通过MRI检测到的手术吸头中的流
Gunnar Hanekop1, Jost M Kollmeier2, Jens Frahm2
1Department of Anesthesiology, Intensive Care, Emergency Medicine, Pain Therapy, University Medicine, Georg-August-University, Robert-Koch-Strasse 40, 37075 Goettingen, Germany.
The journal of extra-corporeal technology
|June 28, 2023
概括
与标准模型相比,修改后的心脏切除吸头显著降低了流. 这项MRI研究表明,几何设计在心脏手术期间影响血液流动和潜在的血液溶解,改善了血液保存策略.
科学领域:
- 生物医学工程 生物医学工程
- 流体动力学 流体动力学
- 心血管外科心血管外科
背景情况:
- 在心脏手术中流失的血液需要输血,与更高的风险有关.
- 血液节约计划倡导重新输血流血.
- 手术吸血可以引起血液溶解,原因是流动诱导的流.
研究的目的:
- 评估磁共振成像 (MRI) 用于检测心脏切割吸头中的流.
- 为了比较不同吸头几何形状的流量性能和流产生.
主要方法:
- 利用速度补偿的T1加权3DMRI进行流检测.
- 在标准化流量条件下 (0-1250毫升/分钟) 测试了四种心脏切除吸头模型.
主要成果:
- 标准模型A在所有流速下都表现出显著的流.
- 经过修改的1号和3号模型仅在较高的流速下显示流;2号模型显示最小的流.
结论:
- 吸头的几何形状是吸血过程中流发生的关键因素.
- 修改设计中的流减少与血溶解潜力较低相关.
- 核磁共振是分析流体动力学和优化手术设备以尽量减少血液损伤的宝贵工具.
相关概念视频
01:24Magnetic Resonance Imaging
5.3K
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
5.3K
01:21Imaging Studies for Cardiovascular System IV: CMRI
65
Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
65
01:14Imaging Studies I: CT and MRI
297
Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
297
01:30Radiological Investigation II: MRI and Ventilation Perfusion Scan
156
Description
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...
156
01:27Imaging Studies IV: Magnetic Resonance Imaging
36
Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
36