Effects of Different Intra-arterial Catheter Size on the Frequency of Optimal Dynamic Response in Radial Arterial Waveform
试验速览
- 阶段
- 不适用
- 入组人数
- 366
- 试验地点
- 1
- 主要终点
- The frequency of adequately damped arterial waveform
研究概览
简要总结
The aim of this study is to compare the effects of different intra-arterial catheter size on the frequency of optimal dynamic response in radial arterial waveform.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Diagnostic
- 盲法
- Double (Participant, Outcomes Assessor)
入排标准
- 年龄范围
- 20 Years 至 79 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •patients who were scheduled for elective neurosurgery under general anesthesia
- •patients with age of 20-79 and ASA class I-III
- •patients who are needed to establish invasive arterial pressure monitoring
排除标准
- •patients who refuted to be involved in the study
- •patients with age of <20 or >80
- •patients who had both arm saved
- •patients who had a previous history of surgery on radial artery
研究组 & 干预措施
20 gauge
干预措施: different intra-arterial catheter size (Device)
22 gauge
干预措施: different intra-arterial catheter size (Device)
24 gauge
干预措施: different intra-arterial catheter size (Device)
结局指标
主要结局
The frequency of adequately damped arterial waveform
时间窗: 1 minute after cannulation
The accuracy of arterial blood pressure waveform is depedent on damping coefficient (DC) and natural frequency (NF). The extent to which a monitoring system is damped is expressed by the DC, while the frequency of oscillation that a monitoring system resonates at is known as the NF. The NF and DC are required to be within certain rages for accurate blood pressure monitoring, and they can be affected by different arterial catheter size. Adequately damped arterial waveform can be defined as NF and DC being within certain ranges. For example, waveforms with DC of 0.5 at a NF of 15Hz can be regarded as adequately damped arterial waveform. However, if waveforms have DC of 0.1 at a NF of 15Hz, these can be regarded as not having optimal dynamic response. (There is a reference figure explaining these factors in detail in a previous article. Gardner RM: Direct blood pressure measurement--dynamic response requirements. Anesthesiology 1981; 54:227-3)
次要结局
- The difference of mean blood pressure between invasive blood pressure and non-invasive blood pressure(1 minute after cannulation)
研究者
Hee-Pyoung Park
Professor
Seoul National University Hospital