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1.
Cogn Behav Neurol ; 2024 Apr 29.
Artigo em Inglês | MEDLINE | ID: mdl-38682873

RESUMO

Individuals with acquired brain injury have reported subjective complaints of depth perception deficits, but few have undergone objective assessments to confirm these deficits. As a result, the literature currently lacks reports detailing the correlation between subjective depth perception deficits and objective stereoscopic vision deficits in individuals with acquired brain injury, particularly those cases that are characterized by a clearly defined lesion. To investigate this relationship, we recruited three individuals with acquired brain injury who experienced depth perception deficits and related difficulties in their daily lives. We had them take neurologic, ophthalmological, and neuropsychological examinations. We also had them take two types of stereoscopic vision tests: a Howard-Dolman-type stereoscopic vision test and the Topcon New Objective Stereo Test. Then, we compared the results with those of two control groups: a group with damage to the right hemisphere of the brain and a group of healthy controls. Performance on the two stereoscopic vision tests was severely impaired in the three patients. One of the patients also presented with cerebral diplopia. We identified the potential neural basis of these deficits in the cuneus and the posterior section of the superior parietal lobule, which play a role in vergence fusion and are located in the caudal region of the dorso-dorsal visual pathway, which is known to be crucial not only for visual spatial perception, but also for reaching, grasping, and making hand postures in the further course of that pathway.

2.
Psychiatry Clin Neurosci ; 78(4): 220-228, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38102849

RESUMO

AIM: Live two-way video, easily accessible from home via smartphones and other devices, is becoming a new way of providing psychiatric treatment. However, lack of evidence for real-world clinical setting effectiveness hampers its approval by medical insurance in some countries. Here, we conducted the first large-scale pragmatic, randomized controlled trial to determine the effectiveness of long-term treatment for multiple psychiatric disorders via two-way video using smartphones and other devices, which are currently the primary means of telecommunication. METHODS: This randomized controlled trial compared two-way video versus face-to-face treatment for depressive disorder, anxiety disorder, and obsessive-compulsive disorder in the subacute/maintenance phase during a 24-week period. Adult patients with the above-mentioned disorders were allocated to either a two-way video group (≥50% video sessions) or a face-to-face group (100% in-person sessions) and received standard treatment covered by public medical insurance. The primary outcome was the 36-Item Short-Form Health Survey Mental Component Summary (SF-36 MCS) score. Secondary outcomes included all-cause discontinuation, working alliance, adverse events, and the severity rating scales for each disorder. RESULTS: A total of 199 patients participated in this study. After 24 weeks of treatment, two-way video treatment was found to be noninferior to face-to-face treatment regarding SF-36 MCS score (48.50 vs 46.68, respectively; p < 0.001). There were no significant differences between the groups regarding most secondary end points, including all-cause discontinuation, treatment efficacy, and satisfaction. CONCLUSION: Two-way video treatment using smartphones and other devices, was noninferior to face-to-face treatment in real-world clinical settings. Modern telemedicine, easily accessible from home, can be used as a form of health care.


Assuntos
Depressão , Transtorno Obsessivo-Compulsivo , Adulto , Humanos , Transtornos de Ansiedade/terapia , Transtornos de Ansiedade/psicologia , Transtorno Obsessivo-Compulsivo/terapia , Transtorno Obsessivo-Compulsivo/psicologia , Ansiedade , Psicoterapia , Resultado do Tratamento
3.
J Alzheimers Dis Rep ; 7(1): 1077-1083, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37849632

RESUMO

Diagnosing neurosyphilis can be challenging and it may be misdiagnosed as behavior variant frontotemporal dementia, given its affinity for the frontal and temporal lobes. Here we present a model case, who, in his 40 s, was initially misdiagnosed with behavioral variant frontotemporal dementia based on extreme self-neglect and disinhibition over six months and frontal lobe atrophy. He was later diagnosed as neurosyphilis with positive syphilis tests in his cerebrospinal fluid. He underwent penicillin treatment and fully recovered. Relatively rapid cognitive decline, particularly if young, should prompt physicians to consider neurosyphilis as a treatable dementia, which could completely change a patient's life.

4.
Cogn Behav Neurol ; 36(4): 249-258, 2023 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-37724738

RESUMO

Individuals with childhood apraxia of speech often exhibit greater difficulty with expressive language than with receptive language. As a result, they may benefit from alternative modes of communication. Here, we present a patient with childhood apraxia of speech who used pointing as a means of communication at age 2 » years and self-made gestures at age 3½, when he had severe difficulties speaking in spite of probable normal comprehension abilities. His original gestures included not only word-level expressions, but also sentence-length ones. For example, when expressing "I am going to bed," he pointed his index finger at himself (meaning I ) and then put both his hands together near his ear ( sleep ). When trying to convey the meaning of "I enjoyed the meal and am leaving," he covered his mouth with his right hand ( delicious ), then joined both of his hands in front of himself ( finish ) and finally waved his hands ( goodbye ). These original gestures and pointing peaked at the age of 4 and then subsided and completely disappeared by the age of 7, when he was able to make himself understood to some extent with spoken words. The present case demonstrates an adaptive strategy for communication that might be an inherent competence for human beings.


Assuntos
Apraxias , Fala , Masculino , Humanos , Criança , Adulto Jovem , Adulto , Gestos , Idioma , Mãos
7.
J Alzheimers Dis ; 94(4): 1323-1330, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37458035

RESUMO

Although shadowing behavior- when one individual closely follows another- is routinely documented among patients with dementia, its mechanisms have yet to be elucidated. In particular, there have been no detailed descriptions of patients with shadowing behavior. To propose its potential backgrounds, we describe a patient with posterior cortical atrophy who exhibited prominent shadowing behavior. He also experienced severe difficulties recognizing external stimuli, including visuospatial dysfunction, several types of agnosia, difficulties in verbal comprehension, disorientation, and its associated depression. This shadowing behavior may be adaptive relative to his extreme difficulty with recognizing the world around him.


Assuntos
Agnosia , Doença de Alzheimer , Humanos , Masculino , Doença de Alzheimer/complicações , Agnosia/etiologia , Compreensão , Atrofia/complicações
8.
Am J Geriatr Psychiatry ; 31(11): 877-885, 2023 11.
Artigo em Inglês | MEDLINE | ID: mdl-37286391

RESUMO

OBJECTIVE: Although pneumonia is the leading cause of death among patients with dementia, the specific underlying causes remain unclear. In particular, the potential connection between pneumonia risk and dementia-related daily living difficulties, such as oral hygiene practice and mobility impairment, and the use of physical restraint as a management practice, has not been extensively studied. METHODS: In our retrospective study, we included 454 admissions corresponding to 336 individual patients with dementia who were admitted to a neuropsychiatric unit due to behavioral and psychological symptoms. The admissions were divided into two groups: those who developed pneumonia while hospitalized (n=62) and those who did not (n=392). We investigated differences between the two groups in terms of dementia etiology, dementia severity, physical conditions, medical complications, medication, dementia-related difficulties in daily living, and physical restraint. To control potential confounding variables, we used mixed effects logistic regression analysis to identify risk factors for pneumonia in this cohort. RESULTS: Our study found that the development of pneumonia in patients with dementia was associated with poor oral hygiene, dysphagia, and loss of consciousness. Physical restraint and mobility impairment showed a weaker, nonsignificant association with the development of pneumonia. CONCLUSIONS: Our findings suggest that pneumonia in this population may be caused by two primary factors: increased pathogenic microorganisms in the oral cavity due to poor hygiene, and an inability to clear aspirated contents due to dysphagia and loss of consciousness. Further investigation is needed to clarify the relationship between physical restraint, mobility impairment, and pneumonia in this population.


Assuntos
Transtornos de Deglutição , Demência , Pneumonia , Humanos , Higiene Bucal/efeitos adversos , Estudos Retrospectivos , Transtornos de Deglutição/etiologia , Transtornos de Deglutição/complicações , Pneumonia/complicações , Pneumonia/epidemiologia , Demência/etiologia , Demência/complicações , Inconsciência/complicações , Fatores de Risco
9.
Cogn Behav Neurol ; 36(2): 118-127, 2023 06 01.
Artigo em Inglês | MEDLINE | ID: mdl-36961317

RESUMO

A selective impairment for making hand postures that are required to use specific tools has rarely been reported in individuals with acquired brain injury, and such an impairment has not been documented at all in individuals with degenerative disorders. We describe an individual with posterior cortical atrophy and probable corticobasal syndrome who was unable to use tools because of an inability to make the proper hand posture required for each tool. This individual was, however, able to use the tools properly once her hand postures were corrected, and her ability to manipulate the tools (ie, timing, arm posture, and amplitude) was intact. Also, she had no difficulty with a test of her manipulation knowledge. Areas of hypoperfusion observed by single-photon emission computerized tomography included the anterior intraparietal sulcus in the left parietal lobe, which is an area that has been proposed to control hand postures. This selective impairment might be explained by the reasoning-based hypothesis for apraxia, which attributes hand posture errors in the absence of manipulation errors to dysfunction in one of the three independent pathways that subserve tool use, rather than the manipulation-based hypothesis for apraxia, which attributes hand posture errors to impaired manipulation knowledge. This is the first case with a degenerative disorder that revealed a selective impairment for making hand postures for tool use, which might be explained mainly by apraxia of hand postures along with visuospatial dysfunction (simultanagnosia) and/or sensory disturbance.


Assuntos
Apraxias , Degeneração Corticobasal , Doenças Neurodegenerativas , Feminino , Humanos , Apraxias/complicações , Apraxias/diagnóstico por imagem , Postura , Doenças Neurodegenerativas/complicações , Doenças Neurodegenerativas/diagnóstico por imagem , Atrofia/complicações
10.
Conscious Cogn ; 106: 103433, 2022 11.
Artigo em Inglês | MEDLINE | ID: mdl-36343602

RESUMO

To clarify the feeling of knowing a name but not being able to recall it, known as having a "tip-of-the-tongue" (TOT) experience, we proposed a TOT model consisting of three stages combining a face recognition model and autonomic sympathetic nerve activity. Since TOT increases with age, we compared two age groups: young (N = 27, M = 20.4 ± 1.5 years) and middle-aged (N = 29, M = 58.5 ± 8.0 years). Experiment 1 showed that successfully naming low-frequency common names increased the skin conductance response (SCR) value, and the time to reach the maximum SCR value was longer. Experiment 2 was a naming task for face photographs. The younger group showed higher SCR values during successfully naming, while the middle-aged group showed similar SCR values for successfully naming and experiencing TOT. Both groups had the longest time to reach maximum SCR in TOT. In this study, physiological arousal of TOT was not affected by aging.


Assuntos
Face , Nomes , Pessoa de Meia-Idade , Humanos , Adolescente , Adulto Jovem , Adulto , Idoso , Rememoração Mental/fisiologia , Envelhecimento/fisiologia , Língua/fisiologia
12.
Brain Nerve ; 74(5): 685-691, 2022 May.
Artigo em Japonês | MEDLINE | ID: mdl-35589664

RESUMO

The treatment and care for severe psychiatric symptoms associated with dementia with Lewy bodies is challenging. This is especially true for elderly patients because the use of antipsychotics is associated with an attendant mortality risk. In this article, dementia patients with Lewy bodies who presented with severe psychiatric symptoms such as Capgras syndrome (delusional misidentification syndrome), are described, and pharmacological and non-pharmacological strategies to address these symptoms are discussed. Measures to be avoided include antipsychotic administration and physical restraint, both of which often lead to medical conditions and a bedridden status. Conversely, changing antiparkinsonian drugs (levodopa rather than dopamine agonists), cholinesterase inhibitor administration, physical rehabilitation, and providing a supportive, patient-friendly environment may help improve psychiatric symptoms or maintain functionality. In some cases, electroconvulsive therapy may be effective for severe psychiatric symptoms.


Assuntos
Antipsicóticos , Síndrome de Capgras , Doença por Corpos de Lewy , Idoso , Antipsicóticos/uso terapêutico , Síndrome de Capgras/terapia , Humanos , Corpos de Lewy , Doença por Corpos de Lewy/complicações , Doença por Corpos de Lewy/diagnóstico , Doença por Corpos de Lewy/terapia
13.
J Eat Disord ; 10(1): 64, 2022 May 05.
Artigo em Inglês | MEDLINE | ID: mdl-35513879

RESUMO

BACKGROUND: Although hematological abnormalities in patients with anorexia nervosa have been documented, the mechanisms involved have not been fully clarified, especially during the refeeding period when hematological values further decrease after admission prior to improving. Here we address potential mechanisms underlying the hematological abnormalities of inpatients with anorexia nervosa during the refeeding period. METHODS: We recruited patients from 101 admissions corresponding to 55 individual patients with anorexia nervosa with severe malnutrition (body mass index, 13.4 ± 3.4) from the neuropsychiatry unit in Ashikaga Red Cross Hospital during the period from October 1999 to March 2018. We analyzed three hematological cell measures, i.e., hemoglobin, white cell count, and platelet count, to determine their levels at admission and their lowest levels during the refeeding period and calculated the percent decrease in those values from admission to the nadir levels. We analyzed each measure using a general mixed model with explanatory variables, including data upon admission and a treatment-related indicator, i.e., energy intake. RESULTS: The initial hemoglobin value of 12.1 ± 2.7 g/dl decreased by 22.3% to 9.4 ± 2.5 g/dl; the initial white cell count was 5387 ± 3474/µl, which decreased by 33.6% to 3576 ± 1440/µl; the initial platelet count of 226 ± 101 × 103/µl decreased by 24.3% to 171 ± 80 × 103/µl. All nadir levels were observed during the refeeding period from the fifth to tenth day of hospitalization. Significant correlations among the three hematological cell measures, particularly at the nadir levels, were found. Of note, 41.7% of our patients who received red blood cell transfusion during hospitalization showed normal hemoglobin levels upon admission. The anorexia nervosa restrictive type was associated with a lower nadir level of white blood cell count. Infectious complications were related to a lower nadir level of hemoglobin and a greater percent decrease in hemoglobin level as well as to the need for red blood cell transfusion. CONCLUSIONS: Nadir hematological cell measures of inpatients with anorexia nervosa might be predicted by the restrictive type and infectious complications. The anorexia nervosa restrictive type was associated with further decrease in hematological values during the refeeding period.


Deficiencies in components of the blood, such as a low red blood cell count, low white blood cell count, and low platelet numbers, are observed frequently in patients with anorexia nervosa, particularly those with severe malnutrition, and these deficiencies become manifest after hospitalization during the initial period when patients are reintroduced to food. Why this deterioration occurs even under medical care is not well understood. Here we analyzed the patient factors associated with these blood cell abnormalities. Patients with the restrictive type of anorexia nervosa, and infectious complications were more likely to have the lowest levels of hematological values during the refeeding period.

14.
J Psychiatr Res ; 151: 419-426, 2022 07.
Artigo em Inglês | MEDLINE | ID: mdl-35597225

RESUMO

BACKGROUND: Although differential diagnosis between autoimmune encephalitis and schizophrenia spectrum disorders is crucial for a good outcome, the psychiatric symptoms that distinguish these two conditions have not been identified even though psychiatric symptoms are often the main manifestation of autoimmune encephalitis. Also, there are many situations in clinical psychiatry in which laboratory testing and imaging studies are not available. Because no comparative study of the psychiatric symptoms between these two conditions has been carried out, we explored diagnostically useful psychiatric symptoms in a retrospective case-control study. METHODS: We recruited 187 inpatients with first-episode psychosis who were admitted to our psychiatric unit and categorized them into two groups: the autoimmune encephalitis group (n = 10) and the schizophrenia spectrum disorders group (n = 177). Differences in the symptoms and signs between the two groups were investigated. RESULTS: Schneider's first-rank symptoms (e.g., verbal commenting hallucinations and delusional self-experience) were observed only in the schizophrenia spectrum disorders group, whereas altered perception was found more frequently in the autoimmune encephalitis group. Functional status was worse in the autoimmune encephalitis group, and neurological and neuropsychological signs were revealed almost exclusively in this group. A history of mental illness was more frequently reported in the schizophrenia spectrum disorders group than in the autoimmune encephalitis group. CONCLUSIONS: The psychiatric symptoms, i.e., Schneider's first-rank symptoms and altered perception, together with neurological and neuropsychological signs, functional status, and past history, may help clinicians accurately differentiate these two conditions among patients with first-episode psychosis.


Assuntos
Encefalite , Transtornos Psicóticos , Esquizofrenia , Estudos de Casos e Controles , Encefalite/diagnóstico , Doença de Hashimoto , Humanos , Transtornos Psicóticos/diagnóstico , Estudos Retrospectivos , Esquizofrenia/complicações , Esquizofrenia/diagnóstico
15.
Am J Occup Ther ; 76(2)2022 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-35226063

RESUMO

IMPORTANCE: An understanding of the potential prognostic factors as they relate to the employment status of people with traumatic brain injury (TBI) is necessary so that occupational therapy practitioners can provide the most effective treatment. OBJECTIVE: To examine the impact of apathy, disinhibition, and psychiatric conditions on employment status after TBI. DESIGN: An observational study conducted from March 2015 to March 2020. SETTING: Cognitive dysfunction clinics associated with two general hospitals in Japan. PARTICIPANTS: Japanese people of working age (N = 110, ages 18-65 yr) with TBI. Outcomes and Measures: As an outcome indicator, each participant's employment status was rated on a 3-point scale (i.e., 3 = regular employment, 2 = welfare employment [employed as a person with disabilities or undergoing vocational training in the Japanese welfare employment system, for which a worker is paid under either system], 1 = unemployment). Psychiatric, neuropsychological, and physical assessments were measured as explanatory variables. The impact of various factors on employment status was investigated using linear discriminant regression analysis. RESULTS: The level of apathy, disinhibition, and incidence of psychiatric conditions after TBI, as well as age and years postinjury, were related to employment status. Conclusion and Relevance: Although this is a cross-sectional study, interventions for apathy and disinhibition, as well as management of psychiatric conditions, are recommended to help improve employment status among people with TBI. What This Article Adds: The employment status of people with TBI is related more to apathy, disinhibition, and psychiatric conditions than to intelligence, memory function, or executive function.


Assuntos
Apatia , Lesões Encefálicas Traumáticas , Adolescente , Adulto , Idoso , Estudos Transversais , Emprego , Função Executiva/fisiologia , Humanos , Pessoa de Meia-Idade , Adulto Jovem
16.
Asian J Psychiatr ; 68: 102966, 2022 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-34974375

RESUMO

How patients with pre-existing psychiatric disorders are responding to the COVID-19 pandemic remains unclear, and no comprehensive studies have yet been performed. To elucidate (1) which psychiatric disorders were exacerbated during the initial phase of the COVID-19 pandemic and (2) the contributing factors, we prospectively assessed psychiatric symptoms of 1592 psychiatric outpatients in a single-center study using the Global Assessment of Functioning (GAF) before the state of emergency was declared in Japan and during two months under the state of emergency (study period: April 8 to June 7, 2020). We conducted a chi-squared test for the relationship between psychiatric diagnostic category (ICD-10) and exacerbation. To control for confounders, we conducted a logistic regression analysis using sex, age, diagnostic category, and pre-pandemic GAF score as independent variables. Exacerbation rates of patients with mood disorders (F3) and neurotic disorders (F4) were 4.32% and 5.37%, respectively, and were significantly higher than those for patients with organic disorders (F0) and schizophrenic disorders (F2) (X2 (9, N = 1592) = 27.8, p < .01). Logistic regression analysis revealed that patients with F3 and female patients were significantly more affected than patients with other disorders or male patients, respectively (odds ratio (95% confidence interval) = 2.4 (1.2-4.6), p < .01 for F3; 3.1 (1.5-6.6), p < .01 for females). These findings suggest a need for careful management of patients with mood disorders and female psychiatric patients during a pandemic.


Assuntos
COVID-19 , Transtornos Mentais , Feminino , Humanos , Masculino , Transtornos Mentais/epidemiologia , Transtornos do Humor/epidemiologia , Pandemias , SARS-CoV-2
17.
Contemp Clin Trials ; 111: 106596, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-34653648

RESUMO

INTRODUCTION: The COVID-19 pandemic has had a profound impact on the mental health of people around the world. Anxiety related to infection, stress and stigma caused by the forced changes in daily life have reportedly increased the incidence and symptoms of depression, anxiety disorder and obsessive-compulsive disorder. Under such circumstances, telepsychiatry is gaining importance and attracting a great deal of attention. However, few large pragmatic clinical trials on the use of telepsychiatry targeting multiple psychiatric disorders have been conducted to date. METHODS: The targeted study cohort will consist of adults (>18 years) who meet the DSM-5 diagnostic criteria for either (1) depressive disorders, (2) anxiety disorders, or (3) obsessive-compulsive and related disorders. Patients will be assigned in a 1:1 ratio to either a "telepsychiatry group" (at least 50% of treatments to be conducted using telemedicine, with at least one face-to-face treatment [FTF] within six months) or an "FTF group" (all treatments to be conducted FTF, with no telemedicine). Both groups will receive the usual treatment covered by public medical insurance. The study will utilize a master protocol design in that there will be primary and secondary outcomes for the entire group regardless of diagnosis, as well as the outcomes for each individual disorder group. DISCUSSION: This study will be a non-inferiority trial to test that the treatment effect of telepsychiatry is not inferior to that of FTF alone. This study will provide useful insights into the effect of the COVID-19 pandemic on the practice of psychiatry. TRIAL REGISTRATION: jRCT1030210037, Japan Registry of Clinical Trials (jRCT).


Assuntos
COVID-19 , Psiquiatria , Telemedicina , Humanos , Japão , Pandemias , SARS-CoV-2
18.
BMC Psychiatry ; 21(1): 387, 2021 08 04.
Artigo em Inglês | MEDLINE | ID: mdl-34348698

RESUMO

BACKGROUND: Several fatal medical complications have been associated with alcohol withdrawal, such as seizure, cardiac arrhythmia, and takotsubo cardiomyopathy. However, there have been no reports on hypovolemic shock during alcohol withdrawal, although two physical signs of alcohol withdrawal, i.e., diaphoresis and fever, can lead to hypovolemia and its medical consequences. CASE PRESENTATION: We describe a patient with alcohol use disorder who exhibited hypovolemic shock and its associated acute renal failure during alcohol withdrawal with severe diaphoresis and fever even though he had consumed almost the full amount of food he was offered. Given his excessive diaphoresis and fever that were related to alcohol withdrawal, his water intake was insufficient. Infusion with extracellular fluid resolved all these medical issues. CONCLUSIONS: The increased adrenergic activity associated with alcohol withdrawal might substantially increase a patient's water-intake requirement through diaphoresis and fever and may cause severe hypovolemia and its associated medical complications.


Assuntos
Alcoolismo , Choque , Síndrome de Abstinência a Substâncias , Cardiomiopatia de Takotsubo , Alcoolismo/complicações , Humanos , Masculino , Choque/etiologia , Síndrome de Abstinência a Substâncias/complicações
19.
J Alzheimers Dis ; 83(2): 531-537, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34334406

RESUMO

Diagnosis of frontotemporal dementia is challenging in the early stages. Various psychiatric and neurological diseases are misdiagnosed as frontotemporal dementia and vice versa. Here we present a case with right temporal variant of frontotemporal dementia who presented with alcohol dependency and remarkable behavioral symptoms and was first misdiagnosed as having alcohol-related dementia. He then revealed symptoms related to right temporal variant of frontotemporal dementia, such as prosopagnosia, difficulty recognizing his housemates, loss of empathy, ritualistic behaviors, and difficulty finding and comprehending words. Retrospectively, his alcohol dependency itself was considered an early manifestation of right temporal variant of frontotemporal dementia.


Assuntos
Alcoolismo/fisiopatologia , Sintomas Comportamentais , Demência Frontotemporal/diagnóstico , Lobo Temporal/patologia , Demência Frontotemporal/psicologia , Humanos , Japão , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Prosopagnosia/etiologia , Estudos Retrospectivos
20.
J Eat Disord ; 9(1): 95, 2021 Aug 06.
Artigo em Inglês | MEDLINE | ID: mdl-34362446

RESUMO

BACKGROUND: Hypokalemia is frequently found in patients with anorexia nervosa and sometimes leads to life-threatening conditions. Although their serum potassium levels are considered to further decrease during refeeding, no previous studies have addressed actual changes in the serum potassium levels and potential mechanisms underlying hypokalemia during the refeeding period of patients with anorexia nervosa. In this study, we investigated factors associated with hypokalemia during refeeding of patients with anorexia nervosa. METHODS: We recruited 52 independent patients from 89 admissions with anorexia nervosa (body mass index, 13.0 ± 3.3) from the psychiatry unit in Ashikaga Red Cross Hospital during the period from April 2003 to March 2018 and analyzed serum potassium levels at admission. Of the 89 admissions, 66 admissions with > 1-week hospitalization were recruited to determine the lowest potassium levels during the refeeding period. We analyzed these levels with multiple linear regression analysis with explanatory variables, including data upon admission and treatment-related indicators. RESULTS: The initial serum potassium level of 3.6 ± 0.9 mg/dl decreased to 3.1 ± 0.7 mg/dl at nadir hypophosphatemia, which was observed an average of 2.5 days after admission. A lower serum potassium level at admission and a lower nadir potassium level during refeeding were associated with a lower body mass index, hypoalbuminemia, and binge-purge behavior. Similar results were obtained when the analysis included restrictive or binge-purge types as well as the independent patient group. CONCLUSIONS: Lower body mass index, hypoalbuminemia, and binge-purge behavior might be used as indicators to guide clinical approaches for controlling serum potassium levels in patients with anorexia nervosa during refeeding. Hypokalemia, low levels of serum potassium, in patients with anorexia nervosa sometimes leads to life-threatening conditions. Thus, it is of great importance to predict the risk of hypokalemia in patients with anorexia nervosa during the refeeding period. Our study found that hypokalemia in patients with anorexia nervosa during refeeding is associated with a lower body mass index and hypoalbuminemia (low levels of serum albumin), in addition to binge-purge behavior.

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