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Title: Face Transplants - Isabelle Dinoire and Other Cases
Source: http://www.lifeinthefastlane.ca/. . ./weird-science
 Shared by: Anonymous
In eFolders: Academia, Computer/Technology/Science, Science


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Face_transplant_Isabelle_Dinoir_2sfw - Face Transplants - Isabelle Dinoire and Other Cases
 

Body grafts don’t look or work like the skin on the face, and they can’t fully restore appearance or movement. But recent advanced medical technologies have enabled partial and full facial transplants of a face from a donor. The result looks and acts far more realistic than skin grafts, but the transplant isn’t without trepidation.

 

A very real concern to any transplant is rejection of foreign tissue from the donor. Anti-rejection drugs developed in the 80’s improved to the point where transplantation surgery became quite routine and far less risky.

 

Doctors made history in 1994 when they performed the first human face reattachment. 9 year old Sandeep Kaur’s hair was caught in the threshing machine as she was chopping grass in northern India, tearing her entire face, scalp and hair off. Sandeep’s family put her face in a bag and drove her to the hospital, where surgeons performed surgery to reattach her face and scalp.

 

She was left with some scars and has never regained full mobility in her face, but she’s been able to lead a normal life. A number of more successful face reattachment surgeries followed, including an operation at Massachusetts General Hospital on a man whose hair was caught in a conveyer belt at work.

 
Face_transplant_Isabelle_Dinoir_1sfw - Face Transplants - Isabelle Dinoire and Other Cases
 
Isabelle Dinoire is wheeled out of the operating room after the first
face transplant surgery. Photo Michael Hugues / AFP
 

The first recipient of the world’s first partial face transplant from a donor was 38 year old Isabelle Dinoire in May 2005. Dinoire took sleeping pills and passed out on her sofa, awaking to find her Black Labrador had chewed off the lower part of her face including her chin, lips and much of her nose, leaving her teeth and gums completely exposed.

 

“I couldn’t believe what I was seeing — it was too horrible.” she told the New York Times. After the incident, Dinoire was forced to eat pureed food and wear a surgical mask to hide her disfigured face.

 

Surgeons Bernard Devauchelle and Jean-Michael Dubernard performed the transplant from a 46 year old female donor who had been left brain dead from a suicide attempt, requiring two medical teams consisting of about 50 professionals to perform the surgery at a hospital in Amiens, France. Within a week after the 15 1/2 hour surgery, Dinoire could speak, eat and drink, but doctors said it would likely be several months before she gained sensitivity in her new skin.

 
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Li Guoxing in July 2006, after the first stage
of his face transplant. China Photos
 

Li Guoxing had been attacked by a bear in his farming field, ripping away most of the right side of his face including part of the bone in his nose and cheek. A team of 18 doctors led by Guo Shuzhong performed a 15 hour operation in 2006 to give him a new nose, upper lip, cheek and eyebrow from a brain-dead donor. The surgery was highly successful, and Guoxing’s new skin even sprouted facial hair and acne within days of the operation.

 

French doctors performed a 3rd partial face transplant in 2007 on a 29 year old man with neurofibromatosis — a disease that causes tumors to grow on nerves throughout the body — leaving him so disfigured he was unable to eat or speak. Doctors gave the man a new nose, mouth, chin and cheeks over a 15 hour operation.

 

The success of these three partial face transplants has prompted doctors to attempt the first full face transplant, which would include an entire face, as well as the ears and hair. In 2004, the Institutional Review Board at the Cleveland Clinic gave doctors there the go-ahead to proceed with the operation. As of 2007, all that was left to do was find the right candidate.

 

Face Transplant Surgery
Candidates must first be physically healthy enough to undergo surgery, and psychologically prepared to handle the emotional stress of undergoing such a huge physical transformation. People who undergo this operation may need counseling to regain some normalcy in their lives.

 
Face_transplant_Li_Guoxing_2sfw - Face Transplants - Isabelle Dinoire and Other Cases
 
Li Guoxing the day before the second stage of his face transplant
in November 2006. China Photos
 

In order to perform a successful face transplant the right match for donor is critical, including similar age and skin tone, blood and tissue to avoid rejection. The tissues must still be connected to an active blood source, so the donor has to be alive on life support, but brain dead with no hope of recovering.

Doctors use a test called HLA typing to find a good match, which looks for proteins called antigens on the surface of tissues. Antigens are what stimulate the body’s immune system to launch an attack and reject foreign tissue. Tissue type is based on a pattern of antigens.

Each of us has a different pattern with the exception of identical twins. The closer the antigens match, the less likely that the recipient will reject the transplanted tissue. In Isabelle Dinoire’s case, doctors gave her an infusion of bone marrow stem cells from the donor to prepare her immune system and reduce the odds of rejection.

Surgeons first cut and peel away the donor’s face. Depending on the extent of the damage to the recipient’s face, the surgeons will take not only the skin but the underlying fat, muscle, cartilage, nerves, arteries and veins, and even bone for extreme cases.

A medical team then transports it on ice to the recipient waiting in another hospital operating room, where the patient is lying in wait after removal of the damaged skin and muscle.

Using microscopic needles and thread, surgeons first connect arteries and veins to the new tissue to supply it with the oxygen-rich blood it needs to live. Not all of the arteries and veins are required to be connected; only a few will ensure that enough blood flows to the face. Nerves and muscles are then connected so the patient has feeling and movement. Doctors drape the donor’s face over the recipient’s skull, adjust it to fit and sew it into place.

The patient will have to take immunosuppressant drugs for the rest of their life to prevent tissue rejection. Those who take immunosuppressive drugs are more likely to develop diabetes, kidney disease, infections and cancer.

If the surgery fails doctors have one of three options — they can remove the face and perform another transplant from a new donor, resurface the face with artificial skin or cover the space with grafts of real skin.

 
Face_transplant_rabbit_sfw - Face Transplants - Isabelle Dinoire and Other Cases
 
Chinese surgeons practiced face transplants on rabbits before humans. China Photos
 

Doctors in China practiced on more than 50 rabbits and 10 human corpses before operating on Li Guoxing. Similar transplantation techniques have been tested on rats and corpses at the Cleveland Clinic, where doctors have been gearing up to perform the first full face transplant.

Face transplants are still subject to controversy — ethical concerns over the donor whose family must be willing to turn off life-support machines while the person is still technically alive, and patients assuming the risks of major surgery when their lives are not technically in danger. The ultra-rich might opt for face transplants simply to look prettier or younger.

It may be years from now until doctors have the face transplant technique down to perform a seamless operation to the point that the recipient has a completely natural looking and performing face. It will also take many years before doctors know the long-term effects of facial transplants.

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