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Related Concept Videos

Assessment of radial pulse01:11

Assessment of radial pulse

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Assessment of Radial Pulse
The radial pulse, located at the wrist, is often the preferred site for assessing peripheral pulse because of its accessibility and dependability. The process of determining the radial pulse involves several steps:
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Assessment of blood pressure in brachial artery(one-step method)01:15

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This procedural guide systematically measures blood pressure using an oscillometric digital sphygmomanometer, emphasizing accuracy, patient safety, and comfort.
Prepare for the Procedure:
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Assessment of blood pressure in brachial artery(two-step method)01:23

Assessment of blood pressure in brachial artery(two-step method)

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Measuring blood pressure is a fundamental skill in healthcare that aids in diagnosing and monitoring hypertension and other cardiovascular conditions. An aneroid sphygmomanometer, commonly used in clinical settings, offers a manual and precise method for blood pressure measurement. The technique for using this instrument involves specific steps that must be carefully executed to ensure accuracy. The following detailed description outlines a two-step technique for assessing blood pressure using...
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Assessment of apical radial pulse01:25

Assessment of apical radial pulse

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Apical-Radial (A-R) Pulse Assessment
The A-R pulse assessment involves simultaneous evaluation of the apical and radial pulses. When the apical and radial pulse rates vary, this assessment helps identify a pulse deficit.
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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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Updated: Dec 26, 2025

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Wrist Vascular Biometric Recognition Using a Portable Contactless System.

Raul Garcia-Martin1, Raul Sanchez-Reillo1

  • 1University Group for ID Technologies (GUTI), University Carlos III of Madrid (UC3M), Av. de la Universidad 30, 28911 Leganés, Madrid, Spain.

Sensors (Basel, Switzerland)
|March 12, 2020
PubMed
Summary

Wrist vein biometrics offer a secure and usable alternative to hand and finger vein recognition. This study introduces a novel contactless system achieving a low Equal Error Rate (EER) of 0.08%, demonstrating real-time processing viability.

Keywords:
Oriented FAST and Rotated BRIEF (ORB)Scale-Invariant Feature Transform (SIFT®)Speeded Up Robust Features (SURF®)contactless datasetidentificationinfrared cameranon-contact devicespattern recognitionvascular biometric recognitionwrist vein recognition

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A Methodological Approach to Non-invasive Assessments of Vascular Function and Morphology
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Area of Science:

  • Biometrics
  • Computer Vision
  • Security Systems

Background:

  • Vascular biometrics, including hand palm and finger vein patterns, are widely used for identification.
  • Human wrist vein recognition is an underutilized biometric modality with comparable usability and safety.
  • Wrist veins offer clearer visualization due to wider patterns, enhancing biometric distinctiveness.

Purpose of the Study:

  • To design, implement, and test a novel non-contact wrist vein biometric recognition system.
  • To create and utilize a new contactless near-infrared vein image database (UC3M-CV1).
  • To evaluate the system's performance against existing contact-based wrist vein databases.

Main Methods:

  • Development of a novel contactless near-infrared imaging system for wrist vein capture.
  • Collection of the UC3M-CV1 contactless database (1200 images, 100 users, uncontrolled lighting).
  • Implementation of the PIS-CVBR® software algorithm for vein recognition, utilizing the TGS-CVBR® image acquisition software.

Main Results:

  • The developed contactless system achieved a best Equal Error Rate (EER) of 0.08% when compared with PUT and UC3M contact databases.
  • The system demonstrated real-time processing capabilities.
  • Performance was evaluated under uncontrolled environmental lighting conditions.

Conclusions:

  • The novel non-contact wrist vein recognition system is viable for real-time applications.
  • Wrist vein biometrics present a promising, underutilized modality for secure identification.
  • The UC3M-CV1 database and PIS-CVBR® algorithm contribute to advancing contactless vascular biometrics.