Navigation Links
Lancing tumours into the body

A team of micromachine experts report this week that they have developed tiny spinning screws that could swim along veins, ferrying drugs to infected tissues, or even burrow into tumours to kill them off with a hot lance.Kazushi Ishiyama at Tohoku University in Japan has designed swimming micromachines based on cylindrical magnets.//

Measuring 8 milllimetres long and less than a millimetre in diameter, each magnet is made of a neodymium-iron-boron alloy.Ishiyama made two prototypes to test his idea. The first was designed to move in liquids and had a short section of ceramic pipe attached to each end of the magnet. A wire wound around the pipe’s surface gave it a screw-like thread.

To Test the device, Ishiyama immersed it in a container of silicone oil, which was fixed between two vertical coils of wire. By pumping alternating current through the coils, Ishiyama produced a rotating magnetic field around the container, which set the screw spinning.Because of its threaded surface the screw slowly began to cut through the oil. Its speed increased as the frequency of the rotating magnetic field was ramped up.

Ishiyama’s second prototype, designed to swim and burrow into tissue, used a similar magnet but instead has a pointed, threaded brass tip at one end.This time, Ishiyama tested the device in liquids thicker than oil. He found that it could move at nearly 2 centimetres per second in a thick agar gel. Again, the device moved faster the quicker the magnetic field was rotated, up to a maximum of 20 hertz. Above this frequency, the magnet stopped spinning and ground to a halt.

After the gel tests, Ishiyama decided through real tissue. He found it could screw itself through a 2-centimetre thick chunk of beef steak in 20 seconds. Because the devices are so small, Ishiyama says they could be injected into the body using standard hypodermic needles. Once inside a vein, they could be steered around the body magnetically.Inside the b ody, Ishiyama says the devices could carry drugs to the sites of infection. His latest prototype is even armed with a tiny metal spike that heats up when you apply a second magnetic field vibrating at 100 kHz.

The hot spike could be useful for destroying cancerous tissue, Ishiyama believes. The high frequency field used to heat the metal tip doesn’t interfere with steering the device, he adds.Says Edwin Jager at Linkoping University in Sweden, who is designing tiny robots to manipulate single cells in the body that “surgeons are understandably cautious about the idea of microbots floating free in the body.

If one blocked a blood vessel,” for example, it could be disastrous.He also says that Ishiyama’s prototypes might be too long to safely navigate some of the tighter turns in blood vessels.While Ishiyama concedes that his swimming machines won’t replace standard tools such as catheters for medical operations any time soon, he thinks that nanobots even smaller than this could have a distinct advantage.

'"/>




Related medicine news :

1. Multi billion-dollar suit filed against cell phone firm for causing brain tumours
2. Low-radiation treatment for brain tumours
3. Avastin under trial to test efficacy for pancreatic tumours!
4. Awake Surgery to treat Brain tumours
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/28/2017)... ... February 28, 2017 , ... BrightStar Care Marietta announced that it has received ... Pulse. This award is granted only to top-ranking home care providers, based on client ... ranked among home care providers from across the country who have proven their ability ...
(Date:2/27/2017)... (PRWEB) , ... February 27, 2017 , ... ... mass and overall body strength, which often leads to a host of health ... Journal of the American Geriatrics Society discovered that good overall muscle strength ...
(Date:2/27/2017)... (PRWEB) , ... February 27, 2017 , ... Much attention ... concern for women who become dependent on opioid painkillers has fallen short. From 1999 ... compared to a 237% increase in fatal overdoses in male populations.(1) , The proportion ...
(Date:2/27/2017)... ... February 27, 2017 , ... This webinar , sponsored ... a tool to characterize particle size distributions in the field of geoscience and ... novel scientific findings. It describes methods of optimized and standardized sample collection, preparation ...
(Date:2/27/2017)... Vancouver, BC (PRWEB) , ... February 27, 2017 ... ... top drug rehabilitation and alcohol treatment programs in British Columbia, Canada, at ... (RMT) to its team. The new hire, Mackenzie Alsager, showcases the Centre's commitment ...
Breaking Medicine News(10 mins):
(Date:2/28/2017)... FRANCISCO , February 28, 2017 The global  pulse ... a new report by Grand View Research, Inc. The pulse oximeters market is ... to the growing prevalence of target diseases such as chronic obstructive pulmonary disease ... Continue Reading ... Grand View Research ...
(Date:2/28/2017)... , Feb 28, 2017 Nordic Nanovector ASA (OSE: ... 2016. A presentation of the results by the company,s senior management ... Oslo - details below. ... 2016 was a very successful year for ... development of Betalutin®, progressed with our preclinical candidates and build the ...
(Date:2/27/2017)... Ga., Feb. 27, 2017 Halyard Health, Inc. (NYSE: ... 2016 results and provided its 2017 outlook and related key ... sales were $410 million, a 2 percent increase compared to ... fourth quarter 2016 was $10 million compared to net income ... quarter adjusted net income was $24 million compared to adjusted ...
Breaking Medicine Technology: