Robotic Surgery Systems

Abstract

For many people, the term “robotic surgery” likely evokes one of two images. One is Asimo, the Honda robot, performing a complex heart-valve replacement with the precision and finesse of the most skilled surgeon. The other is more along the lines of an industrial robot found welding on an automotive assembly line—performing surgery by rote programming on scores of patients in a row, just like in a factory. Neither is the case. Robotic surgery is, by some accounts, the next level of minimally invasive surgery. Conventional invasive surgery involves a large incision in the body to gain access to the area and organ of interest. For example, in a conventional gallbladder removal, the surgeon first performs a laparotomy, which is an incision, usually a large one, through the abdominal wall to gain access to the interior of the torso. The problem with a laparotomy is that it is very stressful physiologically and exposes large portions of the patient’s abdominal cavity to infection. Additionally, because the incision is so large, and the surgeon needs access to a large part of the patient’s interior, the surgery is characterized by a relatively large amount of trauma to the surrounding tissue, blood loss, and postoperative pain and discomfort coupled with a prolonged healing period. To overcome the problems and side effects of the laparotomy, minimally invasive surgery was developed. Minimally invasive surgery accesses the chest or abdomen through several smaller incisions, each one typically half an inch long. Each smaller incision has a port, or a combination trocar/port is used to make the incision, to protect the surrounding tissue while a particular device is inserted through the hole. The most common items inserted are an endoscope connected to a camera, a light source (which may be part of the other devices), an insufflator, and an instrument with one or more operating channels. In the case of minimally invasive gallbladder removal, now called a laparoscopic cholecystectomy, all the associated steps (draining the gall bladder, severing it from the ducts, and removing the empty bladder) are performed through the operating channel using specially adapted instruments. In minimally invasive surgery, as few as three or four small incisions can take the place of the much larger laparotomy incision. Some surgeons also perform this procedure as “scarless surgery” by accessing the abdomen through the navel and using a specialized operating endoscope with integral illumination and operating channels. Although there technically is a scar, observers might be hard pressed to find it as it is hidden in the folds of the navel. As one would expect, the smaller incisions mean less trauma to the body as a whole, reduced blood loss, and minimal discomfort, all of which equate to a shorter healing period. Minimally invasive surgery techniques are THE FUNDAMENTALS OF ...