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Assessment of the Cardiovascular System III: Palpation01:27

Assessment of the Cardiovascular System III: Palpation

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Palpation involves feeling the body to evaluate texture, size, consistency, and tenderness for assessing cardiovascular health. The following steps are organized in a head-to-toe order:
Jugular Venous Pressure (JVP) Measurement
Position the patient at a thirty- to forty-five-degree angle or in a semi-fowler's position. Look for the highest point of pulsation in the internal jugular vein and measure the vertical distance to the angle of Loius or sternal angle. A normal JVP is 3-4 cm above...
492
Vascular Spasm01:16

Vascular Spasm

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The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last...
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Arteries of the Upper Limbs01:12

Arteries of the Upper Limbs

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The subclavian artery transitions into the axillary artery as it exits the chest and enters the axillary region. This artery is critical for supplying blood to the shoulder area, including the head of the humerus, through the humeral circumflex arteries. As the vessel continues into the upper arm or brachium, it becomes the brachial artery. This artery plays a key role in vascularizing the brachial region and bifurcates at the elbow into several branches. These branches include the deep...
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Muscles of the Forearm that Move the Hand and Fingers01:17

Muscles of the Forearm that Move the Hand and Fingers

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The muscles of the forearm that move the wrist, hand, and digits are numerous and diverse. They can be classified into two groups based on their location and function — the anterior and posterior compartment muscles.
Anterior Compartment
The anterior compartment muscles originate from the humerus. They primarily function as flexors and are also known as flexor muscles. They typically insert on the carpals, metacarpals, and phalanges. The superficial layer includes the flexor carpi...
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Somatosensation01:33

Somatosensation

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The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
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Veins of Upper Limbs01:17

Veins of Upper Limbs

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The human circulatory system, a marvel of biological engineering, is a complex network of vessels that transport blood throughout the body. Among these, the veins responsible for carrying blood from the upper limbs are divided into two categories: deep and superficial.
The deep venous system is primarily composed of the ulnar and radial veins. The ulnar vein, which drains the fingers through the superficial palmar venous arches, and the radial vein, which serves the palms via the deep palmar...
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Updated: Sep 9, 2025

Non-invasive Assessment of Microvascular and Endothelial Function
05:41

Non-invasive Assessment of Microvascular and Endothelial Function

Published on: January 29, 2013

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人 の 指 の 血管 運動

Pekka Talke, Jonathan S Maltz, Marcus Talke

    Journal of vascular research
    |August 28, 2025
    PubMed
    まとめ
    この要約は機械生成です。

    この研究は,光パレチスモグラフィを用いて人の指先における血管の動き,つまり血管の振動を記録する方法を示しています. 観察された血管運動は神経活動とは無関係で,α - 2 アドレノ受容体の活性化に関連しています.

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    Last Updated: Sep 9, 2025

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    科学分野:

    • 生理学
    • 血管生物学
    • 薬理学について

    背景:

    • 血管の振動は 血流の調節に不可欠です
    • 血管の動きを記録する以前の方法はしばしば他の血管信号によって混乱させられた.
    • 血管運動を隔離し研究する方法を開発することは,血管制御を理解するために不可欠です.

    研究 の 目的:

    • 人間における血管運動を記録する方法を記述し,検証する.
    • 覚醒状態と麻酔状態を含む異なる条件下で血管運動の特徴を調査する.
    • 他の自発的な血管振動と 血管振動を区別するために

    主な方法:

    • 3つの研究で指先の血管運動を記録するために,フォトプレチスモグラフィーが使用されました.
    • 研究1は,デクスメドトミジンを投与した覚醒した被験者に化学的共感解剖を行った.
    • 研究2と3は,目覚めたボランティアと麻酔を受けた患者に分級されたデクスメデトミジン注入を行った.

    主要な成果:

    • 静脈運動の周波数は,0. 020から0. 037Hzまで一貫して記録された.
    • 観察された血管の振動は神経活動とは無関係でした.
    • 血管運動は局所的であり,アルファ2 - アドレノ受容体の活性化に関連していることが判明しました.

    結論:

    • 記述されたフォトプレチスモグラフィー方法は,重要な干渉なしに血管運動を効果的に記録します.
    • 血管運動は,α-2-アドレノ受容体によって調節される血管の固有の特性です.
    • この技術は,臨床および研究環境で血管運動を研究するための信頼できるツールを提供します.