Iontophoresis Cxl Protocol
Iontophoresis Cxl Protocol - Related Videos
07:29
Three Different Protocols of Corneal Collagen Crosslinking in Keratoconus: Conventional, Accelerated and Iontophoresis
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Cited by 30 •
2015
Corneal collagen cross-linking (CXL) is the only conservative treatment currently available to halt keratoconus progression by improving the biomechanical rigidity of the corneal stroma. The aim of this manuscript is to highlight the methods of three different protocols of CXL: conventional CXL (C-CXL), accelerated CXL (A-CXL), and iontophoresis CXL (I-CXL).
07:08
Fast Micro-iontophoresis of Glutamate and GABA: A Useful Tool to Investigate Synaptic Integration
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Cited by 8 •
2013
In this article we introduce fast micro-iontophoresis of neurotransmitters as a technique to investigate integration of postsynaptic signals with high spatial and temporal precision.
03:01
Characterizing Extracellular Space in a Brain Slice Using Ion-Selective and Iontophoresis Microelectrodes
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2025
This video demonstrates how to characterize the extracellular space in a brain slice by using ion-selective and iontophoresis microelectrodes to measure and compare electrical signals. This process helps determine the space's volume fraction and degree of twisting.
04:19
Visualizing Astrocyte Morphology Using Fluorescent Dye Iontophoresis in a Fixed Mouse Brain Slice
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2025
Source: Moye, S. L., et.al. Visualizing Astrocyte Morphology Using Lucifer Yellow Iontophoresis. J. Vis. Exp. (2019). This video demonstrates the use of fluorescent dye iontophoresis to study astrocyte morphology in fixed brain slices. It details the piercing of the astrocyte soma with an electrode to deliver an anionic, hydrophilic dye into the cytoplasm under a low-voltage current, enabling the dye to diffuse and label the soma and branches. Confocal microscopy is then used to visualize the...
10:45
Real-time Iontophoresis with Tetramethylammonium to Quantify Volume Fraction and Tortuosity of Brain Extracellular Space
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Cited by 29 •
2017
This protocol describes real-time iontophoresis, a method that measures physical parameters of the extracellular space (ECS) of living brains. The diffusion of an inert molecule released into the ECS is used to calculate the ECS volume fraction and tortuosity. It is ideal for studying acute reversible changes to brain ECS.
FAQs
The electrical current serves as a delivery aid rather than the cross-linking stimulus itself. It drives charged riboflavin molecules through the corneal epithelium, helping place the photosensitizer within the cornea before ultraviolet-A exposure. This separation of roles matters because riboflavin must be present before light activation can promote collagen cross-links in the stromal tissue.
Riboflavin and ultraviolet-A perform complementary functions in this protocol. Riboflavin absorbs the ultraviolet-A light and acts as the photosensitizer, while the resulting light-activated process promotes collagen cross-link formation in the stroma. The sequence therefore links delivery, light absorption, and tissue strengthening, rather than treating electrical exposure as the source of the cross-links.
Protocol parameters are central because they can alter how much riboflavin penetrates the cornea and how the treatment performs. They also bear on safety and clinical outcomes. For that reason, the electrical-delivery conditions and ultraviolet-A treatment conditions should be considered as an integrated protocol, since changes in either stage may affect the final strengthening response.
The workflow first uses low-current iontophoresis to enhance riboflavin delivery through the corneal epithelium. After riboflavin has been delivered, ultraviolet-A exposure activates the photosensitizer and promotes collagen cross-linking in the stroma. This sequence makes delivery precede irradiation and connects each procedural stage to its intended biological role.
The approach is being studied and applied for corneal ectatic conditions, including keratoconus and ectasia after refractive surgery. Its epithelium-on orientation may be desirable in selected situations, making it relevant when clinicians are evaluating ways to strengthen weakened corneal tissue while preserving that procedural feature.
Assessment should extend beyond whether riboflavin reaches the cornea. The protocol parameters can influence penetration, treatment effectiveness, safety, and clinical outcomes, so these dimensions need to be considered together. In medicine, that broader view helps distinguish adequate photosensitizer delivery from the overall success and safety of corneal strengthening.