Positioning assembly for retaining and positioning a cornea

本发明公开了一种用于在手术中定位和保持眼睛角膜的定位组件，其包含定位环、可操作地连接着定位环的吸力、吸力增强部分。定位环包含带有角膜接收开孔的保持板、环绕着开孔布置的内脊、从保持板向下伸展的法兰部分。定位环还包含真空口，通过真空口施加的吸力可以将定位环锁紧在眼睛上并使角膜伸过开孔。吸力增强部分优选包含弹性材料段，用于在法兰部分径向内部咬合定位环，并在吸力增强部分与定位环之间形成与真空口连通的吸道。一组吸口成形于所述段上并与吸道具有液流传递功能。当吸力施加到定位环中后，吸力增强部分可以形成围绕着眼睛的增强真空密封，并且防止吸力被阻塞。 An improved positioning assembly for positioning and holding a cornea of an eye during surgery includes a positioning segment, a suction force operably coupled to the positioning segment to temporarily attach it to the eye, and a suction enhancement member. The positioning segment includes a retention plate, having an aperture defined therein to receive the cornea of the eye for engagement with an interior rim disposed in surrounding relation about the aperture, and a flange member extending downwardly from the retention plate in spaced, surrounding relation to the aperture. The positioning segment further includes a vacuum port in fluid flow communication with a point radially exterior of the aperture such that a suction force applied therethrough secures the positioning segment to the eye with the cornea protruding through the aperture. The suction enhancement member preferably includes a resilient material segment structured to engage the positioning segment at a point radially exterior of the aperture, and disposed to define a suction channel between the suction enhancement member and the positioning segment, which channel is in fluid flow communication with the vacuum port. A plurality of suction ports are preferably defined in the segment and in fluid flow communication with the suction channel. When a suction force is applied to the positioning segment, the suction enhancement member effects an improved vacuum seal about the eye and prevents partial or complete occlusion of the suction force.