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相关概念视频

Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

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Direct Method
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
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Assessing Blood pressure using a doppler ultrasound01:19

Assessing Blood pressure using a doppler ultrasound

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To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
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Pressure Gauges01:20

Pressure Gauges

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Most pressure gauges, like those on scuba tanks, are calibrated to read zero at atmospheric pressure. Readings from such gauges are called the gauge pressure, which is the pressure relative to atmospheric pressure. When the pressure inside the tank exceeds atmospheric pressure, the gauge reports a positive value. Some gauges are designed to measure negative pressure. For example, many physics experiments must take place in a vacuum chamber, a rigid chamber from which some of the air is pumped...
5.4K
Intensity and Pressure of Sound Waves01:05

Intensity and Pressure of Sound Waves

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The intensity of sound waves can be related to displacement and pressure amplitudes by using their wave expressions and the definition of intensity. The critical step to achieve this is to write the power delivered by the particles on the wave as the product of force and velocity and simplify the force per unit area as the pressure. The velocity of the medium's particles can be derived from the displacement.
Unlike the time average of a sinusoidal term, which is zero since it is positive...
1.9K
Measurement of Blood Pressure01:17

Measurement of Blood Pressure

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Assessing blood pressure is a standard procedure executed in virtually all medical environments. The method utilized today was established over a hundred years ago by an innovative Russian doctor, Dr. Nikolai Korotkoff. The soft ticking noise, known as Korotkoff sounds, heard while taking blood pressure readings results from turbulent blood flow within the vessels. The apparatus required for this procedure includes a sphygmomanometer, a blood pressure cuff attached to a gauge, and a...
4.0K
Measurement of Fluid Pressure01:16

Measurement of Fluid Pressure

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Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
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Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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以钻石为基础的HBAR作为高压传感器.

B P Sorokin1, N O Asafiev1, D A Ovsyannikov2

  • 1Technological Institute for Superhard and Novel Carbon Materials, 108840 Moscow, Troitsk, Russian Federation; Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russian Federation.

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概括

一个与钻石芯 (DAC) 集成的新型高超音量批量声学共振器 (HBAR) 作为敏感的高压传感器. 这种声电子传感器表现出卓越的性能和灵敏度,用于高达30 GPa的压力测量.

关键词:
- 斯堪迪化的化.钻石天细胞高压传感器是一种高压传感器.微波高超音量批量声学共振器 微波高超音量批量声学共振器

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High-Sensitivity Nuclear Magnetic Resonance at Giga-Pascal Pressures: A New Tool for Probing Electronic and Chemical Properties of Condensed Matter under Extreme Conditions
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相关实验视频

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科学领域:

  • 材料科学 材料科学 材料科学
  • 凝聚物质物理学 凝聚物质物理学
  • 声学 声学 在声学方面

背景情况:

  • 高压研究需要准确而敏感的测量工具.
  • 现有的压力传感器在性能和灵敏度方面存在局限性.
  • 高超音量批量声学共振器 (HBAR) 为新型传感应用提供了潜力.

研究的目的:

  • 开发和评估使用HBAR作为高压传感器的集成测量系统.
  • 为了研究在钻石细胞 (DAC) 中使用特定的HBAR配置的可行性.
  • 使用已确定的高压校准方法校准HBAR传感器.

主要方法:

  • 开发一个集成系统,结合DAC和HBAR,在微波频段 (1.33.7 GHz) 运行.
  • 一个特定的HBAR配置的制造:"Al/ASN/Mo/100) 钻石".
  • 使用两个独立的方法对HBAR传感器进行校准:钻石拉曼线移和红宝石R1发光线移.

主要成果:

  • 在HBAR频率变化和施加压力 (030 GPa) 之间建立了稳定的相关性.
  • 确定HBAR传感器的灵敏度为4.8 × 10−4 GPa−1.
  • 与05GPa范围内的现有方法相比,开发的传感器表现出卓越的性能和灵敏度.

结论:

  • 集成的HBAR-DAC系统是一个可行的和有效的高压传感器.
  • 拟议的HBAR配置具有高灵敏度和稳定的性能.
  • 这种声电子传感器为高压测量提供了显著的优势,特别是在较低的GPa范围内.