| A recent in the US is offering hope for
| |
| | why dogs are not trained to detect VOCs
|
| testing for lung cancer. US scientists
| |
| | in the same manner that dogs are trained
|
| have now developed and already tested a
| |
| | to detect drugs and other compounds.
|
| prototype breath test to detect lung
| |
| | The prototype of this device was
|
| cancer. This may enable doctors to detect
| |
| | developed by Dr Peter Mazzone of the The
|
| lung cancer at earlier stages.
| |
| | Cleveland Clinic in Ohio in collaboration
|
| The results of the US study test was
| |
| | with the private company ChemSensing of
|
| published in the international journal of
| |
| | Champaign, Illinois. The private company
|
| respiratory medicine Thorax.
| |
| | customizes Metalloporphyrins, a
|
| In the tests, the colour testing device,
| |
| | chemically reactive dye family that are
|
| which is the size of a coin and is
| |
| | sensitive to VOCs.
|
| surprisingly inexpensive, had a 75 per
| |
| | They are working to develop an
|
| cent success rate in detecting people
| |
| | inexpensive device. The only equipment
|
| with different cancers.
| |
| | available to the public are mass
|
| However, the tests were not 100 per cent
| |
| | spectrometers or gas chromatographs.
|
| accurate. The device showed false
| |
| | These are expensive and require the
|
| positives on people who did not have lung
| |
| | services of an expert to analyse the
|
| cancer. This reduces the device's
| |
| | results.
|
| effectiveness removing doctor's ability
| |
| | The new device resembles a 2 cm square
|
| to start immediate treatments.
| |
| | key fob with a 6 by 6 pattern of coloured
|
| The technique called a "colorimetric
| |
| | dots visible through the plastic casing.
|
| sensor array" picks up the chemical
| |
| | Changes in the pattern of the dots
|
| fingerprint of the breath of people with
| |
| | indicate the presence of VOCs in the
|
| lung cancer that are caused by the
| |
| | breath based on the gas makeup of the
|
| tumours.
| |
| | breath.
|
| Cancers produce volatile organic
| |
| | Scientists tested 143 patients. Patients
|
| compounds (VOCs) that are different from
| |
| | needed to breathe into the device for 12
|
| normal cells. Tumours in the lungs are
| |
| | minutes. The test group was divided into
|
| more likely to contain increased signs of
| |
| | three groups. Some patients had lung
|
| these abnormal compounds. This increases
| |
| | cancer at various stages, some had other
|
| the potential for the device to pick up a
| |
| | forms of respiratory illnesses like
|
| lung cancer "fingerprint" in the breath.
| |
| | emphysema. The rest were healthy.
|
| Surprisingly, dogs are able to detect
| |
| | The device spotted 73 per cent of the
|
| VOCs and differentiate between people
| |
| | lung cancer patients and cleared 72 per
|
| with lung cancer and healthy people. With
| |
| | cent of the non-lung cancer patients.
|
| 'early response' a major factor in
| |
| | This is not 100 per cent, but the results
|
| survival rates, there are many who wonder
| |
| | are acceptable.
|
