Surgical device

1. A port for laparoscopic surgery, comprising:

an opening having a first flexible, resilient ring member around said opening for attachment to a laparoscopic wound protector;

a second flexible, resilient ring member having a smaller diameter than the first flexible, resilient ring member and being laterally displaced from the first flexible, resilient ring member; and

a flexible membrane forming a hollow, flexible, generally dome-shaped cup, said membrane providing an air-tight seal around the wound, the membrane extending inwardly from the first flexible, resilient ring member towards said second flexible, resilient ring member, the second flexible, resilient ring member extending around the exterior of the dome-shaped cup, the dome-shaped cup within the second flexible, resilient ring member having defined in it a plurality of instrument access points, the port being a single integral piece.

2. The port according to claim 1 , wherein the second flexible, resilient ring member is coaxially aligned with the first flexible, resilient ring member.

3. The port according to claim 1 , wherein the membrane has a thickness in the range 0.1 to 2.5 mm.

4. The port according to claim 1 , wherein the plurality of instrument access points comprises a plurality of tubular extensions of the membrane.

5. The port according to claim 1 , wherein the membrane is elastic.

6. The port according to claim 1 , wherein the membrane is translucent.

7. The port according to claim 1 , wherein the membrane comprises natural or synthetic rubber or silicone.

8. The combination of a port for laparoscopic surgery according to claim 1 , and a wound protector comprising:

third and fourth flexible, resilient ring members; and

a flexible sleeve connected between the circumferences of the third and fourth ring members.

9. The combination according to claim 8 , wherein the first ring member has an inner diameter which is smaller than the outer diameter of at least one of the third and fourth flexible, resilient ring members.

10. A method of performing laparoscopic surgery, comprising:

introducing a wound protector to an incision in a patient;

attaching a laparoscopic port to the wound protector, the port comprised of a single integral piece and comprising an opening having a first flexible, resilient ring member around said opening for attachment to the wound protector, a second flexible, resilient ring member having a smaller diameter than the first flexible, resilient ring member and being laterally displaced from the first flexible, resilient ring member, and a flexible membrane forming a hollow, flexible, generally dome-shaped cup, said membrane providing an air-tight seal around the wound, the membrane extending inwardly from the first ring member in a dome or cylindrical shape towards said second flexible, resilient ring member, the second flexible, resilient ring member extending around the exterior of the dome-shaped cup, the dome-shaped cup within the second flexible, resilient ring member having defined in it a plurality of instrument access points; and inserting a surgical instrument and/or trocar through one of said instrument access points.

11. The method according to claim 10 , further comprising:

tying off the instrument access point using the same material as the membrane.

12. The method according to claim 10 , further comprising:

inserting a pump through one of said instrument access points and insufflating a body cavity inside said incision.

13. The method according to claim 12 , wherein, after insufflation, the port comprises an intra-device space which is external to the body cavity.