Active clinical trials for "Hypotension"

Hypotension is extremely common after induction of spinal anesthesia for cesarean delivery. Anesthetic blockade of the sympathetic outflow of the spinal cord causes vasodilation, and is one cause of this hypotension. The higher the spread of the blockade will result in a higher incidence of hypotension. Injected hyperbaric medication has about 15 minutes to spread within the intrathecal space before it will be taken up by the nerve roots. The time that a patient remains in one position after medication injection will affect the spread of the resultant anesthetic block. A patient who is left sitting for a longer period of time after injection of hyperbaric medication will have a lower level of block than someone who is placed supine immediately. In this study, the investigators wish to use up down sequential analysis to determine the time period a patient should remain seated after intrathecal injection of hyperbaric bupivacaine that will result in a 50% rate of hypotension.

The purpose of this study is to assess the effects of ramosetron on corrected QT interval in patients undergoing off pump coronary artery bypass surgery.

The aim of this study was to demonstrate the effect of nicardipine on renal function with creatinine clearance, serum cystatin C, urine output and fractional excretion of sodium during deliberate hypotension for spine surgery.

Hypotension frequently occurs during anesthesia induction. Preload decrease by anesthetics was often considered as one of main causes for this hypotension. However, the studies on this topic have been lacking. Dynamic preload indices are more suitable than static preload indices to predict the effect of preload changes. And, recently, passive leg raising test showed successful results to predict fluid responsiveness in patient with spontaneous ventilation. The investigators hypothesized that hypotension after induction of anesthesia is caused by decrease of preload by anesthetics and passive leg raising test could predict this hypotension. In this study, the investigators will try to evaluate whether passive leg raising induced hemodynamic changes could predict hypotension during anesthesia induction.

The purpose of this study is to evaluate the safety, pharmacokinetic and the pharmacodynamic effects of escalating doses of MTR105 while weaning from bypass in a hypotensive population of cardiac surgery patients.

Hypothermia leads to increased morbidity and mortality. Heat loss mainly occurs during anesthesia and surgery. Therefore prevention of hypothermia in pediatric patients undergoing general anesthesia is very important. However, there is very little information about effectiveness of various insulating materials used in the operating room. Objective: To compare the effectiveness of cotton and plastic for prevent intraoperative hypothermia in pediatric patients.

Hypotension is a common side-effect of general anesthesia induction, and is related to adverse outcomes, including a significantly increased risk of one-year mortality. Hypovolemia is a significant risk factor, and optimized fluid therapy remains the cornerstone of its treatment. Ultrasound measurements of inferior vena cava (IVC) diameter with respiration have been recommended as rapid and noninvasive methods for estimating volume status. Several recent studies reported that preoperative IVC ultrasound has a reliable predicting ability of arterial hypotension after the induction of general anesthesia. The practical effect of optimizing fluid status before surgery using this ability has not been studied. Our hypothesis is that preoperative ultrasound-guided intravenous fluid bolus administration may reduce the incidence of hypotension after the induction of general anesthesia in adults presenting for elective non-cardiac, non-obstetric surgery

Background: Mucosal bleeding is the most frequent complication with endoscopic nasal surgeries, as it interferes with the optimal visualization of the intranasal anatomy, leading to increased complications, operation duration, and blood loss. There are several pharmacological techniques for the appropriate control of intraoperative bleeding. Objectives: To compare the safety and efficacy of oral labetalol versus oral metoprolol as a premedication for controlled hypotensive anesthesia during endoscopic nasal surgeries. Patients and Methods: This is a randomized, double-blind, phase four, comparative clinical trial; carried out on 60 patients, who were candidates for endoscopic nasal surgeries under general anesthesia at our hospital. Patients were randomly allocated into two equal groups; group L, received oral labetalol, and group M, received oral metoprolol.

The purpose of this study is to assess the prevention and treatment effect of transcutaneous acupoint electrical stimulation on hypotension after intraspinal anesthesia.

At our centre a conventional dose of 12 mg of hyperbaric bupivacaine in combination with a short acting opioid fentanyl (to increase block density) and a long acting opioid morphine (to provide post-operative pain relief ) is used for spinal anesthesia for cesarean section.However, larger doses of local anesthetic drug when used in caesarean section commonly cause low blood pressure and requires drugs (vasopressors) to treat it. In our study the investigators will standardize the doses of both opioids (fentanyl/morphine) and adjust the dose of local anesthetic (bupivacaine) based on the patients height and weight .One of the obvious challenges anesthesiologists face is providing adequate anesthesia to the patient whilst minimizing harmful side effects. Our primary concern is the low blood pressure as an effect of the spinal anesthetic as it is harmful to both mother and the baby. The investigators propose that the extent of surgical anesthetic block, which is dependent on height and weight in our adjusted dose group, will provide adequate anesthesia for surgery and minimise maternal low blood pressure.