Hyponatremia

Researchers are conducting a study called Acutelines, a large data and biobank project at the University Medical Center Groningen in the Netherlands. It focuses on patients with a wide range of acute medical conditions who present to the Emergency Department. The goal is to improve how acute diseases are recognized and treated, understand their outcomes, and support personalized medicine by collecting detailed clinical data, imaging, and biomaterials over time. Participants have their medical information, including demographics, health status, medical history, vital signs, diagnostic tests, and treatments, systematically collected. Biomaterials such as blood, urine, feces, and hair are gathered from patients who meet certain severity criteria. Data collection occurs during hospital admission, including continuous monitoring, and continues with follow-ups at 3 months, 1 year, 2 years, and 5 years after the initial emergency visit. Throughout the study, various assessments are performed, such as quality of life, physical functioning, mental health, symptoms, and hospital length of stay. Researchers collect data on mortality and other health outcomes for up to 50 years. The study uses digital tools to automate data capture and integrates information from multiple healthcare sources. Participants will be monitored closely during hospitalization and at scheduled intervals afterward to help improve understanding and treatment of acute diseases.

Cardiovascular diseases are a leading cause of death worldwide, with increasing concerns about metabolic dysfunction and type 2 diabetes. Research suggests that the hormone arginine vasopressin (AVP), which regulates body fluid balance, may be linked to diabetes risk when water intake is low. This study aims to explore whether increasing water intake with plain water or non-sugar-sweetened beverages can improve hydration, glucose regulation, and cardiovascular health in normal-weight and obese adults. The study involves two groups of adults classified by body mass index (BMI) as normal weight or obese. Participants will follow an 8-week crossover design with periods of habitual fluid intake, low, moderate, and adequate fluid intake using either plain water or non-sugar-sweetened beverages. Fluid intake is controlled by providing drinks and smart water bottles that record intake and send reminders. The study includes a washout period and weekly lab visits for assessments. Participants will attend weekly lab visits after fasting for at least 10 hours. Assessments include hydration biomarkers from urine samples, body composition, blood pressure, cognitive tests, resting metabolic rate, endothelial function via ultrasound, and oral glucose tolerance tests with multiple blood draws. Continuous glucose monitoring will occur throughout the intervention. Mood, sleep quality, diet, and physical activity will also be monitored using questionnaires and wearable devices. The study's main outcomes include measures of vascular function and glucose regulation over the 8 weeks.

Increasing heat exposure caused by climate change is affecting communities worldwide, especially those living in poor housing conditions such as informal settlements and low-income households. This research aims to study the impact of applying sunlight-reflecting cool roof coatings on indoor temperatures and overall health. The trial is a global, multi-center, cluster-randomized controlled study conducted in five urban climate hotspots across Africa, Asia, Latin America, and Oceania, where heat exposure and vulnerable housing conditions pose significant health risks. The study compares households that receive a cool roof coating, which reflects sunlight and reduces indoor heat, with those that keep their original roofs. The cool roof coating works by reflecting ultraviolet and visible sunlight and radiating absorbed heat, thus lowering indoor temperatures and energy use. The trial will run over a 12-month period, including the hottest months of the year, to measure the effects on health, indoor environment, and economic outcomes. Participants will undergo repeated measurements including resting heart rate, blood glucose control, depression symptoms, and various health and environmental factors over the course of the study. Data will be collected at baseline and multiple times during the hottest months and alternate months. Researchers will monitor indoor air temperature, humidity, heat index, and household energy use continuously. The study seeks to provide evidence on whether cool roofs can improve physical, mental, and social wellbeing in vulnerable populations facing extreme heat.

Researchers are studying children aged 6 months to 5 years who have acute gastroenteritis, a common cause of dehydration and emergency visits. The study compares two types of intravenous fluids used for rehydration: normal saline, which has a high chloride content, and balanced crystalloids like Isolyte-S, which contain acetate and gluconate to help neutralize acid. The goal is to see if balanced fluids improve blood bicarbonate levels and other clinical outcomes compared to normal saline. The study observes children who receive either normal saline or the balanced crystalloid Isolyte-S as part of their routine care, with the treating physician deciding which fluid to use independently. No additional tests or treatments are given for research purposes. Data are collected at baseline when fluids start, about 4 hours later from routine blood tests, and 72 hours after discharge to check for return visits. During participation, children's blood tests taken as part of standard care are reviewed to evaluate changes in serum bicarbonate, blood pH, chloride levels, and other measures like time to first oral intake and hospital admission. Researchers also track if additional IV fluid boluses are needed and monitor for emergency return visits within 72 hours. The study lasts through these observation points without extra procedures beyond usual care.

This research aims to compare the hydration effects of two electrolyte hydration stick products and plain water in healthy adults. The study focuses on the general population rather than athletes and evaluates how adding amino acids or carbohydrates to electrolyte solutions impacts hydration. Researchers will assess hydration by measuring fluid balance, beverage hydration index, urine composition, and blood glucose levels. Participants will attend multiple visits during which they consume one liter of a randomly assigned solution in four equal parts over 30 minutes, followed by four hours of monitoring. The solutions tested include a Hydramin electrolyte and amino acid drink, an electrolyte and carbohydrate drink, and plain water. Each participant experiences all three beverages in varied orders across visits. Throughout the study, participants undergo various assessments including urine tests for sodium, potassium, and specific gravity, blood glucose monitoring using finger pricks, body water measurement, and mood and digestive questionnaires. Vital signs such as blood pressure and heart rate are also recorded at multiple time points. The total observation for each visit spans about 4.5 hours, allowing detailed monitoring of hydration and metabolic responses.

Researchers are investigating how a simple bedside test called bio-electrical impedance analysis (BIA) can reveal changes in body water content during pregnancy and labor. The study focuses on understanding how different medical conditions, including hypertensive disorders and complications like hyperemesis gravidarum or major postpartum hemorrhage, might affect fluid balance in pregnant women. This observational study aims to enhance knowledge about hydration changes and their clinical relevance in pregnancy. The study involves pregnant women in several groups: those attending for elective cesarean section, those admitted for induction of labor expecting to stay over 24 hours, women with maternal conditions affecting body fluid such as pre-eclampsia, hyperemesis gravidarum, or major postpartum hemorrhage, and gestational age-matched control participants. BIA is used to measure total body water and differentiate extracellular and intracellular water compartments by transmitting electric currents at various frequencies. Participants will be assessed on admission using BIA to determine hydration status. Researchers will collect data during labor and delivery, including fluid intake and medical conditions. The main outcome measured is the bioimpedance assessment of hydration status upon admission. The study also includes monitoring of clinical and physiological parameters related to fluid balance. Participants may be involved for the duration of their hospital stay, with careful observation of body fluid changes and potential impacts on labor and delivery outcomes.

Researchers are evaluating the effectiveness of two new hydration beverage formulas for rehydration after exercise in healthy adults. The study aims to compare these products to a placebo in improving hydration status and related outcomes such as exercise recovery and cognitive performance. The trial is randomized, double-blind, and crossover in design, sponsored by Liquid I.V. Participants will receive one of the two hydration products, called TP1 and TP2, or a placebo during separate experimental visits. Each participant experiences all three conditions at different times. The study spans an average of 8 weeks during which these treatments are administered and assessed. Throughout the study, participants will be monitored for relative rehydration, hydration status through sweat loss, and self-reported outcomes. Various assessments will be conducted regularly to measure these effects. The study includes healthy adults aged 18 to 35 years who exercise regularly and meet specific health criteria. Safety and adherence are tracked during the visits, with all procedures designed to evaluate the hydration effects of the tested beverages.

Researchers are studying patients with subarachnoid hemorrhage, a condition where bleeding occurs in the space around the brain. These patients often suffer from low sodium levels in the blood, which is linked to serious complications like brain swelling, vasospasm, and higher risk of death. The study aims to find out if the type of intravenous fluid given, based on its sodium content, affects patients' recovery and survival. The trial compares two types of intravenous fluids for fluid maintenance and resuscitation in these patients: 0.9% sodium chloride (normal saline), which has a higher sodium content, and lactated Ringer's solution, which has a lower sodium content. Patients receive only their assigned fluid from the time they enter the study until they are discharged from the intensive or intermediate care unit. Neurological evaluations are done hourly at first, then every two hours, while blood tests and assessments of kidney, heart, and immune function occur at specific times during the stay. Participants are closely monitored for complications including vasospasm, brain swelling, infections, and mortality during their ICU stay, usually up to 21 days. After discharge, patients are followed up with telephone interviews to assess long-term outcomes like disability and cognitive function at 90 and 180 days. The study also tracks length of stay, organ support days, and other health measures to understand how the fluid choice impacts recovery and survival.

Researchers are evaluating the effects of adding glycerol to electrolyte beverages on fluid balance in healthy men and women who are well hydrated and at rest. This study follows earlier research suggesting that glycerol combined with sodium can improve fluid retention and balance. The study aims to test if fluid balance is maintained and greater than placebo after drinking carbohydrate-electrolyte beverages with varying glycerol content. The study has two parts where participants consume different carbohydrate-electrolyte drinks with and without glycerol or a placebo beverage. Each beverage is given in three doses of 9.3 oz (276 ml) over 35 minutes, followed by a rest period before measuring outcomes. Participants may take part in both parts of the study with dosing days spaced 2 to 15 days apart. Beverages are matched for color and flavor to maintain consistency. Participants will undergo multiple assessments including body weight and percent change in body mass before and after beverage consumption at several time points up to 150 minutes post-dose. Additional tests include measuring fluid retention, urine output, blood sodium and glucose levels, plasma volume changes, blood pressure, heart rate, and subjective symptoms like headache or lightheadedness. Menstrual status is also recorded at screening. The study involves careful monitoring and data collection to understand fluid balance effects over time.

Researchers are evaluating how rapid dehydration-induced weight loss affects sleep quality, cognitive skills, and muscle strength in male combat athletes aged 17 to 28. The study aims to document both benefits and risks of rapid weight-cutting methods used in weight-class sports, providing guidance for safer athlete weight management and potential updates to international weigh-in rules. This research is sponsored by Abant Izzet Baysal University and contributes important insights to sports science. The study involves competitive senior male combat athletes undergoing a randomized crossover design with three trials: two experimental trials involving 3% body weight loss through sauna-induced dehydration, and one control trial without dehydration. In the experimental trials, dehydration is achieved by repeated sauna sessions until the target weight loss. Measurements before and after dehydration include body weight, body composition, total body fluid, resting heart rate, body temperature, cognitive tests, and surface electromyographic (sEMG) responses during isokinetic leg strength testing. One experimental trial includes a night without rehydration to assess sleep quality effects, while the other allows rehydration overnight. Participants will undergo multiple assessments during each trial, including sleep monitoring, cognitive tests such as the Stroop test and Montreal Cognitive Assessment, sEMG recordings, and leg strength measurements. Sleep quality is recorded overnight using a sleep tracker. Measurements occur before dehydration, after dehydration, the next morning, and after rehydration when applicable. All tests repeat across three sessions spaced one week apart according to the randomized design. This thorough monitoring evaluates how dehydration and rehydration impact physical and cognitive performance, sleep, and muscle activity over time.