Avaliação de bolsas de sangue de policloreto de vinila submetidas às variações de temperatura.

Abstract

The introduction of plastic bags of polyvinyl chloride (PVC) for collection and storage of blood and blood components was a breakthrough in transfusion process. The use of these bags brought to transfusion services a collection, preparation and transfusion of blood more quick, safe and efficient. The influence of extreme processes in the processing and storage of blood bags, as sterilization temperature of 115 to 120 ° C, blood storage temperature to - 70°C and successive centrifugations of up to 5000rpm, can lead to changes in the material. These changes can cause ruptures of blood bags with the consequence of losing contents causing economic losses, biological risk and negative implications for voluntary donation. This research has the objective the chemical and thermal evaluation of polyvinyl chloride blood bags. The samples from national blood bags used for this research were selected through ANVISA database from regularized blood bags. The PVC blood bags were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Energy-Dispersive X-Ray Spectroscopy (EDS), Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TG). According to the results observed on FTIR, it can be affirmed that all bags had the characteristic functional groups of PVC. The SEM showed a homogeneous surface. The EDS essay detected the characteristic chemical elements of the studied material. The Thermogravimetric Analysis has shown the bags from both manufacturers have similar thermal degradation profile starting around 200°C. The DSC essay confirmed with the TG essay also showing the initial degradation at 200 °C. Based on the data obtained in this work it was identified that the bags conform to the same standard composition, possibly recommended by the European Pharmacopoeia.