Cartridge and injector with the cartridge
A cartridge includes a first opening, a second opening, a channel, an intraocular lens arranged in the channel, and a cartridge plunger arranged in the channel and configured to firstly preload the intraocular lens by moving the cartridge plunger towards the first opening, then to fold the lens by moving it in the tapered region, and finally to push the lens out of the channel via the first opening. The cartridge is configured to be coupled to a syringe such that a fluid can be injected into the channel, and as a result the cartridge plunger can be propelled in a movement direction towards the first opening. The cartridge plunger includes a first cartridge plunger longitudinal end, a second cartridge plunger longitudinal end, and a fluid line via which the fluid can be injected from the second to the first cartridge plunger longitudinal end and finally to the intraocular lens.
1. A cartridge, comprising:
a first opening;
a second opening;
a channel, which extends from the first opening to the second opening and which has a taper;
an intraocular lens arranged in the channel between the first opening and the second opening; and
a cartridge plunger arranged in the channel between the intraocular lens and the second opening and set up to first preload the intraocular lens by displacing the cartridge plunger toward the first opening, then to fold the intraocular lens by displacing the intraocular lens in the taper, and then to push the intraocular lens out of the channel via the first opening,
wherein the cartridge is set up to be coupled with a syringe, such that a fluid can be forced into the channel via the second opening with the syringe and the cartridge plunger can thereby be propelled in a direction of insertion toward the first opening,
wherein the cartridge plunger has a first cartridge-plunger longitudinal end, a second cartridge-plunger longitudinal end, and a fluid line, which extends from the first cartridge-plunger longitudinal end to the second cartridge-plunger longitudinal end, and via which the fluid can be forced in from the second cartridge-plunger longitudinal end to the first cartridge-plunger longitudinal end and then to the intraocular lens,
wherein the cartridge plunger seals the channel in an area of the first cartridge-plunger longitudinal end, such that no fluid can pass through the cartridge plunger on its outer circumference, and
wherein the cartridge plunger has a first portion, which has the first cartridge-plunger longitudinal end and which is flexible, a second portion, which has the second cartridge-plunger longitudinal end, and a third portion, which is arranged between the first portion and the second portion and which has a recess, which is set up to receive parts of the first portion when the cartridge plunger enters the taper.
2. The cartridge as claimed in claim 1 , wherein the first cartridge-plunger longitudinal end, projected in the direction of insertion, has a larger cross section than the second cartridge-plunger longitudinal end, projected in the direction of insertion.
3. The cartridge as claimed in claim 2 , wherein the channel has a first channel portion, in which the second cartridge-plunger longitudinal end is arranged before the fluid is forced into the channel and which has a first cross section, a normal of which is arranged parallel to the direction of insertion and which substantively corresponds to the second cartridge-plunger longitudinal end projected in the direction of insertion, and a second channel portion arranged between the first channel portion and the first opening and which has a second cross section, a normal of which is arranged parallel to the direction of insertion and which is larger than the first cross section, and
wherein a distance from the first opening to the first channel portion is longer than an extent of the cartridge plunger in the direction of insertion.
4. The cartridge as claimed in claim 1 , wherein the first portion has a groove on a side of the first portion facing away from the intraocular lens.
5. The cartridge as claimed in claim 1 , wherein the fluid line has a curve.
6. An injector, comprising:
the cartridge as claimed in claim 1 ; and
the syringe,
wherein the cartridge is coupled to the syringe,
wherein the syringe contains the fluid, and
wherein and the injector is set up to displace the cartridge plunger in the direction of insertion toward the first opening by forcing the fluid into the channel via the second opening with the syringe.
7. The injector as claimed in claim 6 , wherein the syringe has a cannula through which the fluid can be forced out of the syringe.
8. The injector as claimed in claim 7 , wherein the cannula is of such a length that, when the cartridge is coupled to the syringe, the cannula displaces the cartridge plunger so far in a direction of the first opening that the intraocular lens is thereby preloaded.
9. The injector as claimed in claim 7 , wherein the cartridge plunger has at an end facing the syringe a cartridge-plunger recess set up to receive a longitudinal end of the cannula facing the cartridge plunger when the cartridge is coupled to the syringe.