Controlled release portable pump
First Claim
Patent Images
1. A portable pump comprising:
- a first pouch containing a fluid to be pumped and having an outlet;
a second pouch containing a driving medium in pressure transmitting relationship to said first pouch;
a power source for generating a controlled pressure in said driving medium;
a housing containing said first pouch and said second pouch, and including restraining walls defining an interior chamber having a chamber volume and formed and dimensioned to receive both said first pouch and said second pouch in restraining relationship therewith, said first pouch and said second pouch having a combined volume substantially equal to said chamber volume to substantially fill said interior chamber both before and after said power source generates said controlled pressure causing transmitting movement of said second pouch against said first pouch; and
means separate from said power source for delivering a pulse to increase the pressure in said second pouch to produce movement thereof against said first pouch and delivery of a pulse of fluid from said first pouch outlet.
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Abstract
A portable pump, useful for medical and non-medical uses, has two pouches (3, 4) in pressure transmitting relationship, the first (4) containing an infusate (5) and the second (3), a driving medium (2). The driving medium is pressurized in any of a variety of ways, including activation of osmotic pump, electrochemical reaction (19), release of pressurized fluid or gas (21, 23) or mechanical means (24). The rate of infusion is controlled by a rate controller (18). The infusate pouch is separately manufactured and can be stored apart of the rest of the system. Pulses of pumped fluid can also be delivered according to one aspect of the invention (18, 40).
406 Citations
17 Claims
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1. A portable pump comprising:
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a first pouch containing a fluid to be pumped and having an outlet; a second pouch containing a driving medium in pressure transmitting relationship to said first pouch; a power source for generating a controlled pressure in said driving medium; a housing containing said first pouch and said second pouch, and including restraining walls defining an interior chamber having a chamber volume and formed and dimensioned to receive both said first pouch and said second pouch in restraining relationship therewith, said first pouch and said second pouch having a combined volume substantially equal to said chamber volume to substantially fill said interior chamber both before and after said power source generates said controlled pressure causing transmitting movement of said second pouch against said first pouch; and means separate from said power source for delivering a pulse to increase the pressure in said second pouch to produce movement thereof against said first pouch and delivery of a pulse of fluid from said first pouch outlet. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A portable pump comprising:
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a first pouch containing fluid to be pumped and having an outlet; a second pouch containing a driving medium in pressure transmitting relationship to the first pouch; an integral power source comprising a pressure generating means for generating pressure in said driving medium, an activating means for initiating the action of the power generating means, and a rate-controlling means for regulating the volume change of the first pouch; a housing containing the first pouch and the second pouch, the housing including restraining walls defining an interior chamber volume formed and dimensioned to receive both said first pouch and said second pouch in restraining relationship therewith, said first pouch and said second pouch having a combined volume substantially equal to said chamber volume both before and after activation of said pressure generating means, said activation causing transmitting movement of said second pouch against said first pouch; and means separate from said power source for delivering a pulse of driving medium to said second pouch to increase the pressure in said second pouch to produce movement thereof against said first pouch and delivery of a pulse of fluid from said first pouch outlet.
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9. A pharmaceutical delivery system comprising:
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a first pouch including an outlet, and containing therein a drug in dry form, a pharmaceutically acceptable solvent for said drug, and a breakable seal in separating relationship to said drug and said solvent which upon breakage forms a fluid to be pumped from the first pouch outlet; a second pouch containing a driving medium in pressure transmitting relationship to the first pouch; a power source comprising a pressure generating means for generating pressure in the driving medium, an activating means for initiating the action of the pressure generating means, a rate controlling means for regulating the volume change of the first pouch; a housing containing the first pouch, and said second pouch and said power source and including restraining walls defining an interior chamber formed and dimensioned to receive both said first pouch and said second pouch therein, said walls being in restraining relationship with the aforesaid first and second pouches such that the combination of said first and said second pouches substantially fills said chamber at all times; and means separate from said power source for delivering a pulse of driving medium to said second pouch to increase the pressure in said second pouch to produce movement thereof against said first pouch and delivery of a pulse of fluid from said first pouch outlet.
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10. A method for pumping a fluid from a portable pump, said pump comprising a first pouch containing fluid to be pumped and having an outlet;
- a second pouch containing a driving medium having a transmitting surface in pressure transmitting relationship with said first pouch;
power source for generating a controlled pressure in said driving medium; and
a housing containing said first pouch, said second pouch and said power source and including restraining walls defining an interior chamber formed and dimensioned to receive both said first pouch and said second pouch therein, and said walls being in restraining relationship with said first and said second pouches such that the combination of said first and said second pouches substantially fill said chamber, said method comprising the steps of;activating said power source to generate said controlled pressure in said driving medium; inflating said second pouch, in controlled pressure communication with said power source, against said first pouch so that said second pouch transmitting surface exerts pressure on said first pouch facing surface in proportion to said controlled pressure; and
to expel said fluid contained in said first pouch through said outlet at a rate proportional to said inflation expansion of said second pouch; andfurther increasing the pressure in said second pouch in a pulsatile manner to deliver pulse of fluid pumped from the outlet of said first pouch.
- a second pouch containing a driving medium having a transmitting surface in pressure transmitting relationship with said first pouch;
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11. A method for pumping a fluid from a portable pump, said pump comprising a first pouch containing said fluid to be pumped and having an outlet;
- a second pouch containing a driving medium having a transmitting surface in pressure transmitting relationship with a facing surface of said first pouch;
a power source for generating a controlled pressure in said driving medium; and
a housing containing said first pouch and said second pouch, and including restraining walls defining an interior chamber volume formed and dimensioned to receive both said first pouch and said second pouch in restraining relationship therewith, and said first pouch and said second pouch having a combined volume substantially equal to said chamber volume, said method comprising the steps of;activating said power source to generate said controlled pressure in said driving medium; inflating said second pouch, in controlled pressure communication with said power source, against said first pouch so that said second pouch transmitting surface exerts pressure on said first pouch facing surface in proportion to said controlled pressure while maintaining said combined volume substantially equal to said chamber volume both before and after said activating step, said activating step causing transmitting movement of said second pouch against said first pouch;
to cause compression of said first pouch and expelling of said fluid contained in said first pouch through said outlet at a rate proportional to said inflation expansion of said second pouch; andsupplying a pulse of pressure to said first pouch to cause a pulse expulsion of fluid from said first pulse outlet. - View Dependent Claims (12, 13, 14, 15, 16, 17)
- a second pouch containing a driving medium having a transmitting surface in pressure transmitting relationship with a facing surface of said first pouch;
Specification