All posts on January, 2016


colon cancerHealthpreventive screening

At-home screening test is effective alternative to colonoscopy, study finds

An at-home non-invasive screening test for colorectal cancer that can detect microscopic amounts of blood in stool is a “feasible and effective” alternative to colonoscopy, even if used year after year, according to a study published this week in the Annals of Internal Medicine.

That last finding is important, as health experts had been concerned that the effectiveness of this method of colorectal cancer screening — known as the fecal immunochemical test (FIT) — might wane after the first year an individual used it.

The findings also suggest a way of reaching the third of American adults for whom preventive colorectal screening is recommended, but who have never been screened or who are not up to date with it. Many people avoid colonoscopy because of the long and uncomfortable preparation it requires, as well as the invasiveness and unpleasantness of the test itself. Others can’t afford the screening. They are either uninsured, or loopholes in their insurance require high co-pays for the procedure.

Colorectal cancer kills about 52,000 people annually in the United States, making it the nation’s second leading cause of cancer death, according to the Centers for Disease Control and Prevention. It is also one of the most curable types of cancer — if diagnosed and treated early 

Screening for colorectal cancer can be very effective, and is recommended for people who are 50 to 75 years old, which is the age group at greatest risk of developing the cancer. FIT is simple and inexpensive, but needs to be done every year. Colonoscopy is a much more complicated and expensive procedure, but is required only once every 10 years.

A four-year study

For this study, researchers at Kaiser Permanente in Oakland, Calif., analyzed data collected from 323,349 of their health plan members between the ages of 50 and 70 who participated in FIT screening for colorectal cancer over a four-year period. (Those numbers represented about half of the people who were originally sent the screening test and asked to participate.)

To use FIT, people collect a small sample of their stool and then mail it to a laboratory, which looks for microscopic amounts of blood that might indicate a slowly bleeding polyp or cancerous tumor. FIT is similar to, but not the same, as the fecal occult blood test, which uses a different laboratory technique and is not considered quite as effective as FIT at detecting colorectal cancer.

In the first year of this study, FIT detected colorectal cancer in 84.5 percent of participants who were diagnosed with the disease. In the next three years, the test picked up between 73 and 78 percent of the cancers.

“We found that the sensitivity for cancer was somewhat higher in the first year, and that’s not surprising,” said Dr. Douglas Corley, a Kaiser Permanente research scientist, in an interview with HealthDay reporter Dennis Thompson. “The first year you screen someone, for breast cancer or for anything, you’re going to find cancers that have been there for a while that may be larger or are easier to detect.”

High adherence

Another positive finding from the study was that adherence to the screening was high: 86 percent of the participants completed the test for all four years.

All those numbers combined led Corley and his colleagues to conclude that FIT was “both feasible and effective” for screening large groups of people.

Again, this is good news for people who have avoided getting screened for colorectal cancer because they dreaded (or couldn’t afford) a colonoscopy.

“There are a couple different effective tests for colorectal cancer screening, including colonoscopy and FIT,” Corley said in his interview with HealthDay. “They have different strengths and weaknesses. This study provides additional support that FIT can be an important tool for getting more people screened in a way that is both sensitive to picking up cancers and making it easier for people to comply.”

FMI: You’ll find the abstract of the study at the Annals of Internal Medicine website, although the full study is behind a paywall. For information about colorectal cancer, including screening, go to the National Cancer Institute’s website on the disease.

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Macalester student helps his dad fight PTSD-fueled night terrors with mobile technology

For a big part of Tyler Skluzacek’s childhood, his dad, Patrick, couldn’t sleep. A veteran who had served in Iraq from 2005 to 2006, Patrick was awakened most nights by night terrors, intense, violent dreams that are a common symptom of PTSD.

At first, Skluzacek didn’t know his dad couldn’t sleep. But the truth eventually became impossible to ignore.

“I was a kid, and our house was just big enough for me not to hear it,” Skluzacek recalled. “But as high school turned into college I noticed that my dad was really sluggish, tired, irritable, cranky. He eventually told me that he was having a hard time sleeping at night due to flashbacks of things that happened in Iraq.”

The whole family felt the impact of the elder Skluzacek’s sleep deprivation.

“Straight up, my dad was insufferable,” Skluzacek said. “He tried every pill in the book. He tried the VA-sanctioned therapies. They didn’t seem to work very well for him. He was frustrated and exhausted, and it took a pretty heavy toll on all of us. He wasn’t sleeping —and we all had to deal with a man that wasn’t sleeping.”

Skluzacek, who left his hometown of New Prague to attend Macalester College in St. Paul, assumed that his father would likely have a hard time sleeping for the rest of his life. But a little part of him always held out hope that some day he would be able to help his dad get the rest he needed.

Putting coding skills to use

It wasn’t clear how Skluzacek, a computer science, applied math and statistics triple major, would ever be able to help his dad. But then he was given an opportunity to focus his impressive coding skills on the problem.

In September 2015, Skluzacek heard about Hackathon for Health, an event held by the nonprofit HackDC in which coders, developers and medical professionals were invited to come together in the nation’s capital to develop ways that mobile technology could be used to help veterans cope with PTSD.

The event’s theme immediately appealed to Skluzacek.  “I thought, ‘I’ll show up and see what I can do.’ ”

When he arrived at the event, Skluzacek quickly realized that if he wanted to create something that would actually help veterans like his dad, he needed to jump in and learn everything he could about PTSD research in order to create the most useful technology.

Tyler Skluzacek

David Turner/Macalester College
Tyler Skluzacek

The 36-hour event was held “in a giant gymnasium,” Skluzacek recalled, “with tables set up in the middle. On the outside there were booths with technology companies, veterans’ associations, psychiatrists from the VA. If you wanted to go to the next level, you had to get your booty out of your chair and talk to these psychiatrists. A lot of people at the hackathon would not go talk to the psychiatrists, but my team spent a lot of time talking to the them and reading research papers about stress indicators that we could use in our project.”

The team learned that it’s not the night terrors themselves that take a toll on veterans; it’s the fragmented sleep the terrors create. After talking with researchers, Skluzacek and his team landed on the idea of inventing a smartwatch app that could detect and interrupt the terror without fully waking the sleeper.

“These watches have just enough technology on them to track when a night terror is happening,” Skluzacek said. “We can do heart rate, body temp, sounds, movements — and out of all of these we can get a pretty good idea of when a night terror is happening. Then the watch steps in and sends a stimulus to interrupt the night terror, but not fully wake the user.”

myBivy is born

The hacathon was intense — “Over the 36 hours, I got a total of one hour of sleep each night,” Skluzacek recalled, “but by the end, we were actually able to create a semi-functional glue-and-paperclips prototype.” 

Skluzacek’s team, dubbed “The Cure,” won the event’s “Best Mobile Application for Clinicians” category. Their prototype, now known as myBivy, (for bivouac, or the light-weight, portable shelter used by soldiers), took home a $1,500 prize, or $300 each when divided by the five members of the team.

“That’s not that much,” Skluzacek said, “but it’s a lot for a college student who doesn’t have much money.” 

Still, $300 isn’t enough to go from prototype to reality. The team knew it needed more money if they wanted to make their idea fly. They calculated the amount needed to get started and landed on $1,200 to $1,500. “We needed to buy one of every smartwatch,” Skluzacek explained.

So they launched a Kickstarter campaign. Skluzacek’s pitch was very DIY: “I set up a camera stand and talked for five minutes about why our watch was cool, and how we needed money to develop it, and lo and behold, KARE 11 covered us.”  

The local TV news report was picked up around the world. “All of the sudden there was a media flood,” Skluzacek said. Stories were written about myBivy in “USA Today,” “Huffingon Post” and “Gizmodo,” among others.

All the attention worked wonders for the fundraising campaign. “The $1,200 turned into $26,000,” Skluzacek said, and with the infusion of funds, work has begun on the app in earnest. “We still don’t have the money to do a lot of things, but there is a lot of expectation about this app now. Before, it was just about my dad and his Army buddies. Now it needs a mass release or,” he laughs quietly, “there will be mass outrage.” 

Next step: clinical testing and development

The outrage will come from sleep-deprived veterans eager to try out myBivy, which Skluzacek is testing on his father.

The device works like this: “It is tethered to a smartphone,” Skluzacek said. Over several days and nights of wear, “The watch collects a whole bunch of data images. It does calculations and determines if and when the user is having a night terror.”

The technology will run on just about any smartwatch, including the Apple watch or the Samsung watch. “It will run on a Fitbit as well,” Skluzacek said.

“If myBivy detects that the wearer is having a night terror, at first it is going to intervene very softly,” Skluzacek said. “That may not be enough to take you out of your terror, but over time the app will determine the level of interruption that is needed and then adjust to that.”

Skluzacek’s father is a heavy-sleeping mechanic who’s often unaware of loud noises, so his watch had to be adjusted to the point where “he is almost jackhammered on his wrist in the middle of the night,” Skluzacek said. “But it takes him out of a night terror.”

In November, Skluzacek and his team participated in an event in Minneapolis called Mobcon, where inventors and developers bring in their ideas and pitch them to an audience of potential investors.

“There were CEOs, developers of massive apps,” Skluzacek said. “They all got to vote on the ideas. I presented my idea to 500 people. They voted and said that myBivy was the best app here. I won $20,000 in developer credits and $5,000 in legal credits.

Skluzacek still has to finish up his senior year, but now myBivy’s development is moving quickly. “By March, we want to be in clinical testing,” he said. “We are looking at an overall release in May or June.” 

While he stresses that myBivy is really more of a “cheater hack” or a band-aid than a cure — and that veterans with PTSD should continue to seek other therapies for the disorder while using his app — Skluzacek said that the myBivy prototype has been “wildly helpful,” for his own father: “He’s used it for three months now. His buddies are already outraged. They are seeing my dad healthy and full of energy. They want one, too. But I just can’t give it out to everyone. I have to make sure it is tested first.” 

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Adjusting production processes in real time

Industry 4.0 requires comprehensive data collection in order to control highly automated process sequences in complex production environments. One example is the cultivation of living cells. But digitalizing and networking biotech production equipment is a huge challenge: relevant standards have yet to be established, and biology has a dynamic all its own. Using fully automated equipment for producing stem cells, researchers have managed to adjust the process control to cell growth – delivering an adaptive system that is suitable for use in a number of sectors.

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Plasma accelerator research station taking shape

Particle accelerators find many applications in fundamental research, as well as in health, energy and security applications. They range from relatively compact, sometimes even table top devices to km-size particle colliders to unravel the secrets of the universe. In order to reduce the size, costs and complexity of these facilities, particle-driven plasma wakefield acceleration is a very promising alternative to commonly used radiofrequency accelerators. High quality electron beams can act as ideal driver for a plasma that is then used to produce a very high accelerating gradient of the order of GV/m – that is a potential difference of 1 Billion Volt over one meter – to accelerate another electron beam to high energy. The high repetition rate of such scheme is another advantage that shows high promise for a number of application.

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