Surgery: splint – brace – or bandage – Orthopedic bandage – Splint or brace
Patent
1992-02-11
1994-08-30
Brown, Michael A.
Surgery: splint, brace, or bandage
Orthopedic bandage
Splint or brace
128 991, 1281061, A61F 500, A61F 524, A61F 528
Patent
active
053422899
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
Technical Field: The invention relates to an improved hyperextension orthesis, especially one in which the distance of the sternal pad from the base plate adapts automatically to different body postures during wearing.
In all known three-point support corsets after Bahler, so-called hyperextension ortheses, the pads are rigidly arranged. The distance of the pads from the base plate is adjusted by shortening the chest and abdominal rods upon adaptation by the orthopedic specialist. In the case of elderly patients there are difficulties, caused by incorrect posture and when sitting, to the extent that the sternal pad is pushed upwards as a result of the altered body posture and presses on the windpipe and leaves behind chafe marks.
The report by the company Otto Bock: "Hyperextensionsorthese in Modulbauweise" [Hyperextension orthesis in modular design] in Medizinisch-Orthopadische Technik, Volume 5, 1987 and Reissue U.S. Pat. No. 31,564 disclose hyperextension ortheses of the generic type which, with the aid of oblong holes, permit a simple adaptation of the position of sternal pad and symphysis pad to the body size of the patient. However, only one single adaptation is possible in this way. The real problem of a dynamic adaptation of the position of the sternal pad to the respective body posture of the patient is consequently not solved.
SUMMARY OF THE INVENTION
The aim of the present invention is therefore to provide a constructional design of a hyperextension orthesis which overcomes these disadvantages and which also ensures the correct positioning of the sternal pad in the event of a varying body posture of the wearer.
This objective is achieved by means of a hyperextension orthesis with a base plate, an abdominal rod extending downwards therefrom with a symphysis pad, branches extending to both sides with locking elements, and an upwardly extending chest rod at whose end an oblong hole is provided for engagement of a screw for securing a sternal pad. The characterizing feature of the construction according to the invention consists in the fact that the sternal pad has a groove for receiving the chest rod, and an elongate tongue extending out from the lower end of the pad for movable engagement in a slide sleeve formed in [sic] on the chest rod at a distance from the oblong hole.
The screw for securing the sternal pad is chosen in such a way that the screw head bears securely only on the chest rod, so that a sliding in the oblong hole is readily possible.
The groove for receiving the chest rod is preferably formed on the side of the sternal pad directed away from the body, and the slide sleeve is preferably arranged on the side of the chest rod directed toward the body. Upon initial adjustment of the hyperextension orthesis, the length of the chest rod is chosen such that the hyperextension orthesis bears upon the correct body site. If the distance between the sternal pad and the base plate is now shortened as a result of a change of body posture, the tongue or the slide pushes deeper into the slide sleeve of the chest rod, as a result of the secure positioning of the sternal pad on the body, so that the upward pushing of the sternal pad and the pressure on the windpipe do not occur. If the body posture leads to an increased distance between the sternal pad and the base plate, the slide slips slightly further out of the slide sleeve. This constructional design of a movable slide adapts the distance between sternal pad and base plate automatically to the body posture, the pressure of the sternal pad upon the body remaining basically constant. The relief of the vertebral bodies of the lumbar spine and thoracic spine achieved by the corset is likewise maintained constant.
The slide sleeve can be made of plastic or metal. Suitable plastics are thermo plastics with good surface properties, such as polyamide, polyolefins, polyurethanes, polycarbonate. Homopolymers are suitable as well as copolymers.
The slide sleeve preferably has a U-shaped cross-section, so that between the c
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patent: 5086757 (1992-02-01), Lestini
patent: 5135471 (1992-08-01), Houswerth
patent: 5176622 (1993-01-01), Anderson
Journal Medizinisch-Orthopadische Technik, 1987, pp. 711-712, "Otto Bock Hyperextensionsorthese in Modularbauweise".
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