control unit connected to the device.

Brand and Model Information

Upon detailed examination of the visuals, the brand and model information is clearly legible on the base of the device and on the hand control unit. The product’s brand is Artromot, and its model is K4. This information has been confirmed in multiple visuals.

Physical Condition and Deformation Analysis

The general condition of the device is assessed as used, and there are visible signs of wear and tear resulting from intensive use.

• Plastic Components: There is a noticeable yellowing and discoloration on the device’s beige plastic main body and base. This condition may indicate the age of the device or prolonged exposure to light. There is also general dirtiness and some small scratches on the surface.
• Pads and Fabrics: The most prominent deformation of the device is observed in the blue fabric pads where the patient’s leg makes contact. The surface of the pads has numerous holes, tears, and unraveling. Specifically, the yellow sponge material inside the upper pad has emerged through these tears. The fabric colors are faded and have a generally dirty appearance.
• Straps and Tapes: The white hook-and-loop (Velcro) straps used to secure the leg appear worn, and additional cloth or tape has been wrapped around them. This suggests that the original fastening mechanisms may have lost their effectiveness.

Mechanical and Electronic Component Evaluation

No breaks or cracks are observed in the mechanical components such as adjustment levers, metal slide rails, and movable joints. Regarding the electronic components, a visual clearly shows that the screen of the hand control unit connected to the device is functional. The screen displays numerical values like “-1°” and “6°” and arrows indicating the direction of movement. This indicates that the device’s basic electronic circuits and screen are functional. There are no visible crushes or breaks in the coiled and power cables connected to the device.

Label and Code Information

The following information is present on a white label located on the base of the device:

• Model Information: ARTROMOT-K4
• Code/Number: 11843
• Barcode Number: 800015711843

Apart from this label, standard label information such as serial number (SN), REF code, or Lot number could not be identified in the visuals.

Accessory Status

Other than one hand control unit and one power cable, which are necessary for the device’s operation and are connected to the device via cables, no additional accessories (such as a carrying bag, user manual, extra pads, etc.) are visible in the visuals.

Current and Potential Risk Assessment

The most significant existing issue with the device is the severe wear and tear and rips on the leg support pads. This condition may negatively affect both user comfort and hygiene. Replacement of the pads and worn fastening straps may be required. The yellowing of the plastic casing is an aesthetic flaw and does not directly affect the device’s operation. Although the electronic components of the device appear functional, considering the extensive physical wear, it cannot be guaranteed that all functions are working flawlessly based solely on the visuals. However, there is no clear evidence of a fundamental malfunction, and the device appears to be in working order in its current condition.