Lumen Measurement
Lumen Measurement - Related Videos
03:21
Localized Delivery of Bacteria into the Intestinal Lumen of a Zebrafish Larva Using Microinjection
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2025
Source: Li, J. et al. Development of a Larval Zebrafish Infection Model for Clostridioides difficile. J. Vis. Exp. (2020)This video demonstrates the microinjection-based delivery of fluorescently labeled Clostridioides difficile into the intestinal lumen of an anesthetized zebrafish larva. It outlines the steps involved in larval preparation, bacterial injection, and fluorescence microscopy–based confirmation of bacterial localization within the intestine.
02:34
Quantification of Group B Streptococcus Load in the Mouse Vaginal Lumen via Swabbing and Chromogenic Culture
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2026
Source: Patras, K. A. & Doran, K. S. A Murine Model of Group B Streptococcus Vaginal Colonization. J. Vis. Exp. (2016)This video demonstrates the quantification of vaginal Group B Streptococcus (GBS) load in a mouse model using swabbing and chromogenic culture. It outlines the steps involved in sample collection, plating, and colony counting to quantify GBS load in the mouse vaginal lumen.
03:36
Gold Immunostaining of Exosomal Sections: A Technique to Visualize Diagnostic Markers in Exosomal Lumen
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2023
In this video, we demonstrate gold immunostaining of biomarkers localized within the lumen region of ultrathin exosomal sections. This technique enables early diagnosis of diseases by visualization of target molecules within the exosomes secreted by the diseased cells.
03:21
Gut Acidification Monitoring Assay: A Technique to Study the Acidification of the Intestinal Lumen in Drosophila using Bromophenol Blue Dye
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2025
This video demonstrates an assay to monitor gut acidification in Drosophila flies. After the ingestion of food supplemented with a pH indicator dye, the acidification of the intestinal lumen results in a change in the color of the dye. Visual inspection of the digestive tract of the flies to examine the color change provides evidence of acidification.
10:30
The C. elegans Excretory Canal as a Model for Intracellular Lumen Morphogenesis and In Vivo Polarized Membrane Biogenesis in a Single Cell: labeling by GFP-fusions, RNAi Interaction Screen and Imaging
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Cited by 6 •
2017
The C. elegans excretory canal is a unique single-cell model for the visual in vivo analysis of de novo polarized membrane biogenesis. This protocol describes a combination of standard genetic/RNAi and imaging approaches, adaptable for the identification and characterization of molecules directing unicellular tubulogenesis, and apical membrane and lumen biogenesis.
FAQs
Diameter, cross-sectional area, and volume describe different aspects of a tubular structure, so they are not interchangeable findings. A diameter may summarize one dimension, whereas area or volume can characterize a broader region. Choosing the appropriate measure helps clinicians match the assessment to the anatomical abnormality being investigated and the comparison needed.
Reference comparisons provide clinical meaning that an isolated number may lack. Comparing a lumen with expected anatomy can reveal narrowing or enlargement, while comparing it with a prior examination can show whether an abnormal remodeling pattern is progressing, remaining stable, or changing after care. This supports severity assessment and longitudinal evaluation.
Lumen measurement can help identify reduced internal space, excessive enlargement, obstruction, or abnormal remodeling. The measured change may occur in a blood vessel, airway, or gastrointestinal tract, depending on the clinical question. Because the same quantitative approach applies across these structures, the result can support recognition and assessment of several different disease patterns.
Consistent measurement allows clinicians to interpret differences between examinations as possible anatomical change rather than simply a change in the assessment approach. Repeated values can therefore contribute to monitoring disease progression and evaluating responses to interventions. This longitudinal role is especially important when treatment decisions depend on whether a lumen abnormality is worsening or improving.
The process begins by selecting an appropriate source of anatomical information, such as ultrasound, computed tomography, magnetic resonance imaging, or endoscopy, depending on the structure being assessed. The lumen is then quantified using diameter, area, or volume, and the result is compared with expected anatomy or earlier examinations to support interpretation.
Its value is greatest when a clinician must assess the extent of a structural abnormality or track it over time. In vascular disease, airway disease, and intestinal obstruction, measurements can support diagnosis and severity assessment. They also provide quantitative information for treatment planning, follow-up, and judging whether an intervention has produced a meaningful change.
Quantitative findings give clinicians an anatomical basis for deciding how significant a narrowing, enlargement, or obstruction may be before treatment. Subsequent examinations can be compared with the initial assessment to evaluate response to an intervention and monitor progression. In this way, lumen measurement connects imaging or direct visualization with clinical decision-making over time.