Fluid collection assembly comprising a porous material with an inner and outer layer - Patent Application 20070122997

Abstract

The exemplary fluid collection assembly 100 comprises a fluid-impermeable barrier 102. The fluid-impermeable barrier 102 at least defines a cavity 104, at least one opening 106, and a fluid outlet 108. The fluid collection assembly 100 also comprises at least one porous material 110 disposed within the cavity 104. The porous material 110 includes at least one outer porous material. The outer porous material facilitates the porous material 110 receiving bodily fluid and allowing bodily fluid to flow therethrough.

Description

[Technical Field]

[0001] The present invention relates to a fluid collection assembly comprising a porous material comprising an inner layer and an outer layer. [Background technology]

[0002] A human or animal may have a limitation or impairment in mobility that makes the normal process of urination difficult or impossible. For example, a human may experience or have an impairment that impairs mobility. A human may have limited mobility, such as conditions experienced by pilots, drivers, and workers in hazardous areas. Additionally, collection of bodily fluids may be necessary for monitoring purposes or for clinical testing. Summary of the Invention [Problem to be solved by the invention]

[0003] Urinary catheters, such as Foley catheters, can address some of these conditions, such as incontinence. Unfortunately, urinary catheters can be uncomfortable and painful and can lead to complications such as infection. In addition, commodes, which are containers used for toileting by bedridden individuals, are sometimes used. However, commodes are prone to discomfort, leakage, and other hygiene problems. [Means for solving the problem]

[0004] Embodiments are directed to a fluid collection assembly including at least one outer porous material, a fluid collection system including the fluid collection assembly, and methods of forming and using the fluid collection assembly. In one embodiment, a fluid collection assembly is disclosed. The fluid collection assembly includes a fluid-impermeable barrier that at least defines a cavity, at least one opening, and a fluid outlet. The fluid collection assembly also includes at least one porous material disposed in the cavity. The at least one porous material includes an outer layer and an inner layer. The outer layer includes at least one of bamboo, cellulose, hydrophilic polypropylene, hydrophilic polyethylene, or hydrophilic polyester.

[0005] In one embodiment, a fluid collection system is disclosed. The fluid collection system includes a fluid collection assembly. The fluid collection assembly includes a fluid-impermeable barrier that at least defines a cavity, at least one opening, and a fluid outlet. The fluid collection assembly also includes at least one porous material disposed in the cavity. The at least one porous material includes an outer layer and an inner layer. The outer layer includes at least one of bamboo, cellulose, hydrophilic polypropylene, hydrophilic polyethylene, or hydrophilic polyester. The fluid collection system also includes a fluid reservoir and a vacuum source. The cavity of the fluid collection assembly, the fluid reservoir, and the vacuum source are in fluid communication with each other such that, if one or more bodily fluids are present in the cavity, suction force applied from the vacuum source to the cavity of the fluid collection assembly removes the one or more bodily fluids from the cavity and stores the bodily fluids in the fluid reservoir.

[0006] In one embodiment, a method of using a fluid collection system is disclosed. The method includes positioning a fluid collection assembly such that at least one opening defined by a fluid-impermeable barrier of the fluid collection assembly is located adjacent to or receives the urethral opening. The fluid-impermeable barrier of the fluid collection assembly defines at least a cavity and a fluid outlet. The fluid collection assembly includes at least one porous material disposed within the cavity. The at least one porous material includes an outer layer and an inner layer. The outer layer includes at least one of bamboo, cellulose, hydrophilic polypropylene, hydrophilic polyethylene, or hydrophilic polyester.

[0007] Features from any of the disclosed embodiments can be used in combination with each other without limitation. Additionally, other features and advantages of the present disclosure will become apparent to those skilled in the art upon review of the following detailed description and accompanying drawings. [Brief explanation of the drawings]

[0008] The drawings illustrate several embodiments of the present disclosure, in which the same reference numerals refer to the same or similar elements or features from the various views or in the various embodiments shown in the drawings. [Figure 1A] FIG. 1 is a perspective view of a fluid collection assembly, according to one embodiment. [Figure 1B] 1B is a cross-sectional schematic view of the fluid collection assembly shown in FIG. 1A taken along plane 1B-1B. [Figure 1C] 1C is a cross-sectional schematic view of the fluid collection assembly shown in FIG. 1A taken along plane 1C-1C. [Figure 2A] FIG. 1 is a perspective view of a fluid collection assembly, according to one embodiment. [Figure 2B] 2B is a cross-sectional schematic view of the fluid collection assembly taken along plane 2B-2B shown in FIG. 2A. [Figure 3] 1 is a cross-sectional schematic view of a male fluid collection assembly according to one embodiment. [Figure 4]1 is a cross-sectional schematic view of a fluid collection assembly, according to one embodiment. [Figure 5] FIG. 1 is a block diagram of a fluid collection system for fluid collection, according to one embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Embodiments are directed to a fluid collection assembly including at least one of bamboo, cellulose, hydrophilic polypropylene, hydrophilic polyethylene, and hydrophilic polyester, a fluid collection system including the fluid collection assembly, and methods of forming and using the fluid collection assembly. An exemplary fluid collection assembly includes a fluid-impermeable barrier that at least defines a cavity, at least one opening, and a fluid outlet. The fluid collection assembly also includes at least one porous material disposed in the cavity. The porous material includes at least one inner layer and at least one outer layer. The outer layer includes at least one outer porous material. As used herein, the outer porous material refers to at least one of bamboo, cellulose, hydrophilic polypropylene, hydrophilic polyethylene, or hydrophilic polyester.

[0010] In use, the fluid collection assembly can be placed against an individual so that the opening is positioned adjacent to the female urethral opening or receives the male urethral opening (i.e., the penis). The individual can excrete one or more bodily fluids, such as urine, blood, or sweat. The bodily fluids can flow through the opening and into the porous material. The bodily fluids can be removed from the cavity via the fluid outlet. In one embodiment, suction from a vacuum source can be applied to the cavity, thereby removing the bodily fluids from the cavity.

[0011] Some conventional fluid collection assemblies include a hydrophobic porous material. Examples of hydrophobic porous materials that can be used in conventional fluid collection assemblies include hydrophobic polyester foam, hydrophobic polyester woven fabric, hydrophobic polyester compression bandages, spandex compression bandages, polyamide compression bandages, hydrophobic polypropylene foam, hydrophobic polypropylene woven fabric, spun nylon fibers, or other synthetic materials. Hydrophobic porous materials exhibit porosity and fluid permeability, allowing them to receive bodily fluids from an individual and allow the bodily fluids to flow through them. Hydrophobic porous materials are also inherently hydrophobic (i.e., exhibit a contact angle with water greater than 90°). The hydrophobic nature of the hydrophobic porous material allows bodily fluids received by the hydrophobic porous material to be pushed toward the outlet of the conventional fluid collection assembly, preventing the bodily fluids from remaining within the hydrophobic porous material. Thus, the hydrophobicity of the hydrophobic porous material allows conventional fluid collection assemblies to dry relatively quickly after receiving one or more bodily fluids from an individual, avoiding skin irritation and aggravation. However, it has been found that hydrophobic porous materials exhibit relatively poor absorbency and wicking properties (i.e., the spontaneous flow of bodily fluids driven by capillary forces and / or capillary pressure). In particular, hydrophobic porous materials exhibit relatively poor absorbency and wicking properties because, at least initially, their hydrophobic properties make them resistant to receiving bodily fluids and resist wetting the hydrophobic porous material. The relatively poor absorbency and wicking properties of hydrophobic porous materials can first result in bodily fluids not being effectively received within the hydrophobic porous material and then cause the bodily fluids to leak out of conventional fluid collection assemblies. The relatively poor wicking properties of the hydrophobic porous material may restrict the flow of bodily fluid through the hydrophobic porous material until the bodily fluid wets a substantial portion of the surface of the hydrophobic porous material, which may result in, at least initially, restricting the flow of bodily fluid through the hydrophobic porous material and causing localized areas of the hydrophobic porous material to become filled with bodily fluid.The flow of bodily fluids through the hydrophobic porous material may be restricted and / or localized fluid-filled areas may occur, resulting in leakage of bodily fluids from the hydrophobic porous material.

[0012] Some other conventional fluid collection assemblies attempt to solve these problems associated with hydrophobic porous materials by incorporating a hydrophilic porous material. Examples of hydrophilic porous materials used in conventional fluid collection assemblies include cotton and rayon, which are formed from raw materials other than bamboo. The hydrophilic porous materials of conventional fluid collection assemblies exhibit relatively good water absorption and wicking properties. However, unlike the hydrophobic porous materials described above, hydrophilic porous materials retain a significant amount of bodily fluids received by them and remain wet for an extended period of time. Because the hydrophilic porous material remains wet, conventional fluid collection assemblies incorporating a hydrophilic porous material can only be used for a short period of time after receiving bodily fluids to avoid skin irritation and aggravation.

[0013] Some other conventional fluid collection assemblies attempt to solve these problems associated with hydrophobic and hydrophilic porous materials by not including any porous material or by spacing the porous material away from the individual's skin. However, conventional fluid collection assemblies that do not include any porous material or that include porous material that is spaced away from the skin have difficulty receiving bodily fluids and may result in bodily fluid stagnation, which can either result in leakage of bodily fluids, aggravation of skin conditions, and skin irritation.

[0014] The conventional fluid collection assembly described above may be an external fluid collection assembly. An external fluid collection assembly is a fluid collection assembly that is not placed within an individual's urethral tract. An external fluid collection assembly significantly reduces the risk of catheter-associated urinary tract infections ("CAUTIs") compared to internal fluid collection assemblies (e.g., Foley catheters). In one embodiment, a conventional external fluid collection assembly is sterilized during the manufacturing and packaging process. Sterilizing a conventional external fluid collection assembly during the manufacturing and packaging process can be difficult and time-consuming, especially if the conventional external fluid collection assembly comprises a porous material. In one embodiment, a conventional external fluid collection assembly is not sterilized during the manufacturing and packaging process. Not sterilizing a conventional external fluid collection assembly makes manufacturing and packaging such an external fluid collection assembly significantly easier and faster than sterilizing a conventional external fluid collection assembly. Even a non-sterile conventional external fluid collection assembly significantly reduces the risk of CAUTIs compared to a conventional internal fluid collection assembly. However, compared to sterile conventional external fluid collection assemblies, non-sterile conventional external fluid collection assemblies are more susceptible to CAUTI. Additionally, conventional external fluid collection assemblies, whether sterile or not, are vulnerable to microbial attack, which can lead to CAUTI during use of such fluid collection assemblies.

[0015] The fluid collection assemblies disclosed herein include at least one outer porous material. In other words, the fluid collection assemblies disclosed herein include at least one of bamboo, cellulose, hydrophilic polypropylene, hydrophilic polyethylene, or hydrophilic polyester. The outer porous material allows the fluid collection assemblies disclosed herein to be an improvement over conventional fluid collection assemblies. For example, like the hydrophobic porous materials used in conventional fluid collection assemblies, the outer porous material is porous and fluid-permeable, allowing the outer porous material to receive and transmit bodily fluids. However, unlike hydrophobic porous materials, the outer porous material is hydrophilic, allowing the outer porous material to exhibit relatively good absorbency and wicking properties. The relatively good absorbency and wicking properties of the outer porous material reduce the likelihood of leakage from the outer porous material. Additionally, it has surprisingly been found that the outer porous material does not exhibit the aforementioned problems associated with other hydrophilic porous materials used in conventional fluid collection assemblies. For example, it has been found that the outer porous material does not retain significant amounts of bodily fluids within itself. In that way, the outer porous material can become relatively dry within a short time after receiving bodily fluids, and thus exhibit many of the same advantages as hydrophobic and hydrophilic porous materials without exhibiting many of their disadvantages.

[0016] The outer porous material exhibits several properties in addition to good fluid permeability, good absorbency, good wicking properties, and not retaining significant amounts of bodily fluids within itself. In one example, the outer porous material has been found to exhibit what has been described as a "soft feel," making fluid collection assemblies comprising the outer porous material more comfortable to use than fluid collection assemblies comprising other materials. In one example, the outer porous material has been found to exhibit better airflow conditions than other conventional porous materials, thereby allowing the outer porous material to dry more easily. The outer porous material can also be used in high-speed, high-volume manufacturing processes, as discussed in more detail below.

[0017] In one embodiment, the outer porous material can include one or more chemicals that make the outer porous material an improvement over conventional porous materials. For example, if the outer porous material includes bamboo, the outer porous material can include bamboo kun, a substance naturally found in bamboo. The bamboo kun provides the outer porous material with antifungal properties and antibacterial properties against both gram-positive and gram-negative bacteria. Thus, the presence of bamboo kun in the outer porous material renders the fluid collection assembly substantially equivalent to a sterilized conventional external fluid collection assembly in terms of susceptibility to CAUTI, even without actually sterilizing the fluid collection assembly. The bamboo kun outer porous material also makes the outer porous material less vulnerable to attack by infectious microorganisms that can cause CAUTI. The bamboo kun also makes the outer porous material odor-resistant, unlike the porous materials used in conventional fluid collection assemblies. The odor-resistance of the outer porous material makes using a fluid collection assembly comprising the outer porous material less cumbersome because, unlike conventional fluid collection assemblies, the fluid collection assembly comprising the outer porous material is less likely to have the detectable odor of urine or blood. Unlike the porous materials of conventional fluid collection assemblies, the bamboo kung also causes the outer porous material to repel dust mites, other insects, other infectious microorganisms, and viruses. The bamboo kung repels these organisms even while the bamboo forming the outer porous material is growing. Therefore, unlike materials used to form other natural porous materials (e.g., cotton and cellulose), the bamboo forming the outer porous material can be grown without pesticides, fungicides, and insecticides. As a result, the outer porous material is less likely to be contaminated with pesticides, fungicides, and insecticides than other natural porous materials, eliminating the need to treat the outer porous material to remove such substances. Bamboo Kun also makes the outer porous material more hypoallergenic than other porous materials used in conventional fluid collection assemblies.

[0018] Bamboo is also very comfortable in contact with the sensitive area around an individual's urethral opening (e.g., the penile and vaginal areas). For example, bamboo can receive and remove bodily fluids while remaining substantially dry within a short time after receiving the fluids. Bamboo is also a better conductor of heat than some porous materials used in conventional fluid collection assemblies, which, combined with the breathability of the outer porous material, reduces sweat production and heat retention by the area around an individual's urethral opening. Bamboo is also lightweight and soft to the touch. Furthermore, bamboo resists wrinkling, thereby preventing the formation of noticeable ridges on the surface of the outer porous material that could cause discomfort. Bamboo is also very clean compared to other porous materials, even after receiving bodily fluids, due to its antibacterial, antifungal, and other properties described above. Unlike some other porous materials used in conventional fluid collection assemblies, the outer layer containing bamboo is also environmentally friendly and stain-resistant.

[0019] As noted above, the outer porous material exhibits the advantages of both hydrophobic and hydrophilic porous materials, but it also exhibits several advantages that neither the hydrophobic nor hydrophilic porous materials exhibit, or at least most of them do not exhibit without difficult, expensive, and time-consuming manufacturing processes.

[0020] FIG. 1A is a perspective view of a fluid collection assembly 100 according to one embodiment. FIGS. 1B-1C are cross-sectional schematic views of the fluid collection assembly 100 taken along planes 1B-1B and 1C-1C, respectively, shown in FIG. 1A. This fluid collection assembly is an example of a fluid collection assembly configured to receive bodily fluids from a female urethral opening. The fluid collection assembly 100 includes a fluid-impermeable barrier 102. The fluid-impermeable barrier 102 defines at least a cavity 104, at least one opening 106, and a fluid outlet 108. The fluid collection assembly 100 also includes at least one porous material 110 disposed in the cavity 104 and extending across the opening 106. The porous material 110 includes an outer layer 111 and an inner layer 112. In one embodiment, the outer layer 111 includes at least one outer porous material. That is, the outer layer 111 includes at least one of bamboo, cellulose, hydrophilic polypropylene, hydrophilic polyethylene, or hydrophilic polyester.

[0021] The fluid-impermeable barrier 102 defines at least a cavity 104 (e.g., an interior region) and an opening 106. The fluid-impermeable barrier 102 temporarily stores bodily fluids in the cavity 104. The fluid-impermeable barrier 102 can be formed of any suitable fluid-impermeable material, such as a fluid-impermeable polymer (e.g., silicone, polypropylene, polyethylene, polyethylene terephthalate, neoprene, polycarbonate, etc.), a thin metal film, natural rubber, another suitable material, any other fluid-impermeable material disclosed herein, or a combination thereof. Thus, the fluid-impermeable barrier 102 substantially prevents bodily fluids from passing through the fluid-impermeable barrier 102. In one embodiment, the fluid-impermeable barrier 102 can be air-permeable and fluid-impermeable. In such an embodiment, the fluid-impermeable barrier 102 can be formed of a hydrophobic material defining a plurality of pores. At least one or more portions of at least one outer surface of the fluid-impermeable barrier 102 may be formed from a flexible and / or smooth material, thereby reducing the risk of trauma.

[0022] The opening 106 provides an ingress route for bodily fluids to enter the cavity 104. The opening 106 may be defined by the fluid-impermeable barrier 102, such as by an inner edge of the fluid-impermeable barrier 102. For example, the opening 106 may be formed in and extend through the fluid-impermeable barrier 102, thereby allowing bodily fluids to enter the cavity 104 from outside the fluid collection assembly 100.

[0023] In some examples, the fluid-impermeable barrier 102 can define a fluid outlet 108 sized to receive a conduit 114. At least one conduit 114 can be disposed within the cavity 104 through the fluid outlet 108. The fluid outlet 108 can be sized and shaped to form an at least substantially fluid-tight seal with the conduit 114 or at least one tube, thereby substantially preventing bodily fluids from escaping the cavity 104.

[0024] As described above, the fluid collection assembly 100 includes a porous material 110 disposed within the cavity 104. The porous material 110 can span at least a portion (e.g., all) of the opening 106. The porous material 110 is exposed to an environment outside the cavity 104 through the opening 106. The porous material 110 can include an outer layer 111 and an inner layer 112 that is separate from the outer layer 111.

[0025] The outer layer 111 of the porous material 110 is disposed within the cavity 104 so as to extend across the opening 106. The outer layer 111 is disposed within the porous material 110 so as to be closer to the individual's urethral opening than the inner layer 112. In other words, the outer layer 111 comprises the portion of the porous material 110 that initially receives bodily fluid from the individual. Thus, in one embodiment, the outer layer 111 may comprise an outer porous material. For example, the outer layer 111 is configured to quickly receive bodily fluid discharged from the individual, for example, by initially receiving the bodily fluid and preventing the bodily fluid from leaking out of the porous material 110. As described above, the outer porous material can quickly receive bodily fluid, and therefore, forming the outer layer 111 from an outer porous material allows the outer layer 111 to quickly receive bodily fluid.

[0026] In one embodiment, the outer porous material can be formed from any bamboo material. In one example, the outer porous material is formed from natural bamboo. Natural bamboo may be more environmentally friendly than other bamboo materials and may require fewer manufacturing processes than non-natural bamboo materials. In one example, the outer porous material can include black bamboo (i.e., bamboo from phyllostachys nigra). Black bamboo exhibits stronger antimicrobial properties than other types of bamboo, although other types of bamboo are known to exhibit antimicrobial properties. In one example, the outer porous material includes rayon formed from bamboo. In one example, the outer porous material can be formed from any cellulose material. In one example, the outer porous material is formed from naturally occurring cellulose, which may be more environmentally friendly than other cellulose materials. In one example, the outer porous material is formed from at least one of hydrophilic polypropylene, hydrophilic polyethylene, or hydrophilic polyester. Generally, polypropylene, polyethylene, and polyester are hydrophobic materials. Thus, the outer porous material can include at least one of modified polypropylene, modified polyethylene, or modified polyester, modified to increase its hydrophilicity (e.g., decrease its contact angle with water). For example, the polypropylene, polyethylene, and / or polyester can be modified using heat (e.g., flame), plasma treatment, chemical adhesion promoters (e.g., solvents such as toluene), smoothing the surface of the material, any other suitable modification, or a combination thereof. In one embodiment, the outer porous material can be formed from two or more of bamboo, cellulose, hydrophilic polypropylene, hydrophilic polyethylene, or hydrophilic polyester. In such an embodiment, for example, the outer porous material can include bamboo, such that the outer porous material can exhibit the antimicrobial properties of bamboo while avoiding the logistical issues associated with using less readily available materials, such as bamboo and cellulose, hydrophilic polypropylene, hydrophilic polyethylene, or hydrophilic polyester.

[0027] In one embodiment, the outer porous material can be hydrophilic, which allows the outer porous material to rapidly absorb bodily fluids into itself, thereby preventing or at least inhibiting leakage of bodily fluids that would otherwise occur due to the rapid discharge of large amounts of bodily fluids in a short period of time. The outer porous material may be hydrophilic if it exhibits a contact angle with water (a major component of bodily fluids) of about 0° to about 10°, about 5° to about 15°, about 10° to about 20°, about 15° to about 25°, about 20° to about 30°, about 25° to about 35°, about 30° to about 40°, about 35° to about 45°, about 40° to about 50°, about 45° to about 55°, about 50° to about 60°, about 55° to about 65°, about 60° to about 70°, about 65° to about 75°, about 70° to about 80°, about 75° to about 85°, or about 80° to about 90°. Generally, as the hydrophilicity of the outer porous material increases (i.e., the contact angle between the outer porous material and water decreases), the amount of bodily fluid that the outer porous material can receive in a given period of time increases. However, increasing the hydrophilicity of the outer porous material may increase the amount of bodily fluid that can be retained within the outer porous material after it receives the fluid. Thus, the hydrophilicity of the outer porous material may be selected based on adequately meeting the need to quickly receive bodily fluid while also maintaining a dry porous material 110. For example, a fluid collection assembly 100 configured for short-term use with individuals having large bladders may include an outer porous material that exhibits greater hydrophilicity than the outer porous material of a fluid collection assembly 100 configured for long-term use with individuals having average- to small-sized bladders.

[0028] In one embodiment, the hydrophilicity of the outer porous material can be an inherent property of the bamboo or cellulose fibers used to form the outer porous material. In one embodiment, the hydrophilicity of the outer porous material can be altered (e.g., increased or decreased) by adding at least one impurity or functional group to the outer porous material, otherwise treating the outer porous material, or coating the outer porous material with a material that exhibits a different hydrophilicity than the outer porous material. For example, the hydrophilicity of at least one of bamboo, cellulose, hydrophilic polypropylene, hydrophilic polyethylene, or hydrophilic polyester can be altered. It is known that the hydrophilicity of the outer porous material can depend on temperature, humidity, and other factors.

[0029] The outer porous material of the porous material 110 has a resistance of about 50 kg / m 3 ~about 100kg / m 3 , about 75kg / m 3 ~Approx. 125kg / m 3 , about 100kg / m 3 ~Approx. 150kg / m 3 , about 125kg / m 3 ~Approx. 175kg / m 3 , about 150kg / m 3 ~about 200kg / m 3 , about 175kg / m 3 ~Approx. 225kg / m 3 , about 200kg / m 3 ~about 250kg / m 3 , about 225kg / m 3 ~Approx. 275kg / m 3 , about 250kg / m 3 ~about 300kg / m 3 , about 275kg / m 3 ~Approx. 325kg / m 3 , about 300kg / m 3 ~About 350kg / m 3 , about 325kg / m 3 ~Approx. 375kg / m 3 , about 350kg / m 3 ~about 400kg / m 3 , about 375kg / m 3 ~Approx. 425kg / m 3, about 400kg / m 3 ~about 450kg / m 3 , about 425kg / m 3 ~Approx. 475kg / m 3 , about 450kg / m 3 ~about 500kg / m 3 , about 475kg / m 3 ~Approx. 525kg / m 3 , about 500kg / m 3 ~about 550kg / m 3 , about 525kg / m 3 ~Approx. 575kg / m 3 , or approximately 550 kg / m 3 ~about 600kg / m 3 The density of the sintered body can be selected to be 0.05 to 0.15.

[0030] As mentioned above, the outer porous material can be formed from a hydrophilic material, which allows the outer porous material to retain bodily fluids within it. To reduce the amount of bodily fluid retained by the outer porous material, the outer layer 111 can be configured to be relatively thin. For example, the outer layer 111 may have a thickness of about 2 mm or less, about 1.5 mm or less, about 1.25 mm or less, about 1 mm or less, about 800 μm or less, about 700 μm or less, about 600 μm or less, about 500 μm or less, about 400 μm or less, about 300 μm or less, about 250 μm or less, about 200 μm or less, about 150 μm or less, about 130 μm or less, about 100 μm or less, about 75 μm or less, about 60 μm or less, about 50 μm or less, about 40 μm or less, about 30 μm or less, about 25 μm or less, about 20 μm or less, or about 20 μm to about 30 μm, about 25 μm to about 40 μm, about 30 μm to about 50 μm, about 40 μm to about 60 μm, or about 50 μm to about The hologram may be configured to exhibit a thickness measured perpendicular to the longitudinal axis 118 (e.g., measured radially) ranging from 75 μm, about 60 μm to about 100 μm, about 75 μm to about 130 μm, about 100 μm to about 150 μm, about 130 μm to about 200 μm, about 150 μm to about 300 μm, about 200 μm to about 400 μm, about 300 μm to about 500 μm, about 400 μm to about 600 μm, about 500 μm to about 700 μm, about 600 μm to about 800 μm, about 700 μm to about 1 mm, about 800 μm to about 1.25 mm, about 1 mm to about 1.5 mm, or about 1.25 mm to about 2 mm. The relatively small thickness of outer layer 111 reduces the overall volume of the outer porous material, thereby reducing the volume of bodily fluid that can be retained within the outer porous material. Reducing the volume of bodily fluid retained within the outer porous material allows airflow through cavity 104 to quickly evaporate the bodily fluid retained within the outer porous material, thereby keeping porous material 110 dry. Additionally, a reduced thickness of outer layer 111 may allow inner layer 112 to draw more bodily fluid from the outer porous material. Note that thickness increases greater than about 1 mm may be found to adversely affect the flow of bodily fluid therethrough.

[0031] The outer porous material of the porous material 110 is approximately 10 g / m2 ~about 20g / m 2 , about 15g / m 2 ~about 25g / m 2 , about 20g / m 2 ~About 30g / m 2 , about 25g / m 2 ~Approx. 35g / m 2 , about 30g / m 2 ~about 40g / m 2 , about 35g / m 2 ~about 45g / m 2 , about 40g / m 2 ~about 50g / m 2 , about 45g / m 2 ~about 55g / m 2 , about 50g / m 2 ~about 60g / m 2 , about 55g / m 2 ~about 70g / m 2 , about 60g / m 2 ~about 80g / m 2 , about 70g / m 2 ~about 90g / m 2 , about 80g / m 2 ~about 100g / m 2 , about 90g / m 2 ~Approx. 110g / m 2 , about 100g / m 2 ~Approx. 120g / m 2 , about 115g / m 2 ~Approx. 125g / m 2 , about 120g / m 2 ~Approx. 140g / m 2 , or approximately 130 g / m 2 ~about 150g / m 2 The basis weight of the outer porous material is a function of the density and thickness of the outer porous material. Thus, the basis weight of the outer porous material can be selected for any of the same reasons as the density and thickness of the outer porous material.

[0032] As discussed above, the outer porous material is formed from a plurality of fibers. The plurality of fibers can exhibit an average length and an average lateral dimension (e.g., diameter). In one embodiment, the plurality of fibers can have a diameter of about 500 μm to about 2 mm, about 1 mm to about 3 mm, about 2 mm to about 4 mm, about 3 mm to about 5 mm, about 4 mm to about 6 mm, about 5 mm to about 7 mm, about 6 mm to about 8 mm, about 7 mm to about 9 mm, about 8 mm to about 1 cm, about 9 mm to about 1.2 cm, about 1 cm to about 1.4 cm, about 1.2 cm to about 1.6 cm, about 1.4 cm to about 1.8 cm, about 1.6 cm to about 2 cm, about 1.8 cm to about 2.25 cm, about 2 cm to about 2.5 cm, about 2.25 cm to about 2.75 cm, about 2.5 cm to about 3 cm, about 2.75 cm to about 3.25 cm, about It can be selected to have an average length of 3 cm to about 3.5 cm, about 3.25 cm to about 3.75 cm, about 3.5 cm to about 4 cm, about 3.75 cm to about 4.25 cm, about 4 cm to about 4.5 cm, about 4.25 cm to about 4.75 cm, about 4.5 cm to about 5 cm, about 4.75 cm to about 5.5 cm, about 5 cm to about 6 cm, about 5.5 cm to about 6.5 cm, about 6 cm to about 7 cm, about 6.5 cm to about 7.5 cm, about 7 cm to about 8 cm, about 7.5 cm to about 8.5 cm, about 8 cm to about 9 cm, about 8.5 cm to about 9.5 cm, or about 9 cm to about 10 cm. In one embodiment, the plurality of fibers may be about 1 μm to about 2 μm, about 1.5 μm to about 3 μm, about 2 μm to about 4 μm, about 3 μm to about 5 μm, about 4 μm to about 7 μm, about 6 μm to about 10 μm, about 8 μm to about 12.5 μm, about 10 μm to about 15 μm, about 12.5 μm to about 17.5 μm, about 15 μm to about 20 μm, about 17.5 μm to about 25 μm, about 20 μm to about 30 μm, about 25 μm to about 35 μm, about 30 μm to about 40 μm, about 40 μm to about 50 μm, about 50 μm to about 60 μm, about 60 μm to about 70 μm, about 70 μm to about 80 μm, about 80 μm to about 90 μm, about 90 μm to about 100 μm, about 10 ... The average length and average transverse dimension of the fibers can be selected so that the fibers have an average aspect ratio of about 1 / 2 to about 1 / 4. The average length and average transverse dimension of the fibers can be selected so that the fibers have an average aspect ratio of about 1 / 2 to about 1 / 4.For example, the average length and average transverse dimension of the fibers may be such that the fibers are from about 100:1 to about 200:1, from about 150:1 to about 250:1, from about 200:1 to about 300:1, from about 250:1 to about 350:1, from about 300:1 to about 400:1, from about 350:1 to about 450:1, from about 400:1 to about 500:1, from about 450:1 to about 550:1, from about 500:1 to about 600:1, They can be selected to exhibit an average aspect ratio (average length:average lateral dimension) of 550:1 to about 650:1, about 600:1 to about 700:1, about 650:1 to about 750:1, about 700:1 to about 800:1, about 750:1 to about 850:1, about 800:1 to about 900:1, about 850:1 to about 950:1, or about 900:1 to about 1,000:1.

[0033] The average length, average transverse dimension, and average aspect ratio of the fibers can be selected based on several factors. In one example, increasing the aspect ratio (e.g., decreasing the average length and / or increasing the average transverse dimension) can increase the durability of the outer porous material, but can decrease the strength of the outer porous material. In one example, increasing the aspect ratio of the fibers (e.g., increasing the average length) can increase the mechanical cohesion of the fibers. For example, increasing the aspect ratio of the fibers can increase the tendency for the fibers to entangle, thereby increasing the strength and durability of the outer porous material. Fiber entanglement can also eliminate or minimize the amount of other bonding techniques applied to the outer porous material, such as heat, chemical bonding, or other mechanical bonding (e.g., additional entanglement caused by needle punching or high-pressure water jets). However, increasing the aspect ratio of the fibers can make it more difficult to distribute the fibers (e.g., it can be more difficult to maintain a uniform outer porous material). Furthermore, increasing the aspect ratio may limit the type of nonwoven web that can form the outer porous material. For example, fibers with a large average length (e.g., a large aspect ratio) may not be usable in a carded web and may need to be used in an airlaid web. In one example, decreasing the aspect ratio may reduce fiber entanglement, thereby requiring additional fiber bonding. Thus, the average fiber length, average transverse dimension, and average aspect ratio can be selected based on the desired strength, the mechanical bond between the fibers, the amount of treatment of the outer porous material (e.g., whether additional treatment to increase bond strength, such as with heat, is desired), the type of nonwoven web containing the fibers, the uniformity of the fibers, etc.

[0034] Generally, the average person excretes urine at a rate of about 10 ml / s to about 25 ml / s, for example, about 6 ml / s to about 50 ml / s. The rate at which a person urinates may vary depending on the person's size and age. The outer porous material can be selected to receive bodily fluids and allow them to flow through a portion of the outer porous material at a rate comparable to the rate at which the individual excretes the bodily fluids to prevent leakage. For example, the outer porous material can receive bodily fluids and allow them to flow through a portion of the outer porous material at a rate comparable to the rate at which the individual excretes the bodily fluids, such as greater than about 6 ml / s, greater than about 10 ml / s, greater than about 20 ml / s, greater than about 30 ml / s, greater than about 40 ml / s, greater than about 50 ml / s, or between about 6 ml / s and about 10 ml / s, between about 8 ml / s and about 12 ml / s, between about 10 ml / s and about 15 ml / s, between about 12.5 ml / s and about 17.5 ml / s, or between about 15 ml / s and about 20 ml / s. The bodily fluid may be selected to flow through a portion of the outer porous material at a rate ranging from about 17.5 ml / s to about 22.5 ml / s, about 20 ml / s to about 25 ml / s, about 22.5 ml / s to about 27.5 ml / s, about 25 ml / s to about 30 ml / s, about 27.5 ml / s to about 35 ml / s, about 30 ml / s to about 40 ml / s, about 35 ml / s to about 45 ml / s, or about 40 ml / s to about 50 ml / s.

[0035] The rate at which the outer porous material receives and flows through its portions may depend on several factors. In one example, the rate at which the outer porous material receives and flows through its portions may be inversely dependent on the density and basis weight of the outer porous material, such that as the density and / or basis weight of the outer porous material increases, the rate at which the outer porous material receives and flows through its portions may decrease, and vice versa. In one example, the rate at which the outer porous material receives and flows through its portions may depend on the hydrophilicity of the outer porous material. In one example, the rate at which the outer porous material receives and flows through its portions may depend on the type of nonwoven web (e.g., carded web, needlepunched web, etc.), as each type of nonwoven web may exhibit different rates at which the outer porous material acquires and transports bodily fluids.

[0036] As described above, the outer porous material can be formed from at least one nonwoven web. The outer porous material can be formed from any suitable nonwoven web. In one embodiment, the nonwoven web of the outer porous material includes at least one carded web. A carded web includes a plurality of fibers that can be oriented in a generally co-directional manner. The generally co-directional orientation of the fibers in a carded web results in anisotropic carded web properties. For example, the strength of a carded web is greatest when the forces acting on it are parallel to the fibers, but the strength of the carded web decreases as the forces acting on it become more oblique or perpendicular to the fiber orientation. Therefore, the carded web may need to be placed in the cavity 104 in a way that reduces forces acting on the carded web that are not generally parallel to the fiber orientation, or additional bonding (e.g., thermal or chemical) between the fibers may be required to prevent undesirable wear of the carded web. The initial flow of bodily fluid through the carded web may vary depending on whether the bodily fluid is parallel, oblique, or perpendicular to the fiber orientation. Thus, selecting a nonwoven web to include a carded web allows for the strength and flow characteristics of the porous material 110 to be selected based on the fiber orientation. Although the fibers are generally oriented, the orientation of each fiber may vary slightly, resulting in a carded web with a sufficiently high porosity such that the carded web exhibits any of the densities, thicknesses, basis weights, and flow rates disclosed herein.

[0037] In one embodiment, the outer nonwoven web of porous material can include at least one needle-punched web. The needle-punched web can be formed from a sheet containing a plurality of fibers. The sheet can include a plurality of randomly oriented fibers (e.g., fibers generally parallel to a plane and randomly oriented within the plane), or a plurality of generally oriented fibers, since the fiber orientation allows bodily fluids to flow more easily therethrough. A plurality of needles (e.g., a plurality of barbed needles) can be inserted into the sheet in a direction generally parallel to the thickness of the sheet, causing some of the fibers to entangle and intertwine. For example, inserting the needles into the sheet can cause some of the fibers to reorient and move from the surface of the sheet to its interior, forming columns. The entanglement of the fibers caused by inserting the needles can be sufficient to entangle the fibers so that additional bonding is not required to bond the fibers together. The entanglement of the fibers may cause needlepunched webs to exhibit more isotropic properties compared to carded webs, and therefore may not require special orientation or additional bonding of the fibers within the cavities 104. Needlepunched webs may also exhibit good flow characteristics. For example, needles extending into the sheet may form depressions that allow bodily fluids to easily flow vertically through the needlepunched web.

[0038] In one embodiment, the outer nonwoven web of porous material can include at least one airlaid web. Airlaid webs can have a plurality of randomly oriented fibers. The plurality of random fibers can be of a length large enough that the fibers are entangled and do not need to be bonded together, or the fibers can be glued together. Due to the randomly oriented fibers, airlaid webs tend to be isotropic and highly porous. Similarly, due to the randomly oriented fibers, airlaid webs can have a high thickness. Airlaid webs can be formed from fibers that cannot be carded (e.g., short fibers).

[0039] In one embodiment, the outer porous nonwoven web can include at least one spunbond web. Spunbond webs are formed by entangling fibers and depositing the fibers onto a belt. The belt then transports the fibers to a device that bonds them (e.g., thermally, mechanically, or chemically). Generally, in spunbond webs, the fibers are randomly oriented, although the fibers may be slightly biased toward the direction of belt movement. Due to the random fiber orientation, spunbond webs tend to be isotropic and exhibit high porosity. Similarly, due to the random fiber orientation, spunbond webs can exhibit high thickness. Spunbond webs can exhibit relatively good water absorption. Spunbond webs can exhibit lower durability than at least some of the nonwoven webs disclosed herein. In one specific example, the nonwoven web can be a spunbond web when the outer porous material includes bamboo, because spunbond webs that include bamboo exhibit better fluid permeability, better wicking properties, and retain less bodily fluids than spunbond webs that include at least some other materials or that include bamboo in at least some other nonwoven webs.

[0040] In one embodiment, the outer porous nonwoven web can include at least one spunlaced web. Spunlaced webs are formed by providing a sheet or carded web containing randomly oriented fibers. A high-pressure water jet, generally parallel to the thickness of the sheet, is directed against the sheet. Similar to needlepunched webs, the high-pressure water jet displaces some of the fibers from the exterior to the interior of the sheet, forming columns. Thus, spunlaced webs can function similarly to needlepunched webs; i.e., spunlaced webs can be more isotropic than carded webs and contain dimples. However, spunlaced webs can exhibit at least one of a lower density, a higher thickness, or a lower basis weight than needlepunched webs. Thus, spunlaced webs can be more delicate (e.g., less durable or softer) than needlepunched webs. A more delicate spunlaced web can be more comfortable against a patient's skin than a needlepunched web.

[0041] In one embodiment, the nonwoven web may include at least one vertically wrapping nonwoven fabric. The vertically wrapping nonwoven fabric is formed by stacking sheets vertically, so that the cross section of the vertically wrapping nonwoven fabric along a plane parallel to the thickness and length of the vertically wrapping nonwoven fabric exhibits a periodic wavy (e.g., sinusoidal) structure. Due to the folds in the sheets, the fibers of the nonwoven web are preferentially oriented vertically between the folds, and the fibers at the folds are preferentially oriented horizontally. Therefore, the vertically wrapping nonwoven fabric absorbs body fluids in both horizontal and vertical directions. Furthermore, due to the vertically oriented fibers, the vertically wrapping nonwoven fabric is resistant to collapse even under high vacuum pressure. Similarly, due to the vertically oriented fibers, the vertically wrapping nonwoven fabric also exhibits excellent elastic recovery and localized deformation when a force generally parallel to the vertically oriented fibers is applied. The elastic recovery and localized deformation minimize the likelihood of the nonwoven material collapsing when both suction and external forces are applied to the nonwoven web (e.g., when placed on or pressed against the surface of the fluid collection assembly 100), and increase the likelihood that any collapse will be localized and temporary. Vertical wrapping nonwovens may also exhibit low density and are highly moldable. Vertical wrapping nonwovens can exhibit any suitable thickness by increasing or decreasing the distance between the pleats.

[0042] In one embodiment, the outer porous nonwoven web can include at least one horizontally wrapped nonwoven. The horizontally wrapped nonwoven is formed by stacking sheets horizontally. Due to the pleats in the sheet, the fibers of the nonwoven web are preferentially oriented vertically between the pleats, and the fibers in the pleats are preferentially oriented horizontally. Therefore, the horizontally wrapped nonwoven absorbs body fluids in both horizontal and vertical directions. The horizontally wrapped nonwoven can be made thicker simply by increasing the number of folds formed in it.

[0043] In one embodiment, the outer porous material nonwoven web can include at least one cross-wrapped nonwoven. Cross-wrapped nonwovens are substantially similar to horizontally wrapped nonwovens, except that each layer is not parallel to the adjacent layer. Instead, each layer extends at an angle relative to the preceding layer, which causes the cross-wrapped nonwoven to exhibit more isotropic properties than the horizontally wrapped nonwoven, particularly when the horizontally wrapped and cross-wrapped nonwovens are formed from carded webs.

[0044] Currently, carded webs, needlepunched webs, airlaid webs, spunlaced webs, spunbonded webs, vertically wrapped nonwoven webs, horizontally wrapped nonwoven webs, and cross-wrapped nonwoven webs are considered suitable nonwoven webs for inclusion in the outer porous material. However, it is known that the outer porous material can include one or more nonwoven webs other than carded webs, needlepunched webs, airlaid webs, and spunlaced webs. In one example, the outer porous material can include a wetlaid web, even though wetlaid webs may exhibit lower durability compared to the other nonwoven webs disclosed herein. In one example, the outer porous material can include a meltblown nonwoven web, although such nonwoven webs may have too low a void volume for some applications.

[0045] In one embodiment, the outer porous material may include a woven fabric instead of or in addition to a nonwoven web. Forming the outer porous material from a woven material may increase the durability of the porous material 110 compared to when the outer porous material is formed from a nonwoven material. However, forming the outer porous material from a woven material may reduce the compressibility of the porous material 110, which may make the porous material 110 more uncomfortable and may make it more difficult to conform the porous material 110 to the vaginal area to limit leakage. Additionally, forming a woven outer porous material is more difficult than forming a nonwoven porous material. Therefore, using a woven outer porous material may create logistical challenges, increase manufacturing difficulties, and increase costs.

[0046] Selecting outer layer 111 to include an outer porous material facilitates the flow of bodily fluid therethrough. In other words, the outer porous material facilitates relatively rapid flow of bodily fluid from the outer surface of outer layer 111 adjacent the urethral meatus to the inner surface of outer layer 111 adjacent inner layer 112. The relatively rapid flow of bodily fluid through the outer porous material allows for rapid flow of bodily fluid into inner layer 112. It has surprisingly been found that the outer porous material allows for rapid flow of bodily fluid from the outer porous material into inner layer 112, even when inner layer 112 includes a hydrophobic material.

[0047] The outer layer 111 can be disposed on the outer surface of the inner layer 112. In one embodiment, the outer layer 111 is disposed on the surface of the inner layer 112 in a manner that prevents or at least minimizes the formation of air gaps between the outer layer 111 and the inner layer 112. As used herein, an air gap refers to an unoccupied space between the outer layer 111 and the inner layer 112 that is significantly larger (e.g., at least 5 times larger, or at least 10 times larger) than the sum of the average pore sizes of the outer layer 111 and the inner layer 112. In one example, the outer layer 111 is disposed on the surface of the inner layer 112 such that at most 10% (e.g., at most 7.5%, at most 5%, at most 3%, at most 2%, or at most 1%) of the surface area of ​​the inner layer 112 adjacent to the outer layer 111 has an air gap adjacent to the outer layer 111. As discussed above, it has been found that bodily fluid received by a porous material outside the outer layer 111 flows relatively freely from the outer porous material into the adjacent porous material. However, air gaps between the outer layer 111 and the inner layer 112 create a barrier that inhibits bodily fluids from flowing through the outer layer 111 and the inner layer 112. Therefore, preventing or at least minimizing the formation of air gaps between the outer layer 111 and the inner layer 112 improves the flow of bodily fluids between the outer layer 111 and the inner layer 112. In one embodiment, the outer layer 111 can be tightly wrapped around the inner layer 112 to prevent the formation of air gaps between the two.

[0048] The inner layer 112 is separate from the outer layer 111. The outer layer 111 can be formed from a relatively collapsible, thin, or otherwise easily deformable material such that the inner layer 112 is configured to support the outer layer 111. For example, the inner layer 112 can be positioned such that the outer layer 111 is disposed between the inner layer 112 and the fluid-impermeable barrier 102. In that manner, the inner layer 112 can support the outer layer 111 and maintain its position. The inner layer 112 can include any material that can wick, absorb, adsorb, or otherwise enable fluid transport of bodily fluids, such as any of the fluids in the outer porous material disclosed hereinabove. For example, the outer porous material, when used as the inner layer 112, can be used in a denser, stiffer form than in the outer layer 111. The inner layer 112 can be formed from any fluid-permeable material that is less likely to deform than the outer layer 111. For example, inner layer 112 can include a porous polymer (e.g., nylon, polyester, polyurethane, polyethylene, polypropylene, polyvinyl chloride, etc.) structure or an open-cell foam. In one example, inner layer 112 can include spun nylon fibers, polyurethane foam, polyethylene foam, or polyvinyl chloride foam. In some examples, inner layer 112 can include a nonwoven material (e.g., a vertical nonwoven web or any other nonwoven web disclosed herein) or a woven material. In some examples, inner layer 112 can be formed from a natural material such as cotton, wool, silk, bamboo, or a combination thereof. In such examples, the inner layer 112 can have a coating to prevent or limit fluid absorption into the material, such as a water-repellent coating. In some examples, inner layer 112 can be formed from cloth, felt, gauze, or a combination thereof.

[0049] In one embodiment, the inner layer 112 can be configured to wick any bodily fluid away from the outer layer 111, thereby preventing the bodily fluid from escaping the cavity 104. The permeability characteristics referred to herein may be wicking, capillary action, diffusion, or other similar properties or processes, and are referred to herein as "permeable" and / or "wicking." Such "wicking" and / or "permeable" characteristics may not include absorption of bodily fluid into at least a portion of the inner layer 112, such as not including adsorption of the bodily fluid into the inner layer 112. In other words, it may occur that the bodily fluid is not substantially absorbed or incorporated into the material after the material has been exposed to the bodily fluid and has been removed from the bodily fluid for a period of time. While no absorption or incorporation is desired, the term "substantially no absorption" includes nominal amounts such as less than about 30 wt% of the dry weight of the inner layer 112 and / or incorporation (e.g., absorbency) of bodily fluids into the inner layer 112, such as less than about 20 wt%, less than about 15 wt%, less than about 10 wt%, less than about 7 wt%, less than about 5 wt%, less than about 3 wt%, less than about 2 wt%, less than about 1 wt%, or less than about 0.5 wt% of the dry weight of the inner layer 112. The inner layer 112 can also wick bodily fluids generally toward the interior of the cavity 104, as discussed in more detail below. In one embodiment, the inner layer 112 can include at least one absorbent or adsorbent material.

[0050] In one embodiment, at least a portion of the inner layer 112 can be hydrophobic. The inner layer 112 can be hydrophobic if it exhibits a contact angle with water (a major component of bodily fluids) greater than about 90°, such as within the range of about 90° to about 120°, about 105° to about 135°, about 120° to about 150°, about 135° to about 175°, or about 150° to about 180°. The hydrophobic nature of the inner layer 112 can limit the absorption, adsorption, and incorporation of bodily fluids into the inner layer 112, thereby reducing the amount of bodily fluid retained within the inner layer 112. The reduced hydrophobicity of the inner layer 112 can facilitate the porous material 110 receiving bodily fluids from the urethral meatus, while the hydrophobic nature of the inner layer 112 limits the amount of bodily fluid retained within the porous material 110.

[0051] The inner layer 112 can exhibit a thickness (e.g., radius and / or diameter) of about 1 mm or more, about 2 mm or more, about 4 mm or more, about 6 mm or more, about 8 mm or more, about 10 mm or more, about 12 mm or more, about 14 mm or more, about 16 mm or more, about 18 mm or more, about 20 mm or more, about 22 mm or more, about 25 mm or more, or in a range of about 1 mm to about 4 mm, about 2 mm to about 6 mm, about 4 mm to about 8 mm, about 6 mm to about 10 mm, about 8 mm to about 12 mm, about 10 mm to about 14 mm, about 12 mm to about 16 mm, about 14 mm to about 18 mm, about 16 mm to about 20 mm, about 18 mm to about 22 mm, or about 20 mm to about 25 mm. Generally, increasing the thickness of the inner layer 112 increases the amount of bodily fluid that can be temporarily stored therein or flow therethrough, thereby reducing the likelihood of leakage occurring in the fluid collection assembly 100. However, increasing the thickness of the inner layer 112 may reduce the suction force exerted on the cavity 104, which may make it difficult to position the fluid collection assembly 100 adjacent the urethral meatus.

[0052] In one embodiment, the inner layer 112 includes at least one inner porous material. Herein, the inner porous material includes at least one of a vertically wrapped nonwoven material, polyurethane foam, polyvinyl chloride foam, or polyethylene foam. The inner porous material can quickly receive bodily fluids from an individual, even if the individual excretes a large amount of bodily fluid in a short period of time. In one example, the inner porous material can facilitate the movement of bodily fluids through the cavity of the fluid collection assembly to an outlet (e.g., a fluid outlet or an inlet of a conduit disposed through the fluid outlet), thereby allowing the porous material 110 to remain dry. Furthermore, it has surprisingly been found that bodily fluids received within the outer porous material can easily flow from the outer porous material into the inner porous material, which draws bodily fluids from the outer porous material that would otherwise remain within the outer porous material.

[0053] If the inner porous material comprises foam (i.e., at least one of polyurethane foam, polyethylene foam, or polyvinyl chloride foam), the inner porous material has about 5 pores / cm 2 ~7 small holes / cm 2 , approximately 6 small holes / cm 2 ~approximately 8 small holes / cm 2 , approximately 7 small holes / cm 2 ~approximately 9 holes / cm 2 , approximately 8 small holes / cm 2 ~approximately 10 holes / cm 2 , approximately 9 small holes / cm 2 ~approximately 11 pores / cm 2 , approximately 10 small holes / cm 2 ~approximately 12 holes / cm 2 , approximately 11 small holes / cm 2 ~approximately 13 pores / cm 2 , approximately 12 small holes / cm 2 ~approximately 14 holes / cm 2 , approximately 13 small holes / cm 2 ~approximately 15 holes / cm 2 , approximately 14 small holes / cm 2 ~approximately 16 holes / cm 2 , approximately 15 small holes / cm 2 ~approximately 17 pores / cm 2 , approximately 16 small holes / cm 2 ~approximately 18 pores / cm 2 , approximately 17 small holes / cm 2 ~approximately 19 pores / cm 2 , or approximately 18 pores / cm 2 ~approximately 20 holes / cm 2 Approximately 5 small holes / cm 2 ~approximately 20 holes / cm 2 Generally, foam pores / cm 2 Increasing the number of pores / cm of foam increases the number of interconnected pores formed within the porous material, increasing the amount of fluid that can be stored within the foam and the rate at which fluid can flow through it. However, 2 As the number of pores increases, the strength of the foam decreases. 2can be selected based on balancing these factors.

[0054] If the inner porous material comprises foam (i.e., at least one of polyurethane foam, polyethylene foam, or polyvinyl chloride foam), the inner porous material has a resistance of about 75 kg / m 3 ~about 90kg / m 3 , about 80kg / m 3 ~about 100kg / m 3 , about 90kg / m 3 ~Approx. 110kg / m 3 , about 100kg / m 3 ~Approx. 120kg / m 3 , about 110kg / m 3 ~Approx. 130kg / m 3 , about 120kg / m 3 ~Approx. 140kg / m 3 , about 130kg / m 3 ~Approx. 150kg / m 3 , about 140kg / m 3 ~Approx. 160kg / m 3 , about 150kg / m 3 ~Approx. 170kg / m 3 , about 160kg / m 3 ~Approx. 180kg / m 3 , about 170kg / m 3 ~Approx. 190kg / m 3 , or approximately 180 kg / m 3 ~about 200kg / m 3 Approximately 75 kg / m 3 ~about 200kg / m 3 The porous material 110 may have a density of 0.05 ...

[0055] If the inner porous material contains a vertically wrapped nonwoven material, the inner porous material is approximately 50 kg / m 2 ·cm or more, approximately 75kg / m 2 ·cm or more, approximately 100kg / m 2 ·cm or more, approximately 125kg / m 2 ·cm or more, approximately 150kg / m 2 ·cm or more, approximately 175kg / m 2 ·cm or more, approximately 200kg / m 2 ·cm or more, approximately 250kg / m 2 ·cm or more, approximately 300kg / m 2 cm or more, or approximately 50 kg / m 2 ·cm ~ approx. 100kg / m 2 ·cm, approx. 75kg / m 2 ·cm ~ approx. 125kg / m 2 ·cm, approx. 100kg / m 2 ·cm ~ approx. 150kg / m 2 ·cm, approx. 125kg / m 2 ·cm ~ approx. 175kg / m 2 ·cm, approx. 150kg / m 2 ·cm ~ approx. 200kg / m 2 ·cm, approx. 175kg / m 2 ·cm ~ approx. 250kg / m 2 cm, or approximately 200 kg / m 2 ·cm ~ approx. 300kg / m 2 The porous material 110 may have a density in the range of 0.1-1 / 2 cm. Generally, increasing the density of the inner porous material increases the strength of the inner porous material. However, increasing the density of the inner porous material may decrease the porosity of the inner porous material, thereby decreasing the amount of bodily fluid that can be temporarily stored within the porous material 110 and decreasing the flow rate of bodily fluid through the inner porous material. Therefore, the density of the inner porous material may be selected based on balancing the desired density, porosity, and flow rate of bodily fluid through the inner porous material.

[0056] In some embodiments, one of the outer layer 111 or the inner layer 112 can be omitted from the porous material 110. In some embodiments, one or more additional layers can be provided instead of or in addition to at least one of the outer layer 111 or the inner layer 112.

[0057] The porous material 110 may at least substantially completely fill the portion of the cavity 104 not occupied by the conduit 114. In some embodiments, the porous material 110 may not substantially completely fill the portion of the cavity 104 not occupied by the conduit 114. In such embodiments, the fluid collection assembly 100 includes a reservoir 120 disposed within the cavity 104.

[0058] The reservoir 120 is a substantially unoccupied portion of the cavity 104. The reservoir 120 may be defined between the fluid-impermeable barrier 102 and the porous material 110. Bodily fluid present in the cavity 104 may flow through the porous material 110 to the reservoir 120. The reservoir 120 may hold bodily fluid therein.

[0059] Bodily fluid within the cavity 104 can flow through the porous material 110 to the reservoir 120. The fluid-impermeable barrier 102 can retain the bodily fluid within the reservoir 120. The reservoir 120 is shown in the distal end region 122, but can be located in any portion of the cavity 104, such as the proximal end region 124. The reservoir 120 can be located in a portion of the cavity 104 that is designed to be low in relation to the gravity of the fluid collection assembly when the fluid collection assembly is attached.

[0060] In some embodiments (not shown), the fluid collection assembly 100 may include multiple reservoirs, such as a first reservoir located in a portion of the cavity 104 closest to the inlet of the conduit 114 (e.g., distal end region 122) and a second reservoir located in a portion of the cavity 104 at or adjacent to the proximal end region 124. In another embodiment, the porous material 110 may be spaced apart from at least a portion of the conduit 114, and the reservoir 120 may be the space between the porous material 110 and the conduit 114.

[0061] The conduit 114 can be at least partially disposed within the cavity 104. The conduit 114 can be used to remove bodily fluids from the cavity 104. The conduit 114 includes at least one wall defining an inlet 116, an outlet (not shown) downstream from the inlet 116, and a passageway. The outlet of the conduit 114 can be operably coupled to a vacuum source, such as a vacuum pump, for drawing fluid from the cavity 104 through the conduit 114. For example, the conduit 114 can extend from the proximal end region 124 into the fluid-impermeable barrier 102 and can extend to the distal end region 122 adjacent to the reservoir 120 therein, such that the inlet 116 is in fluid communication with the reservoir 120. The conduit 114 fluidly connects the cavity 104 to a fluid reservoir (not shown) or a vacuum source (not shown).

[0062] The conduit 114 can extend through a lumen within the porous material 110. In one embodiment, the conduit 114 extends from the fluid outlet 108 through the lumen to a location proximate to the reservoir 120. In such an embodiment, the inlet 116 may not extend into the reservoir 120; instead, the inlet 116 may be located within or at a terminal end of the porous material 110. For example, the end of the conduit 114 may be flush with or embedded within the porous material 110. In one embodiment, the conduit 114 is at least partially located within the reservoir 120, and the inlet 116 may extend into or be located within the reservoir 120. Bodily fluid collected within the fluid collection assembly 100 can be removed from the cavity 104 via the conduit 114.

[0063] By locating the inlet 116 at or near a location that is expected to be a gravitational low point in the cavity 104 when worn by an individual, the conduit 114 can receive more bodily fluid than if the inlet 116 were located in another location, reducing conditions similar to stagnation (e.g., stagnant bodily fluids that can lead to microbial growth and foul odors). For example, bodily fluids within the porous material 110 can flow in any direction due to capillary forces. However, bodily fluids may exhibit a preference to flow in the direction of gravity, particularly when the porous material 110 is at least partially filled with bodily fluid. Thus, one or more of the inlets 116 or the reservoir 120 can be located in a location in the fluid collection assembly 100 that is expected to be a gravitational low point in the fluid collection assembly 100 when worn by an individual, such as the distal end region 122.

[0064] The inlet 116 and outlet of the conduit 114 are configured to fluidly couple (e.g., directly or indirectly) a vacuum source (not shown) to the cavity 104 (e.g., the reservoir 120). When a suction force is applied at the conduit 114 by the vacuum source ( FIG. 3 ), bodily fluid within the cavity 104 (e.g., at the distal end region 122, such as in the reservoir 120) can be drawn into the inlet 116 and through the conduit 114 and out of the fluid collection assembly 100. In some embodiments, the conduit 114 can be frosted or opaque to reduce the visibility of bodily fluid therein.

[0065] As described above, the conduit 114 can be configured to be at least insertable into the cavity 104. In one embodiment, the conduit 114 can be positioned in the cavity 104 such that the terminal end of the conduit 114 is separated from the fluid-impermeable barrier 102 or other components of the fluid collection assembly 100 that may at least partially obstruct or block the inlet 116. Additionally, the inlet 116 of the conduit 114 can be offset relative to the terminal end of the porous material 110 such that the inlet 116 is closer to the proximal end region 124 of the fluid collection assembly 100 than the terminal end of the porous material 110. By offsetting the inlet 116 relative to the terminal end of the porous material 110 in this manner, the inlet 116 can receive bodily fluid directly from the porous material 110, drawing more bodily fluid from the porous material 110 into the conduit 114 through hydrogen bonding.

[0066] FIG. 2A is a perspective view of a fluid collection assembly 200, according to one embodiment. FIG. 2B is a cross-sectional schematic view of the fluid collection assembly 200 taken along plane 2B-2B shown in FIG. 2A. The fluid collection assembly 200 is an example of a female fluid collection assembly for receiving and collecting bodily fluids from a female. Except as otherwise disclosed herein, the fluid collection assembly is the same as or substantially similar to any fluid collection assembly disclosed herein. In one or more aspects, the fluid collection assembly 200 comprises a fluid-impermeable barrier 202 that is the same as or similar to any fluid-impermeable barrier disclosed herein. The fluid-impermeable barrier 202 at least defines a cavity 204, at least one opening 206, and a fluid outlet 208. The fluid collection assembly 200 also comprises at least one porous material 210 disposed within the cavity 204. The porous material 210 can, in one or more embodiments, be the same as or similar to any of the porous materials disclosed herein (e.g., the porous material 210 comprises an outer layer 211 comprising an outer porous material and an inner layer 212). The fluid collection assembly 200 can also comprise at least one conduit 214 partially disposed within the fluid outlet 208 that is configured to remove one or more bodily fluids from the cavity 204. The conduit 214 may not extend through the porous material 210.

[0067] In one embodiment, the fluid-impermeable barrier 202 may comprise a shell 226 and a connecting piece 228 secured to the shell 226. The shell 226 of the fluid collection assembly 200 comprises a proximal end region 224, a distal end region 222 opposite the proximal end region 224, a front side 230, and a back side 232 opposite the front side 230. Generally, during use, the distal end region 222 is closer to the individual's intergluteal cleft than the proximal end region 224 and the front side 230, which generally face the individual's vaginal region. The shell 226 may be formed from silicone, neoprene, a thermoplastic elastomer, or other fluid-permeable material.

[0068] In one embodiment, the shell 226 comprises one or more flanges. The flanges may provide more points for undergarments or other clothing to contact and press against the fluid collection assembly 200, thereby facilitating securing the fluid collection assembly 200 to an individual's vaginal area and improving patient comfort. In one embodiment, the flanges may comprise at least one of an upper flange 234 forming the proximal end region 224 and a lower flange 236 opposite the upper flange 234 forming the distal end region 222.

[0069] The body flange can extend from shell 226 a distance in the range of about 1 mm or more, about 3 mm or more, about 4 mm or more, about 5 mm or more, about 6 mm or more, about 7.5 mm or more, about 1 cm or more, about 1.25 cm or more, about 1.5 cm or more, about 1 cm or more, about 1.5 cm or more, about 3 cm or more, about 4 cm or more, about 5 cm or more, or about 1 mm to about 3 mm, about 1 mm to about 4 mm, about 3 mm to about 5 mm, about 4 mm to about 6 mm, about 5 mm to about 7.5 mm, about 6 mm to about 1 cm, about 7.5 mm to about 1.25 cm, about 1 cm to about 1.5 cm, about 1.25 cm to about 1 cm, about 1.5 cm to about 1.5 cm, about 1 cm to about 3 cm, about 1.5 cm to about 4 cm, or about 3 cm to about 5 cm. The distance that the flanges extend from the shell 226 can be selected based on the expected size of the individual's vaginal area (e.g., larger flanges for larger vaginal areas) or the expected rotational forces that will be exerted on the fluid collection assembly 200 during use. In some embodiments, at least some of the flanges may extend further from the shell 226 than other flanges. For example, as shown, the lower flange 236 may extend further from the fluid-impermeable barrier 202 than the upper flange 234, as a longer lower flange 236 may be more comfortable for some individuals.

[0070] In one embodiment, one or more flanges may present a concave curve with respect to the front side 230 of the shell 226. The concave curve of the flange may extend from the proximal end region 224 to the distal end region 222. Because the vaginal region is curved, the concave curve of the flange may allow the flange to better conform to the shape of the vaginal region. Having the flange conform to the shape of the vaginal region may make the fluid collection assembly 200 more comfortable by distributing pressure more evenly across the vaginal region, especially when the flange contacts the labia majora.

[0071] In one embodiment, the shell 226 may include a reservoir 238 at or near the distal end region 222. The reservoir 238 may extend outward from the front side 230 of the shell 226. During use, the reservoir 238 is configured to be at or near a gravitational low point of the porous material 210 or otherwise in fluid communication therewith. For example, the reservoir 238 may receive a portion of the porous material 210 therein. The reservoir 238 may receive at least some of the bodily fluid received by the porous material 210. The reservoir 238 may prevent or at least inhibit bodily fluid from leaking out of the fluid collection assembly 200. The reservoir 238 may include at least a portion of the connection piece 228 at least partially disposed therein.

[0072] In one embodiment, the shell 226 may define a recess configured to receive the conduit 214. The recess may extend from at or near the proximal end region 224 to at or near the distal end region 222, thereby allowing the conduit 214 to extend from at or near the individual's abdominal region to the connecting piece 228. In one embodiment, the recess may be configured such that the shell 226 surrounds and / or abuts less than 50% of the circumference of the conduit 214, thereby allowing the conduit 214 to move freely in and out of the recess during use. Allowing the conduit 214 to move freely in and out of the recess may facilitate positioning the fluid collection assembly 200 with the porous material 210 adjacent to the vaginal region, even if the conduit bends away from the vaginal region. Additionally, because movement of the porous material 210 can cause leakage, allowing the conduit 214 to move freely in and out of the recess may increase the likelihood that the porous material 210 will not move relative to the vaginal region even if the conduit 214 moves. In one embodiment, at least a portion of the recess can be configured such that the shell 226 surrounds and / or is adjacent to more than 50% of the circumference of the conduit 214 (e.g., between 51% and about 55%, between about 53% and about 57%, or between about 55% and about 60%). Surrounding more than 50% of the circumference of the conduit 214 can more securely attach the conduit 214 to the shell 226 and may allow the conduit 214 to provide additional structure to the shell 226. The percentage of the conduit 214 surrounded by and / or adjacent to the shell 226 can be selected such that the inherent resilience of the shell 226 and the conduit 214 allows the conduit 214 to easily snap into and out of the recess. Thus, the conduit 214 can be removed from the recess to facilitate positioning the porous material 210 adjacent the vaginal area or when the conduit 214 is moved.

[0073] As described above, the fluid-impermeable barrier 202 includes a connecting piece 228 that is attached to or integrally formed with the shell 226 (e.g., by adhesive, welding, an interference fit, etc.). The connecting piece 228 is positioned at or near the distal end region 222 of the shell 226, thereby allowing the connecting piece 228 to receive bodily fluids that flow to gravitationally lower points in the porous material 210. In one embodiment, a portion of the connecting piece 228 can be positioned within a reservoir 238 of the shell 226. In an embodiment not shown, the connecting piece 228 can form the reservoir 238 instead of the shell 226.

[0074] The connection piece 228 is configured to be connected to the conduit 214. As such, the connection piece 228 may define a fluid outlet 208 that is attached to or otherwise configured to be in fluid communication with the conduit 214. The fluid outlet 208 may be disposed adjacent to the rear side 232 of the fluid-impermeable barrier 202. The connection piece 228 may also define a conduit 240 (e.g., a tube) that is configured to allow the porous material 210 and the reservoir 238 to be in fluid communication with the conduit 214.

[0075] In one embodiment, at least a portion of connecting piece 228 may exhibit greater stiffness than shell 226. Increasing the stiffness of connecting piece 228 relative to shell 226 may facilitate attaching conduit 214 to connecting piece 228. In one example, connecting piece 228 may exhibit greater stiffness than shell 226 if it is formed from a material that exhibits at least one of a greater Young's modulus (i.e., modulus of elasticity), yield strength, or ultimate tensile strength than the material forming shell 226. In one example, connecting piece 228 may exhibit greater stiffness than shell 226 if it exhibits a greater thickness than shell 226.

[0076] 1A-2B are examples of female fluid collection assemblies configured to collect bodily fluids from women (e.g., collect urine from the female urethra). However, the fluid collection assemblies, fluid collection systems, and fluid collection methods disclosed herein may include male fluid collection assemblies that are shaped, dimensioned, and otherwise configured to collect bodily fluids from men (e.g., collect urine from the male urethra). Figure 3 is a cross-sectional schematic diagram of a male fluid collection assembly 300, according to one embodiment.

[0077] The fluid collection assembly 300 includes a base 342 (e.g., an annular base) and a sheath 344. The base 342 is sized, shaped, and made of a material to be coupled to the skin surrounding the male urethral opening (e.g., the penis) and to be positioned with the male urethral opening therethrough. For example, the base 342 can define an aperture 346. The base 342 can be sized and shaped to be placed around the male urethral opening (e.g., around or on the penis), and the aperture 346 can be configured to be positioned with the male urethral opening therethrough. The base 342 can also be sized, shaped, made of a material, or otherwise configured to be coupled to (e.g., adhesively attached, such as with a hydrogel adhesive) the skin around the male urethral opening (e.g., around the penis). In one embodiment, the base 342 can assume the general shape or contour of the skin surface to which the base 342 is selected to be coupled. The base 342 can be flexible, allowing it to conform to any shape of the skin surface. The base 342 may include a laterally (e.g., radially) extending flange 347. The base 342 also defines a hollow region configured to receive (e.g., seal against) the sheath 344. For example, the base 342 may include a longitudinally extending flange 348 extending upwardly therefrom. The longitudinally extending flange 348 may be sufficiently long (e.g., at least 0.25 cm long, 1 cm long, at least 3 cm long, or at least 5 cm long) to prevent the sheath 344 from being accidentally removed from the base 342. The base 342 is located at the proximal end region 324 (relative to the wearer) of the fluid collection assembly 300.

[0078] The sheath 344 includes (e.g., can be formed from) a fluid-impermeable barrier 302 that is sized and shaped to fit within the hollow region of the base 342. For example, the sheath 344 can be generally tubular or cup-shaped, as shown. The generally tubular or cup-shaped fluid-impermeable barrier 302 can at least partially define the outer surface of the sheath 344. In one or more embodiments, the fluid-impermeable barrier 302 can be similar to or identical to any fluid-impermeable barrier disclosed herein. For example, the fluid-impermeable barrier 302 can be constructed of any material disclosed herein for a fluid-impermeable barrier. The fluid-impermeable barrier 302 at least partially defines a cavity 304. For example, the inner surface of the fluid-impermeable barrier 302 at least partially defines the perimeter of the cavity 304. The cavity 304 at least temporarily retains bodily fluid therein. The fluid-impermeable barrier 302 may also define an opening 306 extending therethrough that is configured to be positioned for the male urethral meatus to pass through.

[0079] As shown, the fluid collection assembly 300 can include a porous material 310 therein. The porous material 310 can, in one or more embodiments, be similar to or identical to any of the porous materials disclosed herein. For example, the porous material 310 can include at least one of an outer layer 311 or an inner layer 312. The outer layer 311 can include an outer porous material.

[0080] The sheath 344 also includes at least a portion of the conduit 314 therein, such as being at least partially disposed within the cavity 304. For example, the conduit 314 may extend from the sheath 344 at a distal end region 322 to a proximal end region 324 that is proximate to at least the opening 306. The proximal end region 324 may be disposed on or near the surface of the skin around the male urethral opening (e.g., on the penis or the surrounding pubic area). Thus, when an individual is lying on their back, bodily fluids (e.g., urine) may collect near the opening 306 that contacts the subject's skin. The bodily fluids may be removed from the cavity 304 via the conduit 314.

[0081] In some embodiments, the fluid-impermeable barrier 302 may be constructed of a material and / or have a thickness that allows it to collapse when the sheath 344 is placed under a vacuum so as to remove air from around the penis within the fluid collection assembly 300 during use. In such embodiments, the conduit 314 may extend only to or into the distal end region 322 of the cavity 304 (e.g., without extending therethrough to the region adjacent the opening 306). In such embodiments, urine may be collected and removed from the fluid collection assembly 300.

[0082] In one embodiment, some portions of cavity 304 may be substantially empty due to variations in the size and stiffness of male penises. However, in some embodiments, the outermost region of cavity 304 (e.g., the periphery of the interior region of sheath 344) may comprise porous material 310. For example, porous material 310 may be adhered to the inner surface of fluid-impermeable barrier 302. Porous material 310 may be positioned (e.g., at the distal end of cavity 304) to attenuate the flow of urine from the male urethral opening, thereby preventing splashing, and / or to direct bodily fluids to selected regions of cavity 304. Because cavity 304 is substantially empty (e.g., substantially all of cavity 304 forms a reservoir), bodily fluids tend to pool in gravitationally low areas of cavity 304. The gravity low point of cavity 304 may be where the individual's skin abuts fluid collection assembly 300, a corner formed in sheath 344, or another suitable location, depending on the wearer's body position.

[0083] Porous material 310 may comprise one or more of an outer layer 311 or an inner layer 312. In one or more embodiments, outer layer 311 and inner layer 312 may be similar to or identical to any of the fluid-permeable membranes and fluid-permeable supports, respectively, disclosed herein. At least one of outer layer 311 or inner layer 312 may be disposed between fluid-impermeable barrier 302 and a penis inserted into cavity 304. Outer layer 311 may be disposed between fluid-impermeable barrier 302 and a penis inserted into cavity 304, such as between inner layer 312 and the wearer's penis as shown. Inner layer 312 may be disposed between outer layer 311 and fluid-impermeable barrier 302. The inner surface of fluid-impermeable barrier 302, optionally including an end of cavity 304 substantially opposite opening 306, may be coated with one or both of outer layer 311 and inner layer 312. The inner layer 312 or the outer layer 311 can be attached (e.g., glued) to the fluid-impermeable barrier 302. The inner layer 312 or the outer layer 311 can be attached to each other. In some embodiments, the porous material 310 only comprises the outer layer 311 or the inner layer 312.

[0084] The fluid collection assembly 300 includes a cap 350 at the distal end region 322. The cap 350 defines an internal conduit through which bodily fluids can be removed from the fluid collection assembly 300. The internal conduit is in fluid communication with the cavity 304. The cap 350 can be disposed over at least a portion of the distal end region 322 of one or more of the fluid-impermeable barrier 302 or the porous material 310. The cap 350 can be made of a polymer, rubber, or any other fluid-impermeable material. The cap 350 can be attached to one or more of the fluid-impermeable barrier 302, the porous material 310, or the conduit 314. The cap 350 can cover at least a portion of the distal end region 322 of the fluid collection assembly 300. The cap 350 can define a fluid outlet 308 that is sized and configured to receive the conduit 314 and form a fluid seal therewith. The conduit 314 can extend a distance, such as through the cap 350 or through the cap 340 to the porous material 310, through the porous material 310, or to a point spaced apart from the porous material 310. In one embodiment, as shown in FIG. 2B, the internal conduit of the cap 350 can define a reservoir 320 therein.

[0085] Reservoir 320 is an unoccupied portion of the device, such as cap 350, and is free of other materials. In some embodiments, reservoir 320 is at least partially defined by porous material 310 and cap 350. During use, bodily fluid within cavity 304 can flow through porous material 310 to reservoir 320. Reservoir 320 can store at least some of the bodily fluid therein and / or position the bodily fluid for removal by conduit 314. In some embodiments, at least a portion of porous material 310 extends continuously between at least a portion of the opening of the internal conduit and cavity 304, allowing any bodily fluid to be drawn from the opening directly into reservoir 320.

[0086] In some embodiments (not shown), the fluid impermeable barrier 302 can be disposed on or over the cap 350 to enclose the cap 350 within the cavity 304 .

[0087] In some embodiments, the sheath 344 may include the conduit 314 therein, such that at least a portion of the conduit 314 is disposed within the cavity 304. For example, the conduit 314 may extend from the sheath 344 to at least a region proximate the opening 306. The inlet of the conduit 314 may be disposed adjacent to the annular base 352. The inlet of the conduit 314 may be disposed adjacent to or proximate a gravity low point of the cavity 304, such as adjacent to the annular base 352. For example, the inlet may extend to the same position as the opening 306 or may be offset from the opening 306. In some embodiments, the inlet may be disposed adjacent to the distal end region 322 of the sheath 344 (substantially opposite the opening 306).

[0088] The proximal end region 324 can be positioned near or on the skin around the male urethral opening (e.g., around the penis), and the inlet of the conduit 314 can be located within the proximal end region 324. The outlet of the conduit 314 can be directly or indirectly coupled to a vacuum source. Thus, bodily fluids can be removed from the proximal end region 324 of the cavity 304 via the conduit 314.

[0089] The base 342, the sheath 344, the cap 350, and the conduit 314 may be attached together using any suitable method. For example, at least two of the base 342, the sheath 344, the cap 350, and the conduit 314 may be attached together using at least one of an interference fit, adhesive, stitching, welding (e.g., ultrasonic bonding), tape, any other suitable method, or a combination thereof.

[0090] In some embodiments (not shown), the fluid collection assembly 300 can have a one-piece design in which one or more of the sheath 344, base 342, and cap 350 are integrally formed as a single piece.

[0091] As also shown, the conduit 314 can be at least partially disposed with the cavity of the fluid collection assembly. The conduit 314 can extend from the distal end region 322 to the proximal end region 324. For example, the conduit 314 can extend through the cap 350 adjacent the base 342. The conduit 314 is sized and positioned to be coupled to a fluid reservoir or a vacuum source ( FIG. 5 ). The outlet of the conduit 314 can be operably coupled, directly or indirectly, to a vacuum source. The inlet 316 of the conduit 314 can be positioned within the cavity 304 at a location that is expected to be a low point in the gravity of the fluid collection assembly during use. By positioning the inlet 316 at a location that is expected to be a low point in the gravity of the fluid collection assembly when worn by a user, bodily fluid introduced into the cavity 304 can be removed via the conduit 314 to prevent bodily fluid from accumulating or stagnating within the cavity 304.

[0092] In some embodiments, the vacuum source may be located remotely from the fluid collection assembly 300. In such embodiments, the conduit 314 may be fluidly connected to a fluid reservoir that may be located between the vacuum source and the fluid collection assembly 300.

[0093] FIG. 4 is a cross-sectional schematic diagram of a fluid collection assembly 400, according to one embodiment. The fluid collection assembly 400 is an example of a male fluid collection assembly; however, in some embodiments, the fluid collection assembly 400 can be used to receive bodily fluids from a female urethral opening. Except as otherwise disclosed herein, the fluid collection assembly 400 is the same as or substantially similar to any fluid collection assembly disclosed herein. The sheath 444 includes a fluid-impermeable barrier 402 formed at least in part from a first panel 454 and a second panel 456. The first panel 454 and the second panel 456 can be attached to each other or integrally formed together (e.g., exhibiting a single-piece construction). In one embodiment, as shown, the first panel 454 and the second panel 456 are separate sheets. The fluid-impermeable barrier 402 also defines a cavity 404 between the first panel 454 and the second panel 456, an opening 406 at the proximal end region 424 of the sheath 444, and a fluid outlet 408 at the distal end region 422 of the sheath 444. The sheath 444 also includes at least one porous material 410 disposed within the cavity 404.

[0094] The inner surface of the fluid-impermeable barrier 402 (e.g., the inner surfaces of the first panel 454 and the second panel 456) at least partially defines a cavity 404 within the fluid collection assembly 400. The fluid-impermeable barrier 402 temporarily stores bodily fluid within the cavity 404. The fluid-impermeable barrier 402 can be formed from any fluid-impermeable material disclosed herein. Thus, the fluid-impermeable barrier 402 substantially prevents bodily fluid from passing through the fluid-impermeable barrier 402.

[0095] In one embodiment, at least one of the first panel 454 and the second panel 456 is formed from an at least partially transparent, fluid-impermeable material, such as polyethylene, polypropylene, polycarbonate, or polyvinyl chloride. Forming at least one of the first panel 454 and the second panel 456 from an at least partially transparent, fluid-impermeable material allows a person (e.g., a medical practitioner) to examine the penis. In some embodiments, both the first panel 454 and the second panel 456 are formed from an at least partially transparent, fluid-impermeable material. Selecting at least one of the first panel 454 and the second panel 456 to be formed from an at least partially transparent, fluid-impermeable material allows the penis to be examined without removing the entire fluid collection assembly 400 from the area surrounding the penis. For example, the cavity 404 can include a penis-receiving region 458 configured to receive an individual's penis when extended into the cavity 104. Penis receiving area 458 can be defined by at least porous material 410 and at least a portion of the at least partially transparent material of first panel 454 and / or second panel 456. In other words, porous material 410 is positioned within cavity 404 such that when a penis is inserted into cavity 404 through opening 406, porous material 410 is not positioned between the penis and at least a portion of the transparent portions of first panel 454 and / or second panel 456. Porous material 410 is generally not transparent, and thus the portions of the at least partially transparent material of first panel 454 and / or second panel 456 that define penis receiving area 458 form a window that allows a person to look into penis receiving area 458 and examine the penis.

[0096] The fluid collection assembly 400 comprises a sheath 444 and a base 442. The base 442 is configured to be attached (e.g., permanently attached or configured to be permanently attached) to the sheath 444. The base 442 is also configured to be attached to the area surrounding the urethral opening (e.g., the penis) of an individual.

[0097] The opening 406 defined by the fluid-impermeable barrier 402 provides an access route for bodily fluids to enter the cavity 404 when the penis is buried and allows the penis to enter the cavity 404 (e.g., the penis-receiving area 458) when the penis is not buried. The opening 406 can be defined by the fluid-impermeable barrier 402 (e.g., an inner edge of the fluid-impermeable barrier 402). For example, the opening 406 can be formed in and extend through the fluid-impermeable barrier 402, thereby allowing bodily fluids to enter the cavity 404 from outside the fluid collection assembly 400.

[0098] The fluid-impermeable barrier 402 defines a fluid outlet 408 sized to receive a conduit 414. The conduit 414 is at least partially disposed within the cavity 404 and is otherwise in fluid communication with the cavity 404 through the fluid outlet 408. The fluid outlet 408 is sized and shaped to form an at least substantially fluid-tight seal with the conduit 414, thereby substantially preventing bodily fluids from escaping the cavity 404. In one embodiment, the fluid outlet 408 may be formed from portions of the first panel 454 and the second panel 456 that are not attached to or integrally formed together. In such an embodiment, the fluid-impermeable barrier 402 may not include a cap that is more rigid than the surrounding portions of the fluid-impermeable barrier 402, thereby facilitating the manufacture of the fluid collection assembly 400, reducing the number of parts used to form the fluid collection assembly 400, and reducing the time required to manufacture the fluid collection assembly 400. It is understood that while the absence of a cap may make it difficult to secure the conduit 414 to the fluid outlet 408 using an interference fit, it may still be possible to attach the conduit 414 to the fluid outlet 408. Thus, the conduit 414 may be attached to the fluid outlet 408 (e.g., the first panel 454 and the second panel 456) by adhesive, welding, or otherwise adhering the conduit 414 to the fluid outlet 408. Attaching the conduit 414 to the fluid outlet 408 may prevent leakage and may prevent the conduit 414 from being inadvertently detached from the fluid outlet 408. In one example, the conduit 414 may be attached to the fluid outlet 408 in the same manufacturing step that attaches the first panel 454 and the second panel 456 together. In one embodiment, the fluid collection assembly 400 includes a cap that exhibits greater rigidity than the surrounding fluid-impermeable barrier 402 portion. In such an embodiment, the cap may form the fluid outlet 408 .The cap can be selected to exhibit a maximum thickness that is less than, equal to, or slightly greater than (e.g., about 3 mm greater than) the thickness of the conduit 414 so as not to significantly affect the ability of the fluid-impermeable barrier 402 to lie flat.

[0099] As described above, the sheath 444 includes at least one porous material 410 exposed to the cavity 404. The porous material 410 can be the same as or substantially similar to any of the porous materials disclosed herein in one or more embodiments. For example, the porous material 410 can include an outer layer 411 including an outer porous material 411 and an inner layer 412. The porous material 410 can direct bodily fluids to one or more selected regions of the cavity 404, such as away from the penis and toward the fluid outlet 408. The porous material 410 can be formed from any of the porous materials disclosed herein. In one embodiment, the porous material 410 can be formed from one layer, two layers, or three or more layers. In one embodiment, the porous material 410 can be formed from a nonwoven material or a woven material (e.g., spun nylon fibers). In one embodiment, the porous material 410 can include at least one material that exhibits substantially no absorption or at least one absorbent or adsorbent material.

[0100] In one embodiment, the porous material 410 can be a sheet. Forming the porous material 410 as a sheet can facilitate manufacturing of the fluid collection assembly 400. For example, forming the porous material 410 as a sheet allows the first panel 454, the second panel 456, and the porous material 410 to each be a sheet. During manufacturing of the fluid collection assembly 400, the first panel 454, the second panel 456, and the porous material 410 can be stacked and then attached to one another in the same manufacturing step. For example, the porous material 410 can have the same dimensions as the first panel 454 and the second panel 456, or more preferably, a shape that is slightly smaller than the dimensions of the first panel 454 and the second panel 456. Thus, the porous material 410 can be attached to the first panel 454 and the second panel 456 by attaching them together along their respective outer edges. The porous material 410 may be slightly smaller than the first panel 454 and the second panel 456 so that the first panel 454 and / or the second panel 456 extend around the porous material 410 to prevent the porous material 410 from forming a passageway through the fluid-impermeable barrier 402 through which bodily fluids could escape. Additionally, attaching the porous material 410 to the first panel 454 and / or the second panel 456 may prevent the porous material 410 from significantly migrating within the cavity 404, such as by preventing the porous material 410 from clumping near the fluid outlet 408. In one embodiment, the porous material 410 may be attached (e.g., with an adhesive) to the first panel 454 or the second panel 456 before or after attaching the first panel 454 to the second panel 456. In one embodiment, the porous material 410 can simply be disposed within the cavity 404 without being attached to at least one of the first panel 454 or the second panel 456. In one embodiment, the porous material 410 can take on a shape other than a sheet, such as the shape of a hollow, generally cylindrical shape.

[0101] Generally, the sheath 444 has a generally flat shape when the penis is not present in the penis-receiving region 458 and the sheath 444 is resting on a flat surface. The sheath 444 has a generally flat shape because the fluid-impermeable barrier 402 is formed from the first panel 454 and the second panel 456, rather than being a generally tubular fluid-impermeable barrier. Furthermore, as described above, the porous material 410 may be a sheet, which also results in the sheath 444 having a generally flat shape. The sheath 444 may have a generally flat shape because the fluid collection assembly 400 may not include a relatively rigid ring or cap that is more rigid than the surrounding portion of the fluid-impermeable barrier 402. Such rings and caps may prevent the sheath 444 from having a generally flat shape. The sheath 444 is described as having a generally flat shape because the at least one porous material 410 may cause some ridges to form within the sheath 444 depending on the thickness of the porous material 410, the fluid outlet 408 and / or conduit 414 may cause ridges to form around them, or the base 442 may pull portions of the sheath 444 around itself. It is also recognized that the sheath 444 is conformable because during use the sheath 444 may be placed on an uneven surface (e.g., between the testicles, perineum, and / or thighs) and the sheath 444 may conform to those shaped surfaces; therefore, the sheath 444 may not have a generally flat shape during use.

[0102] The sheath 444's ability to have a generally flat shape when the penis is not present in the penis-receiving region 458 and the sheath 444 is resting on a flat surface allows the fluid collection assembly 400 to be used with buried and non-buried penises. For example, when the fluid collection assembly 400 is used with a buried penis, the penis does not extend into the penis-receiving region 458, causing the sheath 444 to lie relatively flat across the aperture 446 in the base 442. When the sheath 444 lies relatively flat across the aperture 446, the porous material 410 extends across the opening 406 and the aperture 446, providing close proximity to the buried penis. Thus, the porous material 410 receives and removes at least a substantial portion of the bodily fluids that would otherwise be retained against the individual's skin, thereby preventing or inhibiting bodily fluids draining from the buried penis from retaining against the individual's skin. The individual's skin therefore remains dry, thereby improving comfort when using the fluid collection assembly 400 and preventing aggravation of the skin condition. However, unlike other conventional fluid collection assemblies configured for use with buried penises, the fluid collection assembly 400 can also be used with non-buried penises, as it can still receive a non-buried penis within the penis-receiving region 458 even when the penis is fully erect. Additionally, the generally flat shape of the sheath 444 allows the fluid collection assembly 400 to be used more peacefully than if the sheath 444 were not generally flat, thereby avoiding potentially embarrassing developments.

[0103] When sheath 444 has a generally flat shape, porous material 410 occupies substantially all of cavity 404, and penis-receiving region 458 is collapsed (shown in an uncollapsed form in FIG. 4 for purposes of illustration showing penis-receiving region 458). In other words, sheath 444 may not define an area that is permanently unoccupied by porous material 410. When porous material 410 occupies substantially all of cavity 404, bodily fluids that are expelled into cavity 404 tend not to remain there for a significant period of time, as this could create hygiene issues, produce odor, and / or potentially expose an individual's skin to the bodily fluids, resulting in discomfort and aggravated skin conditions.

[0104] As described above, the first panel 454, the second panel 456, and the porous material 410 can be selected to be relatively flexible. The first panel 454, the second panel 456, and the porous material 410 are each relatively flexible enough to maintain their shape without support. The flexibility of the first panel 454, the second panel 456, and the porous material 410 allows the sheath 444 to have a generally flat shape, as described above. The flexibility of the first panel 454, the second panel 456, and the porous material 410 also allows the sheath 444 to conform to the shape of the penis as the penis changes size and shape (e.g., during an erection) and minimizes any unoccupied space within the cavity 404 where bodily fluids may accumulate.

[0105] As described above, the fluid collection assembly 400 includes a base 442 configured to attach to a sheath 444. For example, the base 442 is configured to be permanently attached to the sheath 444. The base 442 is configured to be permanently attached to the sheath 444, for example, if the fluid collection assembly 400 is provided with the base 442 permanently attached to the sheath 444, or if the base 442 is provided without being permanently attached to the sheath 444, but is configured to be permanently attached to the sheath 444 at some point in the future. Permanently attached means that the sheath 444 cannot be detached from the base 442 without damaging at least one of the sheath 444 or the base 442, using a blade to separate the sheath 444 from the base 442, and / or using a chemical to break down the adhesive attaching the sheath 444 to the base 442. The base 442 can be permanently attached to the sheath 444 using adhesive, sewing, heat welding, radio frequency welding, or ultrasonic bonding. In one embodiment, base 442 is configured to be reversibly attached to sheath 444. In one embodiment, base 442 is integrally formed with sheath 444.

[0106] The base 442 includes an aperture 446. The base 442 is permanently attached to the distal end region 422 of the sheath 444 such that the aperture 446 is aligned with the opening 406.

[0107] The base 442 is sized, shaped, and made of a material to interface with the skin surrounding the penis (e.g., the mons pubis, thighs, testicles, and / or perineum) and has the penis positioned therethrough. For example, the base 442 can define an aperture 446 configured to allow the penis to be positioned therethrough. In one embodiment, the base 442 can assume the general shape or contour of the skin surface against which the base 442 is configured to interface. The base 442 can be flexible, allowing the base 442 to conform to any shape of the skin surface and reduce tension on the skin surface. The base 442 can extend laterally beyond the sheath 444, thereby increasing the surface area of ​​an individual's skin to which the fluid collection assembly 400 can be attached, as compared to a substantially similar fluid collection assembly 400 without a base.

[0108] As described above, the fluid collection assembly 400 includes a conduit 414. The inlet 416 of the conduit 414 can be located near the distal end region 422 of the sheath 444, which is an expected gravitational low point of the cavity 404 when worn by an individual. By locating the inlet 416 at or near the distal end region 422 of the sheath 444, the conduit 414 can receive more bodily fluid than if the inlet of the conduit 414 were located elsewhere, reducing conditions similar to stagnation (e.g., stagnation of bodily fluids can lead to microbial growth and unpleasant odors).

[0109] 5 is a block diagram of a fluid collection system 560 for fluid collection, according to one embodiment. The fluid collection system 560 includes a fluid collection assembly 500, a fluid reservoir 562, and a vacuum source 564. The fluid collection assembly 500 may be identical to or substantially similar to any of the fluid collection assemblies disclosed herein. The fluid collection assembly 500, the fluid reservoir 562, and the vacuum source 564 may be fluidly coupled to one another via one or more conduits 514. For example, the fluid collection assembly 500 may be operably coupled to one or more of the fluid reservoir 562 or the vacuum source 564 via the conduit 514. Bodily fluid collected within the fluid collection assembly 500 may be removed from the fluid collection assembly 500 via the conduit 514 that protrudes into the fluid collection assembly 500. For example, the inlet of the conduit 514 may extend into the fluid collection assembly 500, such as to a reservoir therein. The outlet of the conduit 514 may extend into the fluid collection assembly 500 or into the vacuum source 564. A suction force may be introduced into the cavity of the fluid collection assembly 500 via the inlet of the conduit 514 in response to a suction (e.g., vacuum) force applied to the outlet of the conduit 514.

[0110] The suction force can be applied to the outlet of the conduit 514 either directly or indirectly by the vacuum source 564. The suction force can be applied indirectly via the fluid reservoir 562. For example, the outlet of the conduit 514 can be disposed within the fluid reservoir 562, and the additional conduit 514 can extend from the fluid reservoir 562 to the vacuum source 564. Thus, the vacuum source 564 can apply a suction force to the fluid collection assembly 500 via the fluid reservoir 562. The suction force can be applied directly via the vacuum source 564. For example, the outlet of the conduit 514 can be disposed within the vacuum source 564. The additional conduit 514 can extend from the vacuum source 564 to a location external to the fluid collection assembly 500, such as the fluid reservoir 562. In such an example, the vacuum source 564 can be disposed between the fluid collection assembly 500 and the fluid reservoir 562.

[0111] The fluid reservoir 562 is sized and shaped to hold a bodily fluid therein. The fluid reservoir 562 may include a bag (e.g., a drainage bag), a bottle or cup (e.g., a collection jar), or any other enclosed container for storing a bodily fluid, such as urine. In some embodiments, a conduit 514 may extend from the fluid collection assembly 500 and be attached to the fluid reservoir 562 at a first location thereon. An additional conduit 514 may be attached to the fluid reservoir 562 at a second location on its surface and may extend to and be attached to a vacuum source 564. Thus, a vacuum (e.g., suction force) may be drawn through the fluid collection assembly 500 via the fluid reservoir 562. Bodily fluid, such as urine, may be evacuated from the fluid collection assembly 500 using the vacuum source 564.

[0112] The vacuum source 564 may include one or more of a manual vacuum pump, an electric vacuum pump, a diaphragm pump, a centrifugal pump, a positive displacement pump, a magnetic drive pump, a peristaltic pump, or any pump configured to generate a vacuum. The vacuum source 564 may provide a vacuum or suction force to remove bodily fluids from the fluid collection assembly 500. In some embodiments, the vacuum source 564 may be powered by one or more of a power cord (e.g., connecting to a power socket), one or more batteries, or even a manual force (e.g., a manual vacuum pump). In some embodiments, the vacuum source 564 may be sized and configured to be mounted externally, on, or internally to the fluid collection assembly 500. For example, the vacuum source 564 may include one or more miniaturized pumps or one or more micropumps. The vacuum sources 564 disclosed herein may comprise one or more switches, buttons, plugs, remote controllers, or any other devices suitable for activating the vacuum source 564.

[0113] While various aspects and embodiments have been disclosed herein, other aspects and embodiments are contemplated. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting.

[0114] Terms of degree (e.g., "about," "approximately," "substantially," "roughly," etc.) refer to variations that are not significant structurally or functionally. In some embodiments, when a term of degree is included with a term referring to a quantity, the term of degree is interpreted to mean ±10%, ±5%, or +2% of the term referring to the quantity. In some embodiments, when a term of degree is used to modify a shape, the term of degree means that the shape modified by the term of degree has the appearance of the disclosed shape. For example, the term of degree can be used to mean that a shape may have rounded corners instead of sharp corners, may have curved edges instead of straight edges, may have one or more protrusions extending therefrom, may be oblong, may be identical to the disclosed shape, etc.

Claims

1. 1. A fluid collection assembly comprising: cavity, at least one opening; and fluid outlet a fluid-impermeable barrier defining at least at least one porous material disposed in the cavity, the at least one porous material having an outer layer and an inner layer, the outer layer comprising bamboo; A fluid collection assembly comprising:

2. 10. The fluid collection assembly of claim 1, wherein the bamboo material comprises at least one of natural bamboo and black bamboo.

3. 10. The fluid collection assembly of claim 1, wherein the outer layer comprises a spunbond nonwoven bamboo material.

4. 10. The fluid collection assembly of claim 1, wherein the outer layer material comprises a woven material.

5. 10. The fluid collection assembly of claim 1, wherein the outer layer comprises a nonwoven material.

6. 10. The fluid collection assembly of claim 1, wherein the outer layer comprises a vertical wrapping nonwoven.

7. 10. The fluid collection assembly of claim 1, wherein the outer layer exhibits a thickness of about 1 mm or less.

8. 10. The fluid collection assembly of claim 1, wherein the thickness of the outer layer is in the range of about 25 μm to about 150 μm.

9. 10. The fluid collection assembly of claim 1, wherein the at least one outer porous material has a basis weight of about 25 g / m ２ ~Approx. 110g / m ２ A fluid collection assembly characterized in that:

10. 10. The fluid collection assembly of claim 1, wherein the inner layer comprises a hydrophobic material.

11. 10. The fluid collection assembly of claim 1, wherein the inner layer comprises at least one of a vertical wrapping nonwoven fabric and a porous foam.

12. 12. The fluid collection assembly of claim 11, wherein the inner layer includes the porous foam comprising at least one of polyurethane, polyvinyl chloride, or polyethylene.

13. 13. The fluid collection assembly of claim 11 or 12, wherein the inner layer has a porosity of about 7 pores / cm ２ ~ about 13 holes / cm ２ and a density of about 75 kg / m ３ ~Approx. 160kg / m ３ 10. A fluid collection assembly comprising the porous foam, the porous foam exhibiting at least one of the following ranges:

14. 10. The fluid collection assembly of claim 1, wherein the inner layer has a thickness in the range of about 8 mm to about 20 mm.

15. cavity, at least one opening; and fluid outlet a fluid-impermeable barrier defining at least at least one porous material disposed in the cavity, the at least one porous material having an outer layer and an inner layer, the outer layer comprising bamboo; a fluid collection assembly including: a fluid reservoir; A vacuum source; 1. A fluid collection system comprising: A fluid collection system characterized in that the cavity of the fluid collection assembly, the fluid storage container, and the vacuum source are fluidly connected to one another so that, when one or more bodily fluids are present in the cavity, suction force provided from the vacuum source to the cavity of the fluid collection assembly removes the one or more bodily fluids from the cavity and stores the bodily fluids in the fluid storage container.

16. 1. A method of using a fluid collection system, comprising: positioning the fluid collection assembly such that at least one opening defined by a fluid-impermeable barrier of the fluid collection assembly is located adjacent to or receives the urethral opening, the fluid-impermeable barrier of the fluid collection assembly defining at least a cavity and a fluid outlet, the fluid collection assembly comprising at least one porous material disposed within the cavity, the at least one porous material comprising an outer layer and an inner layer, the outer layer comprising bamboo; receiving one or more bodily fluids from the urethral meatus into the at least one porous material; A method comprising:

17. 10. The fluid collection assembly of claim 1, wherein the outer layer further comprises a hydrophilic polypropylene.

18. 10. The fluid collection assembly of claim 1, wherein the outer layer comprises at least one of hydrophilic polypropylene and hydrophilic polyethylene.

19. 10. The fluid collection assembly of claim 1, wherein the at least one porous material further comprises at least one of cellulose and a hydrophilic polyester.

20. 10. The fluid collection assembly of claim 1, wherein the inner layer comprises polyester.

21. 10. The fluid collection assembly of claim 1, wherein the at least one porous material comprises at least one porous material. A fluid collection assembly comprising at least one additional layer.

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