An American teenager 14 years (photo) no heart has survived for 4 months thanks to a machine, after the failure of a first heart transplant. The patient has to wait until you transplant a new heart and heart function was restored.
During those 4 months, the teenager was connected to a machine equipped with two pumps : one to replace the right ventricle to pump blood to the lungs, and the other to replace the left ventricle and propel the blood through the body.
Marco Ricco The doctor said: "The first heart to transplant did not work properly, which forced us to find another. Meanwhile, we had to connect for 4 months at a pumping system to keep it alive. "
is the first time you use a pump system in pediatrics. The surgeon added: "We can say that a person so young had ever survived this long without a heart" . In addition, the pumping system is often used to support the heart, not to replace it completely. The patient suffered
dilated cardiomyopathy: the heart is dilated and not working well, the only solution is a transplant. During the first two months happened without a heart, she had suffered a lung infection and respiratory failure, kidney and liver. The doctor said, " gradually his condition was improving and we decided to conduct the second transplant, in addition to a kidney transplant. We believe that something like this never happened, but we can not say 100% because we can not know what is happening in other corners of the planet. "
During those 4 months, the teenager was connected to a machine equipped with two pumps : one to replace the right ventricle to pump blood to the lungs, and the other to replace the left ventricle and propel the blood through the body.
Marco Ricco The doctor said: "The first heart to transplant did not work properly, which forced us to find another. Meanwhile, we had to connect for 4 months at a pumping system to keep it alive. "
is the first time you use a pump system in pediatrics. The surgeon added: "We can say that a person so young had ever survived this long without a heart" . In addition, the pumping system is often used to support the heart, not to replace it completely. The patient suffered
dilated cardiomyopathy: the heart is dilated and not working well, the only solution is a transplant. During the first two months happened without a heart, she had suffered a lung infection and respiratory failure, kidney and liver. The doctor said, " gradually his condition was improving and we decided to conduct the second transplant, in addition to a kidney transplant. We believe that something like this never happened, but we can not say 100% because we can not know what is happening in other corners of the planet. "
Link as sound waves, a discovery that could help develop better implants for deaf people. healthy inner ear hair cells used to respond to sounds to stimulate neurons that send signals to the brain. But the hair cells can be destroyed by a disease, a stroke or may contain birth defects.
The hearing provided by the current impantes are good enough to give deaf children the ability to play similarly to other children. However, the implants do not provide fully satisfactory results in environments with music, loud or understand tonal languages \u200b\u200blike Mandarin
. This is because implants only use about 20 electrodes, a rather small number compared to the 3,000 cells from a healthy ear. Use more resources 
stimulus could make a clearer hearing, but may include more electrodes in the tissue implants because they conduct electricity, making the signals from different electrodes interfere with each other. In contrast, laser light is more accurate and does not interfere, allowing the implant to transmit more information neurons. 
To explore this idea, a team led by Claus-Peter Richter, Northwestern University in Chicago lit directory Infrared certain neurons of the inner ear of deaf pigs. At the same time, the researchers recorded the electrical activity of the inferior colliculus, a transmission between the inner ear and the cerebral cortex, producing a set of frequency maps. These maps are good indicators of the quality of auditory information sent to the brain. "
Electrical stimulation of the inner ear by the cochlear implant
produces maps fuzzy, but the light stimulation produced maps that were as accurate as those produced by sound in the auditory system of pigs
" said Richter, who presented the findings in the Medical Bionics Conference (Medicine Bionic) in Lorne, in the Australian state of Victoria. is a mystery how the light stimulates brain cells, the proteins are not sensitive to light. Richter says that the heat that comes to light may play an important role, and his team is now investigating the effect of long-term warming of the neurons. The next challenge will be to create optical fibers and lasers to focus light on the inner ear.
To explore this idea, a team led by Claus-Peter Richter, Northwestern University in Chicago lit directory Infrared certain neurons of the inner ear of deaf pigs. At the same time, the researchers recorded the electrical activity of the inferior colliculus, a transmission between the inner ear and the cerebral cortex, producing a set of frequency maps. These maps are good indicators of the quality of auditory information sent to the brain. "Electrical stimulation of the inner ear by the cochlear implant
produces maps fuzzy, but the light stimulation produced maps that were as accurate as those produced by sound in the auditory system of pigs
" said Richter, who presented the findings in the Medical Bionics Conference (Medicine Bionic) in Lorne, in the Australian state of Victoria. is a mystery how the light stimulates brain cells, the proteins are not sensitive to light. Richter says that the heat that comes to light may play an important role, and his team is now investigating the effect of long-term warming of the neurons. The next challenge will be to create optical fibers and lasers to focus light on the inner ear.
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