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
  • A61M1/64—Containers with integrated suction means
  • A61M1/67—Containers incorporating a piston-type member to create suction, e.g. syringes
• • 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
  • A61M27/00—Drainage appliance for wounds or the like, i.e. wound drains, implanted drains

Definitions

• the invention relates to a wound drainage compris ⁇ ing a suction chamber, expandable under spring bias, for connection to a drainage catheter.
• Such wound drainages are used for the continuous removal of secretions which can collect in wounds after surgical operations.
• the suction chamber comprises a bellows which, when the wound drainage is to be applied, is compressed against the inherent spring bias of the bellows and is then left to expand slowly, causing a vacuum in the bellows and sucking in the secretion through the drainage catheter.
• the bellows At one end the bellows have a hose for connec ⁇ tion to the drainage catheter and at the other. end a hose for emptying the bellows of air or secretions which have collected therein, and the passage through both of these hoses can be closed off by means of a hose clamp.
• both hose clamps are engaged and the bellows are then connected with the drainage catheter.
• the co-nnection with the drainage catheter is then opened so that suction is exerted in the drainage catheter when the bellows try to expand as a result of their inherent spring bias.
• Emptying is undertaken by closing the passage to the drainage catheter, whilst the passage through the other hose on the bellows is opened, whereupon the bellows are compressed and the collected secretion is forced out through said 1 atter,-hose.
• a wound drainage of this known type is difficult to use and furthermore does not represent a closed system, so that there is ve ry considerable risk of the spread of infection to the surroundings when handling the wound drainage.
• Another known wound drainage comprises a vessel , normally a vacuum-moulded bottle or container with a ' hand-operated vacuum pump connected thereto.
• a certain vacuum can be brought about in the .contai ner by means of the vacuum pump, but as there can sub ⁇ sequently be a shock-like suction action on connection to the drainage catheter, which is not only uncomfort ⁇ able for the patient but can also be painful because of body tissue being sucked towards the inlet apertures of the drainage catheter, it is sometimes preferred to evacuate the container to a suitable vacuum when the wound drainage is applied.
• emptying of the con ⁇ tainer invol ves ' problems as regards the spread of bacteria to the surroundings.
• the object of the present invention is to provide a wound drainage of the type initially referred to comprising a suction chamber, expandable under spring bias, for connection to a drainage catheter, which is easy to bring into the operational state before it has to be applied to the patient, and which gives a mild suction action which does not cause the patient any discomfort. Furthermore, it is intended to provide by the invention a wound drainage of this type which is designed as a closed system so as to prevent the spread of bacteria to the surroundings when handling the wound drainage.
• Such a wound drainage is ve ry suitable for manufacture as a throw-away article at relatively low price, whereby the most stringent hygienic requirements can be satisfied. Furthermore, with the wound drainage in accordance with the invention it is possible to adapt in a simple manner the suction action imposed in the wound drainage to suit the conditions under which the wound drainage is to ba employed.
• FIG. 1 is a perspective view of the wound drainage in accordance with the invention.
• FIG. 2 is an axial sectional view, partially a side view, of the wound drainage in FIG. 1.
• the wound drainage illustrated in the drawing comprises a cylinder 10 which is preferably made from transparent plastic material. At one end, the cylinder is formed integrally with an end wall 11 which is pro- vided with a socket 12 for connection of a slide valve 13 of the embodiment described in the international application PCT/SE80/00019.
• the slide valve is designed to interact with a coupling element 14, also designed in accordance with said international application, and this coupling element is located on a drainage catheter 15 which is designed to be inserted into a wound and which has inlet apertures 16 for sucking up secretions from the wound through the catheter.
• a piston 17 is displaceable and this piston has sealing rings 18 to provide a seal against the inside of the cylinder wall .
• a rubber string 19 is fastened in an eye 20 on the piston 17 and is drawn out from the cylinder through a socket 21 on one end wall 22 which is located as a cover on the other end of the cylinder 10.
• the rubber string 19 passes between a " pair of clamping members 23 in the form of rollers or wedges, which permit the rubber string to be drawn out from the cylinder 10 through the socket 21 but which on the other hand lock the rubber string firmly to prevent movement into the cyl i nde .
• a thin tube-shaped plastics foil 24 is fastened at one end to the piston 17 and at the other end to the end wall 22 arranged as a cover.
• the piston 17 should be located close to the end wall 11, as shown in the drawing, and the slide valve 13 must be in the closed position.
• the rubber string 19 is tensioned by being drawn out to a certain extent through the socket 21, the piston being prevented from moving under the influence of the rubber string by virtue of the vacuum which forms between the piston and the end wall 11 when the slide valve 13 is closed.
• the rubber string is prevented from returning into the cylinder by the clamping members 23.
• the suction action can be easily increased by drawing out the rubber string 19 still further.
• the rubber string 19 is completely separated from the cylindrical space between the piston 17 and the end wall 11 which is being filled with wound secretions, so that bacteria from the wound secretions cannot come out from the cylinder via the rubber string 19 through the socket 21.
• the drainage catheter 15 can be connected to or disconnected from the cylinder 10 by means of the slide valve 13 and the coupling element 14 without any risk whatever that the secretions which pass through the drainage catheter into the cylinder will emerge at the coupling point.
• the plastics foil 24 also prevents secretions which might possibly be able to ooze past the piston 17 emerging from the cylinder via the rubber string 19 and socket 21.
• the wound drainage forms a completely closed system which absolutely prevents the spread of bacteria or contamination to the surroundings. Just as important is the fact that by virtue of the use of the slide valve 13 and the coupling element 14, the migra ⁇ tion of bacteria is prevented from the surroundings via the coupling element 14 and the catheter 15 to the wound which is being drained.
• the cylinder 10 When the cylinder 10 has become filled with secretions to the extent permitted by the tension of the rubber string 19, the cylinder 10 is disconnecte from the drainage catheter 15 and, since the wound drainage is of simple and cheap design, it can then be thrown away. Thus, it is not necessary to empty the wound drainage, with the hygienic risks which ar connected therewith. A new wound drainage is connect to the drainage catheter 15 in the manner described • previousl .
• the piston 1 which in the embodiment described here is relatively thick and provided with sealing rings 18, can be rep by a relatively thin disc and it is also possible to replace the rubber string 19 e.g. by a helical sprin which can be extended and tensioned in the same way the rubber string.
• Other connecting devices between the drainage catheter and the cylinder are feasible, but the arrangement in accordance with said interna- tional application is to be preferred, because when using this arrangement an absolutely sealed system i obtained.
• the material for the rubber string and its dimensions it is possible to achieve a spring rate o the rubber string such that the suction action in th wound drainage remains fairly constant throughout th major portion of the movement of the piston in the cylinder.
• the extended portion of the rubber string can be employed for hanging up the wou drainage during use.
• even a simple rubber band can be employed.
• the elastic stran whether this be a rubber string, a rubber band, or a helical spring, can be provided with graduations so that it is easily possible to adjust the strand to the desired bias, i.e. a predetermined collected amount of wound secretions.

Landscapes

• Health & Medical Sciences (AREA)
• Heart & Thoracic Surgery (AREA)
• Hematology (AREA)
• Engineering & Computer Science (AREA)
• Anesthesiology (AREA)
• Biomedical Technology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Vascular Medicine (AREA)
• Otolaryngology (AREA)
• External Artificial Organs (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=20339888

Family Applications (1)

Country Status (4)

Families Citing this family (9)

Family Cites Families (1)

• 1980
  • 1980-03-10 EP EP80900510A patent/EP0047236A1/en not_active Withdrawn
  • 1980-03-10 WO PCT/SE1980/000069 patent/WO1981002523A1/en not_active Application Discontinuation
  • 1980-03-10 JP JP55500591A patent/JPS57500227A/ja active Pending
• 1981
  • 1981-11-09 DK DK495181A patent/DK495181A/da not_active Application Discontinuation

Non-Patent Citations (1)

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