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Biomedical subjects

M Dutescu

Publications and source records attributed to M Dutescu.

10 recordsLinked to original sources
PubMed1983

[Surgical correction of severe astigmatism following keratoplasty].

Corneal astigmatism after keratoplasty can be treated optically or surgically. If a step forms after surgery or after removal of the sutures, resuturing is necessary. In cases of extreme astigmatism which are optically not correctable, surgical methods such as keratotomy, keratocauterization or keratoresection have been suggested. The excision of a corneal wedge, introduced in 1975, is a useful method which has now become established. The technique and the results in 8 cases are presented.

Aged↗
PubMed1979

[Refractometry after treating with atropine and cyclopentolat in childhood (author's transl)].

Using Rodenstock's Refraktometer refractometry was done on 314 hyperopic children (3--14 years) first after treating with Atropine and some weeks later after Cyclopentolat-hydrochlorid. 53,1% of them showed higher hyperopia after Atropine than after Cyclopentolat, the maximum in difference was 1,75 dptr. In another group of children with Cyclopentolat-treating the residual accommodation was determined by four different methods (Refactometer, Apparatus of Schober, Phoropter in a distance of 5,0 and 0,4 mtrs). The results show a minimum of accommodation 45 minutes after application of the drops under special conditions. These conditions are reported as well as a method of correction of hypermetropia due to the values of refractometry or residual accommodation.

Accommodation, Ocular↗
PubMed1978

[The diagnostic efficiency of tonography].

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%).

Glaucoma↗
PubMed1976

[Combined contactoptical system (author's transl)].

The indications and the adaptation method of a combined contactoptical system called piggy-back system, are dealt with. This system comprises the adaptation of a soft contact lens on which is applied afterwards, a hard one. The optical and the therapeutic results obtained in 7 groups of patients (56 eyes) with astigmatism, aphakia, keratokonus, keratoplasty, injuries, chronic lesions of the epithelium, and hyposecretion of the tear fluid, are discussed together with the results of the adaptation of the lenses.

Contact Lenses↗
PubMed1975

Methods of mathematical differentiation in tonography.

Our bulbar-compressure isotonographical 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+10 and Pt=Po+30. Also, the outflow facility (C) was determined by Grant's tonography. Thus, 3 C-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 C-value (Cdiff) by deltaP=O are possible. With normal eyes the average C-values were indirectly proportional to the pressure differences. This relationship was found to be directly proportional on glaucomatous eyes. The tonographical coefficients Po/Co-4, P3/CL3-7, Po-10/Co-4, and Po/Cintegral were calculated on 104 normal and 312 glaucomatous eyes. The results show small differences between the average values of the various coefficients for normal and glaucomatous eyes. The percentage of the pathological values on glaucomatous eyes varies from 57.4% to 67.3%. The diagnostic efficiency of the tonography is increased by the determination of Cdiff (percentage of positive values=70%) and the calculation of Po/Cdiff value (95%).

Glaucoma↗
PubMed1972

[Corneal fragility].

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Biomechanical Phenomena↗