Pressure Fixation Procedure
Pressure Fixation Procedure - Related Videos
04:19
Pressure Fixation of Isolated Murine Pulmonary Valve: A Procedure to Isolate and Chemically Fix the Mouse Pulmonary Valve in Closed Conformation
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2025
In this video, we describe the procedure to isolate and chemically fix the mouse pulmonary value in closed conformation via perfusion pressurization.
05:48
Lung Fixation under Constant Pressure for Evaluation of Emphysema in Mice
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Cited by 4 •
2019
Presented here is a useful protocol for lung fixation that creates a stable condition for histological evaluate of lung specimens from a mouse model of emphysema. The main advantage of this model is that it can fix many lungs with the same constant pressure without lung collapse or deflation.
08:53
Whole Animal Perfusion Fixation for Rodents
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Cited by 531 •
2012
Here we describe a low-cost, rapid, controlled and uniform fixation procedure using 4% paraformaldehyde perfused via the vascular system: through the heart of the rat to obtain the best possible preservation of the brain.
07:26
Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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Cited by 5 •
2013
The laser heated diamond anvil cell combined with synchrotron micro-diffraction techniques allows researchers to explore the nature and properties of new phases of matter at extreme pressure and temperature (PT) conditions. Heterogeneous samples can be characterized in situ under high pressure by 2D mapping and combined powder, single-crystal and multigrain diffraction approaches.
09:38
Procedure for Decellularization of Rat Livers in an Oscillating-pressure Perfusion Device
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Cited by 18 •
2015
The presented techniques for liver harvesting, cannulation and perfusion using our proprietary device enable sophisticated perfusion set-ups to improve decellularization and recellularization experiments in rat livers.
FAQs
Pressure supports more rapid penetration and distribution of the chemical fixative throughout the sample. This reduces the time during which cellular components remain unfixed and vulnerable to preparation-related distortion. More even fixation can therefore help preserve delicate cellular architecture and the spatial relationships between subcellular structures for subsequent microscopic examination.
The pressure must remain within conditions that support fixative movement without mechanically damaging the specimen. Excessive or poorly controlled pressure can compromise the very structures the procedure is intended to preserve. Careful control is therefore central to maintaining structural stability and obtaining images that more faithfully represent cellular or tissue organization.
By rapidly immobilizing cellular components, the method can help retain delicate architecture and relationships between neighboring subcellular structures. This is important when interpretation depends on where structures are located relative to one another, rather than on their presence alone. Improved preservation supports analysis of morphology, tissue organization, and changes associated with disease.
Its main advantage is reducing the delay between specimen preparation and effective chemical fixation. Faster penetration and distribution limit the period in which cells and tissues may undergo preparation-related distortion. As a result, pressure fixation can provide a more stable structural record for microscopy, particularly when delicate architecture or fine subcellular relationships are important.
The procedure requires a biological sample, a chemical fixative, and equipment capable of applying and regulating pressure. Pressure must be controlled while the fixative penetrates and distributes through the specimen. The central procedural objective is to improve fixation speed and uniformity without introducing mechanical damage that could alter the structures being examined.
Researchers may select this approach when preserving cellular or tissue architecture is important for light or electron microscopy. It is relevant to cell biology, histology, and ultrastructural research, where preparation artifacts can affect interpretation. The resulting specimens can support comparisons of morphology, tissue organization, and disease-related structural changes.