EP0185808A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Automatic parenteral infusion apparatus
Assignee: Individual
•
Filing: 1984-12-13
•
Granted: —
•
Expires: 2004-12-13
Abstract
Abstract @ Automatic parenteral infusion equipment for safely delivering, under substantially constant pressure and at a substantially constant rate of flow, infusion liquid F to a patient's body. The apparatus includes a chamber 10b for containing the infusion liquid F, a pressure force P remote from the infusion liquid chamber 10b, a force transmission means 18 interposed between the pressure source P and the infusion liquid chamber 10b, vent means 10e to discharge compressible or incompressible fluid P used as a force transmission vehicle in order to prevent the possibility of embolism or toxicity to the patient, and flow regulating member 15 including a restricted orifice 15a to deliver infusion liquid F to the patient at a substantially constant rate. Alternative embodiments of the invention are disclosed for adaptation to both ambulatory and immobile patients.
Inventors
- 👤 Jose R. Navato
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 13:33
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/145; A61M5/155; Y; Y10; Y10S; Y10S128/00; Y10S128/12
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
177 words
Automatic parenteral infusion apparatus to deliver infusion liquid to a patient at a substantially constant rate and pressure, said apparatus comprising: a rigid shell having a hollow interior; means within said shell defining an infusion liquid chamber being reducible in volume and adapted for containing infusion liquid; means including a pressure source chamber spaced apart from said infusion liquid chamber to contain a pressure fluid and adapted to supply a substantially constant pressure within an expandable volume; pressure transmission means interposed within said shell between said infusion liquid chamber means and said pressure source chamber means to transmit a substantially constant pressure from said pressure source chamber to said infusion liquid chamber; delivery means connected to said infusion liquid chamber means to delivery infusion liquid at a controlled and constant rate of flow; and vent means in said shell intermediate said infusion liquid chamber means and said pressure source chamber means to provide atmospheric communication with the interior of said shell thereby any pressure leakage from said pressure source chamber means is safely discharged to the atmosphere.
Claim 2
Dependent Claim
177 words
Automatic parenteral infusion apparatus to deliver infusion liquid to a patient at a substantially constant rate and pressure, said apparatus comprising: a rigid shell having a hollow interior; means within said shell defining an infusion liquid chamber being reducible in volume and adapted for containing infusion liquid; means including a pressure source chamber spaced apart from said infusion liquid chamber to contain a pressure fluid and adapted to supply a substantially constant pressure within an expandable volume; pressure transmission means interposed within said shell between said infusion liquid chamber means and said pressure source chamber means to transmit a substantially constant pressure from said pressure source chamber to said infusion liquid chamber; delivery means connected to said infusion liquid chamber means to delivery infusion liquid at a controlled and constant rate of flow; and vent means in said shell intermediate said infusion liquid chamber means and said pressure source chamber means to provide atmospheric communication with the interior of said shell thereby any pressure leakage from said pressure source chamber means is safely discharged to the atmosphere.
Claim 3
Dependent Claim
64 words
The parenteral infusion apparatus as in claim 1, said infusion liquid chamber means including a movable plug member received interiorly of said shell in sealing engagement therewith for containing infusion liquid in one end of said shell and sealingly movable on the interior wall of said shell with the reduction in volume of said infusion liquid as same is discharged from said chamber means.
Claim 4
Dependent Claim
36 words
The parenteral infusion apparatus as in claim 1, said infusion liquid chamber means including a collapsible bladder received interiorly of said shell for containing infusion liquid, said bladder connected for fluid flow with said delivery means.
Claim 5
Dependent Claim
52 words
The parenteral infusion apparatus as in claim 1, said pressure transmission means comprising an expandable bladder positioned within said shell between said pressure source chamber means and said infusion liquid chamber means operable to expand under pressure in said shell to apply a substantially constant pressure on said infusion liquid chamber means.
Claim 6
Dependent Claim
31 words
The parenteral infusion apparatus as in claim 4, including selectively actuated needle means adapted to penetrate said expandable bladder to establish flow communication between said bladder and said pressure source means.
Claim 7
Dependent Claim
70 words
The parenteral infusion apparatus as in claim 1, said pressure transmission means comprising a spool member having first and second plug members disposed within said shell and being interconnected by a rigid support member, said first plug movable within said shell in sealing engagement therewith adjacent said pressure source chamber means and said second plug member movable within said shell in sealing engagenent therewith adjacent said infusion liquid chamber means.
Claim 8
Dependent Claim
32 words
The parenteral infusion apparatus as in claim 1, said delivery means including a flow regulating valve to variably supply a constant rate of flow of infusion liquid at a substantially constant pressure.
Claim 9
Dependent Claim
35 words
The parenteral infusion apparatus as in claim 1, said delivery means including a flow regulating member having a preselectedly sized orifice therethrough to supply a constant flow of infusion liquid at a substantially constant pressure.
Claim 10
Dependent Claim
39 words
The parenteral infusion apparatus as in claim 1, said pressure source chamber means including a fluid passageway of fixed volume filled with incompressible fluid acting upon said pressure transmission means and mechanical force means acting upon said fluid passageway.
Claim 11
Dependent Claim
175 words
Automatic parenteral infusion apparatus to deliver infusion liquid to a patient at a substantially constant rate and pressure, said apparatus comprising: a flexible bag containing a volume of liquid to be infused and having an outlet; flexible tubing means for the flow of said liquid from said bag to said patient means for controlling the rate of flow of said liquid to said patient; an annular bladder surrounding said bag; selectively actuable pressurization means for pressurizing said bladder for effecting pressurization of said liquid in said bag and for maintaining said liquid in said bag under substantially constant pressure as said liquid is emptied from said bag, said pressurization means comprising a closed container, a volume of pressure fluid within said container, and means selectively operable for providing communication between said container and said bladder so as to permit the flow of said fluid from said container to said bladder; and a nonexpansible housing vented to the atmosphere enclosing said bladder with said bag therein, said housing confining said bladder as the latter is pressurized.
Claim 12
Dependent Claim
175 words
Automatic parenteral infusion apparatus to deliver infusion liquid to a patient at a substantially constant rate and pressure, said apparatus comprising: a flexible bag containing a volume of liquid to be infused and having an outlet; flexible tubing means for the flow of said liquid from said bag to said patient means for controlling the rate of flow of said liquid to said patient; an annular bladder surrounding said bag; selectively actuable pressurization means for pressurizing said bladder for effecting pressurization of said liquid in said bag and for maintaining said liquid in said bag under substantially constant pressure as said liquid is emptied from said bag, said pressurization means comprising a closed container, a volume of pressure fluid within said container, and means selectively operable for providing communication between said container and said bladder so as to permit the flow of said fluid from said container to said bladder; and a nonexpansible housing vented to the atmosphere enclosing said bladder with said bag therein, said housing confining said bladder as the latter is pressurized.
Claim 13
Dependent Claim
15 words
Parenteral infusion apparatus as in claim 10, wherein said container is carried by said housing.
Claim 14
Dependent Claim
42 words
Parenteral infusion apparatus as in claim 11, wherein said communication means includes hand-operated actuator means on the exterior of said housing selectively operable to initiate the release of said pressure fluid from said container for pressurization of the liquid in said bag.
Claim 15
Dependent Claim
69 words
Parenteral infusion in claim 12 wherein said communication means comprises conduit means for communication between said container and said bladder, said container having a puncturable seal and said conduit including a hollow lance, said container and said lance being movable relative to one another for puncturing said seal thereby to permit the flow of said pressure fluid from said container to said bladder upon the puncture of said seal.
Claim 16
Dependent Claim
60 words
Intravenous infusion apparatus as in claim 13 wherein said container has a handle extending exteriorly of said housing and guide means for holding said container within said housing and for guiding said container for movement between a first position in which said seal is clear of said lance and a second position in which said lance has punctured said seal.
Claim 17
Dependent Claim
29 words
Parenteral infusion apparatus as in claim 14 wherein said lance is fixed relative to said guide means and said container is movable axially between its first and second positions.
Claim 18
Dependent Claim
45 words
Parenteral infusion apparatus as in claim 15 wherein said container has an axial lug and said guide means has an axial slot for reception of said lug when said container is rotated relative to said guide means for alignment of the lug and the slot.
Claim 19
Dependent Claim
53 words
Parenteral infusion apparatus as in claim 10 wherein said enclosure is rigid and has a closure for at least one end thereof, and wherein said flow rate control means comprises a drip indicator included in said tubing means and valve means for said tubing means, said drip indicator being carried by said closure.
Claim 20
Dependent Claim
26 words
Parenteral infusion apparatus as in claim 17 wherein said housing has means at its other end for hanging said enclosure with said bag outlet facing downwardly.
Claim 21
Dependent Claim
29 words
Parenteral infusion apparatus as in claim 10 wherein said enclosure is rigid and is of generally rectangular cross section, said enclosure being adapted to rest on one side thereof.
Claim 22
Dependent Claim
40 words
Parenteral infusion apparatus as in claims 1 or 10, said pressure fluid comprising a liquid having a normal boiling point below ambient temperature whereby the substantially constant pressure corresponds approximately to the vapor pressure of said liquid at ambient conditions.
References Cited (Backward Citations)
US1869443A
Cited
US2545017A
Cited
US2685878A
Cited
US2842123A
Cited
US3158155A
Cited
US3153414A
Cited
US3965897A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.