False aneurysm of the interosseous artery and anterior interosseous syndrome - an unusual complication of penetrating injury of the forearm: a case report

<p>Abstract</p> <p>Background</p> <p>Palsies involving the anterior interosseous nerve (AIN) comprise less than 1% of all upper extremity nerve palsies.</p> <p>Objectives</p> <p>This case highlights the potential vascular and neurological hazards of minimal penetrating injury of the proximal forearm and emphasizes the phenomenon of delayed presentation of vascular injuries following seemingly obscure penetrating wounds.</p> <p>Case Report</p> <p>We report a case of a 22-year-old male admitted for a minimal penetrating trauma of the proximal forearm that, some days later, developed an anterior interosseous syndrome. A Duplex study performed immediately after the trauma was normal. Further radiologic investigations i.e. a computer-tomographic-angiography (CTA) revealed a false aneurysm of the proximal portion of the interosseous artery (IA). Endovascular management was proposed but a spontaneous rupture dictated surgical revision with simple excision. Complete neurological recovery was documented at 4 months postoperatively.</p> <p>Conclusions/Summary</p> <p>After every penetrating injury of the proximal forearm we propose routinely a detailed neurological and vascular status and a CTA if Duplex evaluation is negative.</p

Chitosan film containing fucoidan as a wound dressing for dermal burn healing: Preparation and in vitro/in vivo evaluation

The aim of this study was to develop chitosan film containing fucoidan and to investigate its suitability for the treatment of dermal burns on rabbits. Porous films, thickness between 29.7 and 269.0 μm, were obtained by the solvent dropping method. Water vapor permeability (3.3–16.6/0.1 g), the swelling (0.67–1.77 g/g), tensile strength (7.1–45.8 N), and bioadhesion (0.076–1.771 mJ/cm2) of the films were determined. The thinnest films were obtained with the lowest chitosan concentration (P<.05). The water absorption capacity of the films sharply increased with the freeze-drying technique. The film having the thickness of 29.7 μm showed the highest amount of moisture permeability (16.6 g/0.1 g). Higher chitosan concentration significantly increased tensile strength of the films (P<.05). Using higher concentration of lactic acid made films more elastic and applicable, and these films were selected for in vivo studies. Seven adult male New Zealand white rabbits were used for the evaluation of the films on superficial dermal burns. Biopsy samples were taken at 7, 14, and 21 days after wounding, and each wound site was examined macroscopically and histopathologically. After 7 days treatment, fibroplasia and scar were observed on wounds treated with fucoidan-chitosan film. The best regenerated dermal papillary formation, best reepithelization, and the fastest closure of wounds were found in the fucoidan-chitosan film treatment group after 14 days compared with other treatment and control groups. It can be concluded that fucoidan-chitosan films might be a potential treatment system for dermal burns and that changing formulation variables can modulate the characterizations of the films

Experimental full-thickness burns induced by CO2 laser

Many studies have been conducted on the treatment of burns because they are important in morbidity and mortality. These studies are mainly focused on improving care and quality of life of patients. The aim of this study is the induction of standardized full-thickness burns of the skin of rats using the CO2 laser. The results show that non-contact technique using the CO2 laser is effective to induce such standardization of burning and is an important step in determining the efficiency of different therapies used in treating burns.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Camilo Castelo Branco Univ UNICASTELO, Biomed Engn Inst IEB, Sao Paulo, BrazilSao Jose dos Campos Dent Sch UNESP, Biosci Ctr Special Hlth Care CEBAPE, Sao Paulo, BrazilSao Jose dos Campos Dent Sch UNESP, Histol Lab, Sao Paulo, BrazilSao Jose dos Campos Dent Sch UNESP, Biosci Ctr Special Hlth Care CEBAPE, Sao Paulo, BrazilSao Jose dos Campos Dent Sch UNESP, Histol Lab, Sao Paulo, BrazilFAPESP: 09/53509-2FAPESP: 11/50468-