Related Experiment Video
Updated: Feb 16, 2026
07:03
Imaging and Quantification of the Hepatic Vasculature of Mice Using Ultrafast Doppler Ultrasound
Published on: July 19, 2024
1.8K
Tissue vibration pulsatility for arterial bleeding detection using Doppler ultrasound
Zhiyong Xie1, Eung-Hun Kim, Yongmin Kim
1Department of Bioengineering, University of Washington, Seattle, WA 98195, USA.
Summary
Tissue vibration pulsatility can detect arterial bleeding. This new method, the tissue vibration pulsatility index (TVPI), shows significantly higher readings in injured vessels, aiding in bleeding detection and localization.
Area of Science:
- Biomedical Engineering
- Trauma Research
- Medical Diagnostics
Background:
- Trauma is a leading cause of death in the US, with arterial bleeding a significant contributor.
- Current methods for detecting internal arterial bleeding can be invasive or lack precision.
Purpose of the Study:
- To evaluate the feasibility of using tissue vibration pulsatility for detecting arterial bleeding.
- To assess the potential of this technique for localizing bleeding sites.
Main Methods:
- In vitro experiments using a pulsatile flow phantom with silicone vessels and an 18-gauge needle.
- In vivo experiments involving transcutaneous puncture of juvenile pig femoral arteries with catheters.
- Derivation of tissue vibration pulsatility as a ratio of spectral energy in systole over diastole, defining the tissue vibration pulsatility index (TVPI).
Main Results:
- The TVPI was significantly higher (p<0.005) in injured vessels compared to intact vessels in both in vitro and in vivo models.
- A 2D map of tissue vibration pulsatility allowed for spatial localization of puncture sites in vitro.
Conclusions:
- Tissue vibration pulsatility shows promise as a non-invasive method for detecting arterial bleeding.
- The TVPI may be a valuable tool for identifying and localizing arterial injuries in trauma patients.
Related Concept Videos
01:19Assessing Blood pressure using a doppler ultrasound
2.6K
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:
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
2.6K
00:56Doppler Effect - I
6.5K
The Doppler effect and Doppler shift were named after the Austrian physicist and mathematician Christian Johann Doppler in 1842, who conducted experiments with both moving sources and moving observers. Consider an observer standing on a street corner, observing an ambulance with a siren sound passing by at a constant speed. The observer experiences two characteristic changes in the sound of the siren. Initially, the sound increases in loudness as the ambulance approaches and decreases in...
6.5K
01:05Doppler Effect - II
4.8K
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...
4.8K
01:22Bleeding in Fresh Concrete
625
Bleeding in fresh concrete occurs when water from the mix rises to the surface. This happens because the mix's solid components fail to retain all the water as they settle, leading to separation where water collects at the top. The severity of bleeding can be measured by assessing the total settlement or by noting the decrease in height per unit height of concrete.
Bleeding can cause several issues in the concrete structure. Sometimes, the rising water gets trapped beneath large aggregate...
Bleeding can cause several issues in the concrete structure. Sometimes, the rising water gets trapped beneath large aggregate...
625
01:19Vibrating Concrete
413
Mechanical vibrators are instrumental in compacting newly poured concrete within formwork and around reinforcements. This process is essential to eliminate trapped air pockets and establish a dense concrete mass. One widely used method is vibrating by internal vibrators, often referred to as a poker vibrator or immersion vibrator. It is rapidly inserted through the full depth of the freshly laid concrete and slightly extends into the layer below it (which remains in a plastic state). Consistent...
413
01:24IR Spectroscopy: Molecular Vibration Overview
4.9K
When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
4.9K