Multi-lumen syringes for intraocular injections
OwnerItay Chowers, Tomer Batashinventors
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Abstract
There is provided herein a multi-lumen syringe for intraocular injection, including a first lumen, a second lumen, one or more needles fluidly connected to the lumens, and a needle sheath disposed about the one or more needles; wherein the needle sheath includes a plurality of n proximity/contact/pressure actuators on a distal rim of the needle sheath; wherein the syringe is switchable between at least two configurations: a first configuration in which at least one of the actuators is not actuated and each tip of the one or more needles is proximally positioned, and secured, relative to the distal rim; and a second configuration in which the n actuators are actuated, and the one or more needles are allowed to distally extend beyond the distal rim.
Claims19
A multi-lumen syringe for intraocular injection to and/or for intraocular substance withdrawal from an eye of a subject, the syringe comprising a first lumen, a second lumen, a needle fluidly connectable to the first lumen and to the second lumen, a first plunger configured for reciprocal motion within the first lumen, and a second plunger configured for reciprocal motion within the second lumen,
- wherein:
- the syringe is configured for drawing and/or injecting 0-0.4 ml;
- the needle comprises one or more internal or external cutting elements added thereon, configured for cutting vitreous substances in the eye which come into contact with the cutting elements prior to withdrawal thereof from the subject eye;
- and
- the syringe further comprises a locking mechanism configured to prevent the second plunger from being pushed when a volume defined by the first plunger within the first lumen is smaller than a threshold volume.
A method for intraocular fluid injection to and/or for intraocular substance withdrawal from an eye of a subject, the method comprising:
- utilizing a multi lumen syringe comprising a first lumen, a second lumen, a needle fluidly connected to the lumens and comprising one or more external or internal cutting elements added thereon, a first plunger, and a second plunger, wherein the syringe is configured for drawing and/or injecting 0-0.4 ml and further comprises a locking mechanism configured to prevent the second plunger from being pushed when a volume defined by the first plunger within the first lumen is smaller than a threshold volume;
- contacting the eye with a distal tip of the syringe;
- inserting the needle into the eye and utilizing the one or more cutting elements added onto the needle for cutting of vitreous substances in the eye and facilitating withdrawal of fluid from the eye;
- pulling the first plunger of the syringe to withdraw 0-0.4 ml of fluid from the eye into the first lumen;
- and
- pushing the second plunger of the syringe to inject 0-0.4 ml of fluid from the second lumen into the eye.
Dependencies are inferred from the claim text.