[Surgical correction of astigmatism using kerato-resection methods]. / Khirurgicheskaia korrektsiia astigmatizma s pomoshch'iu "keratorezektsionnykh" metodik.

The authors analyze the results of surgical correction of hypermetropic and mixed astigmatism, carried out by two methods: clinoid resection of the cornea and clinoid resection of the cornea with tangent autoclinoplasty (i. e. implantation of the resected site to the tangent incision in strongly refracting meridian). Surgical technique has been mastered in experiments with isolated eyes and the mechanism of changes in corneal refraction, resultant from its resection, studied. Experiments with rabbit eyes have shown that after corneal resection cicatrization is over by the third month after surgery. 17 operations with classical clinoid resection and 17 ones with that and tangent clinoid autoclinoplasty were carried out in patients with corneal astigmatism of 2.0 to 6.25 diopters, the follow-up periods being from 6 months to 4 years. The mean reduction of astigmatism after the use of the aforesaid methods has made up 2.47 and 4.8 diopters respectively (according to the data of subjective examination of refraction).

[Our initial experience with the surgical correction of astigmatism by sectorial keratorrhaphy]. / Pervyi opyt khirurgicheskoi korrektsii astigmatizma metodom sektoral'noi keratorafii.

The authors analyze the first experience with surgical correction of corneal astigmatism by sectorial keratorrhaphy (SKR). The operation consists in sewing an intralamellar nylon (9.00) suture perpendicular to poorly refracting meridian of the cornea. The mechanism of alteration of the corneal curvature resultant from SKR is similar to that in the known wedge-shaped resection of the cornea. The technique of surgery has been mastered in experiments with 12 isolated cadaver eyes. Morphologic studies of 16 eyes of 8 rabbits have lead the authors to a conclusion that prolonged presence of monofilament sutures in the corneal stroma induces the minimal changes in the adjacent tissues, these changes not augmenting over the follow-up period. 15 operations were performed in clinic, the follow-up periods were 4 to 14 mos. The data of the subjective examination of the refraction indicate that corneal astigmatism has reduced by 0.5 to 5.5 diopters, by 2.0-4.0 diopters in the majority of cases. The results evidence that SKR may be used as a method of choice for the surgical correction of hypermetropic or mixed astigmatism.

[Hematopoiesis in children with retroperitoneal neurogenic tumors]. / O krovetvorenii u detei s zabriushinnymi neirogennymi opukholiami

Under observation were 140 children with retroperitoneal neurogenic tumors. In 69 of 125 patients with malignant neoplasms metastases were detected. Hemographic and myelographic findings were analysed depending on the degree of malignancy and tumor spread. Anemia usually moderate and normochromatic was observed only in neuroblastomas. This group of patients is also characterized by frequent shifts to the left leucograms and high sedimentation test, contrary to benigh tumors. The investigation of bone marrow allows one to reveal the suppression, and more rarely irritation of various blood stems.