US3976068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drug dispenser for use with intravenous feeding pump
Assignee: ORIGO Inc
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Filing: 1975-01-03
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Granted: 1976-08-24
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Expires: 1995-01-03
Abstract
Abstract This invention relates to a drug dispensing capsule in which the drug may be first mixed with a predetermined quantity of parenteral fluid (the solution to be administered to the patient). It is adapted to be used at the discharge end of an intravenous feeding pump and will automatically switch over to the parenteral fluid as soon as the drug dosage has been dispensed. The device comprises a cylindrical chamber somewhat of the nature of an enlarged hypodermic syringe. It has an inlet at one end and an outlet at the other. A piston-like fluid separator is slidably mounted on the interior of said cylindrical chamber. The drug mixture to be administered is placed in the chamber between the piston and the discharge end of the chamber. The capsule is placed in the pumping system at the discharge end of the pump, the outlet from the device being connected to the tube to the needle inserted in the blood vessel of a patient. When the pump is operated, it pushes the piston axially in the cylinder thereby forcing the drug dosage out of the outlet end of the chamber and into the patient. When the piston reaches the end of the cylinder, the seal between the piston and the wall of the chamber is automatically broken, as by means of ridges projecting inwardly from the wall of the chamber, or by cavities formed in the wall thereof. Means is provided for exhausting air from the chamber, both when the parenteral fluid is introduced into the chamber and when a capsule with its premeasured dosage is placed in the system.
Inventors
- 👤 Ingemar H. Lundquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:06
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/1407; A61M5/1409
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
195 words
A drug dispensing device for a patient adapted for use in conjunction with an intravenous feeding pump providing a source of parenteral fluid supplied aat a controlled rate comprising: a. a cylinder; b. means enclosing both ends of said cylinder; c. a liquid separator slidably fitting inside said cylinder and forming first and second chambers in said cylinder on opposite sides of said liquid separator; d. a fluid inlet into one end of said cylinder in continuous communication with said first chamber and adapted to be connected to said source of parenteral fluid; e. an outlet from the other end of said cylinder; and in continuous communication with said second chamber and adapted to be connected to the patient, f. a drug in a liquid carrier disposed in said second chamber; g. means adjacent said outlet end of said cylinder for bypassing said liquid separator whereby upon introduction of parenteral fluid into said first chamber said liquid separator will be moved to cause said drug in a liquid carrier to be forced into the patient and thereafter parenteral fluid into the patient without breaking the connections between the source of parenteral fluid and the patient.
Claim 2
Dependent Claim
195 words
A drug dispensing device for a patient adapted for use in conjunction with an intravenous feeding pump providing a source of parenteral fluid supplied aat a controlled rate comprising: a. a cylinder; b. means enclosing both ends of said cylinder; c. a liquid separator slidably fitting inside said cylinder and forming first and second chambers in said cylinder on opposite sides of said liquid separator; d. a fluid inlet into one end of said cylinder in continuous communication with said first chamber and adapted to be connected to said source of parenteral fluid; e. an outlet from the other end of said cylinder; and in continuous communication with said second chamber and adapted to be connected to the patient, f. a drug in a liquid carrier disposed in said second chamber; g. means adjacent said outlet end of said cylinder for bypassing said liquid separator whereby upon introduction of parenteral fluid into said first chamber said liquid separator will be moved to cause said drug in a liquid carrier to be forced into the patient and thereafter parenteral fluid into the patient without breaking the connections between the source of parenteral fluid and the patient.
Claim 3
Dependent Claim
25 words
The device of claim 1 together with hydrophobic means carried by the liquid separator for permitting air to pass between said first and second chambers.
Claim 4
Dependent Claim
21 words
The device of claim 2 together with hydrophobic means carried by the cylinder for permitting air to escape from the cylinder.
Claim 5
Dependent Claim
39 words
The device of claim 1 wherein means for bypassing said liquid separator includes at least one channel formed in the inner surface of said cylinder and having a length which is greater than the thickness of the liquid separator.
Claim 6
Dependent Claim
42 words
The device of claim 1 wherein the means for bypassing said liquid separator includes at least one ridge carried by the inner surface of said cylinder adapted to deform said liquid separator and thereby provide a leakage path around said liquid separator.
Claim 7
Dependent Claim
24 words
The apparatus of claim 1 together with guide vanes carried by the liquid separator to prevent tilting of the liquid separator within the cylinder.
Claim 8
Dependent Claim
193 words
Apparatus for administering drugs and parenteral fluids to a patient, a source supplying parenteral fluid at a controlled rate, a container having inlet and outlet ends, means connecting the inlet end to the source of parenteral fluid, a piston-like member slidably disposed in said container forming first and second chambers in said container on opposite sides of said piston-like member with the first chamber being in continuous communication with the inlet end and the second chamber being in continuous communication with the outlet end, said piston-like member forming a liquid tight seal between said first and second chambers, parenteral fluid from said source filling said first chamber, a drug in a liquid carrier filling said second chamber, means for connecting the outlet end to the patient, means carried by the container adjacent to the outlet end of the container for bypassing the piston-like member whereby upon introduction of additional parenteral fluid into the first chamber, the piston-like member is caused to move to force the drug in the liquid carrier into the patient and thereafter parenteral fluid into the patient without breaking the connections between the source of parenteral fluid and the patient.
Claim 9
Dependent Claim
193 words
Apparatus for administering drugs and parenteral fluids to a patient, a source supplying parenteral fluid at a controlled rate, a container having inlet and outlet ends, means connecting the inlet end to the source of parenteral fluid, a piston-like member slidably disposed in said container forming first and second chambers in said container on opposite sides of said piston-like member with the first chamber being in continuous communication with the inlet end and the second chamber being in continuous communication with the outlet end, said piston-like member forming a liquid tight seal between said first and second chambers, parenteral fluid from said source filling said first chamber, a drug in a liquid carrier filling said second chamber, means for connecting the outlet end to the patient, means carried by the container adjacent to the outlet end of the container for bypassing the piston-like member whereby upon introduction of additional parenteral fluid into the first chamber, the piston-like member is caused to move to force the drug in the liquid carrier into the patient and thereafter parenteral fluid into the patient without breaking the connections between the source of parenteral fluid and the patient.
Claim 10
Dependent Claim
34 words
Apparatus as in claim 7, together with hydrophobic means carried by the piston-like member to permit air to pass through said piston-like member from one of said chambers to the other of said chambers.
Claim 11
Dependent Claim
16 words
Apparatus as in claim 8, together with means for permitting escape of air from said container.
Claim 12
Dependent Claim
192 words
In a method for administering drugs and parenteral fluids to a patient by the use of a container having inlet and outlet ends with the outlet end being adapted to be connected to the patient and the inlet end adapted to be connected to a source of parenteral fluid and with a piston-like member slidably mounted within the container and serving to form first and second liquid-tight chambers in the container on opposite sides of the piston-like member with the first of the chambers being in continuous communication with the inlet end and the second of the chambers in continuous communication with the outlet end, the steps of placing a drug to be administered to a patient in a liquid carrier in the second chamber, introducing parenteral fluid into the first chamber to move the piston-like member in the container to force the drug from the second chamber into the patient and thereafter introducing parenteral fluid into the patient by causing the parenteral fluid to bypass the piston-like member after the drug has been supplied to the patient without disturbing the connections to the patient and to the source of parenteral fluid.
Claim 13
Dependent Claim
192 words
In a method for administering drugs and parenteral fluids to a patient by the use of a container having inlet and outlet ends with the outlet end being adapted to be connected to the patient and the inlet end adapted to be connected to a source of parenteral fluid and with a piston-like member slidably mounted within the container and serving to form first and second liquid-tight chambers in the container on opposite sides of the piston-like member with the first of the chambers being in continuous communication with the inlet end and the second of the chambers in continuous communication with the outlet end, the steps of placing a drug to be administered to a patient in a liquid carrier in the second chamber, introducing parenteral fluid into the first chamber to move the piston-like member in the container to force the drug from the second chamber into the patient and thereafter introducing parenteral fluid into the patient by causing the parenteral fluid to bypass the piston-like member after the drug has been supplied to the patient without disturbing the connections to the patient and to the source of parenteral fluid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |