Active clinical trials for "Hypotension"

The objective of this research is to compare the effect of a low dose Vasopressin infusion or placebo during cardiopulmonary bypass on vasopressor requirements, hemodynamics and tissue oxygen saturation and its recovery using tNIRS and vascular occlusion test (VOT) in elective on pump cardiac surgery patients using a non-invasive near infrared spectrometry (NIRS) machine. The clinical implications are that NIRS may permit earlier, non-invasive detection of significant physiologic derangements and allow more accurate and timely titration of medications, fluids and surgical intervention. The use of a low dose vasopressin seems to be preventive for the incidence of observed post-cardiotomy vasodilatory shock and may improve the function of microcirculation that will be assessed using VOT and tNIRS. Finally, it may decrease both catecholamine dose and duration of their administration, it is considered as a useful agent for decreasing all heir side-effects

Orthognathic surgery, one kind of Oro-maxillofacial surgery, is a complicate surgery that undergoes several hours with nasotracheal intubation general anesthesia. To limit blood loss during operation, the patients are often under intentional hypotension. However, the intentional hypotension may confuse with hypovolemic induced low blood pressure. The hypothesis is using flotrac (to measure stroke volume variation) to keep the patients hemodynamics stable under Tridil and propofol infusion and avoid over-infusion of crystalloid or colloid and prevent hypovolemia induced postoperative nausea and vomiting.

Hypotension after induction of general anesthesia and before surgical stimulation is a prevalent anesthesia-related side effect. The post-induction hypotension disrupts organ perfusion and may cause organ damage particularly acute kidney injury, cerebrovascular stroke, and myocardial ischemia. Post-induction hypotension occurs with greater frequency and severity in the elderly. This is because of aged-related diminished cardiac reserve and impaired autonomic homeostasis. Pleth variability index (PVI) is a software program that measures the dynamic changes of the PI that occurs during a complete respiratory cycle. Our primary outcome is to determine the predictive ability and the optimal cut-off value of pre-anesthesia PVI for predicting elderly patients who are at risk of developing post-induction hypotension

the investigators purpose is to predict hypotensive condition that can develop after general anesthesia induction by measuring the Tricuspid Annular Plane Systolic Movement (TAPSE), which is an echocardiographic parameter.

The purpose of this study is to provide messages to providers if their patient is at high risk of developing intraoperative hypotension based on past medical history and co-morbidities preoperatively and minutes of hypotension intraoperatively.

The cardiogenic shock is characterized by an alteration of organs function following a decrease in cardiac output linked to an impairment of cardiac performance. The prognosis remains poor with mortality between 40 and 50%. Nowadays, Extracorporeal Life Support (ECLS or VA-ECMO) is the referent therapy to restore blood flow in the body when medical treatment is not sufficient. Despite a good blood flow provided by the ECLS, many patients develop a severe hypotension (so called vasoplegia) due to a loss of vascular resistance mainly explained by the inflammatory response to shock and extracorporeal circulation. The treatment of this reaction includes vasopressors (Norepinephrine in usual care) and serum surrogate perfusion to achieve a mean arterial pressure (MAP) above 65 mmHg. The purpose of this study is to describe the patients with vasoplegia among a retrospective cohort of patients treated with an ECLS in our university center, over the 4 last years, to determine major complication rate (including death, kidney failure and arrythmias) and their outcome. This study will provide consistent data useful for further trials about targets of pressure and treatments to increase blood pressure during ECLS.

Incidence of orthostatic intolerance and orthostatic hypotension after intravenous administration of morphine in patients prior to hip or knee arthroplasty.

This is a study using cerebral oximetry to evaluate the safety of traditionally adopted hypotensive anesthesia.

Septorhinoplasty is a cosmetic surgery that many people are choosing to undergo. It can be done under general anesthesia, twilight anesthesia or regional anesthesia. Controlled hypotensive anesthesia is required to minimize bruising, swelling, and bleeding that reduces visibility in the operative field and hence satisfactory surgical outcome. The goal of our study to prove that regional block of the nose provides efficient hypotensive anesthesia

Post-induction hypotension (PIH) is very common with high incidence about 9-60%. There are multiple factors that may cause PIH, like pre-operative fasting, bowel preparation, vasodilatation due to anesthetics, and reduced stimulation during preparation before incision. Hypotension could cause tissue hypoperfusion, ischemia and higher risk for stroke or myocardial infarction, which result in higher risk for prolonged hospital stay or death. In general surgical patients, lower pre-induction SAP, older age (>50 years old), and emergency surgery are independently associated with PIH. In this study, we would like to use a wireless continuous non-invasive sonography device to evaluate if the change of cardiac output during the perioperative period could predict PIH. Ｗe would like to enroll 80 patients of ASA class I to III who undergo abdominal surgery. GIS-Heartio® will be used to estimate the cardiac parameters one day before the surgery (Day 0) and after the patient enter the operation room till wound incision. Passive leg raise test would be performed on day 0 and before induction. We will analyze the patient's demographic data and the cardiac parameters to see if continuous cardiac output monitor can predict the occurrence of PIH.