Active clinical trials for "Hypotension"

Spinal anaesthesia for elective caesarean section is associated with maternal hypotension, secondary to alteration of sympathetic tone and hypovolemia, in up to 70% of cases. Our objective, in this prospective single-centre observational study, was to assess the ability of change in systolic ejection volume after 45° passive leg raising to predict hypotension after spinal anaesthesia. Systolic ejection volum was monitored with non-invasive Clearsight Device just before elective caesarean section in third trimester pregnant women.

In this study, the investigators will monitor patients undergoing hemodialysis treatment with a non-invasive wearable PPG-based device. Measurements will include blood pressure, heart rate, oxygen saturation, stroke volume, cardiac output, cardiac index and systemic vascular resistance, among others. The aim is to diagnose intradialytic hypotension more rapidly than with current noninvasive methods and prevent related poor outcomes.

Comparison between ultrasound measurement of IVCD-AOd index in prediction of post induction hypo tension

Full term pregnant female patients presented for elective C.S for single viable fetus will be included in this study. Before anesthesia, the patient will be attached to a monitor of: ECG , heart rate, non invasive blood pressure, pulse taximeter applied on the index finger of the limb not attached to the blood pressure cuff, pulse oximetry and plethysmographic variability index (PVI) and perfusion index (PI) will be taken by (Massimo radical 7, Massimo corp. USA). Measures will be recorded every 5 minutes preoperative. Patients with PVI <15 will be excluded from the study. Patients with PVI > 15 are started on intravenous infusion of warm ringer lactate solution via suitable pore intravenous cannula to reach target of PVI <15 or a total 1 liter of ringer lactate. The patients in which the PVI is corrected by fluid to level below 15 will be Group (C) or corrected group. Patients in which intravenous fluid administration did not result any change in PVI or changed but still higher than 15 will be Group (NC) or non corrected group. After preoperative preparation patient is shifted to operating theater, with all monitors applied. She will receive spinal block at lumbar 3-4 space with hyperbaric bupivacaine 8 mg plus 25 mic fentanyl. After giving anesthesia and positioning for surgery with a left lateral tilt of 15 degrees,

The hypothesis is that plethysmography variability index can predict the occurrence of hypotension after spinal anesthesia for cesarean delivery

Hypotension after spinal anesthesia for Cesarean section occurs in up to 90% usually under five minutes after local anesthetics administration. These changes are poorly depicted by oscillometric measurements. The investigators hypothesized, that a continuous noninvasive device detects more hypotensive periods with lower blood pressures.

Background Symptomatic undifferentiated hypotension represents a negative prognostic factor and the strongest predictor of in-hospital mortality. Misdiagnosis may lead to delayed or incorrect treatment of some life-threatening conditions. Aim - The aim of the study is to evaluate the feasibility and accuracy of a new bedside ultrasound method that consists in the focused imaging of the thorax, abdomen and leg veins, in emergency. Methods Hypotensive (<100 mm/Hg) patients presenting to our emergency department, complaining of at least one of the neurologic, respiratory and cutaneous signs and symptoms of inadequate tissue perfusion, are prospectively studied by ultrasound-focused assessment of the heart, lungs, inferior vena cava, peritoneum, aorta and leg deep veins. On the basis of physical examination and ultrasound results, the operator declares the diagnostic hypothesis without influencing the attending physician and the following diagnostic procedure (which includes ultrasound, when needed). The diagnostic hypothesis is compared with the final diagnosis, obtained after the hospital route and discussed by a panel of three blinded experts (one radiologist, one cardiologist and one emergency physician). The statistical agreement is calculated by the k of Cohen with p-value, confidence intervals and raw agreement (Ra).

The automated inflatable abdominal binder is an investigational device for the treatment of orthostatic hypotension (low blood pressure on standing) in autonomic failure patients. The purpose of this study is to evaluate the performance of the binder in detecting body posture during different types of human motion patterns and activities of daily living, and to develop new (and better) ways to detect upright posture. In particular, the investigators want to determine if activities of daily living, normally encountered by patients (lying down, sitting, standing, walking, and climbing up and down steps), interfere with the detection of upright posture used to trigger the device. Studies will be conducted in healthy subjects because the main purpose of this study is to evaluate posture detection rather than treating orthostatic hypotension.

Spinal anesthesia is the technique of choice for planned cesarean section. It is associated with a high frequency of maternal hypotension. Hyperactivity of the sympathetic system assessed with the LF/HF ratio (heart rate variability analysis) predicts the severity of maternal hypotension after spinal anesthesia. Increased LF/HF ratio may be explained by maternal stress that can be measured with salivary amylase. The goal of this study is to assess the relationship between salivary amylase and severity of maternal hypotension after spinal anesthesia for planned cesarean section.

To determine if proprietary software that uses pulse-wave analysis to interpret the output of a conventional pulse-oximeter, can predict the onset of circulatory stress, before changes in blood pressure and pulse occur, in patients undergoing outpatient hemodialysis.