Single-port surgical device and medical device system

A medical device system, comprising:

• a plurality of motion arms each comprising a plurality of arm bodies and a plurality of joints connecting the plurality of arm bodies;
• a plurality of surgical instruments respectively disposed at ends of the plurality of motion arms, each surgical instrument comprising an end device disposed at an end thereof;
• a control system in communication with the plurality of motion arms and for controlling the movement of the plurality of motion arms;
• and
• a single-port surgical device comprising:
• a housing, the housing being tubular and comprising a proximal port formed as a bell mouth and a distal port formed as a contraction port;
• a plurality of cannulas for the plurality of surgical instruments to pass through, each of the plurality of cannulas comprising an inner cannula section and an outer cannula section, wherein the inner cannula section is located in the housing and communicates with the distal port of the housing, the outer cannula section is located outside the proximal port of the housing, and at least a portion of the outer cannula section of at least one of the plurality of cannulas is deformable in a radial direction, an axial direction or the radial direction and the axial direction of the outer cannula section;
• wherein the inner cannula sections of the plurality of cannulas are close to each other in a direction from the proximal port to the distal port so as to be disposed adjacent to one another at the ends thereof close to the distal port and away from one another at the end thereof close to the proximal port, wherein the outer cannula sections of the plurality of cannulas extend outwardly away from one another,
• wherein the inner cannula sections of the plurality of cannulas are fixedly connected to an inner wall of the housing or integrally formed with the housing to form a plurality of fixed rigid channels, so as to avoid relative movements therebetween;
• and wherein
• the single-port surgical device further comprises a plurality of connecting members for detachably and fixedly connecting to the plurality of motion arms respectively, wherein the plurality of connecting members are respectively disposed on the housing and the outer cannula sections of the plurality of cannulas or respectively disposed on the outer cannula sections of the plurality of cannulas.