Related Experiment Video

Updated: Aug 13, 2026

Dual-mode Imaging of Cutaneous Tissue Oxygenation and Vascular Function
11:35

Dual-mode Imaging of Cutaneous Tissue Oxygenation and Vascular Function

Published on: December 8, 2010

Digital artery blood flow and digital pad opacity during vasoconstriction

D L Davis

    Blood Vessels
    |January 1, 1976
    PubMed
    Summary

    Digital artery blood flow correlates with digital pad opacity pulse amplitudes in dogs. This relationship is driven by precapillary vasoconstrictor responses, indicating opacity pulses reflect blood flow changes.

    More Related Videos

    Non-invasive Assessment of Microvascular and Endothelial Function05:41

    Non-invasive Assessment of Microvascular and Endothelial Function

    Published on: January 29, 2013

    Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research08:42

    Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research

    Published on: October 22, 2014

    Related Concept Videos

    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
    Korotkoff Sounds01:12

    Korotkoff Sounds

    Korotkoff sounds are the specific sounds heard while measuring blood pressure using a sphygmomanometer, typically with a stethoscope or a Doppler device. They are named after Russian physician Nikolai Korotkov, who first described them in 1905. These sounds correspond to turbulent blood flow in the artery as the blood pressure cuff is gradually released after inflation.
    During blood pressure assessment, inflating the cuff 30 millimeters of mercury above the patient's systolic blood pressure...
    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:
    Pulse01:16

    Pulse

    When the heart pumps blood out, arterial elastic fibers play a crucial role in sustaining a high-pressure gradient. They expand to accommodate the received blood and then recoil - a process known as the pulse that can be either manually palpated or electronically quantified. Despite a reduction in its effect with increased distance from the heart, elements of the pulse's systolic and diastolic components persist, observable even at the arteriole level.
    The pulse serves as a clinical indicator...
    Autoregulation of Blood Flow01:17

    Autoregulation of Blood Flow

    Autoregulation mechanisms are characterized by their inherent capacity for self-regulation without necessitating specific nervous stimulation or endocrine control. These mechanisms facilitate the adjustment of blood flow and, therefore, perfusion specific to each tissue region. This self-regulation encompasses chemical signals and myogenic controls.
    Chemical Signaling in Autoregulation
    Chemical signaling operates at the precapillary sphincter level, inciting either contraction or relaxation.
    Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation01:21

    Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation

    Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...