View clinical trials related to Spinal Anesthesia.
Filter by:The aim of this study is to compare spinal and general anesthesia in neonates undergoing herniorrhaphy.
Spinal anesthesia is widely accepted as the anesthetic method of choice for Cesarean section. However, the incidence of spinal hypotension is 50-70%, and the decrease in blood pressure is often rapid and severe. Heart rate variability is influenced by various factors such as the sympathetic nervous system, parasympathetic nervous system, temperature regulation, baroreflex, and endocrine regulation, but high frequency heart rate variability above 0.15 Hz very specifically reflects the parasympathetic nervous system. The ANI monitor calculates heart rate variability mediated by changes in the parasympathetic nervous system. This study aims to determine whether ANI monitor can predict hypotension in patients undergoing a caesarean section under spinal anaesthesia while applying the preemptive vasopressor phenylephrine infusion protocol.
Transurethral resection of the prostate (TURP) is the most common surgical intervention for patients with benign prostatic hyperplasia. TURP is mostly applied to elderly patients with hypertension and problems with breathing, circulation system, and kidney functions; therefore, it becomes very important to keep a stable anesthesia that will minimize the hemodynamic differences in these patients. General anesthesia causes more hemodynamic differences than regional anesthesia. Thus, regional anesthesia is highly preferable in TURP applications.
Severe pain associated with fractured hip often results in difficulty during positioning for spinal anesthesia (SA). Among many regional analgesic techniques, the fascia iliaca compartment block (FICB) is popular among anesthesiologists to provide immediate as well as postoperative analgesia in hip fractures. Recently, the pericapsular nerve group (PENG) block has been proposed to provide effective analgesia in hip fracture patients. However, comparative studies between PENG and FICB are lacking.
Spinal anesthesia remains a mainstay in lower limbs- as in day-case surgeries as well. It consists in injecting a local anesthetic drug into the intrathecal space of a patient's spinal canal. To achieve a suitable sensory and motor block for elective or emergent surgery, the anesthetist must adapt his choice of local anesthetic to the surgery's requirements and the patient's comorbidities, too. Spinal anesthesia is often associated with adverse cardiovascular events, notably hypotension which is a major concern in current anesthetic practice, especially in specific patient populations. Spinal induced hypotension is reported to be commonly related to the sympathetic block level and may be linked to perioperative cardiac and renal complications. Several mechanisms might play a role in the incidence of perioperative hypotension after spinal puncture. A decrease in peripheric systemic vascular resistance from arterial vasodilatation, a reduction of cardiac output due to a decrease in preload from a redistribution of venous blood into lower limbs or even an occurrence or increment of cardiac dysfunction, might compound proper blood flow towards noble organs such as brain, heart and kidneys. Spinal induced hypotension may also be related to a direct reduction of cardiac contractibility by the local anesthetic injection. Compensating mechanisms might be inhibited depending on the level of sympathetic blockade, usually related to the dose of the local anesthetic. Former studies found that intrinsic left ventricular depression might occur during spinal anesthesia as left ventricular volumes per se remain stable. One noticed that diastolic and systolic function (i.e., ventricular outflow tract velocity) decreased significantly after intrathecal levobupivacaine plus fentanyl injection based on transthoracic ultrasound assessment. Other authors use Pro-Brain Natriuretic Peptide to assess myocardial stress induced by surgery and anesthetic management. Other serum markers such as Cortisol, Adreno Cortico-Trope Hormone, Angiotensin are identified to screen and monitor myocardial stress as for instance acute myocardial dysfunction. Hyperbaric prilocaine is an intermediate-acting local anesthetic, whereas bupivacaine may be intermediate- or long-acting depending on the employed dose. Both drugs provide comparable sensory and motor block that meet the anesthesia level requirements in various surgical procedures. In regard to the hemodynamic effects, hypotension has been largely reported following hyperbaric bupivacaine in a dose-dependent way. However, discrepancy exists between the rare studies having investigated prilocaine's effects, probably related to the methodology and the employed doses. Moreover, the hemodynamics effects of these local anesthetics have been barely specifically investigated in a non-cesarean section context. The aim of this study is to compare the cardiovascular effects inflicted by hyperbaric prilocaine and bupivacaine under spinal anesthesia. Cardiovascular response will be assessed by non-invasive hemodynamic monitoring whereas metabolic stress will be evaluated using serum stress markers.
The goal of this clinical trial is to determine the effects of intravenous (IV) dexamethasone on spinal anesthesia in healthy women having an elective Cesarean delivery (CD) at the IWK Health Centre. The main questions it aims to answer are: 1. What effect does IV dexamethasone have on the resolution of motor blockade in patients having spinal anesthesia for elective CDs? 2. What effect does IV dexamethasone have on the sensory recovery of spinal blockade, the total hydromorphone requirement in the first 24 h postoperatively, the incidence of pruritis perioperatively, and the incidence of nausea and vomiting? The spinal anesthesia technique will be standardized and will be administered as per routine care at IWK Health. Computer generation will randomize patients to either Group SD, who will receive IV dexamethasone, or group SM who will receive IV metoclopramide, an alternative anti-emetic, immediately after spinal anesthesia by the attending anesthesia provider. Each patient will receive ondansetron, a second anti- emetic as recommended for Enhanced Recovery After Surgery (ERAS) protocol. Participant sensation, pain, nausea, pruritus, and motor blockade will be assessed in recovery. The patient's sensation and Bromage score will be assessed every 15 minutes until sensation is reached at L3 and a Bromage score of 4 is achieved. The investigators will determine if there is a difference between groups regarding motor blockade, the length of time of spinal anesthesia, and side effects after CD.
It is unclear whether routine addition of intra-operative forced-air warming in addition to warmed intravenous fluids during cesarean delivery under spinal anesthesia is beneficial. In this single-center randomized trial, we aim to test the primary null hypothesis that our current protocol of warmed intravenous fluids is similar to a combination of warmed intravenous fluids with intra-operative lower-body forced-air warming to maintain maternal temperature after cesarean delivery under spinal anesthesia. We also aim to assess the rate of maternal shivering during and after the procedure between the two groups, the maternal thermal comfort score, neonatal Apgar scores and umbilical pH levels. If we demonstrate no clinically important difference between the two interventions, clinicians will be able to continue our current protocol of warmed intravenous fluids only during cesarean delivery.
Subarachnoid anesthesia is an alternative and usually the first choice for many surgical procedures. It is a simple and safe procedure, however it can present complications such as hypotension and bradycardia. In this sense, ephedrine, an alpha and beta agonist agent, commonly used as rescue therapy for these events, is also potentially useful for prophylaxis of this unwanted effect and for less hemodynamic variation when preventively administered via the intramuscular route. Two groups will be divided: intramuscular ephedrine (0.5 mg/kg) and placebo. The variables analyzed and compared will be the incidence of hypotension and bradycardia, variation in mean and systolic blood pressure, heart rate, in addition to side effects. The main objective is to verify if the use of intramuscular ephedrine prior to spinal block is able to reduce the incidence of hypotension.
The aim of this study is to compare the paramedian approach for spinal anesthesia using ultrasound assistance (USAS) versus conventional palpation in morbidly obese patients undergoing elective surgeries.
Spinal anesthesia for cesarean section is associated with a high incidence of low blood pressure. However, the pathophysiology of this arterial hypotension is not unequivocal and could involve, in addition to drug vasoplegia, a mechanical cause linked to lower caval compression or even true or relative hypovolemia. Passive leg raise test has been proposed in an attempt to identify parturients who are more likely to develop low blood pressure after spinal anesthesia. Nevertheless, the data available on this volume expansion test to predict hemodynamic variations after performing spinal anesthesia are still limited and few objective criteria have been described to predict this arterial hypotension. The objective of the research is to study the hypothesis according to which the presence of hypovolaemia (true or relative) objectified by a positive passive leg raise test would cause hypotension more frequent and more marked in intensity.