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相关概念视频

Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

789
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...
789
Assessing Blood pressure using a doppler ultrasound01:19

Assessing Blood pressure using a doppler ultrasound

1.2K
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:
1.2K
Pulse rhythm01:30

Pulse rhythm

754
Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
754
Special considerations while measuring blood pressure01:28

Special considerations while measuring blood pressure

701
When assessing blood pressure (BP), healthcare professionals must consider various factors and potential unexpected outcomes to ensure accurate readings and provide proper patient care. Adhering to these guidelines is essential to achieving the most reliable results.
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
701
Special considerations while measuring pulse01:13

Special considerations while measuring pulse

553
Assessing a patient's pulse is a fundamental skill in healthcare, but certain situations require special attention:
553
Doppler Effect - II01:05

Doppler Effect - II

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The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...
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相关实验视频

Updated: May 28, 2025

Remote Magnetic Navigation for Accurate, Real-time Catheter Positioning and Ablation in Cardiac Electrophysiology Procedures
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使用毫米波多普勒雷达进行远程血压估计的精确心脏持续时间检测.

Shengze Wang1, Mondher Bouazizi2, Siyuan Yang2

  • 1Graduate School of Science and Technology, Keio University, Yokohama 223-8522, Japan.

Sensors (Basel, Switzerland)
|February 13, 2025
PubMed
概括
此摘要是机器生成的。

这项研究提出了一种新的雷达模型,通过准确检测心脏活动来无触摸地估计血压. 该系统即使在正常呼吸过程中也能实现精确的测量,为持续健康监测提供了显著的进步.

关键词:
这是一个多普勒雷达雷达.血压 血压 血压 血压心脏运动检测检测心脏运动检测

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Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
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科学领域:

  • 生物医学工程 生物医学工程
  • 信号处理 信号处理
  • 心血管技术的心血管技术

背景情况:

  • 精确的血压 (BP) 监测对于心血管健康管理至关重要.
  • 现有的血压测量方法通常需要身体接触或屏住呼吸,限制了持续监测.
  • 对于血压估计至关重要的微妙心脏运动,由于噪音和呼吸干扰,很难用雷达检测.

研究的目的:

  • 开发一种基于雷达的模型,用于无接触和连续的血压估计.
  • 提高微妙心脏活动的检测,以提高血压监测的准确性.
  • 克服以前基于雷达的方法的局限性,特别是呼吸和噪音的干扰.

主要方法:

  • 实现从短时间里埃转换 (STFT) 获得的集成频谱波形,以捕捉微小的心脏活动.
  • 隐藏的半马尔科夫模型 (HSMM) 和U-net模型用于从集成频谱中提取心脏特征的应用.
  • 专注于来自高频振动的能量变化,有效过呼吸和噪音.

主要成果:

  • 节拍间隔 (87.5%),静脉缩时间 (88.7%) 和腹缩时间 (73.1%) 的根平均平方误差 (RMSE) 显著减少.
  • 在正常呼吸过程中实现了可比的预测准确性,与之前需要屏住呼吸的方法不同.
  • 据报道,腹血压 (3.98±5.81 mmHg) 和静脉血压 (6.52±7.51 mmHg) 的低误差.

结论:

  • 拟议的基于雷达的模型可以实现准确的,无触摸的血压监测.
  • 集成频谱波形和先进的特征提取有效地隔离心脏信号.
  • 这项技术对持续的,非侵入性的心血管健康评估具有前景.