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A seal for use in a trocar, particularly for a trocar for eye surgery, having a seal element, with a seal opening, and an instrument opening. The instrument opening extends along a center axis on both sides of the seal element all the way through the seal. The seal also has a clamp element for estab

A seal for use in a trocar, particularly for a trocar for eye surgery, having a seal element, with a seal opening, and an instrument opening. The instrument opening extends along a center axis on both sides of the seal element all the way through the seal. The seal also has a clamp element for establishing a form-fit connection to an instrument that is inserted at least partially into the instrument opening and through the seal opening.

대표청구항 ▼

1. A kit, said kit comprising a trocar and an instrument which is designed for ophthalmology and can be guided through a trocar comprising said trocar, which comprises a cannula with a centre axis, a flange formed integrally on this cannula, an opening extending along the centre axis through the can

1. A kit, said kit comprising a trocar and an instrument which is designed for ophthalmology and can be guided through a trocar comprising said trocar, which comprises a cannula with a centre axis, a flange formed integrally on this cannula, an opening extending along the centre axis through the cannula, and a receiving opening that extends along the centre axis through the flange, said opening and said receiving opening forming an opening that runs all the way through the trocar, wherein a seal is arranged in the receiving opening of the trocar, wherein said seal comprises:a seal element, having a seal opening, a first side and a second side;an instrument opening, which instrument opening extends along a centre axis on said first side and said second side of the seal element all the way through the seal; anda clamping element for establishing a form-fit connection to an instrument that is inserted at least partially into the instrument opening and through the seal opening; whereinsaid instrument comprises a clamp section that is complementary to said clamping element, wherein said clamping element or the instrument or both being designed in such a way that they can be compressed during insertion of the instrument into the seal and such that the original shape of these parts can be recovered when a predefined depth of insertion is reached, such that the surface of said clamping element is in contact with the surface of the complementary section of the instrument, such that a form-fit connection is established between said clamping element of said seal and said clamp section of said instrument. 2. The kit according to claim 1, wherein the complementary section of the instrument has the shape of a groove which extends about a complete or partial circumference and into which a bead of said seal of said clamping element engages. 3. The kit according to claim 1, wherein the complementary section of the instrument has the shape of a bead which extends about a complete or partial circumference and which can be received by a groove arranged on said clamping element. 4. The kit according to claim 1, wherein said clamping element is designed in one piece with the seal. 5. The kit according to claim 1, wherein the seal element is a membrane which extends substantially perpendicular to the centre axis of the seal, and the seal opening comprises at least one slit. 6. The kit according to claim 1, wherein said clamping element is arranged before the seal element, seen in the direction of insertion of an instrument. 7. The kit according to claim 1, wherein said clamping element is designed as a circumferential clamping bead, which reduces the diameter of the instrument opening. 8. The kit according to claim 1, wherein said clamping element is designed as a clamping bead divided into sections, at least three clamping bead sections being formed which reduce the diameter of the instrument opening. 9. The kit according to claim 1, wherein said clamping element is designed as a groove extending about a complete circumference or as a groove divided into sections. 10. The kit according to claim 1, wherein the seal comprises a circumferential flange on its outer face. 11. The kit according to claim 1, wherein the receiving opening comprises a circumferential groove in which a circumferential flange of the seal engages in order to establish a form-fit connection between trocar and seal. 12. The kit according to claim 1, wherein the seal is injected directly into the receiving opening of the trocar by a plastics injection-moulding technique. 13. The kit according to claim 1, wherein the outer circumferential surface of the seal faces and is in contact with the circumferential surface of the opening in the trocar. 14. The kit according to claim 1, wherein the trocar and the seal are produced in one piece from a plastic.