Bacterial contamination in solution aspirated from non-sterile packaged fentanyl ampoules: A laboratory study
Department of Anaesthesia and Pain Medicine, King Edward Memorial Hospital, Subiaco, Western Australia, Australia. Anaesthesia and intensive care
(Impact Factor: 1.3).
Iatrogenic meningitis is a rare complication of spinal anaesthesia. It is mandatory to use a technique which minimises the risk of introducing bacteria into the subarachnoid space. Currently available fentanyl ampoules require a careful drawing-up technique, as the outside of the ampoule is not sterile and there is potential to contaminate the contents in the drawing-up process. We designed a pilot laboratory study to determine the extent of bacterial contamination of fentanyl solutions drawn up from non-sterile packaged glass fentanyl ampoules using three different methods: aspirating through a 5 microm filter needle only, aspirating through a 5 microm filter needle after swabbing the neck of the ampoule with isopropyl alcohol and aspirating through an antibacterial filter in addition to the 5 microm filter needle. Ten anaesthetists used each method once, in randomised order to draw up solution from three different fentanyl ampoules. Samples underwent bacterial culture in blood agar and enrichment broth for 48 hours. No significant growth was seen in any sample. This pilot study did not identify any bacterial contamination of fentanyl solution irrespective of which of the three methods for aspiration was used.
Available from: Viswas S. Purohit
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ABSTRACT: Silica and paramagnetic silica microparticles are surface-modified by an antibacterial macromolecular coating. For this, a hydrophilic copolymer brush based on oligo(ethylene glycol) methacrylates is grown on the particle surface by surface-initiated ATRP. Then, Magainin-I, a natural antimicrobial peptide, is grafted onto the hydroxyl groups of the brush through a heterolinker. The grafting of the peptide is evidenced by fluorescence microscopy and X-ray photoelectron spectroscopy. Moreover, culturability and viability assays performed in the presence of the magainin-grafted particles prove their bactericidal properties. The rapid recovery of the bactericidal particles based on paramagnetic silica and suspended in solution is shown under magnetization. Such particles offer the advantage to treat efficiently various sensitive aqueous solutions while avoiding any dissemination of bactericidal substances in the environment. As a consequence, they are of a great interest for various applications in medical, cosmetic, or biomedical fields.
Available from: Nádia Duarte
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