相关实验视频
Updated: Jul 16, 2025

09:36
Measurement of Spatial Stability in Precision Grip
Published on: June 4, 2020
3.2K
准确性,精度以及与压力测量装置有关的观察者间和观察者内部协议
Carolyn L Chen1, Mandy L Wallace1, Rachel A Reed2
1Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA.
Veterinary surgery : VS
|September 14, 2023
概括
带内置仪表 (WMg) 的水力计在经过测试的压力测量设备中表现出卓越的准确性和精度. 所有设备都显示出很好的观察者一致性,这表明了潜在的临床实用性.
科学领域:
- 生物医学工程 生物医学工程
- 医疗器械技术 医疗器械技术
- 临床测量 临床测量
背景情况:
- 精确的压力测量在各种医疗应用中至关重要.
- 评估不同压力测量设备的性能对于临床实践至关重要.
- 现有的设备可能具有不同程度的准确性,精度和设备间一致性.
研究的目的:
- 评估三种压力测量设备的准确性和精度:内置仪表 (WMg) 的水力计,动脉压力传感器 (APT) 和指南针CT (CCT).
- 评估这些设备的观察者间和观察者内部协议.
- 为了比较他们的表现与黄金标准 (水力计与绳子 - WMr).
主要方法:
- 在体外模型研究中,使用水力计,以线条 (WMr) 为黄金标准,进行了体外模型研究.
- 测试了五种预先确定的压力 (4,8,13,17,24厘米H2O).
- 三名调查人员以随机顺序评估了每个设备 (WMg,APT,CCT).
- 布兰德-阿尔特曼图片和类内相关系数 (ICC) 用于协议分析.
主要成果:
- 与WMr相比,WMg显示了最小的平均差异 (-0.020±0.010厘米H2O),表明了高准确度和精度.
- APT和CCT的平均差异较大 (分别为0.390±0.077厘米H2O和-1.267±0.213厘米H2O).
- 观察者间协议 (ICC=1.000) 和观察者内部协议 (ICC=0.985-0.998) 对所有设备都非常出色.
结论:
- WMg是最准确和精确的设备,其次是APT,CCT是最不准确的.
- 所有测试的设备都表现出了卓越的观察者间和观察者内部协议.
- 虽然所有设备都显示出潜在的临床实用性,但由于其卓越的准确性和精度,建议使用WMr或WMg.
相关概念视频
Accuracy and Precision
8.9K
Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value. Highly accurate...
8.9K
Uncertainty in Measurement: Accuracy and Precision
73.9K
Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value.
73.9K
Errors occurring during blood pressure monitoring
763
Blood pressure monitoring is a crucial clinical procedure in diagnosing and managing various cardiovascular conditions. Despite its significance, the accuracy of blood pressure measurements can be compromised by multiple factors, potentially leading to either falsely high or low readings. These inaccuracies are critical as they can significantly impact patient care. So, it is vital to understand these challenges deeply and adopt strategic approaches to minimize errors.
Several factors...
Several factors...
763
Measurement of Fluid Pressure
230
Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
230
Equipments Used To Measure Blood Pressure
1.0K
Direct Method
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
1.0K
Uncertainty in Measurement: Reading Instruments
38.3K
Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process. Such measurements result in exact numbers. By counting the eggs in a carton, for instance, one can determine exactly how many eggs are there in the carton. Similarly, the numbers of defined quantities are also exact. For example, 1 foot is exactly 12 inches, 1 inch is exactly 2.54 centimeters, and 1 gram is exactly 0.001 kilograms. Quantities...
38.3K

