Dutescu M
Fortschr Med. 1978 Mar 23;96(11):593-6.
There are three methods for increasing the diagnostic efficiency of tonography: The improvement of tonographical technique, the combination of tonography with provocative tests and methods of mathematical differentiation. Our own bulbar-compression isotonographical method is described. This method allows a choice of different pressure gradients. Our method was applied to 28 normal and 40 glaucomatous eyes. This method was carried out twice on all patients using two pressure gradients: Pt = Po + 30 and Pt = Po + 10. Also, the outflow facility (L) was determined by Grant's tonography. Thus, 3 L-values were obtained with 3 varying pressure differences (Pt -- Po = deltaP). With this differential tonography the mathematical determination and the graphic representation of a real L-value (Ldiff) by deltaP = 0 are possible. With normal eyes the average L-values were indirectly proportional to the pressure differences. This relationship was found to be directly proportional to glaucomatous eyes. The tonographical coefficients Po/L, P3/L3-7,Po -- 10/L and Po/Lintegral were calculated on 104 normal and 312 glaucomatous eyes. The diagnostic efficiency of tonography is increased by the determination of Ldiff (percentage of positive values = 70%) and the calculation of Po/Ldiff value (95%).
改进眼压描记技术、将眼压描记与激发试验相结合以及数学微分法。本文描述了我们自己的眼球压迫等眼压描记法。该方法允许选择不同的压力梯度。我们的方法应用于28只正常眼和40只青光眼患者的眼睛。所有患者均使用两种压力梯度（Pt = Po + 30和Pt = Po + 10）进行两次该方法检查。此外，流出易度（L）通过格兰特眼压描记法测定。因此，在3种不同的压力差（Pt - Po = ΔP）下获得了3个L值。通过这种微分眼压描记法，可以通过ΔP = 0对实际L值（Ldiff）进行数学测定和图形表示。在正常眼中，平均L值与压力差成反比。而在青光眼眼中，这种关系被发现成正比。在104只正常眼和312只青光眼眼中计算了眼压描记系数Po/L、P3/L3 - 7、Po - 10/L和Po/L积分。通过测定Ldiff（阳性值百分比 = 70%）和计算Po/Ldiff值（95%）提高了眼压描记的诊断效率。
