Colored Dye Injection
Colored Dye Injection - Related Videos
09:04
Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas
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2011
Vascular mapping of monochorionic (MC) twin placentas after birth provides a means for detailed demonstration of vascular connections between the twins’ circulations. Imbalance of these connections is thought to play a pivotal role in the development of complications of MC twinning including twin-to-twin transfusion syndrome.
09:52
Accurate and Simple Evaluation of Vascular Anastomoses in Monochorionic Placenta using Colored Dye
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Cited by 92 •
2011
Twin-to-twin transfusion syndrome and twin anemia polycythemia sequence are two potentially devastating problems in perinatal medicine. Both disorders occur only in monochorionic twins and result from unbalanced blood flow through placental vascular anastomoses. We provide a simple protocol to accurately evaluate the presence of vascular anastomoses using colored dye injection of placental vessels after birth.
06:05
Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection
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Cited by 1 •
2017
Methylene blue dye injection into the renal pelvis facilitates the assessment of urinary tract junction obstruction defects during mouse embryonic urinary tract development. Here, a protocol for methylene blue dye injection into the renal pelvis is described.
11:12
Whole Mount Preparation of the Adult Drosophila Ventral Nerve Cord for Giant Fiber Dye Injection
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Cited by 21 •
2011
An in vivo dissection of the adult Drosophila ventral nerve cord (VNC) is demonstrated. This particular dissection method causes little damage to the VNC allowing the subsequent labeling of the giant fiber neurons with fluorescent dye for high resolution imaging.
03:47
Methylene Blue Dye Injection in Mouse Embryonic Urinary Tract: A Method To Assess the Congenital Obstruction in the Urinary Tract
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2025
In this video, we administer methylene blue dye injection into the urinary tract of a perinatal embryonic mouse to assess congenital anomalies related to urinary tract obstruction.
FAQs
The tracer follows accessible spaces or circulatory routes, while its visible color creates contrast with surrounding tissue. Observers can then compare where color appears, how far it extends, and whether its pattern remains connected across the examined region. This changes an otherwise difficult-to-see pathway into an observable distribution pattern that can be interpreted anatomically.
A continuous pattern may help show connectivity, whereas dye outside an expected route can suggest leakage. An absent or interrupted pattern may be consistent with an obstruction, and the overall spread can show distribution. These findings help investigators assess how spaces or transport pathways relate to one another, rather than merely marking a location.
The target determines which route the tracer can follow and which structures become visually contrasted. In a vessel, cavity, tissue, or biological sample, the resulting color pattern reflects the spaces or pathways accessible in that setting. Recognizing this dependence helps investigators interpret dye distribution in relation to the anatomy being examined.
The method can contribute to both structural and functional interpretation. Color patterns may clarify anatomical relationships, while movement through a route and the resulting distribution may help assess transport behavior. This combination is useful when investigators need to examine not only where structures are located, but also whether an observable pathway pattern has changed.
A typical workflow begins by selecting the tissue, vessel, cavity, or sample of interest and introducing the colored tracer into the relevant accessible space or route. The investigator then observes its visible movement and distribution, looking for patterns of connectivity, leakage, obstruction, or spread. Interpretation depends on relating those patterns to the examined anatomy.
Interpretation is strongest when the visible color is considered alongside the surrounding tissue and the route through which the tracer moved. Investigators can document whether the pattern demonstrates continuity, leakage, interruption, or broader distribution, then relate those findings to connectivity, obstruction, or transport pathways in the examined specimen or anatomy.
Medical researchers and clinicians can apply the approach to anatomical studies, procedural guidance, specimen analysis, and evaluation of transport pathways. Its value depends on the question being examined: it may help clarify anatomy, support interpretation during a procedure, reveal patterns in a biological sample, or assess structural and functional changes in a pathway.