View clinical trials related to Hypotension.
Filter by:The purpose of this study is to investigate the potency between prophylactic norepinephrine and phenylephrine boluses for postspinal anesthesia hypotension in patients undergoing caesarean section.
The purpose of this study is to investigate the potency between prophylactic norepinephrine and phenylephrine boluses for postspinal anesthesia hypotension in patients with severe preeclampsia during caesarean section.
To evaluate the clinical performance of the Hypotension Prediction Index obtained from the continuous, non-invasive Clear Sight monitor.
Objective: The objective of this study is to describe the physiology of the cerebral autoregulation over time during extreme low blood pressures (BP). Study design: This is a retrospective data collection study. During the Personalized External Aortic Root Support (PEARS) procedure extreme low blood pressures < 65 mmHg are medically induced. Hemodynamic and neurophysiologic data is for clinic purposes stored. Study population: All patients requiring a PEARS study at the Amsterdam University Medical Centers, location Amsterdam Medical Center (AMC). Investigation: Cerebral parameters during sustained low blood pressures are monitored with the transcranial doppler (TCD) for cerebral blood flow velocity (CBFV), near infrared spectroscopy (NIRS) for cerebral tissue oxygenation (rS02) and the electroencephalography (EEG) for the cerebral activity. Blood pressure waveforms are retrieved from an invasive arterial catheter. Besides, blood gasses during the low blood pressures and cardiac output, measured with a Schwan Ganz catheter are collected as well as electronic health records (EHR) (like age, gender and weight). All these devices are implemented as stated in the clinic protocol. Main study parameters/endpoints: The investigators will describe the cerebral autoregulation (CA) in several ways to retrieve a cut-off or lower limit of the CA where the regulation is either intact or impaired. First the static CA will be created with the mean arterial pressure (MAP) and mean cerebral blood flow (CBFm), second, the CA will be described with the mean flow velocity index (Mx, a method which calculates the correlation between the MAP and CBFm), COX (correlation between MAP and rS02) and with data of the EEG. After retrieval of the cut off or lower limit, the CA below this point will be described over time to check for differences.
The study aims to assess internal jugular vein ultrasound derived measurements and indices prior to spinal anesthesia in elderly population who fulfills predetermined inclusion criteria and might greatly benefit from an appropriate hemodynamic control during orthopedic surgery. Therefore, it is evaluated the diagnostic performance of these indices in predicting spinal-induced hypotension in this subset of participants.
The purpose of this research study is to determine how vasopressors affect a measure of how intravenous fluid is administered in people undergoing surgery who have low blood pressure called Pulse Pressure Variability (PPV). This study will recruit human subjects to undergo simulated hypovolemia called Lower Body Negative Pressure (LBNP) and will receive phenylephrine and placebo, while PPV will be measured in both conditions. This research will help anesthesiologists learn more about how to use PPV in patients undergoing surgery and who need vasopressors.
The Hypotension Prediction Index via the Edwards Hemosphere advanced monitoring system is monitored in living donor liver transplantation recipients. The Hypotension Prediction Index is analyzed to verify the performance in predicting hypotensive events.
It is a single-center randomized controlled trial that aims to figure out the effect of the hypotension prediction index (HPI) on the prevention of acute kidney injury (AKI) after radical cystectomy. The primary hypothesis is that HPI software guidance prevents postoperative AKI by reducing the duration and severity of intraoperative hypotension (IOH).
The aim of this study is to investigate whether the change in pleth variation index (PVI) according to preoxygenation can predict hypotension during anesthesia induction.
Based on the patient's heart rate variability, the analgesia nociception index (ANI) measures the activity of the autonomic nervous system and the sympathetic/parasympathetic nervous system and expresses it as a numerical value through a specific algorithm. The investigators will analyze it and see if it has the ability to predict severe hypotension following spinal anesthesia.