효율적인 환자관리를 위한 링거액 감지기 및 송수신기 설계

송제호(Je-Ho Song),이인상(In-Sang Lee),이유엽(You-Yub Lee) 한국산학기술학회 2016 한국산학기술학회논문지 Vol.17 No.9

본 논문에서는 효율적인 환자관리를 위한 링거액 감지기 및 송수신기를 설계 하고자 한다. 링거액 감지기 및 송수신기는 메인 제어부, 링거액 감지부, 디스플레이 및 경고 발생부, 무선 송수신부, 전원 공급부로 구성된다. 메인 제어부에서는 GC89L591A0-MQ44IP의 CPU를 사용하여 전체 시스템을 제어하고 링거액 감지부는 수광부에 TSL235R-LF 포토다이오드, 투광부에 Water-Clear Type LED를 적용하였다. 또한, 디스플레이 및 경고 발생부는 7-세그먼트와 적색 LED를 적용하였으며 무선 송수신부는 NR-FPCX 모듈을 사용하여 데이터를 송수신하였다. 전원 공급부는 건전지를 사용하며 일반 전원이나 충전식 전원도 사용할 수 있도록 하였다. 따라서, 효율적인 환자관리를 위한 링거액 감지기 및 송수신기 설계에 대한 연구 결과 링거액이 포토다이오드에 의해 감지되었을 때 주파수는 11.95kHz이며, 감지되지 않았을 때는 9.6kHz로 측정되었다. 이때, 링거액의 감지 데이터가 링거액 송신기를 통해 출력되지 않을 때는 “0” 으로, 출력되었을 때는 해당 병실의 호실 정보가 링거액 수신기에 표시됨을 확인 할 수 있었다. 또한, 링거액 감지기의 사용전원은 신호가 감지되지 않을 때에는 Sleep 모드로 전환하여 배터리 절약 모드로 동작하며 링거액 송수신기는 대략 700m이내의 거리에서 무선 송수신이 가능하다. This paper reports a Ringer"s solution detector and transceiver design for the efficient management of patients. The ringer"s solution detection and transceiver consisted of the main control part, ringer"s solution detection part, display and warning light part, wireless transceiver, and power supply part. The light receiving part of the ringer"s solution detection part employed TSL260R-LF photodiode; light permeating part, Water-Clear type LED; and wireless transceiver part, the RF wireless data transceiver module, NR-FPCX. As a result of this Ringer"s solution detector and transceiver design that can manage the patient efficiently, it was found that when the ringer"s solution was detected by the double photodiode, the operating frequency was 11.95kHz; when it was not detected, the number was 9.6kHz. In the ringer"s solution receiver, when the ringer"s solution was detected, the number was 0. The corresponding unique RF code was displayed when not detected. The power used in the ringer"s solution detection part was converted to the Sleep mode to operate under battery save mode. The ringer"s solution transceiver can exchange wireless communication approximately within a 700m radius.

정전용량변화를 이용한 링거액소진감지장치의 구현

김청월 ( Cheng Worl Kim ) 한국센서학회 2010 센서학회지 Vol.19 No.1

Electrostatic capacitance measurement method in a fine hose was proposed, in which two ring-type electrodes were disposed on the hose in the direction of fluid flow instead of the conventional face-to-face electrodes. With the proposed electrode structure, we realized a Ringer`s solution exhaustion detector for an IV(invasive vein) injection set. On a 4mm-diameter hose of IV set, we disposed two ring-type electrodes of 10 mm width at a distance of 5 mm each other and obtained 0.72 pF and 2.51 pF for air and 10% dextrose Ringer`s solution in the hose, respectively. The capacitance between the two electrodes varied with the hose-wraparound coverage of electrode as well as the width of electrode and the distance between the electrodes. For hose-wraparound electrode coverage of 75%, the capacitance varied from .62 pF to 1.98 pF with the Ringer`s solution level between the two electrodes. A charge amplifier converted the capacitance variation into electric signal and a comparator was used to detect whether Ringer`s solution was exhausted or not. The result was delivered to a host using a RF transmitter with 320MHz carrier frequency.

Kinetics of volume expansion during infusion of Ringer’s solution based on single volume model

여영구,최규택 한국화학공학회 2006 Korean Journal of Chemical Engineering Vol.23 No.4

this work the kinetics of volume changes of fluid spaces asociated with infusion of Ringer’s solutionare analyzed by using the single-fluid space model. During infusion of Ringer’s solution, the human body is assumedto be characterized by the single-fluid space model into which fluid is fed and from which fluid leaves. Various infusiontypes were tested to accommodate different medical situations. Volunteers were given Ringer’s solution and the changesfound to represent adequately the kinetics of human volume expansion during infusion of Ringer’s solution.

Development of an Al-load-cell-based wireless ringer’s solution monitoring and alarm system: insight into vibrational error correction

Hyun Seok Moon,Eue-Soon Jang 대한의용생체공학회 2019 Biomedical Engineering Letters (BMEL) Vol.9 No.2

In this study, we developed an aluminum-load-cell-based wireless Ringer’s solution monitoring and alarm (WRMA) system. The Al load cell was designed with a rectangular shape, and the load was concentrated in the lower beam part of the loadcell because of the anisotropic thickness. From the static analysis, we identifi ed the appropriate location for a Wheatstonebridge circuit consisting of four strain gauges. In addition, the modal and harmonic analyses showed that the vibrational frequenciesof the hospital environment do not seriously interfere with the output voltage of the Al load cell. However, randomvibrations generated by the movement of the WRMA system on various surfaces severely increase the standard deviation ofthe measured solution weight by ± 10 g or more. Such vibrational error is too large because the average weight of Ringer’ssolution is 30–40 g at the time of replacing Ringer’s solution. Thus, this error could be confusing for nurses and result inmistakes in the timely replacement of the Ringer’s solution. However, the standard deviation of the measured weight wasdramatically reduced to ± 3 g or less by using the vibration correction algorithm developed in the present study.

Biotechnology : Kinetics of volume expansion during infusion of Ringer`s solution based on single volume model

( Kyu Taek Choi ),( Yeong Koo Yeo ) 한국화학공학회 2006 Korean Journal of Chemical Engineering Vol.23 No.4

Comparison of normal saline solution with low-chloride solutions in renal transplants: a meta-analysis

( Abdullah Jahangir ),( Syeda Sahra ),( Muhammad Rafay Khan Niazi ),( Fasih Sami Siddiqui ),( Muhammad Yasir Anwar ),( Ahmad Jahangir ),( Elie J. El-charabaty ) 대한신장학회 2021 Kidney Research and Clinical Practice Vol.40 No.3

Background: Normal saline solution (NSS) has been the fluid of choice for renal transplant patients, but it can lead to hyperchloremic acidosis and hyperkalemia. This study was performed to compare the safety profile of low-chloride solutions with that of NSS in renal transplant patients. Methods: We conducted a systemic review search on PubMed, Embase, and the Central Cochrane Registry. Randomized clinical tri-als (RCTs) and matched cohort studies involving NSS as the control arm and low-chloride solutions as an intervention arm were cho-sen. The standardized mean difference for continuous variables, the odds ratio (OR) for discrete variables, and a 95% confidence in-terval (CI) for effect sizes were used. A p-value of <0.05 was considered statistically significant. Analysis was performed using a ran-dom-effects model irrespective of heterogeneity, which was evaluated using I² statistics. Results: Nine RCTs and one cohort study with a total of 726 patients were included. After transplantation, serum potassium was sig-nificantly lower in the low-chloride group (standardized mean difference compared to NSS group, -0.38 mEq/L; 95% CI, -0.66 to -0.11; p = 0.007). Similarly, postoperative chloride was lower in the low-chloride group (-2.41 mEq/L [-3.34 to -1.48], p < 0.001). No statistically significance was observed in delayed graft function (OR, 0.98 [0.56-1.69], p = 0.93), day 3 creatinine (-0.14 mg/dL [-0.46 to 0.18], p = 0.38), or day 7 urine output (-0.08 L [-0.29 to 0.12], p = 0.43). onclusion: Use of NSS during renal transplant leads to increased incidence of hyperchloremic acidosis with subsequent hyperkale-mia, but clinical significance in the form of delayed graft function or postoperative creatinine remains comparable to that of low-chlo-ride solutions.

Comparison of the trometamol-balanced solution with two other crystalloid solutions for fluid resuscitation of a rat hemorrhagic model

Wen-Ting Ting,Ru-Wen Chang,Chih-Hsien Wang,Yih-Sharng Chen,Jih-Jong Lee 대한수의학회 2020 Journal of Veterinary Science Vol.21 No.1

Currently, the optimal resuscitation fluid remains debatable. Therefore, in the present study, we designed a trometamol-balanced solution (TBS) for use as a resuscitation fluid for hemorrhagic shock. Hemorrhagic shock was induced in 18 male Wistar-Kyoto rats, which were assigned to normal saline (NS), Ringer's solution (RS), and TBS groups. During the hemorrhagic state, their hemodynamic parameters were recorded using an Abbott i-STAT analyzer with the CG4+ cartridge (for pH, pressure of carbon dioxide, pressure of oxygen, total carbon dioxide, bicarbonate, base excess, oxygen saturation, and lactate), the CG6+ cartridge (for sodium, potassium, chloride, blood glucose, blood urea nitrogen, hematocrit, and hemoglobin), and enzyme-linked immunosorbent assay kits (calcium, magnesium, creatinine, aspartate aminotransferase, alanine aminotransferase, bilirubin, and albumin). Similar trends were found for the parameters of biochemistries, electrolytes, and blood gas, and they revealed no significant changes after blood withdrawal-induced hemorrhagic shock. However, the TBS group showed more effective ability to correct metabolic acidosis than the NS and RS groups. TBS was a feasible and safe resuscitation solution in this study and may be an alternative to NS and RS for resuscitation in hemorrhagic shock patients without liver damage.

Intraoperative fluid therapy for video-assisted ovariohysterectomy in dogs

Marília Teresa de Oliveira,João Pedro Scussel Feranti,Gabriela Pesamosca Coradini,Rafael Oliveira Chaves,Luis Felipe Dutra Corrêa,Marcella Teixeira Linhares,Roberto Thiesen,Marco Augusto Machado Silva 대한수의학회 2021 Journal of Veterinary Science Vol.22 No.3

Background: Intraoperative fluids are still poorly studied in veterinary medicine. In humans the dosage is associated with significant differences in postoperative outcomes. Objectives: The aim of this study is to verify the influence of three different fluid therapy rates in dogs undergoing video-assisted ovariohysterectomy. Methods: Twenty-four female dogs were distributed into three groups: G5, G10, and G20. Each group was given 5, 10, and 20 mL·kg−1·h−1 of Lactate Ringer, respectively. This study evaluated the following parameters: central venous pressure, arterial blood pressure, heart rate, respiratory rate, temperature, acid-base balance, and serum lactate levels. Additionally, this study evaluated the following urinary variables: urea, creatinine, protein to creatinine ratio, urine output, and urine specific gravity. The dogs were evaluated up to 26 h after the procedure. Results: All animals presented respiratory acidosis during the intraoperative period. The G5 group evidenced intraoperative oliguria (0.80 ± 0.38 mL·kg−1·h−1), differing from the G20 group (2.17 ± 0.52 mL·kg−1·h−1) (p = 0.001). Serum lactate was different between groups during extubation (p = 0.036), with higher values being recorded in the G5 group (2.19 ± 1.65 mmol/L). Animals from the G20 group presented more severe hypothermia at the end of the procedure (35.93 ± 0.61°C) (p = 0.032). Only the members of the G20 group presented mean potassium values below the reference for the species. Anion gap values were lower in the G20 group when compared to the G5 and G10 groups (p = 0.017). Conclusions: The use of lactated Ringer's solution at the rate of 10 mL·kg−1·h−1 seems to be beneficial in the elective laparoscopic procedures over the 5 or 20 mL·kg−1·h−1 rates of infusion.

Specific A549 cancer cell treatment through plasma-activated Ringer's lactate solution-7(PAL-7) fabricated by microfluidics-embedded plasma system

성주용,박범준,허윤석 한국공업화학회 2023 한국공업화학회 연구논문 초록집 Vol.2023 No.1

Targeted therapy for lung cancer cells using plasma-activated Ringer's lactate, produced by a microfluidics-integrated bioplasma device

성주용,박범준,허윤석 한국공업화학회 2024 한국공업화학회 연구논문 초록집 Vol.2024 No.0