Eyedrop delivery system

• US 5,171,306 A
• Filed: 03/13/1991
• Issued: 12/15/1992
• Est. Priority Date: 03/13/1991
• Status: Expired due to Fees

• Current Assignee: Van T. Vo
• Original Assignee: Van T. Vo
• Inventors: Vo, Van T.
• Primary Examiner(s): Isabella, David
• Assistant Examiner(s): REICHLE, KARIN M
• Application Number:
  US07/668,881
• Time in Patent Office: 643 Days
• Field of Search: 604/289, 604/296, 604/294, 604/295, 604/296, 604/297, 604/298, 604/300, 604/27, 604/28, 604/30-34, 604/131-134, 604/140, 604/141, 604/146, 604/147, 604/151, 604/152 , 604/153, 604/154, 604/245-250
• US Class Current: 604/295
• CPC Class Codes: A61F 9/0008 Introducing ophthalmic products into the ocular cavity or retaining products therein putting in contact lenses A61F9/0061; introducing or retaining media in cavities of the body in general A61M31/00
• CPC Class Codes: G02C 11/00 Non-optical adjuncts; Attachment thereof G02C7/16 takes precedence
• CPC Class Codes: G02C 5/001 specially adapted for particular purposes, not otherwise provided for or not fully classifiable according to technical characteristics, e.g. therapeutic glasses

Abstract

An eyedrop delivery system for administering eyedrops to at least one eye of a user, wherein the system comprises a fluid reservoir for holding a supply of eyedrop fluid, a tube for conducting eyedrop fluid from the fluid reservoir to at least one eye of the user, the tube comprising at least one distal end portion terminating adjacent the at least one eye of the user, fluid driving apparatus for continuously urging eyedrop fluid from the fluid reservoir through the tube toward the at least one distal end portion of the tube, and fluid control apparatus for successively (1) permitting eyedrop fluid to flow freely through the tube so that the eyedrop fluid can begin to exit the at least one distal end portion of the tube, (2) interfering with the flow of eyedrop fluid through the tube so as to prohibit any further eyedrop fluid from exiting the at least one distal end portion of the tube, and so as to cause the eyedrop fluid leaving the at least one distal end portion of the tube to exit the at least one distal end portion of the tube as a discrete eyedrop, and (3) withdrawing the fluid remaining in the tube away from the at least one distal end portion of the tube so that the distal-most portion of the fluid is disposed within, and is substantially engulfed by, the tube, whereby the distal-most portion of the fluid can create a super-saturated vapor condition at that point in the tube.

Claims

1. An eyedrop delivery system for administering eyedrops to at least one eye of a user, said system comprising:

a fluid reservoir for holding a supply of eyedrop fluid;

tubing means for conducting eyedrop fluid from said fluid reservoir to at least one eye of the user, said tubing means comprising at least one distal end portion adapted to terminate adjacent the at least one eye of the user;

fluid driving means for continuously urging eyedrop fluid from said fluid reservoir through said tubing means toward said at least one distal end portion of said tubing means; and

fluid control means for successively;

(1) permitting eyedrop fluid to flow freely through said tubing means so that eyedrop fluid can begin to exit said at least one distal end portion of said tubing means,

(2) interfering with the flow of eyedrop fluid through said tubing means so as to prohibit any further eyedrop fluid from exiting said at least one distal end portion of said tubing means, and so as to cause the eyedrop fluid beginning to exit said at least one distal end portion of said tubing means to exit said at least one distal end portion of said tubing means as a discrete eyedrop, and

(3) withdrawing the eyedrop fluid remaining in said tubing means away from said at least one distal end portion of said tubing means so that the distal-most portion of the eyedrop fluid is disposed within, and is substantially engulfed by, said tubing means so the distal-most portion of the eyedrop fluid may create a super-saturated vapor condition at that point in said tubing means.

2. An eyedrop delivery system according to claim 1 wherein said fluid reservoir comprises a bellows-type container.

3. An eyedrop delivery system according to claim 1 wherein said fluid reservoir comprises a bellows-type container having compressible side walls, a movable floor, and an immovable lid having an outflow opening, and further wherein said fluid driving means comprises means for moving said floor toward said lid.

4. An eyedrop delivery system according to claim 3 wherein said means for moving said floor toward said lid comprises a constant force spring.

5. An eyedrop delivery system according to claim 1 wherein said tubing means comprises a resilient hollow tube portion,

and further wherein said fluid control means comprises movable wiper means for successively:

1) not engaging said resilient hollow tube portion;

2) engaging said resilient hollow tube portion so as to press against it and close it off at the point of engagement, and

3) engaging said resilient hollow tube portion along a travelling point of engagement which moves in a direction opposite to the flow of fluid through said resilient hollow tube portion away from said point of engagement.

6. An eyedrop delivery system according to claim 5 wherein said movable wiper means moves in a rotating arc, and further wherein said resilient hollow tube portion is positioned substantially tangentially to said rotating arc.

7. An eyedrop delivery system according to claim 6, wherein said movable wiper means comprises a rotating shaft, at least one arm attached to said rotating shaft so as to rotate therewith, and a support block having a concave surface thereof,

said resilient hollow tube portion residing against said concave surface, and

said shaft, said at least one arm, said resilient hollow tube and said support block being sized and positioned so that said at least one arm will engage and close off said resilient hollow tube portion along the travelling point of engagement when said shaft is rotated.

8. An eyedrop delivery system according to claim 7 wherein said support block has a shallow groove formed in said concave surface, said shallow groove being sized to provide a seat for said resilient hollow tube portion such that said resilient hollow tube portion extends out of said shallow groove when said resilient hollow tube portion resides in said shallow groove.

9. An eyedrop delivery system according to claim 1 wherein said fluid reservoir comprises a bellows-type container, and said fluid driving means comprises means for contracting the volume of said bellows-type container.

10. An eyedrop delivery system according to claim 1 wherein said system further comprises a microcomputer means for operating said fluid control means.

11. An eyedrop delivery system according to claim 1 wherein said system further comprises eye and eyelid detecting means for detecting the position of the at least one eye of the user and the position of its associated eyelid prior to eyedrop ejection and preventing eyedrop ejection when the at least one eye of the user is in a disadvantageous position or when its associated eyelid is closed.

12. An eyedrop delivery system according to claim 11 wherein said eye and eyelid detecting means comprises at least one light beam source and at least one light beam detector.

13. An eyedrop delivery system according to claim 1 wherein said system further comprises support means for supporting said at least one distal end portion of said tubing means adjacent the at least one eye of the user, said support means being adapted to be worn about the head of the user and comprising adjustable means for adjusting the position of said at least one distal end portion of said tubing means relative to the at least one eye of the user.

14. An eyedrop delivery system according to claim 1 wherein said system further comprises operating means for operating said fluid control means so as to cause said eyedrop delivery system to automatically administer an eyedrop to the at least one eye of the user according to a predetermined pattern.

15. An eyedrop delivery system according to claim 1 wherein said system further comprises operating means for operating said fluid control means so as to cause said eyedrop delivery system to administer an eyedrop to the at least one eye of the user.

16. A method for delivering eyedrops to at least one eye of a user, said method comprising the steps of:

(1) providing an eyedrop delivery system comprising;

a fluid reservoir for holding a supply of eyedrop fluid;

tubing means for conducting eyedrop fluid from said fluid reservoir to at least one eye of the user, said tubing means comprising at least one distal end portion adapted to terminate adjacent the at least one eye of the user;

fluid driving means for continuously urging eyedrop fluid from said fluid reservoir through said tubing means toward said at least one distal end portion of said tubing means; and

fluid control means for successively;

(i) permitting eyedrop fluid to flow freely through said tubing means so that eyedrop fluid can begin to exit said at least one distal end portion of said tubing means,

(ii) interfering with the flow of said eyedrop fluid through said tubing means so as to prohibit any further eyedrop fluid from exiting said at least one distal end portion of said tubing means, and so as to cause the eyedrop fluid beginning to exit said at least one distal end portion of said tubing means to exit said at least one distal end portion of said tubing means as a discrete eyedrop, and

(iii) withdrawing the eyedrop fluid remaining in said tubing means away from said at least one distal end portion of said tubing means so that the distal-most portion of the eyedrop fluid is disposed within, and is substantially engulfed by, said tubing means so that distal-most portion of the eyedrop fluid may create a super-saturated vapor condition at that point in said tubing means;

(2) continuously urging eyedrop fluid from said fluid reservoir through said tubing means toward said at least one distal end portion of said tubing means with said fluid driving means;

(3) causing said fluid control means to permit eyedrop fluid to flow freely through said tubing means so that eyedrop fluid can begin to exit said at least one distal end portion of said tubing means;

(4) causing said fluid control means to interfere with the flow of said eyedrop fluid through said tubing means so as to prohibit any further eyedrop fluid from exiting said at least one distal end portion of said tubing means, and so as to cause the eyedrop fluid beginning to exit said at least one distal end portion of said tubing means to exit said at least one distal end portion of said tubing means as a discrete eyedrop;

(5) causing said fluid control means to withdraw the eyedrop fluid remaining in said tubing means away from said at least one distal end portion of said tubing means so that the distal-most portion of the eyedrop fluid is disposed within, and is substantially engulfed by, said tubing means so the distal-most portion of the eyedrop fluid may create a super-saturated vapor condition at that point in said tubing means; and

(6) thereafter repeating Steps (3), (4) and (5) in sequence whenever it is desired to administer another eyedrop to the at least one eye of the user.

17. An eyedrop delivery system for administering eyedrops to at least one eye of a user, said system comprising:

a fluid reservoir for holding a supply of eyedrop fluid;

tubing means for conducting eyedrop fluid from said fluid reservoir to at least one eye of the user, said tubing means comprising at least one distal end portion adapted to terminate adjacent the at least one eye of the user; and

fluid control means for selectively (1) driving eyedrop fluid from said fluid reservoir through said tubing means so that discrete eyedrops exit said at least one distal end portion of said tubing means and are administered to the at least one eye of the user, and (2) withdrawing the fluid remaining in said tubing means away from said at least one distal end portion of said tubing means so that the distal-most portion of the fluid is disposed within, and is substantially engulfed by, said tubing means so the distal-most portion of the fluid may create a super-saturated vapor condition at that point in said tubing means;

wherein said tubing means comprises a resilient hollow tube portion, and further wherein said fluid control means comprises driving means for continuously driving eyedrop fluid from said fluid reservoir toward said at least one distal end portion of said tubing means, and rotating wiper means for selectively engaging said resilient hollow tube portion so as to press against it and close it off at the point of engagement.

18. An eyedrop delivery system according to claim 17 wherein said rotating wiper means further engages said resilient hollow tube portion along a travelling point of engagement, which travels in a direction opposite to the flow of eyedrop fluid through said resilient hollow tube portion away from the point of engagement.

19. An eyedrop delivery system according to claim 18 wherein said rotating wiper means comprises a rotating shaft and at least one arm attached to said rotating shaft so as to rotate therewith, and a support block having a concave surface thereon,

said resilient hollow tube portion residing against said concave surface;

and

said shaft, said at least one arm, said resilient hollow tube portion and said support block being sized and positioned so that said at least one arm will engage and close off said resilient hollow tube portion along the travelling point of engagement when said shaft is rotated.

20. An eyedrop delivery system according to claim 19 wherein said support block has a shallow groove formed in the concave surface, said groove being sized to provide a seat for said resilient hollow tube portion.