EP2593175A1 - Soupape anti-écoulement libre - Google Patents

Soupape anti-écoulement libre

Info

Publication number
EP2593175A1
EP2593175A1 EP11732492.1A EP11732492A EP2593175A1 EP 2593175 A1 EP2593175 A1 EP 2593175A1 EP 11732492 A EP11732492 A EP 11732492A EP 2593175 A1 EP2593175 A1 EP 2593175A1
Authority
EP
European Patent Office
Prior art keywords
valve
tube
resilient portion
blocking part
component
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.)
Withdrawn
Application number
EP11732492.1A
Other languages
German (de)
English (en)
Inventor
Giancarlo Gagliardoni
Jan Willem Marinus Mijers
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.)
CEDIC Srl
Original Assignee
CEDIC Srl
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 CEDIC Srl filed Critical CEDIC Srl
Publication of EP2593175A1 publication Critical patent/EP2593175A1/fr
Withdrawn legal-status Critical Current

Links

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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/28—Clamping means for squeezing flexible tubes, e.g. roller clamps
    • A61M39/281—Automatic tube cut-off devices, e.g. squeezing tube on detection of air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/02—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm
    • 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
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/14212—Pumping with an aspiration and an expulsion action
    • A61M5/14232—Roller pumps

Definitions

  • the present invention relates to an anti free flow tube valve to be used with an enteral feeding pump adapted to feed nutritionals or an infusion pump adapted to infuse medical solutions to a patient. More particularly, the present invention relates to a tube valve connected to a tube which may be fitted into a cassette for use on enteral feeding sets or infusion sets and the like, wherein the tube valve prevents the free-flow of enteral formula through the enteral feeding set or of solutions through the infusion set unless the tube with the tube valve mounted in the cassette is properly mounted in a housing or some other structure of an enteral feeding pump or infusion pump.
  • infusion and feeding sets to administer solutions and food to a patient is well known in medical arts.
  • Infusion and enteral sets are used for both enteral and parenteral application, respectively.
  • Enteral feeding pumps are used to provide the patient with nutrition and medication (formula) when they are unable, for a variety of reason, to eat normally.
  • Parenteral (in- travenous) solutions are provided to patients to ensure adequate hydration and to provide needed nutrients, minerals and medication.
  • the enteral or infusion set is placed in a free standing arrangement in which gravity forces the formula or solution into the patient. The rate at which the solution enters the patient can be roughly controlled by various clamps, such as roller clamps, which are currently available on the market.
  • a regulating device such as an infusion pump
  • the clamps or valves used to regulate flow are typically open to their fullest extent to prevent the clamp or valve from interfering with the proper functioning of the pump.
  • the clamp or valve is opened with the expectation that the enteral feeding pump or infusion will control fluid flow through the enteral or infusion set.
  • emergencies or other distractions may prevent the medical personnel from properly loading the enteral or infusion sets in the enteral feeding pump or the infusion pump.
  • the enteral or infusion sets may be inadvertently dislodged from the pump during operation of the pump.
  • US 4,913,703, US 5,201 ,71 1 , and US 6,017,326 disclose a safety interlock system for a flow control apparatus provided with a magnetic field source in the region of its mounting to an administration feeding set having a magnetic source, such as a magnet, incorporated into the mounting member.
  • the flow control apparatus includes a magnetic field sensor switching component which detects the proper placement of administration feeding set in the recess of the flow control apparatus and prevents the operation of the flow control apparatus unless the mounting member of the administration feeding set is in a properly en- gaged position in the pump.
  • Such apparatus is complex and requires a magnetic field, corresponding sensors etc. which increase the cost of this medical equipment significantly.
  • WO 2010/149187 A1 discloses a pinch clamp assembly with a cassette as a base element and a clamp wherein the silicone tube is in an anti free flow condition as long as the as- sembly is not attached to the pump.
  • the cassette comprises attachment means for the silicone tubing on either side such that the central part of the tubing may be stretched when inserted into the pump with a peristaltic motor mechanism.
  • this assembly comprises a plurality of elements such as a spring and a clamp which render the construction rather complex.
  • a valve for engaging with a tube to be used in an enteral feeding or infusion pump which comprises a full anti free flow func- tionality, i. e. which ensures a closed state when assembled in a cassette of an enteral feeding or infusion pump, which on the other side allows liquids to be pumped through when mounted on a pump, which is of a simple construction thus ensuring low manufacturing costs, small in size, and which is compatible with the majority of existing pump devices.
  • a valve for engaging with a tube to be used in an enteral feeding or infusion pump adapted to feed a fluid to a patient comprises: a first portion having a cav- ity and adapted to be connected to a first tube, a second portion having a cavity and adapted to be connected to a second tube, a resilient portion having a cavity connecting the first portion and the second portion, and a blocking portion blocking the flow of fluid between the first tube and the second tube when the valve is in the closed position, wherein the resilient portion comprises an extension reserve adapted to release the flow of fluid be- tween the first tube and the second tube when the first and the second portions are moved away from each other in opposite directions to bring the valve into the open position.
  • the expansion reserve of the resilient portion ensures that only this particular area of the resilient portion is responsible for opening and closing the valve by pulling the first portion and the second portion apart in opposite directions the valve is brought from the closed into the open position, and as soon as the pulling force is no longer existent the valve will go back into the closed position due to the elastic retraction characteristics of the resilient portion. It is understood that for moving away from each other, analogously, one side of the valve may be fixed and the other may be pulled away to open the valve. In the open position of the valve fluid is allowed to flow from the first tube to the second tube or vice versa.
  • the capac- ity of the cavities of all components ensures a sufficient flow of fluid necessary to fulfil the infusion or enteral feeding requirements.
  • first portion, the second portion and the resilient portion are rotation- ally symmetric and aligned along a central axis.
  • Rotationally symmetric in the sense of this feature means that the respective components are substantially cylindrical and have a cir- cular outer cross section and inner cross section of the cavities which enables a simple structure and thus facilitates a less costly manufacture.
  • deviations from this rotational symmetry are possible, i. e. for attaching the valve according to the invention into a cassette of a pump.
  • the expansion reserve of the resilient portion includes at least one bellow.
  • the shape of a bellow improves the transfer of the stretching or pulling force easier to open the valve. It should be noted that the bellow does not negatively influence the elastic characteristics of the expansion reserve, however, the force necessary to expand the resilient portion decreases in comparison with a purely flat expansion reserve.
  • the expansion reserve has the function of a spring element which goes back in to its original position when no longer being pulled apart or stretched.
  • the blocking portion comprises a first blocking part and a second blocking part engaging with each other when the valve is in the closed position.
  • the engagement of the first blocking part and the second blocking part ensures a tight fit such that in the closed position the anti-free flow valve remains closed under a pressure of a minimum of 180 mbar.
  • the first blocking part is formed of relatively hard thermoplastic polymer material such as polypropylene (PP), polyvinylchloride (PVC) and poly- ethylene (PE)
  • the second blocking part is formed of relatively soft thermoplastic elastomer (TPE) material or silicone rubber material.
  • the first blocking part comprises a central radial surface and an outer radial surface connected by a plurality of links so as to form a plurality of channels wherein the central radial surface is configured to engage with a ring surface of the second blocking part.
  • the central radial surface, the outer radial surface and the ring surface must be parallel to each other to ensure a good engagement.
  • the size of the central radial surface and the corresponding size of the ring surface are configured such that the compressing force of both elements withstands the required pressure of the fluid. This means that the bigger the central radial surface and the ring surface, the smaller the compression force exerted by the expansion re- serve.
  • the central radial surface includes a protrusion extending into a corresponding recess of the second blocking part.
  • This protrusion prevents the unwanted opening of the valve by bending, i. e. if the flat radial surfaces of the first blocking part and the second blocking part are disengaged by bending the resilient portion of the valve according to the invention, the protrusion ensures that in the particular area of the two mating surfaces no disengagement will occur.
  • the first blocking part may alternatively be formed integrally with the first portion, the second portion or the resilient portion.
  • the more complex structure of the first blocking part may be used with the material of the first portion or the second portion so as to safe manufacturing and tooling costs.
  • the first portion comprises a first component and a second component configured to engage one end of the resilient portion between each other. Since the expansion reserve of the resilient portion is located on the outer perimeter of the resilient portion it is clear that the end of the resilient portion in the direction of the first portion must be firmly attached so as the resilient portion cannot become loose when the pulling force is applied in opposite directions to the first and second portions. Thus, that end of the resilient portion should be configured for optimum attachment with the first portion. Dividing the first portion into a first component and into a second component makes it possible to engage that end between the first component and the second component which may be assembled together with the resilient portion using pressurized air.
  • the resilient portion may be attached to the first portion by gluing, bonding, clamping or any other appropriate attachment method.
  • the resilient portion and the second portion are integrally formed. This may save additional manufacturing cost by combining two functions into one component, which does not negatively influence the overall function of the valve according to the invention. Adequate manufacturing methods for all components include injec- tion molding, double injection molding, liquid injection molding (LIM) and other adequate methods known in the art.
  • LIM liquid injection molding
  • the material of the resilient portion is preferably silicon rubber or a thermoplastic elastomer (TPE). Both materials can be injection molded, double injection molded or manufactured by liquid injection molding according to methods which are known in the art.
  • the material of the first portion is preferably a thermoplastic polymer material. This material is readily available at low costs and can be molded as mentioned above. It is further preferred that the first portion comprises a recess adapted to engage with a cassette of the enteral feeding or infusion pump. Such a cassette is in principle disclosed in WO 2010/149187 A1 . When the valve including its tubing is engaged and thus firmly attached with the cassette of the enteral feeding pump there is a definite point where the pulling force is applied.
  • the present invention also works if one side of the valve is firmly attached and the opposite side is pulled away from the attachment point.
  • the first portion comprises an outer flange adapted to attach the valve to a corresponding recess in a pump.
  • the silicon tubing is attached at the outside of the pump and led around a peristaltic element in a 180° fashion.
  • Providing a flange at the first portion of the valve will enable the valve according to the invention to be used in such a pump wherein the outer flange can be firmly attached to the corresponding recess in the pump. Therefore, the valve of the present invention can be used in such a pump without changing the setup or any elements of the pump.
  • Fig. 1 and 2 are a perspective view and a sectional view, respectively, of a valve assembly comprising a first embodiment of the present invention, is a section view of a first embodiment of the valve according to the invention showing one end of the valve assembly depicted in Fig.
  • FIG. 2 are a perspective view and a sectional view, respectively, of a first component of the first embodiment; is a sectional view of a second component of the first embodiment according to the invention; is a sectional view of a second embodiment of the valve according to the invention; is a sectional view of the second component used in the second embodiment according to the invention; is a sectional view of the resilient portion and the second portion used in the second embodiment of the present invention; is a perspective view of the resilient portion and the second portion shown in Fig.
  • FIG. 9 is a sectional view of a third embodiment of the valve according to the invention; are a perspective view and a sectional view, respectively, of a first component of the third embodiment according to the invention; are a perspective view and a sectional view, respectively, of a second component used in the third embodiment as shown in Fig. 1 1.
  • Figs. 16 is a sectional view of the resilient portion and the second portion as used in the third embodiment shown in Fig. 1 1 ;
  • Fig. 17 is a sectional view of a fourth embodiment of the valve according to the invention;
  • Fig. 18 is a sectional view of the resilient portion and the second portion used in the fourth embodiment as shown in Fig. 17;
  • Fig. 19 is a sectional view of the resilient portion used in the fourth embodiment as shown in Fig. 17;
  • Figs. 20 and 21 are a perspective view and a sectional view, respectively, of a second component used in the fourth embodiment as shown in Fig. 17; is a perspective and partly sectional view of the second component and the resilient portion of the fourth embodiment as shown in Fig. 17; is a partial perspective view of a peristaltic pump of the prior art; are a sectional view and a perspective view, respectively, of a fifth embodiment of the valve according to the invention; is a sectional view of a sixth embodiment of the valve according to the invention;
  • Fig. 27 is a sectional view of the resilient portion and the second portion used in the sixth embodiment as shown in Fig. 26;
  • Figs. 28 and 29 are a perspective view and a sectional view, respectively, of a first portion used in the sixth embodiment as shown in Fig. 26.
  • Fig. 1 shows a perspective view of a first embodiment of the valve according to the invention in a valve assembly 1 .
  • the valve assembly 1 comprises a first tube (not shown), a valve 3, a tube entry 5 and a second tube 7 connecting the valve 3 and the tube entry 5.
  • the second tube 7 may be made of silicon rubber material which is flexible so that it can be inserted into a cassette (see WO 2010/149187 A1 ) of an enteral feeding pump or an infusion pump or directly mounted on such a pump.
  • a cassette see WO 2010/149187 A1
  • the valve 3 and the tube entry 5 are usually attached to corresponding holding fixtures so that each end of the second tube 7 is firmly fixed.
  • Fig. 2 shows a sectional view of the valve assembly 1 as shown in Fig. 1.
  • Valve 3 at the one end of the valve assembly 1 will be in detail explained with reference to Fig. 3 and tube entry 5 located at the other end of valve assembly 1 is known in the prior art so that a further detailed description is omitted. From Fig. 2 it can be seen that in the case where valve 3 is in the open position a fluid entering the second tube 7 at tube entry 5 will be able to pass through a valve 3 and exit valve 3 via the first tube (not shown).
  • FIG. 3 shows a sectional view of a valve 3 according to a first embodiment of the present invention.
  • Valve 3 comprises a first portion 9, a resilient portion 1 1 and a second portion 13 wherein in this embodiment the resilient portion 1 1 and the second portion 13 are integrally formed out of silicone rubber material by (liquid) injection molding.
  • the second portion 13 is substantially identical with the second tube 7 having a second cavity 17.
  • First portion 9 which is to be connected to the first tube comprises a first component 19 and a second component 21 which is firmly pressed into first component 19 combining first cavity 20 with the cavity of the second component 21.
  • Second component 21 and first component 19 are at their respective ends which are directed to the resilient portion 1 1 configured at their perimeter such that the corresponding end of resilient portion 1 1 is clamped between second component 21 and first component 19.
  • first component 19 comprises a clamping recess 23 adapted to engage with a corresponding clamping protrusion 25 of the resilient portion 1 1. It is contemplated that the attachment of the resilient portion 1 1 to the first portion 9 may be done by other known attachment methods such as bonding, clamping with a ring or the like.
  • the resilient portion 1 1 also comprises a key element of the valve according to the inven- tion which is the expansion reserve 27 located at the outer perimeter of resilient portion 11.
  • This expansion reserve 27 functions as a spring element opening and closing valve 3 upon applying a force on the second portion 13 in an axial direction, i. e. a long axis 29 so as to pull apart first portion 9 from second portion 13.
  • the expanding and retracting of the expansion reserve is fully reversible.
  • the actual blocking of the flow of fluid from second cavity 17 to first cavity 20 or vice versa is performed by a blocking portion inside resilient portion 1 1.
  • the blocking portion includes a first blocking part 29 which is a radial surface on second component 21 and a second blocking part 31 located inside resilient portion 1 1 and connected to the outer shell of resil- ient portion 11 by a plurality of links 33.
  • the number of links 33 is four such that there are also four channels 35 formed in the inside of resilient portion 1 1 through which the fluid may flow upon opening of valve 3.
  • valve 3 is in the open position which means that expansion reserve 27 is expanded and thus the first blocking part 29 and the second blocking part 31 are not engagement with each other so as to allow the flow of fluid from second cavity 17 through channels 35 into first cavity 20.
  • first blocking part 29 and second blocking part 31 are in engagement with each other.
  • second blocking part 31 is made of the same material as the entire resilient portion 1 1 the relatively soft silicone rubber material is pressed onto the hard plastic surface of first blocking part 29 which is part of the second component 21 made of a thermoplastic polymer material which is polypropylene (PP) in the case of embodiment 1.
  • PP polypropylene
  • Resilient portion 1 1 comprises a tapered outer shape when reducing the diameter to the smaller diameter of second portion 13. This ensures that as much stretching or pulling force as possible can be transferred from second tube 7 to expansion reserve 27 which is one of the key components of valve 3.
  • Figs. 4 and 5 show a perspective view and a sectional view, respectively, of the first component 19 used in the first embodiment shown in Figs. 1 to 3.
  • One end of first component 19 is configured to be attached to the first tube (not shown), the other end is configured for optimum engagement with second component 21 and resilient portion 1 1.
  • first component 19 comprises two mounting recesses 37 such that valve 3 can be firmly at- tached to a cassette when used with a respective pump. It can also be seen in Figs. 4 and 5 that clamping recess 23 provides space for clamping protrusion 25 of resilient portion 1 1.
  • Fig. 5 shows that the first cavity 20 comprises a larger inner diameter towards the end which is directed to resilient portion 1 1. This enlargement is targeted to provide a press fit of second component 21 which is inserted into first component 19. Instead of a press fit, the first component 19 and the second component 21 may be glued or bonded together.
  • Fig. 6 shows a perspective view of second component 21 used in the first embodiment of the valve according to the invention.
  • the end with the larger diameter includes first blocking part 29 which in this embodiment is a plane, circularly shaped surface perpendicular to the flowing direction.
  • Second component 21 is further configured to be hollow such that first cavity 20 may provide its volume for the flow of fluid when the valve is open.
  • first component 19 and second component 21 are made of polypropylene (PP) which is easily moldable according to known methods.
  • Fig. 7 is a sectional view of a second embodiment of a valve 3 according to the invention.
  • the concept and construction of the second embodiment is very similar to the one of the first embodiment, the difference is substantially the design of the resilient portion 1 1 which instead of a flat expansion reserve 27 comprises a bellow 39.
  • the second embodiment does not comprise a tapered configuration of the resilient portion:
  • the resilient portion 1 1 comprises a step like transition between the resilient portion 1 1 and the second portion 13.
  • the effect of these differences is that the bellow-like shape of the expansion reserve 27 enables an easier transfer of the pulling or stretching force from the second portion 13 to the resilient portion 1 1.
  • the bellow 39 can be manufactured according to known molding techniques, and the shape and material of the bellow 39 ensures that the function as expansion reserve 27 or spring-like member is preserved.
  • the interior of the resilient portion 1 1 is substantially identical to the one of the first embodiment; however, due to the different structure of the transition area between the resilient portion 1 1 and the second portion 13 the design of the links 33 and channels 35 as part of the inner life of the resilient portion 1 1 differs slightly. It should be noted that the characteristics of the flow of fluid from one side to the other are not influenced by this design modification.
  • the second component 21 comprises the clamping recess 23 into which the clamping protrusion 25 of the resilient portion 1 1 engages.
  • This clamping setup is oriented in the opposite direction compared with the first embodiment shown in Fig. 3.
  • Fig. 8 shows the second component 21 in sectional view according to the second embodi- ment of the present invention.
  • the clamping protrusion 25 is now located on the outer edge of the second component 21 and not on the first component 19. Furthermore, the outer edge of the first blocking part 29 is flattened due to the shape of bellow 39 forming the expansion reserve 27.
  • Figs. 9 and 10 are a sectional view and a perspective view, respectively, of the resilient portion 1 1 and a second portion 13 according to the second embodiment of the present invention. As mentioned, both the resilient portion 1 1 and the second portion 13 are integrally formed out of silicone rubber tubing.
  • Fig. 9 are a sectional view and a perspective view, respectively, of the resilient portion 1 1 and a second portion 13 according to the second embodiment of the present invention. As mentioned, both the resilient portion 1 1 and the second portion 13 are integrally formed out of silicone rubber tubing.
  • the clamping protrusion 25 is now directed towards second portion 13 and that the second blocking part 31 comprises a sealing ring 41 on the circular surface.
  • This thin sealing ring 41 is pressed against the first blocking part 29 around the circular opening of first cavity 20 of second component 21. Due to the mentioned differences in material and due to the shape of the sealing ring 41 the sealing or blocking function of valve 3 is improved.
  • the sealing ring 41 can also be seen in Fig. 10 as well as the links 33 and channels 35 wherein the links 33 are responsible for holding the second blocking part 31 in place relative to the outer portions of the resilient portion 1 1.
  • Fig. 1 1 shows a sectional view of the third embodiment of the valve according to the invention.
  • the first locking part 29 comprises a central radial surface 43, an outer radial surface 45, links 33 between the central radial surface 43 and the outer radial surface 45 and channels 35.
  • the corresponding surface of the second blocking part 31 is located around a cylindrical cavity in the resilient portion 1 1 so that pressing the resilient portion 1 1 due to the compressing force of the expansion reserve 27 onto the central radial service 43 of the first blocking part 29 which presents one end of the second component 21 will block the flow of fluid between the second tube and the first tube.
  • the channels 35 for the flow of fluid and the blocking portion are therefore not integrated in the silicone rubber material of the resilient portion 1 1 as in the second embodiment but in the inner plastic construction of second component 21 .
  • the thermoplastic polymer material of the second component 21 is more easily moldable because no side action mold is needed.
  • the engaging of the open end of the resilient portion 1 1 between the first component 19 and the second component 21 is identical to the one described with respect to the second embodiment, and therefore a detailed description is not repeated.
  • Figs. 12 and 13 show a perspective view and a sectional view, respectively, of the first component 19 used in the third embodiment of the present invention.
  • the first component 19 comprises two mounting recesses 37 with parallel inner surfaces for the facilitation of mounting the valve assembly to a cassette to be used with a pump.
  • the function of the first component 19 in the third embodiment is substantially identical to the one in the first embodiment; however, the dimensions of the clamping recess 23 and the contacting end faces between the first component 19 and the second component 21 are slightly different.
  • Figs. 14 and 15 show a perspective view and a sectional view, respectively, of the second component 21 as used in the third embodiment of the present invention.
  • the elements of the blocking portion i. e. the first blocking part, are viewable in a better way when compared with the image of Fig. 1 1.
  • Fig. 16 shows a sectional view of the resilient portion 1 1 integral with the second portion 13 as used in the third embodiment of the present invention.
  • the clamping protrusion 23 is clearly visible extending towards the larger opening of the resilient portion 1 1 , and the second blocking part 31 comprises dimensions which fit with the size of the central radial sur- face 43 of the second component 21 forming the blocking portion of valve 3.
  • Fig. 17 shows a sectional view of a fourth embodiment of the valve according to the invention.
  • the fourth embodiment represents a further development of the third embodiment with the following differences.
  • the blocking portion, in particular the first blocking part 29 with the central radial surface 43 of second component 21 comprises a protrusion 47 in the fourth embodiment which extends into the cavity of the resilient portion 1 1 and the second portion 13, respectively.
  • the protrusion 47 can be better seen in Figs. 20 to 22 which will be described below.
  • resilient portion 1 1 and second portion 13 are no longer inte- grally formed.
  • resilient portion 1 1 silicone rubber material
  • Figs. 18 and 19 are sectional views of both portions and only the resilient portion 1 1 , respectively.
  • Both components, the resilient portion 1 1 and the second portion 13 can be manufactured as a two-component molding.
  • a thermoplastic elastomer TPE
  • PP polypropylene
  • the second blocking part 31 is a relatively thin circular area with an opening for the flow of fluid therethrough.
  • the surface close to the opening in the direction towards the bellow 39 of the resilient portion 1 1 is the area that in fact works as the blocking area, on which a sealing ring 41 may be included to improve the blocking function.
  • Figs. 20 and 21 show a perspective view and a sectional view, respectively, of the second component 21 according to the fourth embodiment of the present invention.
  • the shown second component 21 is in principle identical with the one shown in Figs. 14 and 15, respectively, for the third embodiment, the only difference is the protrusion 47 extending from the central radial surface 43. It can be seen that the central radial surface is not in the same plane as the remaining surfaces of the first blocking part 29, i. e. the radial surfaces of the links 33 and the outer radial surface 45. The planes are still parallel but the plane of the central radial surface protrudes slightly.
  • Fig. 22 shows a sectional view of the resilient portion and a perspective view of the second component 21 together in one drawing such that the blocking function becomes clearer.
  • the valve 3 of Fig. 22 is in the closed position, i. e. the central radial surface 43 engages the corresponding surface of the second blocking part 31 of resilient por- tion 1 1. Bellow 39 is therefore in the relaxed position.
  • Fig. 23 shows an enteral feeding or infusion pump 49 known in the art.
  • Pump 49 comprises a peristaltic drive mechanism 51 around which a silicon tubing 52 is mounted.
  • the silicon tubing 52 is attached to the pump at a plurality of recesses 53 with at least one flange 55 and led around the peristaltic drive mechanism in an angle of approximately 180°.
  • Fig. 23 is shown to demonstrate that the valve according to the invention may be used with such an infusion or enteral feeding pump if the fifth embodiment of the valve according to the invention is used.
  • Figs. 24 and 25 show a sectional view and a perspective view, respectively, of a fifth embodiment of a valve 3 according to the invention.
  • the fifth embodiment is from a functional perspective very similar to the fourth embodiment described earlier, the only difference is that the first component 19 comprises a flange 55 to be mounted to the recess 53 of the pump 49. It should be noted that different forms of flanges 55 are also possible which would render the valve according to the invention compatible with other pumps available in the market.
  • Fig. 26 is a sectional view of a sixth embodiment of the valve according to the invention.
  • This embodiment has been designed to further reduce the manufacturing costs by integrat- ing the first component 19 and the second component 21 into only one piece, the first portion 9.
  • First portion 9 therefore comprises the first blocking part 29 with the respective links 33 and channels 35 as well as protrusion 47 described above.
  • Having only one component instead of a first component and a second component means that the clamping or attaching of the resilient portion 1 1 to the first portion 9 must be solved in a different technical way.
  • the clamping recess of first portion 9 is oriented radially but not axi- ally as described with reference to the previous embodiments.
  • resilient portion 1 1 comprises a clamping protrusion 25 which is configured to mate with clamping recess 23 in first portion 9.
  • the second blocking part 31 is part of the second portion 13, and not of the resilient portion 1 1.
  • the sixth embodiment solves this by using soft polyvinyl chloride (PVC) for the second portion 13 and thus also for the second blocking part 31.
  • PVC polyvinyl chloride
  • Fig. 27 shows a detail in sectional view of the sixth embodiment of the valve according to the invention.
  • the resilient portion 1 1 and the second portion 13 are made of two different materials wherein the function of the second blocking part 31 is performed by the end surface of second portion 13. Further, it can be seen that resilient portion 1 1 and second portion 13 are in engagement with each other through a corresponding recess / protrusion combination.
  • Figs. 28 and 29 show a perspective view and a sectional view, respectively of first portion 9 according to the sixth embodiment of the present invention. The details of the elements of first portion 9 have been described with reference to the previous embodiments and are therefore not repeated at this point.
  • the resilient portion 1 1 including the expansion reserve 17 is designed such that a certain pretension is applied to the first and second blocking portions.
  • the material and the dimensions of the corresponding elements ensure a proper engagement of the blocking parts such that the block of flow of fluid is guaranteed.
  • a valve for engaging with a tube to be used in an enteral feeding or infusion pump which comprises a full anti free flow functionality, i. e. which ensures a closed state when assembled in a cassette of a enteral feeding or infusion pump, which on the other side allows liquids to be pumped through when mounted on a pump, which is of a simple construction thus ensuring low manufacturing costs, small in size, and which is compatible with the majority of existing pump devices.

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  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

L'invention concerne une soupape (3) destinée à venir en prise avec un tuyau à utiliser pour une pompe d'alimentation entérale ou de perfusion adaptée pour alimenter un fluide à un patient, laquelle comprend une première partie (9) ayant une première cavité (20) et pouvant être reliée à un premier tuyau, une deuxième partie (13) ayant une deuxième cavité (17) et pouvant être reliée à un deuxième tuyau (7), une partie élastique (11) ayant une cavité reliant la première partie (9) et la deuxième partie (13), et une partie de blocage bloquant l'écoulement de fluide entre le premier tuyau et le deuxième tuyau (7) lorsque la soupape (3) est dans la position fermée, la partie élastique (11) comprenant un réservoir d'expansion (27) adapté pour libérer l'écoulement de fluide entre le premier tuyau et le deuxième tuyau (7) lorsque les première (9) et deuxième (13) parties sont éloignées l'une de l'autre dans des directions opposées pour amener la soupape (3) dans la position ouverte.
EP11732492.1A 2011-07-18 2011-07-18 Soupape anti-écoulement libre Withdrawn EP2593175A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/062275 WO2013010580A1 (fr) 2011-07-18 2011-07-18 Soupape anti-écoulement libre

Publications (1)

Publication Number Publication Date
EP2593175A1 true EP2593175A1 (fr) 2013-05-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11732492.1A Withdrawn EP2593175A1 (fr) 2011-07-18 2011-07-18 Soupape anti-écoulement libre

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EP (1) EP2593175A1 (fr)
WO (1) WO2013010580A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9943681B2 (en) 2013-01-18 2018-04-17 Cedic S.R.L. Anti-free-flow valve
US20160193426A1 (en) * 2013-09-03 2016-07-07 Sanofi Drive assembly for a drug delivery device

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US3547401A (en) * 1968-06-07 1970-12-15 Abbott Lab Foldable bellows valve
US5201711A (en) 1987-09-30 1993-04-13 Sherwood Medical Company Safety interlock system for medical fluid pumps
US4913703A (en) 1987-09-30 1990-04-03 Sherwood Medical Company Safety interlock system for medical fluid pumps
FI90818C (fi) * 1991-11-08 1994-04-11 Planmeca Oy Hammashoitokoneen imulaitteen suljinmekanismi
US5336174A (en) * 1992-05-07 1994-08-09 Ivac Corporation Flow control valve
US6224578B1 (en) * 2000-05-04 2001-05-01 Sherwood Services, Ag Drip chamber anti free flow device
US20030229309A1 (en) * 2001-06-01 2003-12-11 Mitchell Babkes Inner lumen anti-free flow device
US7527608B2 (en) * 2002-08-12 2009-05-05 Lma North America, Inc. Medication infusion and aspiration system and method
AU2009348770B2 (en) 2009-06-25 2015-04-02 Nestec S.A. Pinch clamp assembly for an infusion cassette

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See references of WO2013010580A1 *

Also Published As

Publication number Publication date
WO2013010580A1 (fr) 2013-01-24

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