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Im working forthem.
Registered: 09/17/02
Posts: 701
Electronic nose 'sniffs out cancer'
    #1530092 - 05/08/03 07:53 AM (14 years, 11 months ago)


Electronic nose 'sniffs out cancer'

Could a test like this detect lung cancer?
A breath-test device which can spot people suffering from lung tumours has been put on trial in Italy.

It has long been suspected that patients with a variety of lung problems give off different chemicals in their breath.

And now scientists at the University of Rome have developed a sensor which, they claim, can detect those chemicals flowing out of a cancerous lung.

Their tests, on a group of 60 people - half with lung cancer - pinpointed every single cancer patient.

They suggested that an 'e-nose' could one day form the basis of a screening test for smokers and others at risk of lung disease.

The only way of doing this reliably at the moment is to use a bronchoscope to look directly at the insides of the lungs for signs of cancer.

Chemical signature

Lung cancer patients are known to have higher levels of certain chemicals, called alkanes and benzene derivatives, in their breath.

Other conditions, such as diabetes, asthma, and infections like TB can also produce distinctive chemical signatures.

The sensor array in the e-nose looks for a particular "profile" of chemicals suggestive of cancer.

The test takes approximately a minute to deliver its verdict on the breath of the patient.

'Less accurate'

Dr Carrado Di Natale, head of the team which developed the device, said it had potential as a screening tool.

"It would be less accurate than bronchoscopy but it would be so much easier," he said.

Most lung cancers are not caught early by doctors and they are far tougher to treat as a result.

Dr Richard Sullivan, from Cancer Research UK, said: "Smell is very important for detecting disease, and this is an interesting twist.

"But the study is far too small to mean anything."

The study was reported in New Scientist magazine.

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Registered: 06/18/99
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The Healing Miracles of "Medical Dogs" [Re: TackleBerry]
    #1530095 - 05/08/03 07:56 AM (14 years, 11 months ago)


We've heard about rescue dogs and how their amazing tracking abilities have found lost people and saved lives. But did you ever imagine that dogs could be trained to sniff out cancer?

In Tallahassee, a dermatologist teamed up with retired police sergeant and dog trainer Duane Pickel in an experiment to train a police dog to sniff out melanoma cells. The dog's name is George, a former bomb-sniffing standard schnauzer who once worked with the Tallahassee police force.

The researchers first trained George to recognize the cancer cells in a test tube, then under bandages on a person's body, and finally in volunteer patients who had cancer. After being given the command "show me," George would sniff around the patient and finally place his paw on the tumor location. After being trained, George was able to sniff out cancer in a person's body with close to 100 percent accuracy.

The idea to train George originated in a letter written by two doctors to a British medical journal. The doctors said that a patient came to them to have a mole removed because her dog wouldn't stop sniffing it. It turned out to be malignant, a melanoma of a particularly fast-growing strain. The doctors removed it; the dog's early warning saved her life. It occurred to the doctors that the dog was able to smell the cancer.

"Dogs can smell infinitely better than humans," says Pickel. "In fact, dogs smell much better than the best man-made odor-detecting machines. The best machine we have to date can detect 1 part per billion of an odor. A dog can scent out 1 part per quadrillion."

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Im working forthem.
Registered: 09/17/02
Posts: 701
Re: The Healing Miracles of [Re: Anno]
    #1530099 - 05/08/03 08:01 AM (14 years, 11 months ago)

That is amazing. I need to look into that more.

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