FR2751205A1 - Orthopaedic lumbar corset - Google Patents

Abstract

The corset comprises two central half arms (1) which support on the interior of the iliac ridges by the centre of pressure of the ridges (7) and on the base of the rib cage. This is at an open angle of 17 deg \!3 deg with respect to the median axis and over a distance from a posterior-lateral zone (10) up to the anterior area over a minimum height of 10 cm. The corset may comprise an integral spider-shaped flexible structure, having six arms (1-3) of different widths and horizontal orientation. The arms form a rear casing (4) between them which allows deformation in all directions and connects the anterior adjacent edges by adjustment straps (6-12).

Description

TECHNICAL AREA: Orthopedic appliances
STATE OF THE PRIOR ART:
The state of the art currently used does not make it possible to obtain a reduction in disc pressure, and limits without control the amplitude of the joint by the use of different materials and more or less rigid assemblies.

The flexibility of current corsets is sanSrapport with the physiological joints of the human body.

PRESENTATION OF THE INVENTION: It is proposed in order to obtain a reduction in the pressure from the top to the bottom exerted on the discs and a control of the articular amplitude in relation to the physiological articulations the following solutions: * Two semi-arms right and left circulars rigidified posteriorly and connected to each other anteriorly by an adjustment strap. These two arms extend in height, from the iliac crests to the top of the lower third of the rib cage. They take support on the iliac crests and against support on the rib cage which forms an open angle upwards of 17 + or - 3.

The convergence towards the other of these two arms pushes up the rib cage which makes it possible to relieve the disc pressures of the vertebrae located between the pelvis and the rib cage, namely, the 1st, 2nd, 3rd, 4th , and 5th lumbar vertebrae.

* Four right and left semi-circular arms rigidified posteriorly and connected to each other anteriorly by an adjustment strap. Two of them are located in the pelvis and the other two in the central third of the rib cage.

They are interconnected posteriorly by the rigid material called the posterior stent area which extends from D8 to the gluteal region over a vertical width of at least 10 cm. Vertical central windows are located so that at any point on 25 cm flexibility is possible in order to be in relation to the multiple joints of the spine.

The subject is pressed against the area known as the posterior stakes by the 6 arms. The reference curvature of the posterior zone is related to the physiological curvature of a standing subject in natural lordosis.

The assembly can deform while wishing to return to its reference curvature.

In this way, the articular amplitude is progressively limited, therefore in a controlled manner and in similarity to the physiological joints.

STRUCTURE:
The corset consists of a single-piece structure made of semi-rigid polyethylene 2 to 3 mm thick. It presents itself as an octopus provided with 6 arms (1-2-3) more or less wide and horizontal forming a body between them posteriorly by a zone known as the posterior stakes (4).

The entire structure as well as the areas devoid of plastic are internally provided with a polyethylene foam about 5mm thick (5).

An additional upholstery called crest support (7) is included between the polyethylene foam and the plastic symmetrically with respect to the median axis. These crest supports are positioned against the lower edges of the central arms according to the markings delimited at these locations (13).

They are banana-shaped, about 14 cm long and 3 cm wide. The thickness of 7 mm is chamfered around the edge, on one side.

3 straps (6-12) tightening by self-gripping fabric are positioned in front and horizontally to connect each pair of horizontal arms.

An inner lug (8) forms a bridge between the adjacent right and left front edges.

The straps and the sub tab are fixed to the general structure by tubular rivets (9).

OPERATION:
Each pair of arms (1-2-3) converges towards each other from outside to inside thanks to the flexibility of the materials at a location which is postero-laterally to the right and to the left about 10 cm from the processes. prickles (10) along a vertical axis.

The adjustment from the outside to the inside is done by means of the front hook-and-loop straps (6-12) which bring the adjacent edges together. The straps also serve as an integral closure after the corset is put on the subject.

The progressive tightening allows to embrace in a controlled way.

The area known as the posterior stakes (4) has a vertical curvature strictly identical to the physiological curvature of the standing subject in natural lordosis. This area is flexible due to the qualities specific to the polyethylene used. It is approximately 10 cm wide and has two vertical central windows (11) so that at any point over 25 cm, the plastic can deform in a horizontal direction.

The separation from top to bottom of each right and left hemi-arm (1-2-3) over a distance from a posterolateral area to the anterior medium allows anteflexion, extension, rotation, inclination lateral and rhythmic elevation of the pelvis when walking.

The junction of said right and left half-arms by the stretch and retractable foam (5) as well as the posterior zone (4) allowing the 6 arms to become one with one another makes it possible to progressively limit the amplitude therefore in a controlled manner the movements of anteflection, extension, rotation, lateral inclination and rhythmic elevation of the pelvis when walking.

The two central hemi-arms (1) extend in height from the iliac crests to the top of the lower third of the rib cage. In the lower part they rest on the inside of the iliac crests by means of crest supports (7), and in the upper part on the bottom of the rib cage at an open angle to the vertical median axis of 17 + or - 3 "allowing an orientation upwards.

The bringing together towards the other of the outside towards the inside of these two central hemi-arms makes it possible to push up the rib cage. Adjustment and control are carried out via the anterior strap (12).

INDUSTRIAL APPLICATION:
This type of orthopedic appliance is made from a single flat model according to the dimensions of the drawing Fig 4
The model thus defined is adapted by thermoforming on a positive representing the morphology of the subject. Thermoforming is facilitated by the use of an anterior placement template in order to allow the juxtaposition of each pair of arms. That said, a slight offset of 5 to 6 mm maximum does not affect efficiency in any way.

Claims (4)

1. Lumbar orthopedic corset to control the disc pressure and the articular amplitudes characterized by two large central half-arms (1) bearing on the inside of the iliac crests via the crest supports (7) and on the bottom of the rib cage at an open angle of 17 + or - 3 relative to the median axis and over a distance from a posterolateral zone (10) to the anterior medium over a minimum height of 10 cm. 2. Orthopedic corset according to claim 1 characterized by a flexible structure in one piece in the shape of an octopus provided with 6 arms (1-2-3) of different widths and degrees of horizontality forming a body between them later (4) allowing deformation in all directions, and joining the adjacent front edges by adjustment straps (6-12). 3. Orthopedic corset according to any one of claims 1 and 2 characterized by a limitation of the deformation thanks to the semi-rigid posterior zone (4) and the connection between the arms by a stretchable and retractable foam (5). 4. Orthopedic corset according to any one of claims 1 to 3. Characterized by a posterior zone called the posterior tutor (4) having vertical central windows (11) located so that at any point on 25 cm in height the flexibility is possible in order to be related to the multiple joints of the spine.