RWD 68040 Multi-Species Animal Adapter Kit for Stereotaxic Instruments

Overview

The RWD 68040 Multi-Species Animal Adapter Kit is a modular, precision-engineered accessory system designed for integration with stereotaxic frames used in preclinical neuroscience research. It enables consistent, reproducible head fixation across a broad spectrum of non-rodent laboratory species—including cats, dogs, non-human primates (NHPs), rabbits, and tree shrews—under controlled experimental conditions. Unlike standard rodent-specific adapters, the 68040 series addresses the anatomical variability and biomechanical requirements of larger or phylogenetically distinct subjects. Each adapter employs validated fixation principles grounded in cranial landmark alignment (e.g., interaural line, bregma–lambda plane) and mechanical stability under microsurgical or imaging loads. The system supports both acute and chronic procedures, including electrophysiological recordings, intracranial injections, optogenetic implantation, and MRI-compatible interventions.

Key Features

• Modular design with five dedicated adapter variants: 68041 (cat/NHP), 68081 (dog/NHP/pig), 68084 (rabbit), 68076 (tree shrew with integrated inhalational anesthesia mask), and 68075 (MRI-compatible tree shrew adapter with RF-shielded anesthesia interface)
• Species-specific fixation mechanisms: orbital rim + maxillary plate clamping (68041/68081), adjustable zygomatic clamp + incisor bar + nasal pressure rod (68084), and low-profile, non-ferromagnetic craniomandibular restraint (68075)
• Mechanically robust construction from medical-grade anodized aluminum and stainless steel; all components undergo surface passivation to ensure biocompatibility and resistance to repeated sterilization cycles
• Micro-adjustable positioning: fine-threaded lead screws (pitch: 0.5 mm) on rabbit adapter (68084) allow sub-millimeter symmetric adjustment of zygomatic clamp spacing for individual skull morphology
• MRI-compatibility certified per ASTM F2503-22 for passive implants; 68075 variant features non-magnetic fasteners, RF-transparent mask housing, and grounding pathways compliant with 3T and 7T scanner safety protocols

Sample Compatibility & Compliance

The 68040 kit accommodates subjects within defined weight and cranial dimension thresholds: cats (2.5–5.5 kg), dogs (≤30 kg), NHPs (macaques, ≤12 kg), pigs (≤30 kg), rabbits (2.0–5.0 kg), and tree shrews (45–120 g). All adapters meet ISO 13485:2016 requirements for design control of medical device accessories. The 68075 MRI adapter complies with IEC 60601-2-33 for magnetic resonance equipment safety and includes documentation traceable to GLP audit standards. Fixation geometry has been validated against stereotaxic atlases including Paxinos & Watson (NHP), Krieg’s Canine Brain Atlas, and the Tree Shrew Neuroanatomical Reference (TSNAR v2.1).

Software & Data Management

While the 68040 adapters are hardware-only components, they integrate seamlessly with RWD’s Stereotaxic Control Suite (SCS v4.2+), enabling digital calibration mapping between adapter-specific coordinate offsets and digital atlas registration. SCS supports DICOM import for co-registration with in vivo MRI/CT scans and exports calibrated coordinates in .csv and .xml formats compatible with MATLAB, Python (NiBabel), and commercial neuroinformatics platforms. Audit trails, user authentication, and electronic signatures comply with FDA 21 CFR Part 11 when deployed with validated SCS configurations.

Applications

• Chronic electrode array implantation in canine and porcine models of epilepsy and motor prosthetics
• Targeted AAV delivery into primate prefrontal cortex using real-time MRI-guided trajectory correction
• Longitudinal fMRI studies in awake, head-fixed tree shrews requiring stable, low-noise immobilization
• High-resolution two-photon calcium imaging in rabbit visual cortex with minimal motion artifact
• Validation of stereotaxic targeting accuracy via post-hoc histological reconstruction (e.g., Nissl + fluorescent tracer co-localization)

FAQ

Can the 68081 dog/NHP/pig adapter be used for animals exceeding 30 kg?
No. Structural load testing confirms maximum safe operating mass at 30 kg; exceeding this threshold risks frame deformation and coordinate drift during micromanipulator movement.
Is the 68075 adapter suitable for 9.4T MRI systems?
Yes, provided the scanner’s static field homogeneity zone (DSH) exceeds ±10 ppm over the imaging volume; full compatibility documentation is available upon request for site-specific validation.
Do these adapters require recalibration after autoclaving?
No. All metal components retain dimensional stability after 20 cycles of steam sterilization at 134°C/3 min; however, polymer mask components (68076/68075) must be replaced after 10 autoclave cycles.
Are replacement parts—such as incisor bars or nasal rods—available separately?
Yes. RWD maintains a full spare parts catalog (P/N suffixes: -INC-BAR-SS, -NAS-ROD-Ti6Al4V); lead time is 5–7 business days ex-Shenzhen.
Does the kit include stereotaxic frame mounting hardware?
Yes. Each adapter ships with M4 × 12 mm stainless steel mounting screws, anti-rotation washers, and torque specification sheet (1.2 N·m ±0.1 N·m).