extendable child prosthesis

Abstract

The invention discloses an extendable prosthesis for children. The extendable prosthesis comprises a jacket, an inner core, a plurality of unidirectional buckle assemblies, a plurality of bidirectional buckle assemblies and a sealing ring. A slide hole is formed in the jacket, an opening is formed in the bottom of the slide hole, the inner core is slidably arranged in the slide hole of the jacket and is in close fit with the slide hole of the jacket, stepped clamp sections are arranged at the lower end of the slide hole, a liquid injection hole which is communicated with the slide hole is formed in the jacket, all the unidirectional buckle assemblies are equidistantly mounted on the left and right side walls of the inner core, all the bidirectional buckle assemblies are equidistantly mounted on the front and rear walls of the inner core, and the sealing ring is arranged at the end of the top of the inner core. The extendable prosthesis has the advantages that the unidirectional buckle assemblies are matched with the clamp sections of the slide hole, so that the inner core can downwardly slide relative to the jacket without upwardly sliding; upper and lower positioning grooves are formed in the slide hole, smooth oblique planes are respectively arranged on two side surfaces of each positioning groove, the positioning grooves are matched with the bidirectional buckle assemblies, and accordingly the problem that an existing inner core downwardly slides relative to an existing jacket to automatically fall off without external force or under the effect of low external force can be solved.

Description

technical field [0001] The invention relates to a prosthesis used in limb salvage surgery for malignant bone tumors in children, in particular to an extendable children's prosthesis with simple structure, convenient extension operation and effective avoidance of secondary surgical trauma. Background technique [0002] For patients with limb tumors, after surgery, the diseased side needs to be implanted with a prosthesis, and the growth rate of the healthy side is faster than that of the side implanted with the prosthesis, which leads to the opposite side of the artificial joint prosthesis. The short length makes the patient unable to walk or exercise normally, and can only wait for a certain period of time before implanting another pair of lengthened artificial joint prosthesis. If the patient is a child, with the growth and development of the body, a new artificial joint should be replaced at any time. Generally, there are only two ways to extend the child's prosthesis. Th...

AI Technical Summary

Problems solved by technology

[0002] For patients with limb tumors, after surgery, the diseased side needs to be implanted with a prosthesis, and the growth rate of the healthy side is faster than that of the side implanted with the prosthesis, which leads to the opposite side of the artificial joint prosthesis. Shorter, so that the patient cannot walk or exercise normally, and can only wait for a certain period of time to implant another pair of lengthened artificial joint prosthesis

If the patient is a child, with the growth and development of the body, a new artificial joint should be replaced at any time. Generally, there are only two ways to extend the child's prosthesis. The extension of the length is also designed based on the principle of cooperation between the screw and the screw hole, but it fixes a magnetic piece on the screw or the screw hole, and uses magnetic adsorption as the driving force. The length of the bone, but the patient needs to undergo periodic (6 months or 1 year) painful secondary surgical trauma; although the latter does not require secondary surgical trauma, the magnetic parts are easily affected by the external environment (magnetic field), Very prone to accidents, affecting the daily life of patients, the design is not humane enough

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