Safety vitreous body cutting device
View Patent ↗An embodiment relates to a safety vitreous body cutting device capable of safely removing only a vitreous body attached to a retina without damaging the retina. Here, the safety vitreous body cutting device includes a tubular body part, a cutter part, and a safety net part. The tubular body part is formed in a cylindrical shape, negative pressure is provided at the inside, and an open hole is formed on the outer circumferential surface of a distal end. The cutter part reciprocates along the axial direction of the tubular body part at the inside of the tubular body part to cut the vitreous body introduced into the open hole. The safety net part is provided at the distal end of the tubular body part, and allows the vitreous body to pass through, but prevents the retina tissue from passing through.
1 . A safety vitreous body cutting device, comprising:
a tubular body part having a cylindrical shape, in which a negative pressure is provided at an inside and an open hole is defined on a circumferential surface of a distal end;
a cutter part configured to reciprocate along an axial direction of the tubular body part at the inside of the tubular body part and configured to cut a vitreous body introduced into the open hole; and
a safety net part that is positioned at the distal end of the tubular body part to allow the vitreous body to pass through but prevent a retina tissue from passing through,
wherein the safety net part has a disc-shaped sheet of which a central part is connected to a distal most end of the tubular body part, and a plurality of through-holes formed through the disc-shaped sheet.
2 . The safety vitreous body cutting device of claim 1 , wherein each of the plurality of through-holes is formed in a square shape with vertical and horizontal lengths of 0.09 to 0.11 mm.
3 . The safety vitreous body cutting device of claim 1 , wherein the safety net part includes silicone material and is configured to fold or unfold around the distal end of the tubular body part.
4 . The safety vitreous body cutting device of claim 1 , wherein the safety net part has
a first frame radially disposed at the distal end of the tubular body part, and
a second frame circumferentially connected to the first frame with different diameters to form a mesh together with the first frame.
5 . The safety vitreous body cutting device of claim 4 , wherein the safety net part further has
a third frame having one end connected to the first frame and another end provided to slide along the axial direction of the tubular body part on the circumferential surface of the tubular body part, thereby allowing the first frame to fold or unfold around the distal end of the tubular body part.
6 . The safety vitreous body cutting device of claim 5 , wherein
a sliding groove is formed on the circumferential surface of the tubular body part to guide the another end of the third frame to be inserted and slide.
7 . The safety vitreous body cutting device of claim 4 , wherein
the safety net part includes silicone material and is configured to fold or unfold around the distal end of the tubular body part.
8 . The safety vitreous body cutting device of claim 4 , wherein
the safety net part includes a shape memory polymer, and
the safety net part, which is in a state of being folded around the distal end of the tubular body part, deforms in shape to unfold when inserted into an eye.
9 . The safety vitreous body cutting device of claim 1 , wherein
the safety net part has a circular shape with a diameter of 6 to 7 mm.