Feasibility of continuous transthoracic cardiac imaging using a novel ultrasound transducer.
Feasibility of continuous transthoracic cardiac imaging using a novel ultrasound transducer.
复制标题
使用新型超声换能器进行连续经胸心脏成像的可行性。
DOI：
10.1046/j.1540-8175.2001.00651.x
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
Chen,Q
中科院分区：
文献类型：
--
作者：
Chandraratna,PA;Vijayasekaran,S;Brar,R;Azer,M;Brar,B;Gandhi,S;Niguse,GT;Chen,Q
背景：以前尚未证实免持经胸连续超声心脏成像的可行性。我们开发了一种安装在外壳中的2.5 MHZ球形换能器，可实现360 °转向（CONTISON）。使用粘合贴片将外部壳体连接到胸壁。方法和结果：将换能器放置在左胸骨边缘的第三或第四间隙中，以允许在其短轴上对左心室（LV）进行成像，并将其连接到胸壁。然后将换能器连接到超声机上。10例正常人和20例既往心肌梗死患者进行了研究。在研究开始时进行以下操作：（1）将患者从仰卧位（0 °）以20 °增量旋转至左侧卧位（90 °）。在0 °、20 °、40 °、60 °、80 °和90 °连续显示超声心动图，并记录在录像带上（胸骨旁短轴视图）。(2)患者恢复仰卧位，并进行超声心动图检查。然后通过使用床上的控制装置，使患者坐起来20 °、40 °、60 °、80 °和90 °。(3)然后患者恢复仰卧位，超声心动图持续显示在监护仪上。每15分钟记录一次超声心动图，持续4小时。在仰卧位和侧向旋转（0 °-90 °）期间，LV的所有节段均可见。因此，体位不影响图像。在坐位（0 °-90 °）期间可视化LV的所有节段，并且在4小时成像期间可视化所有节段。患者能够四处移动而不会使图像失真。结论：CONTISON探头可对左室壁运动进行连续成像。体位不影响室壁运动的解释。该器械在重症监护环境中监测LV功能方面具有潜在适用性。
Background: The feasibility of hands‐free transthoracic continuous ultrasonic cardiac imaging has not been demonstrated previously. We developed a 2.5‐MHZ spherical transducer mounted in an external housing to permit steering in 360° (CONTISON). The external housing was attached to the chest wall using an adhesive patch. Methods and Results: The transducer was placed in the third or fourth interspace at the left sternal border to permit imaging of the left ventricle (LV) in its short axis and attached to the chest wall. The transducer then was attached to an ultrasound machine. Ten normal subjects and 20 patients with previous myocardial infarction were studied. The following maneuvers were performed at the beginning of the study: (1) The patient was rotated from the supine position (0°) in 20° increments to the left lateral decubitus position (90°). The echocardiogram was displayed continuously and was recorded on videotape (parasternal short‐axis view) at 0°, 20°, 40°, 60°, 80°, and 90°. (2) The patient was returned to the supine position and an echocardiogram was obtained. The patient was then seated up 20°, 40°, 60°, 80°, and 90° by using the controls on the bed. (3) The patient then was returned to the supine position and the echocardiogram was displayed continuously on the monitor. The echocardiogram was recorded every 15 minutes for a period of 4 hours. All segments of the LV were visualized in the supine position and during lateral rotation (0°–90°). Thus, body position did not affect the image. All segments of the LV were visualized during sitting up (0°–90°), and all segments were visualized during the 4 hours of imaging. The patients were able to move around without distortion of the image. Conclusion: The CONTISON transducer permitted continuous imaging of LV wall motion. Body position did not affect interpretation of wall motion. This device has potential applicability in monitoring LV function in the intensive care setting.