Design and Construction of Adjustable Mini-standing for Children from 4 to 9 Years Old with Diplegic, Triplegic or Hemiplegic Cerebral Palsy

The present paper sought to redesign, technify and adjust to different sizes of a mini-standing to improve the physical therapy of children from 4 to 9 years old with mild cerebral palsy or in medical conditions that moderately affect their lower body. This orthopedic attachment provides support to the calf of the patient, resembling its body to a cantilevered element. This allows the patient to improve their posture and safety and prevent bone deformations. To achieve this attachment, simplified design techniques were complemented with Autodesk Inventor finite elements, also additive manufacturing in Polylactic Acid polymer PLA was used for structural parts like the calf support; Likewise, Computerized Numerical Control (CNC) was carried out on Nylon 6/6, a material used due to hygiene and lubrication between parts. A functional and safe prototype is obtained that meets the required age range, whose limitations are children of 120 cm or 30 kg. These were determined in the design requirements and verified with own replicable tests, as well with ASTM (American Society of Testing Materials) standards.