Patent•
Suction canister with unitary shut-off valve and filter features
16 May 1983-
TL;DR: In this article, a unitary shut-off valve/filter element is associated with the interior side of the first opening, which is oriented within the receptacle so as to be contacted by liquid, which rises therein.
Abstract: A suction canister assembly comprises an enclosed receptacle having a first opening for providing suction to the receptacle and a second opening for drawing fluids, including liquids and gases, into the receptacle during suction. A unitary shut-off valve/filter element is associated with the interior side of the first opening. This element is oriented within the receptacle so as to be contacted by liquid in the receptacle which rises therein. The element is porous and is adapted to filter particulate matter from gas passing therethrough. In addition, the valve/filter element is capable of developing sufficiently high surface tension under liquid contact to serve as a barrier against liquid passage therethrough at pressure differentials across the element when vacuum is applied on one side of the element. As a result, the element is adapted to terminate suction through the suction opening when liquid rises in the receptacle to completely cover the element.
Citations
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Patent•
29 Nov 2000
TL;DR: A bandage has a first sheet overlying a wound and located adjacent to it and a top sheet overlaying the first sheet as discussed by the authors, where a plurality of discrete passageways overlying the wound and adapted to communicate negative pressure established by a negative pressure source.
Abstract: A bandage has a first sheet overlying a wound and located adjacent to it and a top sheet overlying the first sheet. The first sheet has a plurality of discrete passageways overlying the wound and adapted to communicate negative pressure established by a negative pressure source to the wound.
671 citations
Patent•
09 Sep 1998
TL;DR: In this paper, a wound therapy combination comprising a suction head and a surgical drape is presented, which consists of a planar flange portion and a tubular connector piece on a first face that communicates with an aperture extending to a second face.
Abstract: A wound therapy combination comprising a suction head and a surgical drape. The suction head comprises a planar flange portion and a tubular connector piece on a first face that communicates with an aperture extending to a second face. The second face is formed with projections that define flow channels for facilitating flow of liquids to the aperture.
591 citations
Patent•
20 Nov 2008TL;DR: In this paper, the authors described an apparatus for the application of topical negative pressure therapy to a wound site, consisting of a wound contacting element for retaining wound exudate fluid therein, wound covering element that provides a substantially airtight seal over the wound contact element and wound site; and a vacuum connection tube connecting a wound cavity to a vacuum source.
Abstract: Apparatus for the application of topical negative pressure therapy to a wound site is described, the apparatus comprising: a wound contacting element for retaining wound exudate fluid therein; a wound covering element that provides a substantially airtight seal over the wound contacting element and wound site; a vacuum connection tube connecting a wound cavity to a vacuum source; and a vacuum source connected to a distal end of the vacuum connection tube.
485 citations
Patent•
27 Nov 2001
TL;DR: In this article, a wound dressing member is provided for use in a vacuum bandage connected to a vacuum source, which includes a wound facing surface adapted to be in contact with and generally conform to the wound surface.
Abstract: A wound dressing member is provided for use in a vacuum bandage connected to a vacuum source. The wound dressing member is also provided for use with a wound having a wound surface. The wound dressing member includes a wound facing surface adapted to be in contact with and generally conform to the wound surface and a plurality of discrete holes formed in the wound facing surface. The member further includes a port configured to communicate with the vacuum source and with each hole formed in the wound facing surface. The wound dressing member further includes a stand-off having interconnected portions coupled to the wound facing surface and configured to provide a space between the wound facing surface and the wound surface.
471 citations
Patent•
28 Feb 2002
TL;DR: In this article, a blood gas transducer unit is adapted for application to a patient's skin and administration of a local vacuum at the area of patient application, in order to induce a condition of hyperperfusion in the locality of the transducers.
Abstract: A method and apparatus for the transcutaneous monitoring of blood gases generally comprises a blood gas data acquisition device, a vacuum source and a blood gas transducer unit. The blood gas transducer unit is adapted for application to a patient's skin and administration of a local vacuum at the area of patient application. It further comprises an electrochemical blood gas transducer, well known to those of ordinary skill in the art, which is disposed entirely within the local vacuum at the area of patient application. The vacuum source is placed in fluid communication with the blood gas transducer unit, through a hydrophobic membrane filter for safety purposes, in order to induce a condition of hyperperfusion in the locality of the electrochemical blood gas transducer. Under the control of a microcontroller, or equivalent means, the blood gas acquisition device is then utilized to capture a measure of skin surface oxygen or carbon dioxide pressure. The microcontroller can then utilize this measure to arrive at an estimate of arterial partial pressure of oxygen or carbon dioxide, accordingly. Because vacuum induced perfusion produces the requisite condition of hyperperfusion without local heating and, therefore, without acceleration of the local metabolic function, the present invention results in more accurate than previously available estimates of partial pressure blood gas pressures and does so while eliminating a significant risk for injury to the patient.
459 citations
References
More filters
Patent•
21 Jun 1977TL;DR: In this paper, a tetrafluoroethylene (TFL) polymer is presented in a porous form which has an amorphous content exceeding 5% and which has a micro-structure characterized by nodes interconnected by fibrils.
Abstract: This invention provides a tetrafluoroethylene polymer in a porous form which has an amorphous content exceeding about 5% and which has a micro-structure characterized by nodes interconnected by fibrils. The material has high porosity and high strength. It can be used to produce all kinds of shaped articles such as films, tubes, rods, and continuous filaments. Laminations can be employed and impregnation and bonding can readily be used to produce a large variety of articles. Compressed articles of very high strength can also be produced from these porous forms.
833 citations
Patent•
25 Aug 1972
TL;DR: In this article, an aspirator, a suction device for removing body fluids, is described, which includes two elongated tubes: one having a tapered end for insertion into body cavities via the nose or mouth for communication with body fluids; the other elongated tube having a mouthpiece, for mouth actuation, or a squeeze-bulb, for hand actuation.
Abstract: An aspirator, a suction device for removing body fluids, is disclosed. It includes two elongated tubes: one having a tapered end for insertion into body cavities via the nose or mouth for communication with body fluids; the other elongated tube having a mouthpiece, for mouth actuation, or a squeeze-bulb, for hand actuation. The free ends of the aforementioned elongated tubes are connected to a combination isolation and liquid-collection chamber. The chamber includes an elastic impregnable barrier against the transfer of potentially infective agents between patient and user. The chamber is constructed for venting gas and vapor components from the body fluid, as well as collecting the liquid component. For mouth actuation, the user holds the mouthpiece between his or her teeth while inserting the tapered end into the body cavity from which fluid is to be extracted. The user then seals his or her lips about the mouthpiece and alternately decreases and increases the volume of his or her mouth cavity as many times as required to extract the fluid sought. During hand operation, the user grips a squeeze-bulb in one hand and squeezes and releases same as many times as necessary to remove the sought after liquid.
150 citations
Patent•
16 Sep 1971TL;DR: In this paper, a disposable filter is provided that is especially suited for filtering gases, and for manufacture in a small size, comprising a housing in at least two portions defining therewith a fluid chamber with two fluid ports, and a filter element in sheet form extending across the fluid chamber and held at its sides to one housing portion across the line of flow between the fluid ports.
Abstract: A disposable filter is provided that is especially suited for filtering gases, and for manufacture in a small size, comprising a housing in at least two portions defining therewith a fluid chamber with two fluid ports, and a filter element in sheet form extending across the fluid chamber and held at its sides to one housing portion across the line of flow between the fluid ports, the housing portions being bonded together and the filter element being bonded to one housing portion in a fluid-tight and microorganism-tight seal.
85 citations
Patent•
01 May 1979
TL;DR: In this article, a medical suction system is provided for draining fluid from a patient area, which includes a fluid collection receptacle (12) having a suction port (34) connected to a vacuum source and a fluid receiving port (30) for receiving fluid from the patient area.
Abstract: A medical suction system is provided for draining fluid from a patient area. The system includes a fluid collection receptacle (12) having a suction port (34) connected to a vacuum source and a fluid receiving port (30) for receiving fluid from the patient area. A hydroscopic filter (10) is mounted between the fluid collection receptacle (12) and the vacuum source for absorbing and collecting fluid entrained in the air while continuously permitting the passage of air from the interior of the fluid collection receptacle (12) through the suction port (34) to the vacuum source.
70 citations
Patent•
07 Oct 1976
TL;DR: A suction collection system embodying a disposable drainage receiving assembly including a flexible plastic bag sealed to and depending from a lid for positioning within a rigid canister, the open upper end of the canister being sealed by the lid as mentioned in this paper.
Abstract: A suction collection system embodying a disposable drainage receiving assembly including a flexible plastic bag sealed to and depending from a lid for positioning within a rigid canister, the open upper end of the canister being sealed by the lid The lid includes a drainage fixture communicating with the interior of the bag A suction fixture, also on the lid, communicates with the canister exteriorly of the bag and with the interior of the bag through a restricted fluid path The suction fixture communication with the canister exteriorly of the bag can be either direct or through a well having a fluid path to the exterior of the bag and a set of apertures opening into the bag An air pervious-liquid impervious path is orientated solely between the suction fixture and the interior of the bag for an exclusion of liquid and a slight restriction of air flow relative to the flow from the canister exteriorly of the bag A seal, either a liquid level responsive disc or a compressible tube, will, upon the introduction of a sufficient level of liquid within the bag, terminate communication between the suction fixture and the interior of the bag
64 citations