View clinical trials related to Hypotension.
Filter by:Study Protocol: Outcome Measurements Primary Outcome The main outcome will be the preoperative performance of the dIVCmax/IVCCI ratio to foresee the incidence of hypotension after spinal anesthesia in a greater extent to that of the established IVCCI measurements. Secondary Outcomes To identify other echocardiographic or clinical measurements that can predict an intraoperative spinal-induced haemodynamic instability. Sample Size Calculation A pilot study of 20 patients revealed a detected area under the ROC curve (AUC) of 0,91 for dIVCmax/IVCCI and for dIVCmax 0,82 with rank correlation between the two assays being 0.87 in both positive and negative cases. Based on this result, a sample of 56 patients will achieve 80% power to detect significant difference (at a level 0.05) between dIVCmax/IVCCI and dIVCmax. Potential Benefits of the Study The results of this study will allow us to determine which clinical or US-measurement can yield better performance so as a preoperative prediction of spinal-induced hypotension can be achieved; that way these measurements can permit and guide a targeted preoperative fluid challenges prior to the implementation of spinal anesthesia Potential Side Effects of the Study Participation in this protocol will not put patients at higher risk for complications since we do not perform any intervention (either pharmacological or surgical) There will be no occupational risks to researchers or assistants. Proposed Timetable According to the exclusion criteria and taking into account the number of cases performed in our department per monthly basis, it should take us approximately 6 months to recruit 60 patients.
Online hemodiafiltration confers a reduced mortality risk. However, it is not clear why HDF improved survival. To gain more insight in this issue, the effect of 4 dialysis techniques (differing in dialysate temperature and the absence/presence of convective clearance) on intradialytic hemodynamic stability and cardiac function will be investigated in a prospective cross over trial.
This is a double blind placebo controlled trial in Parkinson's disease (PD) patients with neurogenic orthostatic hypotension (NOH). Investigators hypothesize that the study drug (droxidopa) may improve cerebral perfusion more robustly than systemic BP, possibly by direct action within the CNS vasculature. This study is designed to determine if droxidopa improves cerebral perfusion measures in PD patients with NOH, in addition to peripheral BP measures and subjective responses.
A prospective, double-blinded study. The present study consisted in applying Stroke volume variation fluid guided therapy to old patients (65 years old) undergoing radical resection of colon surgery. The aim of this study is to compare the effects of norepinephrine and phenylephrine in treating perioperative hypotension, and to find the safest and most effective vasopressor for elderly.
160 pregnant patients will be enrolled in this study. Participants will divide in to 4 groups. Spinal anaesthesia will perform with 5% marcain heavy 2 ml+20 microgram fentanyl to the all patients. After performed spinal anaesthesia, vasopressor infusion will be started intravenously. Epinephrine will prepare 5 mg/ml and infusion rate will adjust 30 ml/h for Group E. Norepinephrine will prepare 5 mg/ml and infusion rate will adjust 30 ml/h for Group NE and 0.9% saline (group S) was launched immediately after induction of spinal anesthesia. Phenylephrine will prepare 100 microg/ml and infusion rate will adjust 30 ml/h for Group P. If systolic blood pressure decrease 20% of basal value or below to 100 mmHg, bolus ephedrine will apply intravenously (IV). If heart rate will decrease 60 beat per min or 20% of basal value, atropine will apply IV.
Prospective, randomized study, including full term parturients scheduled for caesarean section under spinal anesthesia. Spinal anesthesia was performed in sitting position with a 25 G spinal needle and all patients received 15 ml/kg of crystalloid intravenously during the spinal block. Baseline hemodynamics: heart rate, systolic and diastolic blood pressure were recorded before spinal anesthesia and intraoperatively. Postspinal hypotension, defined as decrease of Systolic blood pressure>20% from the baseline value, was managed using Ephedrine increments 6 mg/3min in patients of GE group or by 5 mcg Norepinephrine/3min for the patients of GN group. Intraoperative hemodynamic data of the 2 groups were compared.
This is a pilot randomized clinical trial in which patients treated with 3X per weekly conventional hemodialysis will be treated to a dialysate sodium 135 mEq/L vs. 138 mEq/L and followed for safety and tolerability, effects on BP and volume.
Per-dialytic hypotension is common in Intensive Care Unit patients under continuous renal replacement therapy, and occurs in nearly 50% of the patients. To date, there is a lack of study having characterized the underlying mechanism of hypotension in this setting. New diagnostic methods are now available with high reliability to identify hypovolemia as the underlying cause of hypotension, among which change in cardiac index during passive leg raising may be the less affected by restrictive validity criteria. A change in cardiac index greater than 10% during this test is highly predictive of preload dependence, i.e the probability than cardiac index will increase if cardiac preload increases. The aim of this study is then to identify, among hypotensive episodes occurring during renal replacement therapy in Intensive Care Unit patients, the percentage of episodes related to preload dependence as identified by passive leg raising.
To investigate biomarker reflects systemic or specific organ perfusion well, we are going to the observational comparison study using several hemodynamic monitoring methods in the premature infants. It includes near-infrared spectroscopy (NIRS), pulse oximetry with perfusion index (PI) and pleth variability index (PVI) and functional echocardiography.
Hypertension is the most prevalent cardiovascular disease risk factor among individuals 60 years of age and older. Hypertension can be prevented and modified with lifestyle interventions that include regular exercise. Water exercise is widely recommended for older adults for a variety of health benefits, but few studies have assessed the immediate ambulatory blood pressure (BP) response to water exercise, a response termed postexercise hypotension (PEH). We will assess PEH after a session of water aerobics in physically active, older women with hypertension. Twenty-four women will be randomly assign to participate in a 45 min session of moderate intensity, water aerobics (WATER) and a 45 min land control session (CONTROL). All experimental sessions will start at 9 am sharply with 7 days between them. Subjects will left the experiments wearing an ambulatory BP monitor for the next 21 hr.