RWD 68081 Canine/Primate/Porcine Adapter for Stereotactic Instruments

Overview

The RWD 68081 Canine/Primate/Porcine Adapter is a precision-engineered mechanical interface designed for integration with RWD and compatible stereotactic frames used in large-animal neuroscience research. It enables secure, reproducible head fixation of medium-to-large-sized laboratory animals—including dogs (up to ~10 kg), non-human primates (e.g., cynomolgus or rhesus macaques), and domestic pigs—during intracranial procedures such as electrode implantation, microinjection, optogenetic fiber placement, or chronic cranial window surgery. Unlike standard rodent adapters, the 68081 features an extended maxillary plate and reinforced dual-screw clamping mechanism, which accommodates broader craniofacial morphology and higher anatomical inertia. Its design adheres to biomechanical principles of load distribution and rotational stability, minimizing unintended head movement during micromanipulator-driven interventions. The adapter does not incorporate active components or sensors; it functions purely as a passive, reusable mechanical coupling system compliant with ISO 13485-aligned manufacturing controls.

Key Features

• Extended maxillary fixation plate engineered for enhanced anterior-posterior reach and improved contact area with the hard palate of larger species
• Dual-threaded stainless-steel locking screws (M4 × 12 mm) providing adjustable clamping force without tissue compression or dental damage
• Modular dovetail interface compatible with RWD STS-1 and STS-2 stereotactic frame rails (standard 12 mm rail pitch)
• Corrosion-resistant anodized aluminum alloy construction (6061-T6) ensuring long-term dimensional stability under repeated autoclaving (up to 134°C, 30 min, Class B cycle)
• Zero-degree angular alignment reference surface machined to ±0.1° tolerance for consistent bregma-lambda plane registration across sessions
• Integrated indexing notches for repeatable lateral positioning relative to the stereotactic zero point

Sample Compatibility & Compliance

The 68081 adapter supports subjects within the approximate weight range of 7–12 kg, including beagle dogs, juvenile macaques (Macaca fascicularis), and miniature Yucatan or Göttingen pigs. It is validated for use under institutional animal care and use committee (IACUC)-approved surgical protocols requiring stable head immobilization for durations exceeding 4 hours. While not a medical device per FDA 21 CFR Part 820, the adapter is manufactured under documented quality management systems aligned with ISO 9001:2015 and supports GLP-compliant experimental workflows when used in conjunction with traceable calibration logs and operator training records. It meets mechanical safety requirements outlined in ISO 14155:2020 (clinical investigation of medical devices in animals) for non-invasive fixation hardware.

Software & Data Management

As a hardware-only mechanical component, the RWD 68081 adapter does not interface with digital control software or generate telemetry data. However, its geometric compatibility ensures seamless integration with stereotactic planning platforms such as Stereotaxic Atlas Viewer (SAV), Paxinos-based coordinate mapping tools, and third-party MATLAB or Python-based targeting pipelines. When used with RWD’s STS-2 Control Software (v3.2+), users can store and recall predefined adapter-specific coordinate offsets to maintain consistency across multi-subject studies. All mechanical dimensions and mounting tolerances are documented in the accompanying Technical Datasheet (Rev. D, 2024), supporting audit readiness for regulatory submissions requiring hardware traceability.

Applications

• Chronic electrophysiological recording in canine models of epilepsy or cardiac autonomic regulation
• Stereotactic delivery of AAV vectors into prefrontal cortex or nucleus accumbens of non-human primates for behavioral circuit mapping
• Implantation of wireless neural dust sensors or cortical ECoG arrays in porcine gyrencephalic brain models
• Validation of MRI-guided targeting accuracy using fiducial marker registration prior to craniotomy
• Longitudinal behavioral pharmacology studies requiring repeated intracerebroventricular (ICV) infusions over 4–6 weeks
• Training platform for veterinary neurosurgical residents in translational stereotactic technique

FAQ

Is the 68081 adapter compatible with non-RWD stereotactic frames?

Yes—provided the host frame uses a standardized 12 mm pitch dovetail rail system and supports interchangeable base plates with ≥20 mm vertical clearance beneath the ear bar mount.
Can this adapter be sterilized using ethylene oxide (EtO)?

No. EtO is not recommended due to potential residue retention in threaded interfaces; steam autoclaving (134°C, 30 min) or hydrogen peroxide plasma sterilization are validated alternatives.
Does the adapter include ear bars or incisor plates?

No. Ear bars (e.g., RWD 68070 series) and adjustable incisor plates (e.g., RWD 68075) must be ordered separately and calibrated for species-specific anatomy.
What is the maximum torque specification for the clamping screws?

Maximum recommended tightening torque is 0.8 N·m; exceeding this may deform the maxillary plate or compromise screw thread integrity.
Is there a version available for ovine or bovine subjects?

Not currently. RWD offers custom OEM development for large-ruminant adapters upon request, subject to minimum order quantity and engineering feasibility review.