Flow Probes
Flow Probes - Related Videos
02:22
Positioning Laser Doppler Probe: A Technique to Implant Probe Over Middle Cerebral Artery for Blood Flow Measurement in Murine Model
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2025
This video describes the surgical procedure to immobilize the laser Doppler probe over the murine brain's middle cerebral artery, or MCA. The probe helps to measure the blood flow in the brain's microvasculature by measuring the Doppler shift caused due to the motion of red blood cells within the artery.
10:16
Molecular Probe Optimization to Determine Cell Mortality in a Photosynthetic Organism (Microcystis aeruginosa) Using Flow Cytometry
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Cited by 2 •
2016
Microbial populations contain substantial cell heterogeneity, which can dictate overall behavior. Molecular probe analysis through flow cytometry can determine physiological states of cells, however its application varies between species. This study provides a protocol to accurately determine cell mortality within a cyanobacterium population, without underestimating or recording false positive results.
02:58
Laser Doppler Needle Probe Insertion: A Technique for Real-time Quantification of Blood Flow within the Spinal Cord in a Porcine Model
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2025
This video demonstrates the placement of a laser Doppler needle probe in the spinal cord of a porcine model. This helps in the continuous quantification of blood supply to the spinal cord, an important assessment in spinal cord injury.
03:29
Flow Cytometry Assay to Quantify Oxidative Stress: An Assay to Quantify Reactive Oxygen Species in Intestinal Organoids Using Fluorogenic Probes
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2025
This video demonstrates a flow cytometry assay to quantify the ROS levels in 3D intestinal organoids obtained from GFP-expressing transgenic mice. This method provides an in vitro experimental model to investigate the efficacy of test compounds on ROS production.
07:28
Measurement of Bioelectric Current with a Vibrating Probe
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Cited by 15 •
2011
The manufacture, calibration and use of non-invasive vibrating probes to measure bioelectric current in various biological systems is described.
FAQs
Doppler-based flow probes analyze frequency shifts produced when ultrasound encounters moving blood cells. The measured shift reflects the movement of blood and can be converted into quantitative flow information. This mechanism is particularly useful when clinicians or researchers need real-time hemodynamic data to assess circulation and relate blood movement to cardiovascular function.
Transit-time flow sensing compares how long acoustic signals take to travel with the direction of fluid movement and against it. The difference between those travel times provides a basis for calculating flow. Unlike Doppler measurement, which relies on frequency shifts from moving blood cells, this approach uses directional differences in acoustic signal travel.
A probe’s measurement approach determines whether flow is assessed through Doppler frequency shifts or acoustic transit-time differences. Its design also relates to whether it is used with blood vessels or clinical equipment. These factors influence the type of quantitative information available and whether the device is suited to monitoring tissue perfusion, cardiovascular function, or fluid movement in a clinical setting.
Flow probes provide quantitative, real-time information about circulation that can support assessment of tissue perfusion and cardiovascular function. By showing how fluid moves through vessels, they help clinicians and researchers evaluate hemodynamic conditions rather than relying only on indirect indicators. The resulting measurements can contribute to diagnosis, treatment decisions, and experimental investigations of circulation.
During vascular graft evaluation, flow measurements can show how fluid moves through the graft and its associated vessels. This information helps clinicians and researchers assess the graft within the broader context of circulation and hemodynamics. Because the readings are quantitative and available in real time, they can support procedural assessment, treatment decisions, and experimental studies.
Flow probes are useful when a surgical procedure requires immediate information about blood movement or tissue perfusion. Their real-time measurements give clinicians hemodynamic data that can help assess circulation during the procedure and inform decisions about the intervention. They are also valuable in research settings where investigators need to observe circulatory changes while studying surgical or vascular processes.