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All Journal International Journal Science and Technology (IJST) Jurnal Teknik dan Science (JTS) Journal of Creative Student Research
Mohammad Rofi’i
Sekolah Tinggi Ilmu Kesehatan Semarang
Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Social Sciences Transportation

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Perancangan Alat Inovasi pembacaan hasil ukur debit dan volume air kencing menggunakan wireless dan printer pada uroflowmetry Dinyo Mikananta Rifaco; Mohammad Rofi’i; Florentinus Budi Setiawan
Jurnal Teknik dan Science Vol. 4 No. 2 (2025): Juni : Jurnal Teknik dan Science
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/jts.v4i2.2104

Abstract

Urinary Tract Infections (UTIs) can be identified through several indicators, such as difficulty urinating, weak urine flow, and low urine volume. To enhance the diagnosis and monitoring of this condition, a wireless-based uroflowmeter equipped with a thermal printer has been developed. This device utilizes a YF-S401 flow sensor to measure urine flow rate and volume, with pulse outputs processed by an Arduino UNO microcontroller. A Bluetooth module (HC-05) is used for wireless data transmission to an Android-based application (developed using App Inventor), while the measurement results can also be printed via a thermal printer. Volume testing demonstrated low error rates (0.33% – 1.53%), and flow rate testing produced results close to actual values. The device successfully connected wirelessly to the application and printed data accurately, indicating that it is suitable for supporting uroflowmetry examinations.
Design and Development of a Negative Pressure Wound Therapy Device Citra Ananda Adri Hanifa; Mohammad Rofi’i; Patrisius Kusi Olla
International Journal Science and Technology Vol. 4 No. 2 (2025): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v4i2.2199

Abstract

This study presents the design and development of a Negative Pressure Wound Therapy (NPWT) device aimed at improving the treatment of chronic wounds, particularly diabetic foot ulcers in patients with diabetes mellitus. The primary objective is to create an efficient, user-friendly, and portable wound therapy solution suitable for both clinical and home-based care. The device utilizes negative pressure to enhance blood perfusion, reduce exudate, and lower infection risk, thereby accelerating the healing process. The system is built using a NodeMCU ESP32 microcontroller, a vacuum motor pump, HX710 pressure sensor, solenoid valve, and a Nextion LCD interface. It supports three therapy modes—Continuous, Intermittent, and Dynamic—controlled by a PID algorithm to maintain stable pressure between -25 to -150 mmHg. Testing was conducted at three measurement points: battery voltage, sensor accuracy, and LCD interface functionality. Results indicate that the device performs effectively within expected operational parameters across all modes. The NPWT prototype offers a cost-effective, functional alternative for wound care management and shows promise for further development, including digital integration and broader clinical applications.
Rancang Bangun Alat Kalibrator Tensimeter NIBP Anak dan Dewasa Muhammad Valen Brilian; Mohamad Sofie; Mohammad Rofi’i
Journal of Creative Student Research Vol. 4 No. 4 (2026): Agustus: Journal of Creative Student Research
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jcsr-politama.v4i4.6524

Abstract

Blood pressure is a vital parameter for diagnosing and monitoring cardiovascular conditions; therefore, the accuracy of digital blood pressure monitors (NIBP) must be maintained through periodic calibration using standard calibrators. However, commercial calibrators are relatively expensive and difficult to access, particularly for educational laboratories and resource-limited healthcare facilities. This study aimed to design, construct, and test the performance of an NIBP calibrator for pediatric and adult monitors—based on the STM32F407VGT6 microcontroller—capable of generating controlled blood pressure and heart rate simulations. The research methodology involved hardware and software design, circuit voltage measurement point testing, and a comparative performance test against both the developed NIBP simulator and a commercial NIBP simulator (used as a reference). Voltage test results aligned with component datasheet specifications. Performance testing involved five repetitions for systolic and diastolic parameters, comparing the developed calibrator with the commercial one. Results showed that all systolic and diastolic measurements fell within tolerance limits relative to standard settings, with a maximum average deviation of 2.2 mmHg. In the comparative test, all measurement points met the ±5 mmHg tolerance; the largest deviation was 5 mmHg (diastolic parameter at the highest pressure point of 100 mmHg), placing it exactly at the tolerance limit.
Co-Authors Citra Ananda Adri Hanifa Dinyo Mikananta Rifaco Florentinus Budi Setiawan Mohamad Sofie Muhammad Valen Brilian Patrisius Kusi Olla