Osteogenic Potential and Long-Term Enzymatic Biodegradation of PHB-based Scaffolds with Composite Magnetic Nanofillers in a Magnetic Field.

Millions of people worldwide suffer from musculoskeletal damage, thus using the largest proportion of rehabilitation services. The limited self-regenerative capacity of bone and cartilage tissues necessitates the development of functional biomaterials. Magnetoactive materials are a promising solution due to clinical safety and deep tissue penetration of magnetic fields (MFs) without attenuation and tissue heating.

[Clinical and economic justification of icg-cholangiography in «difficult» laparoscopic cholecystectomy].

Objective: To prove from a clinical and economic point of view the expediency of using ICG cholangiography in patients with «difficult» laparoscopic cholecystectomy for the prevention of damage to the bile ducts.

Material And Methods: The results of treatment of 173 patients with cholelithiasis at various levels of health care providing were analyzed with regard to assessment of indicators of surgery complexity, developed complications and economic costs.

Results: The effectiveness of the original scale of «difficult» laparoscopic cholecystectomy has been proved.

Adhesion of and to Films and Electrospun Fibrous Scaffolds from Composites of Poly(3-hydroxybutyrate) with Magnetic Nanoparticles in a Low-Frequency Magnetic Field.

The ability of materials to adhere bacteria on their surface is one of the most important aspects of their development and application in bioengineering. In this work, the effect of the properties of films and electrospun scaffolds made of composite materials based on biosynthetic poly(3-hydroxybutyrate) (PHB) with the addition of magnetite nanoparticles (MNP) and their complex with graphene oxide (MNP/GO) on the adhesion of and under the influence of a low-frequency magnetic field and without it was investigated. The physicochemical properties (crystallinity; surface hydrophilicity) of the materials were investigated by X-ray structural analysis, differential scanning calorimetry and "drop deposition" methods, and their surface topography was studied by scanning electron and atomic force microscopy.

[Implementation of the «safe cholecystectomy» program in the Leningrad Region].

Objective: To present a treatment program for patients with cholelithiasis in the region in accordance with modern requirements for the quality of medical care in the realities of a three-level system of surgical care.

Material And Methods: The results of treatment of patients with cholelithiasis at various levels of medical care were analyzed with an assessment of the indicators of operational activity of performing cholecystectomy by laparoscopic and open methods, the development of complications of surgery and inpatient mortality.

Results: A programmatic approach has been developed to assist patients with cholelithiasis in the conditions of regional healthcare at different levels of surgical care.

Comprehensive Study on the Reinforcement of Electrospun PHB Scaffolds with Composite Magnetic FeO-rGO Fillers: Structure, Physico-Mechanical Properties, and Piezoelectric Response.

This is a comprehensive study on the reinforcement of electrospun poly(3-hydroxybutyrate) (PHB) scaffolds with a composite filler of magnetite-reduced graphene oxide (FeO-rGO). The composite filler promoted the increase of average fiber diameters and decrease of the degree of crystallinity of hybrid scaffolds. The decrease in the fiber diameter enhanced the ductility and mechanical strength of scaffolds.