WO2010145775A1 - Mesure de pression dans un conduit flexible de dérivation - Google Patents

Mesure de pression dans un conduit flexible de dérivation Download PDF

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Publication number
WO2010145775A1
WO2010145775A1 PCT/EP2010/003486 EP2010003486W WO2010145775A1 WO 2010145775 A1 WO2010145775 A1 WO 2010145775A1 EP 2010003486 W EP2010003486 W EP 2010003486W WO 2010145775 A1 WO2010145775 A1 WO 2010145775A1
Authority
WO
WIPO (PCT)
Prior art keywords
wound
pressure
drainage line
measuring
therapeutic device
Prior art date
Application number
PCT/EP2010/003486
Other languages
German (de)
English (en)
Inventor
Dirk Baumann
Johannes Meyer
Original Assignee
Vcs Medical Technology Gmbh
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 Vcs Medical Technology Gmbh filed Critical Vcs Medical Technology Gmbh
Publication of WO2010145775A1 publication Critical patent/WO2010145775A1/fr

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
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/71—Suction drainage systems
    • A61M1/73—Suction drainage systems comprising sensors or indicators for physical values
    • 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
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/71—Suction drainage systems
    • A61M1/74—Suction control
    • 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
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
    • A61M1/91—Suction aspects of the dressing
    • A61M1/912—Connectors between dressing and drainage tube
    • 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
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
    • A61M1/96—Suction control thereof
    • A61M1/962—Suction control thereof having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction
    • 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
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
    • A61M1/96—Suction control thereof
    • A61M1/966—Suction control thereof having a pressure sensor on or near the dressing
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow
    • A61M2205/3344—Measuring or controlling pressure at the body treatment site

Definitions

  • the present patent application relates to a therapeutic device for promoting the healing of a wound, comprising a cover around the wound for forming a substantially airtight seal over the wound, wherein between the wound and cover preferably a liquid-permeable pad is arranged, the cover with the drainage line connecting the suction pump, so that it can be sucked at the wound to withdraw the liquids therefrom, and a connector for connecting the cover to the drainage line, the connector having a passage for connecting the proximal end of the drainage line to the wound Means are provided for measuring a pressure prevailing under the cover wound pressure.
  • Such wound healing devices are used to treat secondary healing chronic or acute wounds, especially in
  • a generic wound healing device is known from DE 10 2005 014420 A1, in which the measurement of a distal pressure prevailing at the distal end of the drainage tube is provided. According to the cited prior art, this measurement takes place substantially at the distal end of the drainage tube in the region of the collecting container.
  • the measurement at said measurement point for characterizing the pressure prevailing under the cover wound pressure is problematic with a disadvantage, because the measurement path covers the entire length of the drainage tube and can therefore be falsified by occurring in the course of the drainage tube effects such as blockages.
  • a generic wound healing device in which an additional line is provided, which connects the porous pad with a pressure detector.
  • the additional line By means of the additional line, according to the prior art, the pressure at the site of the wound should be monitored.
  • the pressure sensor may be arranged in the housing of the wound healing device.
  • a disadvantage of this known wound healing device is that it is comparatively complicated to provide an additional tubing in addition to the drainage line. Such a hose generally increases the complexity of the apparatus.
  • the main tube is used as a drainage tube and of which a side tube serves as a probe tube for pressure measurement.
  • the outer diameter of the hose connection between the housing and wound dressing is undesirably increased. It is also possible that the additional line clogged or z. B. is separated by kinking or otherwise from the pressure prevailing at the wound site pressure by throttling action. In such a case, the pressure measurement in the known therapy device would provide a false value, without this being due to a disturbance in the drainage tube or at the wound site. Accordingly, regulation of wound pressure would fail. Flow resistances, which occur due to different effects in the hose, make it difficult to disadvantageously dynamic pressure measurements with short measuring intervals.
  • this object is achieved in a generic therapeutic device in which the means for measuring a wound pressure with the drainage line are designed to communicate.
  • the pressure measurement is thus carried out neither under the cover immediately at the site of the wound, which has the disadvantages described above.
  • the pressure measurement does not take place at the distal end of the drainage tube, but rather advantageously at the drainage line itself, that is, as it were, between the mentioned measurement points.
  • a sufficiently direct measurement of the pressure conditions at the site of the wound is advantageously ensured.
  • a measurement of this averaged pressure is therefore ideal as a control input for the pressure control of wound pressure.
  • the means for measuring a wound pressure comprise a branched out from the drainage line probe line. Within the probe conduit, further relaxation of any random, short-term pressure fluctuations can be ensured. It is advantageous to obtain a physically smoothed measurement signal. In addition, the measurement is advantageously carried out at a location that is not necessarily located directly on the drainage tube. Depending on the position of the patient, it is possible in particular to prevent movement artifacts during the measurement.
  • a pressure measuring section for measuring the wound pressure is at most 50 cm, preferably between 20 cm and 30 cm, to the wound, in a preferred embodiment of the invention it is ensured that systematic measurement errors due to effects occurring within the drainage line are largely ruled out , With pressure measuring section is in this sense, the distance of a pressure transducer meant to the wound, measured along the drainage tube.
  • branching element is provided with a connection opening for producing a communicating connection with a probe line in the drainage line.
  • the branching element can in particular be provided with three mutually communicating outlets, wherein two outlets can be used to carry out the drainage line and the third outlet serves to connect the probe duct according to the invention.
  • the branch element is provided with means for attachment to the body of a patient.
  • a cross-sectional area of the connection opening is oriented parallel to a cross-sectional area of the drainage line in the region of the branching element.
  • a probe line can be guided parallel to the drainage line in this way.
  • the filter element ensures that no wound secretion can enter the probe tube.
  • the means for measuring the wound pressure remain sterile and can therefore be used repeatedly.
  • the means for measuring a wound pressure comprise an electrical transducer, wherein the transducer is arranged in a housing with an inlet opening for producing a communicating with the drainage line connection and an electrical output terminal for outputting a measurement signal.
  • the measurement signal can be transmitted in this way via an electrical cable or wirelessly to a control device for wound pressure.
  • the housing element comprises a removable closure for the pressure-tight closing of a transducer comprising the pressure chamber.
  • the housing element may be configured, for example, cylindrical. This can be an end to
  • a probe line that communicates with the drainage line to be configured.
  • Inside the cylindrical housing may be the pressure transducer, with the rear end of the cylindrical pressure measuring chamber being formed by the removable closure.
  • the closure By the closure is designed to be removable, the pressure transducer z. B. for maintenance or repair or replacement.
  • the housing element may be provided in an advantageous embodiment of the invention with means for securing a drainage line.
  • a clamping receptacle may be provided. A fixation of the housing to the drainage line is thus made possible with advantage.
  • the drainage line is in a section between the connector and the probe line and / or in a portion between the connector and the branch element with a, in particular by means of a bayonet closure, separable connecting element.
  • Figure 1 a perspective overall view of a
  • Vacuum therapy system according to the invention
  • Figure 2 a detailed view of an inventive
  • FIG. 3 shows a detailed view of a branch element of the vacuum therapy system according to the invention from FIG. 1 in different views.
  • FIG. 1 shows an overall view of a vacuum therapy system 1 in a perspective view.
  • the vacuum therapy system 1 according to the invention consists essentially of a control unit 2, a drainage line 3, a wound cover 4, a collecting container 5 and a pressure measuring system 6.
  • the structure of the wound cover 4 is designed in a conventional manner such that one in Figure 1 only schematically represented wound 7 an airtight seal is generated. In this area of the airtight cover of the wound 7, the drainage tube 3 is guided via a connector 8. About the arranged in the control unit 2, not shown pump is sucked by the drainage line 3 in the wound 7 resulting wound secretions.
  • a negative pressure is generated under the wound cover 4.
  • This negative pressure is measured with the pressure measuring system 6.
  • the measured pressure serves as input for a pressure control implemented in the control unit 2.
  • As a manipulated variable for the pressure control is essentially the pump.
  • the basic principle of vacuum therapy is well known, for. B. from the above-cited prior art.
  • the drainage line 3 comprises a branch piece 9, which is described in detail with reference to Figure 3.
  • the branch piece 9 comprises three connection points 10, 11, 12. Connection points 10, 11 serve to pass the drainage line 3 through the branch piece 9. All connection points 10, 11, 12 communicate with each other via connection channels 13 in the interior of the branch piece 9.
  • the connection point 12 serves for Connecting a probe tube 14, as shown in Figure 1 can be seen.
  • the probe tube 14 communicates by connecting to the junction 12 of the branch piece 9 in the drainage line 3 via the connecting channel 13 in the interior of the branch piece 9 with the drainage line 3.
  • the branch piece 9 is in the drainage line 3 at a distance 15 of about 20 to 30 cm from of the Wound 7 arranged. In the case of a substantially rectilinear guidance of the drainage line 3, the distance 15 approximately denotes the length of the section of the drainage line 3 between the branch piece 9 and the wound 7.
  • a bayonet fitting 16 is installed which allows the drainage line 3 and all adjoining elements of the vacuum therapy system 1 to be detached from the wound cover 4 without them to remove.
  • part (a) of Figure 3 shows an overall perspective view of the branch element 9 with the connection points 10, 11, 12. Also visible is a base plate 17, on soft the built-up of the connection points 10, 11, 12 and the inner connecting channel 13 branch region of the branch piece 9 is placed centrally.
  • the base plate 17 is inclined in a V-shape.
  • the V-shape of the base plate 17 facilitates the attachment of the branch piece 9 to the body of a patient.
  • Part (b) of Figure 3 shows a plan view of the branch piece 9.
  • Figure 3 (c) is a section along the line C - C of Figure 3 (b) is shown, which in particular shows the inner connecting channel 13, which
  • connection points 10, 11, 12 ensures each other.
  • FIGS. 3 (a) and 3 (c) it can be seen that the connection point 12 above the connection points 10, 11, which the Perform drainage line 3, is arranged.
  • FIG. 3 (e) illustrates that the branch piece 9 is constructed in such a way that the connection point 12 is rotatably mounted on the unit consisting of the connection points 10, 11.
  • FIG. 3 (e) shows that a filter element 18 is arranged in the connection channel 13 in such a way that a section 13 a of the connection channel 13 which communicates with the connection point 12 is separated from the channel sections 13 b, 13 c which communicate with the connection points 10 and 10, respectively 11. communicate directly, is disconnected.
  • FIG. 2 shows details of a pressure measuring housing 19 in different views.
  • 2 (c) shows a lateral view of the pressure measuring housing 19.
  • the pressure measuring housing 19 adjoins the probe hose 14.
  • the probe tube 14 is connected to the
  • Pressure measuring housing 19 connected via a bayonet fitting 20.
  • the pressure measuring housing 19 has a cylindrical basic shape.
  • a signal cable 21 is connected at the opposite end of the probe tube 14 of the pressure measuring housing 19.
  • the signal cable 21 is connected to the controller 2 to a
  • the sectional view along the line E - E in FIG. 3 (c) according to FIG. 2 (e) further shows that the cylindrical measuring section 22 of the pressure measuring housing 19 has a mouth-like attachment 23 at the bottom for attachment to the drainage line 3.
  • Fig. 2 (a) is a sectional view taken along the line A - A in the plan view of Fig. 2 (b). It can be seen in the sectional view that a cylindrical pressure measuring chamber 24 adjoins the probe tube 14 in the interior of the cylindrical measuring section 22. In the cylindrical pressure measuring chamber 24 is a pressure measuring board 25 installed. The pressure measuring board contains the well-known in the art electronic switching modules and Druckmessdeemiata such. B. piezoelectric to convert a pressure into a pressure characterizing electrical signal.
  • the cylindrical pressure measuring chamber 24 is closed at the end opposite the probe tube 14 with a stopper 26.
  • the stopper 26 is constructed of two perforated discs 27 axially offset in parallel, which are connected to one another via two connecting pins which are not visible in FIG.
  • the stopper 26 serves for the airtight sealing of the cylindrical pressure measuring chamber 24. This effect is obtained by the stopper 26 by an airtight filling compound 28 in the region between the two perforated discs 27 in which the signal cable 21 is poured.
  • a preferred embodiment of a therapeutic device according to the invention for promoting the healing of a wound, which allows a measurement of the pressure prevailing in the region of the wound 7 below the wound cover 4, is thus disclosed with reference to FIGS. 1 to 3.
  • the measurement of this pressure is made at the end of a branching off of the drainage line 3 probe line 14, wherein the diversion takes place in a pressure measuring section 15 of at most 50 cm, in particular between 20 and 30 cm.
  • the measurement in such a branch probe line 14 avoids the disadvantages of a pressure measurement immediately below the connector 8 of the wound cover 4 on the one hand and the disadvantages of a remote pressure measurement, for example in the region of the collecting container 5.

Abstract

Pour proposer un appareil thérapeutique (1) qui favorise la cicatrisation d'une lésion (7) et qui comprend un recouvrement (4) qui entoure la lésion (7) pour former au-dessus de la lésion (7) une fermeture essentiellement étanche à l'air, un coussinet perméable aux liquides étant de préférence disposé entre la lésion (7) et le recouvrement (4), un conduit de drainage (3) qui relie le recouvrement (4) à une pompe aspirante de telle sorte qu'une aspiration puisse être créée sur la lésion (7) pour en retirer les liquides et un raccord qui relie le recouvrement (23) au conduit de drainage (20), le raccord (8) présentant un passage qui relie l'extrémité proximale du conduit de drainage (3) à la lésion (7), des moyens (6, 14) étant prévus pour mesurer la pression qui règne dans la lésion en dessous du recouvrement (4) en améliorant la mesure de la pression qui règne dans la lésion, l'invention propose de configurer les moyens (6, 14) de mesure de la pression qui règne dans une lésion de telle sorte qu'ils communiquent avec le conduit de drainage (3).
PCT/EP2010/003486 2009-06-16 2010-06-10 Mesure de pression dans un conduit flexible de dérivation WO2010145775A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009025004A DE102009025004A1 (de) 2009-06-16 2009-06-16 Druckmessung im Abzweigschlauch
DE102009025004.2 2009-06-16

Publications (1)

Publication Number Publication Date
WO2010145775A1 true WO2010145775A1 (fr) 2010-12-23

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ID=42664870

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/003486 WO2010145775A1 (fr) 2009-06-16 2010-06-10 Mesure de pression dans un conduit flexible de dérivation

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DE (1) DE102009025004A1 (fr)
WO (1) WO2010145775A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4302640A (en) * 1979-11-07 1981-11-24 Bourns Medical Systems, Inc. Flow detector
US20080071234A1 (en) * 2006-09-19 2008-03-20 Kelch Randall P Reduced pressure treatment system having blockage clearing and dual-zone pressure protection capabilities
EP1920791A2 (fr) * 1999-11-09 2008-05-14 KCI Licensing Inc. Dispositif d'aspiration des plaies doté d'un connecteur à plusieurs lumières
WO2009071926A1 (fr) * 2007-12-06 2009-06-11 Smith & Nephew Plc Appareil et méthode pour thérapie à pression négative topique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9523253D0 (en) * 1995-11-14 1996-01-17 Mediscus Prod Ltd Portable wound treatment apparatus
GB2390157B (en) * 2002-06-25 2005-09-28 Johnson & Johnson Medical Ltd Wound fluid collecting and indicating device
DE102005014420A1 (de) 2005-03-24 2006-09-28 Inmeditec Medizintechnik Gmbh Vakuumtherapievorrichtung
DE102005015878A1 (de) 2005-04-06 2006-10-12 Inmeditec Medizintechnik Gmbh Schlauchanschluss für Vakuumtherapiegerät
US20080243096A1 (en) * 2006-10-05 2008-10-02 Paul Svedman Device For Active Treatment and Regeneration of Tissues Such as Wounds

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4302640A (en) * 1979-11-07 1981-11-24 Bourns Medical Systems, Inc. Flow detector
EP1920791A2 (fr) * 1999-11-09 2008-05-14 KCI Licensing Inc. Dispositif d'aspiration des plaies doté d'un connecteur à plusieurs lumières
US20080071234A1 (en) * 2006-09-19 2008-03-20 Kelch Randall P Reduced pressure treatment system having blockage clearing and dual-zone pressure protection capabilities
WO2009071926A1 (fr) * 2007-12-06 2009-06-11 Smith & Nephew Plc Appareil et méthode pour thérapie à pression négative topique

Also Published As

Publication number Publication date
DE102009025004A1 (de) 2011-01-20

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