WO2017145181A1 - Système de prothèse de jambe - Google Patents

Système de prothèse de jambe Download PDF

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Publication number
WO2017145181A1
WO2017145181A1 PCT/IN2017/050071 IN2017050071W WO2017145181A1 WO 2017145181 A1 WO2017145181 A1 WO 2017145181A1 IN 2017050071 W IN2017050071 W IN 2017050071W WO 2017145181 A1 WO2017145181 A1 WO 2017145181A1
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WO
WIPO (PCT)
Prior art keywords
cane
load bearing
primary load
leg
units
Prior art date
Application number
PCT/IN2017/050071
Other languages
English (en)
Inventor
Arun JOSHUA CHERIAN
Original Assignee
Joshua Cherian Arun
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Joshua Cherian Arun filed Critical Joshua Cherian Arun
Publication of WO2017145181A1 publication Critical patent/WO2017145181A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/60—Artificial legs or feet or parts thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/60—Artificial legs or feet or parts thereof
    • A61F2/66—Feet; Ankle joints
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/60—Artificial legs or feet or parts thereof
    • A61F2/66—Feet; Ankle joints
    • A61F2002/6614—Feet
    • A61F2002/6657—Feet having a plate-like or strip-like spring element, e.g. an energy-storing cantilever spring keel

Definitions

  • the embodiments herein are generally related to a system for developing prosthetic legs.
  • the embodiments herein are particularly related to a prosthetic leg structure with compliance design by using cane assembly at distal end.
  • the embodiments herein are more particularly related to a prosthetic leg structure with compliance design by using cane assembly at distal end for facilitating faster walking and decreased energy expenditure.
  • Existing prosthetic limbs are produced with materials such as rubber, plastics, metal and composites such as carbon fiber and/or glass fiber, which make the limb lighter, stronger and elastic. Addition of electronic components makes the prosthetics more controllable and capable of automatically adapting functionalities during certain tasks.
  • the components of a prosthetic limb include a pylon, a socket, and a suspension system.
  • the pylon is the internal frame or skeleton of the prosthetic limb providing structural support.
  • materials such as metal and carbon fiber composites are used to form the pylons.
  • the socket is the portion of the prosthetic device that interfaces with the patient's limb stump or residual limb.
  • the suspension system keeps the prosthetic limb attached to the body.
  • the primary object of the embodiments herein is to provide a prosthetic legs structure using cane assembly at distil end of the legs.
  • Another object of the embodiments herein is to provide prosthetic legs to lower extremity amputees, which is lightweight and cost-effective with cane material.
  • Yet another object of the embodiments herein is to provide a system and method for fabricating prosthetic legs with compliancy design of cane, thereby facilitating faster walking and decreased energy expenditure at similar speeds compared to a conventional human foot.
  • Yet another object of the embodiments herein is to provide a system and method for fabricating prosthetic legs to provide flexing for people with Jaipur foot.
  • Yet another object of the embodiments herein is to provide a transfemoral prosthetic leg comprising a suspension, a socket, a knee joint, and a distal cane assembly.
  • Yet another object of the embodiments herein is to provide a transtibial prosthetic leg comprising a knee brace, a socket, and a distal cane assembly.
  • Yet another object of the embodiments herein is to provide a system and method for fabricating prosthetic legs that comprise cane structure at distal end, including a U-shaped heel cane and a compliance leg cane, to provide flexibility and stability while walking.
  • Yet another object of the embodiments herein is to provide a prosthetic legs with flex-foot design, by using any one of cane, cross-linked cane and bamboo at the distal end.
  • a prosthetic leg structure comprises a cane assembly comprising a plurality of primary load bearing units, a central heel unit sandwiched between a two adjacent primary load bearing units, a foldable shape adapter unit detachably connected to the cane assembly and an outer shell cover configured to cover the primary load bearing structures and act as the outer shell for the prosthetic leg.
  • the plurality of primary load bearing units is configured or designed to originate from a forefoot to proceed horizontally past a mid-foot and turns up vertically to end below or above a knee.
  • the plurality of primary load bearing units are arranged in a side by side manner or adjacently and the plurality of primary load bearing units is designed in an asymmetric shape.
  • the plurality of primary load bearing units is made up of a cane material.
  • the central heel unit is designed or configured to originate from the forefoot to continue horizontally past the mid foot and curved after a vertical bend of the primary load bearing unit.
  • the central heel unit is curved away or outwardly or in a lateral side of a body mid line, and the central heel unit is designed to loop or circle around to end near a medial primary load bearing unit.
  • the foldable shape adapter unit comprises a flat sheet built or bent in a particular geometry to allow the adapter to bend, wrap and transfer vertical and lateral forces and moments from the plurality of the primary load bearing units.
  • the flat sheet is made of metal or plastic, and the flat sheet comprises a vertical unit attached or welded at a centre of the flat sheet so as to interface with existing socket adaptors.
  • the flat sheet has cut geometry, and is such that the flat sheet is wrapped around one primary load bearing unit to connect to remaining features of the adapter to provide a positive lock or seal around the primary load bearing units.
  • the outer shell comprises a plurality of units, and is attached to the primary load bearing units through a bolt and screw arrangement or adhesive or glue.
  • the plurality of primary load bearing structures are adjusted to a preset stiffness.
  • the primary load bearing structure at the lateral side and away from a mid-line of a human body is tuned or adjusted to stiffness and strength or rigidity which is more than that of the primary load bearing structure at the medial side and closer to the mid-line of the human body.
  • the plurality of primary load bearing structures comprise a central heel unit, and the central heel unit starts from the forefoot and continues horizontally past the mid foot.
  • the central heel unit is vertically stacked with at least two or more central heel units to increase a stiffness of the heel during heel strike in an initial phase of a walk step.
  • the stiffness and strength of the prosthetic leg is tuned or adjusted based on a plurality of parameters.
  • the plurality of parameters include cane species, geometrical design of foot, diameter of cane, number of cane units, weight of a user person and an amount of leg activity expected from the user.
  • the foldable shape adapter is configured to adjust a height of the primary load bearing structures through a plurality of thin shims of the material of the foldable shape adapter.
  • the plurality of thin shims are wedged between the plurality of primary load bearing structures and the foldable shape adaptor.
  • the outer shell comprises a plurality of units that are designed to cover a plurality of parts of the prosthetic leg to provide a geometrical equivalent of a natural human leg.
  • the plurality of units of the outer shell are interconnected to one another to provide a stable overall structure.
  • the geometrical shape of the overall prosthetic leg is determined and the plurality of units of the outer shell is appropriately cut to provide a seamless overall structure and prevent an overlap of surfaces.
  • the outer shell is closed completely and sealed with a co-polymer, and wherein the copolymer that is resistant to water, air and dust.
  • the plurality of primary load bearing structures are coated with a thin multi-layer film to prevent abrasion of cane and provide a resistant against humidity and fire.
  • the thin multi-layer film comprises a natural latex film and co-polymer film.
  • the cane assembly is treated chemically to increase mechanical and thermal properties of cane.
  • a prosthetic leg structure includes a cane assembly at distal end.
  • a U-shaped heel contact is arranged in the cane assembly to provide springiness to the leg. When the heel is in contact with the ground, a flex is generated.
  • a C-shaped curve is provided in the cane assembly to provide flex and a bouncing movement.
  • the prosthetic leg is designed to store strained energy elastically and is more efficient than conventional prosthetic legs.
  • the prosthetic leg is designed to provide a lightweight structure for amputees.
  • the transfemoral prosthetic leg includes a knee suspension, a socket, a prosthetic knee joint, a leg cane and a heel cane. Further, the prosthetic leg is enclosed in a cosmetic cover.
  • the composition of socket includes materials such as plastic, composites, and the like.
  • the cosmetic cover is designed to provide a shape to the prosthetic leg.
  • the foot is designed with a foot cover comprising foam and polypropylene.
  • the leg cane is hinged to the socket, which is designed as per best medical practices.
  • the knee joint is designed and assembled as per best medical practice.
  • the prosthetic leg further includes friction grip attachments such as hose clamps. These attachments are provided to enable a person to adjust a height level of the leg.
  • pylon is provided with a large stress reducing adapter to attach the leg cane to the socket.
  • the pylon is a stainless tube.
  • a transtibial prosthetic legis comprises a knee brace suspension, a polypropylene socket, a polypropylene cosmetic cover, a leg cane and a heel cane.
  • the prosthetic leg is enclosed in a cosmetic cover having a thickness of two millimeters.
  • the cosmetic cover is made of polypropylene.
  • the foot is designed/covered with a foot cover made up of foam and polypropylene.
  • the prosthetic leg further includes friction grip attachments such as hose clamps. These friction grip attachments are provided to enable a person to adjust a height level of the leg.
  • a pylon is provided with large stress reducing adapter to attach the leg cane to the socket.
  • the pylon is a stainless tube.
  • a prosthetic leg comprises a cane socket that is connected to the residual limb.
  • the cane socket is woven into a mesh-like structure to provide breathability.
  • the cane socket is designed to conform to the shape of the human body in day-to-day activities.
  • a cane assembly provided in the prosthetic legs comprises one or more cane sticks for providing a compliance.
  • the flex-foot design of cane leg facilitates faster walking and decreases energy expenditure at similar speeds, compared to a conventional foot. Further, walking with the flex foot provides an improved range of ankle motion.
  • the cane leg functions as a flexible pylon that is deformed during a weight application or receiving a load or weight. The flexible pylon is further reformed to give a "pushing-off ' action/effect during un-weighing, and provides a dynamic elastic response for foot design.
  • a method is provided to determine/estimate the number of sticks required/used in cane pylon depending on a weight of a person.
  • the diameter and shape of the cane sticks are also determined/estimated based on at least one of the person's weight, type of usage and quality of cane material used.
  • a prosthetic leg structure for a person with Jaipur foot is provided.
  • Jaipur foot the person's foot does not flex.
  • the cane foot is implemented or provided to person with Jaipur foot to facilitate a flex motion, when the heel strikes the ground.
  • the cane foot is designed to reduce the effort and not just limited to, the lower extremity muscles of a person while walking.
  • FIG. 1 illustrates a side view of a transfemoral prosthetic leg, according to an embodiment herein.
  • FIG. 2 illustrates a side view of a transtibial prosthetic leg, according to an embodiment herein.
  • FIG. 3 illustrates a side view of a cane assembly at distal end, in a prosthetic leg, according to an embodiment herein.
  • FIG. 4 illustrates a side view of a prosthetic leg designed for sports, according to an embodiment herein.
  • FIG. 5 illustrates a side view of prosthetic leg structure with a cane assembly at distal end, according to an embodiment herein.
  • FIG. 6 illustrates a side-view of a primary load bearing structure assembly in a prosthetic leg, according to an embodiment herein.
  • FIG. 7 illustrates a front-view of a primary load bearing structure assembly in a prosthetic leg, according to an embodiment herein.
  • FIG. 8 illustrates a side-view of a primary load bearing structure assembly in a prosthetic leg, according to an embodiment herein.
  • FIG. 9 illustrates a side view of a primary load bearing structure assembly in a prosthetic leg, according to an embodiment herein.
  • FIG. 10 illustrates a back side view of a primary load bearing structure assembly, in a prosthetic leg, according to an embodiment herein.
  • FIG. 11 illustrates a bottom-view of a primary load bearing structure assembly in a prosthetic leg, according to an embodiment herein.
  • FIG. 12 illustrates a top-view of an unfolded variable shape adapter in a prosthetic leg, according to an embodiment herein.
  • FIG. 13 illustrates a side view of a folded variable shape adapter in a prosthetic leg, according to an embodiment herein.
  • FIG. 14 illustrates a front-view of a folded variable shape adapter connected with a primary load bearing structure in a prosthetic leg, according to an embodiment herein.
  • FIG. 15 illustrates an isometric-view of a multi-part variable cosmetic shell assembly, in accordance with one embodiment herein.
  • the various embodiments herein disclose a usage of cane as material for pylon of prosthetic legs.
  • Cane provides properties of elastically storing strain energy and essentially acts as a spring.
  • Cane provides properties of flexing by storing energy and essentially acts as a spring.
  • the embodiments provide lightweight and cost-effective prosthetic legs to people with lower extremity amputees.
  • a prosthetic leg structure comprises a cane assembly comprising a plurality of primary load bearing units, a central heel unit sandwiched between a two adjacent primary load bearing units, a foldable shape adapter unit detachably connected to the cane assembly and an outer shell cover configured to cover the primary load bearing structures and act as the outer shell for the prosthetic leg.
  • the plurality of primary load bearing units is configured or designed to originate from a forefoot to proceed horizontally past a mid-foot and turns up vertically to end below or above a knee.
  • the plurality of primary load bearing units are arranged in a side by side manner or adjacently and the plurality of primary load bearing units is designed in an asymmetric shape.
  • the plurality of primary load bearing units is made up of a cane material.
  • the central heel unit is designed or configured to originate from the forefoot to continue horizontally past the mid foot and curved after a vertical bend of the primary load bearing unit.
  • the central heel unit is curved away or outwardly or in a lateral side of a body mid line, and the central heel unit is designed to loop or circle around to end near a medial primary load bearing unit.
  • the foldable shape adapter unit comprises a flat sheet built or bent in a particular geometry to allow the adapter to bend, wrap and transfer vertical and lateral forces and moments from the plurality of the primary load bearing units.
  • the flat sheet is made of metal or plastic, and the flat sheet comprises a vertical unit attached or welded at a centre of the flat sheet so as to interface with existing socket adaptors.
  • the flat sheet has cut geometry, and is such that the flat sheet is wrapped around one primary load bearing unit to connect to remaining features of the adapter to provide a positive lock or seal around the primary load bearing units.
  • the outer shell comprises a plurality of units, and is attached to the primary load bearing units through a bolt and screw arrangement or adhesive or glue.
  • the plurality of primary load bearing structures are adjusted to a preset stiffness.
  • the primary load bearing structure at the lateral side and away from a mid-line of a human body is tuned or adjusted to stiffness and strength or rigidity which is more than that of the primary load bearing structure at the medial side and closer to the mid-line of the human body.
  • the plurality of primary load bearing structures comprise a central heel unit, and the central heel unit starts from the forefoot and continues horizontally past the mid foot.
  • the central heel unit is vertically stacked with at least two or more central heel units to increase a stiffness of the heel during heel strike in an initial phase of a walk step.
  • the stiffness and strength of the prosthetic leg is tuned or adjusted based on a plurality of parameters.
  • the plurality of parameters include cane species, geometrical design of foot, diameter of cane, number of cane units, weight of a user person and an amount of leg activity expected from the user.
  • the foldable shape adapter is configured to adjust a height of the primary load bearing structures through a plurality of thin shims of the material of the foldable shape adapter.
  • the plurality of thin shims are wedged between the plurality of primary load bearing structures and the foldable shape adaptor.
  • the outer shell comprises a plurality of units that are designed to cover a plurality of parts of the prosthetic leg to provide a geometrical equivalent of a natural human leg.
  • the plurality of units of the outer shell are interconnected to one another to provide a stable overall structure.
  • the geometrical shape of the overall prosthetic leg is determined and the plurality of units of the outer shell is appropriately cut to provide a seamless overall structure and prevent an overlap of surfaces.
  • the outer shell is closed completely and sealed with a co-polymer, and wherein the copolymer that is resistant to water, air and dust.
  • the plurality of primary load bearing structures are coated with a thin multi-layer film to prevent abrasion of cane and provide a resistant against humidity and fire.
  • the thin multi-layer film comprises a natural latex film and co-polymer film.
  • the cane assembly is treated chemically to increase mechanical and thermal properties of cane.
  • a prosthetic leg structure includes a cane assembly at distal end.
  • a U-shaped heel contact is arranged in the cane assembly to provide springiness to the leg. When the heel is in contact with the ground, a flex is generated.
  • a C-shaped curve is provided in the cane assembly to provide flex and a bouncing movement.
  • the prosthetic leg is designed to store strained energy elastically and is more efficient than conventional prosthetic legs.
  • the prosthetic leg is designed to provide a lightweight structure for amputees.
  • the transfemoral prosthetic leg includes a knee suspension, a socket, a prosthetic knee joint, a leg cane and a heel cane. Further, the prosthetic leg is enclosed in a cosmetic cover.
  • the composition of socket includes materials such as plastic, composites, and the like.
  • the cosmetic cover is designed to provide a shape to the prosthetic leg.
  • the foot is designed with a foot cover comprising foam and polypropylene.
  • the leg cane is hinged to the socket, which is designed as per best medical practices.
  • the knee joint is designed and assembled as per best medical practice.
  • the prosthetic leg further includes friction grip attachments such as hose clamps. These attachments are provided to enable a person to adjust a height level of the leg.
  • pylon is provided with a large stress reducing adapter to attach the leg cane to the socket.
  • the pylon is a stainless tube.
  • a transtibial prosthetic legis comprises a knee brace suspension, a polypropylene socket, a polypropylene cosmetic cover, a leg cane and a heel cane.
  • the prosthetic leg is enclosed in a cosmetic cover having a thickness of two millimeters.
  • the cosmetic cover is made of polypropylene.
  • the foot is designed/covered with a foot cover made up of foam and polypropylene.
  • the prosthetic leg further includes friction grip attachments such as hose clamps. These friction grip attachments are provided to enable a person to adjust a height level of the leg.
  • a prosthetic leg comprises a cane socket that is connected to the residual limb.
  • the cane socket is woven into a mesh-like structure to provide breathability.
  • the cane socket is designed to conform to the shape of the human body in day-to-day activities.
  • a cane assembly provided in the prosthetic legs comprises one or more cane sticks for providing a compliance.
  • the flex-foot design of cane leg facilitates faster walking and decreases energy expenditure at similar speeds, compared to a conventional foot. Further, walking with the flex foot provides an improved range of ankle motion.
  • the cane leg functions as a flexible pylon that is deformed during a weight application or receiving a load or weight. The flexible pylon is further reformed to give a "pushing-off ' action/effect during un-weighing, and provides a dynamic elastic response for foot design.
  • a method is provided to determine/estimate the number of sticks required/used in cane pylon depending on a weight of a person.
  • the diameter and shape of the cane sticks are also determined/estimated based on at least one of the person's weight, type of usage and quality of cane material used.
  • a prosthetic leg structure for a person with Jaipur foot is provided.
  • Jaipur foot the person's foot does not flex.
  • the cane foot is implemented or provided to person with Jaipur foot to facilitate a flex motion, when the heel strikes the ground.
  • the cane foot is designed to reduce the effort and not just limited to, the lower extremity muscles of a person while walking..
  • a prosthetic leg structure that includes a cane assembly at distal end.
  • a U-shaped heel contact in the cane assembly provides springiness. When the heel contacts the ground, it causes flex.
  • the C-shaped curve in the cane assembly will flex and provide bouncing movement.
  • the prosthetic leg elastically stores strained energy and is more efficient than conventional prosthetic legs.
  • the prosthetic leg provides a lightweight structure for amputees.
  • the transfemoral prosthetic leg includes a knee suspension, a socket, a prosthetic knee joint, a leg cane and a heel cane. Further, the prosthetic leg enclosed in a cosmetic cover.
  • the composition of socket includes materials such as plastic, composites, and the like.
  • the cosmetic cover gives shape to the prosthetic leg.
  • the foot is designed with a foot cover comprising foam and polypropylene.
  • the leg cane is hinged to the socket, which is designed as per best medical practices.
  • the knee joint is designed and assembled as per best medical practice.
  • the prosthetic leg further includes friction grip attachments such as hose clamps. These attachments enable a person to perform height adjustments.
  • a transtibial prosthetic leg including a knee brace suspension, a polypropylene socket, a polypropylene cosmetic cover, a leg cane and a heel cane is provided.
  • the prosthetic leg is enclosed in a cosmetic cover constituting a thickness of two millimeters.
  • the cosmetic cover is made of polypropylene.
  • the foot is designed with a foot cover comprising foam and polypropylene.
  • the prosthetic leg further includes friction grip attachments such as hose clamps. These attachments enable a person to perform height adjustments.
  • pylon with large stress reducing adapter's attaches leg cane to the socket.
  • the pylon is a stainless tube.
  • a prosthetic leg that includes a cane socket that connects to the residual limb, is provided.
  • the cane socket is woven into a mesh-like structure to provide breathability.
  • the advantage of using the cane socket is that cane conforms to the shape of the human body in day- to-day activities.
  • a cane assembly used in the prosthetic legs that includes one or more sticks of cane sticks providing compliance.
  • the flex-foot design of cane leg facilitates faster walking and decreases energy expenditure at similar speeds, compared to a conventional foot. Further, walking with the flex foot provides an improved range of ankle motion.
  • the cane leg functions as a flexible pylon that deforms during weight acceptance and reforms to give a "pushing-off ' action during un-weighing, and provides a dynamic elastic response foot design.
  • a method to determine the number of sticks used in cane pylon depending on a person's weight is provided.
  • the diameter and shape of the cane sticks are also determined based on at least one of the person's weight, type of usage and quality of cane material used.
  • a prosthetic leg structure for a person with Jaipur foot is provided.
  • Jaipur foot the person's foot does not flex.
  • Implementation of cane foot in person with Jaipur foot facilitates flex motion when the heel strikes the ground.
  • the cane foot reduces the effort and not just limited to, the lower extremity muscles of a person while walking.
  • FIG. 1 illustrates an exemplary implementation of the trans femoral prosthetic leg in accordance with one embodiment of the present invention.
  • the transfemoral prosthetic leg includes a knee suspension 102, a socket 104, prosthetic knee joint 106, leg cane 112, and a heel cane 120.
  • the prosthetic leg is enclosed in a shield (rather than cover) 114.
  • the shield 114 is composed of polypropylene material that protects the internals from natural elements and impact and gives a desired shape to the prosthetic leg.
  • the foot is designed with a foot cover 118 comprising foam and polypropylene.
  • the leg cane 112 is hinged to the socket, which is designed as per best medical practices.
  • the knee joint 106 is designed and assembled as per best medical practice.
  • the prosthetic leg further includes attachments 108, for example hose clamps.
  • the attachments enable a person to perform dynamic alignment for correct gait such height adjustments, flexion and extension, inversion and eversion, etc.
  • an pylon 110 with stress reducing adaptors attaches cane element to the socket.
  • the leg cane 112 typically contains at least one or more sticks of cane with a complex curve/ compliance design facilitating forward movement of the leg with flex.
  • the heel cane 120 is a U-shaped design facilitating stability to the leg during walking.
  • the structure of prosthetic legs includes a foam structure taking the shape of legs with cosmetic cover and digitally printed cover.
  • the structure includes rubber (or like material) at the bottom of the cane heel.
  • the rubber sole provides traction. Further, the sole uniformly distributes load on the shoe. The load incurred during impact with the ground surface is in excess to be handled by a normal footwear. Further, the rubber sole protects the fabricated skin in the system from abrasion against footwear or external objects.
  • the cane pylon structure is encased in a cosmetic shell. Further, the cosmetic shell is coated with a skin colored layer. Further, the cane pylon includes a superficial cover that is a low strength material providing shape to the system. In one embodiment, the low strength structure includes foam material that is cut into the shape of legs.
  • FIG. 2 illustrates an exemplary implementation of the transtibial prosthetic leg in accordance with one embodiment of the present invention.
  • the structure includes a knee brace suspension 200, a socket 202, a cosmetic shield 206, a leg cane 210, and a heel cane 216.
  • the socket 202, and the cosmetic shield 206 is made of polypropylene.
  • the prosthetic leg is enclosed in a e cosmetic shield 206 constituting a thickness of 2 millimeters.
  • the foot is designed with a foot cover 212 comprising foam and polypropylene.
  • the prosthetic leg further includes attachments 204, for example hose clamps.
  • the attachments enable a person to perform dynamic alignment for correct gait such height adjustments, flexion and extension, inversion and eversion, etc.
  • a pylon 208 with stress reducing adaptors attaches cane element to the socket.
  • the polypropylene socket is replaced with a cane socket.
  • the cane socket is a cross-woven structure with a foam lining that connects to the residual limb.
  • the cane socket provides light weight and flexible prosthetic leg.
  • the cross-woven design of the cane socket provides breathability.
  • the cane socket is woven into a mesh-like structure to provide breathability. The advantage of using the cane socket is that it conforms to the shape of the human body in day to day activities.
  • FIG. 3 illustrates the structure of the cane leg, in accordance with one embodiment of the present invention.
  • the cane leg comprises at least two sets of cane sticks that acts as a flex-foot.
  • the flex-foot design of cane leg facilitate faster walking and decrease energy expenditure at similar speeds compared to a conventional foot. Further, walking with the flex foot provides an improved range of ankle motion.
  • the cane leg functions as a flexible pylon that deforms during weight acceptance and reforms to give a "pushing-off ' action during un-weighing and provides a dynamic elastic response foot design.
  • number of sticks used in cane pylon is determined depending on a person's weight. Further, diameter, and shape of the cane sticks is determined based on at least one of person's weight, type of usage, and quality of cane material used.
  • the most power-consuming phase when a person is walking is a mid-stance.
  • Mid stance is the phase after heel strike when the central of gravity shifts from one leg to another.
  • the cane pylon reduces the energy spent by a person during mid stance and facilitates buoyancy when force from one leg is transferred to another leg. Further, the light-weight design of the cane pylon provides ease of motion.
  • the person's foot does not flex. Implementation of cane foot in person with Jaipur foot, facilitates flex motion when the heel strikes the ground. Therefore, reduces the effort on the hip muscles of the person while walking.
  • the cane leg is manufactured with certain species of cane.
  • the properties of cane include twice the tensile strength of steel.
  • the composition of cane includes a bundle of fibers that makes it flexible. Since, cane is a creeper. Thus, the cross section of cane is consistent throughout. The maximum variation that occurs in the cross-section of cane is 2 mm, which makes cane an excellent engineering material.
  • the material used for pylon structure is vulcanized form of natural cane.
  • a material used for pylon structure is Cross-linked cane. The cross-linked cane exhibits comparatively higher tensile properties than natural cane.
  • a material used for pylon structure is bamboo.
  • FIG. 4 illustrates an exemplary illustration of a prosthetic leg designed for sports, in accordance with one embodiment of the present invention.
  • the sports legs are specially designed to help people in running.
  • a leg cane is hinged to the socket.
  • the leg cane acts as a spring and provides the flex required for running.
  • FIG. 5 illustrates a system of prosthetic leg structure with a cane assembly at distal end.
  • the system comprises an assembly of a plurality of primary load bearing structures 501, a foldable shape adapter 502 and a multi-part variable cosmetic shell 503.
  • the primary load bearing structures 501 are made up of cane and tuned to stiffness based on the type of user.
  • the foldable shape adapter 502 is a flat sheet of metal or plastic shaped in a particular geometry to allow the adapter to bend, wrap and transfer vertical and lateral forces and moments from a plurality of the primary load bearing structures that are of asymmetric in distribution.
  • the multi- part variable cosmetic shell 503 completely covers the primary load bearing structures 501 and acts as the outer shell for the prosthetic leg.
  • FIG. 6 illustrates a side-view of an exemplary primary load bearing structure assembly, in accordance with one embodiment herein.
  • FIG. 7 illustrates a front-view of an exemplary primary load bearing structure assembly, in accordance with one embodiment herein.
  • FIG. 8 illustrates a side-view of an exemplary primary load bearing structure assembly, in accordance with one embodiment herein.
  • FIG. 9 illustrates an isometric-view of an exemplary primary load bearing structure assembly, in accordance with one embodiment herein.
  • FIG. 10 illustrates an isometric-view of an exemplary primary load bearing structure assembly, in accordance with one embodiment herein.
  • FIG. 11 illustrates a bottom-view of an exemplary primary load bearing structure assembly, in accordance with one embodiment herein.
  • FIG. 12 illustrates a top-view of an unfolded variable shape adapter, in accordance with one embodiment herein.
  • FIG. 13 illustrates an isometric-view of a folded variable shape adapter, in accordance with one embodiment herein.
  • FIG. 14 illustrates a front-view of a folded variable shape adapter connected with a primary load bearing structure, in accordance with one embodiment herein.
  • the variable shape adapter 502 is connected with a primary load bearing structure assembly 501 through welding, clamping or bolts.
  • FIG. 15 illustrates an isometric-view of a multi-part variable cosmetic shell assembly, in accordance with one embodiment herein.

Landscapes

  • Health & Medical Sciences (AREA)
  • Transplantation (AREA)
  • Biomedical Technology (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

Les modes de réalisation de la présente invention concernent une structure de prothèse de jambe légère et économique mettant en œuvre un ensemble canne au niveau de l'extrémité distale, qui facilite une marche plus rapide et réduit la dépense d'énergie à des vitesses similaires comparativement aux vitesses d'un pied classique. La prothèse de jambe comprend un ensemble canne de structures de support de charge depuis l'extrémité des orteils jusqu'au genou. L'ensemble canne comprend de multiples structures de support de charge primaires qui proviennent de l'avant-pied et s'étendent jusqu'au genou. La rigidité des structures cannes est réglée de telle sorte que les structures latérales présentent une rigidité et une résistance plus élevées que les structures médianes. Une unité de talon centrale est reliée à l'extrémité inférieure et un adaptateur de forme pliable est relié à l'extrémité supérieure, qui agit en tant que mécanisme de lien de la prothèse de jambe au corps humain. Le revêtement extérieur de la prothèse de jambe est une enveloppe cosmétique à plusieurs parties personnalisée selon des besoins d'un utilisateur.
PCT/IN2017/050071 2016-02-22 2017-02-22 Système de prothèse de jambe WO2017145181A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016025618A1 (fr) * 2014-08-13 2016-02-18 Altair Engineering, Inc. Conception d'enveloppe de lame pour une prothèse de jambe

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016025618A1 (fr) * 2014-08-13 2016-02-18 Altair Engineering, Inc. Conception d'enveloppe de lame pour une prothèse de jambe

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