RWD 68601 Stereotaxic Anesthesia Mask for Small Rodents (Passive Gas Recovery)

Overview

The RWD 68601 Stereotaxic Anesthesia Mask is a precision-engineered accessory designed exclusively for integration with stereotaxic frames in preclinical neuroscience and behavioral research laboratories. It functions as a critical interface between the anesthesia delivery system and the restrained rodent subject during intracranial surgical procedures, electrophysiological recordings, or targeted microinjections. The mask operates on standard inhalational anesthetic gas delivery principles—primarily isoflurane or sevoflurane—and is optimized for stable, low-resistance gas flow and minimal dead space to ensure rapid induction and recovery kinetics. Its passive gas recovery configuration routes exhaled anesthetic gas solely through an integrated exhaust port compatible with activated charcoal filtration systems, complying with institutional occupational safety policies and local environmental health regulations governing volatile anesthetic waste.

Key Features

• Modular, low-profile design engineered for unobstructed access to the animal’s skull and cranial sutures during stereotaxic alignment and electrode/cannula placement.
• Medical-grade silicone construction ensures biocompatibility, flexibility, and consistent seal integrity across repeated sterilization cycles (autoclavable up to 121°C, 20 min).
• Integrated 3/8″–24 UNF threaded exhaust port enables secure, leak-tight connection to commercially available gas filtration canisters (e.g., Datex-Ohmeda Amsorb®, Dräger Sorbster®).
• Optimized internal volume (< 1.2 mL) minimizes rebreathing and supports precise control of inspired anesthetic concentration—critical for maintaining stable physiological parameters during prolonged procedures.
• Compatible with standard RWD and third-party stereotaxic holders via universal mounting bracket interface (included).
• Calibrated fit for mice and juvenile rats weighing under 70 g, ensuring ergonomic positioning without airway compression or facial tissue distortion.

Sample Compatibility & Compliance

The RWD 68601 mask is validated for use with C57BL/6, BALB/c, CD-1, and Sprague-Dawley rodents within the specified weight range. It conforms to ISO 10993-1 (Biological Evaluation of Medical Devices) for cytotoxicity and skin sensitization testing. While not classified as a medical device under FDA 21 CFR Part 820, its design aligns with GLP-compliant laboratory practices for in vivo neuroscientific experimentation. Institutions adhering to AAALAC International accreditation standards will find the mask fully compatible with SOPs governing anesthetic gas management, personnel exposure limits (NIOSH REL: 2 ppm isoflurane TWA), and waste gas abatement requirements.

Software & Data Management

As a hardware-only consumable accessory, the RWD 68601 does not incorporate embedded electronics or firmware. However, it interoperates seamlessly with digital anesthesia delivery systems (e.g., VetEquip VMS-100, Kent Scientific E-Z Anesthesia) that support real-time vaporizer output logging, flow rate modulation, and integrated O₂ monitoring. When used in conjunction with compliant data acquisition platforms (e.g., Spike2, MATLAB-based custom scripts), procedural anesthetic exposure duration, flow settings, and recovery timelines may be logged alongside electrophysiological or imaging datasets—enabling traceable, audit-ready experimental metadata per NIH and ERC reporting guidelines.

Applications

• Intracerebral cannulation and viral vector injection in mouse models of neurodegeneration or circuit mapping.
• In vivo two-photon calcium imaging through cranial windows under stable isoflurane maintenance.
• Chronic electrode implantation for longitudinal LFP/MEA recording in juvenile rat cohorts.
• Combined fMRI and electrophysiology studies requiring precise anesthetic titration and minimal motion artifact.
• Teaching laboratories conducting standardized stereotaxic surgery modules under IACUC-approved curricula.

FAQ

Is the RWD 68601 compatible with non-RWD stereotaxic frames?
Yes—the mounting bracket features standardized M4 threaded holes and adjustable clamping geometry, enabling mechanical compatibility with Stoelting, Kopf, and other major-brand frames.
Can this mask be autoclaved repeatedly without degradation?
Yes—medical-grade silicone formulation withstands ≥50 autoclave cycles at 121°C, 15–20 psi, with no measurable change in tensile strength or sealing performance.
What filtration systems are recommended for passive exhaust?
Activated charcoal canisters rated for >95% isoflurane adsorption at 500 mL/min flow (e.g., Puritan Bennett 1000 series, Medline MDS-200) are validated for use with the 3/8″–24 UNF port.
Does RWD provide validation documentation for institutional biosafety review?
Upon request, RWD supplies material safety data sheets (MSDS), ISO 10993 test reports, and dimensional drawings compliant with ANSI/ASME Y14.5 standards for internal protocol submission.