Transducer Fixation
Transducer Fixation - Related Videos
03:26
Fixation of Ultrasound Transducers for Spinal Cord Neuromodulation in Mice
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2025
This protocol describes an ultrasound transducer fixation system specifically designed for ultrasound stimulation of the spinal cord in awake mice. The method employs a fixation system to ensure accurate positioning of the ultrasound transducer while simultaneously allowing the experimental subjects to move freely without compromising the precision of stimulation.
08:12
Pressure Transducer: Calibration Using a Pitot-static Tube
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2023
Source: Shreyas Narsipur, Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC Fluid pressure is an important flow characteristic that is required to determine the aerodynamics of a system. One of the oldest and still existing pressure measurement systems is the manometer due to its accuracy and simplicity of operation. The manometer is generally a U-shaped glass tube that is partially filled with liquid, as shown in Figure 1. The U-tube manometer requires no...
03:43
Processing of Lentivirus-Transduced Mouse Intestinal Organoids for Immunohistochemical Analysis
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2026
Source: Van Lidth de Jeude, J. F., et al. A Protocol for Lentiviral Transduction and Downstream Analysis of Intestinal Organoids. J. Vis. Exp. (2015).This video demonstrates the processing of lentivirus-transduced mouse intestinal organoids for paraffin embedding, to enable their downstream analysis for assessing gene expression.
08:53
Whole Animal Perfusion Fixation for Rodents
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Cited by 531 •
2012
Here we describe a low-cost, rapid, controlled and uniform fixation procedure using 4% paraformaldehyde perfused via the vascular system: through the heart of the rat to obtain the best possible preservation of the brain.
01:03
Fixation and Sectioning
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2023
Two basic types of preparation are used to visualize specimens with a light microscope: wet mounts and fixed specimens. The simplest type of preparation is the wet mount, in which the specimen is placed in a drop of liquid on the slide. A liquid specimen can be directly deposited on the slide using a dropper. Solid specimens, such as skin scraping, can be placed on the slide before adding a drop of liquid to prepare the wet mount. Sometimes the liquid is simply water, but stains are often added...
FAQs
Stable fixation keeps the transducer in a consistent position relative to tissue or the experimental apparatus. This preserves the intended coupling, so changes in pressure, movement, force, or electrical activity are converted into signals under comparable conditions. The resulting measurements are easier to interpret because signal changes are less likely to reflect unintended repositioning.
Uncontrolled movement can alter the sensor’s position or its contact with tissue or an apparatus. That change may modify the measured signal even when the biological or mechanical event has not changed. By reducing motion-related artifacts and signal variability, fixation helps distinguish genuine responses from changes caused by unstable measurement conditions.
Fixation is relevant whenever the experiment tracks pressure, movement, force, or electrical activity through a transducer. These variables may arise during neural monitoring, physiological measurement, or behavior-linked mechanical events. Consistent stabilization helps preserve the relationship between the changing variable and the recorded output across the observation period.
Coupling describes how consistently the transducer remains connected to the tissue or experimental apparatus being monitored. Stabilization should maintain that relationship throughout the recording rather than merely holding the device in place at the beginning. Consistent coupling supports comparable signal generation over time and reduces uncertainty when researchers interpret changes in the measured response.
A general workflow is to place the transducer at the intended tissue or apparatus location, secure it so its position remains stable, and verify that coupling is maintained during measurement. Researchers then monitor the relevant signal over time and assess whether the recorded changes remain interpretable. This approach supports reproducible comparisons between recording sessions or experimental conditions.
The approach is useful when experiments monitor neural function, physiological responses, or mechanical events linked to behavior. It becomes particularly important for measurements collected over time or compared across animals, preparations, or recording sessions. Stable placement improves measurement accuracy and reproducibility, helping researchers determine whether differences reflect experimental conditions rather than inconsistent sensor positioning.