EP4601865A1 - Dispositif et procédé de raccordement de tubes en matière plastique - Google Patents

Dispositif et procédé de raccordement de tubes en matière plastique

Info

Publication number
EP4601865A1
EP4601865A1 EP23817695.2A EP23817695A EP4601865A1 EP 4601865 A1 EP4601865 A1 EP 4601865A1 EP 23817695 A EP23817695 A EP 23817695A EP 4601865 A1 EP4601865 A1 EP 4601865A1
Authority
EP
European Patent Office
Prior art keywords
hoses
clamp
tube
clamps
designed
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.)
Pending
Application number
EP23817695.2A
Other languages
German (de)
English (en)
Inventor
Klaus Jentsch
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.)
Lmb Soft Doo Nis
Original Assignee
Lmb Soft Doo Nis
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 Lmb Soft Doo Nis filed Critical Lmb Soft Doo Nis
Publication of EP4601865A1 publication Critical patent/EP4601865A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/861—Hand-held tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/857—Medical tube welding machines
    • 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
    • A61M39/10—Tube connectors; Tube couplings
    • A61M39/14—Tube connectors; Tube couplings for connecting tubes having sealed ends
    • A61M39/146—Tube connectors; Tube couplings for connecting tubes having sealed ends by cutting and welding
    • 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
    • A61M39/10—Tube connectors; Tube couplings
    • A61M39/16—Tube connectors; Tube couplings having provision for disinfection or sterilisation
    • A61M39/18—Methods or apparatus for making the connection under sterile conditions, i.e. sterile docking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/967—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes
    • B29C66/9672—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes involving special data inputs, e.g. involving barcodes, RFID tags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/005—Hoses, i.e. flexible
    • B29L2023/007—Medical tubes other than catheters

Definitions

  • the present disclosure relates to a device and a method for connecting plastic tubes, in particular tubes connected to blood bags.
  • US 2020 / 0 047 423 A1 discloses a device that uses a so-called wafer, which is previously heated to approximately 300 °C by supplying electrical energy, to first separate two blood bag tubes to be connected. Due to the heating of the wafer, the two tubes to be connected are melted at their respective separation points. The melted ends of the tube sections to be connected are then brought together in order to connect the tubes to one another.
  • the disadvantage of this technology is that the wafers are expensive due to the conductor track introduced into them and have to be disposed of after a connection process due to the high heating and the subsequent cooling process. As a result, a connection process is associated with high costs and material usage.
  • EP 4 035 723 A1 attempts to reduce the costs of a bonding process by replacing the wafer with a cutting element that is heated by bringing it into contact with a heating arrangement. This approach can indeed reduce the costs of a bonding process. However, it is also necessary to dispose of the cutting element after the separation process, so that a bonding process still involves costs and material usage.
  • a device for connecting plastic tubes, in particular tubes connected to blood bags has a first clamp and a second clamp, each of which has two opposing jaws for clamping off a first tube and a second tube.
  • the clamps can be used to clamp off the tubes and the tubes can also be connected when the tubes are carrying fluid.
  • the device further comprises a first separating unit and a second separating unit, each of which comprises an anvil and a blade for separating the first and second tubes at a respective separation point.
  • a first separating unit and a second separating unit each of which comprises an anvil and a blade for separating the first and second tubes at a respective separation point.
  • the device also has a movement unit which is designed to move at least one of the clamps, first clamp or second clamp, such that ends of the first and second hoses which are clamped and severed in the clamps can be brought into axial alignment and then into contact or abutment. As a result, the severed ends of the hoses to be connected which are clamped in the clamps can be brought into contact and thereby joined together.
  • the jaws of the first and second clamps and/or the anvil and the blade of the first and second separating units are designed as electrodes.
  • the electrodes can be exposed to high frequency energy in order to melt the first and second hoses in the area of the separation point before and/or during separation of the hoses.
  • melted means that the hoses 10, 12 made of plastic, in particular PVC, have already softened to such an extent that they melt together when they come into contact and are connected to one another in a cooled state.
  • the closed electrodes with the tube arranged between them as a dielectric thus form a capacitor. By applying high frequency energy to the capacitor, an electric field is generated between the electrodes and the tube is heated to such an extent that it melts.
  • the first and second tubes can be separated in a simple manner.
  • the jaws of the first or second clamp can be designed as electrodes.
  • the first and second separating units are arranged adjacent to the first or second clamp, so that a separation point of the first and second hoses is still sufficiently melted during separation.
  • the anvil and the blade of the first and second separating units can also be designed as electrodes in order to melt the separation point of the hose.
  • both the jaws and the anvil and the blade are designed as electrodes in order to be exposed to high-frequency energy.
  • the movement unit is designed to bring the clamped and severed ends of the first and second hoses into contact in a melted state. As a result, the severed and clamped ends of the first and second hoses are joined together with a precise fit, so that after the hoses have cooled down, a connection is established between the first and second hoses.
  • clamps, the separation units and the movement unit can each be driven by an electric motor.
  • simple control of the individual components can be implemented, e.g. by controlling them using a control unit such as a microcontroller.
  • the high frequency energy has a frequency between 25 and 45 MHz.
  • This frequency range is particularly suitable for melting using high frequency energy.
  • a frequency of 40.68 MHz ⁇ 5 kHz has proven particularly advantageous for melting blood bag tubes.
  • the blades each have a width transverse to the axial direction of the first and second hoses that corresponds to at least one diameter of the first and second hoses. Consequently, the hoses can be separated reliably and completely.
  • the device according to the disclosure can have a high-frequency generator that is designed to apply high-frequency energy to the electrodes.
  • the high-frequency generator can have a coil for this purpose, so that an oscillating circuit is formed together with the capacitor formed by the electrodes. Alternatively, the coil can also be arranged in the device connected to the electrodes.
  • the high-frequency generator can be connected to the electrodes in particular by means of a coaxial cable. In the event that both the jaws and the blade and the anvil can be applied with high-frequency energy, the high-frequency generator can have several outputs or several high-frequency generators can be used. It is also conceivable that different frequencies are used for the jaws and for the blade and the anvil.
  • the high-frequency generator is particularly preferably communicatively connected to a control unit of the device, so that the application of high-frequency energy to the electrodes can be appropriately controlled.
  • the jaws of the first and second clamps can be designed as electrodes and can be subjected to high frequency energy by the high frequency generator.
  • the high frequency generator can then be designed to apply high frequency energy to the jaws of the first and second clamps, respectively, before and/or while the clamped and severed ends of the first and second hoses are brought into contact. Consequently, the severed ends of the hoses, which are still held in the clamp, can be subjected to high frequency energy again so that they are melted again. In this way, a reliable and secure connection of the two hoses can be achieved.
  • the movement device can be designed to interrupt the bringing of the clamped and severed ends into contact before and/or during the clamped and severed ends are brought into contact. Consequently, high frequency energy can be applied again to the jaws of the clamps in order to melt the severed ends clamped in the clamps for a sufficient time so that a reliable connection of the two hoses is obtained.
  • the first and second clamps are designed to continue to clamp the ends after the severed ends have been brought into contact and cooled.
  • the movement unit can be designed to move the closed clamps away from one another in an axial direction of the hoses. This procedure ensures that the connection point between the connected hoses is opened so that fluid can flow reliably.
  • the connection point can be checked for its tensile strength.
  • the movement unit can preferably have two platforms that are arranged parallel to one another in a plane. At least one of the platforms can be movable in the plane.
  • the first clamp and the second separating unit can then be arranged on a first platform and the second clamp and the first separating unit can be arranged on a second platform. Consequently, the two clamps can be moved towards one another by means of a simple construction in order to bring the two severed and clamped ends of the first hose and the second hose into axial alignment and then into contact.
  • the blades can each have a straight section that is parallel to an abutment surface of the anvil.
  • the design of the blade as an electrode can be improved.
  • the hose section to be severed that is not clamped in the clamp can be welded, so that the separation and thus also the connection of fluid-carrying hoses is possible.
  • the blades each have an inclined section that is angled away from the clamp. This results in even more reliable welding of the hose section to be severed.
  • the jaws in a closed state can each form projections around the hose clamped therein in a direction in which the clamped and severed ends of the hoses are to be brought into contact.
  • the projections therefore act as a stamp around the clamped hose.
  • an abutment surface of the anvil and a clamping surface of one of the jaws can be aligned during the separation of the first and second hoses in relation to the hose to be separated, i.e. an axial direction of the hose. Since the hose is melted in the area of the separation point during the separation, it can be damaged by even a slight bend, so that an interior of the hose is contaminated. By arranging the abutment surface of the anvil and the clamping surface of one of the jaws, which is arranged on the side of the anvil, in alignment, this damage and the associated contamination can be prevented. Consequently, a sterile connection of the two hoses can be ensured even more reliably in this way.
  • a first and a second guide unit are provided for guiding the first and the second hose.
  • the hoses are properly guided to the clamps and the separating units without being twisted or kinked or arranged in any other disadvantageous manner.
  • the holding units can be formed by two shelves or by pins or hooks on which blood bags can be hung. This can prevent the blood bags from being accidentally dropped.
  • the device can have a cover, which is in particular transparent, and a sensor which is designed to detect a closed state of the cover.
  • a connection of the first and second hoses can then only be carried out if the sensor detects a closed state of the cover. Consequently, contamination of the hoses to be connected is reliably prevented and an operator of the device is protected from carelessly reaching into the moving components of the device.
  • a connection process can also be monitored by the operator through a transparent cover.
  • the device can advantageously have an input unit for detecting a type of hoses to be connected and/or an operator of the device.
  • the input unit can be formed in a variety of ways, e.g. by a keyboard, a touchscreen, a barcode or QR code reader, an RFID scanner or a fingerprint scanner. Consequently, the electrodes can be exposed to high frequency energy according to the hoses to be connected so that proper melting is achieved. In addition, the person who carried out a connection process can be documented.
  • a method for connecting plastic tubes, in particular tubes connected to blood bags firstly comprises a step for clamping a first tube and a second tube in a first clamp and a second clamp, each of which has two opposing jaws.
  • the tubes can be clamped off by the clamps and the tubes can also be connected when the tubes are in a fluid-carrying state.
  • the method further comprises a step of separating the first and second tubes at a respective separation point by means of a first separation unit and a second separation unit, each of which has an anvil and a blade. By using the anvil and blade, the two tubes can be separated without having to be fixed by means of a second clamp.
  • the method includes a step of moving at least one of the clamps, the first clamp or the second clamp, so that ends of the first and second hoses clamped and severed in the clamps are brought into axial alignment and then into abutment. Consequently, the severed ends of the hoses to be connected clamped in the clamps can be brought into abutment and joined together.
  • a step is carried out to apply high-frequency energy to the jaws of the first and second clamps and/or the anvil and the blade of the first and second separation units, which are designed as electrodes, in order to melt the first and second tubes in the region of the separation point.
  • the jaws of the first and second clamps and/or the anvil and the blade thus act as capacitor plates and the tube located therein as a dielectric. Consequently, the tube is melted by applying high-frequency energy, so that proper and sterile separation is achieved. It is therefore not necessary to heat the separation unit and in particular the blade itself, so that, in contrast to the prior art, it does not have to be disposed of after separation.
  • the method can comprise a step for providing a blood bag connected to the first tube before clamping off the first tube, and a step for providing a blood bag connected to the second tube before clamping off the first tube or at least before clamping off the second tube.
  • the blood bags can be held by a holding unit so that the method can be carried out in an appropriately reliable manner.
  • At least one of the tubes, the first tube or the second tube can be connected to a branch piece or a Y-branch, to which the first or the second blood bag and a further blood bag are connected via respective tubes.
  • a blood bag for taking blood from a blood donor with just one tube and a needle attached to it.
  • the tube of the blood bag, which has the separated blood components can then be separated from the needle and connected to a tube to which at least two further blood bags are connected via respective tubes via a branch piece.
  • Two of the blood components e.g. plasma and buffy coat, can then be transferred from the original blood bag to the other blood bags. This procedure avoids plastic waste that is generated when a blood sample is unusable or is not subsequently released by the donor.
  • hoses 10, 12 melts it if sufficient heat is supplied.
  • the hoses 10, 12 can then be separated in a simple manner and then brought into contact in a melted state. It should be noted that melted means that the tubes 10, 12 made of plastic, in particular PVC, have already softened to such an extent that they melt together when they come into contact and are connected to one another in a cooled state.
  • a connection process is started by the control unit of the device.
  • a connection process using the device 1 described above for connecting plastic tubes 10, 12 is described below with reference to Figures 4 to 11.
  • the clamps 14, 16 are first closed and the first and second hoses 10, 12 are clamped off so that fluid flow is interrupted.
  • the separation units 26, 28 are still open in Fig. 4.
  • the jaw 18 and the anvil 30 can preferably be arranged before the cutting process such that an inner surface of the jaw 18 and an abutment surface 52 of the anvil 30 are arranged in alignment with respect to an axial direction of the hose 10 (see alignment line F1 in Fig. 5). This can prevent kinking during the cutting process so that the hose 10 is not damaged in a melted state.
  • the jaw 24 and the anvil 34 can be arranged such that an inner surface of the jaw 24 and an abutment surface 54 of the anvil 34 are arranged in alignment with respect to an axial direction of the hose 12 (see alignment line F2 in Fig. 5).
  • the first and second separating units 26 and 28 are then also closed.
  • the hoses 10 and 12 are then heated in the area of a separating point where they are to be separated. The heating takes place, as described above, by applying high-frequency energy to the terminals 14 and 16 or to the separating units 26 and 28. Alternatively, high-frequency energy can also be applied to the terminals 14, 16 and the separating units 26, 28.
  • the blades 32 and 36 preferably have a straight section 56 and 60, respectively, which are parallel to the abutment surfaces 52 and 54, respectively. Accordingly, the blades 32, 36 can be suitably designed as electrodes in order to adequately heat the tubes 10, 12 arranged in the separating units 26, 28.
  • the blades 32 and 36 can each have an inclined section. section 58 and 62 respectively.
  • the inclined sections 58, 62 are inclined away from the clamps 14 and 16, ie in the direction of the distal ends of the hoses 10, 12.
  • the device 1 is thus suitable for connecting two fluid-carrying hoses 10, 12.
  • the clamps 14, 16 and the separation units 26, 28 are spatially separated from one another by moving the first and second platforms 40 and 42 of the movement unit 38 away from one another in the axial direction of the hoses 10, 12, as shown in Fig. 7. It should be noted that this can be done by moving at least one of the platforms 40 or 42 or by moving both platforms 40 and 42. Preferably, the separation units 26 and 28 are also closed during this process, so that proper separation of the hoses 10, 12 is ensured.
  • one of the platforms 40 or 42 or both platforms 40 and 42 are moved transversely to the axial direction of the tubes 10, 12 in order to bring the two severed ends of the tubes 10, 12 clamped in the clamps 14, 16 into axial alignment.
  • this process can be carried out in a simple manner since the movement unit 38 has the first platform 40 and the second platform 42 and the first clamp 14 and the second separation unit 28 are arranged on the first platform 40 and the second clamp 16 and the first separation unit 26 on the second platform 42.
  • the two tubes 10, 12 are arranged antiparallel with their flow direction from a blood bag to an outlet of the tubes 10, 12. Consequently, the tubes can be brought into axial alignment by simply sliding them in a direction transverse to the axial direction of the tubes 10, 12.
  • the jaws 18, 20, 22, 24 of the clamps 14, 16 can be designed as electrodes and can therefore be subjected to high-frequency energy again before and/or during the connection, so that the ends of the hoses 10, 12 clamped and severed in the clamps 14, 16 are melted again.
  • the movement device 38 can be designed such that it interrupts the connection of the clamped and severed ends. Consequently, high-frequency energy can be applied to the clamps 14, 16 for an appropriate time so that the severed ends of the two hoses 10, 12 are sufficiently melted. Consequently, a proper connection between the two hoses 10, 12 is ensured even more reliably.
  • Fig. 10 shows the bringing into contact of the two severed and clamped ends of the hoses 10, 12.
  • the clamps 14, 16 in a closed state form projections 64, 66 around the clamped and severed ends of the hoses 10, 12 in a direction in which the ends are to be brought into contact.
  • the projections 64, 66 can be cylindrical or cuboid-shaped and function as a stamp to ensure that the severed and melted ends are reliably brought into contact.
  • the two clamps 14, 16 can be moved apart in a closed state in the axial direction of the hoses 10, 12 (not shown in the figures). In this way, a connection of the two hoses 10, 12 can be tested for its tensile strength. In addition, a connection point 64 (see Fig. 10) is opened by this movement apart, so that a fluid flow between the two hoses 10, 12 is possible.
  • the device 1 for connecting plastic hoses according to the present disclosure is capable of connecting two hoses 10, 12 together. without producing wear material. As a result, the running costs for a joining process can also be significantly reduced.
  • the first tube 10 When carrying out the connection process, it is particularly preferred for the first tube 10 to be connected at one end to a blood bag containing blood from a blood donor. The other end of the tube 10 is then connected to a needle used to take the blood from the blood donor.
  • the second tube 12 is connected to a branch piece or a Y-branch to which at least two further blood bags, so-called satellite bags, are connected.
  • the blood sample After the blood sample has been tested for usability and found to be suitable, it can be separated into its blood components, for example by centrifugation.
  • the tube 10 can then be separated from the needle and connected to the tube 12. Two of the blood components, e.g. plasma and buffy coat, can then be transferred from the original blood bag to the other blood bags. This procedure avoids plastic waste that is generated when a blood sample that has been taken turns out to be unusable or is subsequently not released by the donor.
  • the blood donation process is made much easier because a blood donor or blood donation staff has to handle less material.
  • the present disclosure has been described with respect to tubes 10, 12 connected to blood bags.
  • the disclosure is also applicable to other tubes that can be heated by means of high frequency.
  • the disclosure can also be used in other fields, eg pharmacy, chemistry and biology.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Anesthesiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Pulmonology (AREA)
  • Epidemiology (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • External Artificial Organs (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

Un dispositif (1) pour raccorder des tubes (10, 12) en matière plastique, en particulier des tubes raccordés à des poches de sang, comprend : une première pince (14) et une seconde pince (16), chacune d'elles ayant deux mâchoires opposées (18, 20, 22, 24) afin de serrer un premier tube (10) et un second tube (12) ; une première unité de sectionnement (26) et une seconde unité de sectionnement (28), chacune d'elles ayant une enclume (30, 34) et une lame (32, 36) afin de sectionner les premier et second tubes (10, 12) en un point de sectionnement respectif ; et une unité de déplacement (38) qui est conçue pour déplacer au moins l'une des pinces, la première pince (14) ou la seconde pince (16), de telle sorte que les extrémités du premier et du second tube (10, 12) serrées dans les pinces et sectionnées peuvent être amenées en alignement axial puis en contact. Les mâchoires (18, 20, 22, 24) de la première et de la seconde pince (14, 16) et/ou l'enclume (30, 34) et la lame (32, 36) de la première et de la seconde unité de sectionnement (26, 28) sont conçues en tant qu'électrodes auxquelles une énergie haute fréquence peut être appliquée afin de faire fondre les extrémités des premier et second tubes (10, 12) dans la région du point de sectionnement avant et/ou après le sectionnement des tubes (10, 12). L'unité de déplacement (38) est conçue pour amener les extrémités serrées et sectionnées des premier et second tubes (10, 12) en contact lorsqu'elles sont dans un état fondu.
EP23817695.2A 2022-12-02 2023-11-30 Dispositif et procédé de raccordement de tubes en matière plastique Pending EP4601865A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022132053.7A DE102022132053A1 (de) 2022-12-02 2022-12-02 Vorrichtung und Verfahren zum Verbinden von Schläuchen aus Kunststoff
PCT/EP2023/083746 WO2024115665A1 (fr) 2022-12-02 2023-11-30 Dispositif et procédé de raccordement de tubes en matière plastique

Publications (1)

Publication Number Publication Date
EP4601865A1 true EP4601865A1 (fr) 2025-08-20

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EP23817695.2A Pending EP4601865A1 (fr) 2022-12-02 2023-11-30 Dispositif et procédé de raccordement de tubes en matière plastique

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EP (1) EP4601865A1 (fr)
JP (1) JP2025540144A (fr)
KR (1) KR20250115423A (fr)
CN (1) CN120513165A (fr)
AU (1) AU2023401057A1 (fr)
DE (1) DE102022132053A1 (fr)
MX (1) MX2025006407A (fr)
WO (1) WO2024115665A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023106765A1 (de) 2023-03-17 2024-10-17 Lmb Soft Doo Nis Blutbeutelhandhabungsvorrichtung, Blutbeutelhandhabungssystem und Blutbeutelhandhabungsverfahren

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5254825A (en) * 1992-01-13 1993-10-19 Npbi Nederlands Produktielaboratorium Voor Bloedtransfusieapparatuur En Infusievloeistoffen B.V. Apparatus for the sealing of medical plastic articles
US5771914A (en) * 1997-02-13 1998-06-30 Baxter International Inc. Flexible fluid junction
DE102007032771A1 (de) * 2007-07-13 2009-01-15 Kopetzky, Robert, Dr. Verbindungsvorrichtung
EP2420286A1 (fr) * 2010-08-18 2012-02-22 Fresenius Kabi Deutschland GmbH Procédé et dispositif de liaison stérile de tuyaux flexibles
US9440396B2 (en) * 2014-06-19 2016-09-13 Fenwal, Inc. Sterile connection device for making multiple connections
EP3603734B1 (fr) * 2017-03-24 2024-01-10 Terumo Kabushiki Kaisha Dispositif d'assemblage de tubes
EP4035723A1 (fr) 2021-01-25 2022-08-03 Fenwal, Inc. Connexion stérile de tubage

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AU2023401057A1 (en) 2025-05-29
DE102022132053A1 (de) 2024-06-13
CN120513165A (zh) 2025-08-19
JP2025540144A (ja) 2025-12-11
MX2025006407A (es) 2025-09-02
WO2024115665A1 (fr) 2024-06-06
KR20250115423A (ko) 2025-07-30

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