Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/22—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration
  • D04B1/24—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration wearing apparel
  • D04B1/26—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration wearing apparel stockings
  • D04B1/265—Surgical stockings
• • 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
  • A61F13/00—Bandages or dressings; Absorbent pads
  • A61F13/06—Bandages or dressings; Absorbent pads specially adapted for feet or legs; Corn-pads; Corn-rings
  • A61F13/08—Elastic stockings; for contracting aneurisms

Definitions

• the invention relates to compression orthoses of the lower limbs, generally known by the name "low compression / compression”, which are indicated in the various symptomatologies of venous insufficiency of the lower limbs.
• low compression / compression the various symptomatologies of venous insufficiency of the lower limbs.
• the invention is however not limited to a particular type of article, but applies equally well to all forms of compressive orthoses of one or both lower limbs, whether they are tights, pantyhose, stockings or socks.
• These orthoses are designed to produce a therapeutic effect by compression of the lower limb over a greater or lesser extent covering at least the calf region. This compression also has a decreasing compression profile upwards from the ankle.
• these orthoses differ in particular from the stockings or socks proposed by US-A-6,216,495 (Couzan et al.), which are not intended to treat a pathology such as chronic venous insufficiency. (IVC) but have a pressure gradient along the leg adapted to the physiology of athletes, with pressure exerted on the foot region and malleolus that is lower than the pressure in the calf area, and pressure on the calf that is "degressive downwards", that is to say with an inverse profile of the usual profile of stockings for therapeutic purposes for the treatment of venous insufficiency.
• IVC chronic venous insufficiency
• Compression / compression orthoses for therapeutic purposes are divided according to the ASQUAL standard into four compression / compression classes, namely class I (13 to 20 hPa ⁇ 10 to 15 mmHg at the ankle), class II (20 at 27 hPa ⁇ 15 to 20 mmHg), class III (27 to 48 hPa ⁇ 20 to 36 mmHg) and class IV (> 48 hPa ⁇ > 36 mmHg).
• class I 13 to 20 hPa ⁇ 10 to 15 mmHg at the ankle
• class II (20 at 27 hPa ⁇ 15 to 20 mmHg
• class III 27 to 48 hPa ⁇ 20 to 36 mmHg
• class IV > 48 hPa ⁇ > 36 mmHg.
• muscular pump or “muscular-aponeurotic pump of the calf”
• muscular and deep venous, chronic venous insufficiency being characterized by a failure of this muscular pump effect.
• EP-A-1 240 880 proposes for this purpose a compression orthosis comprising in the region of the calf a zone having a non-uniform relative elasticity along a contour at a given altitude, in particular with a zone of elasticity.
• locally weak or nil that is to say less deformable or non-deformable
• the goal is to exercise compression at the calf mainly where it is effective, that is to say on the posterior side, and not uniformly in all directions of a horizontal plane.
• the orthosis comprises, on the posterior surface in the region of the calf, a zone comprising a greater length of elastic thread, hence locally more deformable, making it possible to compensate for the higher deformation resulting from the volume of the calf which otherwise would have caused this place an extra pressure of contention.
• One of the aims of the invention is to propose a means for improving the performance of the musculo-aponeurotic calf pump in chronic venous insufficiency pathologies, thanks to an orthosis compressive better suited to this role than the orthoses that have been proposed so far.
• the starting point of the invention lies in the observation that it has not been demonstrated that, in the case of a minor or moderate chronic venous insufficiency without trophic disorders, one needs to exercise at the ankle external pressure, except to respect the "principle" of degressivity.
• the invention provides an orthosis of the general type disclosed in particular by the aforementioned US-A-3,386,270 (Simmons), that is to say a compressive orthosis of the lower limb in the form of a knitted article of low type, sock or adhesive, having a leg portion extending upwardly from the ankle, this leg portion being a compressive portion whose mesh structure and sizing are chosen to: apply to a compression region of the leg between the ankle and the knee, a therapeutic compressive pressure once the orbit is slipped over the limb; and ensuring a homogeneous distribution of the elastic return forces on the circumference of the orthosis along a contour corresponding to a horizontal section of the member.
• the mesh structure and the dimensioning of the leg portion are chosen so that, in addition, once the orthosis is threaded onto the member, the average pressure Pc exerted on the central third of said compression region is greater than both the average pressure Pb exerted on the distal third of the compression region and the average pressure Pd exerted on the proximal third of the compression region. compression region.
• the mean pressure is the average of the compression pressures locally exerted along a contour at a given limb elevation, and Pc, Pb and Pd are the pressures exerted at the elevations of the respective points c, b and d of the Hohenstein model.
• the orthosis of the invention makes it possible in particular to exert the compression mainly at the level where it is effective, that is to say at the level of the calf, and not degressively with a maximum pressure at the ankle.
• both for the comfort of the patient and for the therapeutic effectiveness of the orthosis it is advisable to avoid below the knee any effect of a boy that would upset the improvement of the muscular pump effect.
• the orthosis that has just been exposed is perfectly adapted to an indication of minor or moderate chronic venous insufficiency, without trophic disorder.
• the mesh structure and the dimensioning of the leg portion can be chosen so that:
• the average pressure Pc exerted on the central third is between 1.5 and 2.5 times the average pressure Pb exerted on the distal third;
• the average pressure Pd exerted on the proximal third is less than the average pressure Pb exerted on the distal third; the average pressure Pc is greater than or equal to 20 mmHg;
• the average pressure Pd is less than 15 mmHg.
• the single appended FIGURE illustrates a series of pressure profiles, respectively for conventional compression stockings of classes I to III and for the bottom of the invention, with the different levels of the jamle at which the pressure pressures are measured. compression applied.
• the orthosis of the invention is a sock-like, low or glue-like orthosis comprising a leg portion extending upwardly from the ankle, and including this area.
• the leg part is a compressive part whose mesh structure and sizing are chosen so as to apply a compressive pressure on the leg once the orthosis is threaded onto the limb.
• the mesh may be of the same type as that of conventional compression / compression stockings, for example of the screen type, jersey, pinched or floated micromesh, etc., all knits known in themselves from the knitting techniques specialist.
• the yarn chosen for the knitting of this orthosis may be an elastane not gimped or gimped cotton and polyamide, a cotton-filled elastane guiges polyamide, or a mixture of elastane and elasto-diene ( synthetic rubber latex).
• the tensioned textile exerts a compression resulting from the restoring force of the elastic fibers which make up the material.
• threading on the limb produces a higher restoring force, thus a greater compression manifesting locally by a normal component of higher pressure exerted on the limb surface.
• the choice of mesh and yarns, as well as the sizing of the different rows of mesh are defined so as to apply predetermined pressures at different altitudes of the leg, for example at the height of the ankle, from the calf, to the calf level, popliteal fossa, etc. up to the thigh in the case of a thigh-high or pantyhose.
• These different pressures are defined for each contention / compression class with reference to metrological templates such as the Hohenstein model.
• the structure of the mesh row provides a homogeneous distribution of the elastic return forces on the bottom circumference, that is to say along a contour corresponding to a horizontal section of the member.
• FIG. 1 shows the average pressure values recorded at the various heights of the leg as defined by thecorenstein reference leg model, namely:
• the pressure exerted at the height of point b of the Hohenstein model is the pressure prescribed for the chosen compression / compression class (I, II , III or IV) this pressure corresponding moreover to the pressure value (theoretically) the highest exerted on the member.
• the characteristic illustrates the pressure profile recorded for orthoses of class I (profile A1), class II (profile A2) and class III (profile A3), and for an orthosis according to the invention (profile I ).
• the pressures exerted on the foot that is to say for altitudes less than 12 cm, are not considered significant in the context of the disclosure of the present invention, which concerns only the pressure profile exerted on the limb from the ankle and above.
• the invention proposes a new pressure profile which, instead of being decreasing from the ankle, is instead first progressive to the calf, then decreasing above the calf towards the knee.
• the region R on which the compression is applied extends from the point b (ankle) to the point e (below the knee), and comprises a distal third RD, a central third RC and a proximal third RP (the "thirds" are not necessarily of equal extent, but corresponding to three successive zones of the region R).
• the bottom is designed to exert maximum compression either at the ankle level in the distal region RD, but in the central region RC at the calf level.
• the pressure in the proximal region RP is also a reduced pressure, so as to deliver in this region a pressure close to that of a non-medical textile, for example between 5 and 10 mmHg , simply allowing a good holding of the orthosis but introducing no discomfort for the patient, including no tourniquet effect at this level.
• the mesh structure and the dimensioning of the leg portion can be chosen in such a way that, once the orthosis is threaded onto the limb, the average pressure at point c is between 1.5 and 2.5 times the average pressure. exerted at point b, the average pressure at point c being preferably greater than or equal to 20 mmHg and that at the point d less than 15 mmHg.

Landscapes

• Health & Medical Sciences (AREA)
• Engineering & Computer Science (AREA)
• Animal Behavior & Ethology (AREA)
• Heart & Thoracic Surgery (AREA)
• Vascular Medicine (AREA)
• Life Sciences & Earth Sciences (AREA)
• Biomedical Technology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Textile Engineering (AREA)
• Socks And Pantyhose (AREA)
• Orthopedics, Nursing, And Contraception (AREA)
• Professional, Industrial, Or Sporting Protective Garments (AREA)

Applications Claiming Priority (2)

Publications (1)

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Country Status (11)

Families Citing this family (16)

Citations (1)

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• 2005
  • 2005-06-16 FR FR0506107A patent/FR2887141B1/fr not_active Expired - Fee Related
• 2006
  • 2006-06-07 KR KR1020087001208A patent/KR20080036581A/ko not_active Application Discontinuation
  • 2006-06-07 WO PCT/FR2006/001284 patent/WO2006134250A2/fr active Application Filing
  • 2006-06-07 CN CNA2006800266206A patent/CN101227877A/zh active Pending
  • 2006-06-07 JP JP2008516368A patent/JP2008543404A/ja active Pending
  • 2006-06-07 BR BRPI0613716-4A patent/BRPI0613716A2/pt not_active IP Right Cessation
  • 2006-06-07 EA EA200800063A patent/EA200800063A1/ru unknown
  • 2006-06-07 AU AU2006258936A patent/AU2006258936A1/en not_active Abandoned
  • 2006-06-07 EP EP06764744A patent/EP1922041A2/fr not_active Withdrawn
  • 2006-06-07 CA CA002612210A patent/CA2612210A1/fr not_active Abandoned
  • 2006-06-07 US US11/922,347 patent/US20090240279A1/en not_active Abandoned

Patent Citations (1)

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