Cone-shaped Small Animal Anesthesia Mask (RWD Model 68634)
| Brand | RWD |
|---|---|
| Origin | Shenzhen, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | 68634 |
| Pricing | Available Upon Request |
Overview
The RWD Cone-shaped Small Animal Anesthesia Mask (Model 68634) is an engineered component of a comprehensive small animal surgical anesthesia workstation, designed for precise delivery and containment of inhalational anesthetics during rodent and lagomorph procedures. It operates on the principle of controlled gas flow dynamics within a semi-enclosed conical chamber, where anatomically contoured geometry ensures optimal airway alignment and minimal dead space—critical for maintaining stable anesthetic depth and reducing rebreathing of exhaled CO₂. The mask integrates directly with the RWD Small Animal Surgical Platform (300 × 210 × 75 mm), enabling vertical height adjustment to accommodate varying animal sizes—from neonatal mice to adult rats—and ensuring consistent facial seal without excessive pressure on craniofacial structures.
Key Features
- Adjustable vertical positioning mechanism allows fine-tuned alignment of the conical aperture relative to the animal’s nares and oral cavity, supporting reproducible induction and maintenance phases.
- Integrated platform-side threaded fixation points enable secure limb restraint using standard stainless-steel screws and adjustable restraints—minimizing involuntary movement while preserving peripheral circulation and nerve integrity.
- Bowl-shaped occlusive lid forms a partial enclosure over the mask, establishing a defined gas boundary layer that enhances anesthetic concentration stability and reduces environmental dispersion.
- Dedicated bottom-mounted exhaust port (standard 1/4″ NPT or ISO 5356-1 compatible) connects directly to active scavenging systems, enabling continuous negative-pressure evacuation of waste anesthetic gases (WAGs) at flow rates ≥ 45 L/min per ISO 10993-1 and ACGIH TLV® guidelines.
- Autoclavable polycarbonate construction ensures compatibility with standard sterilization cycles (121°C, 15 psi, 20 min), supporting GLP-compliant reuse across longitudinal studies.
Sample Compatibility & Compliance
The cone-shaped mask is validated for use with C57BL/6, BALB/c, Sprague-Dawley, and New Zealand White subjects weighing 15–500 g. Its geometry conforms to NIH Office of Laboratory Animal Welfare (OLAW) recommendations for minimizing respiratory resistance and avoiding tracheal compression. All materials comply with USP Class VI biocompatibility standards and are free of leachable plasticizers. The system supports adherence to OSHA 29 CFR 1910.134 (respiratory protection) and NIOSH Alert No. 2016-108 regarding WAG exposure mitigation. When used with certified scavenging equipment, the setup meets ISO 8573-1:2010 (compressed air purity) and ASTM F2754-22 (anesthetic gas scavenging system performance) requirements.
Software & Data Management
While the mask itself is a passive hardware component, it is fully interoperable with RWD’s integrated anesthesia monitoring platforms—including the RWD Anesthesia Delivery System (ADS-2000) and optional Capnograph Module (RWD-CAP-01). These systems provide real-time visualization of end-tidal isoflurane concentration (%), respiratory rate (bpm), and capnographic waveform morphology. Audit trails, user access logs, and parameter change timestamps are recorded in accordance with FDA 21 CFR Part 11 and EU Annex 11 requirements when paired with validated LIMS or ELN environments.
Applications
- Induction and maintenance of inhalational anesthesia in stereotaxic surgery, fMRI preparation, and intracerebral injection protocols.
- Long-duration electrophysiology experiments requiring stable physiological parameters and low ambient anesthetic contamination.
- Toxicology and pharmacokinetic studies where precise dose–response relationships depend on consistent anesthetic delivery kinetics.
- Teaching laboratories conducting accredited veterinary or biomedical training modules aligned with FELASA Category C certification standards.
- Preclinical imaging workflows (e.g., micro-CT, PET/MRI) demanding motion-free acquisition windows under stable anesthetic conditions.
FAQ
Is this mask compatible with non-RWD anesthesia vaporizers?
Yes—the conical interface and exhaust port conform to ISO 5356-1 tapered fittings and standard 1/4″ NPT connections, permitting integration with Datex-Ohmeda, Draeger, and Matrx vaporizer systems.
Can the mask be used for spontaneous breathing or only with mechanical ventilation?
It supports both modes; the low-resistance design maintains tidal volumes ≥ 0.5 mL/g in spontaneously breathing rodents and interfaces seamlessly with RWD’s rodent ventilator (Model 68635) via inline T-connectors.
What cleaning agents are recommended for routine decontamination?
70% isopropyl alcohol, enzymatic cleaners (e.g., Enzol), or 0.5% sodium hypochlorite solutions—avoid chlorinated solvents or phenol-based disinfectants to prevent polycarbonate stress cracking.
Does the system meet requirements for IACUC protocol submissions?
Yes—documentation package includes material safety data sheets (MSDS), biocompatibility reports, and WAG scavenging efficiency validation data suitable for institutional animal care and use committee review.
