Patent ID: 11938092
Assignee: D&D BIOPHARMACEUTICALS, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 21:
22. A medical device comprising:
a body including a housing that defines a lumen and a slot in communication with the lumen, the slot being at a distal end of the housing;
a piston disposed within the lumen, wherein the piston includes two pockets;
an actuator operably coupled to the piston, wherein the piston is movable along the lumen by operating the actuator;
a release button, wherein the release button is coupled to an extension with two arms, each arm insertable into a respective pocket of the two pockets of the piston, and wherein pressing the release button while the arms of the extension are inserted in the pockets moves the arms of the extension away from the piston and causes release of the arms of the extension from the pockets; and
a cartridge insertable into the lumen through the slot, wherein the cartridge includes a first subcartridge proximal to a second subcartridge, the first subcartridge containing a buffer solution and the second subcartridge containing an acylating agent;
wherein the body includes an indicator in the form of a light source configured to emit light a predetermined amount of time after a pH-sensitive composition is prepared by establishing fluid communication between the first subcartridge and the second subcartridge, wherein the light source signals the composition has reached a pH suitable for application to the eye of the subject.