Proposed Topic (Most preferred): :
Research and Innovations (new projects / technology / innovations / service models)
Authors (including presenting author) :
Li W M, So W S, Chan I C H, Loong F Y, Ku W N, Kong S B
Affiliation :
Occupational Therapy Department, Yan Chai Hospital
Introduction :
Treatment for traumatic elbow is often challenging due to the anatomical structure, ligamentous stability and soft tissue excursion. Developing stiffness in the elbow joint is common after trauma. Patients with elbow dislocation, fracture and ligament injuries likely would be referred to occupational therapists for hinged elbow brace. Meticulous angle adjustment could control specific range of motion of the injured elbow. Hence, early controlled elbow mobilization with the brace could comply with clinical needs and prevent joint stiffness. Fabrication of the hinge is time-consuming and skill demanding. Quality control is always an issue. 3D printed (3DP) adjustable hinge is able to tackle the mentioned difficulties.
Objectives :
(1) to reduce manpower input or production time of the hinge
(2) to promote accuracy, consistency and standardization of output
(3) to relieve precision work strain
Methodology :
(1) Problems / Parts were identified for feasibility by using 3D printing technology
(2) Adjustable hinges were designed and reviewed
(3) 3D printing of adjustable hinges were conducted
(4) Mechanical tests of the 3DP adjustable hinges were proceeded for durability and clinical safety
(5) Clinical trial was implemented
(6) Defects were reviewed and modifications were conducted
(7) Clinical application and staff survey were accomplished
Result & Outcome :
Results
This project was started in June 2023. Stress and repetitive test were performed. In the course of evolution, three versions of the 3DP adjustable hinge were designed as according to clinical needs and defects. The hinge in latest version was applied to 5 patients. Those served same function as the conventional design in aluminum material. No marked defect was reported. In view of fabrication time, staffs reported with 50-60% in time saving. According to staff survey, “strongly agree” of improvement in following items were identified:
- WorkFlow = 40%
- Accuracy = 80%
- Strain reduction from Precision work = 67%
- Task simplification= 73%
- Appearance / product presentation = 67%
Conclusion
3D printing technology was efficient and effective in adjustable hinge fabrication. Two major areas of enhancement were noted, i.e. “Accuracy” and “Task simplification”. Reproducibility of the 3DP hinge may be achieved by sharing printable file via OTCOC among HA hospitals. Application of the technology in other parts of splinting therapy or other clinical areas could be explored to attain better patient care.
