Quantification of tremor severity with a mobile tremor pen

Area of Science:

• Neurology
• Biomedical Engineering
• Medical Devices

Background:

• Objective tremor severity evaluation is crucial for disease progression monitoring, treatment efficacy assessment, and clinical trials.
• Existing objective quantification devices are often complex, immobile, or lack validation.

Purpose of the Study:

• To evaluate the TREMITAS-System, a novel pen-shaped sensor, for objective tremor quantification.
• To compare tremor amplitude measurements between wearable and handheld configurations.
• To assess the system's ability to detect treatment-induced changes in tremor.

Main Methods:

• Utilized the TREMITAS-System with surrogate markers (Power of Main Peak, Total Power) for tremor amplitude.
• Assessed tremor severity in 14 Parkinson's disease (PD) and 16 Essential Tremor (ET) patients using TREMITAS, MDS-UPDRS, and TETRAS scales.
• Compared measurements in both off- and on-therapy states and evaluated handheld versus wearable sensor positions.

Main Results:

• Significant correlations found between TREMITAS tremor amplitudes and MDS-UPDRS (PD) and TETRAS (ET) scores.
• The TREMITAS-System detected L-Dopa-induced tremor improvement in PD patients (p=0.027).
• No significant difference in tremor amplitude measurements between handheld and wearable configurations (p>0.05).

Conclusions:

• The TREMITAS-System effectively quantifies rest tremor in PD and postural tremor in ET.
• It is capable of detecting clinically relevant tremor changes in both clinical and research settings.
• The system offers a validated, objective method for tremor assessment, usable in various configurations.