Using portable ultrasound as a first-line imaging study in kids with suspected appendicitis helps reduce emergency room length of stay and reduces the need for CT scans, according to a team of Mount Sinai researchers. Bedside ultrasound, often referred to as point-of-care ultrasonography, has a specificity of about 94%, meaning that it misses few cases, the Mt. Sinai researchers add.

Nanoparticles have a great deal of potential in medicine: for diagnostics, as a vehicle for active substances or a tool to kill off tumours using heat. ETH Zurich researchers have now developed particles that are relatively easy to produce and have a wide range of applications.
If you put your hand over a switched-on torch in the dark, it appears to glow red. This is because long-wavelength red light beams penetrate human tissue more effectively than short-wavelength blue light. ETH Zurich researchers exploit this fact in a new kind of nanoparticles: so-called plasmonic particles, which heat up when they absorb near-infrared light. This could enable them to kill tumour tissue with heat, for instance.

Gold is a popular material for nanoparticles used therapeutically, as it is well tolerated and does not usually trigger any undesirable reactions. In the characteristic ball or sphere shape of nanoparticles, however, gold does not have the necessary properties to work as a plasmonic particle that absorbs sufficiently in the near-infrared spectrum of light to heat up. To do so, it needs to be moulded into a special shape, such as a rod or shell, so that the gold atoms adopt a configuration that starts absorbing near-infrared light, thereby generating heat. Producing such nanorods or nanoshells in sufficient amounts, however, is complex and expensive.
A team of researchers headed by Sotiris Pratsinis, Professor of Particle Technology at ETH Zurich, has now discovered a trick to manufacture plasmonic gold particles in large amounts. They used their existing know-how on plasmonic nanoparticles and made sphere-shaped gold nanoparticles that display the desired near-infrared plasmonic properties by allowing them to be aggregated. Each particle is coated with a silicon dioxide layer beforehand, which acts as a placeholder between the individual spheres in the aggregate. Through the precisely defined distance between several gold particles, the researchers transform the particles into a configuration that absorbs near-infrared light and thus generates heat.

‘The silicon dioxide shell has another advantage’, explains Georgios Sotiriou, first author on the study and, until recently, a postdoc in Pratsinis

An optical blood oxygen sensor attached to an endoscope is able to identify pancreatic cancer in patients via a simple endoscopic procedure, according to researchers at Mayo Clinic in Florida.

The study shows that the device, which acts like the well-known clothespin-type finger clip used to measure blood oxygen in patients, has a sensitivity of 92 percent and a specificity of 86 percent.

That means, of 100 patients with pancreatic cancer, this sensor would detect 92 of them, based on the findings. And of 100 patients who don

The UK needs to invest in testing for those men most at risk of prostate cancer rather than follow a cast-the-net-wide approach targeting the whole population, a leading scientist from The University of Manchester – part of Manchester Cancer Research Centre – has argued at an international conference.
Men in the UK are currently entitled to PSA blood test for prostate cancer once they reach the age of 50 and will be recommended to have a prostate biopsy if their PSA level is greater than their age-specific threshold. This practice leaves around 50,000 men in the UK having an unnecessary prostate biopsy every year which is painful, can cause bleeding and infection and rarely even death.
Professor Ken Muir, from The University of Manchester, is proposing the UK moves to a risk-based approach in the community