Tuesday, February 23, 2010

TECHNOLOGY- A HELPING HAND TO OUR HEALTH

EVALUATE THE IMPORTANCE OF VARIOUS TECHNOLOGIES, INCLUDING CANADIAN CONTRIBUTIONS, TO OUR UNDERSTANDING OF THE INTERNAL BODY SYSTEMS (DIGESTIVE, CIRCULATORY OR RESPIRATORY)

 The average number of people who reside in the world can be counted up to seven billion. Statistics show that 250 babies are born  every minute, when one hundred and 50 thousand die daily. With this information we can conclude that world that the world population is increasing by 150 humans per minute. All human beings have thoughts, worries and dreams about the most marvelous and complex miracle- the Human Body. A comportment and lasting feature of the this body is self curiosity. We continually look for answers in enormous and ever-increasing detail, to understand the action wthin. Medical technologies help us visualise and grasp this remarkable and extraordinady machine.


Imaging is vital to diagnose illness, unravel disease process, and evaluate treatment. Modern techniques have largely replaced surgery in estblishing the presence and extent of the disease. Microscopy has also helped advance biological reachearch. For example, computerized tomography (CT or CAT scan) of the lungs show the capirallies, aveolies, brochie and the bronchioles in detail. The spongy tissues and airways of a health lungs are shows in orange and yellow colors and are very distinct from their denser surroundings. Moreover, the heart and the major blood vessels between the lungs are blue and the vertebrae, ribs and sternum are in dark blue. Other equipments such as the bronchoscope produce an image of the trachea and shows the cartilage rings that keep it from collapsing.

The first physiciancs to record  their patients healing process to enhance patient care were Hoppocrate (460-377BC) and Glen (131-201AD).  Medical practises were based on patients description of the symtopms to identify diseases, until the 19th centuary. During the end of the 18th centuary physicians started studying on the dead bodies and using manual techniques to diagonise illness. One of the first medical technologies invented was a device for measuring the capacity of the lungs by Hutchison. Later came the Sphygnomanometer which measures blood pressure, was invented by Herrisson. By the half of the 20th centuary, medicine was revolutonnized with the extensive care of medical technologies like the thermometer, stethoscope, microscope, ophthalmoscope, laryngoscope and the x-rays. The development of these technologies enabled the doctors to see and hear parts within the body such as the lungs and the heart.These inventions helped us understand more about ourselves and what your body does within you to maintain you health and living. Technology also makes it easier to know when your body is weak and needs assistence.


Canada is a great contributor to the medical world. Some of the world's most proficient inventions and discoveries were made by Canadians. Medical doctors came to Canada along with other French settlers. David parker, who worked in Halifax during the 18th centuary, was the first to operate with anestheia. Making way to Christopher Widmer, who was known as the "Father of surgery" in lower Canada. During the same time W.R Beaumont became a profilic inventor of surgical instruments. Both Christopher Widmer and W.R Beaumont lives during the 19th century. The 20th centuary gifted Canada with some of world best scientists. Two of Canada's major contribution to the medical world was arose during this centuary. The two contributions are:


  1.  The improvement of anesthesia by W.E brown in 1923 and Dr. Harold Griffith in 1942. W.E brown established the value of ethylene as an anesthetic. Dr. Harold Griffith advanced the science of anesthesia by using the curare plant.


  2. The next is the discovery of the fact that recovery rates of patients wound could be drastically improved if the wounds were disinfected.
One of the world's major discoveries was the discovery of insulin. This was discovered and clinically applied by three Candaians, Frederick Banting and Chales Best and  J.J.R Macleod in 1922. This discovery not only helped us learn about a new hormone that effects the metabolim in the body, but also helped develop vacines and medicine for dibete patient, whose bodies fail to control insulin levels. 




These contribution to the medical world were the stepping stone to many of the advanced technologies that we are able to assess today to further understand our body. Today we are able to learn in detail about our organs such as the digestive, circulatory and repiratory  systems because of these technologies. Doctors today are able to visually see the problem and learn about the conditions of the patient with more details that enable for more successful operations and the inventon and discoveries of new medecines for cure of illness.

All the more, countries around the world are struggling to provide medical effeciency to all of its citizens because they are uable to meet medical costs. The solution to this challenge is held by technology. In a cbc article Dr. Anne Doig, president of the Canadian Medical Association, announced the tranformation to our health care system. In the interview she gave to the new reporters she says, "When you have an EMR in your office you make fewer mistakes. And that you can have better information at your finger tips more quickly... They also need to see how these systems connected to other resources such as labs, pharmacies, hospitals and specialists, so that both you and the patients can better manage the care". New IT machines invented try to connect all the data to make health assistence more efficient. Recently, Manitobia set up a multi-million dollar system that centralizes lab results, medication histories and immunization data. Spain has also shown some significant use of technologies that has improved their results by 10 percent. They set up a common data system across 470 primary care clinics. Moreover, during the intial stages of swine flu, that travelled through air recently, Mexico city developed an analytic system that survey the severity and the spreding of the flu. The same system was also set up in Hamilton, Canada to take precautious steps in order to avoid intensity of the flu.

The following link shows a video of an incredible technology developed a few years ago by NASA called Artemis. This technology that makes a 2 dimension CAT scan and make it 3 dimentional. It helps doctors to performs complicated operations safer than before and also shows the importance of technology in medical world. The video touches on the history of medical technology and shows visuals of old instruments used before the 20th century. I hope this video will be enjoyable ro watch.





SOURCES

Nguyen, Giang. "Evolution of medical technology." Evolution fo medical technology (2009). Web. 24 Feb. 2010. http://http//www.brighthub.com/health/technology/articles/7302.aspx.





Steve., Parker,. The Human Body Book. New York: DK ADULT, 2007. Print.

Can Technology Solve The Health Care Crisis? - Smart Shift." CBC.ca - Canadian News Sports Entertainment Kids Docs Radio TV. Web. 26 Feb. 2010. http://www.cbc.ca/smartshift/2010/02/can-technology-solve-the-health-care-crisis.html.



"YouTube - Advances in Medical Technology." YouTube - Broadcast Yourself. Web. 26 Feb. 2010. http://www.youtube.com/watch?v=OXIgvtq-_zc.  
 
Lombardi, Rosie. "Pandemic survelence systems connects five hospitas in haamilton." News and trends. Www.canhealth.com, Nov. & dec. 2009. Web. 25 Feb. 2010 . http://www.cissec.com/images/pdfs/CanadianHealthcareTech.pdf.

"Insulin -." Wikipedia, the free encyclopedia. Web. 26 Feb. 2010. http://en.wikipedia.org/wiki/Insulin.

"Obama: Health Care Costs Too Much, but Technology Can Help - Health Blog - WSJ." WSJ Blogs - WSJ. Web. 26 Feb. 2010. http://blogs.wsj.com/health/2009/01/20/obama-health-care-costs-too-much-but-technology-can-help/tab/article/.

Tuesday, January 12, 2010

ARTIFICIAL SELECTION



Artificial selection is the processs of changing of animals or plants by artificial means. many of the animal breeders are able to change the charactersticcs of dimestic animals by selecting individuals with the most desirble quantities such as speed or racehorses, milk production in cows and trail scentinn and hunting skills in dogs. Moreover, over the years people have grown plants with desirale characterstics. Reseacher state that plants with out these characterstics are less likely to survive because people don't treat these plants as they the artificially selected plants that serve them their purpose. The naturally selected plants are not provided with much fertilizers and pesticides. Eventually, the species of he plant will evolve and the characterstics of the lant that was not recuired by man will sta to disappear.

 


 

 
The term articifial selection was created by Charles Darwin in distinction to natural selection-which is the differential reproduction of orgaanisms with certain traits is attributtd to improved survival or reproductive ability. On the other hand, articficial selection occurs when humans favor specific traits, in natural selection the environment acts as a sieve through which only certain can pass. in other words, thorugh artificial selection, humans select the trait of the animal or plant. Charles Darwin used the concept of srtificial selection to exemplify the wider process of natural selection. There is no real difference in genetic processes of the fundamental artificial and natural selection. The selection is termed as "artificial" when human infuences and liking have an important effect on the evolution of a particular population or species.
  

 
Charles Darwin stated that ancient civilization artificially selected plants for farming and domestic animals unknowing. That humans have been artificially selecting plants and animals knowing or unknowing from generations before. Farmers artificially select plants that will provide more yeild and reproduce faster. There is a lot of variety between individuals in the population.  environmental pressures such as weather,competition within the population for survival and predaion are some of the causes of selection best suitor in natural selection. on the other hand, artificial selection occurs when humans select varaits they prfer, ad will compensate for environmental pressures by sowing seeds, nuturing and protecting the corps. Both types of selection can yeild new species, but artificial selection, when practised strictly, can do so very quickly. Therefore, people should artificially select plants to provide the world with enough healthy food.




Some examples of artificiall breeding in animals are
  • cows are artificially selected to make them stronger, grow faster, reproduce healthy and strong cattle and to produce more milk. These super cows grow stroner muscles and live longer than usual cows.
  • Dogs are artificially selected for their cute looks, stronger smell tracking ability, hunting ability and domestic behaviour.           
                    



Artificial breeding is a good method to increase the production of products such as grains, milk. It also enables the specie to reproduce healthy babies and devolep thier skills such as for dogs hunting and  for faster race horses. Artificial selection like natural selection is another cause of biodiversity in this world. Artificial selection can be called as an ancient art of humans, use it well, for the good of Mother Earth.




SOURCES