US3623052A - Automatic infusion apparatus - Google Patents

Automatic infusion apparatus Download PDF

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Publication number
US3623052A
US3623052A US874889A US3623052DA US3623052A US 3623052 A US3623052 A US 3623052A US 874889 A US874889 A US 874889A US 3623052D A US3623052D A US 3623052DA US 3623052 A US3623052 A US 3623052A
Authority
US
United States
Prior art keywords
drip
timer
signal
period
timing period
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US874889A
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English (en)
Inventor
Basil Harry Royston Spiller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Decca Ltd
Original Assignee
Decca Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Decca Ltd filed Critical Decca Ltd
Application granted granted Critical
Publication of US3623052A publication Critical patent/US3623052A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16886—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body for measuring fluid flow rate, i.e. flowmeters
    • A61M5/1689—Drip counters
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
    • G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
    • G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S128/00—Surgery
    • Y10S128/13—Infusion monitoring

Definitions

  • the detector is preferably situated just below the end of the tube 17 where it leads into the drip chamber so that drips in free fall modulate the light beam between the lamp 27 and the cell 23 (which may be a silicon photodiode) so as to provide in response to the passage of each drip a signal which is appropriately amplified and shaped in an amplifier 28 to provide an output pulse.
  • Pulses from the amplifier 28 are fed through an inverter 29 to a monostable circuit 30.
  • This circuit has two outputs 31 and 310 which provide complementary signals: that is to say when the output 31 provides a signal correspond ing to logical zero the output 310 provides an output corresponding to logical unity l these signals are in fact provided in the quiescent state of the monostable circuit 30.
  • the coils 35 and 35a are drive coils for a synchronous motor M used to drive the clamp 21 disposed about the tube in the infusion set. This regulates the pressure drop at the clamp and accordingly the drip rate and the rate of delivery of the infusion fluid to the patient.
  • the circuits driven by the monostable devices 33 and 33a can be replaced by any suitable equivalent according to the type of motor used.
  • the use of timed pulses from the monostable circuits 33 and 33a ensures that the position of the clamp is altered in increments.
  • the motor is driven for a predetermined period in one sense so as to increase the pressure on the tube 19 whereas if the monostable 33a is triggered the motor is driven for an equivalent increment in the opposite sense to release pressure on the tube 19. If neither monostable circuit 33 or 330 is operated no adjustment is made to the clamp and hence no adjustment is then made to the drip rate.
  • the output of the adjustable monostable timing circuit 52 is fed to an input of each of the gates 32 and 32a.
  • the monostable circuit 56 is triggered in response to the output of the monostable 30, provided that the period of the monostable 56 is greater than the period of the monostable 57, after the clock memory is set a subsequent output from the monostable 56 is applied to an input of the gate 55 to reset the memory and thereby open the transistor switch 50 so that the timer can recommence timing.
  • lt is preferred therefore that the monostable delay 57 has a delay of the order of 1.8 milliseconds.
  • An alarm denoting too slow a drip rate may readily be provided using a timer 58 which is reset and restarted in response to each drip and which has a timing period of 30 seconds or more. If the timer reaches the end of its timing period a detector 59 senses that end and an alarm 60 is operated. A diode pump integrator 61 Lfed with a pulse in response to each drip may be arranged to operate an alarm 63 if the stored integration is too high, an excessive integration being sensed by a detector 62.
  • infusion apparatus comprising means for forming infusion fluid into successive drips and a delivery device for said infusion fluid, said delivery device including adjustable means responsive to corrective signals for varying the drip rate and thereby the rate at which the infusion fluid is delivered
  • control apparatus comprising: means for detecting the drips; a timer; means for starting the timer in response to the occurrence of a drip, said timer providing a predetermined timing period; and control means, coupled to said means for detecting and said timer, for tending to correct the drip rate in response to disparity between the occurrence of a subsequent drip and the end of the said timing period, said control means including first means for causing a predetermined drip rate decreasing adjustment, independent in magnitude of said disparity, to said adjustable means when said subsequent drip occurs before the end of the timing period and second means for causing a predetermined drip rate increasing adjustment, independent in magnitude of said disparity, to said adjustable means when said subsequent drip occurs after the end of the timing period.
  • Apparatus as claimed in claim 3 further comprising means under the control of the timer arranged to provide a third signal at times other than during a further period afler the end of said timing period, said AND circuits being operative to cause changes in the drip rate only during their reception of the third signal.
  • control means includes two circuits each triggerable to provide a fixed duration signal to said motor, one of the said two circuits being arranged to be triggered if the said subsequent drip occurs within the timing period and the other circuit is arranged to be triggered if the said subsequent pulse occurs after the end of the said further period.
  • the timer comprises a capacitor, a triggerable constant current generator for charging the capacitor and means responsive when the voltage across the capacitor attains a predetermined value.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Vascular Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
US874889A 1968-12-12 1969-11-07 Automatic infusion apparatus Expired - Lifetime US3623052A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB59230/68A GB1253817A (en) 1968-12-12 1968-12-12 Improvements in or relating to automatic infusion apparatus

Publications (1)

Publication Number Publication Date
US3623052A true US3623052A (en) 1971-11-23

Family

ID=10483332

Family Applications (1)

Application Number Title Priority Date Filing Date
US874889A Expired - Lifetime US3623052A (en) 1968-12-12 1969-11-07 Automatic infusion apparatus

Country Status (10)

Country Link
US (1) US3623052A (fr)
JP (1) JPS5145914B1 (fr)
BE (1) BE742293A (fr)
CH (1) CH499987A (fr)
DE (1) DE1962191A1 (fr)
ES (1) ES374466A1 (fr)
FR (1) FR2025981A1 (fr)
GB (1) GB1253817A (fr)
NL (1) NL155734B (fr)
SE (1) SE362586B (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700904A (en) * 1971-03-02 1972-10-24 Nilsen Mfg Co Liquid flow control arrangement
US3739777A (en) * 1971-05-10 1973-06-19 D Gregg Intravenous feeding apparatus and system
US3890968A (en) * 1971-06-25 1975-06-24 Sci Systems Inc Fluid flow control means
US4001801A (en) * 1973-11-21 1977-01-04 Crinospital S.P.A. Automatic low throughput metering apparatus for selecting and controlling the flow rate of liquids
US4030356A (en) * 1975-03-28 1977-06-21 Technical Industries, Inc. Continuous weighing mechanism for fluids
US4116230A (en) * 1976-09-10 1978-09-26 Gorelick Donald E Blood pressure cuff automatic deflation device
WO1982003554A1 (fr) * 1981-04-15 1982-10-28 Dean L Kamen Systeme de commande de l'ecoulement d'un fluide
US4460353A (en) * 1980-09-08 1984-07-17 Imed Corporation Drop controller
US5855295A (en) * 1996-07-13 1999-01-05 Kwangju Electronics Co., Ltd. Automatic washing apparatus and method of washing automatic vending machines
CN113877026A (zh) * 2021-07-15 2022-01-04 刘银环 智能化输液策略选择系统

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4037598A (en) * 1974-08-12 1977-07-26 Ivac Corporation Method and apparatus for fluid flow control
IL51320A (en) * 1976-01-26 1980-09-16 Baxter Travenol Lab Method and apparatus for metered infusion of fluids
DE3311274A1 (de) * 1982-04-05 1983-10-06 Ipco Corp Infusionsueberwachungsgeraet
US4469480A (en) * 1983-02-11 1984-09-04 Baxter Travenol Laboratories, Inc. Intermittent drop detecting method and apparatus
GB2199405A (en) * 1986-12-31 1988-07-06 Lin Jin Long Drop rate sensor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3197068A (en) * 1964-04-27 1965-07-27 Corbin Farnsworth Inc Apparatus for monitoring the dispensing of liquid
US3252623A (en) * 1965-07-22 1966-05-24 C F Liquidation Corp Apparatus for monitoring dispensing of liquid
GB1109175A (en) * 1964-08-05 1968-04-10 Decca Ltd Improvements in or relating to drip feed apparatus
US3390577A (en) * 1965-09-24 1968-07-02 Gen Instrument Corp Monitoring system for fluid flow in drop form
US3450153A (en) * 1967-06-26 1969-06-17 Gen Electric Electrical pulse generator and regulator for fluid flow and like control systems

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3197068A (en) * 1964-04-27 1965-07-27 Corbin Farnsworth Inc Apparatus for monitoring the dispensing of liquid
GB1109175A (en) * 1964-08-05 1968-04-10 Decca Ltd Improvements in or relating to drip feed apparatus
US3252623A (en) * 1965-07-22 1966-05-24 C F Liquidation Corp Apparatus for monitoring dispensing of liquid
US3390577A (en) * 1965-09-24 1968-07-02 Gen Instrument Corp Monitoring system for fluid flow in drop form
US3450153A (en) * 1967-06-26 1969-06-17 Gen Electric Electrical pulse generator and regulator for fluid flow and like control systems

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700904A (en) * 1971-03-02 1972-10-24 Nilsen Mfg Co Liquid flow control arrangement
US3739777A (en) * 1971-05-10 1973-06-19 D Gregg Intravenous feeding apparatus and system
US3890968A (en) * 1971-06-25 1975-06-24 Sci Systems Inc Fluid flow control means
US4001801A (en) * 1973-11-21 1977-01-04 Crinospital S.P.A. Automatic low throughput metering apparatus for selecting and controlling the flow rate of liquids
US4030356A (en) * 1975-03-28 1977-06-21 Technical Industries, Inc. Continuous weighing mechanism for fluids
US4116230A (en) * 1976-09-10 1978-09-26 Gorelick Donald E Blood pressure cuff automatic deflation device
US4411649A (en) * 1979-07-12 1983-10-25 Baxter Travenol Laboratories, Inc. Fluid flow control system
US4460353A (en) * 1980-09-08 1984-07-17 Imed Corporation Drop controller
WO1982003554A1 (fr) * 1981-04-15 1982-10-28 Dean L Kamen Systeme de commande de l'ecoulement d'un fluide
US5855295A (en) * 1996-07-13 1999-01-05 Kwangju Electronics Co., Ltd. Automatic washing apparatus and method of washing automatic vending machines
CN113877026A (zh) * 2021-07-15 2022-01-04 刘银环 智能化输液策略选择系统

Also Published As

Publication number Publication date
ES374466A1 (es) 1972-01-01
DE1962191A1 (de) 1970-10-29
SE362586B (fr) 1973-12-17
DE1962191B2 (fr) 1971-09-16
GB1253817A (en) 1971-11-17
CH499987A (de) 1970-12-15
NL155734B (nl) 1978-02-15
BE742293A (fr) 1970-05-04
JPS5145914B1 (fr) 1976-12-06
FR2025981A1 (fr) 1970-09-11
NL6918588A (fr) 1970-06-16

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