Systems and methods for managing pneumatic pathways in an integrated multi-layer wound dressing

Abstract

The present invention discloses a system for providing infusion fluid to a deep abdominal wound, the system comprising an infusion module and a connection structure. The infusion module defines a first surface and a second surface facing the abdominal contents. The infusion module comprises a distribution hub configured to receive infusion fluid from an infusion fluid source. The connection structure comprises a first surface, a second surface facing the abdominal contents; and a flow path extending between the first surface and the second surface. The flow path comprises an inlet configured to receive an infusion fluid conduit engaged with the infusion fluid source and an outlet in fluid communication with the infusion module. The flow path defines an axis extending between the inlet and the outlet. The flow path is configured to compress in a direction defined by the axis.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority to U.S. Provisional Application No. 62 / 674,970, filed May 22, 2018, which is incorporated herein by reference in its entirety. Background Art

[0003] The present disclosure relates generally to wound treatment systems, and more particularly to wound treatment systems configured to provide instillation therapy and negative pressure wound therapy to fascial incisions in deep abdominal incisions.

[0004] Instillation therapy is a type of wound treatment that involves applying a therapeutic fluid (e.g., saline solution, prescription solution, antibiotics, cleaning fluid, etc.) to the treatment site to promote wound healing and granulation growth, prevent the wound from drying out, prevent the wound from becoming infected by bacteria, and / or treat the infected treatment site. Some instillation systems include an instillation fluid container and an instillation pump for providing instillation fluid to the treatment site. Instillation therapy can be used in combination with NPWT or can be used alone.

[0005] Negative pressure wound therapy (NPWT) is a type of wound therapy that involves applying negative pressure (pressure below atmospheric pressure) to a treatment site to promote wound healing. NPWT applies negative pressure to a wound to drain fluid from the wound as it heals. Some NPWT systems include a pump for maintaining the treatment site at a negative pressure by removing wound exudate from the treatment site. Wound exudate is typically directed to a tank or other container fluidly connected to the pump, where it is stored until emptied by the user.

[0006] Both drip therapy and NPWT can be used to treat deep abdominal wounds caused by laparotomy, which is used to gain access to the abdominal cavity for surgical procedures and / or to relieve intra-abdominal pressure by distending the intestine. In some cases, the laparotomy incision is not closed immediately, resulting in an "open abdomen", and drip and / or NPWT can be used to treat the open abdomen. For example, drip fluids can be used to irrigate the open abdomen, thereby preventing the abdominal contents from drying out, and can also be used to periodically flush the open abdomen to potentially reduce the possibility of sepsis. However, manual flushing may result in injuries that require further surgery.

[0007] Infusion and negative pressure systems suitable for treating an open abdominal cavity are often complex because of the need to maintain fluidly separate infusion and NPWT pathways, and it may be difficult to identify the fluidly separate infusion and NPWT pathways in a wound treatment system deployed in a patient. In addition, the wound treatment system may expand and contract during cycles of infusion and NPWT, making it difficult to maintain a fluid-tight seal on the infusion and NPWT pathways. In addition, a hard infusion connector and / or NPWT connector may contact the patient or otherwise cause discomfort to the patient during connection of the infusion connector and / or NPWT connector or during compression that occurs during NPWT. Summary of the invention

[0008] A specific implementation of the present disclosure is a system for providing infusion fluid to a deep abdominal wound, the system comprising an infusion module and a connection structure. The infusion module defines a first surface and a second surface facing the abdominal contents. The infusion module includes a distribution hub configured to receive infusion fluid from an infusion fluid source. The connection structure includes a first surface, a second surface facing the abdominal contents; and a flow path extending between the first surface and the second surface. The flow path includes an inlet configured to receive an infusion fluid conduit engaged with the infusion fluid source and an outlet in fluid communication with the infusion module. The flow path defines an axis extending between the inlet and the outlet. The flow path is configured to compress in a direction defined by the axis.

[0009] Another specific implementation of the present disclosure is a connection structure for providing an instillation fluid to a deep abdominal wound. The connection structure includes a first surface, a second surface facing the abdominal contents, and a flow path extending between the first surface and the second surface. The flow path includes an inlet configured to receive an instillation fluid conduit engaged with an instillation fluid source and an outlet configured to be in fluid communication with an instillation module that can be positioned in a deep abdominal wound. The flow path defines an axis extending between the inlet and the outlet. The flow path is configured to compress in a direction defined by the axis.

[0010] Another specific implementation of the present disclosure is a system for providing a drip fluid to a deep abdominal wound. The system includes a sealing member and a wound dressing. The sealing member defines a first surface and a second surface facing the abdominal contents. The sealing member is configured to form a fluid-tight seal around the periphery of the deep abdominal wound. The wound dressing includes a drip module, a drip catheter, and a sealing plate. The drip module defines a first surface and a second surface facing the abdominal contents. The drip module includes a distribution hub portion configured to receive a drip fluid from a drip fluid source. The drip catheter includes a first end in fluid communication with the drip module and a second end configured to be in fluid communication with the drip fluid source. The sealing plate includes a drip catheter passage extending from the drip fluid plate. The sealing plate is configured to receive a drip catheter therethrough. The sealing plate can be fixed to the first surface of the sealing member.

[0011] Another specific implementation of the present disclosure is a connection system for providing drip therapy and negative pressure therapy to deep abdominal wounds. The connection system includes a drip module, a negative pressure manifold and a connection plate. The drip module defines a first surface and a second surface facing the abdominal contents. The drip module includes a distribution hub portion, which includes a drip inlet of a drip catheter configured to engage a drip fluid source. The negative pressure manifold includes a first surface and a second surface facing the abdominal contents. The connection plate is fixed to the negative pressure manifold and includes a drip inlet connector and a negative pressure inlet connector, the drip inlet connector having a first shape that is fluidly connected to the drip inlet of the drip module, and the negative pressure inlet connector having a second shape different from the first shape. The negative pressure inlet connector is fluidly connected to the negative pressure manifold.

[0012] Those skilled in the art will appreciate that the inventive content is only exemplary and is not intended to be limiting in any way. As limited only by the claims, other aspects, inventive features and advantages of the devices and / or processes described herein will become apparent in the specific embodiments described herein and in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a cross-sectional view of a wound treatment system according to some embodiments.

[0014] Figure 2 According to some embodiments Figure 1 A perspective view of a connection system for use with a wound therapy system.

[0015] Figure 3 According to some embodiments Figure 1 A perspective view of a connection system for use with a wound therapy system.

[0016] Figure 4

[0013] A drip fluid conduit for use with a wound treatment system according to some embodiments.

[0017] Figure 5 According to some embodiments, Figure 4 Cross-sectional view of a wound therapy system with an instillation fluid conduit.

[0018] Figure 6 According to some embodiments, Figure 4 A perspective view of a wound therapy system with an instillation fluid conduit.

[0019] Figure 7 is a perspective view of an instillation fluid conduit for use with a wound treatment system, according to some embodiments.

[0020] Figure 8 According to some embodiments, Figure 7 Cross-sectional view of a wound therapy system with an instillation fluid conduit.

[0021] Fig. 9 is a perspective view of an infusion module with an integrated infusion fluid connection interface according to some embodiments.

[0022] Fig.10 According to some embodiments, Fig. 9 A perspective view of the infusion module of a wound therapy system.

[0023] Fig.11 is a perspective view of an infusion module with an integrated infusion fluid connection interface according to some embodiments.

[0024] Fig.12 According to some embodiments, Fig.11 A perspective view of the infusion module of a wound therapy system.

[0025] Fig.13 is a perspective view of a drip connection sealing system for a wound treatment system, according to some embodiments.

[0026] Figures 14 to 16 A process of securing a drip connection sealing system to create a fluid-tight seal is shown.

[0027] Fig.17 A perspective view of a wound treatment system including a drip connection sealing system is shown. DETAILED DESCRIPTION

[0028] Overview

[0029] Referring generally to the accompanying drawings, there is shown a wound treatment system having an instillation and negative pressure wound therapy (NPWT) system and components thereof according to various exemplary embodiments. The wound treatment system may include a wound dressing, an instillation system, and an NPWT system. The wound treatment system may include: an instillation module for delivering an instillation fluid to a treatment site; a negative pressure manifold for providing NPWT to a treatment site; a connecting plate for facilitating connection of instillation system components and / or NPWT system components to a wound dressing; and a sealing member for forming a substantially fluid-tight seal around a treatment site. The wound treatment system is configured to include an instillation flow path that is fluidly separated from the NPWT flow path. The instillation system may include an instillation fluid source and an instillation pump. The NPWT system may include a negative pressure source and a fluid collection container. The phrase "negative pressure" means a pressure that is less than ambient or atmospheric pressure.

[0030] In some embodiments, the connection plate is configured to facilitate connection of the drip system components to the wound dressing system and to facilitate connection of the NPWT system components to the wound dressing system. For example, the connection plate may include a drip inlet having a first shape and an NPWT inlet having a second shape different from the first shape. The drip system may include a drip catheter pad that is configured to engage the drip inlet but not the NPWT inlet. The NPWT system may include an NPWT catheter pad that is configured to engage the NPWT inlet but not the drip inlet.

[0031] In some embodiments, the negative pressure manifold is configured to include a drip flow path that is fluidly connected to the drip module. The drip flow path is separated from the negative pressure manifold fluid so that the drip fluid flowing along the drip flow path does not flow into the negative pressure manifold. In some embodiments, the drip flow path is configured to expand and compress with the negative pressure manifold during the cycle of NPWT. In some embodiments, the drip flow path may be a bellows structure made of a material impermeable to the drip fluid, which is positioned in a through hole in the negative pressure manifold. The bellows structure may be configured to extend or retract to accommodate different thicknesses and / or materials of the negative pressure manifold. In some embodiments, the drip flow path is made of the same material as the negative pressure manifold, so that the drip flow path has substantially the same compression and expansion as the negative pressure manifold during the cycle of NPWT. In such embodiments, the first surface, the second surface facing the abdominal contents, and the flow path (e.g., a channel) formed in the drip flow path are coated with a material impermeable to the drip fluid. The first surface is secured to the connection plate or sealing member in a fluid tight connection and the second surface is secured to the drip module proximate an inlet of the drip module in a fluid tight connection to create a drip flow path fluidly separate from the NPWT flow path.

[0032] In some embodiments, the infusion module includes an integrated infusion conduit. The integrated infusion conduit can be wrapped on one side of the negative pressure manifold to abut the sealing member and / or pass through the negative pressure manifold. The integrated infusion conduit can be made of a tubing material that is impermeable to the infusion fluid, or can be positioned in an envelope that is impermeable to the infusion fluid.

[0033] In some embodiments, the drip module may include an integrated drip catheter engaged with a sealing system for forming a substantially fluid-tight seal around a hole in a sealing member that receives the integrated drip catheter. In order to deploy the drip module and the sealing system, the drip module may be positioned in a treatment site so that the drip module substantially covers the contents of the abdomen. The drip catheter then surrounds or passes through the negative pressure manifold and then through the hole in the sealing member. A sealing plate with a drip catheter passage then slides along the drip catheter until the sealing plate abuts the sealing member. The sealing plate is then fixed to the sealing member using an adhesive. A locking collar is frictionally fitted around the outer surface of the drip catheter passage to form a substantially fluid-tight seal between the drip catheter passage and the drip catheter.

[0034] Additional features and advantages of the wound treatment system are described in detail below.

[0035] Wound therapy system

[0036] See also Figure 1 , a cross-sectional view of a wound treatment system 10 is shown according to an exemplary embodiment. In the illustrated embodiment, the wound treatment system is configured to treat the abdominal cavity and is discussed in the context of treating an open abdominal cavity. The wound treatment system 10 can be used to treat "open abdominal" conditions, in which a deep abdominal wound is left open for a period of time. The components described herein can be used in different configurations of an instillation therapy system and / or a negative pressure wound therapy (NPWT) system. The phrase "negative pressure" means a pressure that is less than ambient or atmospheric pressure.

[0037] In various embodiments, the wound treatment system 10 can be used to treat deep abdominal incisions. The wound treatment system 10 includes a wound dressing 14, an instillation system 22, and an NPWT system 26. The wound dressing 14 includes an abdominal treatment device 28, an instillation module 30, a negative pressure manifold 34, a sealing member 38, and an optional connection plate 42 ( Figure 5 ). The wound dressing 14 is intended to be engaged with a treatment site of a patient, such as the patient's abdominal cavity. The wound treatment system 10 can be used with the NPWT system 26 and / or the drip system 22. The NPWT system 26 can include a negative pressure source 46 (such as a pump) and a fluid collection chamber 50. The drip system 22 can include a drip fluid source 54. In some embodiments, the drip system 22 can include a mounted pump 56.

[0038] Abdominal treatment device

[0039] See also Figure 1 , the abdominal treatment device 28 is shown to include a first layer 57, a second layer 61, and a foam spacer 65. The second layer 61 faces the abdominal contents and is generally opposite to the first layer 57. The foam spacer 65 includes a first surface 67 and a second surface 69 facing the abdominal contents. The foam spacer 65 includes a hub 71 and a plurality of leg members 73 extending generally radially from the hub 71. The hub 71 includes a through opening 75 for receiving at least a portion of the infusion module 30. The foam spacer 65 is generally in fluid communication with the negative pressure conduit 138 to receive negative pressure from the negative pressure source 46 and to receive fluid flowing from the treatment site toward the negative pressure source 46. The plurality of elongated legs 73 are configured to distribute the negative pressure throughout the treatment site. As shown in FIG. Fig.12 As shown, the first layer 57 and the second layer 61 encapsulate the leg members 73, the hub 71 and the intermediate space between the adjacent leg members 73. In the illustrated embodiment, the hub 71 and the plurality of leg members 73 are made of a substantially hydrophobic material and are configured to be used for fluid flow under substantially atmospheric pressure conditions and negative pressure conditions. In some embodiments, the hub 71 and the plurality of leg members 73 are made of a reticulated foam, such as the reticulated foam described below for the negative pressure manifold 34. In some embodiments, the leg members 73 can be cut to accommodate relatively small wounds. The first layer 57 and the second layer 61 of the abdominal treatment device 28 can be made of a material that is impermeable to fluid and is intended not to stimulate the patient's fascia and internal organs. The abdominal treatment device 28 may include a plurality of window holes 77 (e.g., negative pressure inlets) for distributing negative pressure by a plurality of leg members 73 and / or allowing fluid to flow into the plurality of leg members 73 and / or the space between the plurality of leg members 73 and the layers 57, 61. The window hole 77 may include a through hole, a slit or a linear incision. The cross-section of the window hole 77 may be circular, rectangular, polygonal or any other shape.

[0040] Infusion module

[0041] See also Figure 1, the drip module 30 is shown to include a first layer 58, a second layer 62, and a fluid distribution layer 66. The second layer 62 faces the abdominal contents and is generally opposite to the first layer 58. The fluid distribution layer 66 includes a first surface 68 and a second surface 70 facing the abdominal contents. The fluid distribution layer 66 includes a fluid distribution hub 72 and a plurality of fluid distribution structures 74 extending generally radially from the fluid distribution hub 72. The fluid distribution hub 72 is generally in fluid communication with the drip conduit 130 to receive the drip fluid, and is in fluid communication with the fluid distribution structures to distribute the drip fluid to the fluid distribution structures 74. For example, the first layer 58 may include an opening 76 (e.g., a drip inlet) proximate the fluid distribution hub 72 for providing fluid communication between the fluid distribution hub 72 and the drip connection structure. The first layer 58 and the second layer 62 are welded together along at least a portion of the edges of the first layer 58 and the second layer 62 to encapsulate the fluid distribution layer 66. In some embodiments, the first layer 58 and the second layer 62 encapsulate the fluid distribution structures 74 and the fluid distribution hub 72, but do not encapsulate the intervening spaces between adjacent fluid distribution structures 74 ( Figure 5 ). In the illustrated embodiment, the fluid distribution hub 72 and the plurality of fluid distribution structures 74 are made of a substantially hydrophobic material and are configured for fluid flow under substantially atmospheric pressure conditions and under negative pressure conditions. In some embodiments, the fluid distribution hub 72 and the plurality of fluid distribution structures 74 are made of a reticulated foam, such as the reticulated foam described below for the negative pressure manifold 34. In some embodiments, the fluid distribution structures 74 can be cut to fit relatively small wounds.

[0042] In other embodiments, the first layer 58 and the second layer 62 may be made of a material that is impermeable to fluid and is intended not to irritate the patient's fascia and internal organs. As described in detail below, in such embodiments, the first layer 58 and the second layer may be fluid distribution layers and include a plurality of fenestrations 78 (e.g., drip outlets) for distributing drip fluids from a plurality of fluid distribution structures 74. The fenestrations 78 may include through holes, slits, or linear cuts. The cross-section of the fenestrations 78 may be circular, rectangular, polygonal, or any other shape.

[0043] Negative pressure manifold

[0044] See also Figure 1 to Figure 2, the negative pressure manifold 34 is shown to include a first surface 82 and a second surface 86 facing the abdominal contents opposite to the first surface 82. When the negative pressure manifold 34 is applied to the treatment site, the first surface 82 faces away from the abdominal contents, while the second surface 86 faces the abdominal contents. In some embodiments, the first surface 82 of the negative pressure manifold 34 contacts the second surface 86 of the sealing member 38. In some embodiments, the negative pressure manifold 34 may include perforations 90 to facilitate removal of a portion of the negative pressure manifold 34, thereby adapting to wounds of different sizes. In some embodiments, the second surface 86 of the negative pressure manifold 34 contacts the drip module 30. The negative pressure manifold 34 is suitable for wicking fluid (e.g., exudate) from the wound, and includes an in-mold manifold structure for distributing negative pressure throughout the negative pressure manifold 34 during the negative pressure wound therapy treatment. The negative pressure manifold 34 is made of a material that allows fluid and / or negative pressure to pass between at least a first portion of the negative pressure manifold 34 and a second portion of the negative pressure manifold 34. In some embodiments, negative pressure manifold 34 may include molded-in flow channels or passages that can distribute fluids provided to and removed from the manifold. In some embodiments, the molded-in flow channels or passages can be formed by cells in a porous foam material.

[0045] The negative pressure manifold 34 can be made of a porous and permeable foam-like material, and more specifically, a reticulated open-cell polyurethane or polyether foam that allows good permeability of wound fluid under reduced pressure. One such foam material that has been used is available from Kinetic Concepts, Inc. (KCI), San Antonio, Tex. Materials. Any material or combination of materials may be used for the negative pressure manifold 34, provided that the negative pressure manifold 34 is operable to distribute reduced pressure and provide a distributed compressive force along a treatment site.

[0046] Materials with mesh openings in the range of about 400 microns to 600 microns are preferred, but other materials may be used. Absorbent layer materials (e.g. The density of the material is usually about 1.3 lb / ft 3 Up to 1.6 lb / ft 3 (20.8kg / m 3 Up to 25.6kg / m 3 ). In some cases, A material with a higher density (smaller pore size) may be desirable. For example, Materials or density greater than 1.6 lb / ft 3 (25.6kg / m 3). For example, you can use Materials or density greater than 2.0 lb / ft 3 (32kg / m 3 ) or 5.0lb / ft 3 (80.1kg / m 3 ) or even larger similar materials. The denser the material, the higher the compressive force that can be generated for a given reduced pressure. If a foam with a density less than the tissue at the tissue site is used as the absorbent layer material, a lifting force can be created. In an exemplary embodiment, a portion of the wound dressing (e.g., the edge) can apply a compressive force, while another portion (e.g., the center portion) can provide a lifting force.

[0047] The absorbent layer material may be a reticulated foam that is subsequently felted to a thickness of about one third (1 / 2) the original thickness of the foam. Among many possible absorbent layer materials, the following may be used: Materials or Technical Foams (www.foamex.com). In some cases, it may be desirable to add ionic silver to the foam during the micro-bonding process or to add other substances such as antimicrobial agents to the absorbent layer material. The absorbent layer material may be isotropic or anisotropic, depending on the exact orientation of the compressive force required during the application of reduced pressure. The absorbent layer material may also be a bioabsorbable material.

[0048] Sealing components

[0049] See again Figure 1 , the sealing member 38 is shown to include a first surface 94 and a second surface 98 facing the wound opposite to the first surface 94. When the wound treatment system 10 is applied to the wound, the first surface 94 faces away from the wound and the second surface 98 faces the wound. Figure 1 As shown, at least the periphery of the second surface 98 includes an adhesive. The adhesive is intended to secure the sealing member 38 to the patient's skin and form a fluid-tight seal around the incision. The sealing member 38 also provides a barrier to prevent microorganisms from passing through the wound treatment system 10.

[0050] In some embodiments, the sealing member 38 is an elastomeric material or any material that can provide a fluid seal. "Fluid seal" means a seal that is sufficient to maintain pressure at a desired location, taking into account the specific reduced pressure subsystem involved. The term "elastomer" means having the properties of an elastomer, and generally refers to a polymer material with rubber-like properties. Examples of elastomers may include, but are not limited to, natural rubber, polyisoprene, styrene-butadiene rubber, chloroprene rubber, polybutadiene, nitrile rubber, butyl rubber, ethylene-propylene rubber, ethylene-propylene-diene monomer, chlorosulfonated polyethylene, polysulfide rubber, polyurethane, EVA film, copolyester, thermoplastic polyurethane (TPU), and opportunities. As non-limiting examples, the sealing member 38 may be made of silicone, 3M The sealing member 38 can be formed of a material of a sterile drape material, an acrylic sterile drape material (such as one available from Avery), or an incise sterile drape material. In some embodiments, the sealing member 38 can be at least partially transparent to facilitate viewing of the wound treatment system 10 through the sealing member 38, as described in detail below.

[0051] The sealing member 38 may be substantially impermeable to liquids and substantially permeable to water vapor. In other words, the sealing member 38 is permeable to water vapor, but impermeable to liquid water or wound exudate. This enhances the total fluid handling capacity (TFHC) of the wound treatment system 10 while promoting a moist wound environment. In some embodiments, the sealing member 38 is also impermeable to bacteria and other microorganisms. In some embodiments, the sealing member 38 is configured to wick moisture from the negative pressure manifold 34 and distribute moisture on the first surface 94. In some embodiments, the adhesive applied to the second surface 98 of the sealing member 38 is moisture vapor permeable and / or patterned to allow water vapor to pass through the adhesive.

[0052] Connecting plate

[0053] See now Figure 6, the connecting plate 42 includes a first surface 102 and a second surface 106 facing the abdominal contents. The connecting plate 42 includes an instillation inlet 110 and an NPWT inlet 114. In the illustrated embodiment, the connecting plate 42 is a relatively dense material that serves as a land for the instillation catheter pad 118 and the NPWT catheter pad 122. When the instillation catheter pad 118 and the NPWT catheter pad are connected, the connecting plate 42 also provides a visual indication of where to cut or pierce the sealing member 38. For example, the connecting plate 42 may include markings (e.g., colors, patterns, words, etc.) to help the operator locate the instillation catheter pad 118 and the NPWT catheter pad 122. For example, in the illustrated embodiment, the visual contrast between the color of the connecting plate 42 and the color of the negative pressure manifold 34 can help the operator correctly locate the instillation catheter pad 118 and the NPWT catheter pad 122. In some embodiments, the connecting plate 42 may include an adhesive layer on the second surface 106 of the connecting plate 42 for fixing the connecting plate 42 to the negative pressure manifold 34 to prevent the connecting plate 42 from sliding.

[0054] Infusion and NPWT Catheter Connection System - Separate Infusion Pads and NPWT Pads

[0055] See now Figure 1 to Figure 2 , shows a connection system 124 for connecting a wound therapy dressing to an instillation system 22 and a NPWT system 26 according to some embodiments. Figure 1 A cross-sectional view of the connection system 124 mounted on the negative pressure manifold 34 is shown. Figure 2 A perspective view of the connection system 124 engaged with the wound dressing 14 is shown.

[0056] The connection system 124 is shown to include a connection plate 126, a drip catheter pad 118, and a NPWT catheter pad 122. The drip catheter pad 118 is secured to the drip catheter 130 of the drip system 22 by a substantially fluid-tight connection. The drip catheter pad 118 includes a drip outlet connector 134 configured to engage the connection plate 126, as described in detail below. In the illustrated embodiment, the drip outlet connector 134 is a hole. The NPWT catheter pad 122 is secured to the negative pressure catheter 138 of the NPWT system 26 by a substantially fluid-tight connection. The NPWT catheter pad 122 includes a NPWT outlet connector 142 configured to engage the connection plate 126, as described in detail below. In the illustrated embodiment, the NPWT outlet connector 142 is a protrusion. In some embodiments, the NPWT outlet connector 142 is a pointed protrusion (e.g., a spear). In some embodiments, the NPWT outlet connector includes a barb 146. As Figure 1 As shown, in some embodiments, the infusion catheter 130 and the negative pressure catheter 138 are made of thin and / or flexible tubing to reduce patient discomfort.

[0057] The connection plate 126 is fixed to the first surface 82 of the negative pressure manifold 34. The connection plate 126 includes a drip connection structure 150 ( Figure 1 ), a drip inlet connector 154, and an NPWT inlet connector 158. The drip connection structure 150 extends through the negative pressure manifold 34 (e.g., between the first surface 82 and the second surface 86) to facilitate fluid communication between the drip inlet connector 154 and the fluid distribution hub 72. The drip connection structure 150 is configured to prevent the lateral flow of the drip fluid into the negative pressure manifold 34. For example, the drip connection structure may be made of a material that is substantially impermeable to the drip fluid, or may be coated with a material that is substantially impermeable to the drip fluid. More specifically, the drip inlet connector 154 may be secured to the drip connection structure 150 and secured to the drip module 30 proximate the opening 76 to form a drip fluid flow path that is fluidly separate from the NPWT flow path.

[0058] The drip inlet connector 154 is in fluid communication with the drip connection structure 150. The drip inlet connector 154 is configured to engage the drip catheter pad 118. In the illustrated embodiment, the drip inlet connector 154 is a protrusion extending from the connecting plate 126. In some embodiments, the distal end of the drip inlet connector 154 is pointed (e.g., a spear). In some embodiments, the drip inlet connector includes a barb 162 for engaging the drip outlet connector 134 in a friction fit. Although in the illustrated embodiment, the drip inlet connector 154 is shown as a protrusion and the drip outlet connector 134 is shown as a hole, in different embodiments, the drip inlet connector 154 and the drip outlet connector 134 may have different shapes, as long as the drip inlet connector 154 and the drip outlet connector 134 remain able to engage. For example, in some embodiments, the drip inlet connector 154 may be a hole, and the drip outlet connector 134 may be a protrusion.

[0059] like Figure 1 As best shown, the NPWT inlet connector 158 is in fluid communication with the negative pressure manifold 34. In the illustrated embodiment, the NPWT inlet connector 158 is a through hole in the connecting plate 126 that is configured to engage the NPWT outlet connector 142 in a friction fit manner. Although in the illustrated embodiment, the NPWT inlet connector 158 is shown as a through hole and the NPWT outlet connector 142 is shown as a protrusion, in different embodiments, the NPWT inlet connector 158 and the NPWT outlet connector 142 may have different shapes as long as the NPWT inlet connector 158 and the NPWT outlet connector 142 remain able to engage. For example, in some embodiments, the NPWT inlet connector 158 can be a protrusion and the NPWT outlet connector 142 can be a hole.

[0060] like Figure 1 and Figure 2 It can be clearly seen that the drip inlet connector 154 and the NPWT inlet connector 158 are different shapes. This is intended to prevent the drip outlet connector 134 from engaging the NPWT inlet connector 158 and to prevent the NPWT outlet connector 142 from engaging the drip inlet connector 154. Figure 1 As best shown, the connection plate 126 is positioned below and visible through the sealing member 38. The connection plate is configured to guide an operator of the wound treatment system 10 to properly connect the drip catheter pad 118 and the NPWT catheter pad 122. For example, the drip inlet connector 154 and the drip outlet connector 134 include a first pair of markings 166 indicating that the drip outlet connector 134 should be connected to the drip inlet connector 154. The NPWT inlet connector 158 and the NPWT outlet connector 142 include a second pair of markings 170 that are different from the first pair of markings 166 to indicate that the NPWT outlet connector 142 should be connected to the NPWT inlet connector 158. In some embodiments, the first pair of markings 166 and the second pair of markings 170 may be colors, patterns, or shapes.

[0061] like Figure 1As shown, when the wound dressing 14 is deployed in the patient, the connecting plate 126 is positioned below the sealing member 38. The drip inlet connector 154 and the drip outlet connector 134 are accessible through the sealing member 38 (e.g., by piercing the sealing member 38). As the sealing member 38 is secured to the patient, the drip inlet connector 154 pierces the sealing member 38. The NPWT outlet connector 142 on the NPWT catheter pad 122 pierces the sealing member 38 to connect to the NPWT inlet connector 158 of the connecting plate 126. Therefore, the first surface 174 of the connecting plate 126 can be coated with an adhesive for securing the connecting plate 126 to the second surface 98 of the sealing member 38 to maintain a fluid-tight seal of the peritoneal cavity. As the drip catheter pad 118 and the NPWT catheter pad 122 engage with the connecting plate 126, the adhesive can prevent the connecting plate 126 from shifting. In some embodiments, the drip catheter pad 118 and the NPWT catheter pad 122 may include an adhesive layer surrounding the drip outlet connector 134 and the NPWT outlet connector 142, respectively, for forming a fluid-tight seal with the first surface of the sealing member 38. The connecting plate 126 has a sufficiently high density and / or a sufficiently thick thickness to prevent the protrusion of the NPWT outlet connector 142 from contacting the patient and causing discomfort to the patient. In some embodiments, the connecting plate is made of a dense open-cell foam. In other embodiments, the connecting plate may be made of a plastic material. In some embodiments, the connecting plate 126 is made of a deformable material and / or the size of the negative pressure manifold 34 is set to be thicker than the connecting plate 126, so that pressure is applied to the connecting plate 126 as the drip catheter pad 118 and the NPWT catheter pad 122 are connected, and compression in the abdominal cavity during NPWT does not cause the connecting plate 126 and / or the NPWT outlet connector 142 to cause discomfort to the patient.

[0062] like Figure 1 As shown, the wound treatment system 10 includes a drip flow path (arrow 172) that is fluidly separate from the negative pressure flow path (arrow 176). As shown by arrow 172, the drip fluid enters the wound treatment system 10 from the drip system 22 and travels along the drip conduit 130 to the drip conduit pad 118. The drip fluid then flows through the drip inlet connector 154 of the connecting plate 126 to the drip connection structure 150. The drip fluid then enters the fluid distribution hub 72 of the drip module 30 and travels along the fluid distribution structure 74. The drip fluid exits the fluid distribution structure 74 through the window hole 78 and travels to the treatment site.

[0063] As indicated by arrows 176, the negative pressure generated by the negative pressure source 46 of the NPWT system 26 causes fluid (e.g., instillation fluid, wound exudate, etc.) to enter the plurality of elongated legs 73 of the abdominal treatment device 28 through the fenestrations 77. As indicated by arrows 176, the fluid travels through at least a portion of the elongated legs 73 and exits the abdominal treatment device through the fenestrations 77. The fluid then travels through the negative pressure manifold 34 to the NPWT inlet connector 158 of the connection plate 126. The fluid then travels along the NPWT catheter pad 122 to the negative pressure catheter 138 and into the fluid collection chamber 50 of the NPWT system 26.

[0064] Infusion and NPWT Catheter Connection System - All-in-one Infusion Pad and NPWT Pad

[0065] Figure 3 A connection system 178 for connecting the wound treatment system 10 to the drip system 22 and the NPWT system 26 is shown according to some embodiments. The connection system 178 is shown as including the connection plate 126 and the integrated catheter pad 182. The integrated catheter pad 182 includes a drip outlet portion 186 and an NPWT outlet portion 190. The drip outlet portion 186 is secured to the drip catheter 130 of the drip system 22 by a substantially fluid-tight connection. The drip outlet portion 186 includes a drip outlet connector 194 configured to engage the drip inlet connector 154 of the connection plate 126. In the illustrated embodiment, the drip outlet connector 194 is a hole. The NPWT outlet portion 190 is secured to the negative pressure catheter 138 of the NPWT system 26 by a substantially fluid-tight connection.

[0066] The NPWT outlet portion 190 includes an NPWT outlet connector 196 configured to engage the NPWT inlet connector 158 of the connection plate 126, as described in detail below. In the illustrated embodiment, the NPWT outlet connector 196 is a protrusion. In some embodiments, the NPWT outlet connector 196 is a pointed protrusion (e.g., a spear). In some embodiments, the NPWT outlet connector includes a barb 198. Figure 3 As shown, in some embodiments, the infusion catheter 130 and the negative pressure catheter 138 are made of thin and / or flexible tubing to reduce patient discomfort.

[0067] The connection plate 126 and the integrated drip and NPWT catheter pad 182 have substantially the same shape to facilitate alignment of the drip outlet connector 194 with the drip inlet connector 154 and alignment of the NPWT outlet connector 196 with the NPWT inlet connector 158. For example, the connection plate 126 is configured to have a fixed spacing between the drip inlet connector 154 and the NPWT inlet connector 158. The integrated NPWT catheter pad 182 is configured to have a fixed spacing between the drip outlet connector 194 and the NPWT outlet connector 196 that is the same as the spacing between the drip inlet connector 154 and the NPWT inlet connector 158. Therefore, the integrated drip and NPWT catheter pad 182 can be configured (e.g., have a size and spacing) to engage a connection plate 126 having a specific size (e.g., corresponding to a specific size and / or type of wound dressing 14).

[0068] like Figure 3 As shown, the drip inlet connector 154 and the NPWT inlet connector 158 are different shapes. This is intended to prevent the drip outlet connector 194 from engaging the NPWT inlet connector 158 and to prevent the NPWT outlet connector 196 from engaging the drip inlet connector 154. Figure 3 As best shown, the drip inlet connector 154 and the drip outlet connector 134 include a first pair of markings 202 indicating that the drip outlet connector 134 should be connected to the drip inlet connector 154. The NPWT inlet connector 158 and the NPWT outlet connector 142 include a second pair of markings 206 that are different from the first pair of markings 202 to indicate that the NPWT outlet connector 142 should be connected to the NPWT inlet connector 158. In some embodiments, the first pair of markings 202 and the second pair of markings 206 may be colors, patterns, shapes, and / or words.

[0069] Compressible infusion catheter-bellows

[0070] Figures 4 to 6 A negative pressure manifold 34 including a compressible drip connection structure 210 is shown. The compressible drip connection structure 210 is intended to expand and contract with the negative pressure manifold 34 as the negative pressure manifold 34 expands and contracts during a cycle of NPWT therapy (e.g., the negative pressure manifold 34 and the compressible drip connection structure 210 expand when not under negative pressure and compress when under negative pressure). The compressible drip connection structure 210 is also intended to expand and contract to accommodate different thicknesses of the negative pressure manifold 34. Figure 4As best shown, the compressible drip connection structure 210 includes a first connection plate 214, a second connection plate 218, and a flow path 222 extending between the first connection plate 214 and the second connection plate 218. The first connection plate 214 includes a first connection surface 226 and a second surface 230 facing the negative pressure manifold. The first connection plate 214 includes a flow path inlet 234. The second connection plate 218 includes a second connection surface 238 and a first surface 242 facing the negative pressure manifold. The second connection plate 218 includes a flow path outlet 246. Figure 5 As best shown, the first connection plate 214 and the second connection plate 218 are spaced apart to receive the negative pressure manifold 34 therebetween.

[0071] The flow path 222 extends between the flow path inlet 234 and the flow path outlet 246 to guide the drip fluid from the drip conduit 130 of the drip system 22 to the fluid distribution hub 72 of the drip module 30. The flow path 222 defines a longitudinal axis A. The flow path 222 is flexible and is configured to expand and contract in a direction substantially defined by the longitudinal axis A. The flow path 222 is formed by a plurality of angled walls 250. The plurality of angled walls 250 are oriented to form adjacent thick sections and thin sections to form a bellows structure. Under negative pressure, the angled walls 250 deflect toward the horizontal plane, resulting in contraction in the direction defined by the longitudinal axis A. In the illustrated embodiment, the plurality of angled walls 250 include four angled walls 250. In other embodiments, the plurality of angled walls 250 may include more or fewer angled walls. In the illustrated embodiment, the plurality of angled walls 250 form a tapered segment. In other embodiments, the plurality of angled walls may form segments of other shapes, such as pyramid shapes.

[0072] In some embodiments, the first connecting plate 214, the second connecting plate 218, and the flow path 222 are integrally formed as a single component. In other embodiments, the first connecting plate 214, the second connecting plate 218, and the flow path 222 can be formed separately and then fixed together to form the compressible drip connection structure 210. The compressible drip connection structure 210 is made of a flexible material that can withstand expansion and contraction cycles. The compressible drip connection structure 210 is configured to prevent the drip fluid from flowing laterally into the negative pressure manifold 34. For example, the compressible drip connection structure can be made of a material that is substantially impermeable to the drip fluid, or can be coated with a material that is substantially impermeable to the drip fluid.

[0073] Figure 5 and Figure 6 A compressible drip connection structure 210 is shown deployed in a wound treatment system 10. Figure 5As shown, the compressible drip connection structure 210 can be received in and extend through a hole in the negative pressure manifold 34. The second connection surface 238 of the second connection plate 218 is fixed to the drip module 30 near the fluid distribution hub 72 so that the flow path outlet 246 is in fluid communication with the opening 76 of the fluid distribution hub 72 to produce a drip flow path that is fluidly separate from the NPWT flow path. In some embodiments, the second connection surface 238 can be welded to the drip module 30. In other embodiments, the second connection surface 238 can be fixed to the drip module 30 by an adhesive. In some embodiments, such as Figure 5 In the illustrated embodiment, the first connection surface 226 of the compressible drip connection structure 210 can be secured to the second surface 98 of the sealing member 38 by an adhesive. In such an embodiment, the first connection surface 226 of the compressible drip connection structure 210 can include markings (not shown) to facilitate the placement of the drip catheter pad 118 (e.g., to provide an indication of where to cut a hole into or pierce the sealing member 38). The compressible drip connection structure 210 can be compressed in response to the force applied by the operator when securing the drip catheter pad 118, thereby preventing discomfort to the patient during the placement of the drip catheter pad 118.

[0074] In other embodiments, such as Figure 6 In some embodiments, the first connection surface 226 can be secured to the connection plate 42 by an adhesive. In some embodiments, the first connection surface 226 can include an indicia 254 indicating that the first connection surface 226 should be secured to the connection plate 42. In some embodiments, the first connection surface 226 can include an adhesive for securing the first connection surface 226 to the connection plate 42. In such embodiments, the first connection surface can include a removable backing, and the indicia 254 can be positioned on the removable backing.

[0075] like Figure 5 As shown, the wound treatment system 10 includes a drip flow path (arrow 252) that is fluidly separate from the negative pressure flow path (arrow 256). As shown by arrow 252, the drip fluid enters the wound treatment system 10 from the drip system 22 and travels along the drip conduit 130 to the drip conduit pad 118. The drip fluid then flows through the drip inlet 110 of the connecting plate 42 to the flow path inlet 234 of the compressible drip connection structure 210. The drip fluid travels along the flow path 222 and exits the compressible drip connection structure 210 through the flow path outlet 246. The drip fluid then enters the fluid distribution hub 72 of the drip module 30 and travels along the fluid distribution structure 74. The drip fluid exits the fluid distribution structure 74 through the window hole 78 and travels to the treatment site.

[0076] As indicated by arrows 256, the negative pressure generated by the negative pressure source 46 of the NPWT system 26 causes fluid (e.g., instillation fluid, wound exudate, etc.) to enter the plurality of elongated legs 73 of the abdominal treatment device 28 through the fenestrations 77. As indicated by arrows 256, the fluid travels through at least a portion of the elongated legs 73 and exits the abdominal treatment device 28 through the fenestrations 77. The fluid then travels through the negative pressure manifold 34 to the NPWT inlet connector 158 of the connection plate 126. The fluid then travels along the NPWT catheter pad 122 to the negative pressure catheter 138 and into the fluid collection chamber 50 of the NPWT system 26.

[0077] Infusion Catheter - Compressible Foam

[0078] Figures 7 and 8 A negative pressure manifold 34 including a compressible drip connection structure 258 is shown. The compressible drip connection structure 258 is positionable within the negative pressure manifold 34 and is intended to expand and contract with the negative pressure manifold 34 as the negative pressure manifold 34 expands and contracts during a cycle of NPWT therapy (e.g., the negative pressure manifold 34 and the compressible drip connection structure 258 expand when not under negative pressure and compress when under negative pressure) to reduce patient discomfort during NPWT. The compressible drip connection structure 258 can be made of the same material as the negative pressure manifold 34 so that during NPWT therapy, the compressible drip connection structure 258 compresses and expands substantially the same amount as the negative pressure manifold 34. As shown in FIG. Figure 4 As best shown, the compressible drip connection structure 258 includes a first surface 262 , a second surface 266 facing the abdominal contents, and a flow path 270 extending between the first surface 262 and the second surface 266 .

[0079] The flow path 270 extends between a flow path inlet 274 formed in the first surface 262 and a flow path outlet 278 formed in the second surface to guide the drip fluid from the drip conduit 130 of the drip system 22 to the fluid distribution hub 72 of the drip module 30. The flow path 270 defines a longitudinal axis B. A fluid-impermeable layer 282 is formed on at least a portion of the first surface 262 along the flow path 270 and on at least a portion of the second surface 266 to prevent the drip fluid from flowing laterally into the negative pressure manifold 34. In some embodiments, the fluid-impermeable layer 282. In the illustrated embodiment, the fluid-impermeable layer 282 is made of a polyurethane material. In other embodiments, the fluid-impermeable layer 282 may be made of another material that is substantially impermeable to the drip fluid.

[0080] The compressible drip connection structure 258 can be made of a compressible material such that the compressible drip connection structure 258 compresses under negative pressure along the longitudinal axis B. For example, the compressible drip connection structure can be made of the compressible reticulated foam material described above for the negative pressure manifold 34. In some embodiments, the compressible drip connection structure 258 can be made of the same material as the negative pressure manifold 34 such that the compressible drip connection structure 258 compresses and expands with the negative pressure manifold 34 during the NPWT cycle.

[0081] Figure 8 A compressible drip connection structure 258 is shown deployed in the wound treatment system 10. The compressible drip connection structure 258 can be received within the negative pressure manifold 34 and extend through the negative pressure manifold. The second surface 266 is secured to the drip module 30 proximate the fluid distribution hub 72 with a fluid-tight seal so that the flow path outlet 278 is in fluid communication with the fluid distribution hub 72 to form a fluid-tight drip flow path that is fluidly separate from the NPWT flow path. In some embodiments, the second surface 266 can be welded to the drip module 30. In other embodiments, the second surface 266 can be secured to the drip module 30 by an adhesive. In some embodiments, the first surface 262 is secured to the connecting plate 42 with an adhesive using a fluid-tight seal. In some embodiments, the first surface 262 is secured to the second surface 266 of the sealing member 38 using a fluid-tight seal. In some embodiments, the first surface 262 may include a marking 286 indicating that the first surface 262 should be secured to the connecting plate 42. In some embodiments, the first surface 262 may include an adhesive for fixing the first surface 262 to the connecting plate 42. In such embodiments, the first surface 262 may include a removable backing, and the marking 286 may be positioned on the removable backing. In embodiments where the second surface 266 can be fixed to the drip module 30 by an adhesive, the second surface 266 may include a marking (not shown) indicating that the second surface 266 should be fixed to the drip module 30. In some embodiments, the second surface 266 may include an adhesive for fixing the second surface 266 to the drip module 30. In such embodiments, the second surface 266 may include a removable backing, and the marking 286 may be positioned on the removable backing. In some embodiments, the marking 286 may be a color, pattern, shape and / or word.

[0082] like Figure 8As shown, the wound treatment system 10 includes a drip flow path (arrow 284) that is fluidly separate from the negative pressure flow path (arrow 286). As shown by arrow 284, the drip fluid enters the wound treatment system 10 from the drip system 22 and travels along the drip conduit 130 to the drip conduit pad 118. The drip fluid then flows through the drip inlet 110 of the connecting plate 42 to the flow path inlet 274 of the compressible drip connection structure 258. The drip fluid travels along the flow path 270 and exits the compressible drip connection structure 258 through the flow path outlet 278. The drip fluid then enters the fluid distribution hub 72 of the drip module 30 and travels along the fluid distribution structure 74. The drip fluid exits the fluid distribution structure 74 through the window hole 78 and travels to the treatment site.

[0083] As shown by arrows 286, the negative pressure generated by the negative pressure source 46 of the NPWT system 26 causes fluid (e.g., instillation fluid, wound exudate, etc.) to enter the plurality of elongated legs 73 of the abdominal treatment device 28 through the fenestrations 77. As shown by arrows 286, the fluid travels through at least a portion of the elongated legs 73 and exits the abdominal treatment device through the fenestrations 77. The fluid then travels through the negative pressure manifold 34 to the NPWT inlet connector 158 of the connection plate 126. The fluid then travels along the NPWT catheter pad 122 to the negative pressure catheter 138 and into the fluid collection chamber 50 of the NPWT system 26.

[0084] Integrated infusion catheter

[0085] Figures 9 and 10 A drip module 288 including an integrated drip catheter 290 is shown according to some embodiments. The drip module 288 is configured to facilitate substantially uniform distribution of the drip fluid regardless of the patient's position (e.g., supine or side-lying). The drip module 288 includes a first layer 292, a second layer 294, and a fluid distribution layer 298. The fluid distribution layer 298 includes a first surface 300 and a second surface 302 facing the abdominal contents. The fluid distribution layer 298 includes a fluid distribution hub 304, a plurality of fluid distribution structures 308 extending radially from the fluid distribution hub 304, and an integrated drip catheter 290 extending from the fluid distribution hub 304. The first layer 292, the second layer 294, the fluid distribution hub 304, and the plurality of fluid distribution structures 308 are substantially similar to the first layer 58, the second layer 62, the fluid distribution hub 72, and the plurality of fluid distribution structures 74 described above for the drip module 30, and for the sake of brevity, will not be described in detail herein.

[0086] The drip conduit 290 includes a generally elongated portion 312 extending from the fluid distribution hub 304. The distal end 316 of the generally elongated portion 312 can be enlarged to form a drip conduit base portion 320. The drip conduit base portion 320 is configured to engage the connection plate 42 and / or form a surface for engaging with the drip conduit 290. A portion of the first layer 292 and the second layer 294 encapsulates the drip conduit (e.g., the generally elongated portion 312 and the drip conduit base portion 320). The portion is made of a fluid-impermeable material and does not include a window 78, so that the drip fluid can enter the drip conduit 290 at the drip conduit base portion 320 and / or the distal end 316 and travel along the elongated portion 312 to the fluid distribution hub 304 for distribution to the fluid distribution structure 308.

[0087] Fig.10 The drip module 288 and the negative pressure manifold 34 positioned to treat the open abdominal cavity of the patient are shown. In the illustrated embodiment, the elongated portion 312 of the drip catheter 290 is wrapped around the negative pressure manifold 34 so that the first layer 292 and the first surface 300 of the elongated portion 312 abut the negative pressure manifold 34. In some embodiments, the portion of the first layer 292 abutting the negative pressure manifold 34 may include an adhesive for fixing the first layer 292 to the negative pressure manifold 34 to prevent the drip catheter 290 from sliding. The second layer 294 of the integrated drip catheter 290 (e.g., the second surface 302 of the drip catheter base portion 320) faces away from the first surface 82 of the negative pressure manifold 34. In some embodiments, at least a portion of the second layer 294 includes an adhesive for fixing the second layer 294 to the second surface 98 of the sealing member 38. In the illustrated embodiment, the connecting plate 42 is fixed to the drip catheter base portion 320, for example, by welding and / or an adhesive. In other embodiments, the elongated portion 312 of the drip conduit can extend through a hole in the negative pressure manifold 34. Thus, the drip conduit 290 forms a flow path between the drip conduit 290 engaged with the drip system 22 and the fluid distribution hub 304 that is fluidly separate from the flow path between the negative pressure manifold 34 and the NPWT system 26.

[0088] The wound treatment system 10 includes a drip flow path that is fluidly separate from the negative pressure flow path. The drip fluid enters the wound treatment system 10 from the drip system 22 and travels along the drip conduit 130 to the drip conduit pad 118. The drip fluid then flows through the drip inlet 110 of the connecting plate 42 to the drip conduit base portion 320 of the drip conduit 290 of the drip module 30. The drip fluid travels along the generally elongated portion 312 of the drip conduit 290 and then enters the fluid distribution hub 72. The drip fluid then enters and travels along the fluid distribution structure 74. The drip fluid exits the fluid distribution structure 74 through the window aperture 78 and travels to the treatment site.

[0089] The negative pressure generated by the negative pressure source 46 of the NPWT system 26 causes fluid (e.g., instillation fluid, wound exudate, etc.) to enter the plurality of elongated legs 73 of the abdominal treatment device 28 through the fenestrations 77. The fluid travels through at least a portion of the elongated legs 73 and exits the abdominal treatment device through the fenestrations 77. The fluid then travels through the negative pressure manifold 34 to the NPWT inlet connector 158 of the connection plate 126. The fluid then travels along the NPWT catheter pad 122 to the negative pressure catheter 138 and into the fluid collection chamber 50 of the NPWT system 26.

[0090] Integrated infusion catheter

[0091] Figure 11 to Figure 12 A drip module 328 including an integrated drip conduit 332 is shown according to some embodiments. The drip module 328 includes a first layer 336, a second layer 340, and a fluid distribution layer 344. The fluid distribution layer 344 includes a first layer 345 and a second layer 346 facing the abdominal contents. The fluid distribution layer 344 includes a fluid distribution hub 348 and a plurality of fluid distribution structures 352 extending radially from the fluid distribution hub 348, and a drip conduit 332 extending from the fluid distribution hub 348. The first layer 336, the second layer 340, and the plurality of fluid distribution structures 352 are substantially similar to the first layer 58, the second layer 62, and the plurality of fluid distribution structures 74 described above for the drip module 30, and for the sake of brevity, will not be described in detail herein.

[0092] The drip conduit 332 includes a fluid distribution hub engagement portion 356 and a flow path portion 360. The flow path portion 360 is engaged with the fluid distribution hub engagement portion 356 and the connecting plate 42. In the illustrated embodiment, the flow path portion 360 is a flexible tubing. The flow path portion 360 is configured to enable the drip module 328 and the negative pressure manifold 34 to move during the NPWT cycle. More specifically, the end of the flow path portion 360 is molded into the fluid distribution hub engagement portion 356 and the connecting plate 42. The fluid distribution hub engagement portion 356 includes a drip fluid inlet portion 364 engaged with the flow path portion 360 and a plurality of channels 368 that are fluidically connected to each of the fluid distribution structures of the plurality of fluid distribution structures 352. In the illustrated embodiment, the plurality of channels 368 are molded into the fluid distribution hub engagement portion 356.

[0093] The fluid distribution hub 348 includes an aperture 372 sized to receive the fluid distribution hub engagement portion 356. The fluid distribution hub engagement portion 356 is secured within the aperture 372. In some embodiments, the first layer 336 and the second layer 340 may extend over (e.g., envelop) the fluid distribution hub engagement portion 356. In other embodiments, the first layer 336 and the second layer 340 envelop the fluid distribution layer 344, including the walls of the aperture 372. In such embodiments, the fluid distribution hub engagement portion 356 may be welded to the first layer 336 and the second layer 340, and the first layer 336 and the second layer 340 may include windows aligned with the plurality of channels 368 to allow drip fluid to enter the fluid distribution hub 348.

[0094] Fig.12 The drip module 328 and the negative pressure manifold 34 are shown positioned to treat the open abdominal cavity of a patient. The flow path portion 360 of the drip conduit 332 is wrapped around the negative pressure manifold 32 so that the flow path portion 360 and the connecting plate 42 cover the first surface 82 of the negative pressure manifold 34. The connecting plate 42 can be fixed to the first surface of the negative pressure manifold 34, for example, by welding and / or adhesive. Thus, the drip conduit 332 forms a flow path with a fluidly separated flow path between the drip conduit 332 and the fluid distribution hub 348 engaged with the drip system 22. As shown in FIG. Fig.12 As shown, in some embodiments, a second instillation module may be used.

[0095] The wound treatment system 10 includes a drip flow path that is separate from the negative pressure flow path fluid. The drip fluid enters the wound treatment system 10 from the drip system 22 and travels along the drip conduit 130 to the drip conduit pad 118. The drip fluid then flows through the drip inlet 110 of the connecting plate 42 to the flow path portion 360 of the drip conduit 332. The drip fluid travels along the flow path portion 360 of the drip conduit 332 and then enters the fluid distribution hub 72. The drip fluid then enters and flows along the plurality of channels 368 to the plurality of fluid distribution structures 352. The drip fluid exits the fluid distribution structure 352 through the window aperture 78 and travels to the treatment site.

[0096] The negative pressure generated by the negative pressure source 46 of the NPWT system 26 causes fluid (e.g., instillation fluid, wound exudate, etc.) to enter the plurality of elongated legs 73 of the abdominal treatment device 28 through the fenestrations 77. The fluid travels through at least a portion of the elongated legs 73 and exits the abdominal treatment device through the fenestrations 77. The fluid then travels through the negative pressure manifold 34 to the NPWT inlet connector 158 of the connection plate 126. The fluid then travels along the NPWT catheter pad 122 to the negative pressure catheter 138 and into the fluid collection chamber 50 of the NPWT system 26.

[0097] Integrated drip catheter with friction fit seal

[0098] Figures 13 to 17 Shown is a drip module 376 and a drip connection sealing system 380. The drip module 376 and the drip connection sealing system 380 may be used in conjunction with the abdominal treatment device 28. Fig.13 A top perspective view of the drip module 376 and the drip connection sealing system 380 is shown in a storage position. Figures 14 to 16 Steps in a process for deploying the drip module 376 and the drip connection sealing system 380 are shown.

[0099] like Figures 14 to 17 As best shown, the drip module 376 includes an integrated drip conduit 436, a first layer 388, a second layer 392, and a fluid distribution layer 396. The fluid distribution layer 396 includes a fluid distribution hub 400 and a plurality of fluid distribution structures 404 extending radially from the fluid distribution hub 400. The first layer 388, the second layer 392, the fluid distribution hub 400, and the plurality of fluid distribution structures 404 are substantially similar to the first layer 58, the second layer 62, the fluid distribution hub 72, and the plurality of fluid distribution structures 74 described above for the drip module 30, and for the sake of brevity will not be described in detail herein. The integrated drip conduit 436 is in fluid communication with the fluid distribution hub 400 and is secured to the drip module 376 using a fluid-tight connection. In some embodiments, the integrated drip conduit 436 may be secured to the drip module 376 using a fluid-tight connection as described above for the drip module 30. Figure 11 to Figure 12 The fluid distribution hub engagement portion 356 is secured to the infusion module 376. In the illustrated embodiment, the integrated infusion catheter 436 is a flexible tube. In some embodiments, the integrated infusion catheter 436 can be provided in a storage position, wherein the integrated infusion catheter 436 is provided in a loop adjacent to the infusion module 376. Once positioned in the abdominal cavity, the integrated infusion catheter 436 can be expanded and deployed in the patient's body, as described in detail below.

[0100] The drip connection sealing system 380 includes a sealing plate 408, a sealing gasket 410, and a locking collar 412. The sealing plate 408 includes a first surface 416 and a second surface 420 facing the wound. The sealing plate 408 also includes a drip conduit passage 424 extending between the first surface 416 and the second surface 420. A portion of the drip conduit passage 424 extends above the first surface 416. The drip conduit passage 424 includes an outer surface 438 and an inner surface 440 defining a passage for receiving a drip conduit 436. At least a portion of the second surface 420 includes an adhesive for fixing the second surface 420 of the sealing plate 408 to the first surface 416 of the sealing member 38 in a fluid-tight seal.

[0101] The sealing pad 410 includes a first surface 437 and a second surface 439 facing the wound. The second surface 439 includes an adhesive coating. The sealing pad 410 is sized to form a seal around a hole formed in the sealing member 38 to retract the drip catheter 436, as described in detail below. In some embodiments, the sealing pad 410 can be made of the same material as the sealing member 38.

[0102] The locking collar 412 includes an outer surface 441 and an inner surface 442 that define a passage 444. The passage 444 is sized so that the locking collar 412 can move freely along the drip conduit 436. The passage 444 is sized to form a tight friction fit against the outer surface 440 of the drip conduit passage 444 of the sealing plate 408 to form a fluid-tight seal around the periphery of the drip conduit 436. In some embodiments, the locking collar 412 is more rigid than the drip conduit passage 424 and is sized so that engagement of the locking collar 412 with the drip conduit passage 424 causes the drip conduit passage 424 to deform inwardly against the drip conduit 436, thereby forming a tight seal around the periphery of the drip conduit 436. In some embodiments, the locking collar 412 also includes a flange 448 formed around a portion of the outer surface 441 of the locking collar 412 to assist an operator in gripping the locking collar 412.

[0103] Figures 14 to 16 A process for deploying the drip module 376 and the drip connection sealing system 380 is shown. Fig.14 As shown, the operator positions the infusion module 376 against the patient's abdominal contents. The operator then removes the infusion module 376 from the storage position ( Fig.13 ) deploy the drip catheter 436 and extend the drip catheter 436 through the hole in the negative pressure manifold 34 or wrap the drip catheter 436 on one side of the negative pressure manifold 34. The operator then secures the sealing member 38 to the patient's skin around the abdominal incision. The operator then forms a hole in the sealing member 38 and passes the drip catheter 436 through the hole in the sealing member 38. The user then positions the sealing gasket 405, the sealing plate 408, and the locking collar 412 along the drip catheter 436 so that the second surface 98 of the sealing member 38 is oriented toward the first surface 416 of the sealing member 38. The user then slides the sealing gasket 410 toward the sealing member 38 and secures the second surface 407 of the sealing gasket 410 around the hole in the sealing member 38. The user then slides the sealing plate 408 and the locking collar toward the sealing member 38, as indicated by arrow 452. The user secures the second surface 420 of the sealing plate 408 to the first surface 437 of the sealing gasket 410 with a fluid-tight seal. As Fig.15As shown, the user then slides the locking collar 412 toward the first surface 416 of the sealing plate as shown by arrow 456, thereby engaging the locking collar 412 in a friction fit manner and establishing a fluid-tight seal between the drip conduit passage 424 and the drip conduit 436, as shown in FIG. Fig.16 The operator may then connect the infusion catheter 436 to the infusion system 22 and begin infusion therapy.

[0104] Fig.17 A perspective view of the wound treatment system 10 is shown, which includes a drip module 376 and a drip connection sealing system 380 (interfacing with the drip system 22 for providing drip therapy), and a negative pressure manifold 34 (interfacing with the NPWT system 26 for providing NPWT). Fig.17 As shown, when the wound treatment system 10 is deployed in a patient, the wound treatment system includes a drip flow path (arrow 460) that is fluidly separate from a negative pressure flow path (arrow 464). As shown by arrow 460, the drip fluid enters the wound treatment system 10 from the drip system 22 and travels along the drip conduit 130 to the fluid distribution hub 400 of the drip module 376. The drip fluid then flows along the fluid distribution structure 404. The drip fluid exits the fluid distribution structure 404 through the fenestration 78 and travels to the treatment site.

[0105] As indicated by arrows 464, the negative pressure generated by the negative pressure source 46 of the NPWT system 26 causes fluid (e.g., instillation fluid, wound exudate, etc.) to enter the plurality of elongated legs 73 of the abdominal treatment device 28 through the fenestrations 77. As indicated by arrows 176, the fluid travels through at least a portion of the elongated legs 73 and exits the abdominal treatment device through the fenestrations 77. The fluid then travels through the negative pressure manifold 34 to the NPWT inlet connector 158 of the connection plate 126. The fluid then travels along the NPWT catheter pad 122 to the negative pressure catheter 138 and into the fluid collection chamber 50 of the NPWT system 26.

[0106] Combination of parts

[0107]

[0066] While the systems and methods disclosed herein are described in the context of various embodiments illustrated herein, it is contemplated that any of the systems and methods disclosed herein may be combined in various ways.

[0108] Configuration of the exemplary embodiment

[0109] The construction and arrangement of the system and method shown in various exemplary embodiments are only exemplary. Although only several embodiments are described in detail in the present disclosure, many modifications are possible (for example, the size, size, structure, shape and ratio changes, parameter values, installation arrangements, use of materials, colors, orientations, etc. of various elements). For example, the position of the element can be reversed or otherwise changed, and the property or quantity or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present disclosure. The order or sequence of any process or method step can be changed or reordered according to an alternative embodiment. Without departing from the scope of the present disclosure, other replacements, modifications, changes and omissions can be made to the design, operating conditions and arrangement of the exemplary embodiments.

Claims

1. A system for providing an instillation fluid to a deep abdominal wound, the system comprising: an infusion module defining a first surface and a second surface facing toward abdominal contents, the infusion module including a distribution hub configured to receive an infusion fluid from an infusion fluid source; A connection structure, comprising: First surface, a second surface facing the abdominal contents, and a flow path extending between the first surface of the connection structure and the second surface of the connection structure, the flow path including an inlet configured to receive an instillation fluid conduit engaged with the instillation fluid source and an outlet in fluid communication with the instillation module, the flow path defining an axis extending between the inlet and the outlet and configured to compress in a direction defined by the axis; wherein the second surface of the connection structure is fixed to the first surface of the drip module to provide a fluid-tight connection between the flow path and the drip module, and The distribution hub of the drip module receives the drip fluid passing through the flow path.

2. The system of claim 1, wherein at least a portion of the flow path is articulated to facilitate compression.

3. The system of claim 2, wherein the hinged portion of the flow path has a bellows shape.

4. The system of claim 1, wherein at least the flow path is configured to compress under negative pressure provided by a negative pressure source.

5. The system of claim 1, further comprising a negative pressure manifold defining a first surface and a second surface facing the abdominal contents, and wherein the flow path extends through and is positioned within the negative pressure manifold.

6. The system of claim 5, wherein the negative pressure manifold is configured to compress under a negative pressure provided by a negative pressure source, and wherein the connecting structure is configured to compress under the negative pressure provided by the negative pressure source.

7. The system of claim 5, wherein the negative pressure manifold is formed of a compressible material and the connecting structure is formed of the compressible material such that the negative pressure manifold and the connecting structure collapse by substantially the same amount under negative pressure.

8. The system of claim 7, wherein the compressible material is a reticulated foam material.

9. The system according to claim 1, further comprising a first bellows plate having the first surface of the connection structure, a second bellows plate having the second surface of the connection structure, and wherein the first bellows plate, the second bellows plate and the flow path are integrally formed.

10. The system of claim 1, further comprising a connection plate positioned adjacent to the first surface of the connection structure, the connection plate comprising markings for accurately positioning the instillation fluid conduit.

11. The system of claim 1 , wherein the first surface of the connection structure comprises a first fluid impermeable coating, the second surface of the connection structure comprises a second fluid impermeable coating, and the flow path comprises a flow path fluid impermeable coating.

12. The system of claim 11, wherein the first fluid impermeable coating, the second fluid impermeable coating, and the flow path fluid impermeable coating are polyurethane.

13. A system according to claim 1, further comprising a sealing member, which is fixed around the periphery of the wound to provide a fluid-tight seal around the periphery of the wound, and wherein the sealing member is fixed to the connecting structure to form a fluid-tight connection between the first surface of the connecting structure and the sealing member.

14. The system of claim 1, wherein the infusion module and the connection structure are positioned within an incision of the deep abdominal wound.

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