Pre-clearing Step
Pre-clearing Step - Related Videos
01:16
Tracheostomy Care I: Pre-procedural Steps
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2025
A tracheostomy is a surgical technique that involves making an incision in the neck to provide access to the trachea. It is frequently used in medical conditions such as airway obstruction and prolonged mechanical ventilation. Effective nursing management is crucial for the long-term success of a tracheostomy. Required Equipment The equipment necessary for tracheostomy care includes: Disposable and sterile gloves Goggles and mask or face shield Additional PPE, as indicated Sterile normal...
01:26
Tracheostomy Suctioning I: Pre-Procedural Steps
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2025
Tracheostomy suctioning is a critical procedure healthcare professionals perform to maintain a patent airway in patients with a tracheostomy tube. This procedure is necessary when secretions accumulate in the airway, causing respiratory distress. Here is a step-wise procedural guide for performing tracheostomy suctioning using an open system. Equipment Required First, gather all necessary equipment: a sterile suction catheter, a sterile disposable container, sterile gloves, a towel or...
01:19
Handwashing II: Pre-procedure and Initial Procedure Steps
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2023
The pre-procedure steps of handwashing include removing jewelry and rolling up sleeves. However, many organizations allow staff to wear wedding rings. The hand washing procedure itself includes the following steps. First, cover cuts, if any, on hands with a waterproof dressing. Cuts and abrasions can become contaminated with bacteria hindering the ability to clean the area thoroughly. In addition, repeated hand washing can worsen an injury. The nails must be short and clean, without nail paint...
07:49
Imaging Cleared Intact Biological Systems at a Cellular Level by 3DISCO
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Cited by 60 •
2014
To obtain high-resolution images of fluorescently labeled cells within large tissues, ideally, the biological samples should be imaged without sectioning. 3DISCO is a straightforward tissue clearing procedure based on sequential incubation with organic solvents. Upon clearing, the organs become transparent allowing an end-to-end laser scan of the specimen.
10:03
Multiphoton Microscopy of Cleared Mouse Brain Expressing YFP
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Cited by 11 •
2012
Multiphoton microscopy of whole mouse organs is possible by optically clearing the organ before imaging, but not all protocols preserve the fluorescent signal of fluorescent proteins. Using an optical clearing method with ethanol-based dehydration and benzyl alcohol:benzyl benzoate clearing, we show high-resolution multiphoton images of whole mouse brain expressing YFP.
FAQs
The treatment targets pigments, lipids, and other light-scattering material that can interfere with light transmission through a specimen. Reducing these components improves optical conditions for later imaging without requiring the main clearing procedure to address all sources of opacity at once. This is especially important when researchers need to examine structures distributed through the tissue rather than only its surface.
Successful preparation depends on balancing optical improvement with preservation of the specimen’s structural features. If the tissue organization is not maintained, increased transparency would provide limited biological value because cellular distributions and spatial relationships could become difficult to interpret. Preserving structure allows later three-dimensional microscopy to reflect the original organization more reliably.
Pre-clearing prepares the specimen by reducing selected sources of opacity before the primary clearing stage begins. The main procedure can then operate on a sample with improved optical suitability, supporting deeper light penetration and more uniform labeling. This division of preparation and clearing helps produce clearer three-dimensional imaging than relying on the later stage alone.
Chemical conditions and treatment handling should remain controlled so that unwanted light-scattering material is reduced while tissue structure remains preserved. The specimen should be evaluated as a preparation for the next clearing stage, with attention to whether optical clarity improves without compromising organization. Consistent handling is relevant when comparing specimens or interpreting labeling across a study.
A useful outcome is improved optical clarity before the main clearing procedure, reflected in better light penetration and more uniform labeling during subsequent imaging. Researchers can also consider whether structural features remain intact and whether the specimen supports clearer three-dimensional visualization. These outcomes connect the preparatory treatment to the quality and interpretability of later microscopy.
The approach is relevant to investigations of tissue organization, cellular distributions, developmental patterns, and disease-related structural changes. In these settings, improved preparation can make spatial relationships easier to examine throughout a specimen rather than restricting interpretation to limited optical depths. Its value is greatest when three-dimensional microscopy is needed to relate structure across the tissue.