tailieunhanh - Báo cáo khoa học: " A new resorbable device for ligation of blood vessels - A pilot study"

Tuyển tập các báo cáo nghiên cứu về bệnh học thý y được đăng trên tạp chí Acta Veterinaria Scandinavica cung cấp cho các bạn kiến thức về bệnh thú yđề tài: A new resorbable device for ligation of blood vessels - A pilot study. | Hõglund et al. Acta Veterinaria Scandinavica 2011 53 47 http content 53 1 47 AVS ACTAVETERINARIA SCANDINAVICA RESEARCH Open Access A new resorbable device for ligation of blood vessels - A pilot study 1 1 2 3 4 1 Odd V Hoglund Ragnvi Hagman Kerstin Olsson Jonas Mindemark Niklas Borg and Anne-Sofie Lagerstedt Abstract Background During surgery controlled haemostasis to prevent blood loss is vital for a successful outcome. It can be difficult to ligate vessels located deep in the abdomen. A device that is easy to use and enables secure ligatures could be beneficial. Cable ties made of nylon have been used for ligation but the non-resorbable material caused tissue reactions. The objective of this study was to use a resorbable material to construct a device with a self-locking mechanism and to test its mechanical strength and ligation efficiency. Methods The device was manufactured by injection moulding of polydioxanone a resorbable polymer used for suture materials. Polydioxanone with inherent viscosities of dL g and dL g were tested. The device consisted of a perforated flexible band which could be pulled through a case with a locking mechanism. After a first version of the device had been tested some improvements were made. The locking case was downsized corners were rounded off the band was made thicker and the mould was redesigned to produce longer devices. Tensile tests were performed with the second version. The first version of the device was used to ligate the ovarian pedicle in a euthanized dog and to test echogenicity of the device with ultrasound. Compression of vessels of the ovarian pedicle was examined by histology. Both versions of the device were tested for haemostasis of and tissue grip on renal arteries in six anaesthetised pigs. Results The tensile strength of the flexible band of the devices with inherent viscosity of dL g was N range N n 11 and the devices with inherent viscosity of dL g had