Analisis Performansi Stent Ureter Menggunakan Simulasi 2D Berbasis Metode Elemen Hingga (FEM)

Syarani, Karimah (2026) Analisis Performansi Stent Ureter Menggunakan Simulasi 2D Berbasis Metode Elemen Hingga (FEM). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Stent ureter merupakan perangkat medis esensial untuk menjaga patensi saluran kemih; namun risiko migrasi masih menjadi tantangan klinis. Kekuatan retensi yang dipengaruhi oleh desain koil pigtail merupakan parameter kunci dalam menjaga stabilitas stent. Penelitian ini menganalisis pengaruh variasi jumlah lilitan (1, 1,5, dan 2 koil) pada ujung penahan stent terhadap respons mekanik menggunakan simulasi dua dimensi (2D) berbasis Metode Elemen Hingga (Finite Element Method, FEM) dengan pendekatan aksisimetris. Model uji tarik disimulasikan sesuai standar ASTM F1828-22 menggunakan perangkat lunak ANSYS, di mana stent ditarik melalui funnel block untuk mengukur gaya retensi maksimum dan distribusi tegangan von Mises. Hasil simulasi menunjukkan bahwa gaya retensi pada ketiga variasi desain berada dalam kisaran yang relatif sama (≈ 1,09 N dengan perbedaan < 5%), namun pola distribusi tegangan memperlihatkan perbedaan yang signifikan. Desain dengan distribusi tegangan yang lebih merata menghasilkan nilai tegangan rata-rata yang lebih rendah, yang secara biomekanik diprediksi dapat meningkatkan kenyamanan pasien. Simulasi 2D aksisimetris berbasis FEM menawarkan pendekatan yang efisien secara komputasi untuk mengevaluasi desain stent ureter sebelum dilakukan pengujian fisik, serta mendukung pengembangan desain stent ureter dalam negeri yang lebih optimal.
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Ureteral stents are essential medical devices for maintaining urinary tract patency; however, stent migration remains a significant clinical challenge. Retention strength, which is influenced by the pigtail coil design, is a key parameter for ensuring stent stability. This study investigates the effect of coil winding variations (1, 1.5, and 2 coils) at the stent retention end on mechanical response using a two-dimensional (2D) Finite Element Method (FEM) simulation with an axisymmetric approach. The pull test was simulated in accordance with the ASTM F1828-22 standard using ANSYS, where the stent was pulled through a funnel block to obtain the maximum retention force and von Mises stress distribution. The results indicate that the retention forces of all three designs fall within a similar range (approximately 1.09 N with differences < 5%), while the stress distribution patterns exhibit notable differences. Designs with more uniform stress distribution show lower average stress levels, which are biomechanically predicted to enhance patient comfort. The 2D axisymmetric FEM-based simulation provides a computationally efficient approach for evaluating ureteral stent designs prior to physical testing and supports the development of more optimal domestically manufactured ureteral stents.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Stent ureter, Metode Elemen Hingga, simulasi aksisimetris dua dimensi, kekuatan retensi, ASTM F1828-22, ANSYS. Ureteral stent, Finite Element Method, two-dimensional axisymmetric simulation, retention strength, ASTM F1828-22, ANSYS.
Subjects:	R Medicine > R Medicine (General) > R856.2 Medical instruments and apparatus.
Divisions:	Faculty of medicine and health (MEDICS) > Medical Technology > 11503-(S1) Undergraduate Thesis
Depositing User:	Karimah Syarani
Date Deposited:	31 Jan 2026 07:40
Last Modified:	31 Jan 2026 07:40
URI:	http://repository.its.ac.id/id/eprint/131460

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