YUYANBIO Rat Brain Stereotaxic Head Holder for Microscopy

Overview

The YUYANBIO Rat Brain Stereotaxic Head Holder is a precision-engineered mechanical fixation system designed specifically for in vivo neurosurgical procedures and high-resolution microscopic observation in rodent models. It operates on the fundamental principle of stereotaxic immobilization—rigidly constraining the cranium relative to a three-dimensional coordinate frame while preserving physiological stability and minimizing stress-induced artifacts. Engineered for compatibility with upright and inverted microscopes, this head holder ensures sub-millimeter positional repeatability during intracranial injections, cranial window implantation, two-photon imaging, or electrophysiological recordings. Its modular architecture supports seamless integration with gas anesthesia delivery systems (isoflurane/oxygen), enabling stable, continuous sedation throughout extended procedures without compromising head alignment or airway patency.

Key Features

• Multi-material construction: Selectable from corrosion-resistant 316 stainless steel (for autoclave compatibility), lightweight anodized aluminum (for reduced magnetic interference), or radiolucent PEEK polymer components (ideal for longitudinal imaging or MRI environments).
• Adjustable stereotaxic interface: Dual-axis calibrated ear bar depth adjustment (±2 mm resolution) and vertically indexed incisor bar height (0.5 mm increments) accommodate anatomical variation across rat strains (e.g., Sprague-Dawley, Wistar, Long-Evans) and weight ranges (200–500 g).
• Dedicated anesthesia integration: Integrated low-profile isoflurane mask port with flow-regulated inlet and CO₂ scrubber-compatible exhaust routing—designed to maintain normothermia and prevent desiccation during prolonged microscopy sessions.
• Microscope-ready mounting: Standard 12.7 mm or 25.4 mm rail interface compliant with major stereotaxic frame manufacturers (David Kopf Instruments, Stoelting Co., Neurostar GmbH), enabling rapid attachment/detachment without recalibration.
• Injection-optimized geometry: Strategically positioned lateral access ports allow unobstructed 90° needle insertion for intracerebroventricular (ICV), intraparenchymal, or intracisternal injections under visual guidance.

Sample Compatibility & Compliance

The head holder is validated for use with adult rats (200–500 g) and available in parallel configurations for mice (18–35 g). All materials meet ISO 10993-5 (cytotoxicity) and ISO 10993-10 (irritation/sensitization) biocompatibility standards. The MRI-compatible variant complies with ASTM F2503-22 for passive implant safety in 3T and 7T magnetic fields, with measured deflection <0.1 mm under 3T static field exposure. Device design follows GLP-aligned documentation practices—including traceable lot numbering, material certifications (RoHS/REACH), and sterilization validation reports (steam autoclave at 121°C, 15 psi, 20 min).

Software & Data Management

While the head holder itself is a mechanical platform, it is fully interoperable with industry-standard stereotaxic planning software (e.g., Paxinos & Watson digital atlases, Brain Explorer 2, QuickNII) and microscope control suites (ZEN Blue, NIS-Elements, SlideBook). When used with motorized stereotaxic frames, it supports bidirectional communication via TTL/RS-232 for synchronized coordinate logging and audit-trail generation compliant with FDA 21 CFR Part 11 requirements for electronic records in regulated preclinical studies.

Applications

• Intracranial viral vector delivery under fluorescence-guided microscopy
• Cranial window implantation for chronic two-photon calcium imaging
• Real-time confocal imaging of microglial dynamics during LPS-induced neuroinflammation
• Electrophysiological patch-clamp recordings from cortical or hippocampal neurons
• Functional ultrasound (fUS) or laser speckle contrast imaging (LSCI) during sensory stimulation paradigms
• MRI-compatible longitudinal structural/functional scanning in awake or anesthetized subjects

FAQ

Is this head holder compatible with both upright and inverted microscopes?
Yes—the low-profile base plate and adjustable vertical clearance (up to 85 mm from stage surface to skull surface) support objective working distance requirements for water-immersion, silicone-oil, and air objectives across major microscope platforms.
Can I use it for longitudinal experiments requiring repeated imaging sessions?
Absolutely. The MRI-compatible variant enables repeated scanning without device removal; the standard stainless steel version supports up to 200 autoclave cycles with no dimensional drift per ISO 13485 verification testing.
Do you provide strain-specific calibration templates?
Yes—YUYANBIO supplies digitally registered 3D-printed reference jigs for Sprague-Dawley, Wistar, and C57BL/6J mice, aligned to the Franklin & Paxinos atlas coordinate system.
What documentation accompanies each unit for regulatory submissions?
Each shipment includes a Device Master Record (DMR)-aligned certificate of conformance, material traceability report, biocompatibility summary, and sterilization validation data package.