Cannula Diameter Reduction
Cannula Diameter Reduction - Related Videos
04:01
Cannula Implantation into the Cisterna Magna in a Mouse Model
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2025
Source: Xavier, A. L. R., et al. Cannula Implantation into the Cisterna Magna of Rodents. J. Vis. Exp. (2018)This video demonstrates the procedure for implanting a cannula into the cisterna magna of an anesthetized mouse. The technique involves guiding a needle-mounted cannula through the dura into the inverted triangular cisterna magna and securing it for targeted delivery into the cerebrospinal fluid.
03:11
Oxidation-Reduction Reactions
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2020
Oxidation–Reduction Reactions Earth’s atmosphere contains about 20% molecular oxygen, O2, a chemically reactive gas that plays an essential role in the metabolism of aerobic organisms and in many environmental processes that shape the world. The term oxidation was originally used to describe chemical reactions involving O2, but its meaning has evolved to refer to a broad and important reaction class known as oxidation–reduction (redox) reactions. Some redox reactions involve the transfer of...
01:29
Administering Oxygen by Nasal Cannula
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2025
Oxygen therapy is critical to patient care, especially for those struggling with respiratory issues. This intervention increases the oxygen concentration in the lungs, enhancing the amount of oxygen transported to the body's tissues. One standard method of delivering supplemental oxygen is through a nasal cannula, a non-invasive device that provides low to medium oxygen concentrations. Nasal Cannulas A nasal cannula is a lightweight tube split into two prongs placed in the nostrils, connected...
11:37
Propeller Characterization: Variations in Pitch, Diameter, and Blade Number on Performance
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2023
Source: Shreyas Narsipur, Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC A propeller is a twisted airfoil, where the angle of the chord changes with respect to the location, along the radial station, as shown in Figure 1. Propellers are widely used in aircraft and watercraft propulsion systems thereby necessitating detailed characterizations of propellers to design high performance vehicles. Figure 1. Chord, thickness, and pitch at a radial station. One of...
02:24
Tracheal Cannulation in Rabbit Model: A Procedure to Insert Tracheal Cannula into the Rabbit Trachea
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2025
This video demonstrates the surgical creation of an opening in the rabbit trachea to insert a tracheal cannula for artificially ventilating the lungs.
FAQs
A smaller diameter decreases the cannula’s cross-sectional area, which can increase flow resistance and change how fluid moves through the device. At the tissue interface, the reduced size can limit disruption during insertion or implantation. The resulting design must therefore balance gentler access with the intended delivery or sampling performance.
Mechanical strength, clogging risk, flow rate, and the biological response to the device all influence performance. Decreasing the diameter may reduce tissue disruption, but it can also constrain the delivery pathway and affect resistance. Evaluating these factors together helps researchers select a cannula that remains functional for the intended biological experiment.
Using smaller-gauge tubing reduces the diameter along the selected tubing, whereas controlled shaping can create a tapered tip with a changing profile near the insertion end. These approaches may differ in insertion behavior and fluid-path characteristics. The choice depends on whether the priority is a narrower overall pathway, a modified tip, or both.
A researcher can begin by selecting tubing with a smaller gauge or by forming a tapered tip through controlled shaping. The resulting design should then be considered in relation to intended flow, mechanical strength, clogging risk, and tissue response. This evaluation connects the physical modification to the requirements of delivery, sampling, or access.
This approach is useful when an experiment requires fluid delivery, sampling, or instrument access while limiting tissue disruption. Relevant applications include minimally invasive implantation, localized drug administration, microinjection, and physiological sampling. It can support animal research and cellular studies when the reduced pathway still meets the experiment’s mechanical and flow requirements.
A narrower cannula can provide a focused route for localized drug administration or microinjection, while also serving as an access path for physiological sampling. In animal and cellular studies, its value comes from combining targeted access with reduced tissue disruption. Researchers must still match the diameter to required flow, device strength, and biological response.