Patent Application
20200086164
This invention relates to a portable therapy device which, when used by a user on a lower limb, allows the user to control the speed and direction of active and passive forces across a multitude of planes while performing rehabilitative activities on the lower limb.
Following acute lower limb injuries and/or surgery, it is common for patients to suffer from mechanical limitations in and around their joints. In order to help a patient regain strength and range of motion (“ROM”) to the affected joints, patients are generally required to participate some form of therapy during the recovery process. Such therapy may involve attending clinician (e.g., physician, physical therapist) directed sessions at a clinic or medical facility. Unfortunately, often times therapy sessions are cut short prior to the completion of the recovery process. This can be due to a variety of reasons, such as limited treatment sessions approved by insurance companies, lack of transportation, inclement weather, illness, or inability to take days off from work to attend therapy sessions at the clinic.
In instances wherein therapy sessions are cut short, at-home adjunct devices may be used by a patient at home to optimize rehabilitation outcomes and to avoid scar tissue formation in order to eliminate the need for extended rehabilitation at a physical therapy (“PT”) clinic or for manipulation under anesthesia (“MUA”). Indeed, it is well established that clinicians often prescribe the use of various rehabilitation (or rehab) devices to the injured patient to allow a patient to continue work to restore their health without having to attend frequent in-clinic therapy sessions. This practice has led to the development of many different types of devices designed to help augment rehabilitation efforts and patients that wish to continue to progress without the benefit of an in-clinic professional therapist, use these types of devices.
Adjunct at-home devices available today for knee and hip therapy cover a broad spectrum of options. Nonetheless, there are two types of motions that are viable, and typically, these devices generally only cover one or the other type of motion. The first type, passive motion, is a motion created by an outside force action on the persons limb/joint. The second type, active motion, is a motion in which the patient is supplying the force to move the affected limb on their own. In instances wherein a patient is working in-clinic with a clinician, the clinician typically provides both types of motions when they provide therapy to a patient. For example, the clinician can hold a patient's limb at a desired flexed position, and then asked the patient to activate their muscles to try to move their limb while the therapist resists (active resistance). A clinician may also slowly allow the patient to move the limb as the clinician adjusts the tension, allowing movement to occur (isotonic). A clinician may also allow the patient to move the limb by pushing as hard as they can while providing sufficient resistance to allow movement to occur at a set speed (isokinetic). A clinician may also have the patient push as hard as they can for 10 seconds then release the resistance and allow the patient to move to a different angle and repeat the same 10 second routine (isometric). A clinician can also have the patient try to lightly resist the motion the clinician provides as the clinician moves the limb through a range of motion (eccentric). In any event, the clinician is trained to evaluate the dynamics of movement that each patient exhibits and perform the best or combination of the best motion therapies that can improve joint function.
Attempts have been made to provide adjunct at-home devices which meet the needs of patients. Many of the devices for home use for ankles and knees are portable cycling devices. These devices have stands with foot pedals. The patient simply mimics riding a bicycle while sitting on a chair. Some of devices are motorized so that the patient can just relax and let the device rotate and move the limb. This type would be considered passive. The same bicycle type may have a resistance capability whereby a frictional force can make the patient provide more muscle power to turn the pedals, providing active resistance. This is also a type of isotonic motion.
Another class of devices is passive type equipment. Devices used after knee arthroscopic or knee implant surgery are known as continuous passive motion (“CPM”) devices. These devices have electronic controllers that can be programmed to move the limb through a set ROM at a set speed and with a defined force level. These devices are rented by the day are generally utilized for about 14-21 days. Unfortunately, many insurance companies will not pay for a CPM device.
There are a several devices that provide a track with a sliding platform that allow the patient to flex and extend the leg using the track as a guided path and then by turning the track sideways, do hip abduction exercises. This type of device offers little or no resistance and its primary function is to keep joint mobility or maintain ROM between therapy sessions. The slider type device requires the patient to supply the energy to move the limb. This would be considered a low force active exerciser.
Other types of devices are the standard fitness-gym devices (e.g. leg extension machines) that use weights to provide resistance to the patient's limbs. These types of devices are external devices that are not used to rehabilitate the patients injured knee joint at home and they do not provide a feedback loop to the patient.
Another type of activity which may be employed during a recovery process is stretching. In many cases, clinicians may direct the utilization of mechanical stretching devices as part of a stretching program. Generally, mechanical stretching devices may be categorized as either dynamic low-load prolonged duration stretch devices (“LLPS”) or static progressive (“SP”) (i.e., splint)stretch devices. LLPS devices permit resisted active and passive motion (elastic traction) within a limited range. SP stretch devices hold the joint in a set position but allow for manual modification of the joint angle (inelastic traction).
In light of the normal therapy protocols that are implemented by a clinician, there remains a need for an adjunct at-home device that is able to facilitate the performance of rehabilitation exercises similar to those used by a clinician as they pertain to combined types of motions, active and passive, as well as those motions described as active resistive (isotonic), and active/rest /passive (contract relax therapy). There also remains a need for an adjunct at-home device that can provide for both dynamic and static progressive stretch therapy.
The present disclosure provides for a portable lower limb therapy device, comprising: a support base having an exterior surface and an interior surface, wherein the interior surface is operative to receive a foot of a user and the exterior surface includes at least one smooth exterior surface which enables the support base to slide on a smooth surface; wherein the support base includes a proximal edge and a distal edge; and a pulley system defined by a closed force transfer system integral with the support base, wherein said pulley system is integral with the support base at a location adjacent to the proximal edge and at a discrete location adjacent to the distal edge.
Embodiments of the portable lower limb therapy device may have a pulley system that includes a single cord or multiple cords, and further may have cord(s) which extend from the distal end of the support base or from the proximal end of the support base.
Referring now to the drawings and, in particular,
The slider 110 may define a rigid, slightly curved member having a smooth bottom surface that limits friction and allows it slide and glide when placed on other surfaces. The slider 110 may be constructed of hard plastic and the back panel 111, platform member 112, and heel cup 114 may be constructed out of a substantially firm yet pliable foam.
The platform member 112 may be defined by an elongated planar pad and is positioned adjacent to the distal edge 113b. The platform member 112, which may extend beyond the distal edge 113b, is movable relative to the slider 110 so as to be able to flex between an elevated position relative to the slider 110 and a planar position relative to the slider 110. It is appreciated that the platform member 112 being in the elevated position, forming a slope that rises as it moves away from the proximal edge 113a, defines the flexed configuration of the support base while the platform member 112 being in the planar position, sitting in horizontal alignment with the platform member 112, defines the relaxed configuration of the support base. It is further appreciated that the platform member 112 being in the elevated position enables the placement of a foot of a user in a therapeutic diagonal position relative to the slider 110, with the heel of the foot resting in the heel cup 114 and the foot extending up therefrom onto a substantially diagonally oriented platform member 112, as illustrated in
The back panel 111 may be defined an planar pad and may be attached to and extend up from the slider 110.
The support base may additionally include a heel cup 114 positioned over the top surface of the slider 111 and adjacent to the proximal edge 113b. The heel cup 114 may be defined as a circular padded body having a raised perimeter edge and a depressed center portion. It is appreciated that the heel cup 114 configures the support base to be able to receive a heel of a user's foot and allow the heel to rest therein with the foot pointing towards the distal edge 113b.
In an alternate embodiment, the platform member 112 and heel cup 114 may be formed as a unitary body.
The pulley system. The pulley system defines a closed force transfer system and includes two cord members 120a 120b, a support member 121, a cross member 122, and two handles 123a, 123b, with a right handle 123a adjacent to the right side of the portable lower limb therapy device 100 and a left right handle 123a adjacent to the left side thereof. A right cord member 120a connects to and extends from the back panel 111 on the right side and a left cord member 120b connects to and extends from the back panel 111 on the left side. The right cord member 120a then passes through an aperture positioned on the right side of the cross member 122, then through an aperture positioned on the right side of the support member 121, finally connecting to the right handle 123a. The left cord member 120b then passes through an aperture positioned on the left side of the cross member 122, then through an aperture positioned on the left side of the support member 121, finally connecting to the left handle 123b. In this regard, the back panel 111 connects the two cord members 120a, 120b and allows force that is simultaneously applied to each of the handles 123a, 123b to act together to raise, lower, or otherwise manipulate the support base solely through the application of force on the handles.
The handles 123a, 123b may be constructed of or otherwise include foam. The handles 123a, 123b may be defined by a substantially cylindrical handle portion with a foam surface and a web type strap, with the web type strap connecting to the cord members 120a, 120b and to the handle portion to improve durability without sacrificing comfort.
The support member 121 defines a mechanical connector integrated with the platform member 112, with a connection portion positioned on the right side of platform member 112 and a connection portion positioned on the left side of the platform member 112. Each connection portion may include an aperture therein so as to configure it to allow the cord members 120a, 120b to pass through it.
The support member 121 may define a molded or web type strap that is attached to the underneath of the platform member 112, above the slider 110, with a portion extending beyond the platform member 112 on both the right and left side so as to form the connection portions. The connection portions may include grommets integrated with the apertures therein. In an alternate embodiment, the support member 121 may be defined solely by two connection portions extending from either side of the platform member 112.
The cross member 122 is positioned sufficiently above the heel cup 114 to allow the foot of a user that is placed on the platform member 112 with the heel in the heel cup 114 to slide underneath the cross member 122. The cross member 122 may be defined by a substantially cylindrical handle portion with a foam surface.
Each cord member 120a, 120b may define an elongated, continuous line that may be constructed of a rope, strap, tubing, or cable. The cord members 120a, 120b may be of an elastic material or a rigid material.
The back panel 111 may include grommets integral with the apertures through which the cord members 120a, 120b pass prior to be secured thereto.
It is contemplated that a user having their foot positioned in the may exert mechanical force on the lower limb therapy device 100 with their upper body (as passive motion) by grabbing either the handles 123a, 123b or the cross member 122. In this regard, the lower limb therapy device 100 enables pulling, pushing and lifting actions. When using passive motion with this device, the upper body limbs provide 100% of the energy. The energy requirements to raise and lower the lower limb can be selectively distributed in real time by a user through by using both the upper and lower limbs (at various levels of force). This feature provides the opportunity to scale up from 0% to 100% of the lower limb's force requirement limb to perform hip and knee flexion and extension, hip abduction and hip circumduction (as the lower limb therapy device 100 is not on a track and can move in any direction, circumduction an available therapy motion option). Indeed, the pulley system enables a user to control the motion and the speed at which the lower limb moves as it is being flexed and extended thru various planes.
Moreover, because of the slider 110 can move on substantially any type of smooth surface, the lower limb therapy device 100 provides a means to support the weight of a user's lower limb and allow the limb to slide and glide even on uneven surfaces as a bed or therapy table.
Referring now to
The slider 210 may define a rigid, slightly curved member having a smooth bottom surface that limits friction and allows it slide and glide when placed on other surfaces. The platform member 212 may define a planar member and may be attached to the slider 210 so as to be raised above the top surface of the slider 210, leaving a hollow space between the bottom surface of the platform member 212 and top surface of the slider 210. The platform member 212 additionally includes a central aperture. It is appreciated that the central aperture in the platform member 212, and the hollow space between the bottom surface of the platform member 212 and top surface of the slider 210, configure the platform member 212 to be able to receive a heel of a user's foot and allow the heel to rest therein with the foot pointing towards the distal portion 212b.
The distal portion 212b forms the front edge of the platform member 212 and is movable relative to the platform member 212 so as to be able to flex between an elevated position relative to the platform member 212, as illustrated in
It is contemplated that the platform member 212, including the distal portion 212b, may be formed of a single, unitary structure that constructed of a flexible material so as to allow for the platform member 212 to bend. In alternative embodiments, the platform member 212 may include a flexible transverse portion that allows the platform member 212 to bend or the platform member 212 may be formed from two discrete structures connected by a hinge joint.
It is contemplated that the distal portion 212b being wider than the rest of the platform member 212 may configure the distal portion 212b to receive and support portions of a user's foot having a greater width than the heel.
The slider 210 and heel panel 211 may be constructed of hard plastic and the platform member 212 may be constructed out of a substantially firm foam that can still bend when subjected to manual force in the manner described below.
The pulley system defines a closed force transfer system, arranged with the cord member 220 extending from the rear handle 223 on the right side of the portable lower limb therapy device 200, through an aperture in the heel panel 211 positioned on the right side thereof, then through an aperture in the support member 221 positioned on the right side thereof, then through the cross member 222 entering on the right side and exiting on the left side of the portable lower limb therapy device 200, then through an aperture in the support member 221 positioned on the left side thereof, through an aperture in the heel panel 211 positioned on the left side thereof and finally connecting to the rear handle 223 on the left side.
The handles 223 are each positioned behind the heel panel 211, and may be constructed of or otherwise include foam. The handles 223 may be defined by a substantially cylindrical handle portion with a foam surface and a web type strap, with the web type strap connecting to the cord member 220 and to the handle portion to improve durability without sacrificing comfort.
The support member 221 defines a mechanical connector integrated with the platform member 212, with a connection portion positioned on the right side of the platform member 212 and a connection portion positioned on the left side of the platform member 212. Each connection portion may include an aperture therein so as to configure it to allow the cord member 220 to pass through it. In addition, the support member 221 may be positioned further from the forward edge of the platform member 212 than the distal portion 212b.
The support member 221 may define a molded or web type strap that is attached to the bottom of the platform member 212, with a portion extending beyond the platform member 212 on both the right and left side so as to form the connection portions. The connection portions may include grommets integrated with the apertures therein. In an alternate embodiment, the support member 221 may be defined solely by two connection portions extending from either side of the platform member 212.
The cross member 222 is positioned sufficiently above the platform member 212 to allow the foot of a user that is resting on the platform member 212 to slide underneath the cross member 222. The cross member 222 may be defined by a substantially cylindrical handle portion with a foam surface. The cross member 222 may be positioned directly above the support member 221 such that the cord member 220 travels vertically from the support member 221 on either side of the cross member 222 into the cross member 222 (when the platform member 212 is in the planar position).
Notably, because the cord member 220 extends from the rear handle 223 on each side of the, to and through the support member 221 on either side of the platform member 212, the pulley system is configured to transfer force applied behind the heel panel 211 to the platform member 212. Similarly, because the cord member 220 connects on either end to one of the handles 223, passes through the support member 221 on either side of the platform member 212, and passes through the cross member 222, the pulley system is configured to transfer force applied above a user's foot positioned on top of the platform member 212 to the platform member 212.
The pulley system may also include a plurality of rigid shafts 224 through which the cord member 220 passes. It is contemplated that the rigid shafts 224 may operate to hold the cord member 220 in position as it passes from one pulley system structure (i.e., heel panel 211, support member 221, cross member 222) to the next and limit how close different pulley system structures can get to one another.
The cord member 220 may define an elongated, continuous line that may be constructed of a rope, strap, tubing, or cable. The cord member may be of an elastic material or a rigid material. In an alternate embodiment, however, the cord member 220 may be a plurality of cord members attached to the rigid shafts 224.
The heel panel 211 may include grommets integral with the apertures through which the cord member 220 passes.
It is contemplated that a user having their foot positioned in the may exert mechanical force on the lower limb therapy device 200 with their upper body (as passive motion) by grabbing either the handles 223 or the cross member 222. In this regard, the lower limb therapy device 200 enables pulling, pushing and lifting actions. When using passive motion with this device, the upper body limbs provide 100% of the energy. The energy requirements to raise and lower the lower limb can be selectively distributed in real time by a user through by using both the upper and lower limbs (at various levels of force). This feature provides the opportunity to scale up from 0% to 100% of the lower limb's force requirement limb to perform hip and knee flexion and extension, hip abduction and hip circumduction (as the lower limb therapy device 200 is not on a track and can move in any direction, circumduction an available therapy motion option). Indeed, the pulley system enables a user to control the motion and the speed at which the lower limb moves as it is being flexed and extended thru various planes.
Moreover, because of the slider 210 can move on substantially any type of smooth surface, the lower limb therapy device 200 provides a means to support the weight of a user's lower limb and allow the limb to slide and glide even on uneven surfaces as a bed or therapy table.
Referring now to
The support base also includes a resilient pad member 315 that is attached to and substantially covers one side of the frame 310, forming an interior surface of the support base.
The pulley system defines a closed force transfer system and includes two cord members 320a 320b, a cross member 322, two handle pads 323a, 323b, and two adjustment members 324a, 324b. With respect to the positioning of these components, a right cord member 320a is connected to and has a portion that runs alongside the right side of the support base and a left cord member 320b is connected to and has a portion that runs alongside the left side of the support base. While it runs alongside the right side of the support base, the right cord member 320a passes through the right side of the cross member 322. Similarly, while it runs alongside the left side of the support base, the left cord member 320b passes through left side of the cross member 322. A right handle pad 323a and a right adjustment member 324a are integral with a portion of the right cord member 320a that extends away from the support base, while a left handle pad 323b and a left adjustment member 324b are integral with a portion of the left cord member 320b that extends away from the support base.
The pulley system integrates with the support base to allow force exerted on pulley system to be transferred to the support base through a pair of proximal connectors and a pair of distal connectors 326a, 326b. The distal connectors 326a, 326b may each be defined by distal apertures in the front toe portion 311 of the frame 310 that are adjacent to the distal end 314d, with the distal apertures sized to allow one of the cord members 320a 320b to pass through it. The proximal connectors may be defined by a pair of connector flaps 316a, 316b which extend from the frame 310 at a location adjacent to the proximal end 314p, with each of the connector flaps 316a, 316b, having a flap aperture sized to allow one of the cord members 320a 320b to pass through it. It is contemplated that a knots or other enlarged structure at the end of the cord members 320a 320b may be used to ensure that thes end of the right cord member 320a and the left cord member 320b does not pass through the right distal connector 326a and left distal connector 326b, respectively.
In this regard, the pulley system is integrated with the support base with the right cord member 320a extending from a right distal connector 326a that is on the right side of the front toe portion 311 and passing through a right connector flap 316a that is on the right side of the frame 310, and with the left cord member 320b extending from a left distal connector 326b that is on the left side of the front toe portion 311 and passing through a left connector flap 316b that is on the left side of the frame 310. Once the right cord member 320a and left cord member 320b pass through the respective connector flaps 316a, 316b, they may extend away from the frame 310 and integrate with the a right handle pad 323a and a right adjustment member 324a on one hand, and a left handle pad 323b and a left adjustment member 324b on the other, to form a right adjustable handling mechanism and a left adjustable handling mechanism, respectively. The handle pads 323a, 323b may be constructed of a foam or other resilient material. The adjustment members 324a, 324b may each be defined by a slip lock style structure which provides locking force while the associated cord members 320a, 320b are under tension (as they would be while being pulled by a user). The right handle pad 323a and the right adjustment member 324a may be slidably disposed on the right cord member 320a to allow the distance between the right handle pad 323a and the frame 310 (i.e., the functional length of the right cord member 320a) to be adjusted. Similarly, left handle pad 323b and the left adjustment member 324b may be slidably disposed on the left cord member 320b to allow the distance between the left handle pad 323b and the frame 310 (i.e., the functional length of the left cord member 320b) to be adjusted.
In between where the right cord member 320a passes through the right distal connector 326a and where the right cord member 320a passes through the right connector flap 316a, the right cord member 320a passes through an aperture on the right side of the cross member 322. Similarly, in between where the left cord member 320b passes through the left distal connector 326b and where the left cord member 320b passes through the left connector flap 316b, the left cord member 320b passes through an aperture on the left side of the cross member 322. In this regard, the cross member 322 extends across the support base over top of the pad member 315.
In use, it is contemplated that a user place their foot in the interior surface of the support base, with the foot resting on the pad member 315 with the user's heel towards the back heel portion 313 and toes toward the front toe portion 311. In such a position, the user's foot would be beneath the cross member 322. The exterior surface of the support base may define a rigid member which includes flat and curved portions and has a generally smooth bottom surface and back surface that limits friction and allows it slide and glide when placed on other surfaces
As with the other embodiments, the pulley system is configured to transfer force applied behind the back heel portion 313 and force applied above a user's foot positioned in the support base, to the front toe portion 311 and the bottom sole portion 312. Similarly, it is contemplated that a user having their foot positioned in the lower limb therapy device 300 may exert mechanical force on the lower limb therapy device 300 with their upper body (as passive motion) by grabbing either the handle pads 323a, 323b or the cross member 322. In this regard, the lower limb therapy device 300 enables pulling, pushing and lifting actions. When using passive motion with this device, the upper body limbs provide 100% of the energy. The energy requirements to raise and lower the lower limb can be selectively distributed in real time by a user through by using both the upper and lower limbs (at various levels of force). This feature provides the opportunity to scale up from 0% to 100% of the lower limb's force requirement limb to perform hip and knee flexion and extension, hip abduction and hip circumduction (as the lower limb therapy device 300 is not on a track and can move in any direction, circumduction an available therapy motion option). Indeed, the pulley system enables a user to control the motion and the speed at which the lower limb moves as it is being flexed and extended thru various planes.
Moreover, because of the frame 310 can move on substantially any type of smooth surface, the lower limb therapy device 300 provides a means to support the weight of a user's lower limb and allow the limb to slide and glide even on uneven surfaces as a bed or therapy table
It is appreciated that in addition to being used for rehabilitation related purposes, the portable lower limb therapy device in accordance with either embodiment can also be used by a user or patient that has limited ability to move or no ability to move their lower limbs (such as someone that is paralyzed from the waist down). For such a user, the portable lower limb therapy device can allow the user to stretch and work the muscles in a leg and/or foot by placing the targeted foot (or foot of the targeted leg) in the portable lower limb therapy device and using force applied solely from the user's arms to lift and position the leg in a manner that causes the muscles in the target foot and/or leg to stretch or otherwise be worked (particularly because the user can move the leg and any direction). Advantageously, such an act can allow the user to improve blood flow in the lower limb and otherwise better maintain the health of the lower limb.
The instant invention has been shown and described herein in what is considered to be the most practical and preferred embodiment. It is recognized, however, that departures may be made therefrom within the scope of the invention and that obvious modifications will occur to a person skilled in the art.
This application is a continuation in part of, claims the benefit of, and incorporates by reference co-pending U.S. patent application Ser. No. 16/130,953 filed Sep. 13, 2018.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 16130953 | Sep 2018 | US |
| Child | 16445960 | US |
