scholarly journals CarbMetSim:A discrete-event simulator for carbohydrate metabolism in humans

2018 ◽  
Author(s):  
Mukul Goyal ◽  
Buket Aydas ◽  
Husam Ghazaleh ◽  
Sanjay Rajasekharan

AbstractThis paper describesCarbMetSim, adiscrete-eventsimulator that tracks the blood glucose level of a person in response to a timed sequence of diet and exercise activities.CarbMetSimimplements broader aspects of carbohydrate metabolism in human beings with the objective of capturing the average impact of various diet/exercise activities on the blood glucose level. Key organs (stomach, intestine, portal vein, liver, kidney, muscles, adipose tissue, brain and heart) are implemented to the extent necessary to capture their impact on the production and consumption of glucose. Key metabolic pathways (glucose oxidation, glycolysisandgluconeogenesis) are accounted for in the operation of different organs. The impact of insulin and insulin resistance on the operation of various organs and pathways is captured in accordance with published research.CarbMetSimprovides broad flexibility to configure the insulin production ability, the average flux along various metabolic pathways and the impact of insulin resistance on different aspects of carbohydrate metabolism. The simulator does not yet have a detailed implementation of protein and lipid metabolism.

2019 ◽  
Vol 16 (1) ◽  
pp. 40-46
Author(s):  
Rui Guo ◽  
Ruiqi Chen ◽  
Chao You ◽  
Lu Ma ◽  
Hao Li ◽  
...  

Background and Purpose: Hyperglycemia is reported to be associated with poor outcome in patients with spontaneous Intracerebral Hemorrhage (ICH), but the association between blood glucose level and outcomes in Primary Intraventricular Hemorrhage (PIVH) remains unclear. We sought to identify the parameters associated with admission hyperglycemia and analyze the impact of hyperglycemia on clinical outcome in patients with PIVH. Methods: Patients admitted to Department of Neurosurgery, West China Hospital with PIVH between 2010 and 2016 were retrospectively included in our study. Clinical, radiographic, and laboratory data were collected. Univariate and multivariate logistic regression analyses were used to identify independent predictors of poor outcomes. Results: One hundred and seventy patients were included in the analysis. Mean admission blood glucose level was 7.78±2.73 mmol/L and 10 patients (5.9%) had a history of diabetes mellitus. History of diabetes mellitus (P = 0.01; Odds Ratio [OR], 9.10; 95% Confidence Interval [CI], 1.64 to 50.54) was independent predictor of admission critical hyperglycemia defined at 8.17 mmol/L. Patients with admission critical hyperglycemia poorer outcome at discharge (P < 0.001) and 90 days (P < 0.001). After adjustment, admission blood glucose was significantly associated with discharge (P = 0.01; OR, 1.30; 95% CI, 1.06 to 1.59) and 90-day poor outcomes (P = 0.03; OR, 1.27; 95% CI, 1.03 to 1.58), as well as mortality at 90 days (P = 0.005; OR, 1.41; 95% CI, 1.11 to 1.78). In addition, admission critical hyperglycemia showed significantly increased the incidence rate of pneumonia in PIVH (P = 0.02; OR, 6.04; 95% CI 1.27 to 28.80) even after adjusting for the confounders. Conclusion: Admission blood glucose after PIVH is associated with discharge and 90-day poor outcomes, as well as mortality at 90 days. Admission hyperglycemia significantly increases the incidence rate of pneumonia in PIVH.


2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Pouran Hajian ◽  
Minoo Shabani ◽  
Elham Khanlarzadeh ◽  
Mahshid Nikooseresht

Background. Prolonged preoperative fasting is one of the concerns of pediatricians and anesthesiologists in pediatric surgery. The aim of this study was to assess the impact of preoperative fasting duration on blood glucose and hemodynamics in children. Methods. This cross-sectional study was conducted on 50 children who were between the ages of 3 and 12 years in Besat Hospital, Hamedan, Iran. The time of the last solid and liquid meal taken by child were recorded based on interview with the parents. The first blood glucose test was obtained in the operation room, and the second test was performed 20 minutes after induction of anesthesia by glucometer. Systolic blood pressure (SBP), mean arterial pressure (MAP), and heart rate (HR) were recorded before anesthesia induction and in five-minute intervals in the first 20 minutes of surgery. Results. The mean age of the children was 6.63 (SD 1.85) years. Mean blood glucose 20 minutes after surgery was 101.17 (SD 92) mg/dl, which was significantly higher than the baseline values (87.66 (SD 11.84) mg/dl) (P<0.001). The comparison of mean blood glucose level between groups of fasting with different duration for solids (<12 hours and >12 hours) and for liquids (<6 hours and >6 hours) revealed no significant difference in either groups (P>0.05). No significant correlation was observed between blood glucose level at the induction of anesthesia with weight and age (P>0.05). There was a significantly negative correlation between duration of fasting for liquids and SBP (P>0.05). Conclusion. Prolonged preoperative fasting cannot affect blood glucose in children; however, maybe it has impact on systolic blood pressure.


1951 ◽  
Vol 2 (2) ◽  
pp. 132 ◽  
Author(s):  
RL Reid

The response of sheep to intravenous insulin administration in doses of 0.5-10.0 units per kg. body weight has been studied in detail. The rate of fall of blood glucose following insulin injection is considerably slower than in non-ruminants. Increasing the dosage of insulin from 1 to 5 units per kg., and sometimes to 10 units per kg., does not increase the depth of hypoglycaemia, but merely increases its duration. The blood-glucose level following such doses of insulin falls, in most sheep, to a level of 5-10 mg. per cent. and remains relatively constant until it returns to normal. At these levels, severe hypoglycaemic signs were never observed, even when the hypoglycaemia was of several hours' duration. These results are compared with those obtained by others on cattle and goats and it is suggested that the response of sheep to insulin is similar in all respects to that shown by cattle and goats. From a consideration of the experimental results, it is suggested that the differences in response to insulin between ruminants and non-ruminants may be due to fundamental differences in endocrine balance which, in turn, are conditioned by differences in intermediary metabolism.


Author(s):  
E. Harianja ◽  
Anik Widijanti ◽  
Putu Moda Arsana ◽  
K. Handono

Aging is a syndrome of progressive, universal and irreversible alterations. Endocrinology alterations in aging consist of insulin resistance, hyperinsulinemia, increase of hydrogen peroxide and glucose blood level. At the beginning of aging process the Pancreaticcellsproducemoreinsulininorderiskeepbloodglucosewithinnormallevel.Butthepersistentofhyperglycemiaconditioncausedthepancreatic-cellsunabletoproduceadequateinsulinduetointernalfactorsorexternalfactors.Asthisconditionprogress,wouldbedisturbedfastingandpost-prandialbloodglucose(hyperglicemia).Besidesinsulinresistance,freeradicalsalsoincreasedasaconsequenceoffailurecompensationofcellsinthebody.TheaimofthisstudyistodeterminethatintermittentanddailycalorierestrictioninoldmaleWistarratscanreduceserumhydrogenperoxide,andbloodglucoselevel.Themethodofthisstudywasanexperimentalstudywithpost-testcontrolgroupdesign.TwentyfourmaleWistarratsabout12monthsold,weredividedintofourequalgroupsandeachgroupcontainsixrats:(i)adlibitumfed(control),(ii)2-1intermittentwith2daysfedand1dayfast,(iii)1-1intermittentwith1dayfedand1dayfast,and(iv)40%continuouscalorierestrictioneveryday.Independentvariableinthisstudywascalorieintakeandbodyweight.Dependentvariableswerehydrogenperoxideleveland.Bloodglucoselevel.Thedifferenceofeachgroupwasanalyzedwithone way ANOVA and the least significant difference was analyzed by the use post hoc tests, using p < 0.05. The result of this study for hydrogen peroxide and blood glucose level in control group with experimental groups were p 0.000 and p 0.001. There was positivecorrelation between hydrogen peroxide level and blood glucose level r 0.791. We conclude that calorie restriction decrease hydrogenperoxide level and as well as regulating of blood glucose level. The best one of this method is 40% calorie restriction.


2021 ◽  
Vol 6 (1) ◽  
pp. 11
Author(s):  
Shofihar Sinansari ◽  
Vitas Atmadi Prakoso ◽  
Erma Primanita Hayuningtyas ◽  
Bambang Priadi ◽  
Sri Sundari ◽  
...  

<strong>Effect of Stocking Density on Oxygen Consumption and Stress Response in Crescent Betta (<em>Betta imbellis</em>)</strong>. Stocking density is one of the determinant parameters for fish growth optimization in aquaculture systems due to its relationship with fish metabolism. Information about the impact of different stocking densities on crescent betta (<em>Betta imbellis</em>) metabolism was not available yet. This study was aimed to analyze the effect of stocking density on oxygen consumption, critical oxygen level, and stress responses in crescent betta.The study was carried out under three different stocking density treatments: 5, 10, and 15 fish/L with three replications using 2.74 ± 0.23 cm total length and 0.22 ± 0.05 g body weight tested fishes.The parameters observed were oxygen consumption, ventilation rate, blood glucose level, cortisol, and critical oxygen level. The result showed that the highest oxygen consumption was found at 5 fish/L stocking density treatment (3.01 ± 0.28 mg O<sub>2</sub>/g/h), which was significantly different from 10 fish/L (1.01 ± 0.21 mg O<sub>2</sub>/g/h) and 15 fish/L (0.92 ± 0.08 mg O<sub>2</sub>/g/h) stocking density treatments. Oxygen consumptions under hypoxic condition was not significantly different compared to normoxic condition.The ventilation rate tends to increase significantly along with the increasing of stocking densities. Critical oxygen levels were not significantly different among the treatments,with the value of 3.31 ± 0.65 mg/L, 3.14 ± 0.29 mg/L, and 2.83 ± 0.19 mg/L for stocking density of 5, 10, and 15 fish/L, respectively. The blood glucose level at 15 fish/L stocking density was significantly higher than others, whereas the cortisol levels was not significantly different among the treatments. The results of this study provided information that the increasing stocking density of cressent betta will decrease their metabolism activity and increase ventilation rate. However, the increase of ventilation rate was negatively correlated with oxygen consumption per breath at higher stocking densities due to decrease in fish activity; and higher stocking densities will decrease oxygen consumption. Based on the results, it can be concluded that the ideal stocking density for crescent betta is 5 fish/L. The increasing of stocking density will decrease oxygen consumption rates and increase the stress level of crescent betta.


Sign in / Sign up

Export Citation Format

Share Document