Active clinical trials for "Hypotension"

Introduction: reduction of blood pressure after physical exercise is called post exercise hypotension (PEH). However, previous studies demonstrate that ingestion of caffeine equivalent to three tea-cup of coffee abolishes this phenomenon. Objective: evaluate the influence of different doses of coffee in PEH. Methods: eleven hypertensive performed four experimental sessions of aerobic exercise in cycle ergometer (40 minutes of duration, intensity between 60% and 80% of maximum heart rate) succeeds for the ingestion of one (CAF-1), two (CAF-2), three (CAF-3) doses of caffeinated coffee (144 mg/dose), or three doses of decaffeinated coffee (DESC). Blood pressure was measured in rest and during 120 minutes of recovery post exercise, each 10 minutes.

Traditional devices to measure blood pressure include automatic sphygmomanometer (pressure) cuff systems or manual blood pressures obtained by auscultation (listening with a stethoscope). Both these techniques fail to provide accurate and consistent blood pressure in the hypotensive (low blood pressure) state, which is often encountered in emergency departments and intensive care units. Alternately, invasive arterial pressure measurement is time-intensive, painful, expensive, and risks include bleeding, infection, and neurovascular injury. In clinical practice, the Doppler velocimetry system is occasionally used in hypotensive, critically-ill patients when an immediate systolic blood pressure measurement is vital for clinical and therapeutic management. With a technique similar to that used to obtain a manual blood pressure, the Doppler velocimetry system can be used in place of the auscultation of the brachial pulse to accurately determine the systolic blood pressure. It is currently unknown whether additional information can be obtained by evaluation of the Doppler waveform in healthy vs. critically-ill patients. The goal is this project is to digitally record Doppler waveforms of critically-ill patients in the Emergency Department (ED) via a standard 8MHz (fetal) Doppler probe, correlate the Doppler readings with current blood pressure and heart rate, and determine if waveform shapes and parameters are predictive of hemodynamic compromise.

Cervical myelopathy is commonly associated with degenerative spinal disease. Dysfunction of the autonomic nervous system is also evident in many cases of cervical myelopathy. Autonomic dysfunction may result in haemodynamic instability and hypotension under anaesthesia. It is important to maintain adequate mean arterial pressure in order to perfuse the spinal cord and prevent cord ischemia. Heart rate variability, the physiological variations of the differences between heart beats, has been used to diagnose autonomic dysfunction. In patients with cervical myelopathy it may enable the anaesthetist to predict hypotension thereby allowing for early treatment and prevention of spinal cord ischemia.

Aims: To compare the rates of hypotension in patients with malignancy-related ascites undergoing abdominal paracentesis with and without prophylactic intravenous albumin infusion Methodology: Patients with symptomatic ascites secondary to underlying malignancy admitted to medical oncology inpatient service who require abdominal paracentesis will be enrolled. Patients with known portal hypertension based on SAAG (>11.1 mmol/L) will be excluded. Eligible patients are randomized 1:1 to two groups. During drainage of ascites fluid, one group will receive intravenous albumin infusion (50 ml/Litre of ascitic fluid drained), whereas the other group will not receive intravenous albumin infusion. Baseline parameters along with routine 4 hourly monitoring of blood pressure will be done. Episodes of hypotension (fall in SBP > 20 mmHg) will be compared between these two groups and significance tested using the chi-square test. Clinical significance: Ascites often occurs in the setting of advanced malignancy and drainage of ascites has been proven to provide symptomatic relief in this patient population with relatively short life expectancy. The use of intravenous albumin infusion is loosely extrapolated from studies in patients with liver cirrhosis undergoing abdominal paracentesis. To date, there have been no standard guidelines to guide practice and no studies looking at the use of intravenous albumin in this population. As the mechanisms of ascites are different in different malignancies, the indication of intravenous albumin is uncertain and perhaps unnecessary in this setting. We hope to understand more about the rates of hypotension during abdominal paracentesis in this population and to generate systematic data to guide clinical practice in this area.

The aim of the present work was to analyze the short-term variability of SO2 during hemodialysis in sessions with and without hypotension to correlate the SO2 variability to hemodynamic instability.

The purpose of this study is to determine whether Kidney injury happens in controlled hypotension during brain operations by using Neutrophil Gelatinase Associated Lipocalin ELISA Kit and if so, does VitaminE+Selenium prevent it

SynABPM 2 proof-of-efficacy is a retrospective, multicentre, observational study performed in patients affected by hypotensive reflex syncope who had performed two ABPMs, one before and another after any therapeutical intervention aimed to increase arterial blood pressure

In pregnancy, cephalal shift of the diaphragm caused by the enlarged uterus reduces the functional residual capacity and may increase the closure volume and predispose the pregnant woman to airway closure, leading to atelectasis. The development of atelectasis due to dermatomes retained in spinal anesthesia and intraoperative supine position may increase further. Oxygen therapy to be applied may also lead to absorption atelectasis by causing hyperoxia. The aim of our study is to evaluate the effect of oxygen support on the lungs in cesarean section operations under spinal anesthesia by lung ultrasound score and oxygen reserve index.

The aim of this study was to compare between crystalloid versus crystalloid and colloid combination preloads for prevention of hypotension following intrathecal anaesthesia in patients undergoing elective Caesarean section. To examine weather baseline perfusion index could predict the incidence of intrathecal-induced hypotension during Caesarean section.

Primary objective: To compare the decrease in systolic blood pressure between hydration and venous contention when switching to a standing position. Hypothesis in that hydration is better than venous contention. Secondary objective: To evaluate the effect of hydration on lowering systolic blood pressure during the passage standing in elderly patients with orthostatic hypotension. Inclusion criteria: Patient aged over 75 years old with orthostatic hypotension proved to 1 and / or 3 min