Jones R D, Adams R B, Luria M H
Med Instrum. 1977 Jul-Aug;11(4):244-9.
A miniature myocardial segment-length strain gauge arch utilizing solid-state strain gauge elements is described. The arch weighs 0.25 g, has a frequency response flat to 30 Hz, requires simple circuitry, and is stable in situ for periods exceeding 6 hours. Its miniaturization and ease of insertion offer distinct advantages over similar devices previously described. Miniature arches have been applied simultaneously to multiple sites to assess left ventricular function in dogs. The response of these arches to a variety of interventions indicates that this device may be used to follow localized segment-length and velocity changes. The study also clearly demonstrates that the orientation of strain gauge arches with respect to muscle fiber direction in the ventricular wall qualitatively and quantitatively affects the recorded segment-length alterations.
本文描述了一种采用固态应变片元件的微型心肌节段长度应变仪弓形装置。该弓形装置重0.25克，频率响应在30赫兹以下呈平坦状态，所需电路简单，在原位可稳定超过6小时。与先前描述的类似装置相比，其小型化和易于插入具有明显优势。微型弓形装置已同时应用于多个部位，以评估犬的左心室功能。这些弓形装置对各种干预措施的反应表明，该装置可用于跟踪局部节段长度和速度变化。该研究还清楚地表明，应变仪弓形装置相对于心室壁肌肉纤维方向的取向在定性和定量上都会影响记录到的节段长度变化。
