CA2354130C - Fluid flow rate switching device - Google Patents

Fluid flow rate switching device Download PDF

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Publication number
CA2354130C
CA2354130C CA002354130A CA2354130A CA2354130C CA 2354130 C CA2354130 C CA 2354130C CA 002354130 A CA002354130 A CA 002354130A CA 2354130 A CA2354130 A CA 2354130A CA 2354130 C CA2354130 C CA 2354130C
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CA
Canada
Prior art keywords
valve
switch
fluid
housing
passages
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 - Fee Related
Application number
CA002354130A
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French (fr)
Other versions
CA2354130A1 (en
Inventor
Mark E. Williamson
Scott Ariagno
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.)
Baxter International Inc
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Baxter International Inc
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Filing date
Publication date
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Publication of CA2354130A1 publication Critical patent/CA2354130A1/en
Application granted granted Critical
Publication of CA2354130C publication Critical patent/CA2354130C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168Means 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
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168Means 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
    • A61M5/16877Adjusting flow; Devices for setting a flow rate
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/141Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor with capillaries for restricting fluid flow
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M2209/00Ancillary equipment
    • A61M2209/04Tools for specific apparatus
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/86493Multi-way valve unit
    • Y10T137/86718Dividing into parallel flow paths with recombining
    • Y10T137/86734With metering feature
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/86493Multi-way valve unit
    • Y10T137/86718Dividing into parallel flow paths with recombining
    • Y10T137/86743Rotary
    • Y10T137/86751Plug

Abstract

A fluid flow rate switching device providing a plurality of precise user selectable flow rates. Generally, the device includes a housing having a port and a plurality of passages. Respectively disposed in each of the passages is a rigid capillary tube for regulating the flow rate of a therapeutic fluid through the passages. Further, a valve is rotatably connected to the housing for operably connecting and disconnecting the port from one or more of the passages.

Description

WO 01/28610 PCT/utioo/25013 FLUID FLOW RATE SWITCIIING nEViCE

DESCRIP7'ION
Technical Field The present invention generally relates to devices for controlling flow rates of (luids, and in particular to providing a plurality of precise iiser selectable flow rates in rnedical fluid delivery systems.
Background Art In many fluid delivery systenis, it is important to carefully control the fluid flow rates.
With respect to systenis intended to he used in the intravenous administration of fluids, the precise control of fluid flow rates is usually a critical part of the therapy being provided to the patent. In the medical field, then, accuracy is an iinportant feature of a flow control system.
Furthermore, the intravenous adniinistration of fluids at uncontrolled high fluid flow rates cari be liarniful to the patient.
Another desirable feature of a flow control system is consistency over time.
In the medical field, it is impractical to expect a niedical attendant to be present to nionitor the fluid flow rate during the entire treatment session. A flow rate control system must therefore be capable of maintaining a stable flow rate while being unattended for relatively long periods of time. Also in the niedical field, as well as other environnlents, yet another desirable feature for a flow control systeni is simplicity of operation to minimize operator error.
In sonie drug administration systems, a valve is used in conibination with a pair of plastic flexible tubes to create a fluid rate switching device. However, the use of plastic flexible tubing fails to provide hi,li accuracy in regulating the flow rate of a fluid. Also, the length of plastic tubing required to achieve a desired flow rate can change as a result of inconsistencies in the manufacturing process of plastic tubing. Thus, special steps must be taken if plastic tubing is to be used in regulating a fluid flow rate.

Hence, prior to the present invention, a need existed for a relatively sinall device havin'; a user selectable flow rate control that is precise and stable.
Summary of the Invention Generally, the switch of the present invention includes a housing having a port and a plurality of passages. Respectively disposed in each of the passages is a rigid capillary tube for regulating the flow rate of a therapeutic fluid through the passages.
Further, a valve is rotatably connected to the housing for operably connecting and disconnecting the port from one or more of the passages.
According to one aspect of the present invention, there is provided a switch for selecting a flow rate of a therapeutic fluid comprising:
a housing having a port and a plurality of passages;
a plurality of rigid capillary tubes that regulate the flow rate of the therapeutic fluid, each of the tubes respectively disposed in one of the passages; and a valve operably connected to the housing, the valve having a fluid flow path and moveable to selectively connect and disconnect the port from one or more of the passages, wherein the flow rate of the therapeutic fluid is sequentially increased or decreased by at least three incremental values as the valve is rotated in a counter-clockwise or clockwise direction.
Other advantages and features of the present invention will be apparent from the following description of a specific embodiment illustrated in the accompanying drawings.

2a Brief Description of Drawings FIGURE 1 is an enlarged perspective assembly view of a switching device and a removable handle in accordance with the present invention with the switching device having a housing and a switching valve, the housing including a cover, and insert, and an end cap;
FIGURE 2 is a side view of the switching device of FIGURE 1;
FIGURE 3 is a top perspective view of the cover to the housing depicted in FIGURE 1;
FIGURE 4 is a bottom perspective view of the cover to the housing depicted in FIGURE 1;
FIGURE 5 is an elevated view of the inner surface of the end wall to the housing cover depicted in FIGURES 3 and 4;
FIGURE 6 is a perspective view of the insert to the housing depicted in FIGURE
1;
FIGURE 7 is a cross-sectional view of the insert depicted in FIGURE 6;
FIGURE 8 is a top view of the insert depicted in FIGURE 6;
FIGURE 9 is a bottom view of the insert depicted in FIGURE 6;
FIGURE 10 is a perspective view of the end cap to the housing depicted in FIGURE 1;
FIGURE 11 is an enlarged top view of the valve within the switching device depicted in FIGURE 1;
FIGURE 12 is a cross-sectional view of the valve of FIGURE 11 taken along plane 12-12;
FIGURE 13 is a top perspective view of the rate switching tool or handle of FIGURE 1 for removably attaching to the valve of FIGURE 11;
FIGURE 14 is a bottoin perspective view of tiie liaiidle depicted in FIGURE
13;
FIGURE 15 is a cross-sectional view of the switching device taken along plane of FIGURE 2 and with the valve turned to the off position;

FIGURE 16 is similar to FIGURE 15, except with the valve turned to enable a single serial flow path through the switching device;

FIGURE 17 is siniilar to FIGURE 16, except with the valve turned to enable an alternative single serial flow path through the switching device;
FIGURE 18 is similar to FIGURES 16 and 17, except with the valve turned to enable a dual parallel flow path through the switching device;
FIGURE 19 is an elevated view of the switching device of FIGURE 1 operably coupled to a small volume elastomeric infusion pump;

FIGURE 20 is an elevated view of the switching device of FIGURE l operably coupled to a large volume elastomeric infusion pump; and, FIGURE 21 is an elevated view of the switching device of FIGURE I operably coupled to an infusor.

Detailed Description While this invention is susceptible of enibodiments in many different forms.
there is shown in the drawings and will herein be described in detail a preferred embodiment of the invention. The present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the broad aspect of the invention to the embodiment illustrated.
Referring now to the drawings, and particularly to FIGURES 1 and 2, a multi rate switching device 10 is disclosed having a housing 12, a valve 14, and a pair of flow restrictors 16,17 (FIGURES 15-18). The housing 12 includes an outer cover member 18, an insert 20, and an end cap 22. These components are preferably made of polycarbonate and attached together by ultrasonic welding. However, if desired, the components can be fabricated from other rigid polymeric materials such as cyclic olefin containing polymers, bridged polycyclic hydrocarbon containing polymers, polyesters, polyamides, ABS, polyurethane and the like and wc) u1n861o PCT/US0o/25013 can be attached together by adhesive bonding, solvent bonding, radio frequency bonding, snap-fits, or other suitable joining methods.
Ttirning to FIGURES 3, 4 and 5, the outer cover 18 includes an end wall 24 and a continuous perimeter wall 26 integrally connected together. The end wall 24 has an inner surface 28 (FIGURES 4 and 5) and a generally oval shaped perinieter. The perimeter wall 26 extends from the perimeter of the end wall 24 and defines an opening 30 for receiving the insert 20.
As shown in FIGURE 5, a pair of C-shaped projections 32,33 are integrally attached and extend from the inner surface 28 of the cover member end wall 24. The C-shaped projections 32,33 are symmetrically positioned about the lateral axis 34 of the end wall 24.
Preferably, the C-shaped projections 32 and 33 have openings 36 and 37, respectively, that face each other.
Extendin~; through each opening 36,37 of the C-shaped projections 32 and 33 is a I'D
longitudinal channel 38 and 39, respectively. The channels 38,39 are formed in the surface 28 of the end wall 24 and are symntetrically positioned about the end wall lateral axis 34. Each channel 38 and 39 originates generally at the midpoint of its associated C-shaped projection 32 and 33, respectively, and extends alonc, the longitudinal axis of the end wall 24. The channels 3 8,39 terminate short of reaching the lateral axis 34 of the end wall 24.
Extending from and integrally attached to the inner surface 28 of the end wall 24 are a pair of continuous walls 40,41 that surround each C-stiaped projection 32,33 and associated channel 38, 39. The continuous walls 40,41 are symmetrically positioned about the lateral axis 34 of the end wall 24 with each wall having a generally teardrop shaped perimeter. The walls 40, 41 facilitate attaching the cover 18 to the insert 20 to define two separate fluid paths as described in detail further herein. Preferably, the apex 42 of the teardrop shaped perimeters of =
the two walls 40,41 face each other. Bordering the inner perimeter of each wall 40 and 41 is a continuous groove 44 and 45, respectively, formed within the inner surface 28 of the end wall 24.
As previously indicated, extending, from the perimeter of the outer cover end wall 24 is a continuous perimeter wall 26 that is generally oval in cross section and defines an open W() 01/28610 I'CT/Uti00/25013 chamber 46 for receiving the tiousing insert 20. Tlte perimeter wall 26 includes opposing outer side surfaces 48,49 witlt coaxially aligned annular apertures 50 and 51 passing through the side surfaces 48 and 49, respectively. Outer side surface 48 also includes a ring shaped outer ridge 52 in coaxial alignment with aperture 50. Preferably, outer side surface 49 is generally planar 5 to enhance comfort when placing the side surface against the skin of a patient. Likewise, the portions of tiie perimeter -vvall 26 between side surfaces 48 and 49 are smooth.
Turning to FIGURES 6-9, the insert 20 of the housing 12 includes a flow block 54 and a tube member 56 integrally attached together. The flow block 54 includes an inner plate member 58 and an outer plate member 59. Preferably, the plate members 58,59 are in coplanar spaced relationship to each other.
As shown in FIGURE 7, formed within the flow block 54 and extending through the inner plate member 58 and the outer plate member 59 are a pair of stepped outer bores 60,61 and a pair of inner bores 62,63. The outer bores 60,61 are in parallel spaced relationship to each other and perpendicular to the plate members 58,59. Each outer bore 60,61 includes a cylindrical passage 64, a cylindrical restrictor containntent chamber 66, and a cylindrical o-rin';
containment chamber 68. The cylindrical passage 64 of each outer bore 60,61 is in fluid communication with containment chamber 66 and has an openin, 70 in the outer plate nieniber 59. The containment chamber 66 of each bore 60,61 is in fluid communication with the o-rin(y containment chamber 68 and has aii inner diameter that is larger than the inner diameter of the cylindrical passage 64. The o-ring chamber 68 of each bore 60,61 has an opening 72 in the inner plate meniber 58 and a larger inner diatneter than the inner dianieter of the restrictor containment chamber 66.
The inner bores 62,63 within the flow block 54 are in parallel spaced relationship to each other and the outer bores 60,61. Also, the inner bores 62,63 are situated between the outer bores 60,61. The inner bores 62,63 extend through the inner plate member 58 and to the inner surface 74 of a cylindrical control valve receiving bore 76 situated between the inner plate member 58 and the outer plate member 59. Accordingly, the inner bores 62 and 63 are in fluid communication with ports 75 and 77, respectively, on the inner surface 74 of valve receiving bore 76.

VVC) 01/28610 PCT/US00/25013 Preferably, the longitudinal axis of the control valve receiving bore 76 is in spaced perpendicular relationship to the longitudinal axises of the outer bores 60,61 and the inncr bores 62,63. Moreover, a retaining ring 78 radially inwardly projects about one opening ofthe control valve receiving bore 76.
Tube member 56 of the liousing insert 20 has a distal port or opening 80 and a cylindrical bore 82 in coaxial alignment and fluid comniunication with a junction bore 84 extending into the flow block 54. The junction bore 84 also is in longitudinal coaxial alignment with inner bore 63 and in fluid communication with the control valve receiving bore 76 via port 79.
As shown in FIGURE 8, formed in the outer surface 86 of the housing insert inner plate member 58 are a pair of longitudinal cliannels 88,89 symmetrically positioned about the lateral axis of the plate member. Each channel 88,89 is in fluid communication and extends between one of the o-rin; chambers 68 and one of the inner bores 62,63 in the flow block 54. When the cover member 18 is attaclied to the insert 20, channels 38 (FIGURE 5) and 88 define a generally cylindrical passage within the housing 12 along with channels 39 (FIGURE 5) and 89.
A pair of continuous walls 90 surround the channel 88,89, o-ring bore openiny, 72 and inner bore opening on both sides of the inner plate member 58 about the lateral axis. The walls 90 are integrally attached and perpendicularly extend from the surface 86 of the inner plate member 58. The walls 90 are dimensioned to correspond, align, and at least be partially received with the continuous grooves 44,45 formed within the inner surface 28 of the housing outer cover end wall 24. This results in a tortuous path, or flashtrap, for preventing debris particles from being deposited within the device fluid paths during ultrasonic welding of the walls 40,41 of the housing end wall 24 to the inner plate member 58 of the housing insert 20 As shown in FIGURE 9, the outer plate member 59 of the flow block 54 includes an outer surface 92 having a channel 94 in fluid communication and extending between the outer bores 64. The channel 94 includes a curved portion 96 wherein the channel extends around tube member 56.
Referring to FIGURE 10, the end cap 22 of the housing 12 includes a plate like cover member 98 and a tube member 100 integrally attached together. The cover member attaches to the outer plate member 59 on the housing insert 20. The cover member 98 includes an inner surface 102 and an opposite outer surface 104. The inner surface 102 includes a channel 106 that is symmetrical to the channel 94 formed in the outer surface 92 of the flow block outer plate member 59. Accordingly, with the end cap 22 attached to the flow block 54, the two channels 106 and 94 define a single tubular fluid passageway 108 (FIGURES 15-1 R) between the outer bores 60 and 61.
Preferably, the inner surface 102 of the cover member 98 includes a outer perimeter weld ring 101 and an inner weld ring 103 about an aperture 114. The weld rings 101 and 102 are received within corresponding channels 105 and 107 (FIGURE 9), respectively, formed in the outer surface 92 of the housing insert outer plate member 59. Thus, during ultrasonic welding of the rings 101,102 of the cover member 98 to the outer plate member 59, a flashtrap similar to that used in attaching the housing cover 18 to the housing insert 20 is provided for preventing debris particles from entering the fluid paths of the device.
Turnin- to FIGURE 15, the tube member 100 of the end cap 22 includes a cylindrical bore 112 extendin~, through cover member 98 and having a distal port or opening l 10. The bore 112 is in fluid communication with the channel 106 in the inner surface 102 of the cover member 98, and thus passageway 108.
The cover niember 98 of the end cap 22 also iiiciudes aperture 114 for receivini, the tube member 56 extendin- from the flow block 54 of the housing insert 20.
Accordingly, the housing insert tube member 56 extends through the aperture 114 when the cover member 98 is attached to the housing insert 20.
Referring to FIGURES 1, 11 and 12, the valve 14 of the switching device 10 includes a cylindrical hub member 116 rotatably mounted within the valve receiving bore 76 (FIGURE 7) of the insert member 20 and the apertures 50,51 (FIGURES 3 and 4) of the housing outer cover member 18. Preferably, the valve 14 consists of hi:h-density polyethylene.
Also, a lubricant or grease such as a high viscositv silicon oil is used to seal and reduce friction between the valve hub 116 and housiniz, insert member bore 76.
As shown in FIGURES I 1 and 12, the hub 116 includes a bore 118 containing a tubular fluid path connecting joint or T joint fitting 120 integrally attached to the hub. Turning to FIGURE 16, the outer surface of the hub member 116 includes three valve ports 122, 123 and 124 in fluid communication with the TJoint fitting 120. Preferably, relative to the center junction 125 of the T joint fitting 120, port 122 is situated ninety degrees from port 123 and one hundred eighty degrees froni port 124.
Turning back to FIGLTRES 11 and 12, radially outwardly extending from one end of the hub member 116 is a flange member 126 partially received within the ring shaped outer ridge 52 (FIGURES 1-3) of the switching device 10. The recessing of the flange 126 into the housing 12 is intended to prevent a patient from tampering with the device by attempting to manually rotate the valve 14.
Formed in the outer perimeter of the flange member 126 is a flow rate indicator window or notch 130 and a pair of handle engagement notches 132,133. The indicator window 130 allows a user to view a rate label 134 (FIGURE 1) printed on the housing 12 and corresponding to a user selected flow rate. Accordingly, the valve flange member hides all other rate labels except for the currently selected rate. As the user rotates the valve 14 to change the rate, the window 130 rotates and exposes only the selected rate.
Alternatively, instead of exposing the selected rate label through a window in the valve flange, a pointer could be used to identify the selected rate.
Preferably, relative to the longitudinal axis of the hub member 116, the center of the indicator window 130 is between valve ports 122 and 123 (FIGLIRE 16). Further, engagement notches 132 and 133 are centered about one hundred and thirty five degrees from both sides of the indicator window 130.
As shown in FIGURE 12, longitudinall_y extending from the valve hub member 116 opposite the flange 126 are a group of prongs 128. Both the flange member 126 and the prongs 128 are integrally attached to the hub member 116. The distal ends of the prongs 128 are radially outwardly lipped. The prongs 128 secure the valve 14 to the housing 12 by enaaaino the retaininc, ring 78 (FIGURE 7) within the control valve receiving bore 76.

WO 01n8610 PCT/USOO/25013 However, the valve 14 is allowed to rotate within the control valve receiving bore 78 for selecting a flow rate as described in detail further herein.
Turning to FIGURES 1, 13 and 14, manually attacliable to the valve 14 is a rate switching tool or iiandle 136 for providing leverage to manually rotate the vaive. As explained in detail further herein, rotation of the valve 14 results in a selection of a flow rate path through the switch 10. Preferably, the handle 136 is needed to rotate the valve 14.
Accordingly, the handle 136 can be removed and kept by a physician or other health care personnel to discourage patients from rotating the valve without perrnission.
The handte 136 includes an indicator side 138, an opposite valve engagement side 140, and a tube attachment crook 142. The engagement side 140 ot'the handle 136 includes a cylindrical registration hub 144 receivable within the bore 1 18 of the valve hub 116 about flange 126. The engagement side 140 of the handle 136 also includes a pair of spaced coupiing pins 146 and 147 that are received within the notches 132 and 133, respectively, when the handle is attached to the valve 14. Moreover, the indicator side 138 of the handle can include indicia 148 for pointing to the valve window i 30 when the handle is attached to the valve 14. Further, the crook 142 in the liandle 142 defines an opening 150 for receivin", and thus clipping, the handle to tubing or the like as sliown in FIGURES 19-21.
Turning to FIGURE 15, and referring to the housing insert 20, received within the containment chamber 66 of each outer bore 60 and 61 is a capillary tube or restrictor 16 and 17, respectively. Each restrictor 16 and17 has a calibrated longitudinal axial open bore 151 and 152, respectively, for regulating the flow rate of a fluid. Preferably, the restrictors 16,17 have substantiallv the same ien,th and consist of microbored glass tubes with restrictor 17 allowing for twice the floxv rate of restrictor 16. However, in alternative embodiments, restrictor 17 can have another flow rate other than twice that of restrictor 16.

Preferably, the restrictors 16,17 are located on opposite sides of the valve 14 rather than being in-line with each other to reduce the overall length of the device.
However, if desired, the restrictors 16,17 can be mounted in other configurations with respect to each other.
Also located within the containment chamber 66 of each outer bore 60,61 is a spacer o-rin~, 153 proximate to each passage 64 within the flow block 54. The o-rin,s 153 provide an 10 1'CT/US00/25013 adjustable cushion to account for tolerance stackup and remove air space between the molded housing insert 20 and the restrictors 16,17.
Received within the o-ring containment chamber 68 of each outer bore 60 and 61 is a sealing o-ring 154. The o-ringgs 154 are attached to the outer surfaces of the restrictors 16,17 to 5 form liquid tight seals. Further, the C-shaped projections 32,33 of the housing cover member 18 compress the o-rings 154 against the flow block 54 proximate to the containment chambers 66. Thus, liquid tight seals are provided between the inner walls of each o-ring containment chamber 68 and the o-rings 154. Nevertheless, a flow path is provided between outer bore 16 and inner bore 62 via channel 38 in the end wall 24 of the housing outer cover member 18.
10 Likewise, a flow path is provided between outer bore 17 and inner bore 63 via channel 39 in the end wall 24 of the housing outer cover member 18.
As shown in FIGURES 15-18, rotation of the valve 14 results in turning off or selecting a flow path between the ports 80,1 10 of the rate switcliing device 10 that correspond to a desired fluid flow rate. Manual rotation of the valve 14 to the position shown in FIGURE 15 results in the valve blockin-, and thus turning off, all flow paths between the ports 80,110 of the rate switchim, device 10.
Manual rotation of the valve 14 to the position shown in FIGURE 16 results in a single serial flow path 156 between the ports 80,110 of the rate switching device 10.
The flow path 156 extends from port i 10 to port 80 via tube member bore 112, passageway 108, bore 151 of restrictor 16, channel 38, inner bore 62, T-joint 120, flow block bore 84, and tube member bore 82.
Manual rotation of the valve 14 to the position shown in FIGURE 17 results in another single serial flow path 158 between the ports 80,1 10 of the rate switching device 10. The flow path 158 extends from port 1 10 to port 80 via tube meniber bore 112, passageway 108, bore 152 of restrictor 17, channel 39, inner bore 63, T-joint 120, flow block bore 84, and tube member bore 82.
Manual rotation of the valve 14 to the position shown in FIGURE 18 results in a parallel flow path 160 between the ports 80,110 of the rate switching device 10. The parallel flow path 160 consists both flow path 156 and 158. Accordingly, fluid flows from port l 10 to wc~ 0 11286 10 PcTiusoa/25013 Il poi-t 80 via tube nteniber bore 112, passageway 108, borc 152 of restrictor 17, channel 39, inner bore 63, T-joint 120, flow block bore 84, and tube member bore 82. Fluid also flows from port l 10 to port 80 via tube inember bore 112, passageway 108, bore 151 of restrictor 10, channel 38, inner bore 62, T-joint 120, flow block bore 84, and tube member bore 82.

As shown in FIGURES 15-18, the T-joint fitting 120 of the valve 14 intercepts the bores 62, 63, 84 of the flow block 20 at an offiset or angle of about 135 degrees when makin~.; a fluid flow connection. This Y-configuration greatly reduces the size of the device 10 wherein, the smaller the device, the more comfortable it is for a patient to wear, and the Y-confi-uration also provides for adjustments of the fluid flow rate in a logical incremental ascending or descending order. For instance, if the restrictor 16 in flow patli 156 provides a I ml/hour flow rate, and the restrictor 17 in flow path 158 provides a 2 ml/hour flow rate, then the resulting rates that can be selected usin, device 10 are, in order, 1 ml/hotir (FIGURE
16), 2 nil/hour (FIGURE 17), 3 mI/hour (FIGURE 18), and 0 ml/hour (FIGURE 15).
Preferably, the flow paths and corresponding flow rates through the device 10 are selected when the valve 14 is rotated by an predetermined increniental aniount. For instance, as shown in FIGURE 15-18. Rotating the valve 10 ninety (90) degrees results in turning ofl' the device 10 or tiie selection of a flow path and corresponding flow rate throu"h the device 10.
In particular, counterclockwise rotation of the valve ninety degrees from tiie position shown in FIGURE 15 results in the selection of the flow path and corresponding, flow rate through the device 10 shown in FIGURE 16. Likewise, counterclockwise rotation of the valve ninety degrees from the position shown in FIGURE 16 results in the selection of the flow patli and corresponding flow rate throuah the device 10 shown in FIGURE 17. Further, counterclockwise rotation of the valve ninety degrees from the position shown in FIGURE 17 results in the selection of the flow path and corresponding flow rate through the device 10 shown in FIGURE 18. Preferably, the flow rate through the device 10 incrementally increases as the valve 14 is rotated with the handle 136 in a counterclockwise direction. Likewise, flow rate through the device 10 incrementally decreases as the valve 14 is rotated with the handle 136 in a clockwise direction. Thus, the device 10 operates in a logical manner similar to regulating the flow rate of liquid with most faucets by turning the faucet handle clockwise to decrease the flow rate of the liquid and turning the facet handle counterclockwise to increase the flow rate of the liquid.

In an embodiment depicted in FIGURES 19, 20, and 21, the switching device 10 can be operably connected to various positive pressure sources including, among others, elastomeric infusion pumps 162, 163, and 164, respectively, via flexible tubing 166. Such pumps are well know in the art and can include that disclosed in U.S. Patent No. 5,263,935 to Hessel. Preferably, the restrictors 16,17 within the switching device 10 are matched to the amount of fluid pressure produced by a pressure source for providing the desired flow rates through the device.

Pumps 162, 163, and 164 include an elastomeric bladder 168 disposed with a generally tubular outer casing 170. The bladder 168 can be filled with a pharmaceutically active material. The fluid pressure within the fully extended bladder results in the fluid flow from the pump to the switching device via tubing 166. Preferably, the tubing 166 is connected by solvent bonding to tube 100 of the switching device 10 so fluid flows from the pump, through the restrictors 16,17, and then through the valve 14. Further, tube 56 is attached by solvent bonding to flexible tubing 172 having a connector 174 attached opposite the switching device 10. The connector 174 provides for operably connecting the switching device 10 to I.V. tubing or the like attached to the patient.
As will be appreciated by those having skill in the art, the switching device 10 can also be operably connected to other types of positive pressure sources including electro-mechanical, chemical, and gravitational.

While the specific embodiments have been illustrated and described, numerous modifications come to mind without significantly departing from the spirit of the invention and the scope of protection is only limited by the scope of the accompanying Claims.

Claims (16)

What is claimed is:
1. A switch for selecting a flow rate of a therapeutic fluid comprising:
a housing having a port and a plurality of passages;
a plurality of rigid capillary tubes that regulate the flow rate of the therapeutic fluid, each of the tubes respectively disposed in one of the passages; and a valve operably connected to the housing, the valve having a fluid flow path and moveable to selectively connect and disconnect the port from one or more of the passages, wherein the flow rate of the therapeutic fluid is sequentially increased or decreased by at least three incremental values as the valve is rotated in a counterclockwise or clockwise direction.
2. The switch of Claim 1 wherein the flow rate of the therapeutic fluid is incrementally increased as the valve is sequentially rotated in at least three serial steps of ninety degrees.
3. The switch of Claim 1 wherein said valve is moveable to a serial flow position to operably connect one of the passages to the port, the valve moveable to a parallel flow position to operably connect at least two of the passages to the port, and the valve moveable to an off position to operably disconnect the port from the passages.
4. The switch of Claim 1 wherein said housing includes a cover member ultrasonically welded to an insert containing the capillary tubes, and the cover member and the insert defining a flashtrap to prevent debris particles from coming into contact with the therapeutic fluid.
5. The switch of Claim 1 wherein said housing includes a bore that receives the valve.
6. The switch of Claim 1 wherein said valve includes a flange attached to a hub member.
7. The switch of Claim 6 wherein said flange includes a window to reveal flow rate information through the switch.
8. The switch of Claim 6 wherein said flange has an outer perimeter and said housing includes an aperture and an annular ridge in coaxial alignment with the aperture, the aperture receiving the hub of the valve and the ridge surrounding a substantial portion of the flange outer perimeter.
9. The switch of Claim 1 wherein the fluid path of the valve operably connects to a pair of parallel spaced fluid passages within the housing.
10. The switch of Claim 9 wherein the fluid path of the valve angularly connects to the spaced fluid passages within the housing.
11. The switch of Claim 9 wherein the fluid path of the valve connects to at least one of the spaced fluid passages within the housing at an angle of one hundred and thirty five degrees.
12. The switch of Claim 9 wherein the fluid path of the valve is T-shaped.
13. The switch of Claim 1 wherein the valve is removably attachable to a handle.
14. The switch of Claim 13 wherein the handle includes a crook adapted to receive a portion of a tube.
15. The switch of Claim 1 wherein the capillary tubes are microbored glass.
16. The switch of Claim 1 wherein the capillary tubes allow different flow rates of the therapeutic fluid.
CA002354130A 1999-10-15 2000-09-12 Fluid flow rate switching device Expired - Fee Related CA2354130C (en)

Applications Claiming Priority (3)

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US09/418,650 US6273133B1 (en) 1999-10-15 1999-10-15 Fluid flow rate switching device
US09/418,650 1999-10-15
PCT/US2000/025013 WO2001028610A1 (en) 1999-10-15 2000-09-12 Fluid flow rate switching device

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CA2354130A1 CA2354130A1 (en) 2001-04-26
CA2354130C true CA2354130C (en) 2008-11-18

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EP (1) EP1140256B1 (en)
JP (3) JP2003512100A (en)
KR (1) KR100682423B1 (en)
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AR (1) AR026048A1 (en)
AT (1) ATE283079T1 (en)
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Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6726647B1 (en) 1998-10-23 2004-04-27 Gambro Ab Method and device for measuring access flow
DE10250391B4 (en) * 2002-10-29 2006-05-24 Smiths Medical Deutschland Gmbh Control valve for adjusting the volume flow during an infusion or transfusion process
US7553296B2 (en) * 2003-02-14 2009-06-30 Tyco Healthcare Group Lp Safety device with trigger mechanism
US7220244B2 (en) * 2003-08-04 2007-05-22 Bioquiddity, Inc. Infusion apparatus with constant force spring energy source
US7169128B2 (en) * 2003-08-04 2007-01-30 Bioquiddity, Inc. Multichannel fluid delivery device
US20050033232A1 (en) * 2003-08-05 2005-02-10 Kriesel Marshall S. Infusion apparatus with modulated flow control
KR100578001B1 (en) * 2004-05-03 2007-11-30 (주)이화바이오메딕스 Regulator for quantity of injection
US7220245B2 (en) * 2004-05-26 2007-05-22 Kriesel Marshall S Infusion apparatus
US20050277883A1 (en) * 2004-05-26 2005-12-15 Kriesel Marshall S Fluid delivery device
US7470253B2 (en) * 2004-05-26 2008-12-30 Bioquiddity, Inc. Fluid delivery apparatus with adjustable flow rate control
US20050277884A1 (en) * 2004-05-26 2005-12-15 Kriesel Marshall S Fluid delivery apparatus with bellows reservoir
US20070156090A1 (en) * 2004-05-26 2007-07-05 Kriesel Marshall S Fluid delivery apparatus
US8029468B2 (en) * 2005-02-15 2011-10-04 Bioquiddity, Inc. Fluid delivery and mixing apparatus with flow rate control
US20080009835A1 (en) * 2005-02-17 2008-01-10 Kriesel Marshall S Fluid dispensing apparatus with flow rate control
US7694938B2 (en) * 2005-02-17 2010-04-13 Bioquiddity, Inc. Distal rate control device
US7837653B2 (en) * 2005-02-18 2010-11-23 Bioquiddity, Inc. Fluid delivery apparatus with vial fill
US20070119508A1 (en) * 2005-11-29 2007-05-31 West Richard L Fluid Flow Diversion Valve and Blood Collection System Employing Same
US7828772B2 (en) * 2006-03-15 2010-11-09 Bioquiddity, Inc. Fluid dispensing device
US7993304B2 (en) * 2006-03-15 2011-08-09 Bioquiddity, Inc. Fluid dispensing apparatus
US7690396B2 (en) * 2006-07-20 2010-04-06 Baxter International Inc. Multirate tubing flow restrictor
US8292848B2 (en) * 2006-07-31 2012-10-23 Bio Quiddity, Inc. Fluid dispensing device with additive
US8057435B2 (en) 2006-07-31 2011-11-15 Kriesel Joshua W Fluid dispenser
US20080243077A1 (en) * 2007-04-02 2008-10-02 Bivin Donald B Fluid dispenser with uniformly collapsible reservoir
US20080319385A1 (en) * 2007-06-25 2008-12-25 Kriesel Marshall S Fluid dispenser with additive sub-system
US8211059B2 (en) * 2007-06-25 2012-07-03 Kriesel Marshall S Fluid dispenser with additive sub-system
KR101065359B1 (en) * 2009-02-02 2011-09-16 주식회사 우영메디칼 Multi control apparatus for injecting a fixed quantity medicine
US8313085B2 (en) * 2009-08-03 2012-11-20 U.S. Innovations, Inc. Fluid flow control apparatus
US9258949B2 (en) 2013-06-19 2016-02-16 National Diversified Sales, Inc. Adjustable drip emitter
CN205339738U (en) * 2014-12-22 2016-06-29 胡绍勤 Flow velocity adjustor for transfusion
WO2020104918A1 (en) * 2018-11-20 2020-05-28 Cochlear Limited Selectable drug delivery rate device
KR102325058B1 (en) * 2019-02-25 2021-11-12 인제대학교 산학협력단 Negative pressure drain device with flow control valve
TWI714279B (en) 2019-09-24 2020-12-21 丁原傑 Temperature compensation current limiting device and elastic infusion system
DE102022205578A1 (en) * 2022-06-01 2023-12-07 B. Braun Melsungen Aktiengesellschaft Medical fluid control device

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3276472A (en) 1963-12-03 1966-10-04 Medex Inc Medical valve
US3678960A (en) 1970-06-08 1972-07-25 Saul Leibinsohn Stop cock
US3774604A (en) 1971-01-28 1973-11-27 Demeco Medical Products Ab Infusion cannula assembly
US3834372A (en) 1973-01-12 1974-09-10 S Turney Disposable manifold with atmospheric vent
US4210178A (en) * 1977-08-10 1980-07-01 Basta Michael I Perpetual by-pass flushing device
US4375813A (en) 1981-02-10 1983-03-08 Delmed, Inc. Medical fluid flow rate controlling device
US4566480A (en) 1982-11-01 1986-01-28 Parham Allan M Medical stopcock valve assembly
US4593717A (en) 1983-08-12 1986-06-10 Levasseur Joseph E Valve
IL73598A (en) 1984-11-23 1991-01-31 Leibinsohn Saul Fluid control device particularly useful in liquid transfusion apparatus
US4738283A (en) * 1986-05-08 1988-04-19 Matsushita Electric Industrial Co. Ltd. Gas flow controller
US5009251A (en) * 1988-11-15 1991-04-23 Baxter International, Inc. Fluid flow control
US4967797A (en) 1989-08-16 1990-11-06 Manska Wayne E Tap valve
EP0518972B1 (en) 1990-03-08 1997-01-22 Macnaught Pty. Limited Flow controllers for fluid infusion sets
US5466228A (en) 1991-01-25 1995-11-14 California State University, Fresno Foundation Fluid control apparatus
DE4419369A1 (en) 1993-06-07 1994-12-22 Dieter Dr Goehmann Infusion set
US5427145A (en) 1993-10-07 1995-06-27 Abbott Laboratories Connector with integral valve
US5439452A (en) 1994-01-31 1995-08-08 Children's Medical Ventures, Inc. Limit stop valve infusion device
US5443453A (en) 1994-04-21 1995-08-22 Sherwood Medical Company Stop-cock valve
WO1996020744A1 (en) 1995-01-07 1996-07-11 Volker Lang Micro-infusion system
WO1996026760A1 (en) 1995-02-27 1996-09-06 Hector Urrutia Apparatus for controlling flow of biological/medical fluids to and from a patient
JP3203636B2 (en) 1996-04-10 2001-08-27 ニプロ株式会社 Flow control device

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AU774478B2 (en) 2004-07-01
CR6376A (en) 2004-04-06
KR100682423B1 (en) 2007-02-15
DE60016167D1 (en) 2004-12-30
JP2007236964A (en) 2007-09-20
JP2003512100A (en) 2003-04-02
JP2004337642A (en) 2004-12-02
KR20010093160A (en) 2001-10-27
BR0007221A (en) 2001-12-04
AU7374000A (en) 2001-04-30
PL348195A1 (en) 2002-05-06
TW476653B (en) 2002-02-21
CN1327391A (en) 2001-12-19
MXPA01006102A (en) 2005-04-19
US6273133B1 (en) 2001-08-14
WO2001028610A1 (en) 2001-04-26
CA2354130A1 (en) 2001-04-26
EP1140256B1 (en) 2004-11-24
DE60016167T2 (en) 2005-11-03
AR026048A1 (en) 2002-12-26
EP1140256A1 (en) 2001-10-10
ES2233439T3 (en) 2005-06-16
ATE283079T1 (en) 2004-12-15

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