Mild Hyponatremia Research Articles

12265 Isolated Adrenocorticotropic Hormone Deficiency In The Setting Of Anti-PD1 Immunotherapy

Abstract Disclosure: J. Poncelet: None. Q. Wang: None. A.J. Montero: Advisory Board Member; Self; AstraZeneca, Gilead. Other; Self; Medical Advisor for Paragon Infusion Services. L. Tranchito: None. Isolated Adrenocorticotropic Hormone Deficiency in the Setting of Anti-PD1 Immunotherapy Introduction: Immune checkpoint inhibitors have been associated with endocrine immune-related adverse events, such as secondary adrenal insufficiency with isolated ACTH deficiency in rare instances. Case Presentations: We present two different cases of isolated ACTH deficiency (IAD) while on anti-PD1 therapy with pembrolizumab. Patient A is a 66-year-old woman with history of tobacco use, hypertension, and COPD diagnosed with stage IV lung adenocarcinoma. After completing 15 cycles of pembrolizumab, she reported symptoms of fatigue, weakness, lightheadedness, and was subsequently admitted to the hospital for symptomatic hyponatremia. Lab workup revealed a morning cortisol level of 0.6 ug/dL (n2.5-20 ug/dL) and ACTH <1.5 pg/mL (n7.2-63.3 pg/mL), both of which had previously been normal. Her TSH was mildly elevated with a normal free T4. Her FSH, LH, prolactin, and IGF levels were normal as was MRI of the pituitary. She therefore was diagnosed with IAD and started physiologic steroid replacement therapy with hydrocortisone with subsequent symptomatic improvement and normalization of her serum sodium. Patient B is a 60-year-old woman with a history of osteoporosis, aortic stenosis, and stage II triple negative breast cancer treated with neoadjuvant chemotherapy and pembrolizumab. Two months after starting immunotherapy, she presented to her oncology office with symptoms of fatigue, poor appetite, body aches, and dizziness. Her labs revealed mild hyponatremia, cortisol of 0.9 ug/dL (n2.5-20 ug/dL) and ACTH <1.5 pg/mL (n7.2-63.3 pg/mL). TSH, LH, FSH, and prolactin levels were normal. She started physiologic steroid replacement therapy with hydrocortisone for IAD, which led to improvement in her symptoms. Both patients continue pembrolizumab. Conclusions: Immune-related adverse events affecting endocrine pathways have been reported with immune checkpoint inhibitors. There is no method to predict which patients may be affected, and no guidelines exist on when or how often to monitor hormone levels in these patients. Importantly, patients can continue immune checkpoint inhibitors despite IAD if controlled by hormone replacement, though ACTH recovery should not be expected[1]. Recognition of symptoms can prompt earlier evaluation for secondary adrenal insufficiency and provide greater benefit to patients. 1.Schneider BJ, Naidoo J, Santomasso BD, et al. Management of Immune-Related Adverse Events in Patients Treated With Immune Checkpoint Inhibitor Therapy: ASCO Guideline Update [published correction appears in J Clin Oncol. 2022 Jan 20;40(3):315]. J Clin Oncol. 2021;39(36):4073-4126. doi:10.1200/JCO.21.01440 Presentation: 6/1/2024

Mild Thiazide-Induced Hyponatremia in Hypertensive Patients Is Associated with Increased Mortality Risk

Mild Thiazide-Induced Hyponatremia in Hypertensive Patients Is Associated with Increased Mortality Risk

Prevalence of hyponatremia among medically hospitalized patients and associated outcomes: a retrospective cohort study.

Hyponatremia is a common electrolyte disturbance among hospitalized patients and is linked to increased mortality as well as poor outcomes. Study the prevalence of hyponatremia among medically admitted patients and the outcomes associated with hyponatremia. Retrospective cohort. Medical ward at tertiary hospital setting. The study included adult (≥18 years) hospitalized patients in general medical wards. Three readings of serum sodium level were taken (initial sodium level, nadir during admission, and before discharge). The sample size of 350 was determined based on a presumed 35% incidence of hyponatremia among hospitalized patients, with a 5% error margin. The prevalence of hyponatremia among medically hospitalized patients and association with health outcomes including length of hospital stay, inpatient mortality, 90-days readmission and 1-year mortality. In this study, 736 patients met the inclusion criteria. Of these, 377 (51.2%) had hyponatremia on admission, increasing to 562 (76.35%) during hospitalization. Mild hyponatremia was observed in 49.6% (n=365), moderate in 13.6% (n=100), and severe in 13.2% (n=97). Severe hyponatremia patients were significantly older (P<.01), predominantly female (P=.014), and had lower serum magnesium and albumin levels (P<.01). Hypertension, ischemic heart disease, heart failure, and diabetes were more prevalent in severe hyponatremia cases (P<.01, P<.01, P=.045, P<.01, respectively). Hospital stays were significantly shorter for patients with normal sodium levels (P<.01). Patients with severe hyponatremia had a shorter time for first hospital readmission (HR=0.80, P<.01 [95% CI; 0.69-0.94]). Hyponatremia was prevalent among medically hospitalized patients and more common among old patients, women, and patients with comorbidities. Hyponatremia was associated with increased length of stay in hospital and increased risk of 90-day re-admission. Single-centre design and retrospective nature.

Women have a higher risk of hospital admission associated with hyponatremia than men while using diuretics.

Hyponatremia is a common electrolyte disturbance and known adverse drug reaction of diuretics. Women tend to be more susceptible for diuretic associated hyponatremia. The aim of this study was to find more evidence whether women have a higher risk of diuretic associated hyponatremia than men measured at hospital admission for specific diuretic groups and whether there is a sex difference in risk of severity of hyponatremia. All patients using a diuretic and admitted for any reason to Tergooi MC and Haga Teaching hospital in the Netherlands between the 1st of January 2017 and the 31st of December 2021, with recorded sodium levels at admission were included in this study. Cases were defined as patients with a sodium level <135mmol/L, while control patients had a sodium level ≥135mmol/L at admission. Logistic regression analysis was used to calculate odds ratios (OR) with 95% CIs for women versus men and adjusted for potential confounding covariables (age, body mass index, potassium serum level, systolic and diastolic blood pressure, estimated glomerular filtration rate, number of diuretics, comedications and comorbidities). Stratified analyses were conducted for specific diuretic groups (thiazides, loop diuretics and aldosterone antagonists), and adjusted for dose. Furthermore, stratified analyses were performed by severity of hyponatremia (severe: <125mmol/L), mild: 125-134mmol/L). A total of 2,506 patients (50.0% women) were included, of which 516 had hyponatremia at admission (20.6%, 56.2% women). Women had a statistically significantly higher risk for hyponatremia at admission than men (OR 1.37; 95% CI 1.12-1.66) and after adjustment for potential risk factors (ORadj 1.55; 95% CI 1.22-1.98). Stratified analyses showed increased odds ratios for thiazides (ORadj 1.35; 95% CI 1.00-1.83) and loop diuretics (ORadj 1.62; 95% CI 1.19-2.19) among women. Use of aldosterone antagonists was also increased but not statistically significant (ORadj 1.15; 95% CI 0.73-1.81). Women had a statistically higher risk to develop mild and severe hyponatremia than men (ORadj 1.36; 95% CI 1.10-1.68 and ORadj 1.96; 95%CI 1.04-3.68, respectively). Women have a higher risk of a hospital admission associated with hyponatremia while using diuretics than men. Further research is necessary to provide sex-specific recommendations.

Postoperative Hyponatremia After Endoscopic Endonasal Resection of Pituitary Adenomas: Historical Complication Rates and Risk Factors

Hyponatremia is a common complication following endoscopic endonasal resection (EER) of pituitary adenomas. We report a single-center, multisurgeon study detailing baseline clinical data, outcomes, and factors associated with postoperative hyponatremia. This was a retrospective cohort study of patients undergoing EER for pituitary adenoma at Tufts Medical Center. Most procedures were performed by the senior author (C.B.H.). Cases were included if at least 1 postoperative sodium value was available and pathology confirmed pituitary adenoma. Hyponatremia was defined as a postoperative sodium level <135 mEq/L. A total of 272 patients underwent 310 EER procedures that met the study inclusion criteria. The mean patient age was 53.3 years, and mean tumor size was 18.8 mm. Postoperative hyponatremia occurred in 12.6% of cases, with 3.6% developing hyponatremia prior to discharge. Lower preoperative sodium level was associated with an increased risk of developing any postoperative hyponatremia. Older age, prolactinoma pathology, and use of selective serotonin reuptake inhibitors were associated with moderate to severe hyponatremia (≤129 mEq/L), and lower preoperative sodium was associated with mild hyponatremia (130-134 mEq/L). Hyponatremia-related readmissions within 30 days occurred in 3.9% of patients. Both African-American race and postoperative hyponatremia were associated with an increased risk of 30-day readmission. The mean nadir sodium for hyponatremic patients was 129.9 mEq/L. Growth hormone-secreting pathology was associated with lower postoperative nadir sodium, whereas higher preoperative sodium was associated with higher postoperative nadir sodium. Hyponatremia is a common postoperative complication of EER for pituitary lesions that can cause significant morbidity, increased readmissions, and increased healthcare costs.

Hyponatraemia-treatment standard 2024.

Hyponatraemia is the most common electrolyte disorder in hospital patients associated with increased morbidity, mortality, hospital stay and financial burden. The speed of a correction with 3% sodium chloride as a 100- to 150-ml intravenous bolus or continuous infusion depends on the severity and persistence of the symptoms and needs frequent biochemical monitoring. The rapid intermittent administration of hypertonic saline is preferred for treatment of symptomatic hyponatraemia. In asymptomatic mild hyponatraemia, an adequate solute intake with an initial fluid restriction (FR) of 500ml/day adjusted according to the serum sodium (sNa) levels is preferred. Almost half of the syndrome of inappropriate antidiuretic hormone (SIADH) patients do not respond to FR as first-line therapy. At present, urea and tolvaptan are considered the most effective second-line therapies in SIADH. However, the evidence for guidance on the choice of second-line therapy of hypotonic hyponatraemia is lacking. Oral urea is considered to be a very effective and safe treatment. Mild and asymptomatic hyponatraemia is treated with adequate solute intake (salt and protein) and initial FR with adjustments based on sNa levels. Specific treatment with vaptans may be considered in either euvolaemic or hypervolaemic patients with high ADH activity. In order to ensure optimal patient outcome, close monitoring and readiness for administration of either hypotonic fluids or desmopressin may be crucial in the decision-making process for specific treatment and eventual overcorrection consequences. According to the guidelines, gradual correction and clinical evaluation is preferable over rapid normalization of sNa towards the laboratory reference ranges.

Short-Term Outcomes of Patients With Hyponatremia Presenting to the Emergency Department: An Observational Study.

Hyponatremia is the predominant electrolyte imbalance disorder in the emergency department. It can manifest with a diverse array of symptoms, ranging from non-specific and moderate to severe and even life-threatening. There is a scarcity of literature addressing the clinical characteristics and prognosis of patients with hyponatremia presenting to the emergency department in the western part of Rajasthan. The objective of this study was to investigate the impact of hyponatremia on the outcomes of patients presenting to the emergency department. In this prospective, cross-sectional, observational study, 200 patients aged more than 18 years who presented to the emergency department with serum sodium < 135 mEq/l were included. The triage of patientswas determined by their primary complaints. The primary outcome was to study the clinical profile of patients with hyponatremia presenting to the emergency department. The secondary outcomes were to examine the etiology, i.e., hypovolemic, euvolemic, or hypervolemic, and the outcome of patients on the 7th day (patient admitted to the ward or intensive care unit) and the 28th day (discharged or death) with hyponatremia presenting to the emergency department. The clinical status of the patients was noted by telephonic follow-up in case they were not admitted for this period. Out of 200 patients, 66 (33%) had hypovolemic, 96 (48%) had euvolemic, and 38 (19%) had hypervolemic hyponatremia. We observed that seizures (84.2%), confusion (56%), and coma (77.7%) were the most common clinical features of patients with severe hyponatremia in the emergency, which was statistically significant than mild and moderate hyponatremia (p = 0.03, 0.023, and 0.029, respectively). On the 7th day of hospitalization, out of 181 (90.5%) admissions in the ward, 116 (64.08%) had severe hyponatremia, and out of 19 (9.5%) ICU admissions, 13 (68.4%) had severe hyponatremia. Death was seen in five (2.5%) patients, one (20%) in moderateand four (80%) in severe hyponatremia cases. Most cases of hyponatremia in this study were euvolemic. Most patientsexperienced severe hyponatremia, and seizures, confusion, and coma were the most prevalent symptoms. These disorders must be recognized early to properly diagnose and treat hyponatremia and prevent its morbidity and death.

Predictive factors of hyponatremia in subarachnoid hemorrhage and outcomes

Background &amp; Objective: The prevalence of hyponatremia in subarachnoid hemorrhage (SAH) was 30-55%. There was lack of evidence about predictive factors and clinical outcomes of hyponatremia in SAH patients. This study aimed to evaluate factors associated with hyponatremia following SAH and to review the clinical outcomes and treatment of hyponatremia in SAH patients. Method: This is a retrospective cohort study. SAH patients presented during January 2013 to January 2019 were reviewed. They were divided into 2 groups: SAH with normonatremia and SAH with hyponatremia. Clinical data, laboratory profile, aneurysm characteristics and clinical outcomes were recorded and analyzed. Result: A total number of 278 patients with SAH were included, 139 patients in each group. The populations were female 66% with mean age of 56 years old and mean serum sodium (Na) level 132 mmol/L. Aneurysm location associated with hyponatremia; anterior cerebral artery (ACA) (OR 4.2, 95%CI 1.4-13.0, p-value 0.009) and posterior cerebral artery (PCA) (OR 3.7, 95%CI 1.2-11.5, p-value 0.017). Aneurysms clipping procedure was also associated with hyponatremia (OR 4.0, 95%CI 1.8-8.8, p-value &lt; 0.001). Conclusion: ACA and PCA aneurysms and aneurysms clipping procedure were risk factors for hyponatremia following SAH. Mild hyponatremia was not associated with morbidity and mortality in SAH patients.

A schedule for tapering glucocorticoid treatment in patients with severe SARS-CoV 2 infection can prevent acute adrenal insufficiency in the geriatric population

Objective and designGlucocorticoids (GCs) have been widely used in symptomatic patients for the treatment of COVID-19. The risk for adrenal insufficiency must be considered after GC withdrawal given that it is a life-threatening condition if left unrecognized and untreated. Our study aimed to diagnose adrenal insufficiency early on through a GC reduction schedule in patients with COVID-19 infection.Patients and measurementsFrom November 2021 to May 2022, 233 patients were admitted to the Geriatric Division of the University Hospital of Padova with COVID-19 infection. A total of 122 patients were treated with dexamethasone, after which the GC tapering was performed according to a structured schedule. It consists of step-by-step GC tapering with prednisone, from 25 mg to 2.5 mg over 2 weeks. Morning serum sodium, potassium, and cortisol levels were assessed 3 days after the last dose of prednisone.ResultsAt the end of GC withdrawal, no adrenal crisis or signs/symptoms of acute adrenal insufficiency were reported. Median serum cortisol, sodium, and potassium levels after GC discontinuation were, respectively, 427 nmol/L, 140 nmol/L, and 4 nmol/L (interquartile range 395–479, 138–142, and 3.7–4.3). A morning serum cortisol level below the selected threshold of 270 nmol/L was observed in two asymptomatic cases (respectively, 173 and 239 nmol/L, reference range 138–690 nmol/L). Mild hyponatremia (serum sodium 132 to 134 nmol/L, reference range 135–145 nmol/L) was detected in five patients, without being related to cortisol levels.ConclusionsA structured schedule for the tapering of GC treatment used in patients with severe COVID-19 can reduce the risk of adrenal crisis and acute adrenal insufficiency.

Frequency and outcome of sodium disturbances in children admitted with acute watery diarrhea in a tertiary hospital of Bangladesh

Background: Acute watery diarrhea (AWD) is one of the common causes of hospital admissions in pediatric age group. Majority of children with dehydration suffer from different electrolyte abnormalities which needs to be identified and treated. Objectives: To investigate the frequency and outcome of sodium disturbances in AWD among children admitted in a tertiary hospital in Bangladesh. Method: In this prospective observational study, 121 children of 2 months to 5 years of age admitted in the Department of Pediatrics, Chittagong Medical College Hospital with AWD were included. Clinical features and sodium levels on admission were recorded. Patients were followed up during their hospital stay to record the outcomes. Children were grouped in hyponatremia (serum sodium &lt;135mmol/l), hypernatremia (serum sodium &gt;145mmol/l) and normonatremia (serum sodium 135–145mmol/l) and compared. Results: Of the 121 children, 38.0% and 62.0% had moderate and severe dehydration, respectively. The majority (58.7%) had normal sodium levels. Sodium disturbances was found in 41.3% cases. There were 26.4% cases of hypernatremia and 14.9% cases of hyponatremia among them. Out of 18 hyponatremic patients, 77.8% had mild hyponatremia and the rest 22.2% had moderate hyponatremia. Among 32 hypernatremic children, 62.4% had mild, 18.8% had moderate and 18.8% had severe hypernatremia. The case fatality rate was 2.6% and all of them had hypernatremic dehydration at admission. Conclusion: Sodium disturbances particularly hypernatremia is more frequent and is associated with high case fatality rate among children hospitalized with acute watery diarrhoea. BANGLADESH J CHILD HEALTH 2022; VOL 46 (3) : 110-114

Mild hyponatremia is not associated with degradation of trabecular bone microarchitecture despite bone mass loss

Mild hyponatremia is not associated with degradation of trabecular bone microarchitecture despite bone mass loss

Prospective study of post-operative hyponatremia in patients undergoing lower-limb orthopedic surgery

Prospective study of post-operative hyponatremia in patients undergoing lower-limb orthopedic surgery

Mild hyponatremia is not associated with degradation of trabecular bone microarchitecture despite bone mass loss.

Hyponatremia is associated with increased risk of osteoporosis and fractures. The impact of hyponatremia on non-invasive indices of bone quality, however, is unknown. To evaluate whether trabecular bone microarchitecture, assessed non-invasively by trabecular bone score (TBS), is altered in patients with hyponatremia. We conducted a cross-sectional analysis of the population-based 2005-2008 cycles of the National Health and Nutrition Examination Survey (NHANES), in which TBS measurement was performed. The main outcome measures were TBS values and bone mineral density (BMD) T-scores at the lumbar spine, total hip and femoral neck. A total of 4204 subjects aged 50 years or older were included (4041 normonatremic, 163 hyponatremic - 90.8% with mild hyponatremia). Univariate analyses did not show any difference in TBS between patients with and without hyponatremia (1.308 ± 0.145 vs 1.311 ± 0.141, p = 0.806). Hyponatremic subjects had lower BMD T-score at total hip (-0.70 ± 1.46 vs -0.13 ± 1.32, p < 0.001) and femoral neck (-1.11 ± 1.26 vs -0.72 ± 1.14, p = 0.004), while no difference was observed at lumbar spine (-0.27 ± 1.63 vs -0.31 ± 1.51, p = 0.772). After adjustment for relevant confounders, hyponatremia was confirmed as an independent predictor of lower BMD T-score at the total hip (β=-0.20, 95%CI:[-0.39, -0.02], p = 0.029), while the significance was lost at the femoral neck (p = 0.308). Again, no association between hyponatremia and lumbar spine BMD (p = 0.236) or TBS (p = 0.346) was observed. Hyponatremia, at least in mild forms, is not associated with a degradation of trabecular microarchitecture, assessed non-invasively by TBS. An independent association between hyponatremia and loss of bone mass is confirmed, particularly at the total hip.

Association Between Early Hyponatremia and Clinical Outcomes in Critically Ill Patients: A Retrospective Cohort Study.

Hyponatremia, frequently encountered in intensive care (ICU) settings, plays a critical role in shaping patient outcomes. Despite its prevalence, contemporary research into its newly classified severity categories and their implications on mortality, renal function, and length of stay remains limited. This study aims to fill this gap by examining the impact of hyponatremia severity on these critical outcomes. A retrospective analysis of ICU patients aged >18 years who were admitted between March 2019 and December 2022 was conducted at Hamamatsu University Hospital, Shizuoka, Japan. Patients who were readmitted or had incomplete data were excluded. Hyponatremia was categorized as mild (130-135 mmol/L), moderate (125-129 mmol/L), or severe (<125 mmol/L), following the criteria set by the European Society of Intensive Care Medicine. This classification utilized thelowest sodium concentration within 24 hours of ICU admission. The outcomes were in-hospital mortality, ICU mortality, newly implemented renal replacement therapy (RRT), and length of hospital and ICU stay. Outcomes were analyzed using multivariable logistic and linear regression models, adjusting for relevant covariates including age, sex, Acute Physiology and Chronic Health Evaluation (APACHE) III scores, and the use of mechanical ventilation. Of the 3,538 patients analyzed, 1,072 (30.3%) experienced hyponatremia: 894 (25.3%) mild, 144 (4.1%) moderate, and 34 (1.0%) severe. Multivariable analysis revealed no significant association between hyponatremia severity and in-hospital mortality rates across normonatremia (3.8%), mild (5.2%), moderate (11.8%), and severe (23.5%) groups, nor with ICU mortality. However, compared to normonatremia, moderate and severe hyponatremia were associated with increased RRT initiation (odds ratios = 3.83 and 6.36, respectively) and prolonged hospital stay (mean difference = 7.06 and 9.66 days, respectively), and ICU stays (mean difference, 1.02 and 2.70 days, respectively). Mild hyponatremia was not significantly associated with RRT or length of stay. Moderate-to-severe hyponatremia did not influence mortality but was associated with increased RRT initiation and prolonged hospital and ICU stay. By contrast, mild hyponatremia was not associated with any clinical outcome.Further research is required to determine if correcting hyponatremia directly improves ICU patient outcomes, given the observational nature of the study.

CHARACTERIZATION OF HYPONATREMIA IN PATIENTS WITH ISCHEMIC STROKE

Objective: To characterize the hyponatremia based on severity in patients with ischemic stroke in the first twenty-four hours. Materials &amp; Methods: This cross-sectional descriptive study was done in the Medicine Department of Khyber Teaching Hospital, Peshawar, after obtaining approval from IREB. For a proportion of 25% population with mild hyponatremia, a sample of 289 was calculated using Open EPI Software keeping 95% as the confidence interval and 5% as the margin of error. We included all adult patients from age 16 years of either gender, having newly diagnosed ischemic stroke and yet had not started any treatment. Patients having other chronic diseases and endocrine disorders which can cause electrolyte disturbances, and act as confounders, were excluded. A Non-probability consecutive sampling technique was used. All data including name, age, gender, address, and the presence or absence of and the severity of hyponatremia was recorded. Data was analyzed using SPSS-22. Results: The mean age of the patients was 53 years with SD ± 8.53 (range 40-69 years). Male patients were 56.1% while 43.9% were females. Out of 289 patients, 101 (35%) patients had hyponatremia. Amongst these patients having hyponatremia, mild hyponatremia was present in 63 (62%), moderate hyponatremia in 27 (27%) and profound or severe hyponatremia was present in 11 (11%). Conclusion: Hyponatremia was present in about 1/3rd of patients who presented with ischemic stroke in our hospital. Among these, severe hyponatremia was seen in 11% of the patients. Keywords: Hyponatremia, ischemic stroke.

Etiology, Clinical Approach, and Therapeutic Consequences of Hyponatremia

A perturbation in the water balance rather than any change in salt content is the main cause of hyponatremia, the most frequent electrolyte abnormality, defined as a serum sodium concentration &lt;135 mEq/L. Hyponatremia may be divided between mild (Na &gt; 120 mEq/L) or severe (Na &lt; 120 mEq/L) hyponatremia, and is most frequently observed in elderly ICU hospitalized patients. Based on tonicity, hyponatremia may be hypotonic (a decreased concentration of the solute), isotonic, and hypertonic (falsely low sodium). According to the volume of extracellular fluid (ECF), hyponatremia is further divided among hypovolemic, euvolemic, or hypervolemic hyponatremia. Finally, hyponatremia may develop rapidly as acute (&lt;48 h), usually with severe symptoms, or slowly as chronic hyponatremia, usually being asymptomatic or with mild symptoms. Acute severe hyponatremia presents with severe CNS problems, increased hospitalization rates, and mortality. The treatment with 3% sodium chloride and a 100 mL IV bolus based on severity and persistence of symptoms needs careful monitoring. A non-severe hyponatremia may be treated with oral urea. In asymptomatic mild hyponatremia, an adequate solute intake with an initial fluid restriction of 500 mL/d adjusted according to the serum sodium levels is preferred. Vaptans could be considered in patients with high ADH activity regardless of whether they are euvolemic or hypervolemic. In general, the treatment of hyponatremia should be based on the underlying cause, the duration and degree of hyponatremia, the observed symptoms, and volume status of patient.

Relationship of severity of hyponatremia and adverse outcomes in children visiting the emergency department.

Mild hyponatremia is often found in patients visiting pediatric emergency departments (PEDs), but there are few large-scale studies on its association with adverse outcomes, including mortality. We conducted this study to identify the association of mild hyponatremia with adverse outcome. This retrospective observational study included children under 18 years of age visiting the PED at a tertiary hospital. We used electronic medical record data from January 1, 2009 to December 31, 2020. Clinical outcomes, including ward admission, vasopressor administration, pediatric intensive care unit (PICU) admission, and mortality, were assessed for the total of 44,147 patients. Among these, 1,639 (3.7%) were in the hyponatremia group, with 1,521 (3.4%) exhibiting mild hyponatremia. Mild hyponatremia was more prevalent in younger patients, particularly in the 1-3 years age group, and less common in females. Patients with mild hyponatremia had a significantly prolonged median length of stay in the PED compared to normonatremic patients (5.8 h vs. 4.4 h, p < 0.001). Moreover, they showed significantly higher rates of ward admission (51.1% vs. 35.6%, p < 0.001), vasopressor administration (1.1% vs. 0.6%, p = 0.014), PICU admission (2.4% vs. 1.0%, p < 0.001), and mortality (1.5% vs. 0.3%, p < 0.001). Compared with the normonatremia group, the odds ratios (95% CI) for ward admission, vasopressor administration, PICU admission, and mortality in the mild hyponatremia group were 1.90 (1.71-2.10), 1.91 (1.17-3.13), 2.62 (1.86-3.68), and 5.56 (3.51-8.80), respectively. Furthermore, our findings demonstrate a notable upward trend in adverse outcomes, including vasopressor administration, PICU admission, and mortality, from mild hyponatremia to severe hyponatremia. In conclusion, we found that adverse outcomes increase with the severity of hyponatremia in children presenting to the PED, highlighting the importance of immediate intervention alongside the identification of the underlying cause.

The Predictive Value of Plasma Sodium and Other Laboratory Parameters in Determining Complicating Appendicitis in Children

Objective: Finding a reliable preoperative predictor of complicated acute appendicitis (AA) has been a challenging diagnostic problem. The present study aimed to identify potential factors that may predict complicated AA in the pediatric emergency department (ED) based on routine, widely available laboratory tests on admission to the ED, including plasma sodium concentration. Methods: We retrospectively reviewed clinical and laboratory data of pediatric patients with AA who underwent emergency surgery at our department between January 2020 and December 2022. The patients were divided into two groups: histopathologically proven complicated AA (n = 80) and noncomplicated AA (n = 155). Results: Complicated AA was associated with reduced plasma sodium and chloride concentrations (p < 0.001, both), decreased values of lymphocytes (p = 0.002), elevated C-reactive protein (CRP) (p < 0.001), and elevated values of white blood cells (WBC) and neutrophils (p = 0.012 and 0.001, respectively). In binomial logistic regression, increased levels of CRP and WBC and decreased levels of sodium were predictors of complicated AA. The area under the receiver operating characteristic curve was 0.825 (95% confidence interval: 0.764, 0.886). Conclusion: We identified mild hyponatremia and elevated CRP and WBC values as potential markers for distinguishing complicated from uncomplicated pediatric AA with implications for surgical approaches for treating complicated AA and conservative approaches for treating uncomplicated AA.

Characteristics and Frequency of Hyponatremia in Newborns

Background: Hyponatremia, defined as a serum sodium level below 135 meq/L, is a significant and often overlooked problem in neonatal intensive care unit. Local data on the severity and chronicity of hyponatremia in neonates is lacking. This study aimed to investigate the features, risk factors, and frequency of hyponatremia in infants admitted to our NICU. Objective: To determine the incidence, identifying potential risk factors, assessing its severity, as well as understanding the recovery period and the duration of hospital stay associated with hyponatremia in neonates. Study Design: Cross-sectional study. Settings: Study was conducted in Neonatal ICUs of Fatima Memorial Hospital, Lahore Pakistan. Duration: January to December 2022 (1 Year). Methods: Sample size was 300, calculated with 95% confidence interval, 10% margin of error and 5% level of significance. It was done by using formula; n=Zs (p)(1-p)/d2 by using consecutive, non-probability sampling technique. After IRB approval all neonates meeting the inclusion criteria were included in the study after seeking informed consent from parents and relevant data was collected on the predesigned proforma. Results: Among 300 neonates included in final study 42% had mild hyponatremia and 58% had moderate-severe hyponatremia. Risk of severe hyponatremia were GA 28-32+6 weeks, IUGR and APGAR-5&lt;7. PIH increased the risk of chronic hyponatremia. Conclusion: In our study population 58% neonates had moderate to severe hyponatremia. Among 73.1% neonates born at GA 28-32+6 had moderate to severe hyponatremia. APGAR-5 of &lt;7 and IUGR increases the risk of moderate-severe hyponatremia by 42374 and 200 times respectively. Whereas maternal PIH is associated with increased risk of chronic hyponatremia.

Effect of mild hyponatremia on in-hospital falls of elderly hospitalized patients: A retrospective, cohort study

ObjectivesThis study investigated the association between hyponatremia and falls in elderly hospitalized patients, focusing on mild hyponatremia as a potential risk factor. Materials and MethodsA retrospective analysis of 16,952 patients admitted to Kochi Medical School Hospital from 2012 to 2021 was performed. Serum sodium levels were categorized, and falls during a 30-day observation period were recorded. A Cox proportional hazards model and a machine learning model were used to estimate risk and explore interactions. ResultsMild hyponatremia (130–134 mEq/L) was identified as an independent risk factor for falls (hazard ratio: 1.42, 95 % confidence interval 1.16–1.74), especially in patients with higher activities of daily living. The fall prediction model showed an area under the curve (AUC) of 0.780 (95 % confidence interval 0.751–0.806). ConclusionA significant association between mild hyponatremia and falls in elderly hospitalized patients was found. The findings highlight the need for targeted fall prevention and further research into the underlying mechanisms. Mild hyponatremia may serve as a clinical marker for fall risk, especially in patients with independent activities of daily living.