Effect of the ex situ physical and in situ chemical modification of bacterial nanocellulose on mechanical properties in the context of its potential applications in heart valve design.

Bacterial nanocellulose (BNC) is a promising material for heart valve prostheses. However, its low strength properties limit its applicability in cardiovascular surgery. To overcome these limitations, the mechanical properties of BNC can be improved through modifications.

Bacterial cellulose as a promising material for pulmonary valve prostheses: In vivo study in a sheep model.

Objectives: Currently, no consensus exists regarding the most durable prosthesis for pulmonary valve replacement. Bacterial cellulose is a resistant, nonbiodegradable, nonpyrogenic bioimplant with low hemolysis and clotting properties. We hypothesized that bacterial cellulose heart valve prostheses could be an attractive alternative for pulmonary valve replacement.

In Vitro Study of a Stentless Aortic Bioprosthesis Made of Bacterial Cellulose.

Purpose: The paper present findings from an in vitro experimental study of a stentless human aortic bioprosthesis (HAB) made of bacterial cellulose (BC). Three variants of the basic model were designed and tested to identify the valve prosthesis with the best performance parameters. The modified models were made of BC, and the basic model of pericardium.

Iatrogenic aortic arch injury after unsuccessful percutaneous tracheostomy.

Tracheostomy is a procedure that creates a direct opening to the airway through an incision in the anterior wall of the trachea. These days it is usually performed percutaneously as it is generally regarded as a safe procedure. We present the case of an unusual complication of aortic arch injury after percutaneous tracheostomy (PT) performed at an outside hospital.

Liquid biopsy for minimally invasive heart transplant monitoring: a pilot study.

Background: Heart transplantation allows for a long-term management of patients with end-stage heart failure. After the surgery, organ rejection is monitored with endomyocardial biopsy, which is an invasive, but not always informative procedure. Therefore, there is a pressing need for a new, safe, yet reliable, diagnostic method.

Assessment of the usefulness of bacterial cellulose produced by Gluconacetobacter xylinus E as a new biological implant.

Bionanocellulose (BNC) is a clear polymer produced by the bacterium Gluconacetobacter xylinus. In our current study, "Research on the use of bacterial nanocellulose (BNC) in regenerative medicine as a function of the biological implants in cardiac and vascular surgery", we carried out material analysis, biochemical analysis, in vitro tests and in vivo animal model testing. In stage 1 of the project, we carried out physical and biological tests of BNC.

First uses of HAART 300 rings for aortic valve repair in Poland - 4 case studies.

Introduction: Aortic valve reconstructions using geometric annuloplasty rings HAART 300/200 open new era in aortic valve surgery. The HAART technology resizes, reshapes, stabilizes and simplifies aortic valve repair. The HAART aortic repair rings are designed to be implanted directly into aortic annulus (under aortic valve leaflets).

Incidence- and mortality-related risk factors of acute kidney injury requiring hemofiltration treatment in patients undergoing cardiac surgery: a single-center 6-year experience.

Objective: To evaluate the incidence and mortality risk factors of severe acute kidney injury (AKI) requiring hemofiltration treatment after cardiac surgery.

Design: A single-center, retrospective, case-control study.

Setting: A post-cardiac-surgical intensive care unit at a university hospital.

[Side effects of specific immunotherapy in patients with hymenoptera venom allergy].

The aim of this study was to estimate safety of specific immunotherapy to insects' venom. The frequency of side effects was compared in two groups of patients: subjects with hypersensitivity to insects' venom only and patients with allergy to other allergens. In the examined group of 32 patients with Hymenoptera venoms allergy skin prick tests with common aeroallergens were performed in 30 subjects.