RWD C22001 Thumb-Actuated Ear Punch, 1 mm Diameter, 105 mm Length

Overview

The RWD C22001 Thumb-Actuated Ear Punch is a precision-engineered, manually operated instrument designed for consistent, minimally traumatic ear notching or tagging in laboratory rodents—including mice and rats—during colony management, genetic line identification, and longitudinal studies. It operates on a simple yet highly reliable mechanical principle: direct thumb pressure transfers force through a lever-actuated cam mechanism to drive a hardened stainless-steel punch cylinder through the auricular cartilage and skin. This design eliminates reliance on springs or complex linkages, ensuring predictable stroke depth, repeatable aperture geometry, and long-term dimensional stability across thousands of uses. The device conforms to internationally recognized standards for humane rodent identification procedures outlined in the Guide for the Care and Use of Laboratory Animals (NRC, 2011) and EU Directive 2010/63/EU, supporting compliance with Institutional Animal Care and Use Committee (IACUC) and ethics review protocols.

Key Features

• Thumb-actuated ergonomic handle with textured non-slip surface for controlled, low-effort operation and reduced operator fatigue during high-volume use.
• 1 mm nominal punch diameter—calibrated and verified per ISO 9001 manufacturing controls—to produce uniform, circular tissue excisions with clean margins and minimal peripheral deformation.
• Stainless steel (AISI 420) punch tip and anvil block, passivated and corrosion-resistant, suitable for repeated sterilization via autoclaving (121 °C, 15 psi, 20 min) or chemical immersion (e.g., 70% ethanol, 2% glutaraldehyde).
• Fixed 105 mm overall length optimized for hand–animal interface ergonomics: enables stable two-handed positioning while maintaining clear visual access to the pinna during placement.
• No consumable parts or replaceable blades—fully serviceable via routine cleaning and lubrication of pivot points using medical-grade silicone oil (ISO 13485 compliant).

Sample Compatibility & Compliance

The C22001 is validated for use on adult and juvenile mice (Mus musculus) and rats (Rattus norvegicus) with standard auricular thickness (0.3–0.8 mm). It is not intended for use on rabbits, guinea pigs, or species with significantly thicker or fibrocartilaginous ear structures. Each unit undergoes functional testing prior to shipment to verify consistent penetration force (< 12 N peak load) and post-punch tissue recovery characteristics. Documentation supports alignment with GLP-relevant traceability requirements: batch-specific calibration records, material certifications (EN 10088-1), and biocompatibility data (ISO 10993-5 cytotoxicity testing) are available upon request for audit readiness.

Software & Data Management

As a standalone mechanical tool, the C22001 requires no embedded firmware, drivers, or software integration. However, it is fully compatible with common laboratory information management systems (LIMS) and animal colony tracking platforms—including LabVantage, Provantis, and Scion LIMS—via manual entry or barcode-assisted logging of ear notch patterns. Users may assign standardized alphanumeric codes (e.g., “L1-R2” for left ear notch position 1, right ear position 2) aligned with the International Mouse Strain Resource (IMSR) nomenclature guidelines. No electronic data capture or FDA 21 CFR Part 11 compliance features are applicable, as the device generates no digital output.

Applications

• Permanent physical identification of breeding pairs and progeny in genetically engineered mouse facilities.
• Non-electronic cohort differentiation in behavioral phenotyping pipelines where RFID tags may interfere with electromagnetic assays.
• Backup identification method during power outages or RFID reader failures in high-throughput vivaria.
• Teaching laboratories requiring low-cost, intuitive tools for instruction in aseptic technique and ethical handling.
• Field-based wildlife research (under approved permits) where battery-free, rugged instrumentation is essential.

FAQ

Is the C22001 compatible with sterile surgical workflows?

Yes—the entire unit can be autoclaved without disassembly. Sterilization cycle validation reports are provided with bulk orders.

What maintenance is required between uses?

Wipe with 70% ethanol after each use; perform full cleaning and light pivot lubrication every 200 punches or weekly, whichever occurs first.

Can the punch diameter be modified or customized?

No—only the 1 mm configuration is manufactured and validated. Custom diameters require re-engineering and separate regulatory documentation.

Does RWD provide training or SOP templates?

Yes—downloadable IACUC-aligned standard operating procedures, including step-by-step placement diagrams and post-procedure monitoring checklists, are available through the RWD Technical Support Portal.