THE ROLE OF MICROTRAUMA IN THE DEVELOPMENT OF BACTERIAL CORNEAL ULCERS

Purpose: To study the role of corneal  microtrauma in the development of complications, leading to bacterial ulcers. Performed clinical assessment, conservative therapy, and surgical  interventions for 236 patients with the  complication  of microtrauma, mainly related to  the  prolonged  presence of foreign bodies  in the  cornea (86.1% they  had  a  metallic  nature). Methods included  ophthalmologic investigations  and  laboratory  procedures, which revealed  the  presence of bacterial corneal  ulcer  in 97 cases (41.1%), recurrent erosion  — 62  cases (26.3%), traumatic keratitis — 25 cases (10.6%) and  deep  cornea’s infiltrate  — 52  cases  (22.0%). The development of complications was  due to the  later  removal  of FB (in some  cases more  than  1 month  after  the  trauma), incomplete removal of foreign bodies,  non-compliance  with aseptic and antiseptic rules  during in the removal of FB’s without follow up of patients. Streptococcus,  staphylococcus, pneumococcus, and  isolated  cases of Pseudomonas aeruginosa and  Escherichia  coli were  mainly diagnosed. Conservative therapy  included specific, pathogenetic, symptomatic and antiallergic medications. Nitric oxide (NO) in the gas stream was used  to accelerate the reparative processes, weakening  of the inflammatory exudation and cellular proliferation.  Surgical interventions  were  performed for  preserving  of eyes,  prophylactic  and  therapeutic purposes in the  form  autoconjunctiveal  plast y, deep  lamellar  and  penetrating keratoplast y  (preserved  and  fresh  corneas) and  amniotic  membrane transplantation. According  to the results of treatment of 236 patients with the corneal  erosion  completed with elimination of inflammatory reaction, restoration of corneal  transparency; 52 patients with corneal  infiltrate -development  of opacities  in the stromal cornea layers;  patients with keratitis –formation of corneal  leucoma  and 52%  — keratoplast y were  performed. In cases of corneal  ulcer process ended  with the formation of a  rough  leucoma  in 30 patients (30.9%), surgical  interventions  with a  partial  improvement of visual function  were  observed  in 62 patients (63.9%), the removal of the eye were  done in 5 patients (5.2%)

A Differentiated Approach to the Complex Treatment of Cornea Ulcers

Ulcerative lesions of the cornea in 17–21 % lead to functional and up to 8 % to anatomical death of the eye depending on the severity. The aim of the work was to develop an algorithm of surgical treatment of patients with corneal ulcers. Comprehensive examination, treatment and outcomes in the dynamics of ulcerative lesions was performed in 126 patients, 86 patients of them received surgical intervention (with the threat of corneal perforation or present) for emergency indications and in 40 cases combined treatment was carried out with the use of a crosslinking (CRL) in corneal ulcer and ulcer a corneal transplant. Surgical intervention included autoconjuctival plasty (AUC), the transplantation of amniotic membrane in combination with blepharorrhaphy (TAM + BR), lamellar keratoplasty (PKP), penetrating keratoplasty (PK), reconstructive keratoplasty (RCP). The most favorable outcomes with relief of inflammation were achieved in RCP and PC. In cases of delayed epithelialization of the cornea and graft (herpesvirus infection and trophic disorders), the most resonant ones were TAM and TAM + BR. CRL treatment was carried out in 3 variants: 1-as the main method of treatment, 2 — CRL in combination with TAM + BR, 3 — CRL + keratoplasty ( 5–7 days after surgery). As a treatment result, epithelialization of ulcerative-destructive process and partial increase in visual acuity were observed in all patients. Based on the results of patient’s treatment the algorithm of complex surgical care was created. It takes into account the etiology, localization, depth and severity of the inflammatory process, the area of ulcerative lesions of the cornea and of the graft, reduced terms of treatment inflammation and rehabilitation period

EXPERIMENTAL STUDIES THERMOELECTRIC SYSTEMS FOR SHORT-TERM STORAGE AND TRANSPORTATION OF BIOLOGICAL MATERIAL

Described a schematic diagram of an experimental stand thermoelectric system for shortterm storage and transportation of biological material. The technique of the pilot study of the thermoelectric system. The results of the pilot study