Anatomic-biomechanical substantiation of stabilization of the sacroiliac joint in cases of unstable pelvic injuries with a countersink-compression screw.

Objective: Aim: Study the mechanism of interaction between the 'sacroiliac joint - screw' system and determine the optimal parameters of the stabilizing structure, the strength of the system connection through computer modeling, and anatomical-biomechanical experiment.

Patients And Methods: Materials and Methods: The optimal parameters of the stabilizing structure for the sacroiliac joint were calculated using software package MathCAD. To validate the results of the numerical modeling, corresponding investigations of mechanical characteristics and determination of stiffness of the studied systems were conducted by an upgraded testing stand, TIRAtest-2151.

ANATOMICAL AND BIOMECHANICAL ROLE OF STATIC STABILIZERS OF THE ACROMIOCLAVICULAR JOINT.

Objective: The aim: To determine the anatomical and biomechanical significance of the static stabilizers of the acromioclavicular joint by conducting numerical modeling using the finite element method and experimental investigation.

Patients And Methods: Materials and methods: To ensure the study, modeling of the deformation processes of the clavicle and scapula systems with various combinations of ligament damage was conducted. The COMPAS-3D software package was used to build the simulation model, which allowed obtaining models that are closest to reality.

BIOMECHANICAL STUDY OF MINIMALLY INVASIVE TECHNIQUES IN SURGICAL TREATMENT OF THE TIBIA PROXIMAL EPIMETAPHYSIS FRACTURES.

Objective: The aim: Improving efficiency of the tibia proximal epimetaphysis fractures treatment by introducing minimally invasive techniques using the up-to-date metallic constructions.

Patients And Methods: Materials and methods: The study is based on the results of examination and treatment of 119 patients, using arthroscopic technique. The results were evaluated regarding the P.

OPTIMIZING DISTRACTION OSTEOSYNTHESIS IN PATIENT WITH THE TIBIAL SEGMENT TISSUE LOSS AFTER FRACTURES.

Objective: The aim: Improving treatment outcomes in patients with segment tibial bone tissue loss after fractures by improving the ring fixators technology.

Patients And Methods: Materials and methods: The study includes the data of 77 patients. The patients were distributed between two groups: the main and control one, using random numbers table.

Substantiation and differential approach to operative treatment of patients with psoriatic arthritis.

Objective: The aim: To improve the psoriatic arthritis treatment outcomes by establishing and implementing into practice operative treatment.

Patients And Methods: Materials and methods: The study basis is represented with the results of examination and treatment of 252 patients with psoriatic arthritis. The biopsy samples from the problem psoriatic eruption and intact skins regions, received from 74 patients, were studied.

Three- to six-year results of metacarpophalangeal joints arthroplasty in psoriatic arthritis.

Background: Patients with psoriatic arthritis often need the replacement of the hand joints owing to the high prevalence of hand joints involvement and their often severe destruction and/or function loss. The long-term results of silicone arthroplasty of metacarpophalangeal joints in psoriatic patients are almost unreported in the scientific literature.

Materials And Methods: We analyzed 3- to 6-year results of 14 metacarpophalangeal joint replacements with silicone implants that we performed in nine psoriatic patients.

Endolumenal rectal resection and transanal natural orifice specimen extraction (NOSE) without rectal stump opening: a novel, clean surgical technique in a porcine model.

Minimally invasive surgery has been continuously evolving over the past 20 years. The use of natural orifice specimen extraction (NOSE) is one of the most recent contributions to minimally invasive methods. The anus has been widely used in NOSE procedures.

[Multiple-modality treatment of patients with psoriatic arthritis in the early stages of the disease].

Psoriatic arthritis is encountered in 7 to 44 percent of psoriatic cases. In managing the condition there arise certain difficulties related to our having no clear idea of the genesis of structural-and-functional changes in the locomotor system as well as in the blending of cutaneous and articular lesions. The study is based on the examination and treatment of 63 patients whose age ranged between 25 to 60 years.

[The diagnosis and combined treatment of humeral fractures complicated by involvement of the radial nerve].

Diaphysis fractures of the brachium are frequent and rather severe lesions resulting in losses of working capacity for a long term. Diaphysis fractures in association with lesions of the radial nerve of varying severity equal from 3.2 to 17.

[Percutaneous endopyelotomy].

The paper deals with an endoscopic correction technique for ureteropelvic stricture, namely percutaneous endopyelotomy. The authors employed the technique in 16 patients both with primary and postoperative strictures of a ureteropelvic segment. Endopyelotomy was concomitant with nephrolith extraction in some cases.

[The Whitaker perfusion test in the diagnosis of organic obstruction of the upper urinary tract].

The X-ray and radioisotopic tools currently used in the diagnosis of upper urinary obstruction fail to take into account the dynamics of the ureter and largely depend on preserved renal function. Therefore Whitaker's test was proposed for this, which involves fluid perfusion along the nephrostomic drain and measurement of intrapelvic pressure. The test was employed in 40 patients and confirmed antegrade pyeloureterographic evidence in 32 (80%) patients, but failed in 8 (20%) patients who were suspected for upper urinary obstruction as shown by anterograde pyeloureterographic findings, whereas the perfusion test excluded the obstruction.

[Plasmapheresis in the complex treatment of nonspecific ulcerative colitis].

An experience with using the apparatus plasmacytapheresis in 16 patients with nonspecific ulcer colitis has revealed its high effectiveness mainly in patients with mild and middle-severity forms of the disease. Convincing data were obtained on the improvement of clinical, biochemical and immunological processes. The method can be used in ambulatory conditions for supporting therapy of the patients.

[The use of the polyene-resistant mutation model in Saccharomyces as a test-system for detecting genetically active substances].

The simple test-system has been developed to register mutagenic activity of different chemicals using a model of forward polyene-resistant mutations in Saccharomyces cerevisiae.

[Drainage of the thoracic duct in the complex treatment of progressive forms of multiple sclerosis].

The results of clinical and modern immunological studies (assessment of T- and B-lymphocytes in the blood, cerebrospinal fluid and lymph) promoted the authors to operate (drainage of the thoracic lymphatic duct) on six patients with disseminated sclerosis to try to control their pathologically altered immune homeostasis. A rationale for a new type of pathogenetic therapy of progressive disseminated sclerosis which is tolerant to many therapeutic methods employed previously including immunodepression and immunostimulation is presented.