Thumb orthosis, in particular for relieving and / or treating rhizarthrosis, and method for manufacturing such an orthosis

Abstract

The subject of the present invention is a thumb orthosis (10) for relieving and / or treating rhizarthrosis comprising a stretchable textile tubular member (12) comprising a dorsal hand portion (20), a palmar hand portion (30), a thumb-index interdigital space portion (60) extending between first and second distal tubular portions (40, 50), a reversibly foldable thin spacer member (70), extending, at least partly, along the thumb-index interdigital space portion (60), a main return element (80) extending from the thumb-index interdigital space portion (60) into the palmar hand portion (20) while covering and surrounding, at least partly, the base of the thumb joint (16) and extending into the dorsal hand portion (30) by passing via the base of the thumb joint (16). The present invention also relates to a method for manufacturing such a thumb orthosis (10).

Description

[0001] Description

[0002] Title of the invention: Thumb orthosis, in particular for relieving and / or treating rhizarthrosis, method of manufacturing such an orthosis

[0003] Technical Field

[0004] The present invention relates to the technical field of thumb orthoses, in particular for relieving and / or treating rhizarthrosis.

[0005] The present invention also relates to the technical field of methods for manufacturing thumb orthoses, in particular for relieving and / or treating rhizarthrosis.

[0006] Prior art

[0007] Rhizarthrosis is an osteoarthritis affecting the joint at the base of the thumb, called the trapeziometacarpal joint. This pathology is a slow deterioration of the joint that creates frequent pain in the patient. The main consequences of this pathology are pain, more or less severe, and loss of mobility. In particular, the pinching movement between the index finger and the thumb becomes difficult to perform.

[0008] Medical orthoses are generally rigid in order to achieve a neutral immobilization position, particularly between the thumb and index finger, which is considered analgesic (see orthosis described in US 6,496,984). These orthoses prevent any movement between the thumb and index finger. However, patients need to move their thumb and index finger on a daily basis.

[0009] Soft, over-the-counter orthoses on the market, generally made of compressive textiles, may lack effectiveness because their support is insufficient and they do not have a thumb return system (see orthosis described in EP 2,526,794 Al).

[0010] FR 2,854,564 A1 relates to a thumb-wrist orthosis comprising a gauntlet comprising a dorsal face IA and a palmar face IB. The orthosis comprises an elastic blade 2 placed between the thumb and the index finger, as well as a first strap 3 surrounding the wrist to exert a recentering force F2 and a second strap 4 shown in the single figure and extending from the bottom of the thumb-index corner on the dorsal face IA in the direction of the ulnar edge of the hand, i.e. along the external or lateral side of the hand, to exert a force F3 which will cause the thumb and index finger to come together without having any effect on the position of the thumb in the plane of the hand.

[0011] US 9,549,836 B2 relates to an orthosis comprising a rigid spacing member for the thumb and index finger seeking to immobilize the thumb bone in all directions. There is therefore a need for a thumb orthosis making it possible to relieve pain linked to rhizarthrosis, and to facilitate, or allow the regaining of, the pinching movement between the thumb and index finger.

[0012] There is a need for a thumb orthosis to relieve rhizarthrosis, easy to put on, lightweight, and whose relief / treatment provided can be modulated.

[0013] The present invention thus seeks to propose a dynamic thumb orthosis allowing the pinching movement between the thumb and index finger while promoting a return to an analgesic position, and in particular having a compressive effect.

[0014] Statement of the invention

[0015] The present invention addresses the aforementioned problems in that it relates, according to a first aspect, to a thumb orthosis, in particular for relieving and / or treating rhizarthrosis, advantageously comprising an extensible textile tubular member comprising:

[0016] - a dorsal part of the hand and a palmar part of the hand, and

[0017] - a first distal tubular part comprising an exit opening at least for the index finger, and

[0018] - a second distal tubular portion comprising a thumb exit opening, and

[0019] - a thumb-index finger notch portion extending between said first and second distal tubular portions.

[0020] Advantageously, said orthosis further comprises:

[0021] - a thin and reversibly foldable spacer member extending, at least in part, along the thumb-index finger notch portion, in particular of the textile tubular member, and bearing against a lateral side of the second distal tubular part and against a medial side of the first distal tubular part so as to separate the thumb from the index finger; and - a main return element, in particular extensible, comprising a first portion and a second portion, said main return element extending from its first portion arranged in the palmar part of the hand, from the thumb-index finger notch portion by covering and surrounding at least in part the base of the thumb joint and extending into the dorsal part of the hand passing through the base of the thumb joint.

[0022] Advantageously, the main return element, in particular extensible, relieves the joint at the base of the thumb, i.e. the trapeziometacarpal joint, by exerting traction from the thumb-index finger notch portion, on the palmar surface of the hand, surrounding said thumb joint, then projects onto the dorsal surface of the hand, at least partially surrounding the wrist.

[0023] Advantageously, the main return element is arranged to exert a force on the base of the thumb joint, from the palmar surface towards the dorsal surface, or from the palmar part of the hand towards the dorsal part of the hand, in particular in order to move the base of the thumb joint away from the palmar surface of the hand. Advantageously, the particular arrangement of the main return element makes it possible to move the thumb and index finger apart while pushing the trapeziometacarpal joint back into the plane of the hand in order to put it at rest.

[0024] Advantageously, the thumb-index finger notch portion provides the connection between said first and second distal tubular parts, and / or between the thumb and the index finger (of the hand of the wearer of the orthosis). Advantageously, the main return element pushes the joint at the base of the thumb, and therefore the thumb, towards the dorsal face of the hand, while rhizarthrosis tends to pivot said joint towards the inside of the hand, i.e. the palmar face of the hand.

[0025] Stretchable textile tubular member

[0026] The extensible textile tubular member advantageously has a general shape of a tubular envelope, with in particular a lower opening for introducing the hand, more particularly into the interior volume of the extensible tubular member. Advantageously, the extensible textile tubular member comprises a first distal tubular part comprising an exit opening for at least the index finger, and possibly the middle finger, the ring finger and the little finger.

[0027] Advantageously, the textile tubular member extends substantially from a lower edge or from the opening for introducing the hand (which when worn possibly covers at least part or all of the wrist) then comprises dorsal hand and palmar hand parts, in particular connected or joined to each other, forming the first and second distal tubular parts.

[0028] Advantageously, the palmar part of the hand of the tubular textile member is configured to extend when worn substantially at least from the base of the index finger (in particular at least from the base of the middle finger, the ring finger and the little finger) then extends over the index finger-thumb notch, and extends substantially towards the wrist (possibly at least partially or completely covering the wrist), in particular passing through the base of the thumb joint.

[0029] Advantageously, the palmar portion of the hand of the textile tubular member is configured to cover substantially the entire natural palmar surface of the hand when worn.

[0030] Advantageously, the dorsal part of the hand is configured to extend substantially at least from the base of the index finger (in particular at least from the base of the middle finger, the ring finger and the little finger) then over the index finger-thumb notch, and extends substantially towards the wrist (possibly at least partially or completely covering the wrist), in particular passing through the base of the thumb joint.

[0031] Advantageously, the dorsal hand portion of the textile tubular member is configured to cover substantially the entire natural dorsal surface of the hand when worn. Advantageously, the thumb orthosis has a general shape that is substantially like a mitten. Advantageously, the thumb orthosis, or the textile tubular member, does not cover the distal and intermediate phalanges, and possibly does not cover at least in part the proximal phalange(s), of the index finger and / or the middle finger and / or the ring finger and / or the little finger. In one example, the thumb orthosis, or the textile tubular member, does not cover the distal phalanx, and possibly at least in part the intermediate phalanx, of the thumb.

[0032] In one example, the thumb orthosis, or textile tubular member, covers the middle phalanx of the thumb, and possibly at least partially the distal phalanx of the thumb.

[0033] The natural palmar surface of the hand or palmar part of the hand is understood to mean the surface or part covering the palm of the hand, and possibly the base of the finger(s) of the hand (including the thumb).

[0034] The palm refers to the front of the hand, i.e. the part between the wrist and the base of the fingers.

[0035] The dorsal surface of the hand or dorsal part of the hand is understood to mean the surface or part covering the back of the hand, and possibly substantially the base of the finger(s) of the hand.

[0036] Advantageously, the extensible textile tubular member comprises a lateral side and a medial side.

[0037] The lateral side of the tubular member advantageously corresponds to the lateral side of the hand or external side of the hand passing through the little finger.

[0038] The medial side of the tubular member advantageously corresponding to the medial side of the hand or internal side of the hand passing through the thumb.

[0039] The lateral side of the first or second distal tubular part corresponds to the side of said tubular part oriented towards the lateral side of the textile tubular member or of the hand, or oriented towards the external side of the textile tubular member or of the hand.

[0040] The medial side of the first or second distal tubular portion corresponds to the side of said tubular portion oriented towards the medial side of the main tubular member or hand, or oriented towards the internal side of the main tubular member or hand.

[0041] Preferably, the extensible textile tubular member comprises an upper boundary comprising / passing through / formed of at least the index finger exit opening of the first distal tubular portion, the thumb-index finger notch portion, and the thumb exit opening of the second distal tubular portion.

[0042] Preferably, the extensible textile tubular member comprises a lower border comprising / passing through / formed by the hand insertion opening or the lower border, in particular covering at least in part the palmar part of the hand and / or the dorsal part of the hand or at least in part the wrist on the anterior and / or posterior face of the hand.

[0043] Preferably, the extensible textile tubular member has a tubular shape closed by at least one securing zone, for example comprising one or more seams, one or more welds, or one or more fused portion(s), one or more bonding agent(s), or a combination of these.

[0044] Preferably, the extensible textile tubular member comprises, in particular is formed of, one or more textile insert(s), more preferably one or more knitted, or woven, or braided insert(s), or a combination thereof.

[0045] Preferably, the textile tubular member, or the textile insert(s), comprises (or each comprises) one or more elastic thread(s), in particular knitted.

[0046] Preferably, the elastic thread(s) (in particular of a region of the textile tubular member not comprising a return element) comprises / comprise an elastic core, for example made of elastane, and optionally one or more covering thread(s), for example covered or applied by air jet.

[0047] Preferably, the elastic core has a linear mass greater than or equal to 20 dtex, or 50 dtex, and in particular less than or equal to 500 dtex, more particularly less than or equal to 300 dtex or 200 dtex or 100 dtex or 50 dtex.

[0048] Preferably, the elastic core comprises / is a multifilament yarn, or a monofilament yarn.

[0049] Advantageously, the term “extensible textile tubular member” is understood to mean that the latter comprises one or more textile portion(s) capable of elongating by at least 10% or 20% or 30% or 40% or 50%, preferably at least 75%, and of recovering its initial shape with a residual deformation less than or equal to 10% or 5%, in particular in the warp direction or the columns of stitches and / or in the weft direction or the rows of stitches.

[0050] The force applied to obtain an elongation among those mentioned is preferably less than or equal to 50N / cm or 30N / cm, preferably to obtain an elongation greater than or equal to 10% and less than or equal to 100% or 50%.

[0051] Advantageously, the textile tubular member has a thickness less than or equal to 10 mm, or 8 mm or 6 mm or 4 mm, preferably less than or equal to 3 mm or 2 mm or 1 mm.

[0052] Advantageously, the textile tubular member has a thickness greater than or equal to 0.3 mm or 0.5 mm.

[0053] Advantageously, since the tubular textile member is stretchable, the thumb orthosis applies a certain compression to the hand, which helps to improve the feeling of support, proprioception and support of the hand in everyday movements.

[0054] Preferably, the textile tubular member, or the textile insert(s) that said textile tubular member comprises, each has / have a strength greater than or equal to 0.5 N / cm, in particular greater than or equal to 1.5 N / cm, more particularly less than or equal to 5 N / cm, for example of the order of 2.5 N / cm to + / - 1 N / cm, at an elongation of 20% or 30% or 40%, preferably at an elongation of 40%, in particular in the warp direction or of the columns of stitches and / or in the weft direction or of the rows of stitches.

[0055] In one embodiment, the textile tubular member comprises an open slot opening onto the hand insertion opening, in particular arranged so as to at least partially cover the external or lateral side of the hand and possibly the wrist.

[0056] In particular, said slit is arranged between a lateral portion of the palmar part of the hand, and a lateral portion of the dorsal part of the hand. Preferably, said slit does not open onto the upper border of the textile tubular member.

[0057] Advantageously, said slot opens onto the lower edge of the textile tubular member. The textile tubular member comprises an inner face and an outer face, in particular substantially opposite the inner face, in particular substantially parallel to each other. The inner face is preferably oriented towards the interior volume for receiving at least part of the hand, and possibly at least part of the wrist. The outer face is preferably oriented towards the outside of the tubular member.

[0058] Preferably, the measurement of the elongations and forces in N / cm obtained for the textile tubular member or for the main return element is carried out in this text according to the NF EN ISO 20932 standard dated February 2020. This standard is entitled “Determination of the elasticity of fabrics”. In particular, the principle is that a fabric specimen of specified dimension is stretched at a constant speed to either a specified force or a specified elongation for an agreed number of cycles, and its elasticity is determined by measuring several characteristics. The constant elongation rate apparatus is defined in point 6 of said standard and must in particular be able to operate at constant elongation rates, in particular at an elongation rate of 100 mm per minute. The fabric specimen tested may be in strip form (method A) or in a loop (method B), preferably in a strip form (method A).

[0059] Main reminder element

[0060] Advantageously, the first and second portions of the main return element are the first and second terminal ends of the main return element. Advantageously, the main return element is elongated in that it has a length greater than its width, in particular its length may be at least 1.5 times or twice or three times greater than its width. In one embodiment, the main return element comprises one feature, or several combined features, selected from the following features:

[0061] - the first portion, in particular the terminal end, comprises a notched region, in particular arranged to fit the border of the thumb-index notch portion;

[0062] - the width of the main return element increases from the first portion to form a region of envelopment of the palm of the thumb, in particular then decreases towards the second portion; has a generally substantially pear shape;

[0063] - comprises a thumb palm wrapping region, in particular arranged in the palmar hand portion of the textile tubular member, having a maximum width greater than the width of the second portion, in particular greater than or equal to less than 1.5 times or at least twice the width of the second portion;

[0064] - comprises a thumb palm wrapping region disposed in the palmar hand portion of the textile tubular member;

[0065] - the second portion has a strip-like shape.

[0066] Advantageously, the main return element comprises / is formed from a part, in particular a strip, or from several parts, in particular strips, arranged one after the other, in particular substantially in a contiguous manner.

[0067] Advantageously, the main return element has a minimum width greater than or equal to 10 mm or 20 mm or 25 mm, preferably greater than or equal to 25 mm. Advantageously, the main return element has a maximum width less than or equal to 80 mm or 70 mm or 60 mm or 50 mm or 45 mm or 40 mm.

[0068] Advantageously, the main return element has a thickness less than or equal to 6 mm or 4 mm or 3 mm or 2 mm.

[0069] Advantageously, the main return element is extensible in that it can deform / elongate longitudinally by at least 30% or 40% or 50% or 60% or 80%, more preferably by at least 100%, under a determined force and recover its initial shape at rest (without application of deformation force) with a residual deformation less than or equal to 5%, preferably less than or equal to 2%.

[0070] Advantageously, the main return element has a longitudinal direction from its first portion, or first terminal end, towards its second portion, or second terminal end.

[0071] In a first embodiment, the main return element is, or comprises a return element, in textile connection with the textile tubular member, in particular is integrated by knitting or weaving during the weaving or knitting of the textile tubular member (in particular called temporary) or of the textile insert(s) that said tubular member comprises. Preferably, in this case, the main return element comprises one or more elastic thread(s), in particular comprising an elastic core possibly covered by one or more covering thread(s), having a linear mass greater than or equal to 200 or 300 dtex, more preferably greater than or equal to 500 dtex or 600 dtex. Advantageously, the elastic core has a linear mass greater than or equal to 200 or 300 dtex, in particular greater than or equal to 500 dtex or 700 dtex, in particular less than or equal to 1500 dtex.

[0072] Preferably, a return element (main or auxiliary) comprises one or more woven elastic thread(s).

[0073] In a second embodiment, the main return element is, or comprises, at least one polymeric layer having a determined part shape (in particular in the form of a strip), in particular a layer in at least one elastomer (for example polyurethane or silicone), optionally combined with one or more other polymeric layer(s) and / or one or more textile layer(s) (e.g. knitted and / or woven and / or braided and / or nonwoven), in particular also having a determined part shape, for example in the form of a strip. Preferably, in this case, the main return element is secured to the internal face and / or to the external face of the main tubular member, for example by a bonding agent, a (thermal) weld, a seam, a braid, a heat-sealing agent, or a combination thereof.

[0074] Preferably, the main return element is secured (in particular adheres) along substantially all or part of its internal surface to the textile tubular member, in particular is secured (in particular adheres) along substantially all of its internal surface, more particularly with the exception of its first terminal portion and / or its second terminal portion remaining free and grippable.

[0075] It is possible for the first terminal portion and / or the second terminal portion of the return element to be secured to the textile tubular member or in connection with the textile tubular member in that it / they project from the latter in order to each have a free terminal end. The polymeric layer(s) and / or the textile layer(s) (e.g. knitted and / or woven and / or braided and / or nonwoven) preferably has / have (each) the arrangement and / or the disposition and / or the length and / or the width of the main return element defined in the present text.

[0076] The first embodiment can be combined with the second embodiment (if a very high restoring force is sought for example and to stiffen the tubular member). In particular, a main restoring element comprises the combination of elastic thread(s) knitted or woven in the textile insert(s) of the tubular member with one or more textile layer(s) and / or one or more polymeric layer(s).

[0077] Preferably, the main return element extends from its first portion, or its first end, of the index finger-thumb notch portion, on the palmar part of the hand (in particular on the palmar face of the hand), substantially surrounding the base of the thumb, in particular the base of the trapeziometacarpal joint and / or substantially the palm of the thumb, up to near the lower border or the opening for introducing the hand of the textile tubular member, then extends towards the medial side of the tubular member in the dorsal part of the hand, possibly at least partially surrounding the wrist.Advantageously, the second portion or second end of the main return element ends / is arranged in a region arranged between the medial and lateral sides of the dorsal part of the hand, or substantially close to the lateral side of the tubular member or close to the lateral side of the dorsal part of the hand, or possibly extends towards / returns towards the palmar part of the hand (in particular close to the lateral or external side of the palmar part of the hand).

[0078] The definitions / embodiments described in this text with reference to the tubular member apply to the substantially flat temporary tubular member (in particular described in this text with reference to the method of manufacturing the orthosis).

[0079] Thin, reversibly bendable spacer member

[0080] Said spacer member may comprise, or be, one or more spacer piece(s) chosen from: a part textile piece, a polymeric piece, a foam piece, a metal piece (for example a spiral rib), or a combination thereof, and optionally two or more of said piece(s) are at least partially superimposed and / or assembled.

[0081] Said spacer member may comprise, or be, one or more at least partly textile part(s) and / or one or more polymeric part(s), or one or more at least partly textile part(s) and / or one or more polymeric part(s) assembled, and optionally of which two or more of said at least partly textile part(s) and / or said polymeric part(s) are at least partially superimposed.

[0082] A polymeric part may comprise, or be, a foam layer or a coated, or impregnated, or laminated polymeric layer (such as a thermally bonded polymeric film), in particular forming a polymeric coating.

[0083] A polymeric part may comprise, or be, an elastomeric layer, for example a silicone or TPE (thermoplastic elastomer) layer, particularly in a polyurethane elastomer.

[0084] A part at least partly textile may comprise, or be: - a textile part (for example a fabric, a knit, a braid, a nonwoven, or a combination of these) possibly associated, in particular secured, with one or more polymeric part(s), in particular one or more layer(s) of foam and / or one or more coated or impregnated or laminated polymeric layer(s).

[0085] In this text, an at least partly textile part is understood to mean any part formed partially from a textile (and therefore possibly formed from one or more other materials such as a polymeric part), or a textile part.

[0086] For example, an at least partly textile part may comprise, or be, a textile part coated with one or more polymeric layer(s), in particular on a first face and / or a second face of said textile part.

[0087] For example, a spacer piece (in particular an at least partly textile piece, or a textile piece) comprises a first face and a second face that are substantially opposite, in particular parallel. Preferably, the first and second faces are the two majority surfaces of the spacer piece, in particular of the at least partly textile piece or of the textile piece.

[0088] Advantageously, a spacer piece (in particular an at least partly textile piece, or a textile piece, or a polymeric piece) has a strip shape.

[0089] For example, a strip has a thickness greater than 0 mm and less than or equal to 10 mm, in particular less than or equal to 8 mm or 6 mm or 4 mm or 3 mm or 2 mm.

[0090] For example, the band has a width greater than or equal to 5 mm and less than or equal to 30 mm or 25 mm or 20 mm.

[0091] For example, the strip has a length greater than or equal to 10 mm and less than or equal to 100 mm, in particular less than or equal to 90 mm or 80 mm or 70 mm or 60 mm.

[0092] In a preferred example, the strip has a length of about 90 mm at + / - 20% and / or a width of 20 mm at + / - 20%.

[0093] Preferably, a spacer piece comprises, or is, at least one textile piece optionally combined with at least one polymeric piece and / or at least one heat-sealing layer, in particular a heat-activatable polymeric layer for its bonding to the textile tubular member and / or to another piece of the spacer member.

[0094] Preferably, said spacer member comprises, or is, an assembly comprising, in particular consisting essentially of, one or more spacer pieces (in particular one or more pieces at least partly textile, and / or one or more polymeric pieces) of which at least one or more spacer pieces (in particular one or more pieces at least partly textile and / or one or more polymeric pieces) is / are secured to the external face of the textile tubular member, and / or to the internal face of the textile tubular member. For example, the spacer member comprises at least one textile portion of the textile tubular member, in particular said textile portion is arranged in a sandwich between at least two spacer pieces, in particular as described in the present text.Said spacer member, and / or a spacer piece, is substantially flat before its attachment to the thumb-index finger notch portion so that it stiffens this portion by virtue of its thickness and the nature of the spacer piece(s) that it comprises, but in a limited manner so as to allow the thumb-index finger clamp movement.

[0095] Advantageously, the spacer member, and / or a spacer piece, is elongated in that it has / includes a length greater than its width, in particular its length is greater than or equal to twice or three times or four times its width.

[0096] Advantageously, the spacer member, and / or a spacer piece, has a width less than or equal to two times, three times, or four times its length.

[0097] Advantageously, the spacer member comprises / is formed by the spacer piece(s) arranged in the different thumb-index finger notch portion(s) of the textile tubular member.

[0098] In one embodiment, the spacer member, and / or a spacer piece, has a total thickness, in particular maximum, less than or equal to 10 mm, in particular less than or equal to 8 mm or 6 mm or 4 mm or 3 mm or 2 mm or 1 mm.

[0099] Advantageously, the total thickness of the spacer member corresponds to the total thickness of the thumb orthosis in the notch region extending between the thumb and the index finger, in particular less the thickness of the textile tubular member (in particular this is low of the order of approximately 1 mm to + / - 0.5 mm).

[0100] Advantageously, the spacer member, and / or a spacer piece, is reversibly foldable in that it is possible to fold it reversibly, in particular to bring together two portions of its length which are spaced apart from each other, in particular so as to bring them into contact with each other, in a folded position or first position, and to separate said two portions so that they are not in contact in a spaced apart position or second position. Advantageously, the transition from the first position to the second position, and vice versa, is obtained by the pinching movement between the thumb and index finger.

[0101] Advantageously, the combination of several thin and reversibly foldable spacer pieces allows the pinching movement between the thumb and index finger in a first position but also the positioning in an antalgic position corresponding to the second position. This arrangement contributes to the thumb orthosis according to the invention being a dynamic orthosis, thus allowing natural movements of the hand, while offering the advantages of a so-called rigid orthosis promoting an antalgic position at rest.

[0102] The main booster element also contributes to this analgesic effect by pushing the thumb towards the outside of the palmar surface of the hand.

[0103] Preferably, the spacer member extends along all or part of the length of the thumb-index finger notch portion, in particular over at least 50% or 80% or substantially 90% of said length.

[0104] Preferably, the length of the notch portion is the length between the distal end of the second distal tubular part (in particular arranged along its lateral side) and the distal end of the first distal tubular part (in particular arranged along its medial side).

[0105] In an alternative embodiment, the orthosis comprises a tightening strap comprising a first portion connected to the second portion of the main return element, said tightening strap further comprises a second gripping portion, possibly free, comprising a first securing member, and the orthosis comprises a second securing member configured to cooperate for its removable securing with the first securing member of the tightening strap.

[0106] The tightening strap may be extensible or non-extensible (for example, have an elongation less than or equal to 10% under a force of approximately 50 N or 100 N applied longitudinally, in particular a force applied manually).

[0107] Advantageously, the tightening strap is elongated. Preferably, the tightening strap extends in length between first and second portions, optionally which are first and second terminal ends of the tightening strap.

[0108] For example, the tightening strap comprises a first portion, or first terminal end, connected, in particular secured, to the dorsal part of the hand (or possibly to the palmar part of the hand), in particular in a wrist region and / or in a region close to the opening for introducing the hand or the lower border of the tubular member. The securing can be carried out by gluing, by sewing, by welding, using a heat-sealing veil, or a combination of these.

[0109] For example, the tightening strap comprises a first portion, or a first terminal end, slidably mounted on the dorsal part of the hand (or possibly on the palmar part of the hand), in particular in a wrist region and / or in a region close to the hand insertion opening or the lower border of the tubular member. In particular, the orthosis comprises one or more through opening(s) provided in the dorsal part of the hand, or possibly in the palmar part of the hand, forming one or more loop(s), in particular in a wrist region and / or in a region close to the hand insertion opening or the lower border of the tubular member, in particular in the second portion of the main return element (and possibly in the tubular member).

[0110] It is understood by the first portion of the tightening strap is in connection with the second portion of the main return element, in particular also in connection with the tubular member, that the first portion is fixedly secured to said second portion of the return element or is movably secured, for example mounted in a sliding manner relative to the tubular member.

[0111] The length of the first portion and therefore according to which the tightening strap is connected, in particular secured or for example mounted in a sliding manner relative to the tubular member, to the dorsal part of the hand, or to the palmar part of the hand, is variable according to the force that one wishes to apply in connection with the tubular member.

[0112] Preferably, the tightening strap comprises a portion of its length, at least approximately 30% of its length, more preferably at least 50% of its length, which is free, i.e. which is not directly secured to the tubular member.

[0113] This arrangement makes it easier to handle the tightening strap.

[0114] Advantageously, the first securing member is arranged on one of the faces, in particular on the internal or external face, of the second portion, or second end, of the tightening strap, and comprises / (is formed of) hooks or loops, or at least one magnet, or a part of a press stud, preferably hooks.

[0115] Advantageously, the second securing member is arranged, in particular on the external face, in a wrist region of the palmar part of the hand, or possibly in a wrist region of the dorsal part of the hand, preferably and close to the lower border or the insertion opening of the tubular member. Preferably, the second securing member comprises hooks, or loops, at least one magnet, or a part of a press stud, preferably loops.

[0116] The first and second securing members may be the hooks and loops of a hook-and-loop fastening system.

[0117] In one embodiment, the tubular member, in particular the dorsal part of the hand or the palmar part of the hand, comprises, more particularly in a wrist region adjacent to the lateral side of said dorsal part of the hand and / or to the lateral side of the palmar part of the hand, one or two through slots through which a portion of the tightening strap, in particular its first portion, is passed so as to form a return loop.

[0118] In an alternative embodiment, the first portion of the tightening strap is connected to the second portion of the main return element in the dorsal hand portion of the textile tubular member.

[0119] Advantageously, this arrangement makes it possible to apply a restoring force to the joint at the base of the thumb towards the dorsal side of the hand, and therefore in an antalgic position. In addition, the tightening stroke is shorter when the second portion of the restoring element is arranged in the dorsal part of the hand of the tubular member than if it had been arranged in the palmar part of the hand.

[0120] In an alternative embodiment, the tightening strap extends from its first portion in the dorsal hand portion of the textile tubular member, at least partially surrounding the wrist, in a direction opposite to the second distal tubular portion, in particular then extends towards the palmar hand portion in the direction of the second distal tubular portion. This arrangement improves ergonomics and allows intuitive operation of the orthosis.

[0121] In an alternative embodiment, the second securing member is arranged in the palmar part of the hand of the textile tubular member, in particular at least partially covering the wrist.

[0122] This arrangement also promotes ergonomics and comfort.

[0123] In an alternative embodiment, the textile tubular member comprises a lateral slit at least partially releasing the external side of the wrist, in particular arranged on the lateral side of said textile tubular member, and separating a lateral portion of the dorsal part from a lateral portion of the palmar part.

[0124] This arrangement facilitates the cooperation of the tubular member with the tightening strap since the lateral sides can be brought together more easily in the space created by the slot, without creating folds, to place the thumb joint in an antalgic position. Ergonomics and comfort are also improved.

[0125] This arrangement also makes it easier to put on the orthosis.

[0126] In a sub-variant embodiment, in a position in which the first and second securing members cooperate together for their securing, in particular removable, the first portion of the tightening strap is connected to said portion of the dorsal part, and a (other) portion of the tightening strap, possibly the second portion of the tightening strap, is connected to said portion of the palmar part of the hand.

[0127] In this position, the tightening strap reinforces the applied restoring force of the main restoring element by pushing the base of the joint towards the posterior face of the hand.

[0128] The joining of the first and second joining members in the palmar part of the hand makes it easier for the wearer to access the second portion of the tightening strap and allows them to be hidden from the outside, which is more aesthetic.

[0129] In an alternative embodiment, the textile tubular member comprises a knitted or woven textile having a surface mass greater than or equal to 20 g / m 2 or at 30g / m 2 , in particular less than or equal to 300 g / m 2 or 150 g / m 2 or 100 g / m 2 In an alternative embodiment, the tubular textile member comprises an openwork knitted or woven textile, in particular of the mesh or tulle type.

[0130] For example, tulle has a surface mass of approximately 230 g / m 2 at + / - 50 g / m 2 .

[0131] Advantageously, tulle improves breathability (i.e. the evacuation of perspiration and / or heat) and allows for rapid drying after washing.

[0132] In another variant, the textile tubular member comprises a knitted or woven textile having a surface density greater than or equal to 250 g / m 2 , preferably greater than or equal to 300 g / m 2 , in particular less than or equal to 600 g / m 2 or 500 g / m 2 .

[0133] Advantageously, this type of tubular member is chosen when seeking to increase the compression exerted on the hand, and improve the mechanical resistance. In an alternative embodiment, the spacer member comprises one or more spacer part(s) chosen from: a textile part, a foam part, a metal part, a polymeric layer, in particular a coating or laminate, or a combination of these.

[0134] In an alternative embodiment, the spacer member has a thickness less than or equal to 10 mm, preferably less than or equal to 5 mm.

[0135] In an alternative embodiment, the spacer member is secured by at least one of the following elements: a bonding agent, a weld, and a seam, in the thumb-index finger notch portion of the textile tubular member.

[0136] In one variant, the orthosis, in particular the textile tubular member, comprises a sheath arranged in the thumb-index finger notch portion and configured to receive said spacer member, in particular an elastomeric molded part, preferably said spacer member is removably arranged in the sheath.

[0137] This arrangement allows the force applied by the spacer member to be modulated. In addition, the spacer piece can be removed, making it easier to wash the thumb brace.

[0138] In an alternative embodiment, the spacer member comprises at least one spacer piece arranged, in particular secured, to the external face of the thumb-index finger notch portion, and / or at least one spacer piece arranged, in particular secured, to the internal face of the thumb-index finger notch portion.

[0139] This arrangement allows the tubular textile member to be sheathed in this region, thus improving ergonomics and comfort. The spacer member is advantageously lighter and simpler to use. The manufacture of the orthosis is also facilitated.

[0140] In an alternative embodiment, the first distal tubular part has an axis of revolution L1 and the second distal tubular part has an axis of revolution L2, and in that L1 and L2 pass through respective planes PI and P2 forming between them an internal angle greater than or equal to 30° or 40°, in particular less than or equal to 100° or 60°.

[0141] In an alternative embodiment, the orthosis comprises an auxiliary return element, in particular extensible and / or elongated, comprising a first portion extending in the dorsal part of the hand from the thumb-index notch portion, covering and surrounding at least in part the base of the thumb joint and extending in the dorsal part of the hand as far as the main return element.

[0142] This arrangement allows the restoring force to be increased.

[0143] In an alternative embodiment, the main return element, or the auxiliary return element, is chosen from:

[0144] - a part, in particular a strip, comprising a textile part, in particular a textile strip, a part, in particular a strip, in a polymeric layer (in particular coating or laminated), or a combination of the latter, or several of said parts, in particular strips, in the extension of each other; and / or

[0145] - a textile portion of the textile tubular member comprising one or more elastic thread(s), in particular woven thread(s).

[0146] In an alternative embodiment, the textile tubular member comprises a clamp arranged in the dorsal part of the hand and extending, in particular longitudinally, from the thumb-index finger notch portion, in particular along at least part of the lower portion of the second distal tubular part, towards an opening for introducing the hand or towards a lower edge of the tubular member. Advantageously, said clamp makes it possible to bring the second tubular part towards the dorsal part of the hand, and therefore the thumb towards the natural dorsal part of the hand (i.e. reinforce the traction of the thumb in the analgesic position).

[0147] Advantageously, said clamp comprises first and second clamp edges of the tubular member which are adjacent and secured to each other, in particular by at least one seam and / or a textile reinforcement.

[0148] This arrangement also allows, combined with the extensible character of the textile tubular member, to confer a compression function to the thumb orthosis.

[0149] The subject of the present invention is a method for manufacturing a thumb orthosis, in particular according to any one of the variant embodiments with reference to the first aspect of the invention, in particular for relieving and / or treating rhizarthrosis, comprising the steps:

[0150] - a) providing a substantially planar temporary extensible textile member having a determined configuration, a thin and reversibly pliable spacer member, and a main return element comprising a first portion and a second portion;

[0151] - b) shaping the temporary three-dimensional extensible textile member so as to form a tubular textile member comprising a dorsal hand portion and a palmar hand portion, and in particular an opening for introducing the hand, and

[0152] - a first distal tubular part comprising an exit opening at least for the index finger, and

[0153] - a second distal tubular portion comprising a thumb exit opening, and

[0154] - a thumb-index notch portion extending between said first and second distal tubular portions,

[0155] - arranging, in particular securing, the spacer member in the thumb-index finger notch portion during step b), or after step b), so that said spacer member bears against a lateral side of the second distal tubular part and against a medial side of the first distal tubular part, in particular in order to separate the thumb from the index finger; and - the main return element is integrated, or secured, to the temporary extensible textile member or to the extensible textile tubular member so that the main return element extends from its first portion, in the palmar part of the hand, of the thumb-index finger notch portion by covering and surrounding at least in part the base of the thumb joint and extends into the dorsal part of the hand passing through the base of the thumb joint.

[0156] The spacer member may be secured in the thumb-index finger notch portion after the latter has been formed, or preferably is secured in the thumb-index finger notch portion of the tubular member during shaping of the temporary extensible textile member, in particular during securing of the edges of the temporary member in the thumb-index finger notch portion.

[0157] In an alternative embodiment, the temporary extensible textile member comprises an upper edge, in particular an upper border, and a lower edge, in particular a lower border, and the temporary extensible textile member comprises a through opening, in particular a slit open on said upper edge, and extending substantially from the thumb-index notch portion in the dorsal part of the hand of the temporary extensible textile member and towards the lower edge of said temporary extensible textile member.

[0158] Advantageously, said through opening, or slot, allows the creation of a clamp.

[0159] Advantageously, said clamp comprises first and second clamp edges which are joined and secured together, in particular by a seam and / or a textile reinforcement (possibly comprising a heat-sealing material).

[0160] This arrangement makes it possible to orient / push the second distal tubular part receiving the thumb towards the back of the hand and therefore promotes its separation from the palm of the hand. Preferably, said clamp is closed, i.e. comprises first and second edges which are joined and secured together directly or by means of one or more parts, for example one or more heat-sealing strips.

[0161] Preferably, the clamp is formed during the volume setting step b). The variants and / or embodiments, definitions, with reference to the first aspect of the invention and to the second aspect of the invention, can be combined with each other, independently of each other.

[0162] Description of the drawings

[0163] The present invention will be better understood by reading the following embodiments, cited without limitation, and illustrated by the figures in which:

[0164] [Fig.l] Figure 1 schematically represents, seen from a palmar side, a first example of a thumb orthosis according to the invention (for a left hand);

[0165] [Fig.2] Figure 2 schematically represents, seen substantially along a dorsal face and in profile, the first example of thumb orthosis shown in Figure 1;

[0166] [Fig.3] Figure 3 schematically represents, seen from the dorsal side, the first example of a thumb orthosis according to the invention;

[0167] [Fig. 4] Figure 4 schematically represents a view from a dorsal side of a second example of a thumb orthosis according to the invention (for a right hand);

[0168] [Fig.5] Figure 5 schematically represents, seen substantially along a palmar face, the second example of thumb orthosis shown in Figure 4;

[0169] [Fig.6] Figure 6 schematically represents a profile view and from its lateral side the second example of thumb orthosis of Figures 4 and 5;

[0170] [Fig.7] Figure 7 schematically represents, seen substantially along a palmar face, a third example of a thumb orthosis (for a left hand);

[0171] [Fig.8] Figure 8 schematically represents, seen substantially along a dorsal face, the third example of thumb orthosis of Figure 7;

[0172] [Fig.9] Figure 9 schematically represents a first example of a temporary flat extensible textile tubular member (notably for a left hand).

[0173] Description of the embodiments

[0174] Figure 1 shows a first example of a thumb orthosis 10, in particular for relieving and / or treating rhizarthrosis, comprising an extensible textile tubular member 12. The extensible tubular member 12 comprises a hand insertion opening 14, a dorsal hand portion 20 and a palmar hand portion 30, and furthermore a first distal tubular portion 40 comprising an exit opening at least for the index finger 42, a second distal tubular portion 50 comprising a thumb exit opening 52, a thumb-index notch portion 60 extending between said first and second distal tubular portions 40 and 50.

[0175] The thumb orthosis 10 further comprises a thin, reversibly foldable spacer member 70 extending, at least in part, along the thumb-index finger notch portion 60 and bearing against a lateral side 501 of the second distal tubular portion 50 and against a medial side 40m of the first distal tubular portion 40 so as to separate the thumb from the index finger.

[0176] Advantageously, in this specific example, the spacing member extends along the entire length of the thumb-index finger notch portion 60, i.e. from the thumb exit opening 52 to at least the index finger exit opening 42. Advantageously, the thumb orthosis has a general shape substantially like a mitten. Advantageously, the second distal tubular portion 50 receiving the thumb is arranged to receive the thumb, for example substantially up to mid-height of the thumb or at least so as to receive in its internal volume the proximal phalanx of the thumb and possibly extend to at least the distal phalanx of the thumb.

[0177] The thumb orthosis 10 further comprises a main return element 80, and comprising a first portion 82 and a second portion 84, in this specific example corresponding to the first and second ends of the main return element 80.

[0178] The main return element 80 extends from its first portion 82, in the palmar part of the hand 30, of the thumb-index notch portion 60, covering and surrounding at least in part the base of the thumb joint 16 and extends into the dorsal part of the hand 20 passing through the base of the thumb joint 16. Advantageously, the thumb orthosis 10 comprises a tightening strap 90 comprising a first portion 92 in connection with the second portion 84 of the main return element 80. The tightening strap 90 comprises a second gripping portion 94, advantageously free, comprising a first securing member 96, for example hooks. The thumb orthosis 10 comprises a second securing member 98 configured to cooperate for its removable securing with the first securing member 96 of the tightening strap 90. Advantageously, the second securing member 98 comprises self-gripping loops.

[0179] Advantageously, the first portion 92 of the tightening strap 90 is connected, in particular is secured for example by sewing, with the second portion 84 of the return element 80 in the dorsal part of the hand 20 of the textile tubular member 12, in particular in a wrist region adjacent to the introduction opening 14.

[0180] Advantageously, the tightening strap 90 extends from its first portion 92 in the dorsal part of the hand 20 of the textile tubular member 12, at least in part substantially surrounding the wrist, in a direction opposite to the second distal tubular part 50, in particular then extends onto the palmar part of the hand 30 returning towards the second distal tubular part 50.

[0181] Advantageously, the second securing member 98 is arranged in the palmar part of the hand 30 of the extensible textile tubular member 12, in particular at least partially covering the wrist.

[0182] Advantageously, the textile tubular member 12 comprises a lateral slot 18 (visible in FIG. 3) at least partially releasing the external side of the wrist, in particular arranged on the lateral side 121 of the textile tubular member 12, and separating a lateral portion 22 of the dorsal part of the hand 20 from a lateral portion 32 of the palmar part of the hand 30.

[0183] Advantageously, the textile tubular member 12 comprises a clamp 17 (visible in particular in FIG. 2) arranged in the dorsal part of the hand 20 and extending from the thumb-index finger notch portion, in particular partially running along the lower portion of the second distal tubular part 50, towards the main return element 80. This clamp 17 makes it possible to bring the thumb even further towards the dorsal face of the hand.

[0184] For example, the textile tubular member 12 is in a stretchable knit, for example an aerated mesh or an aerated tulle. Advantageously, the main return element 80 is a heat-sealing textile strip or two heat-sealing textile strips placed end to end. In this case, a heat-sealing textile strip comprising a textile strip with a polymeric coating or heat-activatable laminated strip, for example in a polyurethane or silicone elastomer. Advantageously, the main return element 80 is stretchable in that it accepts a longitudinal deformation of at least 40% with a residual deformation of at most 10% or 5%.

[0185] For example, the thumb-index finger spacer member 70 comprises several spacer pieces (not shown) secured to the inner face and to the outer face of the textile tubular member 12. For example, the spacer member 70 comprises 3 heat-sealing textile strips partially superimposed on each other and secured to the outer face of the textile tubular member 12, and two heat-sealing textile strips, in particular not superimposed, secured to the inner face of the tubular member 12. Alternatively, the spacer member 70 may comprise a spacer piece secured to the outer face of the textile tubular member 12 (for example having a heat-sealing strip having a thickness of approximately 0.5 mm). A heat-sealing textile strip is a textile strip comprising a polymeric coating or laminate strip that can be activated by heating (for example made of polyurethane or silicone).These heat-sealed textile strips stiffen the thumb-index finger notch portion but remain thin, and reversibly foldable so that the thumb-index finger pinching movement is maintained.

[0186] In operation, the user places his hand in the thumb orthosis 10, by inserting his hand through the insertion opening 14, then positions the thumb in the second distal tubular part 50 and the other four fingers of the hand in the first distal tubular part 40. The main return element 80 then exerts a return force from the thumb-index finger notch portion 60 on the palmar surface of the hand by surrounding the base of the thumb joint 16, and by pushing the thumb towards the dorsal surface of the hand via the main return element 80 extending on the dorsal part of the hand 20. Furthermore, the spacer member 70 also pushes the thumb away from the index finger, but does not prevent the pinching movement between the thumb and the index finger. ZI

[0187] The spreader member - being thin and substantially flat - is reversibly bendable so that it accompanies the pinching movement. With the thumb pushed towards the dorsal side, an analgesic position is sought.

[0188] The user then adjusts the return force of the thumb joint 16 towards the dorsal face by exerting tension on the second portion 94 of the tightening strap 90 and bringing it back towards the inner face of his wrist in order to exert a force seeking to always bring the thumb back into its neutral position. This tightening force is fixed by making the second securing member 98 cooperate with the first securing member 96 arranged on the second portion 94 of the tightening strap 90.

[0189] Advantageously, the slot 18 facilitates donning and makes it possible to avoid the formation of annoying folds at the wrist since the force exerted by the tightening strap 90 brings the lateral portions 22 and 32 more or less closer together. The textile tubular member 12 being extensible, it advantageously transmits the restoring forces exerted by the main restoring element 80 and by the tightening strap 90, and without attenuating them. The tubular member 12 being extensible applies a compressive force on the hand, and correlatively an analgesic effect.

[0190] Figure 9 shows a first example of a flat temporary textile tubular member 110 which can be used for making the thumb orthosis according to the invention, and for example for making the thumb orthosis 10. For reasons of simplification, the references of the thumb orthosis 10 are repeated for the temporary textile tubular member 110 when the parts concerned are similar. The temporary extensible textile member 110 comprises an upper edge 112, or upper border, and a lower edge 114, or lower border.

[0191] Advantageously, the temporary textile tubular member 110 comprises a through opening 115, in particular a slot 115 open on said upper edge 112, and extending substantially from the thumb-index finger notch portion 60 in the dorsal part of the hand 20 of the temporary extensible textile member 110 and in the direction of the lower edge 114 of said temporary extensible textile member 110.

[0192] Advantageously, the temporary textile tubular member 110 comprises a dorsal hand portion 20 delimited between an external edge A1, intended to come onto the lateral side 121 of the tubular member 12, an internal edge A7 forming an edge of the slot 15; an edge A2, and a portion of the upper edge 112, and of the lower edge 114.

[0193] Advantageously, the palmar portion of the hand 30 is delimited by a portion of the upper edge 112 and the lower edge 114, a lateral edge A6, intended to form the edge 121 of the tubular member 12, and a lateral edge A5. The second distal tubular portion 50 is flat before being shaped into a tube and therefore comprises the edges A3, A4, and a portion of the upper edge 112. The second edge A8 of the slot 115 is arranged in the dorsal portion of the hand 20.

[0194] Advantageously, the main return element 80 is secured, in particular heat-sealed, to the temporary tubular member 110. This main return element 80 may be in a form different from the strip form shown in FIGS. 1 to 8 and for example in the form of a part sized so as to cover the hatched area 120.

[0195] Furthermore, it is also possible to secure the first portion 92 of the tightening strap to the second portion 84 of the main return element 80 by placing the portion 92 under the second portion 84 if the latter is heat-sealed. The portions 84 and 92 are thus advantageously heat-compressed together with the temporary tubular member 110.

[0196] Advantageously, the shaping of the temporary tubular member comprises a step of closing the clamp 115 by joining and securing the edges A7 and A8 together. Then the edges A3 and A4 to form the second distal tubular part 30 are joined and secured together either directly or by means of one or more spacer piece(s) to form the thumb-index notch portion 60 the edges A2 and A5 are also joined and secured together to form the medial side of the first distal tubular part 40 and the edges A1 and A6 are joined and secured together to form the lateral side 121 of the tubular member 12. The order of securing the edges together may be different without departing from the scope of the invention. Preferably, the edges A1 to A8 are secured together by means of heat-sealing textile strips, in particular seamless. Alternatively, edges A1 to A8 can be joined together by sewing.The second example of thumb orthosis 200 (fig. 4-6) differs from the first example of thumb orthosis 10 in that the tightening strap 290 comprises a portion 292 of its length passing through a loop 293 comprising two through slots and forms a tightening loop. The tightening strap 290 thus comprises a second portion 295 over its length comprising a first securing member 296, here hooks, cooperating for its removable securing with loops 297 arranged on the inner face of the wrist as can be seen in figure 5.

[0197] The third example thumb orthosis 300 (FIGS. 7-8) differs from the first and second example thumb orthoses 10 and 200 in that it includes an auxiliary biasing member 385 extending into the dorsal hand portion 320 from the thumb-index finger notch portion 360 surrounding the base of the thumb joint and extending toward the primary extensible biasing member 380.

[0198] The orthosis 300 may also comprise a tightening strap as described in the present text, and for example arranged according to the tightening strap 90 or 290. The orthoses 200 and 300 may also comprise a lateral slit open on the wrist, such as the slit 18.

Claims

CLAIMS 1. Thumb orthosis (10,200,300), in particular for relieving and / or treating rhizarthrosis, characterized in that said orthosis (10,200,300) comprises an extensible textile tubular member (12) comprising: - a dorsal part of the hand (20) and a palmar part of the hand (30), and - a first distal tubular part (40) comprising an exit opening at least for the index finger (42), and - a second distal tubular portion (50) comprising a thumb outlet opening (52), - a thumb-index notch portion (60) extending between said first and second distal tubular parts (40,50), said orthosis (10,200,300) further comprises: - a thin, reversibly bendable spacer member (70) extending, at least in part, along the thumb-index finger notch portion (60) and bearing against a lateral side (501) of the second distal tubular portion (50) and against a medial side (40m) of the first distal tubular portion (40) so as to separate the thumb from the index finger; and - a main return element (80), comprising a first portion (82), and possibly a second portion (84), said main return element (80) extends from its first portion (82), arranged in the palmar part of the hand (30), from the thumb-index notch portion (60) by covering and surrounding at least in part the base of the thumb joint (16) and extends into the dorsal part of the hand (20) passing through the base of the thumb joint (16).

2. Orthosis (10,200,300) according to claim 1, characterized in that the main return element (80) comprises at least one polymeric layer having a determined part shape optionally combined with at least one textile layer having a determined part shape.

3. Orthosis (10,200,300) according to either of claims 1 and 2, characterized in that the spacer member is reversibly foldable in that it is possible to bring two portions of its length, which are spaced apart, closer together, in a first position, and to move said two portions apart so that they are not in contact in a second position, the passage from the first position to the second position, and vice versa, is obtained by the pinching movement between the thumb and the index finger.

4. Orthosis (10,200,300) according to any one of claims 1 to 3, characterized in that the orthosis (10,200,300) comprises a tightening strap (90,290) comprising a first portion (92,292) in connection with the second portion (84) of the main return element (80), in that said tightening strap (90,290) comprises a second gripping portion (94,295), possibly free, comprising a first securing member (96,296), and in that the orthosis (10,200,300) comprises a second securing member (98,297) configured to cooperate for its removable securing with the first securing member (96,296) of the tightening strap (90,290).

5. Orthosis (10,200,300) according to claim 4, characterized in that the first portion (92,292) of the tightening strap (90,290) is connected to the second portion (84) of the main return element (80) in the dorsal hand part (20) of the textile tubular member (12).

6. Orthosis (10,200,300) according to either of claims 4 and 5, characterized in that the tightening strap (90,290) extends from its first portion (92,292) in the dorsal hand portion (20) of the textile tubular member (12), at least in part substantially surrounding the wrist, in a direction opposite to the second distal tubular portion (50), in particular then extends towards the palmar hand portion (30) in the direction of the second distal tubular portion (50).

7. Orthosis (10,200,300) according to any one of claims 4 to 6, characterized in that the second securing member (98,297) is arranged in the palmar part of the hand (30) of the elastic textile tubular member (12), in particular covers at least part of the wrist.

8. Orthosis (10,200,300) according to any one of claims 1 to 7, characterized in that the textile tubular member (12) comprises a lateral slit (18) at least partially releasing the external side of the wrist, in particular arranged on the lateral side (121) of said textile tubular member (12), and separating a lateral portion (22) of the dorsal part of the hand (20) from a lateral portion (32) of the palmar part of the hand (30).

9. Orthosis (10,200,300) according to claim 8, characterized in that in a position in which the first and second securing members (96,296;297,98) cooperate together for their securing, the first portion (92,292) of the tightening strap (90,290) is connected to the lateral portion (22) of the dorsal part (20), and a portion (94,295) of the tightening strap (90,290), possibly the second portion (94,295) of the tightening strap (90,290), is connected to the lateral portion (32) of the palmar part (30).

10. Orthosis (10,200,300) according to any one of claims 1 to 9, characterized in that the spacer member (70) comprises one or more spacer piece(s) chosen from: a textile piece, a foam piece, a metal piece, a polymeric coating or laminate layer, or a combination of these.

11. Orthosis (10,200,300) according to any one of claims 1 to 10, characterized in that the spacer member (70) has a total thickness less than or equal to 10 mm, preferably less than or equal to 5 mm.

12. Orthosis (10,200,300) according to any one of claims 1 to 11, characterized in that the orthosis (10,200,300) comprises a sheath arranged in the thumb-index finger notch portion (60) configured to receive said spacer member (70), preferably said spacer member is arranged removably in the sheath.

13. Orthosis (10,200,300) according to any one of claims 1 to 11, characterized in that the spacer member (70) comprises at least one spacer piece arranged, in particular secured, to the external face of the thumb-index notch portion (60), and / or at least one spacer piece arranged, in particular secured, to the internal face of the thumb-index notch portion (60).

14. Orthosis (300) according to any one of claims 1 to 13, characterized in that the orthosis (300) comprises an auxiliary return element (385) comprising a first portion extending in the dorsal part of the hand (320) from the thumb-index notch portion (360) by covering and surrounding at least in part the base of the thumb joint and extends in the dorsal part of the hand (320) as far as the main return element (380).

15. Orthosis (10,200,300) according to any one of claims 1 to 14, characterized in that the main return element (80) is chosen from: - a part comprising a textile part, a part in a polymeric layer, or a combination of the latter, or several of said parts in the extension of each other; and / or - at least one textile portion of the textile tubular member (12) comprising one or more elastic thread(s), in particular woven thread(s).

16. Orthosis (10,200,300) according to any one of claims 1 to 15, characterized in that the textile tubular member (12) comprises a clamp (115) arranged in the dorsal part of the hand (20) and extending from the notch portion thumb-index (60) towards a hand insertion opening (14), or towards a lower edge (114) of the tubular member (12).

17. Method for manufacturing a thumb orthosis (10,200,300), in particular according to any one of claims 1 to 16, in particular for relieving and / or treating rhizarthrosis, comprising the steps: - a) providing a substantially planar temporary extensible textile member (110) having a determined configuration, a thin and reversibly foldable spacer member (70), and a main return element (80, 380) comprising a first portion (82) and a second portion (84); - b) shaping the temporary extensible textile member (110) in three dimensions so as to form a tubular textile member (12) comprising a dorsal hand portion (20, 320) and a palmar hand portion (30), and - a first distal tubular part (40) comprising an exit opening at least for the index finger (42), and - a second distal tubular portion (50) comprising a thumb outlet opening (52), - a thumb-index finger notch portion (60) extending between said first and second distal tubular parts (40, 50), - arranging the spacer member (70) in the thumb-index finger notch portion (60) during step b), or after step b), so that said spacer member (70) comes to bear against a lateral side (501) of the second distal tubular part (50) and against a medial side (40m) of the first distal tubular part (40) in order to separate the thumb from the index finger; and in that the main return element (80,380) is integrated into, or secured to, the temporary extensible textile member (110) or to the extensible tubular member (12) so that said main return element (80,380) extends from its first portion (82), in the palmar part of the hand (30), of the thumb-index notch portion (60) by covering and surrounding at least in part the base of the thumb joint (16) and extends into the dorsal part of the hand (30) passing through the base of the thumb joint (16).

18. A method of manufacturing a thumb orthosis (10,200,300) according to claim 17, characterized in that the temporary extensible textile member (110) comprises an upper edge (112) and a lower edge (114), and in that the temporary extensible textile member (110) comprises a through opening (115), in particular an open slit (115) on said upper edge (112), extending substantially from the thumb-index finger notch portion (60) in the dorsal hand portion (20,320) of the temporary extensible textile member (110) and towards the lower edge (114) of said temporary extensible textile member (110).

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