Mini Mitter ER-4000 VitalView Physiological Telemetry System

Overview

The Mini Mitter ER-4000 VitalView Physiological Telemetry System is a fully implantable, battery-free wireless telemetry platform engineered for long-term, continuous monitoring of core physiological parameters—including heart rate (HR), core body temperature, and gross motor activity—in conscious, freely moving laboratory animals. Based on patented E-Mitter transponder technology, the system operates on resonant inductive coupling: the external ER-4000 Energizer Receiver supplies power wirelessly to implanted transponders via a low-frequency electromagnetic field, eliminating the need for internal batteries and enabling lifelong data collection without surgical replacement or signal degradation from battery depletion. This architecture ensures high-fidelity, artifact-free measurements under true physiological conditions—free from anesthesia, restraint, or tethering—thereby supporting rigorous preclinical research aligned with Good Laboratory Practice (GLP) standards and regulatory expectations for translational validity.

Key Features

• Battery-free E-Mitter transponders: Hermetically sealed, biocompatible implants integrating sensor, analog amplification, analog-to-digital conversion, and RF transmission in a single miniature package.
• Wireless power delivery: ER-4000 receiver generates a stable 125 kHz excitation field, powering up to four E-Mitters simultaneously while receiving telemetry data from up to 32 transponders per receiver unit.
• Longitudinal study capability: Designed for chronic implantation, supporting uninterrupted data acquisition over months or years—ideal for toxicology, pharmacokinetic/pharmacodynamic (PK/PD), circadian rhythm, and disease progression studies.
• Multi-parameter compatibility: Modular E-Mitter variants available for HR-only, HR + temperature, HR + temperature + activity, or temperature-only configurations—each calibrated per ISO 10993 biocompatibility requirements.
• Scalable infrastructure: Up to 32 receivers can be daisy-chained via RS-232 serial interface to a single host computer running VitalView software, enabling parallel monitoring of >1,000 animals in large-scale facilities.
• Robust signal integrity: Cross-shaped internal antenna design ensures reliable reception across diverse housing environments—including plastic cages (e.g., rodent shoebox) and metal enclosures (e.g., primate or canine pens)—without requiring cage modification.

Sample Compatibility & Compliance

The ER-4000 system supports validated use across murine (mouse, rat), lagomorph (rabbit), feline, canine, non-human primate (NHP), and aquatic (zebrafish) models. All E-Mitter implants are fabricated using USP Class VI-certified biostable polymers and undergo full ISO 10993-1 biological evaluation for cytotoxicity, sensitization, and intracutaneous reactivity. Device performance conforms to IEC 60601-1 (medical electrical equipment safety) and FCC Part 15 Subpart B (unintentional radiator emissions). Data acquisition workflows support ALAC (Association for Assessment and Accreditation of Laboratory Animal Care) compliance and facilitate audit-ready documentation for GLP-regulated studies, including full traceability of calibration records, implant lot numbers, and animal assignment logs.

Software & Data Management

VitalView Software v4000 provides integrated acquisition, visualization, annotation, and automated analysis of telemetric signals. The application supports configurable sampling intervals (1–60 sec), real-time waveform display, batch processing of multi-day datasets, and export to CSV, MATLAB (.mat), or HDF5 formats for secondary analysis. Audit trail functionality complies with FDA 21 CFR Part 11 requirements, capturing user actions, timestamped parameter changes, and electronic signatures. Customizable event detection algorithms identify arrhythmias, fever spikes, or activity bursts; all thresholds and logic rules are fully documented and version-controlled within the software environment. Hardware integration includes support for optional C-9 Y-cables (1 m or 5 m), ER-4 power supply units, and programmable receiver configuration via serial command protocol.

Applications

• Cardiovascular safety pharmacology: QT interval assessment, tachycardia/bradycardia profiling, and autonomic response evaluation in conscious models.
• Thermoregulation and febrile response studies: High-resolution core temperature tracking during immune challenge or drug-induced hyperthermia.
• Circadian biology: Continuous 24/7 monitoring of rest-activity cycles, body temperature rhythms, and heart rate variability (HRV) across light/dark phases.
• Toxicology and repeat-dose studies: Detection of subclinical physiological perturbations preceding histopathological changes.
• Neurobehavioral phenotyping: Correlation of motor activity patterns with CNS-targeted compound administration or genetic manipulation.
• Preclinical biomarker validation: Longitudinal collection of objective, quantitative endpoints for regulatory submission packages.

FAQ

How does the E-Mitter achieve battery-free operation?
The E-Mitter contains no internal power source. It draws energy inductively from the 125 kHz magnetic field generated by the ER-4000 receiver, converting it into operating voltage for sensing, digitization, and RF transmission.
What is the maximum distance between an E-Mitter and the ER-4000 receiver?
Optimal telemetry range is ≤12 cm vertical distance above the receiver surface; horizontal positioning requires ≥30 cm clearance and ≥20 cm vertical headroom for consistent coupling efficiency.
Can one ER-4000 receiver monitor multiple animals simultaneously?
Yes—each ER-4000 supports up to 32 unique E-Mitter IDs concurrently, with up to four active transponders powered at any given time; time-multiplexed polling ensures deterministic latency and full data fidelity.
Is VitalView software compatible with Windows 10/11 and 64-bit architectures?
Yes—VitalView v4000 is natively compiled for 64-bit Windows OS environments and supports TLS 1.2+ secure communication protocols for networked installations.
Are E-Mitter implants reusable?
No—E-Mitters are single-use, sterilized devices intended for terminal or longitudinal implantation; reuse violates biocompatibility certification and compromises measurement integrity.