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It’s no secret that dogs have a keen sense of smell. The dogs are also able to distinguish which patients with lung cancer and which patients with chronic obstructive pulmonary disease, and can distinguish between smokers and nonsmokers.

German researchers report in the European Respiratory Journal that the dog can be trained to detect lung cancer by sniffing human breath.

Scientists conducting research that is 2 to 4 dogs German shepherd, Lab and a hound dog and an Australian shepherd. These dogs can sniff out cancer in 71 samples of 100 breath samples of lung cancer patients. The dogs are also able to identify cancer-free samples with 93% accuracy rate.

This method is better than the tests that many doctors use today to detect lung cancer. Detection for active smokers for lung health checks with a CT scan once a year. Early detection can reduce the risk of death from lung cancer by 20%.

But besides that way, dogs are also able to distinguish which patients with lung cancer and which patients with chronic obstructive pulmonary disease, and can distinguish between smokers and nonsmokers.

“Our results confirm that the ability to sniff out lung cancer symptoms is quite stable. This is a big step in the diagnosis of lung cancer, but we still need to identify a compound that is exhaled through the patient’s breath,” said Thorsten Walles of Schillerhoehe Hospital.

Several previous studies have described some diseases that can sniff by a dog. Dogs are able to identify bladder cancer and colon cancer with a success rate of 40% to 90%, not to mention his ability to sniff out low blood sugar levels in diabetics.

But there is still much preparation to be done so that dogs can become part of clinical examination. One is the question of how and how long dogs are trained. In the German study, Walles working with dogs for nine months to recognize the odor of cancer.