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WO2004071684A1 - Tube autonettoyant - Google Patents

Tube autonettoyant Download PDF

Info

Publication number
WO2004071684A1
WO2004071684A1 PCT/GB2004/000505 GB2004000505W WO2004071684A1 WO 2004071684 A1 WO2004071684 A1 WO 2004071684A1 GB 2004000505 W GB2004000505 W GB 2004000505W WO 2004071684 A1 WO2004071684 A1 WO 2004071684A1
Authority
WO
WIPO (PCT)
Prior art keywords
tubing
piezo
axial
electric
electric elements
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.)
Ceased
Application number
PCT/GB2004/000505
Other languages
English (en)
Inventor
Robert Stevens
Michael Hendrik Jan Vloberghs
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.)
Science and Technology Facilities Council
Original Assignee
Science and Technology Facilities Council
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 Science and Technology Facilities Council filed Critical Science and Technology Facilities Council
Publication of WO2004071684A1 publication Critical patent/WO2004071684A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • F16L11/127—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting electrically conducting
    • 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
    • A61M25/00—Catheters; Hollow probes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B17/00—Methods preventing fouling
    • B08B17/02—Preventing deposition of fouling or of dust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
    • F04B43/09—Pumps having electric drive
    • F04B43/095—Piezoelectric drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • 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
    • A61M25/00—Catheters; Hollow probes
    • A61M2025/0019—Cleaning catheters or the like, e.g. for reuse of the device, for avoiding replacement

Definitions

  • the present invention relates to a self-cleaning tube and in particular to a micro-tube suitable for use in medical and surgical procedures.
  • a fluid is passed through a tube, depending upon the nature of the fluid, there is a risk that matter from the fluid will be deposited on the inner surface of the tube. This is especially the case with biological fluid for example.
  • the deposition can quickly build up to a point where the tube becomes partially or fully blocked.
  • Much effort is therefore made to filter and clean the fluids that are circulated through tubing or piping to reduce the presence of such matter in the fluid stream and thereby reduce the effects of the deposition of such matter.
  • the problems become acute the smaller the bore of the tubing and thus is of particular concern with micro- tubing that is used in medical and surgical procedures.
  • the present invention seeks to provide self- cleaning tubing that is capable of greatly reducing if not eliminating the deposition of matter on its inner walls.
  • piezo-electric material in tubing to drive flexure of the tubing
  • an example of a piezo tube is described in US 6,194,813.
  • piezo tubes are limited in use to producing spatial movements of the entire tubing away from the axis of the tube and involve dividing the wall of the tube circumferentially into four sections.
  • a piezoelectric transducer for generating ultrasound particularly for use in ultrasonic cleaning is described.
  • the piezoelectric transducer comprises a vibrating plate for transferring vibrations to a fluid and comprising at least one piezoelectric element for generating ultrasound.
  • tubing for the passage of a fluid comprising: a resilient tubular support; a plurality of piezo-electric elements, each element being arranged at a respective axial location along the tubular support; and phased drive circuitry connected to the plurality of axial piezo-electric elements, wherein each one of the plurality of axial piezo-electric elements is separately addressable by means of the drive circuitry and the drive circuitry is adapted to issue respective phased driver signals to each one of the plurality of axial piezo-electric elements with the phase of the driver signal for each axial piezo-electric element being dependent upon the axial position of the axial piezo-electric element.
  • the tubing is adapted to perform a peristaltic action thereby reducing and in many cases preventing the deposition and accumulation of matter on the inner walls of the tubing.
  • the tubing is particularly suited to use in medicine, for example as a catheter, and also in the food and chemical industries.
  • Figure 1 is a schematic diagram of self-cleaning micro-tubing in accordance with the present invention
  • Figure 2a is a diagram of individual control elements and their interconnections in the micro-tubing of Figure 1 ;
  • Figure 2b illustrates one example of the type of control signals that may be used to induce a peristaltic action in the micro-tubing of Figure 1 ;
  • Figures 3a to 3d are schematic diagrams of the fabrication process for the micro-tubing of Figure 1 ; and Figure 4 illustrates one method of forming, from the planar structure produced according to the method illustrated in Figures 3a to 3d, the micro- tubing of Figure 1.
  • Figure 1 shows a section of micro-tubing 1 that is suitable for use in a catheter and other medical and surgical equipment and procedures.
  • the device is suitable for tubes with an inner diameter ranging from approximately 1 mm upwards and with a tube wall thickness of approximately 0.5mm upwards.
  • the micro-tubing 1 has an outer sleeve 2 of the bulk material of the tubing such as a polymer material.
  • a polymer material such as silicone.
  • the material could be Teflon TM.
  • Inside of the outer sleeve 2 is a piezo-electric array 3 that is controlled by drive circuitry 4 which is mounted on a flexible circuit board that is in the form of a tubular support.
  • Electrical contacts 5 supply power to the piezo-electric array and an antenna 6 may be provided within the outer sleeve 2 to provide remote charging of the power source.
  • the antenna 6 is designed to allow electrical power transmission through the body wall of a patient. This is necessary to eliminate power cables running through the skin and body wall which will increase the probability of infection.
  • the piezo-electric array 3 consists of a plurality of separately addressable piezo-electric transducers 7 distributed circumferentially and axially along the tubing.
  • the individual piezo-electric elements of the array are evenly spaced axially along the tubing.
  • Appropriate sequencing of the phased driver signals which actuate the individual piezo-electric transducers 7, by means of the circuit connections 8, can result in a pressure wave tangential to the inner surface being applied to the fluid within the tubing.
  • the driver signals issued to the individual piezo-electric transducers are phased in dependence upon the axial position of the piezo-electric transducer.
  • the driver signals may additionally be phased with respect to the circumferential position of individual piezo-electric transducers.
  • a plurality of piezo-electric transducers having a common axial position along the tubing 1 are actuated together.
  • Figure 2b an example of a sequence of driving pulses for three series of piezo-electric transducers A, B and C at three different but adjacent axial positions along the tubing is illustrated.
  • the A series of transducers is actuated first and subsequently series B and then series C are actuated in turn with a partial overlap in the driving signals supplied to each transducer series.
  • the individual piezo-electric transducers 7, which can be single slab piezo transducer or bi-morph (dual slab) transducers are distributed evenly around the circumference of the tubing with the axial spacing between the piezo-electric elements preferably differing from the circumferential spacing of the piezo-electric elements.
  • Phased electrical driving signals ensure that the inner surface of the tube is repeatedly agitated.
  • the segmented transducer system allows a combination of axial and circumferential pressure waves to be applied to the fluid in the tube.
  • Figures 3a to 3d one method of fabrication the micro-tubing described above is illustrated.
  • a flexible circuit board 4 consisting of, for example, a polyimide film 9 such as that available from DuPont under the trade name KaptonTM on which the necessary control and power circuitry 10 for driving the piezoelectric transducers is written along with a power supply line 11.
  • a layer of conductive adhesive 12 such as Ablebond 84-1 TM is applied to the upper surface of the circuit board 9 and is used to adhere a PZT (lead zirconate titanate) thin film layer 13 on which sintered contacts 14 such as copper contacts are already established.
  • a blast resistant mask 15 is then applied and patterned so as to define the structure of the desired piezo-electric transducers 7.
  • the piezo-electric layer 13 is then powder blasted through the blast resistant mask 15 to define the transducer structure.
  • the etching of the PZT film is controlled to achieve a desired angle ⁇ which is the angle of the side walls of each transducer element with respect to the perpendicular.
  • the angle ⁇ is significant because later in the fabrication procedure the circuit board will be curved to describe a cylinder and it is important to ensure that the edges of adjacent transducers do not contact one another.
  • the range of angle is dependent on the tube diameter and the number of segments around the circumference.
  • the blast resistance mask 15 is removed and the upper surface of the circuit board and the transducers is spray coated with a photo- imageable insulator 16 such as polyimide BLB etc.
  • a mask is applied over the insulator 16 so that it may be etched to expose a selected region of the upper contact of each transducer.
  • a common electrode 17 is deposited over the insulator and the exposed regions of the transducers using for example a conventional vacuum coating deposition process. Finally the common electrode 17 is patterned using conventional lithographic and etching techniques.
  • the underside of the flexible circuit board 4 is cut 18 at regular intervals by means of laser ablation so as to further improve the flexibility of the structure and then the structure is sliced into a series of long strips with each strip intended to from a single tube.
  • each strip is then rolled together to form the tube and the inner surface of the tube is preferably coated with a planarising polymer solution which may additionally contain an anti-bacterial agent.
  • This inner layer may be introduced by passing the polymer solution through the tube.
  • External electrodes are attached to provide the power connection and finally the outer surface of the tube is coated with the bulk polymer material 2.
  • the antenna 6 may also be incorporated into the structure at this stage in the fabrication process.
  • the antenna could be a simple loop antenna consisting of electrical wire. This is incorporated into the outer sheath.
  • the strip may be rolled into a tube structure using a jig (not illustrated) which gradually urges the long sides of the strip towards one another.
  • a jig not illustrated
  • each of the long edges of the strip has a dry curable adhesive applied 19 so that when the long edges contact one another the adhesive may be activated to secure the edges together.
  • a cylindrical former 20 may be used to shape the tube.
  • the layout of the microstructures may be chosen to accommodate greater flexibility and achieve a smaller minimum radius through a greater use of laser ablation of the circuit board substrate in selected regions.
  • a meandering electrical trace may be defined between adjacent common addressing pads. Such a meander allows the Kapton to extend and compress, when the tube is flexed.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Pulmonology (AREA)
  • Anesthesiology (AREA)
  • Biophysics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

L'invention concerne un tube autonettoyant (1) présentant une gaine extérieure (2) et un ensemble piézo-électrique (3) commandé par un circuit de commande (4) monté sur une carte de circuits imprimés flexible. Les éléments piézo-électriques de l'ensemble (3) sont adressables séparément par des signaux en phase, la phase du signal de commande étant déterminée par rapport à la position axiale de l'élément piézo-électrique dans l'ensemble. Ce tube autonettoyant (1) est par conséquent adapté pour produire une action de type péristaltique qui empêche ou réduit la formation de dépôts sur la paroi interne du tube. Ce tube autonettoyant est particulièrement approprié pour des applications médicales, par exemple sous la forme de d'un cathéter, et pour des applications dans l'industrie alimentaire et dans l'industrie chimique.
PCT/GB2004/000505 2003-02-14 2004-02-09 Tube autonettoyant Ceased WO2004071684A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0303432.9A GB0303432D0 (en) 2003-02-14 2003-02-14 Self-cleaning tube
GB0303432.9 2003-02-14

Publications (1)

Publication Number Publication Date
WO2004071684A1 true WO2004071684A1 (fr) 2004-08-26

Family

ID=9953036

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/000505 Ceased WO2004071684A1 (fr) 2003-02-14 2004-02-09 Tube autonettoyant

Country Status (2)

Country Link
GB (1) GB0303432D0 (fr)
WO (1) WO2004071684A1 (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006076428A1 (fr) * 2005-01-11 2006-07-20 Boston Scientific Limited, A Corporation Of Republic Of Ireland Systemes et procedes d'imagerie tridimensionnelle a reseau reglable en orientation
WO2007123444A1 (fr) * 2006-04-25 2007-11-01 St. Jude Medical Ab Capteur piezoelectrique, procede de fabrication d'un capteur piezoelectrique et fil medical implantable comprenant un tel capteur
WO2009096851A1 (fr) * 2008-01-28 2009-08-06 Milux Holding Sa Dispositif de drainage comprenant un dispositif de nettoyage de filtre
EP2316502A1 (fr) 2009-11-03 2011-05-04 Gambro Lundia AB Dispositifs de dialyse
DE102009051806A1 (de) 2009-11-03 2011-05-05 Gambro Lundia Ab Vorrichtung zur Unterstützung der Leberfunktion
WO2013041703A1 (fr) * 2011-09-21 2013-03-28 Sanofi-Aventis Deutschland Gmbh Pompe péristaltique et procédé de transport d'un matériau à l'aide d'une pompe péristaltique
US8874215B2 (en) 2008-10-10 2014-10-28 Peter Forsell System, an apparatus, and a method for treating a sexual dysfunctional female patient
US9060771B2 (en) 2008-01-29 2015-06-23 Peter Forsell Method and instrument for treating obesity
US9072907B2 (en) 2008-10-10 2015-07-07 Peter Forsell Heart help device, system, and method
US9655724B2 (en) 2000-02-11 2017-05-23 Peter Forsell Controlled impotence treatment
US9949812B2 (en) 2009-07-17 2018-04-24 Peter Forsell Vaginal operation method for the treatment of anal incontinence in women
US10219898B2 (en) 2008-10-10 2019-03-05 Peter Forsell Artificial valve
EP3450758A1 (fr) * 2017-08-28 2019-03-06 Vestel Elektronik Sanayi ve Ticaret A.S. Tuyau intelligent permettant d'éliminer une obstruction
US10583234B2 (en) 2008-10-10 2020-03-10 Peter Forsell Heart help device, system and method
CN111936195A (zh) * 2018-02-02 2020-11-13 麦克罗博医疗公司 具有自我监测能力的自清洁导管系统
US10952836B2 (en) 2009-07-17 2021-03-23 Peter Forsell Vaginal operation method for the treatment of urinary incontinence in women
US11123171B2 (en) 2008-10-10 2021-09-21 Peter Forsell Fastening means for implantable medical control assembly

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0134614A1 (fr) * 1983-08-15 1985-03-20 Vitafin N.V. Micropompe piézoélectrique
US4509947A (en) * 1982-08-02 1985-04-09 Medtronic, Inc. Self-cleaning drug delivery catheter and storage bladder
GB2238833A (en) * 1989-10-13 1991-06-12 Edward John Cook Peristaltic pump
DE9108664U1 (de) * 1991-07-15 1991-09-26 Nora-Elektronik GmbH, 5210 Troisdorf Stellglied auf Basis piezoelektrischer Elemente
EP0639717A1 (fr) * 1993-07-23 1995-02-22 Holzapfel, Martin Récipient pyroélectrique
WO1997042412A1 (fr) * 1996-05-06 1997-11-13 Pumping Systems Technologies Pty. Limited Pompe peristaltique pseudo statique
US6099495A (en) * 1998-04-30 2000-08-08 Medtronic, Inc. Implantable electrical transducer powered from capacitive storage energy source
US6194813B1 (en) * 1999-09-29 2001-02-27 Jacob Israelachvili Extended-range xyz linear piezo-mechanical scanner for scanning-probe and surface force applications

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4509947A (en) * 1982-08-02 1985-04-09 Medtronic, Inc. Self-cleaning drug delivery catheter and storage bladder
EP0134614A1 (fr) * 1983-08-15 1985-03-20 Vitafin N.V. Micropompe piézoélectrique
GB2238833A (en) * 1989-10-13 1991-06-12 Edward John Cook Peristaltic pump
DE9108664U1 (de) * 1991-07-15 1991-09-26 Nora-Elektronik GmbH, 5210 Troisdorf Stellglied auf Basis piezoelektrischer Elemente
EP0639717A1 (fr) * 1993-07-23 1995-02-22 Holzapfel, Martin Récipient pyroélectrique
WO1997042412A1 (fr) * 1996-05-06 1997-11-13 Pumping Systems Technologies Pty. Limited Pompe peristaltique pseudo statique
US6099495A (en) * 1998-04-30 2000-08-08 Medtronic, Inc. Implantable electrical transducer powered from capacitive storage energy source
US6194813B1 (en) * 1999-09-29 2001-02-27 Jacob Israelachvili Extended-range xyz linear piezo-mechanical scanner for scanning-probe and surface force applications

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9655724B2 (en) 2000-02-11 2017-05-23 Peter Forsell Controlled impotence treatment
WO2006076428A1 (fr) * 2005-01-11 2006-07-20 Boston Scientific Limited, A Corporation Of Republic Of Ireland Systemes et procedes d'imagerie tridimensionnelle a reseau reglable en orientation
WO2007123444A1 (fr) * 2006-04-25 2007-11-01 St. Jude Medical Ab Capteur piezoelectrique, procede de fabrication d'un capteur piezoelectrique et fil medical implantable comprenant un tel capteur
US8626313B2 (en) 2006-04-25 2014-01-07 St. Jude Medical, AB Piezoelectric sensor, a method for manufacturing a piezoelectric sensor and a medical implantable lead comprising such a piezoelectric sensor
US8961448B2 (en) 2008-01-28 2015-02-24 Peter Forsell Implantable drainage device
WO2009096851A1 (fr) * 2008-01-28 2009-08-06 Milux Holding Sa Dispositif de drainage comprenant un dispositif de nettoyage de filtre
WO2009096856A1 (fr) * 2008-01-28 2009-08-06 Milux Holding Sa Dispositif de drainage comprenant un filtre actif
US20100318118A1 (en) * 2008-01-28 2010-12-16 Peter Forsell Drainage device comprising an active filter
US9789290B2 (en) 2008-01-28 2017-10-17 Peter Forsell Drainage device comprising a filter cleaning device
US10384042B2 (en) * 2008-01-28 2019-08-20 Peter Forsell Drainage device comprising an active filter
US9060771B2 (en) 2008-01-29 2015-06-23 Peter Forsell Method and instrument for treating obesity
US8874215B2 (en) 2008-10-10 2014-10-28 Peter Forsell System, an apparatus, and a method for treating a sexual dysfunctional female patient
US10219898B2 (en) 2008-10-10 2019-03-05 Peter Forsell Artificial valve
US9072907B2 (en) 2008-10-10 2015-07-07 Peter Forsell Heart help device, system, and method
US9370656B2 (en) 2008-10-10 2016-06-21 Peter Forsell System, an apparatus, and a method for treating a sexual dysfunctional female patient
US9526649B2 (en) 2008-10-10 2016-12-27 Peter Forsell Method and instrument for treating obesity
US10583234B2 (en) 2008-10-10 2020-03-10 Peter Forsell Heart help device, system and method
US11123171B2 (en) 2008-10-10 2021-09-21 Peter Forsell Fastening means for implantable medical control assembly
US9949812B2 (en) 2009-07-17 2018-04-24 Peter Forsell Vaginal operation method for the treatment of anal incontinence in women
US10952836B2 (en) 2009-07-17 2021-03-23 Peter Forsell Vaginal operation method for the treatment of urinary incontinence in women
DE102009051805A1 (de) 2009-11-03 2011-05-05 Gambro Lundia Ab Dialysevorrichtungen mit Piezopumpen
DE102009051806A1 (de) 2009-11-03 2011-05-05 Gambro Lundia Ab Vorrichtung zur Unterstützung der Leberfunktion
EP2316502A1 (fr) 2009-11-03 2011-05-04 Gambro Lundia AB Dispositifs de dialyse
WO2013041703A1 (fr) * 2011-09-21 2013-03-28 Sanofi-Aventis Deutschland Gmbh Pompe péristaltique et procédé de transport d'un matériau à l'aide d'une pompe péristaltique
US10519946B2 (en) 2011-09-21 2019-12-31 Sanofi-Aventis Deutschland Gmbh Peristaltic pump and method of transporting material with a peristaltic pump
EP3450758A1 (fr) * 2017-08-28 2019-03-06 Vestel Elektronik Sanayi ve Ticaret A.S. Tuyau intelligent permettant d'éliminer une obstruction
CN111936195A (zh) * 2018-02-02 2020-11-13 麦克罗博医疗公司 具有自我监测能力的自清洁导管系统

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