Making Sleep Movement Monitoring Accessible to Every Clinician and Patient
Leg movements fragment sleep and are linked to higher risks of heart disease, stroke, and depression. We deliver continuous, objective monitoring to transform clinical care and research.
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Clinical Sleep Care
Objective, Multi-Night Data
Ambulatory leg movement data to support diagnosis and to follow how patients respond to treatment over time.
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Pediatric & ADHD Focus
Comfortable, At-Home Recording
Help clinicians detect and treat the nocturnal movement disorders that often go unrecognized in children evaluated for ADHD.
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Translational Research
High-Fidelity Biomarkers
Equip researchers with multi-night ambulatory tools to uncover new links between sleep motor activity and health.
Our Story
Founded to Advance Research into Leg Movements During Sleep
Tanzen Medical was founded through a collaboration of UMBC engineering professors and Johns Hopkins sleep physicians. Our goal has always been to create an accessible method for multi-night characterization of leg movements during sleep (LMS), to aid in the diagnosis and treatment management of sleep-related movement disorders such as RLS and PLMD, including in children evaluated for ADHD.
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Tanzen is German for “to dance.”
Intellectual Property & Research
Protected by Patents, Backed by Peer-Reviewed Science
RestEaze™ is powered by proprietary hardware, algorithmic architecture, and rigorous clinical validation.
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Patented Technologies
4 FILINGS
Capacitive Sensing System
Issued
US 10,228,801 B2
Proximity-based position, movement, and gesture detection using capacitive sensor arrays. Licensed from the University of Maryland.
Periodic Leg Movement Detection
Issued
US 10,335,085 B2
Device and detection methods for periodic leg movements. Licensed from Johns Hopkins University. Pending in CA, AU and KR.
Multi-Sensor Ankle Band
Pending
US 2017/0156640 A1
Body part measurement using integrated capacitive and inertial sensors. Pending in the U.S., EU, CA and KR. Licensed from the University of Maryland.
Peripheral Inflammatory & Infection Detection
Provisional
US 15590001PR
Individualized peripheral inflammatory response detection and monitoring. Owned by Tanzen Medical.
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Peer-Reviewed Publications
8 PAPERS
Sleep awake detection from leg-worn wearables using deep sensor fusion
2026
Anwar Y, Bansal K, Kucukosmanoglu M, Dang Q, Feltch C, Brooks J, Banerjee N.
From university research labs to FDA Breakthrough Device Designation.
2014 – 2021: Research & Foundation
2014
MII Phase I and NSF PFI-AR Grants
Grants from the Maryland Innovation Initiative (MII) and the NSF Partnerships for Innovation program funded prototype development for the multi-sensor ankle band and recording software, and market research for RLS and ADHD diagnosis and management.
2016
Formation of Tanzen Medical Inc.
A collaboration between Johns Hopkins sleep physicians and UMBC engineering professors.
2019
First RestEaze Band Prototype
First prototype of the RestEaze band built, with analytics in the cloud. Raised capital from MII Phase III and an NSF SBIR Phase I award.
2021
FDA Breakthrough Device Designation
Received an FDA Breakthrough Device Designation for RestEaze, and raised angel investment.
2023 – 2026: Clinical Translation & Scale
2023
Generation 2 Device Completed
Data collection at Kennedy Krieger Institute, Johns Hopkins University, Comprehensive Sleep Clinic and UPMC. Received NIH SBIR Phase I and Defense Health Agency (DHA) SBIR Phase I awards.
2025
Manufacturing-Ready System Development
Development started on the manufacturing-ready RestEaze system, including the Generation 3 multi-sensor architecture.
2026
FDA Pre-Submission and De Novo Pathway
FDA pre-submission made and the first pre-submission meeting held to determine the De Novo route.
2026
Peer-Reviewed Validation Published
Peer-reviewed papers in Scientific Reports on sleep–wake detection and cortical arousal detection from leg-worn sensors.
Our Leaders
Leadership Team
Our leadership team brings together experienced technologists, researchers and medical professionals.
Nilanjan Banerjee, Ph.D.
Co-Founder & CEO
Professor of Computer Science & Electrical Engineering
Cody Feltch
Co-Founder & CTO
Embedded Systems & Biomedical Hardware
Justin Brooks, M.D., Ph.D.
Chief Science Officer
Sleep Neurologist & Clinical Researcher
Expert Advisors
Advisory Board
Our advisory board includes leading experts in sleep medicine and business leaders in the medical device industry.
Christopher Earley, M.B.B.Ch., Ph.D.
Professor of Neurology, Johns Hopkins University
Researches the pathophysiology and pharmacological treatment of RLS, its overlap with ADHD, and other nocturnal motor disorders.
Daniel Picchietti, M.D.
Clinical Professor of Neurology, University of Illinois & Carle Foundation Hospital
Sleep physician and clinical researcher specializing in pediatric sleep disorders, periodic limb movement disorder (PLMD) and international diagnostic criteria for sleep-related movement disorders.
Michael Smith, Ph.D.
Professor of Neurology, Johns Hopkins University School of Medicine
Clinical psychologist and director of behavioral sleep medicine, researching the mechanisms that connect chronic pain, fragmented sleep and insomnia.
Michael Thomas
Medical Device & MedTech Executive
Commercialization strategist and digital health leader with experience bringing diagnostic technologies through FDA clearance and into clinical use.
Professor of pediatrics leading research on Restless Sleep Disorder (RSD), childhood sleep movement disturbances and objective nighttime measures.
Ryan Robucci, Ph.D.
Associate Professor of Computer Engineering, UMBC
Directs research on embedded sensing systems, ultra-low-power biomedical circuits and real-time signal processing.
Expert Opinions
What Are Experts Saying About RestEaze?
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"As you know there are many children who have very restless sleep including many with ADHD and RLS. [RestEaze] would help us evaluate both diagnosis and treatment efficacy."
Lourdes M. DelRosso, M.D., MS
Sleep Specialist, Seattle Children's Hospital
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Bring RestEaze™ to Your Clinic or Study
Talk with our team about how multi-night, at-home leg movement monitoring can support your diagnoses, treatment tracking and trial endpoints.
Nilanjan Banerjee, Ph.D.Co-Founder & CEOProfessor of Computer Science & Electrical Engineering
Cody FeltchCo-Founder & CTOEmbedded Systems & Biomedical Hardware
Justin Brooks, M.D., Ph.D.Chief Science OfficerSleep Neurologist & Clinical Researcher
Christopher Earley, M.B.B.Ch., Ph.D.Professor of Neurology, Johns Hopkins University
Daniel Picchietti, M.D.Clinical Professor of Neurology, University of Illinois & Carle Foundation Hospital
Michael Smith, Ph.D.Professor of Neurology, Johns Hopkins University School of Medicine
Michael ThomasMedical Device & MedTech Executive
Lourdes M. DelRosso, M.D., MSSleep Physician & Clinical Specialist, Seattle Children's Hospital
Ryan Robucci, Ph.D.Associate Professor of Computer Engineering, UMBC
