WO2014036589A1 - Burette - Google Patents

Burette Download PDF

Info

Publication number
WO2014036589A1
WO2014036589A1 PCT/AU2013/000806 AU2013000806W WO2014036589A1 WO 2014036589 A1 WO2014036589 A1 WO 2014036589A1 AU 2013000806 W AU2013000806 W AU 2013000806W WO 2014036589 A1 WO2014036589 A1 WO 2014036589A1
Authority
WO
WIPO (PCT)
Prior art keywords
burette
chamber
passages
valve
passage
Prior art date
Application number
PCT/AU2013/000806
Other languages
English (en)
Inventor
Geoffrey Daniel Daly
Original Assignee
Analytica Limited
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
Priority claimed from AU2012903870A external-priority patent/AU2012903870A0/en
Application filed by Analytica Limited filed Critical Analytica Limited
Publication of WO2014036589A1 publication Critical patent/WO2014036589A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02—Burettes; Pipettes
    • B01L3/0203—Burettes, i.e. for withdrawing and redistributing liquids through different conduits
    • 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
    • A61M5/1412—Burettes, measuring cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/06—Fluid handling related problems
    • B01L2200/0689—Sealing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/06—Valves, specific forms thereof
    • B01L2400/0622—Valves, specific forms thereof distribution valves, valves having multiple inlets and/or outlets, e.g. metering valves, multi-way valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/06—Valves, specific forms thereof
    • B01L2400/0633—Valves, specific forms thereof with moving parts

Definitions

  • the present invention relates to burettes and more particularly but not exclusively to medical burettes used to administer intravenous liquids.
  • the further liquid may also be delivered via a septum or like device.
  • a yet further disadvantage is the complexity of operation, making it difficult for medical professionals to correctly operate the burettes and associated clamps when compared with the operation of standard (ISO 8536-5) burettes.
  • a burette including:
  • a hollow body providing a primary liquid inlet, a generally upright longitudinal axis, and enclosing a chamber to receive a liquid, a chamber first inlet and a chamber second inlet, and a chamber outlet;
  • valve being operatively associated with the first chamber inlet to close the first chamber inlet when liquid in the chamber exceeds a predetermined level
  • the second valve being operable to provide a first passage joining the primary inlet and the first chamber outlet, and a second passage joining the primary inlet and said second chamber inlet.
  • said second valve is operable to provide a third passage, the third passage connecting the injection port with said chamber.
  • said second valve is operable to provide a fourth passage, said fourth passage providing a vent connecting the chamber atmosphere.
  • said second and third passages communicate with said chamber via said second chamber inlet.
  • said second valve includes a movable valve member eatable in a plurality of positions, the positions corresponding to said passages.
  • said movable valve member is movable angularly about said axis to said positions.
  • said movable valve member is fixed to said chamber, so that movement of the movable valve member between its said positions is achieved by a user gripping said chamber causing angular movement of said chamber.
  • the second valve is operable to simultaneously provide the first, third and fourth passages.
  • the second valve is operable to simultaneously provide the second, third and fourth passages.
  • the second valve is operable to simultaneously provide the third and fourth passages.
  • the second valve is operable to simultaneously provide the second and third passages.
  • the second valve is operable to provide only the third passage.
  • said second valve is operable to vary flow rate through the first passage between a maximum flow rate and zero flow rate
  • the first, second, third and fourth passages are generally parallel to said axis.
  • the burette further includes a base, with the body and movable valve member being attached with the movable valve member being movable angularly relative to the base about said axis.
  • the second valve member is fixed to the body so that a user grips the body and moves the body relative to the base to move the second valve member relative to the base.
  • the movable valve member is of a disc configuration.
  • the burette further includes a seal located between the movable valve member and the base, with said seal having a plurality of passages aiding to provide the first, second and fourth passages.
  • the seal and movable valve member provide a valve assembly
  • said base is a cap
  • said cap engages said body so that the seal and movable valve member are located between the base and body.
  • the first, second and fourth passages are generally parallel to said axis.
  • Figure 1 is a schematic isometric view of a burette
  • Figure 2 is a schematic isometric view of the end portion of the burette of Figure 1 :
  • Figure 3 is a schematic parts exploded isometric view of the end portion of Figure 2;
  • Figure 4 is a further parts exploded isometric view of the end portion of Figure 2;
  • Figure 5 is a schematic illustration of portion of the burette of Figure 1;
  • Figure 6 is a schematic parts exploded isometric view of the portion of Figure 5;
  • Figure 7 is a schematic parts exploded isometric view of a modification of the portion of Figure 6;
  • Figures 8 to 12 are schematic illustrations of the portion of Figure 7 in various configurations.
  • Figure 13 is a schematic sectioned side elevation of the end portion of the burette as shown in Figure 2.
  • a medical burette 10 to provide for the delivery of intravenous liquids to a patient.
  • the burette 10 would be connected via a tube 11 to a supply (bag) of liquid.
  • a tube 12 would then extend from the burette 10 to the patient.
  • the burette 10 includes an elongated hollow (generally cylindrical) body 13 enclosing a chamber 14 that is to contain a liquid or liquids to be delivered intravenously.
  • an end assembly 15 Secured to the upper end of the body 13 is an end assembly 15.
  • the end assembly 15 is a cap assembly.
  • the lower end of the body 13 provides a chamber outlet 16 for the chamber 14.
  • the assembly 15 provides the burette 10 with a primary inlet 17 to which the tube 11 is connected.
  • the assembly 15 also provides a port 18 via which a further liquid, such as a medication, may be introduced to the chamber 14.
  • the port 18 may be an injection port.
  • a float 20 Located in the chamber 14 is a float 20.
  • the float 20 uses a guide member 59 and engagement in the outlet 16 to be guided thereby in its vertical movement.
  • the float 20 is guided to engage the lower end of the tube 19 to close the tube 19, when the depth of liquid in the chamber 14 exceeds a predetermined level (depth).
  • the guide member 59 holds the lower end of the tube 19 in position, with the float 20 having fingers 60 slidably engaging the lower end portion of the tube 19 so as to be guided thereby. If liquid in the chamber 14 is below a predetermined level, the float 20 allows liquid to exit the lower end of the tube 19. Operation of the float 20 and tube 19 can be as described in the above Australian patent 2006301931. That is, the tube 19 and float 20 operate as a float valve.
  • the assembly 15 includes a base that is preferably a cap 21 having a transverse wall 22 and a skirt 23.
  • the skirt 23 incorporates a plurality of resiliently deformable fingers 24 having internal barbs 25 that snap engage over an annular ridge 51 adjacent the upper end of the body 13 to fix the cap assembly 15 to the body 13.
  • valve assembly 26 Located in the cap 21 is a valve assembly 26 including a seal 27 of a disk .
  • the movable valve member 28 includes an annular flange 29 fixed (by adhesive or welding) to the upper edge of the body 13 so as to be secured thereto.
  • the movable valve member 28 is of a disk configuration and is moved relative to the seal 27 and the cap 21 via a user gripping the body 13 and causing angular movement of the body 13 about the upright longitudinal axis 30 of the burette 10 and the body 13 (and therefore chamber 14).
  • the seal 27 sealingly connects the underside of the wall 22 with the movable valve member 28.
  • the seal 28 is also provided with a plurality of passages to provide for the flow of liquid to pass the seal 27.
  • the wall 22 is also provided with a radially extending passage (slot) 33 that communicates with the primary 17.
  • the port 18 communicates with a passage 32 in the wall 22.
  • the seal 27 is formed of resilient material such as synthetic or rubber or a plastics material, and acts as a seal between the cap 21 and the valve member 28. However the seal 27 is provided with a plurality of passages including a plurality of passages 31, and passages 34, 35 and 36.
  • the movable valve member 28 includes a wall 37 transverse of the axis 30 through which there extends a plurality of passages 38, and passages 40, 41 and 42. In addition there are passages (slots) 43 and 44 as well as an angular passage (slot) 45 communicating with the passage 44.
  • the passage 45 extends angularly about the longitudinal axis 30 at a substantially constant radius.
  • the passages 33, 43 and 44 extend radially relative to the axis 30.
  • the movable valve member 28 also includes the abovementioned annular ridge 51 over which the barbs engage.
  • the seal 27 also has a peripheral slot 52 that engages a projection 58 that extends inwardly relative to the wall 22 to retain the seal 27 stationary with respect to the cap 21.
  • valve assembly 26 can be configured to provide a plurality of passages by moving the valve member 28 angularly about the axis 30 relative to the cap 21 and the seal 27.
  • the passages include a first passage 46 ( Figure 12).
  • the first passage 46 provides for communication between the primary inlet 17 and the tube 19 to deliver fluid to the interior 14, with the delivery being governed by operation of the float valve, that is the float 20.
  • This passage 46 includes passages 33, 35, 41, 44 and 45.
  • Flow rates through the passage 46 can also be varied. This is achieved by selecting the position at which the passage 35 communicates with the passage 45. If the communication is most remote from the passage 44, maximum resistance is provided. If however the passage 35 communicates close to the passage 44, then minimum resistance is provided thereby enhancing flow.
  • the second passage 47 provides for communication between the primary inlet 17 and the chamber 14 and includes passages 33, 35, 43 and 41 ( Figure 1 1).
  • the second passage can also be provided passages 33, 35 and 42 ( Figure 9).
  • the third passage 48 provides a permanent communication between the port 18 and the chamber 14.
  • the passage 48 includes passages 34 and 56 (Figure 8), passages 34 and 57 ( Figure 9), passages 34 and 40 (Figure 10), passages 34 and 41 ( Figure 11) and passages 34 and 38 (Figure 12).
  • the fourth passage 49 is a vent passage and uses one of the passages 50, one of the passages 31 and the passage 39 ( Figure 12), one of the passages 50, the passage 55 and 39 ( Figure 11), and one of the passages 50, the passage 36 and the passage 39 ( Figure 10).
  • the valve assembly 26 can be configured by operation of a health professional to provide a variety of functions, with operation of the burette 10 being reasonably simple.
  • the health professional merely grips the body 13 and moves it angularly relative to cap 21 about the longitudinal axis 30. This angular movement causes the valve member 28 to move relative to the valve member 27 and the cap 21.
  • valve 26 provides the first, third and fourth passages 46, 48, 49 and is illustrated in Figure 12.
  • intravenous liquid is delivered via the primary inlet 17 and delivered to the chamber 14 via the tube 19 and by operation of the float 20.
  • the vent passage 49 is open and the health professional may deliver medication to the port 18 for delivery to the chamber 1 * 4 via the passage 48.
  • the passage 47 is not operative.
  • the flow rate via passage 46 can also be varied to a "medium" flow rate.
  • valve 26 provides the vent open as well as the second passage 47 and the third passage 48 together with the fourth passage 49.
  • medication delivered by the port 18 is flushed through the valve assembly 26 via the intravenous fluid delivered to the primary inlet 17.
  • This configuration also provides for filling of the chamber 14.
  • This configuration is illustrated in Figure 11. The passage 46 is not operative.
  • the positions of the movable valve member 28 to provide the above functions is identified by a plurality of recesses 53, in the annular ridge 51 , that snap engage with a ridge 54 of the cap 15.
  • Each recess 53 corresponds to one of the above functions.

Landscapes

  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

L'invention concerne une burette (10) pour l'administration de liquides intraveineux à un patient. La burette (10) comprend un corps creux (13) qui est détaché d'un élément de valve mobile (28), un utilisateur saisissant le corps (13) de façon à déplacer l'élément de valve (28) pour assurer les diverses fonctions de la burette (10).
PCT/AU2013/000806 2012-09-05 2013-07-22 Burette WO2014036589A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2012903870 2012-09-05
AU2012903870A AU2012903870A0 (en) 2012-09-05 A burette

Publications (1)

Publication Number Publication Date
WO2014036589A1 true WO2014036589A1 (fr) 2014-03-13

Family

ID=50236365

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2013/000806 WO2014036589A1 (fr) 2012-09-05 2013-07-22 Burette

Country Status (1)

Country Link
WO (1) WO2014036589A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107656010A (zh) * 2017-10-27 2018-02-02 张凌睿 一种实验用滴管
CN107970499A (zh) * 2016-10-21 2018-05-01 上海康德莱企业发展集团股份有限公司 一种偏心自排气输液器

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3625211A (en) * 1969-06-06 1971-12-07 Cutter Lab Failsafe apparatus for administering a parenteral solution
GB1583551A (en) * 1976-05-17 1981-01-28 Ici Ltd Control valves
GB2147087A (en) * 1983-09-10 1985-05-01 Smith & Nephew Ass Parenteral fluid administration set
GB2228063A (en) * 1989-01-24 1990-08-15 Young J Flow control valve
US5885532A (en) * 1994-09-26 1999-03-23 Noonbeach Pty Ltd. Burette apparatus
US20020065491A1 (en) * 2000-11-28 2002-05-30 Industrie Borla Spa Buret with foot valve for medical infusion equipment
WO2007041787A1 (fr) * 2005-10-13 2007-04-19 Analytica Limited Burette
WO2009152555A1 (fr) * 2008-06-20 2009-12-23 Analytica Limited Orifice d’injection rinçable

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3625211A (en) * 1969-06-06 1971-12-07 Cutter Lab Failsafe apparatus for administering a parenteral solution
GB1583551A (en) * 1976-05-17 1981-01-28 Ici Ltd Control valves
GB2147087A (en) * 1983-09-10 1985-05-01 Smith & Nephew Ass Parenteral fluid administration set
GB2228063A (en) * 1989-01-24 1990-08-15 Young J Flow control valve
US5885532A (en) * 1994-09-26 1999-03-23 Noonbeach Pty Ltd. Burette apparatus
US20020065491A1 (en) * 2000-11-28 2002-05-30 Industrie Borla Spa Buret with foot valve for medical infusion equipment
WO2007041787A1 (fr) * 2005-10-13 2007-04-19 Analytica Limited Burette
WO2009152555A1 (fr) * 2008-06-20 2009-12-23 Analytica Limited Orifice d’injection rinçable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107970499A (zh) * 2016-10-21 2018-05-01 上海康德莱企业发展集团股份有限公司 一种偏心自排气输液器
CN107970499B (zh) * 2016-10-21 2023-11-21 上海康德莱企业发展集团股份有限公司 一种偏心自排气输液器
CN107656010A (zh) * 2017-10-27 2018-02-02 张凌睿 一种实验用滴管

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