相关实验视频
Updated: Aug 4, 2026

07:03
Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
10.6K
用低功率霍尔源对HoLEP的极简主义方法:一项回顾性研究
1Department of Urology, Medova Hospital, Konya, Turkey. ramazaninan86@gmail.com.
Urology journal
|November 5, 2024
概括
使用30W源的非常低功率荷尔激光前列腺去核 (HoLEP) 是有效和安全的. 这种方法简化了新的外科医生HoLEP,并可能降低发展中国家的成本.
科学领域:
- 泌尿器科 泌尿器科 泌尿器科 泌尿器科
- 最少侵入性的手术
- 激光技术 激光技术 激光技术
背景情况:
- 前列腺的霍尔激光取核 (HoLEP) 是一种针对良性前列腺增生的标准治疗方法.
- 采用HoLEP可能受到高功率激光设备成本的限制.
研究的目的:
- 为了评估使用30W荷激光器的非常低功率HoLEP (VLP-HoLEP) 的有效性和安全性.
- 为了比较低功率 (LP) 和非常低功率 (VLP) HoLEP之间的手术参数.
主要方法:
- 对60名接受HoLEP治疗的患者的回顾性分析,分为LP (n=30) 和VLP (n=30) 组.
- LP组使用了60W激光 (2J,20Hz); VLP组使用了30W激光 (2J,10Hz).
- 手术参数和结果由经验丰富的外科医生进行评估.
主要成果:
- 在不需要增加激光功率的情况下,在所有VLP患者中都成功实现了HoLEP.
- 对于VLP-HoLEP,平均核化时间为67.9分钟,效率为0.99克/分钟.
- 不需要输血,并且在3个月的随访期间没有观察到压力尿失禁.
结论:
- 非常低功率的HoLEP是一种安全有效的治疗选择.
- 对于新手术的外科医生来说,VLP-HoLEP可以缓解学习曲线.
- 由于初始投资较低,这种方法可能会在资源有限的环境中提高HoLEP的可访问性.
更多相关视频
相关概念视频
Nuclear Overhauser Enhancement (NOE)
Irradiation of a spin-active nucleus causes an increase or decrease in the signal intensity of neighboring nuclei that are not necessarily chemically bonded or involved in J-coupling. This phenomenon, called the nuclear Overhauser enhancement (NOE), results from through-space interactions between the nuclear spins. The NOE effect decreases with increasing internuclear distance and is generally not observed beyond 4 angstroms. In NOE, dipole-dipole interactions between neighboring spin-active...
Source Transformation
Source transformation is a fundamental technique employed in circuit analysis, offering a valuable tool for simplifying complex electrical circuits. This technique involves the replacement of either a voltage source in series with a resistor by a current source in parallel with a resistor, or vice versa. The key concept here is that when the original sources are deactivated (turned off), the equivalent resistance at the circuit's end terminals remains the same.
It is essential to note that when...
It is essential to note that when...
Superposition Theorem
The superposition principle is a fundamental concept stating that in a linear circuit, the voltage across (or current through) an element can be determined by summing the individual contributions of each independent source acting in isolation. When dealing with linear circuits containing multiple independent sources, this principle serves as a valuable tool for analysis. To apply the superposition principle effectively, one should focus on a single independent source at a time while...
RL Circuit without Source
When a DC source is suddenly disconnected from an RL (Resistor-Inductor) circuit, the circuit becomes source-free. Assuming the inductor has an initial current denoted as I0, the initial energy stored in the inductor can be determined.
Applying Kirchhoff's voltage law around the loop of the circuit and substituting the voltages across the inductor and resistor yields a first-order differential equation. A logarithmic equation is obtained by rearranging the terms in this equation, integrating...
Applying Kirchhoff's voltage law around the loop of the circuit and substituting the voltages across the inductor and resistor yields a first-order differential equation. A logarithmic equation is obtained by rearranging the terms in this equation, integrating...
The Power Superposition Principle
Consider a circuit with two sinusoidal voltage sources. Each one influences the circuit independently, and the superposition principle helps us understand the combined effect by adding up the responses from each source.
Reducing Line Loss
In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss in...
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss in...

