Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Decreasing Function01:27

Decreasing Function

273
A decreasing function describes a relationship where the output consistently declines as the input increases. This means that for any two input values, if one is greater than the other, the corresponding output is smaller. Mathematically, a function f is decreasing on an interval I if for every x1 < x2​ in I, f (x1) > f (x2). This type of behavior is visually identified on a graph that slopes downward from left to right.The nature of a function can be analyzed by calculating...
273
Doppler Effect - I00:56

Doppler Effect - I

6.4K
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...
6.4K
Doppler Effect - II01:05

Doppler Effect - II

4.7K
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...
4.7K
Decreased Body Temperature01:29

Decreased Body Temperature

1.1K
A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by...
1.1K
Decreased pulse rate01:14

Decreased pulse rate

900
Bradycardia is a medical condition in which the heart rate is slower than normal. It occurs when the heart's natural pacemaker, the sinus node, generates slower electrical impulses than the standard rhythm. In adults, bradycardia is diagnosed when the pulse rate falls below 60 beats per minute, indicating a deviation from the normal heart rate range.
There are specific risk factors that can elevate the likelihood of developing bradycardia. Advanced age is a significant factor, with...
900
Glaucoma: Overview01:25

Glaucoma: Overview

1.4K
Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
1.4K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Cataract surgery in eyes with nanophthalmos: Operative technique and refractive outcomes - A case series.

Journal francais d'ophtalmologie·2026
Same author

[Trabecular surgeries in the management of glaucoma: A review of literature].

Journal francais d'ophtalmologie·2026
Same author

Hemorrhagic serous choroidal detachment following micropulse transscleral cyclophotocoagulation in refractory glaucoma.

Journal francais d'ophtalmologie·2026
Same author

Real-life outcomes of the PAUL® Glaucoma Implant with ripcord in refractory glaucoma.

Journal francais d'ophtalmologie·2026
Same author

Secondary angle-closure by pupillary block in a pseudophakic vitrectomized patient.

Journal francais d'ophtalmologie·2025
Same author

[Reversal of optic disc cupping in juvenile glaucoma after filtering surgery].

Journal francais d'ophtalmologie·2025

相关实验视频

Updated: Jan 30, 2026

Doppler Optical Coherence Tomography of Retinal Circulation
10:46

Doppler Optical Coherence Tomography of Retinal Circulation

Published on: September 18, 2012

19.2K

视神经头部的活体多普勒全息在青光眼中:对急性IOP降低的反应.

R Lecoge1, P Bastelica2, M Atlan3

  • 1Department of Ophthalmology, Ambroise-Paré Hospital, AP-HP, Boulogne-Billancourt, France; Université Versailles Saint-Quentin en Yvelines, Versailles, France.

Journal francais d'ophtalmologie
|January 28, 2026
PubMed
概括

在初级开角青光眼 (POAG) 患者中降低眼内压力 (IOP) 显著改善了视网膜中枢动脉 (CRA) 的舒张血流. 多普勒全息学准确地测量了CRA血流中的这些变化.

关键词:
视网膜的中央动脉.血液的流速 血液的流速视网膜中枢动脉 视网膜中枢动脉多普勒全息图是多普勒的全息图.一个开放角度的原始眼镜.全息图多普勒对照技术主要的开放角度眼镜.血液流动的速度

更多相关视频

Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents
10:10

Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents

Published on: February 15, 2022

1.9K
In Vivo Methods to Assess Retinal Ganglion Cell and Optic Nerve Function and Structure in Large Animals
12:18

In Vivo Methods to Assess Retinal Ganglion Cell and Optic Nerve Function and Structure in Large Animals

Published on: February 26, 2022

10.4K

相关实验视频

Last Updated: Jan 30, 2026

Doppler Optical Coherence Tomography of Retinal Circulation
10:46

Doppler Optical Coherence Tomography of Retinal Circulation

Published on: September 18, 2012

19.2K
Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents
10:10

Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents

Published on: February 15, 2022

1.9K
In Vivo Methods to Assess Retinal Ganglion Cell and Optic Nerve Function and Structure in Large Animals
12:18

In Vivo Methods to Assess Retinal Ganglion Cell and Optic Nerve Function and Structure in Large Animals

Published on: February 26, 2022

10.4K

科学领域:

  • 眼科医生 眼科 眼科
  • 医疗成像医学成像
  • 心血管研究研究心血管研究

背景情况:

  • 多普勒全息提供了视网膜血流的非侵入性成像.
  • 主要开角青光眼 (POAG) 是不可逆转失明的主要原因.
  • 了解眼内压力 (IOP) 对视神经头部血流的影响对于POAG管理至关重要.

研究的目的:

  • 为了研究降低眼内压力 (IOP) 对视网膜中枢动脉 (CRA) 血流的影响.
  • 评估多普勒全息在测量这些血液动力学变化的实用性.
  • 评估POAG患者内血压降低和血流参数之间的关系.

主要方法:

  • 招募了四名患有POAG和高内压的患者.
  • 用多普勒全息来测量CRA血流速度在手术IOP降低前后.
  • 计算的关键参数包括峰值缩速度 (PSV),终端透缩速度 (EDV),电阻率指数 (RI) 和速度曲线下的面积 (AUC).

主要成果:

  • 手术后实现了23mmHg的中位压力下降.
  • 观察到腹筋CRA流量的显著改善 (EDV增加,P=0.029) 和RI (减少,P=0.029).
  • 缩流量 (PSV) 和速度曲线下的面积 (AUC) 没有显著变化.

结论:

  • 在POAG患者中,通过手术降低内血压,可以改善CRA的透静血流.
  • 多普勒全息是一种精确的工具,用于量化CRA血流动力学.
  • 这些发现凸显了IOP控制在保持眼球血 perfusion 在玻璃眼睛瘤的重要性.