Thursday 23 February 2012

A pharmacy inside the body

The results of tests conducted by researchers at the Massachusetts Institute of Technology (MIT) and the company MicroCHIPS in a group of women with osteoporosis opens the door to the widespread use of remote administration of drugs. This was achieved by inserting a microchip under the skin which is capable of administering a medicine, thus allowing the patient to avoid daily injections of drugs.



And can’t patches do that already? Well, there are two main differences: the microchip allows remote control of drug release and also it can be used to administer more than one drug. The chip acts like a pharmacy inside the human body, a technology that can be used to treat from cancer to multiple sclerosis. Thinking further, I also envisaged the possibility of using the chip to administer vaccines automatically at the different stages of human development. And all this in a device with the size of a small pen drive!

And how does it work? The chip contains a daily dose of medication in small wells that are covered by a thin layer of gold nanoparticles which protects and prevents the drug from coming out.  The chip can be programmed to administer the medication according to a programmed schedule or commands sent wirelessly through a special frequency. These commands cause the gold to dissolve and allow the drug entering the bloodstream.

For testing, a group of seven women aged between 65 and 70 had the chip implanted through a simple procedure performed under local anesthesia. For four months the chip administered them an osteoporosis drug called teriparatide in doses comparable to those provided by injections, without any negative side effects.

“We hope this really is the dawn of a whole new way of thinking about delivering medications,” said co-author Robert Langer, a professor of cancer research at the Massachusetts Institute of Technology.  However, for he and his and colleagues, “the ‘hairpin’ road to the clinic might be long and winding, but a versatile implantable device that exploits the microchip approach for controlled drug delivery will be well worth the wait for patients with chronic diseases,”

Sunday 12 February 2012

How doctors choose to die - by Ken Murray

Some food for thought... A provoking and touching article that was published in the guardian this week. The article approaches the controversial topic of dying with dignity, giving up to death in light of a decent quality of life in your final days in earth, instead of trying every possible treatment in a last attempt of surviving. Also, it made me think once more that my time in this world is limited, something that my current healthy state makes me forget.


http://gu.com/p/35bcj


How doctors choose to die

When faced with a terminal illness, medical professionals, who know the limits of modern medicine, often opt out of life-prolonging treatment. An American doctor explains why the best death can be the least medicated – and the art of dying peacefully, at home







A doctor
'Doctors know enough about death to know what all people fear most: dying in pain, and dying alone.' Photograph: Microzoa/Getty Images
Years ago, Charlie, a highly respected orthopaedist and a mentor of mine, found a lump in his stomach. He asked a surgeon to explore the area, and the diagnosis was pancreatic cancer. This surgeon was one of the best in the country. He had even invented a new procedure for this exact cancer that could triple a patient's five-year-survival odds – from five per cent to 15% – albeit with a poor quality of life. Charlie was uninterested. He went home the next day, closed his practice, and never set foot in a hospital again. He focused on spending time with his family and feeling as good as possible. Several months later, he died at home. He received no chemotherapy, radiation, or surgical treatment. Medicare didn't spend much on him.
It's not a frequent topic of discussion, but doctors die, too. And they don't die like the rest of us. What's unusual about them is not how much treatment they get compared to most Americans, but how little. For all the time they spend fending off the deaths of others, they tend to be fairly serene when faced with death themselves. They know exactly what is going to happen, they know the choices, and they generally have access to any sort of medical care they could want. But they go gently.
Of course, doctors don't want to die; they want to live. But they know enough about modern medicine to know its limits. And they know enough about death to know what all people fear most: dying in pain, and dying alone. They've talked about this with their families. They want to be sure, when the time comes, that no heroic measures will happen – that they will never experience, during their last moments on earth, someone breaking their ribs in an attempt to resuscitate them with CPR (that's what happens if CPR is done right).
Almost all medical professionals have seen what we call "futile care" being performed on people. That's when doctors bring the cutting edge of technology to bear on a grievously ill person near the end of life. The patient will be cut open, perforated with tubes, hooked up to machines, and assaulted with drugs. All of this occurs in the intensive care unit at a cost of tens of thousands of dollars a day. What it buys is misery we would not inflict on a terrorist. I cannot count the number of times fellow physicians have told me, in words that vary only slightly: "Promise me that if you find me like this you'll kill me." They mean it. Some medical personnel wear medallions stamped "NO CODE" to tell physicians not to perform CPR on them. I have even seen it as a tattoo.
To administer medical care that makes people suffer is anguishing. Physicians are trained to gather information without revealing any of their own feelings, but in private, among fellow doctors, they'll vent. "How can anyone do that to their family members?" they'll ask. I suspect it's one reason physicians have higher rates of alcohol abuse and depression than professionals in most other fields. I know it's one reason I stopped participating in hospital care for the last 10 years of my practice.
How has it come to this – that doctors administer so much care that they wouldn't want for themselves? The simple, or not-so-simple, answer is this: patients, doctors, and the system.
To see how patients play a role, imagine a scenario in which someone has lost consciousness and been admitted to hospital. As is so often the case, no one has made a plan for this situation, and shocked and scared family members find themselves caught up in a maze of choices. They're overwhelmed. When doctors ask if they want "everything" done, they answer yes. Then the nightmare begins. Sometimes, a family really means "do everything," but often they just mean "do everything that's reasonable". For their part, doctors told to do "everything" will do it, whether it is reasonable or not.
That scenario is a common one. Feeding into the problem are unrealistic expectations of what doctors can accomplish. Many people think of CPR as a reliable lifesaver when, in fact, the results are usually poor. I've had hundreds of people brought to me after getting CPR. Exactly one, a healthy man who'd had no heart troubles (for those who want specifics, he had a "tension pneumothorax"), walked out of the hospital. If a patient suffers from severe illness, old age, or a terminal disease, the odds of a good outcome from CPR are infinitesimal, while the odds of suffering are overwhelming. But, of course, doctors play an enabling role here, too. The trouble is that even doctors who hate to administer futile care must find a way to address the wishes of patients and families. Imagine, once again, the A&E ward with those grieving, possibly hysterical, family members. They do not know the doctor. Establishing trust and confidence under such circumstances is a very delicate thing. People are prepared to think the doctor is acting out of base motives, trying to save time, or money, or effort, especially if the doctor is advising against further treatment.
Some doctors are stronger communicators than others, and some doctors are more adamant, but the pressures they all face are similar. When I faced circumstances involving end-of-life choices, I adopted the approach of laying out only the options that I thought were reasonable (as I would in any situation) as early in the process as possible. When patients or families brought up unreasonable choices, I would discuss the issue in layman's terms that portrayed the downsides clearly. If patients or families still insisted on treatments I considered pointless or harmful, I would offer to transfer their care to another doctor or hospital.
Should I have been more forceful at times? I know that some of those transfers still haunt me. One of the patients of whom I was most fond was a lawyer from a famous political family. She had severe diabetes and terrible circulation, and, at one point, she developed a painful sore on her foot. Knowing the hazards of hospitals, I did everything I could to keep her from resorting to surgery. Still, she sought out outside experts with whom I had no relationship. Not knowing as much about her as I did, they decided to perform bypass surgery on her chronically clogged blood vessels in both legs. This didn't restore her circulation, and the surgical wounds wouldn't heal. Her feet became gangrenous, and she endured bilateral leg amputations. Two weeks later, in the famous medical centre in which all this had occurred, she died.
It's easy to find fault with both doctors and patients in such stories, but in many ways all the parties are victims of a larger system that encourages excessive treatment. Many doctors are fearful of litigation and do whatever they're asked to avoid getting in trouble. Even when the right preparations have been made, the system can still swallow people up. One of my patients was a man named Jack, a 78-year-old who had been ill for years and undergone about 15 major surgical procedures. He explained to me that he never, under any circumstances, wanted to be placed on life support machines again. One Saturday, however, Jack suffered a massive stroke and was admitted to A&E unconscious, without his wife. Doctors did everything possible to resuscitate him and put him on life support. This was Jack's worst nightmare. When I arrived at the hospital and took over Jack's care, I spoke to his wife and to hospital staff, bringing in my office notes with his care preferences. Then I turned off the life support machines and sat with him. He died two hours later.
Even with all his wishes documented, Jack hadn't died as he'd hoped. The system had intervened. One of the nurses, I later found out, even reported my unplugging of Jack to the authorities as a possible homicide. Nothing came of it, of course; Jack's wishes had been spelled out explicitly, and he'd left the paperwork to prove it. But the prospect of a police investigation is terrifying for any physician. I could far more easily have left Jack on life support against his stated wishes, prolonging his life, and his suffering, a few more weeks. I would even have made a little more money, and Medicare would have ended up with an additional $500,000 (£314,500) bill. It's no wonder many doctors err on the side of over-treatment.
But doctors still don't over-treat themselves. Almost anyone can find a way to die in peace at home, and pain can be managed better than ever. Hospice care, which focuses on providing terminally ill patients with comfort and dignity rather than on futile cures, provides most people with much better final days. Amazingly, studies have found that people placed in hospice care often live longer than people with the same disease who are seeking active cures.
Several years ago, my older cousin Torch (born at home by the light of a flashlight) had a seizure that turned out to be the result of lung cancer that had gone to his brain. I arranged for him to see various specialists, and we learned that with aggressive treatment of his condition, including three to five hospital visits a week for chemotherapy, he would live perhaps four months. Ultimately, Torch decided against any treatment and simply took pills for brain swelling. He moved in with me.
We spent the next eight months having fun together like we hadn't had in decades. We went to Disneyland, his first time. We'd hang out at home. Torch was a sport nut, and he was very happy to watch sport and eat my cooking. He even gained a bit of weight, eating his favourite foods rather than hospital food. He had no serious pain, and he remained high-spirited. One day, he didn't wake up. He spent the next three days in a coma-like sleep and then died. The cost of his medical care for those eight months, for the one drug he was taking, was about $20.
Torch was no doctor, but he knew he wanted a life of quality, not just quantity. Don't most of us? If there is a state-of-the-art of end-of-life care, it is this: death with dignity. As for me, my physician has my choices. There will be no heroics, and I will go gentle into that good night.
• Ken Murray, MD, is clinical assistant professor of family medicine at USC. Taken from an article originally published at Zócalo Public Square.

Saturday 11 February 2012

Mobile Health, healthcare for everyone, everywhere

Mobile technology is one of the fastest growing telecommunication industry of the world. It is a fact that, even in poor countries, this technology has experienced tremendous growth, as it is estimated that their population owns more than 2.200 million mobiles. However, the access to a better medical service is still limited, since the developing countries still lack medical professionals and beds in the hospitals. This is how the mHealth was born, referring to the “application of mobile communications and network technologies for healthcare“. mHealth allows to make the most of the current mobile technology to improve healthcare worldwide, especially in emerging countries.

As a result of the emergence of the mHealth field, a first alliance was created in order to address the challenges raised by this new vision of Healthcare. Thus, the mHealth Alliance was established with the purpose of supporting further research and development in the area. The founding fathers committed to create a non-profit mHealth coalition to maximize the impact of mobile technologies on health, especially in emerging economies. The Alliance is hosted by the United Nations Foundation, and was founded by the Rockefeller Foundation, Vodafone Foundation, and UN Foundation. As a result of this Alliance many projects have been started, being the so-called “mHealth for development” one of the most important. This project involves the United Nations Foundation together with the Vodafone Foundation and it is intended to “support the use of rapid response mobile telecommunications to aid disaster relief; to develop health data systems that improve access to health data thereby helping to combat disease; and to promote research and innovative initiatives using technology as an agent and tool for international development”. 26 countries have benefited so far from this initiative, including India, Uganda and South Africa, just to mention a few.


Other interesting projects and mobile health applications include: DataDayne (use of PDAs and mobiles to collect data such as nutritional statistics, medical supply change, immunization and vaccination programs in the field), Text2Change as well as Project Masilulekeis (to spread awareness and education about particular communicative diseases amongst large populations by sending SMS) and SIMPill (a pillbox which is fitted with a SIM card so that a healthcare worker is alerted when the pillbox is opened, letting him know that the patient is taking the medicine). 


And what’s there for the future? Check reports and videos  from the 3rd mHealth Summit which took place in December 2011. The idea was to organise different conferences to explore, examine, and debate the ways mobile technology will transform health care delivery, research, business and policy for the 21st Century. More information and highlights:

Sources:

Saturday 4 February 2012

Nanotechnology against cancer


As today is the World Cancer Day, I would like to draw your attention to what I believe will be the upcoming revolution in the fight against cancer: the nanotechnology.

Nanotech, as it is usually known, can be used to treat diseases like cancer by using nanoparticles which are 1000 times smaller than the thickness of a human hair. These nano particles have the ability to work at a molecular level, targeting the cancer cells and sparing the healthy ones contrary to traditional methods such as chemotherapy. Nanotech is intended to bring improvement to diagnostic and drug administration.

First, it allows better detection of cancer in its early stages and in specific parts of the body that could be missed by the traditional diagnostic methods, such as PET, SPECT, CT and MRI. The nanoparticles used in this case are made of gold and contain an antigen used to attach the nanoparticle to the cancer cell that contains receptors for that antigen. The gold is chosen because in reaction with red light it heats emitting an acoustic wave that can be detected by the medical imaging device. Secondly, the gold nanoparticle could also contain drug molecules with the purpose of killing the cancer cell once attached to it, for example using chemotherapy drug molecules. This kind of treatment brings much more efficient use of the drug, at the same time that it spares the normal cells. Also, another possibility is to heat the gold particles by using radio waves to destroy the cancer cells (Kanzius method).

As you can see, the nanotechnology is a field with enormous potential that will surely change the way we diagnose and treat cancer in the upcoming years. Cancer has won many battles against humanity, but nanotechnology is for the moment one of our biggest hopes of winning the war.


Sources:


Very interesting video that explains how to use nanoparticles to target cancer cells: