The invention also relates an improved technique of performing {HEAD ~ surgery} through {TAIL ~ a flexible surgical port} extending into the thoracic cavity and to an improved obturator for installing a flexible trocar tube or cannula which provides the surgical port 
The invention also relates an improved technique of performing { HEAD ~ surgery } through { TAIL ~ a flexible surgical port } extending into the thoracic cavity and to an improved obturator for installing a flexible trocar tube or cannula which provides the surgical port
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH