Design and Analysis of a New Cerebrospinal Fluid Drainage Separation Device
10.16156/j.1004-7220.2021.02.19
- VernacularTitle:新型脑脊液引流分离装置的设计及分析
- Author:
Jing LU
1
;
Bin GE
1
;
Rongguo YAN
2
;
Maomao WANG
3
;
Chao LI
1
;
Jun WANG
1
;
Yi’nan CHEN
1
Author Information
1. School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology
2. School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology；Shanghai Engineering Research Center of Interventional Medical Device
3. Department of Neurosurgery, the First Affiliated Hospital of the Second Military Medical University
- Publication Type:Journal Article
- Keywords:
drainage device;
finite element analysis;
electromagnetic force;
magnetic induction
- From:
Journal of Medical Biomechanics
2021;36(2):E290-E296
- CountryChina
- Language:Chinese
-
Abstract:
Objective Based on the existing clinical drainage device, two novel mechanisms were designed for the connection between the drainage tube of the patient and the drainage tube of the drainage bag, so as to compare such two mechanisms and validate whether the mechanisms can meet the design requirements for clinical use. Methods Mechanism 1 used the method of electromagnetic drive to pull in and Mechanism 2 used the magnetization method of permanent magnet to pull in. The finite element model of static electromagnetic field was established. The force of the two mechanisms under different currents was compared, and the distribution of magnetic field lines and magnetic induction intensity was analyzed. Simulation experiments were designed for preliminary experimental research. Results Under the pull-in state, the maximum magnetic induction of Mechanism 1 and Mechanism 2 at the closed end surface was found in contact area of the two iron cores. The suction force of Mechanism 1 could be adjusted by the current. When the current was 1 A, the maximum magnetic induction intensity at the closed end was 0.76 T, the electromagnetic force measured by the experiment was 6.08 N, the magnetic force of Mechanism 2 was 6.68 N, which was smaller than the 8 N suture tension. Mechanism 2 was separated by supplying the driving coil with a reverse magnetic field. Conclusions When the current was 1 A, Mechanism 1 could meet the magnetic attraction requirements, and Mechanism 2 could be separated when the current reached 1.8 A. Both mechanisms met the requirements of clinical design, but Mechanism 2 was more secure in the process of application. The feasibility of the mechanism structure was verified by finite element analysis and experimental test.
