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相关概念视频

Sensory Functions of the Skin01:16

Sensory Functions of the Skin

The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
There are two main categories of receptors on the skin: capsulated and non-capsulated. The non-capsulated ones are mainly the pain receptors. The capsulated ones can be further categorized based on the...

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A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation
16:40

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由心内导管和皮肤贴片电极产生的三维潜在梯度场.

A S Tang1, P D Wolf, Y Afework

  • 1Department of Medicine, Duke University Medical Center, Durham, N.C.

Circulation
|May 1, 1992
PubMed
概括

在调查除电极配置时,这项研究发现V----A+P设置在整个心脏中产生了最强的电压梯度. 然而,梯度场仍然不均,表明可以改善除功效.

科学领域:

  • 心血管生理学心血管生理学
  • 生物医学工程 生物医学工程
  • 电力生理学 电力生理学

背景情况:

  • 优化除需要电极配置,在整个心脏中创建更大,更均的电压梯度.
  • 这项研究评估了四种非胸腔术电极配置,以评估它们产生有效除冲击梯度的能力.

研究的目的:

  • 为了确定由四个非胸腔术电极配置为除而产生的冲击梯度场的大小.
  • 为了比较不同电极放置在创建心脏电压梯度的有效性.

主要方法:

  • 用了6只狗,在右心室 (V),右心房 (A) 和左侧胸部 (P) 放置电极.
  • 在心房和心房内128个电极的冲击电位被记录在腹痛期间.
  • 计算了四种配置的潜在梯度:V----A,V----P,V----A+P和V+A----P. 这四种配置的潜在梯度为V----A,V----P,V----A+P和V+A----P.

主要成果:

  • 与V----A,V----P或V+A----P相比,V----A+P配置通常在整个心室产生更高的电压梯度.
  • 在V+A----P配置中,测试的配置中,最大电位梯度是最低的.
  • 观察到梯度场在涉及单独导管或与补丁电极相结合的配置中在心室中不均.

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Three-dimensional Imaging of Nociceptive Intraepidermal Nerve Fibers in Human Skin Biopsies
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A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation
16:40

A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation

Published on: February 28, 2012

Three-dimensional Imaging of Nociceptive Intraepidermal Nerve Fibers in Human Skin Biopsies
11:22

Three-dimensional Imaging of Nociceptive Intraepidermal Nerve Fibers in Human Skin Biopsies

Published on: April 29, 2013

An Implantable System For Chronic In Vivo Electromyography
09:52

An Implantable System For Chronic In Vivo Electromyography

Published on: April 21, 2020

结论:

  • 估计三维冲击梯度场是可行的.
  • V----A+P配置产生了最高的梯度,而V+A----P产生了最低的高梯度.
  • 在心室间的梯度场中观察到的不均性表明当前非胸腔切除术配置在实现均除方面存在局限性.