Patent Grant
9456943
The present invention relates to devices and methods for preventing and treating pressure ulcers. More particularly, the present invention relates to devices and methods for preventing and treating pressure ulcers with cushioning supports which are adapted to move into conforming contact against various regions of a patient's body when the patient lies upon or otherwise applies a force or pressure upon the support.
Individuals who are forced to sit or lie down for extended periods of time typically experience tissue necrosis over localized regions of their body known as decubitus ulcers or pressure sores. In 2009 more than a million people in acute care centers were affected with pressure ulcers. In addition to acute care centers, more than 500,000 people in long-term care centers are diagnosed with pressure ulcers every year. Pressure ulcers generally occur at locations of the body where the bony prominence is high and the underlying skin breaks down when constant pressure is placed against the skin. Blood circulation is inhibited or prevented in these localized areas and can even occur when the patient has been lying against or upon cushioning devices. Examples of areas of the body where pressure sores typically occur include the sacrum, greater trochanter, ischial tuberosity, malleolus, heel, etc. When pressure ulcers form, they can lead to extensive stays in the hospital or even to amputation.
Conventional cushioning devices generally utilize flexible materials such as foam or springs which allow for the cushion to deform and conform to the patient's body. While the cushioning device attempts to redistribute the loading from localized regions of the patient's body to a larger area over the rest of the body, such devices typically bottom out such that the patient's body contacts the underlying platform and nonetheless localizes the pressure onto the body.
Other cushioning devices have utilized fluid-filled cushions which consist of large single bladders or compartmentalized fluid or gas-filled bladders which inhibit fluid contained within the bladders from flowing laterally. In a fluid filled bladder disposed on a contoured seat, the fluid filled bladder typically bottoms out in one or more areas when supporting a patient's body weight. The places where the bladder bottoms out are sources of high localized pressure. Thus, such an assembly does not distribute pressure evenly across the portions of the anatomy in contact with the bladder. The amount of water that is used in such a bladder can be increased such that bottoming out does not occur. However, this design sacrifices stability. Additionally, since such cushions are typically designed to accommodate a wide range of patient populations, patients who are not as heavy as the maximum for which the cushion was designed for will suffer even more lack of stability than would be needed.
Another problem with simply increasing the amount of fluid to prevent bottoming out is that this requires significant volume of fluid beneath the patient and/or require specialized bedding. Additionally, many fluid filled membranes are too thick to provide adequate pressure relief because the hammocking that occurs in the regions of high protrusions. Thus, the suspension of the patient's body typically results in significantly non-uniform pressure application, with higher pressures being applied to protruding portions of the patient's body due to lack of adequate conformance of the bladder material to the patient's body.
Accordingly, there exists a need for a cushioning device which may conform to regions of the patient's body to prevent decubitis ulcers in a manner which is more cost efficient, convenient, and effective.
A conformable support assembly may be configured to conform to particular regions of a patient's body where pressure ulcers tend to form, e.g., sacrum, trochanter, ischium, head, elbow, heel, as well as any other region of the body where support is desired. Such support is particularly desired when the patient sits, lies, or stands for an extended period of time.
The conformable support assembly may generally comprise a central portion defining a central chamber at least partially filled with a fluid or gas, a first side portion attached to the central portion and defining a first chamber at least partially filled with the fluid or gas, and a second side portion attached to the central portion opposite to the first side portion and also defining a second chamber at least partially filled with the fluid or gas. Each of the chambers are in fluid communication with one another such that a pressure applied upon the central chamber reconfigures the support assembly from a flattened configuration to an angled configuration in which the fluid or gas within the central chamber is urged into the first and/or second chamber such that the side portions pivot to a predetermined height and angle relative to the central portion and form a conforming channel sized to support a region of a patient body.
Generally in use, the conforming support assembly may be used to support a region of a patient's body by positioning the region of the patient's body upon the central portion. The support may then reconfigure the side portions from a flattened configuration to an angled configuration, where the fluid or gas within the central portion is urged into the first and/or second side portion such that the side portions pivot to a predetermined height and angle relative to the central portion and form a conforming channel sized to support the region of the patient's body.
A support assembly may be worn or used by an individual who may be bed-stricken for an extended period of time to prevent the formation of pressure ulcers. Such a support assembly may be placed against and/or beneath particular regions of the body where pressure ulcers tend to form. Various features which may be incorporated or included into the support assemblies described herein may be seen in further detail in the following U.S. patent application Ser. No. 13/189,320 filed Jul. 22, 2011 (U.S. Pub. 2013/0019873); Ser. No. 13/407,628 filed Feb. 28, 2012 (U.S. Pub. 2013/0019881); Ser. No. 13/683,198 filed Nov. 21, 2012; Ser. No. 13/693,691 filed Dec. 4, 2012; Ser. No. 13/760,482 filed Feb. 6, 2013; and Ser. No. 13/784,035 filed Mar. 4, 2013. Each of these applications is incorporated herein by reference in its entirety and for any purpose herein.
The conforming support may have a central section which may be positioned directly beneath the region of the patient's body. A first adjustable side section may be adjacent to the central section and a second adjustable side section may also be adjacent to the central section and oppositely positioned from the first adjustable side section. The conforming support may be fabricated from any number of materials which have some distensibility, e.g., polyurethane, vinyl, etc., and the thickness of the material may be varied anywhere from, e.g., 1 mil to 20 mil. Each of the sections may define an inflatable chamber into which a fluid (such as water, oil, etc.) or gas (such as air, etc.) or a combination of both and/or other conformable materials (such as foam, gel, etc.) may be introduced to at least partially or fully inflate each respective chamber.
Each of the respective chambers may have an elongate barrier separating them but with an interconnecting channel so that the chambers remain in fluid communication with one another. The cross-sectional areas of the interconnecting channels between each of the chambers may be varied in length or configuration (e.g., 0.5 inches or more in length) to provide for a controlled flow rate of fluid or air between each of the chambers as well as to provide for a dampening effect if so desired. Moreover, each of the elongate barriers (as well as the interconnecting channels) may be defined along hinged regions of the conforming support. The volume of fluid or gas within each of the chambers may be adjusted independently of one another through the respective ports although before and/or during use the fluid or gas within each of the chambers may flow between each of the interconnected chambers.
The pressure of the fluid or gas within the chambers may be such that when a load greater than a predetermined set value is applied, a majority of the fluid or gas in the central portion may be pushed to the two side portions. Moreover, the minimum volume of fluid or gas within the chambers may be correlated to the weight of the patient as the stiffness of the side portions may become stiffer at higher volumes.
In use, when an applied force or pressure is applied or placed upon the central portion such as when a patient's body (e.g., hips, torso, etc.) is placed upon the central portion, the central portion may become compressed such that the fluid or gas within the central chamber is forced into one or both of the side portions. Because of the respective hinged regions and the relative size differential between the compressed central portion and the side portions, each of the side portions may pivot along the hinged regions and raise up at an angle relative to the central portion (e.g., at least 5% to 10% from the initial position), as at least some volume of the fluid or gas within the central chamber is forced into each of the respective side chambers until the internal pressure of the conforming support reaches equilibrium since each of the chambers are fluidly connected. One illustrative example may have a ratio of the volume of fluid or gas in the side portions to the central portion increasing by at least 5% as the load is applied to the central portion.
The side portions may expand, fold, or otherwise become urged into contact against both or either side of the patient's body such that the support forms a conforming channel defined by the lifted side portions and the body becomes fully supported by the conforming support not only along the bottom of the body but along the sides as well. The reaction force on the side portions may result from a relatively stiffer reactive surface or platform underlying the conforming support causing them to lift or raise relative to the central portion. This reaction force can be greater than or equal to the force applied by the body on the system. Additional structures (e.g., pieces of foam, etc.) may be optionally positioned near the sides of the conforming support to further provide for a reactive surface against which the side portions may reconfigure.
The first edge of side portion may thus rise up from the platform and the first contact surface of the side portion may come into contact against a first side of the patient body and the second edge of side portion may likewise rise up from the platform and the second contact surface of the side portion may also come into contact against a second opposite side of the patient body. Moreover, enough fluid or gas may be introduced into the conforming support such that when the patient body is placed upon the central portion and the side portions are urged to angle and reconfigure into a supporting configuration, the patient's body may remain supported particularly along the central portion and prevented from bottoming-out into contact against the platform beneath the support.
The angle and height to which the side portions raise up relative to the central portion to conform against the body may varied depending upon the desired results. For instance, the conforming support may be pre-filled prior to the patient body being placed upon the support or it may be filled after the patient body is placed upon the support. In either case, the fluid or gas may be introduced into and/or withdrawn from the support to create a low air loss feature with constant flow of the fluid or gas. Moreover, the resistive force provided by the conforming support may be function of a number of factors, e.g., weight of the patient or weight of the particular supported region (applied load), volume of fluid or gas within each of the chambers, pressure of the fluid or gas within each of the chambers, etc. To achieve a low loss of the fluid or gas within the support, an active pump may be optionally used to fill the system from one or more of its ports or the inflation ports may alternatively share a common inlet to achieve a more uniform fill. Once the patient body is fully supported and out of contact with the underlining platform, the volume of fluid or gas within the support may be further adjusted as desired.
The conforming support may further function as an assistive device for facilitating the patient (particularly elderly, pregnant women, infirm, etc.) to reposition or turn from one side of the body to the other. As the patient turns upon the conforming support, the fluid or gas may be pushed or urged from one side portion to the central portion and/or other side portion thereby elevating and inclining those portions and providing leverage to lift the patient up gently as they turn.
In alternative variations, the side portions may be fluidly coupled to allow for the fluid or gas to pass between one another depending upon the body positioning of the patient. The central portion may be fluidly isolated from the side portions such that the volume of fluid or gas within remains unchanged even when the patient lies upon the support.
While the conforming support may be fabricated from any number of suitable materials, optional vents or openings may be defined along the surface of the support to allow some of the fluid or gas to leave or vent from the support. This venting may provide some convective dissipation of heat when in direct contact with patient's body. In the event that some of the fluid or gas is vented form the support, the mass or volume of fluid or gas exiting the support ideally reaches equilibrium with the mass or volume of fluid or gas entering the system (e.g., via one or more pumps) thus creating a constant flow to ensure that the conforming support continues to provide support to the patient body. Additionally and/or alternatively, the outer surface of the support may also be made with any number of breathable materials to further allow for moisture transmission and conductive dissipation of heat from the patient's body.
In another variation, the central portion of the conforming support may be segmented into a number of sub-chambers which can also be baffled to prevent or inhibit any bulging effects over the central portion. The central portion may include, e.g., four separate sub-chambers which may be aligned in parallel with the respective side portions. However, the central portion may be configured to have fewer than four or more than four sub-chambers. Additionally, each of the sub-chambers may each be separated by respective barriers having interconnecting channels to allow for fluid communication between adjacent sub-chambers.
Generally, the conforming support may range in overall width anywhere from, e.g., greater than 5 inches such as between 20 to 45 inches, with an overall length of, e.g., greater than 5 inches such as between 8 to 25 inches. Each of the sub-chambers may each have a width of, e.g., 2 inches or greater. The overall volume of fluid or gas within the chambers may also range anywhere from, e.g., 0 to 5 liters or more. When the conforming support is in its flattened and unloaded configuration, the conforming support may have a height of, e.g., 0.25 inches or more, with a conforming angle of, e.g., 0 degrees.
The first and/or second edges of the respective side portions may raise up to a conforming height (e.g., ranging from less than 1 inch to 12 inches or up to 20 inches) relative to the platform and one or both side portions may form a conforming angle (e.g., ranging from 0 to 135 degrees, or preferably 30 to 60 degrees, or preferably 90 degrees) relative to the horizontal position of the central portion to bring the contact surfaces into conforming contact against one or both sides of the patient body. While the central portion may have a width of up to, e.g., 30 inches, the width may be varied depending upon the portion of the patient's body being supported as well as the anatomy of the patient. For instance, while an exemplary width of 30 inches may accommodate a patient's hips or torso, the central portion may be reduced for supporting other regions of the patient such as the head, elbows, heels, etc. Similarly, the side portions may also have a width ranging anywhere from, e.g., 1 to 20 inches, depending upon the desired region of the body for supporting.
In either case, the width of the central portion may be adjusted or varied to ensure that the side portions come into contact against the patient's body to provide sufficient support when the patient lies upon central portion. Moreover, the adjustment and size range for the height as well as the conforming angle and width of the central section may be applicable not only to the variation shown here but to any and all other variations shown and described herein.
Aside from the conforming support, an additional secondary support may be optionally placed upon the conforming support to provide for additional support and comfort to the patient body. This secondary support may help to ensure a uniform pressure distribution and while maximizing the surface area of contact to the surface of the body. Such a secondary support may be separate from, directly integrated, or otherwise attached to the conforming support and may move into conforming contact directly against the patient body. The secondary support may be comprised of a central portion having a first adjustable side portion and a second adjustable side portion opposite to the first portion where each portion is separated from one another via a respective barrier but also define openings to allow for fluid communication between each adjacent portion similar to the conforming support described above.
The width of the central portion may be similar to or the same as (although the dimensions may also be varied) the conforming support to ensure that positioning of the secondary support upon the conforming support will align properly. Thus, when a force or pressure is placed upon the central portion, the side portions may be allowed to raise up to a conforming height and a conforming angle to further align with the underlying conforming support.
In some variations, the secondary support may be filled with, e.g., a fluid such as water, while the underlying conforming support may be filled with, e.g., a gas such as air, to provide for a combination. In other variations, the secondary support may be filled with, e.g., a gas such as air, while the underlying conforming support may be filled with, e.g., a fluid such as water. While in other variations, both supports may be filled with either a fluid or a gas or a mixture of both. In yet another variation, an additional layer of material such as foam may be placed beneath the conforming support, between the secondary support and conforming support, above the secondary support, or all of these locations. In yet another variation of the secondary support, the secondary support may be comprised of a single chambered structure filled with the fluid or gas. The entire secondary support may be simply secured upon the underlying conforming support. Yet another of the secondary support may include one or more pods which may be filled with a fluid or gas or combination of both.
The pods may generally be separated from one another such that no fluid communication occurs between the pods or with the secondary support and each of the pods may be filled with the fluid or gas or both as described above. Although in alternative variations, some fluid communication may be provided between one or more of the pods. Additionally, the one or more pods may each occupy an envelope of, e.g., 1 cm×1 cm×0.5 cm to about 3 cm×3 cm×3 cm, in an uncompressed state and they may be formed into various shapes, e.g., spherical, cylindrical, cubical, etc. Moreover, each of the pods may be formed from various materials such as polyurethane, silicone, vinyl, nylon, polyethylene vinyl acetate (PEVA), etc. having a thickness ranging from, e.g., 0.1 mm to 5 mm.
While the various supports described having incorporated conforming support structures have fluidly coupled chambers to provide for fluid transfer between the different chambers, another variation of a conforming support may have each portion define a chamber which is fluidly isolated from one another. Each of the chambers may be at least partially inflated and/or deflated prior to or during use through their respective ports with any of the fluids and/or gases, as previously described, to ensure that the patient is adequately supported and does not contact the underlying platform or surface.
When a load is applied upon the central portion such as when the patient lies upon or places a portion of their body upon the support, the side portions may be individually adjusted by further inflating and/or deflating their respective chambers to ensure that the side portions are able to angle and lift against the underlying platform or surface relative to the central portion. Moreover, because the internal pressure of each of the portions need not be uniform, they may be individually adjusted to accommodate different patient body types or to induce tilting of the patient to their side. The fluidly disconnected conforming system may be similarly combined with any of the secondary supports as well.
Regardless of which variation is utilized, any of the conforming supports and/or support assemblies may be incorporated with other active or non-active support surfaces, e.g., beds, mattresses, wheelchairs, seats, etc., and perform with the same functionality. With any of the variations described herein, different features and aspects from each of the variations may be combined with one another in various combinations.
Generally, in a healthy individual, the presence of muscle mass and soft tissue usually functions to distribute and relieve pressure from bony protuberances of the body contacted against the underlying surface. However, when a patient is forced to lie on one portion of their body for extended periods of time, areas such as the sacrum or trochanter (or other portions of the body such as the heel, elbow, head, etc.) may compress a region of the skin and tissue between the protuberance and a contact region formed against the underlying surface.
Typical pressures generated in the hip area for healthy individuals lying against a surface may range around 4 kPa. However, for older and/or diseased individuals, the contact pressures between regions of bony prominence and the skin is generally higher due to various factors such as muscle atrophy. For instance, increased pressures were found to range around 7.3 kPa for such older individuals. Blood circulation becomes restricted and tissue necrosis typically begins when pressures range above 4.3 kPa leading to the development of pressure ulcers.
A support assembly may be worn or used by an individual who may be bed-stricken for an extended period of time to prevent the formation of pressure ulcers. Such a support assembly may be placed against and/or beneath particular regions of the body where pressure ulcers tend to form, e.g., sacrum, trochanter, ischium, head, elbow, heel, as well as any other region of the body where support is desired. The support assembly may be formed into a configuration to be conformed against the patient's body, e.g., around the hips or lower back, or a portion of the body, e.g., around the ankles or feet. Various features which may be incorporated or included into the support assemblies described herein may be seen in further detail in the following U.S. patent application Ser. No. 13/189,320 filed Jul. 22, 2011 (U.S. Pub. 2013/0019873); Ser. No. 13/407,628 filed Feb. 28, 2012 (U.S. Pub. 2013/0019881); Ser. No. 13/683,198 filed Nov. 21, 2012; Ser. No. 13/693,691 filed Dec. 4, 2012; Ser. No. 13/760,482 filed Feb. 6, 2013; and Ser. No. 13/784,035 filed Mar. 4, 2013. Each of these applications is incorporated herein by reference in its entirety and for any purpose herein.
Generally, the conforming support assembly may comprise a conforming support 10 which is configured and sized for placement beneath and/or against a region of the patient's body, as described. The conforming support 10 may have a central section 12 which may be positioned directly beneath the region of the patient's body. A first adjustable side section 14 may be adjacent to the central section 12 and a second adjustable side section 16 may also be adjacent to the central section 12 and oppositely positioned from the first adjustable side section 14, as shown in the perspective view of
Each of the sections may define an inflatable chamber into which a fluid (such as water, oil, etc.) or gas (such as air, etc.) or a combination of both and/or other conformable materials (such as foam, gel, etc.) may be introduced to at least partially or fully inflate each respective chamber. For instance, the central section 12 may define a central chamber 18, first side section 14 may define a first side chamber 20, and second side section 16 may define second side chamber 22.
While each chamber may be separately inflated and/or deflated by respective ports 32A, 32B fluidly coupled to central chamber 12, ports 34A, 34B fluidly coupled to first side chamber 20, and ports 36A, 36B fluidly coupled to second side chamber 22, each of the respective chambers may have an elongate barrier separating them but with an interconnecting channel so that the chambers remain in fluid communication with one another. Central chamber 18 may be seen separated from first side chamber 20 by barrier 24 but may remain fluidly coupled via interconnecting channel 26 defined along barrier 24. Likewise, central chamber 18 may also be seen separated from second side chamber 22 by barrier 28 but may remain fluidly coupled via interconnecting channel 30 defined along barrier 28. The cross-sectional areas of the interconnecting channels 26, 30 between each of the chambers may be varied in length or configuration (e.g., 0.5 inches or more in length) to provide for a controlled flow rate of fluid or air between each of the chambers as well as to provide for a dampening effect if so desired. While more than one interconnecting channel 26, 30 may be present along the barriers, the channels may each be of uniform size or they may be sized alternately or arbitrarily or any number of different combinations, if so desired. Moreover, each of the elongate barriers 24, 28 (as well as interconnecting channels 26, 30) may be defined along hinged regions 38, 40 of the conforming support 10.
As shown in
In use, when an applied force or pressure F is applied or placed upon the central portion 12 such as when a patient's body (e.g., hips, torso, etc.) is placed upon the central portion 12, the central portion 12 may become compressed such that the fluid or gas within the central chamber is forced into one or both of the side portions 14, 16. Because of the respective hinged regions 38, 40 and the relative size differential between the compressed central portion 12 and the side portions 14, 16, each of the side portions 14, 16 may pivot along the hinged regions 38, 40 and raise up at an angle relative to the central portion 12 (e.g., at least 5% to 10% from the initial position), as shown in the perspective view of
The side portions 14, 16 may expand, fold, or otherwise become urged into contact against both or either side of the patient's body such that the support 10 forms a conforming channel 42 defined by the lifted side portions 14, 16 and the body becomes fully supported by the conforming support 10 not only along the bottom of the body but along the sides as well. The reaction force on the side portions 14, 16 may result from a relatively stiffer reactive surface or platform underlying the conforming support 10 causing them to lift or raise relative to the central portion 12. This reaction force can be greater than or equal to the force applied by the body on the system. Additional structures (e.g., pieces of foam, etc.) may be optionally positioned near the sides of the conforming support 10 to further provide for a reactive surface against which the side portions 14, 16 may reconfigure.
The first edge 48 of side portion 14 may thus rise up from the platform and the first contact surface 44 of side portion 14 may come into contact against a first side of the patient body and the second edge 50 of side portion 16 may likewise rise up from the platform and the second contact surface 46 of side portion 16 may also come into contact against a 10 second opposite side of the patient body. Moreover, enough fluid or gas may be introduced into the conforming support 10 such that when the patient body is placed upon the central portion 12 and the side portions 14, 16 are urged to angle and reconfigure into a supporting configuration, the patient's body may remain supported particularly along the central portion 12 and prevented from bottoming-out into contact against the platform beneath the support 10.
The angle and height to which the side portions 14, 16 raise up relative to the central portion 12 to conform against the body may varied depending upon the desired results. For instance, the conforming support 10 may be pre-filled prior to the patient body being placed upon the support 10 or it may be filled after the patient body is placed upon the support 10. In either case, the fluid or gas may be introduced into and/or withdrawn from the support 10 to create a low air loss feature with constant flow of the fluid or gas. Moreover, the resistive force provided by the conforming support 10 may be function of a number of factors, e.g., weight of the patient or weight of the particular supported region (applied load), volume of fluid or gas within each of the chambers, pressure of the fluid or gas within each of the chambers, etc. To achieve a low loss of the fluid or gas within the support 10, an active pump may be optionally used to fill the system from one or more of its ports or the inflation ports may alternatively share a common inlet to achieve a more uniform fill. Once the patient body is fully supported and out of contact with the underlining platform, the volume of fluid or gas within the support 10 may be further adjusted as desired.
Because placing a force F or pressure upon the central portion 12 urges the side portions 14, 16 to raise or angle automatically due to the fluid or gas being forced into the respective portions 14, 16, the conforming support 10 may further function as an assistive device for facilitating the patient (particularly elderly, pregnant women, infirm, etc.) to reposition or turn from one side of the body to the other. As the patient turns upon the conforming support 10, the fluid or gas may be pushed or urged from one side portion to the central portion 12 and/or other side portion thereby elevating and inclining those portions and providing leverage to lift the patient up gently as they turn. Thus, a portion of the patient's body may be elevated opposite to a direction of the patient turning via the central and/or side portions 14, 16 such that the patient body is lifted and assisted in repositioning or turning.
In alternative variations, the side portions 14, 16 may be fluidly coupled to allow for the fluid or gas to pass between one another depending upon the body positioning of the patient. The central portion 12 may be fluidly isolated from the side portions 14, 16 such that the volume of fluid or gas within remains unchanged even when the patient lies upon the support.
While the conforming support may be fabricated from any number of suitable materials, optional vents or openings may be defined along the surface of the support 10 to allow some of the fluid or gas to leave or vent from the support 10. This venting may provide some convective dissipation of heat when in direct contact with patient's body. In the event that some of the fluid or gas is vented form the support 10, the mass or volume of fluid or gas exiting the support 10 ideally reaches equilibrium with the mass or volume of fluid or gas entering the system (e.g., via one or more pumps) thus creating a constant flow to ensure that the conforming support 10 continues to provide support to the patient body. Additionally and/or alternatively, the outer surface of the support 10 may also be made with any number of breathable materials to further allow for moisture transmission and conductive dissipation of heat from the patient's body.
In another variation,
Generally, the conforming support may range in overall width anywhere from, e.g., greater than 5 inches such as between 20 to 45 inches, with an overall length of, e.g., greater than 5 inches such as between 8 to 25 inches. Each of the sub-chambers 60A, 60B, 60C, 60D may each have a width of, e.g., 2 inches or greater. The overall volume of fluid or gas within the chambers may also range anywhere from, e.g., 0 to 5 liters or more. When the conforming support is in its flattened and unloaded configuration, the conforming support may have a height of, e.g., 0.25 inches or more, with a conforming angle of, e.g., 0 degrees.
The first and/or second edges 48, 50 of the respective side portions 14, 16 may raise up to a conforming height H (e.g., ranging from less than 1 inch to 12 inches or up to 20 inches) relative to the platform and one or both side portions 14, 16 may form a conforming angle α (e.g., ranging from 0 to 135 degrees, or preferably 30 to 60 degrees, or preferably 90 degrees) relative to the horizontal position of the central portion 60 to bring the contact surfaces 44, 46 into conforming contact against one or both sides of the patient body. While the central portion 60 may have a width of up to, e.g., 30 inches, the width may be varied depending upon the portion of the patient's body being supported as well as the anatomy of the patient. For instance, while an exemplary width of 30 inches may accommodate a patient's hips or torso, the central portion 60 may be reduced for supporting other regions of the patient such as the head, elbows, heels, etc. Similarly, the side portions 14, 16 may also have a width ranging anywhere from, e.g., 1 to 20 inches, depending upon the desired region of the body for supporting.
In either case, the width of the central portion 60 may be adjusted or varied to ensure that the side portions 14, 16 come into contact against the patient's body to provide sufficient support when the patient lies upon central portion 60. Moreover, the adjustment and size range for the height H as well as the conforming angle α and width of the central section 60 may be applicable not only to the variation shown here but to any and all other variations shown and described herein.
Aside from the conforming support, an additional secondary support may be optionally placed upon the conforming support to provide for additional support and comfort to the patient body. This secondary support may help to ensure a uniform pressure distribution and while maximizing the surface area of contact to the surface of the body. Such a secondary support may be separate from, directly integrated, or otherwise attached to the conforming support and may move into conforming contact directly against the patient body. The secondary support 70 may be comprised of a central portion 72 having a first adjustable side portion 74 and a second adjustable side portion 76 opposite to the first portion 74 where each portion is separated from one another via a respective barrier but also define openings to allow for fluid communication between each adjacent portion, as shown in the end and perspective views of
The width of the central portion 72 may be similar to or the same as (although the dimensions may also be varied) the conforming support to ensure that positioning of the secondary support 70 upon the conforming support will align properly. Thus, when a force or pressure is placed upon the central portion 72, the side portions 74, 76 may be allowed to raise up to a conforming height h and a conforming angle α to further align with the underlying conforming support, as shown in the end and perspective views of
In some variations, the secondary support may be filled with, e.g., a fluid such as water, while the underlying conforming support may be filled with, e.g., a gas such as air, to provide for a combination. In other variations, the secondary support may be filled with, e.g., a gas such as air, while the underlying conforming support may be filled with, e.g., a fluid such as water. While in other variations, both supports may be filled with either a fluid or a gas or a mixture of both. In yet another variation, an additional layer of material such as foam may be placed beneath the conforming support, between the secondary support and conforming support, above the secondary support, or all of these locations.
Another variation of the secondary support is illustrated in the end and perspective views of
In yet another variation of the secondary support,
Yet another variation is shown in the perspective view of
The pods 106, 108 may generally be separated from one another such that no fluid communication occurs between the pods or with the secondary support 104 and each of the pods may be filled with the fluid or gas or both as described above. Although in alternative variations, some fluid communication may be provided between one or more of the pods. Additionally, the one or more pods may each occupy an envelope of, e.g., 1 cm×1 cm×0.5 cm to about 3 cm×3 cm×3 cm, in an uncompressed state and they may be formed into various shapes, e.g., spherical, cylindrical, cubical, etc. Moreover, each of the pods may be formed from various materials such as polyurethane, silicone, vinyl, nylon, polyethylene vinyl acetate (PEVA), etc. having a thickness ranging from, e.g., 0.1 mm to 5 mm. Although the figure illustrates four pods on either side of the secondary support 104, any number of pods may be utilized, e.g., 1 to 30 or more, arranged either uniformly or arbitrarily. Additional details are shown and described in further detail in the U.S. patent applications incorporated hereinabove.
The various combinations of conforming supports and secondary supports may include any number of other combinations between the different types of support as well as the different fluids and/or gases which may be used for inflating the supports but which may not be shown. Such various combinations are intended to be within the scope of this description.
While the various supports described having incorporated conforming support structures have fluidly coupled chambers to provide for fluid transfer between the different chambers,
When a load is applied upon the central portion 12 such as when the patient lies upon or places a portion of their body upon the support, the side portions 14, 16 may be individually adjusted by further inflating and/or deflating their respective chambers to ensure that the side portions 14, 16 are able to angle and lift against the underlying platform or surface relative to the central portion 12. Moreover, because the internal pressure of each of the portions need not be uniform, they may be individually adjusted to accommodate different patient body types or to induce tilting of the patient to their side.
Alternative variations may incorporate a pump to actively inflate and/or deflate one or more the portions individually or simultaneously to induce motion and relieve contact pressure. Moreover, other variations may have different configurations of partially or fully filled and unfilled portions, e.g., filled central portion with unfilled side portions or unfilled central portion with filled side portions, etc.
The fluidly disconnected conforming system may be similarly combined with any of the secondary supports as well.
An example is illustrated in the perspective views of
Regardless of which variation is utilized, any of the conforming supports and/or support assemblies may be incorporated with other active or non-active support surfaces, e.g., beds, mattresses, wheelchairs, seats, etc., and perform with the same functionality. One variation is shown in the perspective views of
In yet another variation,
In other variations of the conforming support assembly, the support may be configured and sized to support any other region of the patient's body. One variation is shown in the perspective and end views of
To compare the supportive effects of the conforming support, profiles of the resulting pressure distribution of an exemplary patient head PH was mapped using various supports, as shown in the pressure maps of
Another variation is shown in the perspective views of
To compare the supportive effects of the conforming support, profiles of the resulting pressure distribution of an exemplary patient elbow PE was mapped using various supports, as shown in the pressure maps of
In yet another variation of the conforming support,
This conforming support 290 may be used to support a number of different regions of the patient's body and this may be used particularly, e.g., as a seat cushion, that the patient may sit upon. As the patient sits upon conforming support 290, the fluid or gas within may be moved from the sub-chambers 294 of the central portion and into the surrounding portion 292 such that central portion reconfigures the conforming support 290 from a flattened configuration in which the fluid or gas within the central portion is urged into the surrounding chamber such that the surrounding portion pivots to and forms a conforming channel sized to support a region of a patient body. Additionally, any number of additional secondary supports may also be placed atop or secured upon the conforming support 290 as well to provide for further support of the patient's body.
Yet another variation is shown in the perspective view of
The applications of the devices and methods discussed above are not limited to particular regions of the body such as the sacrum, trochanter, ischium, head, elbow, heel, etc. but may include any number of further applications. Modification of the above-described device and methods for carrying out the invention, and variations of aspects of the invention that are obvious to those of skill in the art are intended to be within the scope of the claims.
| Number | Name | Date | Kind |
|---|---|---|---|
| 2589155 | Smith | Mar 1952 | A |
| 3721232 | Trenchard | Mar 1973 | A |
| 4528705 | Greenawalt | Jul 1985 | A |
| 4726624 | Jay | Feb 1988 | A |
| 4730610 | Graebe | Mar 1988 | A |
| 5328445 | Spahn | Jul 1994 | A |
| 5544378 | Chow | Aug 1996 | A |
| 5971006 | Seigerschmidt | Oct 1999 | A |
| 8052630 | Kloecker et al. | Nov 2011 | B2 |
| 20030120191 | Clement | Jun 2003 | A1 |
| 20120253250 | Spahn et al. | Oct 2012 | A1 |
| Number | Date | Country |
|---|---|---|
| 2197321 | Aug 2012 | EP |
| Number | Date | Country | |
|---|---|---|---|
| 20150052685 A1 | Feb 2015 | US |
