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INTRODUCTION: Insulin pump therapy can be adversely affected by interruption of insulin flow, leading to a rise in blood glucose (BG) and subsequently of blood beta-hydroxybutyrate (BHB) ketone levels. METHODS: We performed a PubMed search for English language reports (January 1982 to July 2024) estimating the rate of rise in BG and/or BHB after ≥ 60 minutes of interruption of continuous subcutaneous insulin infusion (CSII) in persons with type 1 diabetes (PwT1D). We also simulated the rise in BG in a virtual population of 100 adults with T1D following suspension of continuous subcutaneous insulin infusion. RESULTS: We identified eight relevant studies where BG and BHB (seven of these eight studies) were measured following suspension of CSII as a model for occlusion. After 60 minutes post-suspension, the mean extracted rates of rise averaged 0.62 mg/dL/min (37 mg/dL/h) for BG and 0.0038 mmol/L/min (0.20 mmol/L/h) for BHB. Mean estimated time to moderately/severely elevated BG (300/400 mg/dL) or BHB (1.6/3.0 mmol/L) was, respectively, 5.8/8.5 and 8.0/14.2 hours. The simulation model predicted moderately/severely elevated BG (300/400 mg/dL) after 9.25/12, 6.75/8.75, and 4.75/5.75 hours in the virtual subjects post-interruption with small (5th percentile), medium (50th percentile), and large (95th percentile) hyperglycemic changes. DISCUSSION: Clinical studies and a simulation model similarly predicted that, following CSII interruption, moderate/severe hyperglycemia can occur within 5-9/6-14 hours, and clinical studies predicted that moderate/severe ketonemia can occur within 7-12/13-21 hours. Patients and clinicians should be aware of this timing when considering the risks of developing metabolic complications after insulin pump occlusion.
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Type 2 diabetes mellitus has a worldwide prevalence of 10.5% in the adult population (20-79 years), and by 2045, the prevalence is expected to keep rising to one in eight adults living with diabetes. Mild cognitive impairment has a global prevalence of 19.7% in adults aged 50 years. Both conditions have shown a concerning increase in prevalence rates over the past 10 years, highlighting a growing public health challenge. Future forecasts indicate that the prevalence of dementia (no estimations done for individuals with mild cognitive impairment) is expected to nearly triple by 2050. Type 2 diabetes mellitus is a risk factor for the development of cognitive impairment, and such impairment increase the likelihood of poor glycemic/metabolic control. High phytate intake has been shown to be a protective factor against the development of cognitive impairment in observational studies. Diary phytate intake might reduce the micro- and macrovascular complications of patients with type 2 diabetes mellitus through different mechanisms. We describe the protocol of the first trial (the PHYND trial) that evaluate the effect of daily phytate supplementation over 56 weeks with a two-arm double-blind placebo-controlled study on the progression of mild cognitive impairment, cerebral iron deposition, and retinal involvement in patients with type 2 diabetes mellitus. Our hypothesis proposes that phytate, by inhibiting advanced glycation end product formation and chelating transition metals, will improve cognitive function and attenuate the progression from Mild Cognitive Impairment to dementia in individuals with type 2 diabetes mellitus and mild cognitive impairment. Additionally, we predict that phytate will reduce iron accumulation in the central nervous system, mitigate neurodegenerative changes in both the central nervous system and retina, and induce alterations in biochemical markers associated with neurodegeneration.
Subject(s)
Brain , Cognitive Dysfunction , Diabetes Mellitus, Type 2 , Diabetic Retinopathy , Dietary Supplements , Disease Progression , Iron , Phytic Acid , Adult , Aged , Female , Humans , Male , Middle Aged , Administration, Oral , Brain/metabolism , Brain/drug effects , Cognitive Dysfunction/metabolism , Cognitive Dysfunction/etiology , Cognitive Dysfunction/prevention & control , Diabetes Mellitus, Type 2/metabolism , Diabetes Mellitus, Type 2/complications , Diabetic Retinopathy/metabolism , Diabetic Retinopathy/drug therapy , Double-Blind Method , Iron/metabolism , Iron/administration & dosage , Phytic Acid/administration & dosage , Randomized Controlled Trials as TopicABSTRACT
Background: Computer simulators of human metabolism are powerful tools to design and validate new diabetes treatments. However, these platforms are often limited in the diversity of behaviors and glycemic conditions they can reproduce. Replay methodologies leverage field-collected data to create ad hoc simulation environments representative of real-life conditions. After formal validations of our method in prior publications, we demonstrate its capacity to reproduce a recent clinical trial. Methods: Using the replay methodology, an ensemble of replay simulators was generated using data from a randomized crossover clinical trial comparing the hybrid closed loop (HCL) and fully closed loop (FCL) control modalities in automated insulin delivery (AID), creating 64 subject/modality pairs. Each virtual subject was exposed to the alternate AID modality to compare the simulated versus observed glycemic outcomes. Equivalence tests were performed for time in, below, and above range (TIR, TBR, and TAR) and high and low blood glucose indices (HBGI and LBGI) considering equivalence margins corresponding to clinical significance. Results: TIR, TAR, LBGI, and HBGI showed statistical and clinical equivalence between the original and the simulated data; TBR failed the equivalence test. For example, in the HCL mode, simulated TIR was 84.89% versus an observed 84.31% (P = 0.0170, confidence interval [CI] [-3.96, 2.79]), and for FCL mode, TIR was 76.58% versus 77.41% (P = 0.0222, CI [-2.54, 4.20]). Conclusion: Clinical trial data confirm the prior in silico validation of the UVA replay method in predicting the glycemic impact of modified insulin treatments. This in vivo demonstration justifies the application of the replay method to the personalization and adaptation of treatment strategies in people with type 1 diabetes.
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INTRODUCTION: Food addiction (FA) is highly prevalent among people with obesity (PwO) and may constitute a key factor in weight loss failure or weight regain. GLP-1 analogues have been shown to act on the mesolimbic system, which is related to hedonic overeating and substance abuse. We aimed to study the effects of low doses of semaglutide on FA symptomatology and to evaluate whether the presence of FA have a negative impact on weight loss despite treatment with semaglutide. METHODS: One hundred and thirteen PwO (45.5 ± 10.2 years) were evaluated anthropometrically baseline and after four months of treatment with semaglutide. PwO were evaluated for the presence of FA by completing The Spanish version of the Yale Food Addiction Scale 2.0 questionnaire (YFAS 2.0). RESULTS: Baseline BMI and fat mass (%) were greater among PwO with FA (35.8 ± 4.5 vs 33 ± 3.9 kg/m2and 44.2 ± 6.5 vs 40.1 ± 7.9%; p = .01). After four months of treatment with semaglutide, the prevalence of FA diminished from 57.5% to 4.2% (p < .001). The percentage of weight loss (6.9 ± 12.7 vs 5.3 ± 4.6%; p = .4) and the proportion of fat mass loss (2 ± 9 vs 1.6 ± 3.1%; p = .7) were comparable between PwO with and without FA. No differences regarding side effects and treatment discontinuations were seen between the two groups. CONCLUSION: Semaglutide is an effective tool for the amelioration of FA symptomatology among PwO. Despite PwO with FA had greater basal BMI and fat mass, semaglutide showed similar results compared to PwO without FA in terms of weight and fat mass loss at short term.
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BACKGROUND: Despite advances in treatments for multiple myeloma (MM), most patients relapse and become refractory to standard drug classes including immunomodulatory drugs (IMiDs), proteasome inhibitors (PIs), and anti-CD38 antibodies. The LocoMMotion study showed poor clinical outcomes in triple-class exposed patients with relapsed/refractory MM (RRMM) treated with real-world clinical practice (RWCP) therapy. Here, we report efficacy outcomes for Spanish patients receiving RWCP treatments in the LocoMMotion study compared with the full cohort. PATIENTS AND METHODS: The prospective, noninterventional, multinational LocoMMotion study (NCT04035226) enrolled 248 patients who had received ≥ 3 prior lines of therapy (LOT), including a PI, an IMiD, and an anti-CD38 antibody, with disease progression during or after their last LOT. The primary endpoint was overall response rate (ORR). Secondary endpoints included progression-free survival (PFS) and overall survival (OS). RESULTS: Spanish patients (n = 24) had received a median of 4 prior LOT (range, 2-7). At 29.2 months median follow-up, patients had received 14 different treatment regimens used in RWCP during the study. Efficacy outcomes were consistent between the Spanish cohort and overall study population. The ORR was 29.2% (95% CI, 12.6%-51.1%). Median PFS and OS were 4.6 months (95% CI, 1.2-6.3) and 11.6 months (95% CI, 6.4-24.5), respectively. CONCLUSION: Spanish patients from the LocoMMotion study demonstrated poor outcomes in response to RWCP treatments consistent with those of the overall study population, highlighting the need for access to new and effective therapies for patients with RRMM in Spain and globally.
Subject(s)
Multiple Myeloma , Humans , Multiple Myeloma/drug therapy , Prospective Studies , Neoplasm Recurrence, Local/drug therapy , Proteasome Inhibitors/therapeutic use , Progression-Free Survival , Antineoplastic Combined Chemotherapy Protocols/adverse effectsABSTRACT
Obesity is highly prevalent in breast cancer (BC) survivors. Adipose tissue promotes inflammation, affecting recurrence, morbidity, and quality of life. This study aimed to determine the relationship of body composition parameters with the levels of C-reactive protein (CRP) and interleukin 6 (IL-6) in female BC survivors. Additionally, we evaluated the association of log-transformed serum concentrations of CRP and IL-6 with the appendicular skeletal lean mass index (ASMI). The results showed that CRP was positively associated with body fat percentage (BFP; ß adjusted = .08, 95% CI: .02-.14) in all participants, and with fat mass index (FMI; ß = .24, 95% CI: .08-.40) only in premenopausal women. IL-6 was positively associated with FMI (ß adjusted = .16, 95% CI: .03-.29), while ASMI decreased as CRP levels increased (ß adjusted = -.30, 95% CI: -.53 to -.06). Interventions to improve body composition in BC survivors should also consider the role of inflammatory markers in changes in body composition to avoid sarcopenic obesity (SO) and the risk of BC recurrence.
Subject(s)
Breast Neoplasms , Cancer Survivors , Humans , Female , Interleukin-6 , C-Reactive Protein , Breast Neoplasms/complications , Quality of Life , Neoplasm Recurrence, Local/complications , Body Composition , Obesity/complications , Survivors , Body Mass IndexABSTRACT
BACKGROUND: With automated insulin delivery (AID) systems becoming widely adopted in the management of type 1 diabetes, we have seen an increase in occurrences of rebound hypoglycemia or generated hypoglycemia induced by the controller's response to rapid glucose rises following rescue carbohydrates. Furthermore, as AID systems aim to enable complete automation of prandial control, algorithms are designed to react even more strongly to glycemic rises. This work introduces a rebound hypoglycemia prevention layer (HypoSafe) that can be easily integrated into any AID system. METHODS: HypoSafe constrains the maximum permissible insulin delivery dose based on the minimum glucose reading from the previous hour and the current glucose level. To demonstrate its efficacy, we integrated HypoSafe into the latest University of Virginia (UVA) AID system and simulated two scenarios using the 100-adult cohort of the UVA/Padova T1D simulator: a nominal case including three unannounced meals, and another case where hypoglycemia was purposely induced by an overestimated manual bolus. RESULTS: In both simulation scenarios, rebound hypoglycemia events were reduced with HypoSafe (nominal: from 39 to 0, hypo-induced: from 55 to 7) by attenuating the commanded basal (nominal: 0.27U vs. 0.04U, hypo-induced: 0.27U vs. 0.03U) and bolus (nominal: 1.02U vs. 0.05U, hypo-induced: 0.43U vs. 0.02U) within the 30-minute interval after treating a hypoglycemia event. No clinically significant changes resulted for time in the range of 70 to 180 mg/dL or above 180 mg/dL. CONCLUSION: HypoSafe was shown to be effective in reducing rebound hypoglycemia events without affecting achieved time in range when combined with an advanced AID system.
Subject(s)
Diabetes Mellitus, Type 1 , Hypoglycemia , Pancreas, Artificial , Adult , Humans , Hypoglycemic Agents/adverse effects , Pancreas, Artificial/adverse effects , Blood Glucose , Blood Glucose Self-Monitoring/methods , Insulin Infusion Systems/adverse effects , Hypoglycemia/chemically induced , Diabetes Mellitus, Type 1/drug therapy , Insulin/adverse effects , Glucose/adverse effectsABSTRACT
BACKGROUND: Automated insulin delivery (AID) has represented a breakthrough in managing type 1 diabetes (T1D), showing safe and effective glucose control extensively across the board. However, metabolic variability still poses a challenge to commercial hybrid closed-loop (HCL) solutions, whose performance depends on customizable insulin therapy profiles. In this work, we propose an Identification-Replay-Optimization (IRO) approach to optimize gradually and safely such profiles for the Control-IQ AID algorithm. METHODS: Closed-loop data are generated using the full adult cohort of the UVA/Padova T1D simulation platform in diverse glycemic scenarios. For each subject, daily records are processed and used to estimate a personalized model of the underlying insulin-glucose dynamics. Every two weeks, all identified models are integrated into an optimization procedure where daily basal and bolus profiles are adjusted so as to minimize the risks for hypo- and hyperglycemia. The proposed strategy is tested under different scenarios of metabolic and behavioral variability in order to evaluate the efficacy and convergence of the proposed strategy. Finally, glycemic metrics between cycles are compared using paired t-tests with p<0.05 as the significance threshold. RESULTS: Simulations reveal that the proposed IRO approach was able to improve glucose control over time by safely mitigating the risks for both hypo- and hyperglycemia. Furthermore, smaller changes were recommended at each cycle, indicating convergence when simulation conditions were maintained. CONCLUSIONS: The use of reliable simulation-driven tools capable of accurately reproducing field-collected data and predicting changes can substantially shorten the process of optimizing insulin therapy, adjusting it to metabolic changes and leading to improved glucose control.
Subject(s)
Diabetes Mellitus, Type 1 , Hyperglycemia , Adult , Humans , Insulin , Diabetes Mellitus, Type 1/drug therapy , Hypoglycemic Agents , Blood Glucose/metabolism , Blood Glucose Self-Monitoring , Insulin Infusion SystemsABSTRACT
Exposure to early life stress (ELS), prenatal or postnatal during childhood and adolescence, can significantly impact mental and physical health. The role of the intestinal microbiome in human health, and particularly mental health, is becoming increasingly evident. This systematic review aims to summarize the clinical data evaluating the effect of ELS on the human intestinal microbiome. The systematic review (CRD42022351092) was performed following PRISMA guidelines, with ELS considered as exposure to psychological stressors prenatally and during early life (childhood and adolescence). Thirteen articles met all inclusion criteria, and all studies reviewed found a link between ELS and the gut microbiome in both prenatal and postnatal periods. However, we failed to find consensus microbiome signatures associated with pre- or postnatal stress, or both. The inconsistency of results is likely attributed to various factors such as different experimental designs, ages examined, questionnaires, timing of sample collection and analysis methods, small population sizes, and the type of stressors. Additional studies using similar stressors and validated stress measures, as well as higher-resolution microbiome analytical approaches, are needed to draw definitive conclusions about the links between stress and the human gut microbiome.
Subject(s)
Adverse Childhood Experiences , Gastrointestinal Microbiome , Microbiota , Female , Pregnancy , Adolescent , Humans , Mental Health , Stress, PsychologicalABSTRACT
Background Functional and anatomic changes occur during pregnancy. Some of these changes are in the auditory and vestibular systems. However, there is a lack of information about the functional changes to critical structures that contribute to balance and proprioception. This study aims to evaluate the functions and shifts to the semicircular canals throughout gestation. Methodology This is a cross-sectional study. A video head impulse test (vHIT) was performed on all healthy pregnant patients with gestational periods ranging from the 20th to 40th weeks who were admitted to a maternal-fetal care unit. Vestibulo-ocular reflex (VOR) gains in the lateral, posterior, and anterior semicircular canals and gains in asymmetry were obtained. Results A significant positive relationship was observed in the right (R = 0.1064; P = 0.0110) and left (R = 0.2993; P = 0.0001) lateral semicircular canals as gestational weeks increased. Lower gains were seen at the start of the second trimester for the lateral canals. No significant gains were seen in the anterior or posterior canals throughout pregnancies until labor. No significant gains in asymmetry were detected. Conclusions Pregnant females may present vestibular changes in the semicircular lateral canals starting from the 20th week of gestation until labor. Increased gains may be associated with volumetric changes probably given by hormonal actions.
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Letter (no abstract).
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Abstract The need to analyze the relationship between procrastination, self-efficacy and emotional state lies on its impact on productivity, academic performance, and mental health. This research examined the role of academic procrastination as a mediator between self-efficacy and emotional state. A total of 531 university students (59.1% female) participated, with an average age of 21.69 years. The results identified that self-efficacy has a negative influence on procrastination. Likewise, the model was able to corroborate that self-efficacy decreases procrastination and produces a positive affective state. At the same time, a person with high self-efficacy can decrease their negative feelings; however, when procrastinating their negative feelings increase. Furthermore, this model did not vary between gender and academic semester groups, which shows that the results can be interpreted equivalently between these groups.
Resumo A necessidade de analisar a relação entre a procrastinação, a autoeficácia e o estado emocional está no seu impacto sobre a produtividade, o desempenho acadêmico e a saúde mental. Esta pesquisa teve como objetivo examinar o papel da procrastinação acadêmica como mediadora entre a autoeficácia e o estado emocional. Participaram 531 estudantes universitários (59,1% do sexo feminino), com idade média de 21,69 anos. Os resultados identificaram que a autoeficácia tem uma influência negativa sobre a procrastinação. Da mesma forma, o modelo foi capaz de corroborar que a autoeficácia diminui o comportamento procrastinador e produz um estado afetivo positivo. Ao mesmo tempo, uma pessoa com alta autoeficácia pode diminuir seu estado emocional negativo, porém, ao procrastinar, seu estado emocional negativo aumenta. Além disso, esse modelo foi invariável entre os grupos de gênero e semestre acadêmico, o que mostra que os resultados podem ser interpretados de forma equivalente entre esses grupos.
Resumen La necesidad de analizar la relación entre procrastinación, autoeficacia y estado emocional radica en su impacto en la productividad, rendimiento académico y salud mental. Esta investigación examinó el rol de la procrastinación académica como elemento mediador entre la autoeficacia y el estado emocional. Participaron 531 estudiantes universitarios (59.1% mujeres), con edad promedio de 21.69 años. En los resultados se identificó que la autoeficacia influye negativamente en la procrastinación. Asimismo, el modelo pudo corroborar que la autoeficacia disminuye la conducta procrastinadora y produce un estado afectivo positivo. Al mismo tiempo, una persona con alta autoeficacia puede disminuir su emocionalidad negativa, no obstante, cuando procrastina su estado emocional negativo incrementa. Además, este modelo fue invariante entre grupos de sexo y semestres académicos, lo que demuestra que se puede interpretar los resultados de forma equivalente entre estos grupos.
Subject(s)
Humans , Male , Female , Adult , Students , Universities , Behavior , Expressed Emotion , Self EfficacyABSTRACT
BACKGROUND: This work evaluates the accuracy and agreement between the FreeStyle Libre sensor (FSL) and an off-label converted real-time continuous glucose monitor (c-rtCGM) device consisting of the MiaoMiao transmitter and the xDrip+ application which can be coupled to the FSL. METHODS: Four weeks of glucose data were collected from 21 participants with type 1 diabetes using the c-rtCGM and FSL: two weeks with a single initial calibration (uncalibrated) and two weeks with a daily calibration (calibrated). Accuracy and agreement evaluation included mean absolute relative difference (MARD), the %20/20 rule, Bland-Altman plots, and the Consensus Error Grid analysis. RESULTS: Values reported by the c-rtCGM system compared with the FSL resulted in an overall MARD of 12.06% and 84.71% of the results falling within Consensus Error Grid Zone A when the device is calibrated. For uncalibrated devices, an overall MARD of 17.49% was obtained. Decreased accuracy was shown in the hypoglycemic range and for rates of change greater than 2 mg/dL/min. The between-device bias also incremented with increasing glucose values. CONCLUSION: Measurements recorded by the c-rtCGM were found to be accurate when compared with FSL data only when performing daily c-rtCGM device calibrations. High drops in accuracy and agreement between devices occurred when the c-rtCGM was not calibrated.
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INTRODUCTION: Bariatric surgery (BS) is effective in improving chronic joint pain (CJP). However, the long-term effects on this comorbidity are poorly understood. OBJECTIVES: To determine the prevalence of CJP in a sample of patients who had undergone BS with a minimum follow-up of 18 months. To determine whether or not there was any relationship between CJP and clinical or psychological outcomes after BS. MATERIAL AND METHODS: Cross-sectional study. The Lattinen index (LI) was used to evaluate CJP, using the cut-off point of 10 to define significant CJP (SCJP). RESULTS: Of the 110 subjects assessed, 31.2% (35/110) had SCJP. The patients with SCJP were older (57.4±13 vs 47.8±11.6 years; p<0.0001) and more time had elapsed since their BS (105.6±54.3 vs 78.5±39 months; p=0.023). The last BMI was higher in subjects with SCJP (35±5 vs 33.3±6.9kg/m2; p=0.05) and the percentage of patients who took significant regular exercise was lower (2.9% vs 68%; p<0.0001). Trauma problems after BS were more common in subjects with SCJP (61.8% vs 22.7%; p<0.0001). More patients with SCJP met depression criteria (47.1% vs 5.3%; p<0.0001) and/or were treated with antidepressants (38.2% vs 17.3%; p=0.003). Patients with SCJP reported fewer hours of sleep (6±1.4 vs 6.8±1.2h; p=0.003). CONCLUSIONS: SCJP is highly prevalent in patients who have had BS once they reach the weight plateau phase. There is an association between having SCJP and worse psychological and functional status, with potential detrimental metabolic effects.
Subject(s)
Gastric Bypass , Obesity, Morbid , Arthralgia , Cross-Sectional Studies , Gastrectomy/adverse effects , Humans , Obesity, Morbid/surgery , Weight LossABSTRACT
Specialized proresolving mediators and, in particular, 5(S), (6)R, 7-trihydroxyheptanoic acid methyl ester (BML-111) emerge as new therapeutic tools to prevent cardiac dysfunction and deleterious cardiac damage associated with myocarditis progression. The cardioprotective role of BML-111 is mainly caused by the prevention of increased oxidative stress and nuclear factor erythroid-derived 2-like 2 (NRF2) down-regulation induced by myocarditis. At the molecular level, BML-111 activates NRF2 signaling, which prevents sarcoplasmic reticulum-adenosine triphosphatase 2A down-regulation and Ca2+ mishandling, and attenuates the cardiac dysfunction and tissue damage induced by myocarditis.
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Adverse ventricular remodeling is the heart's response to damaging stimuli and is linked to heart failure and poor prognosis. Formyl-indolo [3,2-b] carbazole (FICZ) is an endogenous ligand for the aryl hydrocarbon receptor (AhR), through which it exerts pleiotropic effects including protection against inflammation, fibrosis, and oxidative stress. We evaluated the effect of AhR activation by FICZ on the adverse ventricular remodeling that occurs in the early phase of pressure overload in the murine heart induced by transverse aortic constriction (TAC). Cardiac structure and function were evaluated by cardiac magnetic resonance imaging (CMRI) before and 3 days after Sham or TAC surgery in mice treated with FICZ or with vehicle, and cardiac tissue was used for biochemical studies. CMRI analysis revealed that FICZ improved cardiac function and attenuated cardiac hypertrophy. These beneficial effects involved the inhibition of the hypertrophic calcineurin/NFAT pathway, transcriptional reduction in pro-fibrotic genes, and antioxidant effects mediated by the NRF2/NQO1 pathway. Overall, our findings provide new insight into the role of cardiac AhR signaling in the injured heart.
Subject(s)
Carbazoles , Heart Failure , Receptors, Aryl Hydrocarbon , Ventricular Remodeling , Animals , Carbazoles/pharmacology , Cardiomegaly/metabolism , Fibrosis , Heart Failure/drug therapy , Heart Failure/etiology , Heart Failure/metabolism , Ligands , Mice , Mice, Inbred C57BL , Myocytes, Cardiac/metabolism , Receptors, Aryl Hydrocarbon/genetics , Receptors, Aryl Hydrocarbon/metabolismABSTRACT
The aim of control strategies for artificial pancreas systems is to calculate the insulin doses required by a subject with type 1 diabetes to regulate blood glucose levels by reducing hyperglycemia and avoiding the induction of hypoglycemia. Several control formulations developed for this end involve a safety constraint given by the insulin on board (IOB) estimation. This constraint has the purpose of reducing hypoglycemic episodes caused by insulin stacking. However, intrapatient variability constantly changes the patient's response to insulin, and thus, an adaptive method is required to restrict the control action according to the current situation of the subject. In this work, the control action computed by an impulsive model predictive controller is modulated with a safety layer to satisfy an adaptive IOB constraint. This constraint is established with two main steps. First, upper and lower IOB bounds are generated with an interval model that accounts for parameter uncertainty, and thus, define the possible system responses. Second, the constraint is selected according to the current value of glycemia, an estimation of the plant-model mismatch, and their corresponding first and second time derivatives to anticipate the changes of both glucose levels and physiological variations. With this strategy satisfactory results were obtained in an adult cohort where random circadian variability and sensor noise were considered. A 92% time in normoglycemia was obtained, representing an increase of time in range compared to previous MPC strategies, and a reduction of time in hypoglycemia to 0% was achieved without dangerously increasing the time in hyperglycemia.
Subject(s)
Hyperglycemia , Hypoglycemia , Pancreas, Artificial , Adult , Algorithms , Humans , Hypoglycemia/prevention & control , Hypoglycemic Agents/therapeutic use , Insulin/therapeutic use , Insulin Infusion SystemsABSTRACT
BACKGROUND: Poorly organized health systems with inadequate leadership limit the development of the robust safety cultures capable of preventing consequential adverse events. Although safety culture has been studied in hospitals worldwide, the relationship between clinician perceptions about patient safety and their actual clinical practices has received little attention. Despite the need for mixed methods studies to achieve a deeper understanding of safety culture, there are few studies providing comparisons of hospitals in different countries. PURPOSE: This study compared the safety culture of hospitals from the perspective of nurses in four European countries, including Croatia, Hungary, Spain, and Sweden. DESIGN: A comparative mixed methods study with a convergent parallel design. METHODS: Data collection included a survey, participant interviews, and workplace observations. The sample was nurses working in the internal medicine, surgical, and emergency departments of two public hospitals from each country. Survey data (n = 538) was collected with the Hospital Survey on Patient Safety Culture (HSOPSC) and qualitative date was collected through 24 in-depth interviews and 147 h of non-participant observation. Survey data was analyzed descriptively and inferentially, and content analysis was used to analyze the qualitative data. RESULTS: The overall perception of safety culture for most dimensions was 'adequate' in Sweden and 'adequate' to 'poor' in the other countries with inconsistencies identified between survey and qualitative data. Although teamwork within units was the most positive dimension across countries, the qualitative data did not consistently demonstrate support, respect, and teamwork as normative attributes in Croatia and Hungary. Staffing and workload were identified as major areas for improvement across countries, although the nurse-to-patient ratios were the highest in Sweden, followed by Spain, Hungary, and Croatia. CONCLUSIONS: Despite all countries being part of the European Union, most safety culture dimensions require improvement, with few measured as good, and most deemed to be adequate to poor. Dimension level perceptions were at times incongruent across countries, as observed patient safety practices or interview perspectives were inconsistent with a positive safety culture. Differences between countries may be related to national culture or variability in health system structures permitted by the prevailing European Union health policy.
Subject(s)
Organizational Culture , Patient Safety , Attitude of Health Personnel , Cross-Sectional Studies , Hospitals, Public , Humans , Safety Management , Surveys and QuestionnairesABSTRACT
WHAT IS KNOWN ON THE SUBJECT: A serious mental illness influences sexual life and people affected have worries about their sexual health. People living with a serious mental illness can and want to participate in interventions related to sexual health. WHAT THE PAPER ADDS TO EXISTING KNOWLEDGE: People who suffer a serious mental illness are interested in maintaining an active sex life. People who suffer a serious mental illness experience rejection when they open up and they lose intimate relationships or possibilities of meeting other people because of ignorance and prejudices surrounding mental health. WHAT ARE THE IMPLICATIONS FOR PRACTICE: Mental health services must respond to this need, that is including sexual needs assessment among routine standard practices or training nurses on sexual education to allow them to advise patients and their families and friends. Health systems should promote awareness programmes and reduce the stigma surrounding mental health and sexuality. ABSTRACT: INTRODUCTION: Sexuality-related nursing care is scarce and mainly focuses on biological issues. There is also a lack of knowledge about how serious mental illnesses affect sexuality. AIM: To explain how people with a serious mental illness perceive and experience their sexuality. METHOD: A meta-synthesis was conducted to integrate qualitative studies. Four databases were used to perform the search, focused in the last ten years. Nine articles were included, and their results analysed thematically. RESULTS: Four categories were identified: "Pathologized sexuality," which explains how the disorder and treatment affect sexuality; "Not my sexuality anymore," which describes feelings emerging from the perceived limitations and the role of self-acceptance; "Learning to manage intimate relationships," which explains the desire to establish intimate personal relationships and define their meaning; and "Reconstructing my sexuality," which elucidates the influence of the environment on sexuality. DISCUSSION: Sexuality is influenced by several factors, the main ones being: the clinical complications, the side effects of drug treatment, the social support, the relationship with the health sector and stigma. IMPLICATIONS FOR PRACTICE: Having a serious mental illness affects sexuality and can provoke suffering and social isolation. Mental health services should address this issue and carry out community interventions to reduce stigma.
Subject(s)
Mental Disorders , Mental Health Services , Humans , Qualitative Research , Sexual Behavior , SexualityABSTRACT
WHAT IS KNOWN ON THE SUBJECT?: There are many international studies on CRHTTs; however, there has been little research on nurses' experiences of working with CRHTTs. Earlier studies focused on the nurses' gatekeeping role but did not explore nurses' perception of care as a construct. WHAT DOES THE PAPER ADD TO EXISTING KNOWLEDGE?: This study provides information based on mental health nurses' experiences. It explains the home environment, the therapeutic relationship and the process of mental health nursing care during a crisis. Also, the study explains nurses' satisfaction with care provided at patients' home. Unlike other studies, this study focused on nurses' experiences while providing care, rather than on nurses' general responsibilities and the services they provide. This study is the first of its kind in Spain with such a focus. WHAT ARE THE IMPLICATIONS FOR PRACTICE?: Acknowledging nurses' experiences and their perspectives about the care they provide could help shift mental health nursing paradigms from those based on biomedical models to newer perspectives found in recovery models. Furthermore, this knowledge could improve the quality of care in mental health settings due to its potential to guide nursing practices. Raising mental health care providers' awareness of mental health nurses' personal and professional care constructs would help implement support systems to meet the professional's needs. Meeting the needs of nurses related to the care they provide is likely to impact patient care positively. ABSTRACT: INTRODUCTION: Crisis resolution home treatment teams (CRHTTs) provide short-term, intensive home treatment to people experiencing mental health crises. There is limited research on nurses' experiences with CRHTTs. While earlier studies mainly focussed on mental health nurses' gatekeeping responsibilities, more investigation is needed in this field. AIM: To explore nurses' perceptions and constructions about care in CRHTT services. METHOD: A qualitative case study was employed. Ten semi-structured interviews were performed to nursing staff working in CRHTT services. RESULTS: Three main categories emerged from the data analysis: nurses' perspectives of the care provided, nursing setting of care at home and nursing care plan at home. DISCUSSIONS: Findings revealed that nurses experienced greater satisfaction providing care in the home settings, and therefore, it positively impacted the quality of care and reduced patient's stigma. This study also relates the value of developing care plans centred on patients' environments increasing Mental Health Nursing (MHN) work satisfaction. IMPLICATIONS FOR PRACTICE: Knowledge of the intrinsic experiences of care provided by nurses in CRHTTs may help facilitate the development of the nursing role in CRHTT by improving understanding of care in mental health settings.