RWD 68084 Rabbit Stereotaxic Adapter

Overview

The RWD 68084 Rabbit Stereotaxic Adapter is a precision mechanical interface designed for integration with standard stereotaxic frames—primarily the RWD 68080 series and compatible third-party systems—to enable secure, reproducible head fixation and multi-axis positioning of New Zealand White rabbits and other similarly sized lagomorphs during neuroscientific, pharmacological, or surgical procedures. Engineered for in vivo electrophysiology, intracranial injection, cranial window implantation, and chronic cannula placement, this adapter employs a rigid aluminum alloy construction with anodized surface treatment to ensure dimensional stability, corrosion resistance, and compatibility with autoclaving and alcohol-based disinfectants. Its design adheres to fundamental principles of stereotaxic alignment: orthogonal adjustment axes (vertical, pitch, yaw, and anteroposterior) are mechanically decoupled to prevent coupling errors during fine-tuning, supporting high-fidelity spatial registration relative to standardized rabbit brain atlases (e.g., Paxinos & Watson–derived coordinates).

Key Features

• Vertical (dorsoventral) adjustment range: 30 mm (−20 mm to +10 mm), calibrated to ±100 µm resolution via dual-scale micrometer collar and engraved depth scale
• Pitch adjustment (vertical rotation): ±35° (total 70° range), with 5° incremental detents and friction-locking mechanism to maintain orientation under gravitational load
• Yaw adjustment (horizontal rotation): ±35° (total 70° range), independently actuated with tactile feedback and repeatable zero-reference mark
• Anteroposterior (front-to-back) linear travel: 43.5 mm, facilitated by low-backlash stainless-steel lead screw and reinforced linear guide rails
• Integrated gas anesthesia port: 2 mm inner diameter inlet/outlet tubing interface, positioned to align with standard rodent/rabbit face masks and vaporizer circuits without kinking or flow restriction
• Tool-free mounting system: Compatible with RWD 68080 base plates and ISO-standard M6 threaded mounting holes (center-to-center spacing: 42 mm)

Sample Compatibility & Compliance

The adapter accommodates adult New Zealand White rabbits (2.5–4.5 kg) and Dutch Belted rabbits within standard stereotaxic restraint protocols. Head fixation utilizes adjustable ear bars with silicone-tipped inserts and a removable incisor bar with vertical height compensation (±5 mm), minimizing pressure necrosis while maintaining skull alignment. All materials comply with ISO 10993-5 (cytotoxicity) and ISO 10993-10 (irritation/sensitization) requirements for short-term implant contact. The device supports compliance with institutional animal care and use committee (IACUC) protocols and aligns with AVMA Guidelines for the Euthanasia of Animals when used in terminal surgical preparations. No electronic components are present; therefore, no electromagnetic compatibility (EMC) certification is applicable.

Software & Data Management

As a purely mechanical positioning accessory, the RWD 68084 requires no firmware, drivers, or proprietary software. Coordinate registration is performed manually using calibrated scales and referenced against published stereotaxic coordinate systems (e.g., Künzle atlas for rabbit diencephalon). When used in conjunction with digital imaging platforms (e.g., MRI-guided targeting or post-procedure micro-CT), positional metadata may be logged manually into ELN systems (e.g., LabArchives, Benchling) or exported via CSV from integrated stereotaxic navigation software (e.g., AngleTree, Stereotaxic Navigator Pro). Audit trails for calibration verification are maintained per GLP Annex 11 principles through dated lab notebook entries or PDF-signed calibration logs.

Applications

• Intracerebral microinjection of viral vectors, tracers, or therapeutics into nucleus accumbens, hippocampus, or thalamus
• Chronic electrode array implantation for longitudinal LFP/Spiking recordings in awake, head-fixed preparations
• Cranial window fabrication for two-photon imaging of cortical vasculature or neuronal activity
• Stereotaxic lesion studies using thermocoagulation or excitotoxic agents
• Calvarial bone flap surgery with precise craniotomy planning relative to bregma-lambda suture landmarks
• Combined fMRI and electrophysiology setups requiring stable, non-magnetic head fixation

FAQ

Is the RWD 68084 compatible with non-RWD stereotaxic frames?
Yes—provided the base plate features M6 threaded mounting holes spaced 42 mm apart (center-to-center) and accepts standard 12 mm diameter vertical posts.
Can the adapter be sterilized using autoclave cycles?
Yes. All structural components withstand repeated steam sterilization at 121°C, 15 psi for 20 minutes. Silicone ear bar tips must be removed prior to autoclaving.
Does the 2 mm anesthesia port support both inhalational induction and maintenance?
Yes. The port is rated for continuous flow rates up to 1.5 L/min with <5 cm H₂O backpressure at 20°C, compatible with isoflurane, sevoflurane, and desflurane delivery circuits.
What is the maximum recommended rabbit weight for safe use?
4.5 kg. Exceeding this mass may compromise pitch/yaw lock integrity and increase risk of micrometer slippage during prolonged procedures.
Are replacement ear bars or incisor bars available separately?
Yes. Part numbers RWD-EB-01 (silicone ear bar set) and RWD-IB-02 (adjustable incisor bar) are stocked and shipped globally.