A surgical instrument can be used to dilate a tissue within the body of a patient to create a working space within the body to allow a surgeon to easily advance an endoscope into a patient's body. In various embodiments, the surgical instrument can include a balloon capable of transitioning from a collapsed...http://www.google.fr/patents/US20100010303?utm_source=gb-gplus-shareBrevet US20100010303 - INFLATABLE ACCESS DEVICE
