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Related Concept Videos

Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

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...
Blood Flow01:29

Blood Flow

Blood is pumped by the heart into the aorta, the largest artery in the body, and then into increasingly smaller arteries, arterioles, and capillaries. The velocity of blood flow decreases with increased cross-sectional blood vessel area. As blood returns to the heart through venules and veins, its velocity increases. The movement of blood is encouraged by smooth muscle in the vessel walls, the movement of skeletal muscle surrounding the vessels, and one-way valves that prevent backflow.
Sites for measuring blood pressure01:21

Sites for measuring blood pressure

Blood pressure measurement is a fundamental clinical procedure, providing crucial data for assessing cardiovascular health. Among the various sites for this measurement, the brachial and popliteal arteries are predominantly utilized due to their accessibility and the reliability of their readings. This lesson delves into the anatomical significance, methodology, and considerations of measuring blood pressure at these locations.
The Brachial Artery: Primary Site for Blood Pressure Measurement
Measurement of Blood Pressure01:17

Measurement of Blood Pressure

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 stethoscope.
Assessing Blood pressure using a doppler ultrasound01:19

Assessing Blood pressure using a doppler ultrasound

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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A Novel Approach to Overcome Movement Artifact When Using a Laser Speckle Contrast Imaging System for Alternating Speeds of Blood Microcirculation
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Blood flow measurement algorithms to detect bleeding source noninvasively.

Keiichiro Ito1, Tomofumi Asayama, Shigeki Sugano

  • 1Department of Creative Science and Engineering, School of Modern Mechanical Engineering, Waseda University, 17 Kikui-cho, Shinjuku-ku, Tokyo 162-0044, Japan. itokei-1985@sugano.mech.waseda.ac.jp

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|January 19, 2012
PubMed
Summary

This study introduces ultrasound visual servoing algorithms to control robotic probes for detecting bleeding sources. These algorithms address challenges in ultrasound imaging, like large artery pulsation and out-of-plane motion.

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Area of Science:

  • Robotics
  • Medical Imaging
  • Biomedical Engineering

Background:

  • Accurate detection of bleeding sources is crucial for medical diagnosis.
  • Ultrasound (US) imaging is a non-invasive modality for visualizing blood flow.
  • Controlling robotic probes for US imaging presents challenges due to large arterial pulsation and out-of-plane motion.

Purpose of the Study:

  • To propose and validate ultrasound visual servoing algorithms for controlling a robotic system with an US probe.
  • To address measurement errors in US imaging caused by arterial dynamics.
  • To develop a robotic system for bleeding source detection using US blood flow measurements.

Main Methods:

  • Development of novel ultrasound visual servoing algorithms.
  • Implementation of a robotic manipulator equipped with an US probe (BASIS-1).
  • Conducting preliminary experiments using a phantom with an artery model.

Main Results:

  • The proposed algorithms effectively control the robotic US probe.
  • Demonstrated ability to manage large pulsation and out-of-plane displacements.
  • First experimental validation of the developed US visual servoing techniques.

Conclusions:

  • The developed ultrasound visual servoing algorithms show promise for robotic control in medical imaging.
  • This work represents a significant step towards robotic systems for non-invasive bleeding source detection.
  • Further research is needed to address remaining measurement errors in clinical applications.