Kniestedt C, Kanngiesser H E
Augenklinik, Kantonsspital, Brauerstrasse 15, 8400 , Winterthur, Schweiz.
Ophthalmologe. 2006 Aug;103(8):713-21; quiz 722-3. doi: 10.1007/s00347-006-1387-7.
Dynamic contour tonometry (DCT) is a new technology for noninvasive and direct measurement of intraocular pressure (IOP); its results are thought to be influenced less than those of other methods by structural characteristics of the eye. The curvature of the pressure sensing device is concave and only slightly flatter than that of the human cornea. The cornea adapts to the curvature of the transducer head, and the sensor in the centre of the adapted area measures the pressure on the other side of the cornea in the force-free range. Studies published so far suggest that DCT is less heavily dependent than applanation tonometry on the biomechanical properties of the cornea . A further advantage of DCT over other forms of tonometry is the capability of dynamic measurements over time. It is also possible to measure both the diastolic and the systolic IOD and determine the difference between the two, i.e. the ocular pulse amplitude (OPA). OPA is an indirect indicator of choroidal perfusion and reflects the condition of the arterial vascular system and the action of the heart. It could be important in the diagnosis and treatment of glaucoma.
动态轮廓眼压计（DCT）是一种用于无创直接测量眼压（IOP）的新技术；人们认为其结果受眼部结构特征的影响比其他方法小。压力传感装置的曲率是凹形的，仅比人眼角膜的曲率稍平一些。角膜适应换能器头部的曲率，适应区域中心的传感器在无压力范围内测量角膜另一侧的压力。迄今为止发表的研究表明，与压平眼压计相比，DCT对角膜生物力学特性的依赖性较小。与其他形式的眼压计相比，DCT的另一个优点是能够进行随时间的动态测量。还可以测量舒张期和收缩期眼压，并确定两者之间的差值，即眼脉冲幅度（OPA）。OPA是脉络膜灌注的间接指标，反映动脉血管系统的状况和心脏的活动。它在青光眼的诊断和治疗中可能很重要。
