CLAIM OF PRIORITYThis application claims priority to U.S. provisional patent application Ser. No. 60/838,453, filed on Aug. 17, 2006.
FIELD OF THE INVENTIONThe present invention is directed to a mattress configuration that allows a patient to be turned.
BACKGROUND OF THE INVENTIONInflatable therapeutic supports for patients have been well known for many years. Such therapeutic supports include inflatable mattresses and cushions.
Most therapeutic supports are designed to reduce “interface pressures.” Interface pressures are the pressures encountered between the therapeutic support and the skin of a patient positioned on the therapeutic support. It is well known that interface pressures can significantly affect the well-being of immobile patients in that higher interface pressures can (a) reduce local blood circulation, (b) cause bed sores and (c) cause other medical complications. With inflatable mattresses, such interface pressures depend (in part) on the air pressure within the inflatable bladders.
BladdersEvery inflatable therapeutic support has at least one bladder. That bladder has a top surface capable of receiving an object, a bottom surface that is opposite the top surface, and at least one side surface positioned between the top and bottom surfaces. These various surfaces define a bladder cavity that receives a fluid. The bladder material can be a fluid impermeable material, fluid permeable material or combinations thereof depending on the desired application. For example, the bladder material can be a polymeric material, for example, vinyl, polyethylene, polyurethane or combinations thereof. The bladder can be made from a single piece of material or a plurality of materials to obtain the desired results.
In addition, the bladder cavity receives the fluid, normally air or an aqueous solution, through an inlet from a fluid source. The fluid travels from the fluid source through a conduit(s) and a control unit.
The control unit, for example, has a plurality of input keys interconnected to at least a microprocessor. The patient or patient's caregiver controls the therapeutic support through the input keys. The term input keys means a keyboard system, switches, software chips, levers, dials or any other conventional device that is used as an input device by the patient or patient's caregiver to control the operation of the therapeutic support.
In the microprocessor embodiment, the microprocessor receives the desired instructions from the input keys. From those instructions, the microprocessor processes those instructions to transmit the desired signals to operate a pump, an air compressor, a fan, valves and/or switches that push, pull and/or allows (by potential energy contained in the bladder(s)) a fluid into, through or to pass into a first conduit(s) to the respective bladder(s). Prior to entering the conduits, the fluid is contained within a reservoir and/or ambient environment; a.k.a., fluid source.
From this fundamental understanding of inflatable bladders, the variations of bladders are evident. For example, some bladders (1) have the inlet removed after the fluid is inserted into the bladder cavity so the bladder is a self-contained, static bladder and (2) retain the inlet so the bladder is a dynamic bladder that can receive and/or release fluid from the bladder cavity. The present invention is directed to controlling a dynamic bladder. Accordingly we will discuss these bladders in greater detail.
In the dynamic bladder embodiment, the fluid exits the bladder through at least one outlet. In one version, the fluid exits the outlet (a.k.a., the inlet) through the first conduit to return to the fluid source. In other versions the fluid exits the outlet (not the inlet) through a second conduit to a receiving unit, distinct from the fluid source, or the fluid source. Another version has the surface of the bladder having a plurality of apertures designed to release a portion of the fluid toward the object positioned above the inflatable bladder (a.k.a., low-loss bladder). Other outlet versions have combinations of the above-identified outlet versions.
There may be alternative embodiments to these generic descriptions of dynamic bladders and control units. The bladders may have alterations to (1) generate desired fluid flow patterns within the bladder, (2) obtain desired bladder firmness and (3) allow the bladder adaptability for the therapeutic support system. To obtain such results and others like it, the bladders could have predetermined button welds, welds, and slits along welds. Welds are locations where the bladder's top surface is connected to the bladder's bottom surface.
Standard Bladder Therapeutic SupportOne such embodiment of a therapeutic support having multiple bladders is disclosed by Hand et al. in expired U.S. Pat. No. 5,606,754. Hand et al. disclose “a . . . patient support system [having] a rigid support frame [and] a plurality of inflatable [bladders] supported upon the support frame with each [bladder] having an upper surface so that the plurality of [bladders form] a patient support surface. The inflatable [bladders] are pressurized and maintained at a predetermined pressure. This predetermined pressure may be a patient height and weight specific pressure profile.” It is known that the bladders can be positioned horizontally (a.k.a., perpendicular to a patient properly positioned on the therapeutic support) and/or vertically (a.k.a., parallel to a patient properly positioned on the therapeutic support) in relation to the support frame. This therapeutic support embodiment is known as a standard bladder therapeutic support.
Wave Therapy
When the bladders on a standard bladder therapeutic support are positioned horizontally, the bladders can be divided into two sets and each set alternates with the other set (1-2-1-2) to provide wave therapy. Wave therapy is accomplished when (a) the first set of bladders receives fluid and, at the same time, the second set of bladders releases fluid; and then (b) the second set of bladders receives fluid and, at the same time, the first set of bladders releases fluid. That process causes a wave sensation under the patient. The wave therapy can occur with additional sets of bladders, for example “1-2-3-4-1-2-3-4”, “1-3-2-1-3-2” and variations thereof.
The wave therapy, in one embodiment, is accomplished by having (a) the first set of bladders interconnect to the control unit through a primary first conduit system; and (b) the second set of bladders interconnect to the control unit through a secondary first conduit system. To obtain the desired wave therapy, the control unit positions a valve that transmits fluid to either the primary first conduit system or the secondary first conduit system in predetermined time frames to obtain the wave motion. The control unit can also alter the valve so the primary first conduit system and the secondary first conduit system receive fluid simultaneously if no wave therapy is desired.
Turn-Assist Bladder Therapeutic SupportAnother therapeutic support embodiment is a turn-assist bladder therapeutic support or, in other words, an obvious variation of a rotating bladder therapeutic support. The rotating embodiment is a known therapeutic support used to decrease sores on immobile patients. An example of a rotating (turn-assist) therapeutic support is disclosed in U.S. Pat. No. 5,794,289 which is commonly assigned and is hereby incorporated by reference.
In U.S. Pat. No. 5,794,289, Gaymar describes a rotatingtherapeutic support10 having upper and lower right side rotating bladder(s)12a,band upper and lower left side rotating bladder(s)14a,bpositioned below abladder180. The rotating bladders rotate a patient by controlling the air pressure in the right set of rotating bladders and the left set of rotating bladders. The each set of rotating bladders are inflated and deflated simultaneously. This is accomplished by having thebladders12a,binterconnected to thecontrol unit20 through afirst conduit16 and the bladders14a.binterconnected to thecontrol unit20 through asecond conduit18 as illustrated inFIGS. 1,2, and3.
To rotate a patient11 to its right side requires decreasing the air pressure in the right set of rotating bladder(s)12a,bwhile increasing the air pressure in the leftside rotating bladder14a,bso the left side is higher than the right side as illustrated inFIGS. 1,2 and3.
To rotate the patient to the patient's left side requires decreasing the air pressure in the left side rotating bladder(s)14a,band increasing the air pressure in the rightside rotating bladder12a,b, so it is opposite of what is illustrated inFIGS. 1,2 and3.
The air pressure required to rotate the patient depends on the patient's weight, body type and various other parameters. The quantity of air pressure that rotates one patient, e.g., 30 degrees, may rotate another patient, e.g., 5 degrees. For example, two female patients weigh 130 pounds, one patient is pear-shaped and the other is apple-shaped. The pear-shaped patient rotates 15 degrees with 10 mm Hg while an apple-shaped patient rotates 7 degrees with 10 mm Hg. Obviously each patient is unique and different and the control unit has to be controlled to provide the desired rotation for each patient.
As clearly set forth in Hill-Rom's U.S. patent application publication number 2006/0168736, turn-assist bladders and rotational bladders are essentially synonymous—“a turn-assist cushion or turning bladder or rotational bladder74 . . . ” If there is a difference between a turn-assist bladder and a rotation bladder, the difference is in the software used in the control unit. In the rotation bladder embodiment, the control unit (1) has the bladders in a set position—planar which can be completely deflated or just partially inflated, (2) rotates the patient, through the bladders, in a first direction by inflating one set of rotating bladders (for example the right set), (3) reverts the bladders to the set position, (4) rotates the patient, through the bladders, in a second direction by inflating the other set of rotating bladders (for example the left set) and (5) reverts to the set position. The turn-assist bladder embodiment, in contrast, eliminates the third step. Accordingly, it seems relatively obvious that the technology for the turn-assist embodiment is an obvious variation of the rotation bladder embodiment by merely altering, the software used in the control unit so the bladders are rotated from a first direction to a second direction without the intermediate step of reverting to a set position.
In the prior art, the upper section and the lower section for each set of rotational (or turn-assist) bladders are inflated at the same time to obtain the desired rotation. Moreover, the rotational (or turn-assist) bladders are positioned below other bladders or other cushion materials. SeeFIG. 11 (rotational bladders184,188 are under cushion180) in U.S. Pat. No. 5,794,289;FIGS. 17 to 19 (rotational bladders145,146,147,148 are under cushion182) in U.S. Pat. No. 6,584,628;FIG. 3 (rotational bladders80 are below cushion60) in U.S. patent application publication number 2006/0168736; andFIG. 4 (rotational bladders110 are positioned below cushions33) in U.S. Pat. No. 6,499,167. In other words, the rotating (turn-assist) bladders are positioned below another cushion which the patient is designed to be positioned upon.
Like the standard therapeutic support embodiment, the rotating therapeutic support embodiment can also provide wave therapy. In most embodiments, the wave therapy on a rotating therapeutic support embodiment occurs when (1) the rotating bladders are in the set position—generally planar—and (2) the wave therapy bladders are positioned above the rotating bladders. The wave therapy bladders are not the same as the rotating (turn-assist) bladders. Rotating (turn-assist) bladders do not perform wave therapy. One reason wave therapy is not performed by the rotating bladders is because the rotating bladders are positioned below another bladder, which may be undesirable.
A problem with the prior art therapeutic supports is that it is difficult to access the portion of the patient's body that contacts the inflated bladder(s). The present invention solves that problem.
SUMMARY OF THE INVENTIONThe present invention is directed to controlling the inflation and deflation of individual rotational (turn-assist) bladders to allow a patient caregiver to obtain easy access to the patient's body that is positioned toward the rotational (turn-assist) bladders.
BRIEF DESCRIPTION OF THE FIGURESFIG. 1 illustrates a patient positioned over rotating bladders of a therapeutic support from a head end of the rotating bladders—Prior Art.
FIG. 2 illustratesFIG. 1 from arrow2—Prior Art.
FIG. 3 illustratesFIG. 1 from arrow3—Prior Art.
FIG. 4 illustrates a top view of rotational (turn-assist) bladders (a) on a support surface and (b) interconnected to a control unit.
FIG. 5 illustrates a side view of rotational (turn-assist) bladders on a support surface.
FIG. 6 illustrates an alternative embodiment ofFIG. 5.
FIG. 7 illustrates an alternative embodiment ofFIG. 4 with additional cushions positioned over opposing left-right rotational (turn-assist) bladders.
FIG. 8 illustrates a schematic of the control unit.
FIG. 9aillustrates a side view ofFIG. 4 taken from arrow4 when the right rotational (turn-assist) bladders are being inflated simultaneously.
FIG. 9billustrates an embodiment ofFIG. 9awhen the second right rotational (turn-assist) bladder remains inflated and the first right rotational (turn-assist) bladder deflates to expose a first portion of the patient that normally contacts the right rotational (turn-assist) bladder so a patient's assistant can care and treat the patient at the first portion without excessively disturbing the patient.
FIG. 9cillustrates an embodiment ofFIG. 9awhen the first right rotational (turn-assist) bladder is inflated and the second right rotational (turn-assist) bladder deflates to expose a second portion of the patient that normally contacts the right rotational (turn-assist) bladder so a patient's assistant can care and treat the patient at the second portion without excessively disturbing the patient.
FIG. 10 illustrates an alternative embodiment to accomplishFIGS. 9aand9b.
FIG. 11 illustrates an alternative embodiment ofFIG. 4.
FIG. 12 illustrates an alternative embodiment ofFIG. 4.
FIG. 13 illustrates an alternative embodiment ofFIG. 7.
DETAILED DESCRIPTION OF THE PRESENT INVENTIONThe present invention is directed to a variation of present rotational (turn-assist) support. The rotational (turn-assist)support100 is similar to the prior art rotational (turn-assist)support surface100. One of the similarities is that the rotational (turn-assist)bladder system110 is positioned on asupport surface102. Thesupport surface102 can be a part of a mattress, a gelastic surface, a foam surface, a bladder surface, a solid surface or any other location that provides support to a patient. The variations are in the rotational (turn-assist)bladder system110 and thecontrol unit210. The rotational (turn-assist)bladder system110 can extend the entire length of thesupport surface100 as illustrated inFIG. 5 or just partially as illustrated inFIG. 6.
As illustrated inFIG. 4, the rotational (turn-assist)bladder system110 has a rightside bladder unit120 and a leftside bladder unit130. The rightside bladder unit120 is subdivided into at least afirst right section122 and asecond right section124. Likewise, the leftside bladder unit130 is subdivided into at least a firstleft section132 and a secondleft section134.
Unlike the prior art, the rotational (turn-assist)bladder system110 can be positioned immediately below apatient200, as illustrated atFIGS. 5 and 6, without any intervening cushion that interferes with the operation of thebladder system110. There is no single cushion material that overlies the entire rotational (turn-assist)bladder system110 or anentire bladder unit120,130 because that would violate the fundamental basis of the present invention. Instead there can be (a)individual cushions160a, b, c, dpositioned overbladders sections122,124,132,134 as illustrated inFIG. 13 or (b) cushions162a, bthat extend across pairs of opposing left-right bladders sections, likesections122 and132 orsections124 and134 as illustrated inFIG. 7.
There can be covers, blankets (conventional, conductive and/or convective) and/or pads (incontinence, heating, cooling, and/or positioning), not shown, positioned between the patient200 and the rotational (turn-assist)bladder system110.
As illustrated inFIG. 4, the first rightside bladder unit122 interconnects to thecontrol unit210 through a firstright conduit123 and the second rightside bladder unit124 interconnects to thecontrol unit210 through a secondright conduit125. Thecontrol unit210 distributes the desired amount of fluid to eachright bladder unit122,124. Likewise, the first leftside bladder unit132 interconnects to thecontrol unit210 through a firstleft conduit133 and the second leftside bladder unit134 interconnects to thecontrol unit210 through a secondright conduit135. Thecontrol unit210 distributes the desired amount of fluid to eachleft bladder unit132,134 through the respective conduit. This embodiment is also not described, suggested or taught in the prior art because the prior art discloses that thebladder units122,124 or132,134 are to inflate simultaneously through the same conduits, not different conduits.
The principle of how thecontrol unit210, as illustrated schematically atFIG. 8 distributes fluid to different conduits and not to other conduits, or all of them is similar to the prior art. Instead, there are justmore valves212a,b,c,dinterconnected to amicroprocessor214 that correspond to therespective conduits123,125,133,135 to obtain the desired operation of the present invention.
Recall that thecontrol unit210, for example, has a plurality ofinput keys216 interconnected to at least themicroprocessor214. Thatmicroprocessor214 interconnects to pumps, fans, valves and/or switches (collectively box216) that push, pull and/or allows (by potential energy contained in the bladder(s)) a fluid into, through or pass into the conduit(s)123,125,133,135 to the respective bladder(s)122,124,132,134. Prior to entering the conduits, the fluid is contained within a reservoir and/or ambient environment; a.k.a., fluid source. The fluid source can be within thecontrol unit210 or exterior to thecontrol unit210. Likewise theinput keys216 can be a part of thecontrol unit210, tethered to thecontrol unit210 or remotely interconnected to thecontrol unit210.
Thecontrol unit210 can be positioned within thesupport system100 or exterior to it. It depends on how the product is to be designed.
Operation of the Product:For this example, we will assume the patient will be initially turned to the left side. Obviously, the patient can be turned to the right side first, as well. It merely depends on (1) which side the patient wants to be positioned on first and/or (2) how the patient's assistant (including and not limited to a nurse, a nurse practitioner, a nurse's aide, an aide, a friend, and/or a family member), who can control the support surface, wants the patient to be positioned first.
Thefirst right section122 and thesecond right section124 are inflated at the same time (same as the prior art) as illustrated inFIG. 9aor at different rates or times, as illustrated inFIG. 10, to obtain the desired angle. Thesections122 and124 can be inflated at different times and/or rates because (1) eachsection122,124 is interconnected to thecontrol unit210 through different conduits and (2) the patient's assistant (or the manufacturer) can program the control unit through the microprocessor and/or input keys to open the valves to conduits213,215 at different times or with different apertures to control the inflation rate.
In a first embodiment, once the patient is properly rotated (turned) to the desired angle with bothsections122,124 (as illustrated inFIG. 9a) inflated for rotation (turning) purposes, the patient's assistant can begin to deflate one of the inflated and rotated (turned)sections122,124. For purposes of this example as illustrated inFIG. 9b, thesection122 is initially deflated. Why begin to deflate just one of the inflated and rotated sections? That way, the patient's assistant exposes a predetermined area (examples include and are not limited to the right side of the sacral region, the thoracic region, the lumbar region, the cervical region, the abdominal area, and/or the chest area) of the patient that normally contacts thesection122. Deflating thesection124 greatly enhances the patient's assistant ability to wash, treat, inspect the initial predetermined area of the patient, without the using props (pillows typically) or additional patient's assistants to hold the patient in position. This invention comforts the patient.
Once the patient's assistant is completed caring and treating the initial predetermined area, thesection122 is inflated to the desired level and thesection124 can be deflated to expose a second predetermined area of the patient as illustrated inFIG. 9c. Deflating thesection124 greatly enhances the patient's assistant ability to wash, treat, inspect the second predetermined area of the patient, without the using props (pillows typically) or additional patient's assistants to hold the patient in position.
Alternatively, when thesection122 is being inflated thesection124 can be simultaneously deflated to expedite the transition process.
It does not matter whichsection122,124 is deflated first or second in this first embodiment, so long as the patient's assistant has the opportunity to expose a predetermined area to care and treat the patient while the patient remains in the rotated position.
A second embodiment occurs when thesections122,124 are being inflated at different times or different rates as illustrated inFIG. 10. The section that is being inflated at the slower rate or at a later time (hereinafter “slow section”) inherently exposes a first predetermined area to the patient's assistant as shown inFIGS. 9band9c. That way the patient's assistant can wash, treat, inspect the predetermined area of the patient, without the using props (pillows typically) or additional patient's assistants to hold the patient in position. Once the slow section is fully inflated to the desired rotation (or turning) the fast section can be deflated so the patient's assistant can care and treat a different predetermined area of the patient.
Alternatively, when the slow section is being inflated the fast section can be simultaneously deflated to expedite the transition process.
A third embodiment occurs when the patient is rotated to the patient is rotated to the right side sosections132 and134 are inflated for rotation purposes. This third embodiment is the same as the first and second embodiments except the sections are on the opposite side of the support surface.
ALTERNATIVE EMBODIMENTSTheright bladder unit120 can have anadditional bladder section126 and theleft bladder unit130 can have anadditional bladder section136. Theadditional bladder section126 can be inflated/deflated by anextension128a,bfromconduit123 orconduit125 as illustrated inFIG. 11; or anew conduit127 as illustrated inFIG. 12 that is interconnected to thecontrol unit210 with itsown valve212e. Thatvalve212eis controlled by the microprocessor like anyother valve212 in thecontrol unit210.
Likewise, theadditional bladder section136 can be inflated/deflated by anextension138a,bfromconduit133 orconduit135 as illustrated inFIG. 11; or anew conduit137 as illustrated inFIG. 12 that is interconnected to thecontrol unit210 with itsown valve212f. Thatvalve212fis controlled by the microprocessor like anyother valve212 in thecontrol unit210.
If theadditional bladders126,136 are interconnected to thecontrol unit210 as illustrated inFIG. 12 that means that theadditional bladders126,136 are independently controlled in the same manner in which theother bladders122,124,132,134 are controlled and described above. Alternatively, if theadditional bladders126,136 are interconnected to thecontrol unit210 as illustrated inFIG. 11 that means theadditional bladders126,136 operate in the same way as the bladder that theadditional bladders126,136 are interconnected with through the conduit system.
Theadditional bladder section126,136 can be positioned adjacent to at least one of the other rotational (turn) bladders as illustrated inFIG. 11 or a predetermined distance from the other rotational (turn) bladders as illustrated inFIG. 12.
Horizontal/VerticallyThebladder sections122,124,126,132,134,136 can be positioned horizontally and/or vertically as defined above.
OTHER ALTERNATIVE EMBODIMENTSSelf-MonitoringProgramming an air pressure mattress unit requires a skilled technician. The skilled technician analyzes each patient and alters the programming to attain the desired rotation and air pressure. One means to avoid the expensive technician's analysis and re-programming is to create a self-monitoring mattress.
Previous self-monitoring air pressure mattresses have utilized electrical signal transmission devices and electrical signal receiving devices that sandwich the top and bottom of each bladder to monitor the bladder size. The bladder size corresponds to the desired rotation and air pressure. Such signal devices are disclosed in commonly assigned U.S. Pat. Nos. 5,794,289 and 5,926,883; which are hereby incorporated by reference. Those signal devices generate signals, like rf or light signals, that determine the proper level of inflation in the rotating (turning) bladders.
ConduitsThe conduits can be conventional tubing used in the therapeutic industry. The conduits can have additional valves like a one-way passage valve.
It is intended that the above description of the preferred embodiments of the structure of the present invention and the description of its operation are but one or two enabling best mode embodiments for implementing the invention. Other modifications and variations are likely to be conceived of by those skilled in the art upon a reading of the preferred embodiments and a consideration of the appended claims and drawings. These modifications and variations still fall within the breadth and scope of the disclosure of the present invention.