• 대한간호학회지
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• 제25권1호
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• pp.88-98
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• 1995

The Fluid and electrolytes balance in the body is of critical importance in maintaining good health. When the fluid and electrolyte imbalance is present, patients are in great danger. They must be assessed immediately by a nurse so that appropriate treatment can be started as soon as possible. Patients' fluid intake and output records contain highly important information for the diagnosis and treatment of fluid imbalance, but, these records are often inaccurate and the method of recording the fluid intake is not universal for every hospital. Be-cause they are few quantitative measurements of a patient's hydration, the need to improve the accuracy of fluid intake records is very important. However, very few studies have been done to investigate the accuracy of measurements of patients' fluid intake and output. The purpose of this study was to investigate the methods used for calculation of fluid intake which is most similar to fluid output in normal adults and hospitalized patients. This study focused on three different calculation methods for fluid intake and compared these to fluid output and developed suggestions as to the ideal way to record fluid in-take. Data for 43 hospitalized patients and 37 normal adults were analyzed. The findings of this study are as follows ; 1) In normal adults, the daily intake of water which enteres by the oral route was 2415m1 (the first method of calculation). The daily intake of water in the form of pure water or some other beverage was 1365m1 (the third method of calculation) The daily intake of water including fresh fruits and vegetables, rice, porridges, and Me m which have water content more than 80% were 2186m1 (the second method of calculation). 2) The urine output of the normal adults was 1350m1. This apprroximates the amount of fluid an adult takes in the form of pure water. 3) In patient group, the total intake of water was 2550m1 (the first method of calculation). The in-take of water in the form of pure water or as some other beverage and IV fluid was 1661m1 (the third method of calculation). The daily in-take of water including foods which have high water content was 2356m1 (the second method of calculation). 4) The urine output of the patient's group was 1728m1. This approximates the amount of fluid an adult takes in the form of pure water. 5) Investigation of the method of calculation of the patient fluid intake showed that among the 31 hospitals studied, only eight use the third method of calculation which reflects the most close value to urine output. From the results obtained in this study, it was indicated that the amount of fluid taken in the form of pure water reflects the most close value to urine output. Therefore, it can be suggested that the third method of calculation which includes water in-take only in the form of pure water or beverage should be used as patients' fluid intake record.

• 대한간호학회지
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• 제26권3호
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• pp.688-696
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• 1996

The purpose of this study was to investigate the fluid balance of the patients who were either on soft fluid diet or total parenteral nutrition. We studied 19 patients with neurologic disorders and 22 patients with oromaxillary surgery who were admitted to either D university hospital in Choognam or S general hospital in Seoul between May and November 1995. The mean age for the patients who had oromaxillary surgery was 24 years and their average hospital stay was 9 days. The mean age of the patients with neurologic disorders was 54 years and they were bedridden for average of 71 days. For the maxillary bone surgery patients we did not limit the range of their activities in the ward during data collection period. The patients with neurological disorders were bedridden and did not move around the ward. They were all either on soft fluid diet, or total parenteral nutrition. The findings of this study are as follows ; 1) The difference of the triceps skinfold thickness between the baseline and the final measurement was 0.4cm for neurologic patient group and 0.5cm for oromaxillary surgery patient group. The difference was not statistically significant in each group. 2) In the oromaxillary surgery patient group, the daily intake of fluid in the form of pure water, other beverages, fluid diet as well as IV fluid was 4581m1 while urine output was 2979ml. The difference between fluid intake and output was statistically significant, indicating that fluid intake was far more than urine output. In neurologic patient group, the daily intake of fluid including water from fluid diet and IV fluid was 2701m1 whereas urine output was 2253m1 and they were statistically significant. 3) For a more accurate assessment we adjusted the fluid balance based on weight changes during data collection period. In the oromaxillary surgery patient group. the difference between fluid intake and output was 1238m1 after weight changes being adjusted. The difference was statistically significant, suggesting fluid overload in this patient group. In neurologic patient group, the difference between fluid intake and output considering weight changes was 124ml. The difference was not statistically significant, suggesting that the fluid intake and output was well balanced in this patient group.

• 한국생산제조학회지
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• 제8권6호
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• pp.92-97
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• 1999

This paper reports by simple method that is quickly corrected the effects of fluid temperature for the hot wire anemometer. We are concerned with a variable output of hot wire anemometer on arbitrary fluid temperature. Hot wire by measuring boundary layer of turbulent flow has been calibrated by arbitrary temperature lower than 10$0^{\circ}C$, and velocity lower than 20m/s. As a result, we could pick up the temperature factor affected by output of hot wire anemometer from related in output of arbitrary temperature to output of room temperature. By using temperature factor on the output of hot wire anemometer, we also obtained that the relationship of velocity was of no effect by temperature of fluids. About results of calibrated hot wire, uncertainly of velocity is 2.15% at room temperature and 3.1% at arbitrary temperature.

• Journal of Dental Anesthesia and Pain Medicine
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• 제20권3호
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• pp.129-135
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• 2020

Background: Postoperative fluid retention is a factor that causes delay in recovery and unexpected adverse events. It is important to prevent intraoperative fluid retention, which is putatively caused by intraoperative release of stress hormones, such as ADH (anti-diuretic hormone) or others. We hypothesized that intraoperative analgesia may prevent pathological fluid retention. We retrospectively explored the relationship between analgesics and in-out balance in surgical patients from anesthesia records. Methods: Anesthetic records of 80 patients who had undergone orthognathic surgery were checked in this study. Patients were anesthetized with either TIVA (propofol and remifentanil) or inhalational anesthesia (sevoflurane and remifentanil). During surgery, acetated Ringer's solution was infused for maintenance at a rate of 3-5 ml/kg/h at the discretion of the anesthetist. The perioperative parameters, including the amount of crystalloid and colloid infused, and the amount of urine and bleeding were checked. Furthermore, we checked the amount and administration rate of remifentanil during the surgical procedure. The correlation coefficient between the remifentanil dose and the in-out balance or the urinary output was analyzed using the Pearson correlation coefficient. The contributing factor to fluid retention, including urinary output, was statistically examined by means of multivariate logistic regression analysis. Results: A significant positive correlation was found between remifentanil dose and urinary output. Urinary output less than 0.04 ml/kg/min was suggested to cause positive fluid balance. Although in-out balance approaches zero balance with increase in remifentanil administration rate, no contributing factor for near-zero fluid balance was statistically picked up. The remifentanil administration rate was statistically picked up as the significant factor for higher urinary output (> 0.04 ml/kg/min) (OR, 2,644; 95% CI, 3.2-2.2 × 10⁶) among perioperative parameters. Conclusions: In conclusion, remifentanil contributes in maintaining the urinary output during general anesthesia. Although further prospective study is needed to confirm this hypothesis, it was suggested that fluid retention could be avoided through suppressing intraoperative stress response by means of appropriate maintenance of remifentanil infusion rate.

• 성인간호학회지
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• 제25권5호
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• pp.567-573
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• 2013

Purpose: The purpose of this study was to compared two methods for measuring fluid intake and to assess the most effective method. Methods: Data from 44 hospitalized patients with chronic kidney disease was analyzed. Two methods were used. The liquid method is to measure the daily intake of water in the form of pure water or some other beverage and IV fluid, the liquid-solid method is to measure the daily intake of water which enters by the oral route and IV fluid. Results: The daily intake of fluid was 1483.10mL and 2245.99mL respectively. The fluid output was 1883.72 mL. The Intra-Class Correlation (ICC) between the liquid method and the liquid-solid method and fluid output was 0.64 and 0.69, respectively. The correlation between differences of fluid in two methods and body weight change was r=.47 (p<.001) and r=.56 (p<.001), respectively. Conclusion: The results of this study suggest that there are no difference between the two measuring methods as to reflecting the most close value to fluid output. And the difference between intake and output by two methods is correlated with body weight change. Therefore, it can be suggested that the either method could be useful as patients' fluid intake measurement.

• 임상간호연구
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• 제22권1호
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• pp.20-27
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• 2016

Purpose: The purpose of this study was to compare the fluid intake and output (I&O) measurement methods in order to figure out more effective and easier method for medical patients Methods: 71 hospitalized patients participated in the study. In "liquid only (LO)" method, all amount of water was summed up including any liquid types of food and IV fluids. In "whole food(WF) intake," all liquid and solid food intake and IV fluids were added up. Results: The average amount of fluid intake was 2105.29 ml for LO method and 2523.54 ml for WF method. The average amount of fluid output was 2148.98 ml. The intra-class correlations (ICC) between the intake and output measures by the two different methods was 0.803 and 0.826, respectively. The correlation between the differences of intake/output and body weight change in two different methods was r=.347 (p=.003), and r=.376 (p=.001), respectively. Conclusion: The results of this study indicate that both LO and WF method may be useful in monitoring patients' fluid balance. Given the comparability of using LO over WF, it is suggested that measuring just liquid only intake as the indicator of patient's intake is applicable in clinical setting.

• 근관절건강학회지
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• 제23권2호
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• pp.84-94
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• 2016

Purpose: This research aimed to identify levels of nurses' perception and practice of fluid intake and output (I & O) measurement and to explore the relationship between perception and practice of it. Methods: Using a cross-sectional survey design, 195 nurses who practiced fluid I & O measurement were recruited from a general hospital. Nurses who agreed to participate in this study completed a structured study questionnaire to assess their levels of perception and practice of fluid I & O measurement. Results: A level of perception of I & O measurement was high (3.46 points out of 5), and scores for 3 subdomains of I & O (importance, accuracy, and efficacy) were evenly high. The level of practice of I & O was fairly high (3.76 points out of 5). Perception and practice of I & O were highly correlated (r=.73, p<.001). Conclusion: Nurses seem to have higher levels of perception and do practice fluid I & O measurement correctly. In order to have reliable and valid I & O measures, nurses need to have continuous education on I & O measurement based on clinical guideline to utilize it as an invaluable clinical instrument.

• Journal of Biosystems Engineering
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• 제20권3호
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• pp.205-216
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• 1995

A fast and inexpensive approximate analysis method to predict power output characteristics of the Stilting engines in a preliminary design stage was investigated. In basic equations proposed by Walker, typical temperatures of working fluids in expansion and compression spaces were treated as those of working fluids in heater and cooler respectively. While the temperature of working fluid in the expansion space was actually lower than that of working fluid in the heater, the temperature of working fluid in the compression space was higher than that of working fluids in the cooler. In this paper, the working fluid temperature of expansion space was treated as lower than the heater temperature and that of compression space was treated as higher than the cooler temperature. Also, according to them, the power output characteristics of the Stirling engine were evaluated with respect to the GPU-3 and 4-215 Stilting engines. The following conclusions were drawn from the analysis. 1. Using the available experimental data from the GPU-3 Stirling engine, it was shown that the approximate analysis predicts the brake power with a maximum error of 19 percent at 1, 000rpm and with a minimum error of 3 percent at 2, 000rpm. 2. The approximate analysis data which for the GPU-3 Stirling engine were much closer to the experimental data than those of adiabatic 2nd order and 3rd order analysis within 1, 500rpm to 2, 500rpm. 3. The approximate analysis data which for the GPU-3 and 4-215 Stilting engines were much closer to the experimental data than those of the Beal number analysis.

• 조명전기설비학회논문지
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• 제26권11호
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• pp.40-47
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• 2012

Most of existing wind turbine system is used with geared type; however, this type has lots of problems which are noisy, weight, maintenance and so on. In this paper, wind turbine system with fluid torque converter applied to solve these problems. In case of the proposed wind turbine system, it is possible to transmit torque to adaptable distance. So various sets including generator, inverter and auxiliary motor move from the nacelle to the ground. As a result, Total weight in Nacelle can be decreased. however, the efficiency can be decreased with fluid torque system. We also applied auxiliary motor to fluid torque system. So, we also realized rated revolutions and rated output windturbine and could get considerable good data.

• 기본간호학회지
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• 제18권2호
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• pp.168-176
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• 2011

Purpose: The purpose of this study was to identify differences between intake and output balance and body weight changes and to identify factors related to differences in critically ill patients. Methods: The participants for this descriptive correlational study were 65 medical surgical ICU patients. The data were collected from patient medical records. Results: Mean age of the patients was 63.80 years (${\pm}15.21$). Body weight changes for 48 hours averaged 281.54g (${\pm}2210.48$). I&O balance for 48 hours corrected for insensible loss averaged 398.1ml. Differences ranged from 45mL to 7,535mL. In the distribution of absolute difference between body weight change and intake and output balance, only 40% of the patients were within less than 1,000 mL. Factors relating to accurate measure of intake and output were ventilation methods, respiration patterns, and edema status. Conclusion: Although mean values of weight change and I&O balance for all patients were very close, the range of differences was very wide indicating that, for many patients, intake and output is not an appropriate indicator of body fluid balance. Therefore, because of the frequency fever and/or hyperventilation, nurses need to use caution when using intake and output balance only to estimate current body fluid status for critically ill patients.