View clinical trials related to Hypotension.
Filter by:This is a research study to test the application of FDA-approved, non-invasive device (NICaS) that measure the performance of your heart during HD treatment.
Although propofol is widely used as an induction agent for a general anesthesia, it can induce a profound hypotension, which leads to the hypo-perfusion of end organs and eventually increases morbidities. Theoretically, applying Trendelenburg position (head down and leg up position) increases cardiac preloads and cardiac outputs. However, in past researches, changing to Trendelenburg position alone is not enough and does not prevent propofol induced hypotension. Previous studies proved that leg wrapping effectively prevent hypotension after neuraxial anesthesia during Cesarean section. The leg wrapping prevents hypotension by increasing vascular resistance of lower extremities. The investigators made a hypothesis that applying both Trendelenburg position and leg wrapping prevent propofol induced hypotension more effectively than either applying Trendelenburg position only or taking no preventive measures.
This Study evaluates the effect of 20 weeks of isometric handgrip (IHG) home training in adults aged 50 years or more. Half of the participants will serve as a control group and will only receive hypertension-guidelines on lifestyle changes.
This study will find the median effective dose of remifentanil for rapid sequence intubation which avoids bradycardia and hypotension
Controlled hypotension has been used as a mean of reducing intraoperative blood loss and better visualization of the surgical field in nasal surgeries. Perfusion index has been considered a useful tool for monitoring changes in peripheral perfusion using Masimo set and serum lactate for central perfusion. Many medications were used to induce hypotension. In this study we will compare the effects of tridil and labetalol on the perfusion.
Immersion to the neck before and during hemodialysis session may increase intravascular volume, potentiate the ability to ultrafiltrate excess water, with less symptoms of shock, muscle crumps etc. The aim of the present study is to compare blood volume, hemodynamic and endocrine parameters of chronic ESRD patients undergoing forth dialysis session in water immersion vs. control regular session.
Spinal anesthesia is widely used as the procedure of choice for cesarean delivery. In comparison to epidural anesthesia it is faster, easier to perform, patients are more comfortable, complication rates are lower, and it is more cost effective. Spinal anesthesia is an accepted technique in elective cesarean sections. However, hypotension, resulted from sympathectomy is a common problem, especially in pregnant women. Spinal block causes peripheral vasodilation and venous pooling, which may result in maternal hypotension. Maternal hypotension after spinal anesthesia for cesarean delivery, without prophylactic measures, has a very high incidence (80%-100%). Even though highly investigated, spinal induced hypotension remains a major concern, and it has been referred to as the "Holy Grail" of obstetric anesthesia. The detrimental effects of the spinal induced hypotension are maternal and fetal. Maternal effects are nausea, vomiting and dizziness. Hypotension results in reduced uterine and intervillous blood flow with potential fetal hypoxia and acidosis. Treatment and prevention of hypotension has been the subject of much investigation and controversy. Prophylactic measures include: 1) left lateral tilt, 2) fluid preload, 3) vasopressors,4) low dose spinal anesthesia. A 15° left lateral tilt is used routinely during cesarean section, to prevent aorto-caval compression, however it is not sufficient as a sole method. Left uterine displacement is achieved by tilting the operating table or by placing a wedge under the woman's hip. Aorto-caval compression also may increase the spread of spinal anesthesia. Among the non-pharmacological interventions studied to minimize the incidence of hypotension sitting the patient up for up to 7 min after CSE anesthesia for cesarean section reduced intraoperative ephedrine requirement without affecting the success of the spinal anesthetic. In contrast, sitting up for 9 min resulted in the need for rescue epidural anesthesia without additional benefit. Phenylephrine Treatment of vascular failure in shock, shock-like states, drug-induced hypotension or hypersensitivity; correction of paroxysmal supraventricular tachycardia; prolongation of spinal anesthesia; vasoconstriction in regional analgesia; maintenance of adequate level of BP during spinal and inhalation anesthesia. It has a number of important attributes for treating spinal hypotension: (i) as an alpha-adrenergic agonist, its mechanism of action directly addresses the decrease in systemic vascular resistance following spinal anesthesia;(ii) phenylephrine has a faster onset of action compared with ephedrine; (iii) ephedrine is associated with a five-fold increased risk of fetal acidosis; and (iv) ephedrine is more likely to cross the placenta and increase concentrations of lactate, glucose, and catecholamines in the fetal circulation compared with phenylephrine. However, phenylephrine used alone may be accompanied by maternal bradycardia and does not benefit from widespread clinical experience, as does ephedrine do. Thus, phenylephrine has not yet become popular, particularly for prophylactic use. Clinical experience suggests that phenylephrine may be useful in addition to ephedrine when the latter fails to correct hypotension. Ephedrine sulphate is a potent sympathomimetic that stimulates both α and β receptors and has clinical uses related to both actions. Its peripheral actions, which it owes in part to the release of norepinephrine, simulate responses that are obtained when adrenergic nerves are stimulated. These include an increase in blood pressure, stimulation of heart muscle, constriction of arterioles.
The aims of the study are: 1. To evaluate the feasibility of echocardiography monitoring in postoperative unit; 2. To assess diagnostic value of different focussed echocardiography parameters to define fluid responsiveness for non-cardiac hypotensive spontaneously breathing patients after major abdominal surgery.
The purpose of this study is to estimate the intracranial pressure (ICP, the pressure in your head) in subjects with intracranial hypotension (a condition caused by leakage of the fluid that surrounds your brain and spine) using non-invasive magnetic resonance imaging (MRI) techniques, and to determine whether changes in estimated ICP are seen after treatment of this condition.
Undifferentiated hypotension is a medical emergency where a patient's blood pressure drops to critical levels due to several possible reasons. The medical staff treating the patient will need to find out the reason for your drop in blood pressure as soon as possible. When treating low blood pressure, the medical staff typically performs a procedure called central venous cannulation (CVC). CVC involves accessing a large vein (usually the subclavian under the collarbone) by inserting a needle into the vein. By doing this, the medical staff can measure the pressures in the patient's veins or give medicine to the patient while they are in the hospital. The purpose of this study is to compare the time needed to complete CVC using the AxoTrack device to CVC guided by landmarks on a patient's body. The investigators expect that there will be a maximum of 30 patients enrolled in this study.