Title:
MINIMALLY INVASIVE MINIMAL STRESS SHIELDING FRACTURE REDUCTION MAINTAINER
Document Type and Number:
WIPO Patent Application WO/2022/135008
Kind Code:
A1
Abstract:
A minimally invasive minimal stress shielding fracture reduction maintainer, which falls under orthopedic medical instruments. The maintainer comprises a cylindrical flexible body portion (1) and helical pieces (2), different pointed portion shapes being provided at two ends of the flexible body portion (1), the helical pieces (2) being inclined helical blades, and a plurality of helical pieces (2) being coaxially arranged on the flexible body portion (1). The flexible body portion (1) is supported in suspension at an axially central position of a medullary cavity, and is not in contact with or fixed to an inner wall of the medullary cavity, causing fatigue resistance thereof to be the strongest, and stress shielding to be the most minimal; and allowing the fracture to be automatically reduced; the flexible body portion (1), a fractured end and a bone callus are subjected to equal stress; when flexible reduction is maintained at equilibrium, the minimally invasive minimal stress shielding fracture reduction maintainer has zero stress shielding, there is no interference in the healing of the fracture, the bone callus of the fractured end can accept pre-fracture original stress stimulation, becoming a force that drives healing of the fracture; gene expression of osteoblasts of the fracture site is triggered, and protein synthesis corresponding to bone formation is accelerated; bone marrow stromal stem cells quickly evolve into osteocytes, proliferate, and ossify, and the bone callus quickly calcifies, consequently promoting the bone fracture to more rapidly heal to an original form and structure of the bone.
Inventors:
WANG YONGQING (CN)
Application Number:
PCT/CN2021/132939
Publication Date:
June 30, 2022
Filing Date:
November 25, 2021
Export Citation:
Assignee:
WANG YONGQING (CN)
International Classes:
A61B17/72
Foreign References:
| CN112587216A | 2021-04-02 | |||
| CN215129892U | 2021-12-14 | |||
| US5716358A | 1998-02-10 | |||
| US20170065424A1 | 2017-03-09 | |||
| CN109620376A | 2019-04-16 | |||
| US6261292B1 | 2001-07-17 | |||
| US3466748A | 1969-09-16 |
Attorney, Agent or Firm:
TIANJIN HEZHENG INTELLECTUAL PROPERTY AGENCY LTD (CN)
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