Publications by authors named "Andrew Bullen"

Young adults who present to the ED with neck pain following non-penetrating, seemingly trivial trauma to the neck, are at risk of neck artery dissection and subsequent stroke. Sport-related neck injury is the chief cause. Physical examination may often be unremarkable, and although there may be reluctance to expose young patients to radiation, radiological imaging is central to making a diagnosis of arterial wall disruption.

View Article and Find Full Text PDF

Background: Waldenström's macroglobulinaemia is a rarely encountered B-lymphocytic malignancy. Waldenström's macroglobulinaemia-associated paraproteinaemia is linked to an increase in serum viscosity, which results in a hypercoagulable state. Burning bilateral foot pain in a man with alcohol dependence and controlled atrial fibrillation presenting to the emergency department was attributed to peripheral neuropathy, given satisfactory angiographic evidence of bilateral foot arterial blood supply.

View Article and Find Full Text PDF

Background: Proton pump inhibitors (PPIs) are a commonly prescribed medication that recent data has linked to an increased risk of cardiovascular morbidity and all cause morbidity. The current study sought to perform a systematic review to investigate the link between PPIs and morbidity and mortality METHODS: A systematic review was carried out as per the PRISMA guidelines, with information databases including Pubmed, Medline, and the Cochrane Review Database. English-language studies of all types published from January 1990 to October 2016 were considered.

View Article and Find Full Text PDF

With its emphasis on minimally invasive high-speed imaging of intact tissues at depth, video-rate two-photon microscopy has revolutionized cell biology. This is particularly true in immunology, where the orchestration of cell migration, cell-cell interactions and intracellular signalling events in multiple distinct anatomical compartments within secondary lymphoid organs is fundamental for achieving an effective immune response. Until recently, access to this powerful tool has been limited to a handful of laboratories with the necessary skills and resources to either custom-build or purchase a commercial two-photon microscope.

View Article and Find Full Text PDF

Modern imaging approaches are proving important for addressing contemporary issues in the immune system. These approaches are especially useful for characterizing the complex orchestration of immune responses in vivo. Multicolor, two-photon imaging has been proven to be especially enabling for such studies because of its superior tissue penetration, reduced image degradation by light scattering leading to better resolution, and its high image quality deep inside tissues.

View Article and Find Full Text PDF

Microscopic imaging can enhance the drug discovery process by helping to describe how disease processes unfold and how potential therapies might intervene. Recently introduced technologies, and enhancements to existing techniques, are addressing technical issues that have limited the usefulness of microscopic imaging in the past. In particular, these innovations are improving spatial resolution, increasing tissue penetration, overcoming physical access issues and enhancing experimental throughput.

View Article and Find Full Text PDF

Styryl dyes have been among the most widely used probes for mapping membrane potential changes in excitable cells. However, their utility has been somewhat limited because their excitation wavelengths have been restricted to the 450-550 nm range. Longer wavelength probes can minimize interference from endogenous chromophores and, because of decreased light scattering, improve recording from deep within tissue.

View Article and Find Full Text PDF