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The evaluation of resorbable haemostatic wound dressings in contact with blood in vitro

Szymonowicz M., Kucharska M., Wiśniewska-Wrona M., Dobrzyński M., Kołodziejczyk K., Rybak Z.

Acta of Bioengineering and Biomechanics

2017

Vol. 19, no. 1

151--165

Purpose: For many years research has been conducted on the development of resorbable, polymer, haemostatic materials designed to provide first aid and preliminary protection of injuries. The biological properties in vitro of a dressing in powder form called Hemoguard are expected to provide the ability to instantaneously stem bleeding with safe conditions of use. The aim of the study was to evaluate the haemostatic properties of a model of dressing based on micro- and nanofibrids of the chitosan, sodium/calcium alginate and/or carboxymethylcellulose complex. Dressings were prepared by spray-drying and freeze-drying. Methods: Human whole blood was subjected to timed contact with the haemostatic dressing model. Haemolytic action was determined by assaying the degree of haemolysis and evaluating blood cell morphology. Haemostatic action was determined on the basis of selected parameters of plasmatic clotting systems. Results: Dressings prepared by freeze-drying activated the coagulation system. The haemolytic index, plasma haemoglobin concentration values and blood cell morphological shapes were normal. Dressings prepared by spray-drying significantly activated coagulation. Activation of the coagulation process was evidenced by shorter clotting time of the plasma coagulation system and a longer process of clot formation. The dressing was associated with an increased haemolytic index and higher plasma haemoglobin concentration. The morphological shape of blood cells changed. Conclusions: The model of multi-resorbable wound dressings has haemostatic properties. The materials activate the clotting process more quickly than a single-dressing model. Increased activity was found for dressings prepared by spray-drying.

Biological Dressings Based on Natural Polymers

Kucharska M., Brzoza-Malczewska K., Wiśniewska-Wrona M., Pałys B., Struszczyk M. H., Cichecka M., Wilbik-Hałgas B., Karuga-Kuźniewska E., Paluch D., Rybak Z.

Fibres & Textiles in Eastern Europe

2016

Vol. 24, no. 6 (120)

170--174

The article presents a method for producing a IV generation hemostatic dressing in the form of powder consisted of fibrous, which ensures a high level of security in application. The dressing material was developed on the basis of natural polymers of the polysaccharide group such as chitosan and calcium sodium alginate in the form of micro- and nanofibrids. The dressing structure, utility properties and biocompatibility (cytotoxicity, irritation and sensitization) were studied.

W artykule przedstawiono metodę wytwarzania hemostatycznego opatrunku IV generacji, który gwarantuje wysoki stopień bezpieczeństwa przy aplikacji. Opatrunek posiada formę proszku fibrydowego. Do opracowania materiału opatrunkowego wykorzystane zostały polimery naturalne z grupy polisacharydów takie jak chitozan i alginian sodowo-wapniowy. Opatrunek został poddany badaniom strukturalnym, właściwościom użytkowym oraz ocenie biozgodności (cytotoksyczność, właściwości drażniące i uczulające).

Hemostatic, Resorbable Dressing of Natural Polymers-Hemoguard

Wiśniewska-Wrona M., Kucharska M., Struszczyk M. H., Cichecka M., Wilbik-Hałgas B., Szymonowicz M., Paluch D., Guzińska K., Rybak Z.

Autex Research Journal

2016

Vol. 16, no. 1

29--34

Investigations are presented for the preparation of a model hemostatic dressing that would exhibit an adequate hemostatic capacity in injuries and surgical wounds, an antibacterial activity to prevent primary and secondary infections, and offer safety in use. The Hemoguard dressing has been designed as a powder prepared from the complex chitosan/alginate Na/Ca in the form of micro- and nano-fibrids. Useful antibacterial and hemostatic properties of Hemoguard, which would qualify the material as first aid dressing and a temporary protection of injury wounds in field conditions, were assessed. Biocompatibility of the dressing was confirmed by biological in vitro examinations.