ES2912361A1 - Space -turn joint for sternal support for hyperextension frames (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Space -turn joint for sternal support for hyperextension frames. The invention focuses on the articulated structure that links the sternal and frontal plates of a hyperextension brand. It is an articulation that is applied in the middle zone between both plates, allowing greater relative mobility between parts and greater adaptability. The articulation is based on two mechanized pieces (16-18) that are linked respectively to one and another plate, and that among them are linked by means of spherical cranks (4) that play in seats of one of the mechanized pieces and are They screw the other, seats that allow the basket of the connecting rods and their axial displacement against the tension of a spring (17), leaving the mechanism covered by a foam case (25). The spring maintains a constant pressure between plates, accompanying the anatomy and movement of the patient softly and uniformly in all directions. (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPTION

Spatial twist joint for sternal support for hyperextension frames

TECHNICAL SECTOR

The present invention relates to a spatial joint, inserted between the sternal plate and the front plate of a hyperextension frame, of the type intended to immobilize the patient in the area of the trunk, joint that allows a perfect adaptation to the patient's sternum of the sternal plate regardless of its morphology.

Consequently, the object of the invention is to achieve a device with a higher degree of adaptability than devices of this type existing to date.

BACKGROUND OF THE INVENTION

Currently, hyperextension frames or also called Jewett frames, are used to immobilize the vertebral column of a patient, usually after undergoing spinal surgery, suffering from osteoporosis, an accident, etc.

The hyperextension frames work through three support points, a sternal support, a suprapubic support and a thoracolumbar support.

The sternal support has a regulation system that improves contact on the patient's chest to avoid injuries, discomfort and damage caused by the pressure exerted by the sternal plate.

Currently, regulation systems for sternal support do not offer really effective solutions and have the drawback that certain comfort limitations exist in said solutions, either due to their hardness in the rotation of the sternal plate, lack of adaptation to the different morphologies of the patients, little mobility of the plate and/or its rigidity, thus preventing a perfect adaptation.

In this sense, patent WO 2018109254 can be cited, which describes a sternal support for hyperextension frames that comprises a support in combination with a front plate and some damping elements that maintain a separation distance between the support and the front plate.

The support and the front plate are joined together by means of fixing devices that include central parts housed within coaxial holes of the damping elements, so that the front plate has an adjustment in three directions of space substantially perpendicular to each other. .

Thus, in this solution two support points are provided, one on each side of the sternal plate of the frame, which means that the movement of the sternal plate and therefore its adaptation to the morphology of the patient is sensibly limited. being linked at two sensibly distant points.

Furthermore, this mechanism is covered by a silicone shock-absorbing element that, although it can be slightly deformed, as is evident, offers resistance to said deformation, which limits the degree of adaptability of the assembly.

EXPLANATION OF THE INVENTION

The spatial swivel joint for sternal support for hyperextension frames that is recommended resolves the aforementioned problem in a fully satisfactory manner, offering a greater degree of adaptability than the previously mentioned devices.

For this, the invention proposes a joint that allows a spatial rotation that is mounted between the sternal plate and the frontal plate, allowing a total tilt in any direction, thus ensuring a correct adaptation of the plate to the patient's sternum, whatever its morphology. .

More specifically, the articulation is applied punctually in the intermediate area between the sternal plate and the frontal plate, preventing the medial lateral rotation of the sternal plate through the two ball joints or spherical connecting rods that the mechanism contains and that allow tilting. in its space. This mechanism is made up of a spring, two ball joints or spherical connecting rods and two machined parts that fit on one side to the sternal plate and on the other to the front plate, by means of screws, the assembly being protected by a foam bushing.

The sternal plate has some holes that serve to fix it by means of two screws to the spatial rotation joint that is the object of the invention.

For its part, the front plate has some slots in the vertical-longitudinal direction where two other screws are inserted that serve to link said front plate to the spatial rotation joint that in turn is already attached to the sternal plate.

These slots provide a better fit of the sternal plate on the patient, as they allow its height to be adjusted.

The machined parts that form part of the joint are linked to each other through the spherical connecting rods that adopt a parallel and horizontal arrangement, and that are screwed by their threaded rear end to the machined part linked to the sternal plate, while their another end, ending in a ball joint, plays articulately within a seat provided in the machined part that is linked to the front plate.

Said seat allows an axial play of the spherical connecting rods as well as their tilting, a play that is opposed by the aforementioned spring, which confers sufficient elasticity to allow a constant and stable adjustment between the patient and the chest plate.

The spherical connecting rods allow the necessary play so that the entire assembly can tilt freely, except for the axial rotation of the chest plate, which is prevented by the double play of the spherical connecting rods, in order to ensure that the plate fits perfectly to the patient while maintaining the its correct horizontal position at all times.

DESCRIPTION OF THE DRAWINGS

To complement the description that is going to be made below and in order to help a better understanding of the characteristics of the invention, according to a preferred example of its practical embodiment, a set of plans is attached as an integral part of said description. where with an illustrative and non-limiting nature, it has been represented the following:

Figure 1.- Shows a perspective view of a hyperextension frame that includes a spatial rotation joint for the sternal plate made in accordance with the object of the present invention.

Figure 2.- Shows an exploded view of the spatial rotation joint that participates in the device of the previous figure, being able to observe how it is related to the sternal plate and to the frontal plate.

Figure 3.- Shows a sectional view of the spatial rotation joint joined to the chest and front plates, according to section line A-A of figure 2.

Figure 4.- Shows, finally, a sectional view of the spatial rotation joint joined to the chest and front plates, according to the section line B-B of figure 2.

PREFERRED EMBODIMENT OF THE INVENTION

In view of the figures outlined, and especially of figure 1, it can be seen how the device of the invention is intended to be implanted in a hyperextension frame, in which several structural elements participate whose purpose is the immobility of the patient in the trunk area.

The frame is made up of a series of bars that allow it to be adapted to the patient by means of sliders (3) made on the bars and fixed with screws (7). This orthosis works with the support system at three points: A sternal plate (1), an iliac crest support (9) and a lumbar plate (15).

These supports are connected to each other by lateral bars (10) that descend laterally along the midaxillary line.

The hyperextension frame has different height and width adjustments because its pelvic band (8) is also adjustable to be able to adapt correctly to the patient's body, minimizing the number of sizes.

The function of the sternal plate (1) is of vital importance in the adaptation, adjustment and comfort of the patient. This plate is attached to the frame structure and to the front plate (2) by means of a mobile system that allows the hyperextension frame to be adapted to the patient.

Well, according to the invention, the recommended joint consists of a pair of machined parts (16) and (18), which fit on one side to the sternal plate (1) and on the other to the front plate (2), by means of screws (20-11), including the sternal plate (1) a pair of horizontally aligned holes through which the screws (20) pass and thread on the machined part (18), while the plate The front part (2) includes a pair of vertically aligned vertical slots through which the screws (11) pass with the interposition of the complementary washers (12), screws that in turn thread into the machined part (16), so that these pieces, which during assembly are facing each other and slightly distanced, are linked to each other through spherical connecting rods (14), materialized in bolts that at one of their ends thread on respective holes provided in the machined part (18), while their other ends, finished in a ball joint, play in seats provided in the opposite machined part (16), adopting a parallel and horizontal arrangement, and these seats presenting sufficient space to allow not only the tilting of the spherical connecting rods (14) within it, but also a axial displacement, against the tension of a spring or spring (17) that is interposed between said machined parts (16-18), leaving the assembly covered by a foam cover (25).

Based on this structure, and as previously mentioned, the play of the screws (11) in the vertical slots of the front plate (2) allow the relative adjustment of this piece with respect to the sternal plate, while that the parallel and horizontal arrangement of the spherical connecting rods (14) prevents their rotation in the frontal plane, allowing the rest of the displacements and tilts, which significantly increases the degree of adaptability of the sternal plate to the patient.

Claims (3)

1a.- Spatial rotation joint for sternal support for hyperextension frames, frames of the type that define a three-point support system; a sternal plate (1), an iliac crest support (9) and a lumbar plate (15), where the sternal plate (1) is attached to the frame structure and to a frontal plate (2) by means of a mobile system that allows adaptation to the patient of the hyperextension frame, characterized in that it is constituted from a pair of machined parts (16) and (18), which are respectively linked to the front plate (2) and to the sternal plate (1), using screws (11-20), including the sternal plate (1) a pair of horizontally aligned holes through which the screws (20) pass and thread on the machined part (18), while the front plate (2) includes a pair of vertically aligned vertical slots through which the screws (11) pass, screws that in turn thread into the machined part (16), having foreseen that the machined parts (18-16) are linked to each other through of spherical connecting rods (14), materialized in bolts that by one of their ext Oars thread on respective holes provided in the machined part (18), while their other ends are finished off in respective ball joints that play in seats provided in the opposite machined part (16), adopting a parallel and horizontal arrangement, and presenting said seats a space to allow both the tilting of the spherical connecting rods (14) and their axial displacement within said seat, against the tension of a spring or spring (17) that is interposed between said machined parts (16-18), with the particularity that the whole is covered by a cover that allows the perfect movement of the spatial articulation. 2a.- Spatial rotation joint for sternal support for hyperextension frames, according to claim 1a, characterized in that the screws (11) that play in the vertical and vertically aligned slots of the front plate (2) are complemented with washers (12) . 3.- Spatial rotation joint for sternal support for hyperextension frames, according to claim 1, characterized in that the cover that covers the joint is made of foam.