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Local anesthetic systemic toxicity

Frederik Flenner, Nicole Arlt, Mahtab Nasib, Sophie Schobesberger, Thea Koch, Ursula Ravens, Felix Friedrich, Viacheslav Nikolaev, Torsten Christ, Sebastian N Stehr
BACKGROUND: Systemic toxicity of local anesthetics is predominantly complicated by their myocardial toxicity. Especially long-acting local anesthetics exert a negative inotropic effect that has been described at lower concentrations than defined for blockade of myocardial ion channels. We evaluated the negative inotropic effect of bupivacaine at a concentration described for clinical toxicity testing the hypothesis that negative inotropy is a result of reduced Ca sensitivity rather than blockade of ion channels...
March 16, 2018: Anesthesiology
(no author information available yet)
No abstract text is available yet for this article.
March 14, 2018: Anesthesia and Analgesia
Brandon Bacon, Natalie Silverton, Micah Katz, Elise Heath, David A Bull, Jason Harig, Joseph E Tonna
No abstract text is available yet for this article.
January 31, 2018: Journal of Cardiothoracic and Vascular Anesthesia
G Oksuz, A Urfalioglu, T Sekmen, N Akkececi, N Alpay, B Bilal
Context: : Local anesthetics (LAs) are in widespread use by dental practitioners, and erroneous administration, such as intravenously or exceeding the maximum dose, can cause the life-threatening condition of local anesthetic systemic toxicity (LAST). Aims: The objective of the present study was evaluate the ability of dentists to recognize signs of LAST and quantify how often they have used lipids to treat LAST in dentistry patients. Materials and Methods: The study administered 600 questionnaires that asked about the frequency with which dentists encountered LAST and the symptoms of LAST and its treatment, especially with lipids...
March 2018: Nigerian Journal of Clinical Practice
Michéal O Cathasaigh, Matt R Read, Aylin Atilla, Teresa Schiller, Grace P S Kwong
Peripheral nerve blocks are becoming increasingly popular for perioperative use as anesthetics and analgesics in small animals. This prospective study was performed to investigate the duration of motor and sensory blockade following use of bupivacaine for ultrasound-guided femoral and sciatic nerve blocks in dogs and to measure the plasma concentrations of bupivacaine that result from these procedures. Six dogs were anesthetized twice using a randomized cross-over design. At the first anesthetic, dogs were assigned to receive either an ultrasound-guided femoral nerve block or sciatic nerve block with 0...
2018: PloS One
M Werntz, R Burwick, B Togioka
BACKGROUND: Use of intraperitoneal local anesthetic to treat intraoperative pain during cesarean delivery has not been described previously. The aim of this study was to determine if intraperitoneal chloroprocaine may be useful as an adjunct to neuraxial block in reducing the proportion of patients with severe intraoperative pain that requires conversion to general anesthesia. Intraperitoneal chloroprocaine was administered during cesarean delivery as a potential alternative, when the anesthesiologist considered performing a general anesthetic due to severe intraoperative pain...
March 1, 2018: International Journal of Obstetric Anesthesia
Jean Liew, James Lundblad, Adam Obley
The overdiagnosis of thyroid malignancies may be contributing to the increased incidence of these cancers with a relatively stable mortality rate. We present the case of a man with known malignancies, who underwent biopsy of a suspicious thyroid nodule. This procedure was complicated by local anesthetic systemic toxicity (LAST). It is important to address goals of diagnostic testing and treatment with patients, particularly if further evaluation is unlikely to change management or outcomes.
December 16, 2017: Curēus
(no author information available yet)
No abstract text is available yet for this article.
March 2018: Anesthesia and Analgesia
Joseph M Neal, Crystal M Woodward, T Kyle Harrison
The American Society of Regional Anesthesia and Pain Medicine (ASRA) periodically revises and updates its checklist for the management of local anesthetic systemic toxicity. The 2017 update replaces the 2012 version and reflects new information contained in the third ASRA Practice Advisory on Local Anesthetic Systemic Toxicity. Electronic copies of the ASRA checklist can be downloaded from the ASRA Web site ( for inclusion in local anesthetic toxicity rescue kits or perioperative checklist repositories...
February 2018: Regional Anesthesia and Pain Medicine
Joseph M Neal, Michael J Barrington, Michael R Fettiplace, Marina Gitman, Stavros G Memtsoudis, Eva E Mörwald, Daniel S Rubin, Guy Weinberg
The American Society of Regional Anesthesia and Pain Medicine's Third Practice Advisory on local anesthetic systemic toxicity is an interim update from its 2010 advisory. The advisory focuses on new information regarding the mechanisms of lipid resuscitation, updated frequency estimates, the preventative role of ultrasound guidance, changes to case presentation patterns, and limited information related to local infiltration anesthesia and liposomal bupivacaine. In addition to emerging information, the advisory updates recommendations pertaining to prevention, recognition, and treatment of local anesthetic systemic toxicity...
February 2018: Regional Anesthesia and Pain Medicine
Marina Gitman, Michael J Barrington
This review summarizes presenting features, management, and outcomes of local anesthetic systemic toxicity (LAST) from published cases and those submitted to online registries capturing use of intravenous lipid emulsion (ILE) therapy. The results of single-center and multicenter registries and epidemiologic studies complement this information. Between March 2014 and November 2016, 47 separate cases of LAST were described in 35 peer-reviewed articles. Local anesthetic systemic toxicity events occurred as a result of penile blocks (23%), local infiltration (17%), and upper/lower extremity, torso, and neuraxial blockade...
January 5, 2018: Regional Anesthesia and Pain Medicine
Mathew Nelson, Alexandra Reens, Lara Reda, David Lee
BACKGROUND: Interscalene brachial plexus blocks have been a routinely performed method of anesthesia for shoulder surgery that decreases the need for general anesthesia, length of stay, and recovery time. We describe a case of bupivacaine toxicity after an interscalene block. CASE REPORT: The patient was a 66-year-old man who presented to our Emergency Department by emergency medical services from an ambulatory surgery center where he had undergone rotator cuff surgery, with bradycardia and hypotension...
December 30, 2017: Journal of Emergency Medicine
Bikash Bisui, Swastika Samanta, Sumanta Ghoshmaulik, Amit Banerjee, Tirtha R Ghosh, Suman Sarkar
Context: Brachial plexus block is effective with good postoperative analgesia in upper limb surgery has gained importance as it safe, low cost, and maintains stable hemodynamics intraoperatively. To decrease the onset time and prolong the duration of nerve block bicarbonate, opioids (morphine, fentanyl, etc.), sympathomimetic agents (epinephrine, phenylephrine, etc.), α-2 agonists (clonidine and dexmedetomidine), calcium channel blocker (verapamil), magnesium sulfate, etc., were studied with local anesthetics and their isomers...
October 2017: Anesthesia, Essays and Researches
Daniel S Rubin, Monica M Matsumoto, Guy Weinberg, Steven Roth
BACKGROUND: Local anesthetic systemic toxicity (LAST) is a rare and potentially devastating complication of regional anesthesia. Single-institution registries have reported a decreasing incidence, but these results have limited broad applicability. A recent study using a US database found a relatively high incidence of LAST. We used the National Inpatient Sample, a US database of inpatient admissions, to identify the national incidence and associated risk factors for LAST in total joint arthroplasties...
February 2018: Regional Anesthesia and Pain Medicine
Alina Y Rwei, Robert T Sherburne, David Zurakowski, Bruce Wang, Daniel S Kohane
BACKGROUND: The relatively short duration of effect of local anesthetics has been addressed by encapsulation in drug delivery systems. Codelivery with a single compound that produces an adjuvant effect on nerve block but without intrinsic local anesthetic properties can further prolong the nerve block effect. Here, we investigated whether codelivery of more than 1 encapsulated adjuvant compound can further enhance nerve blockade. METHODS: Liposomes loaded with bupivacaine (Bup), dexamethasone phosphate (DexP), or dexmedetomidine (DMED) were synthesized and its in vitro drug release profiles were determined...
December 11, 2017: Anesthesia and Analgesia
Matthew D McEvoy, Karl-Christian Thies, Sharon Einav, Kurt Ruetzler, Vivek K Moitra, Mark E Nunnally, Arna Banerjee, Guy Weinberg, Andrea Gabrielli, Gerald A Maccioli, Gregory Dobson, Michael F O'Connor
As noted in part 1 of this series, periprocedural cardiac arrest (PPCA) can differ greatly in etiology and treatment from what is described by the American Heart Association advanced cardiac life support algorithms, which were largely developed for use in out-of-hospital cardiac arrest and in-hospital cardiac arrest outside of the perioperative space. Specifically, there are several life-threatening causes of PPCA of which the management should be within the skill set of all anesthesiologists. However, previous research has demonstrated that continued review and training in the management of these scenarios is greatly needed and is also associated with improved delivery of care and outcomes during PPCA...
March 2018: Anesthesia and Analgesia
Francine D'Ercole, Harendra Arora, Priya A Kumar
Local anesthetic injected into a wedge-shaped space lateral to the spinal nerves as they emerge from the intervertebral foramina produces somatosensory and sympathetic nerve blockade effective for anesthesia and for managing pain of unilateral origin from the chest and abdomen. Paravertebral blockade (PVB) is versatile and may be applied unilaterally or bilaterally. Unlike thoracic epidural, the PVB technique may be used to avoid contralateral sympathectomy, thereby minimizing hypotension and leading to better preservation of blood pressure...
October 4, 2017: Journal of Cardiothoracic and Vascular Anesthesia
Diana L Wadlund
Local anesthetics are commonly used in the perioperative environment to facilitate surgical procedures or to provide postoperative pain management for patients. The use of local anesthetics, however, introduces the risk of complications resulting from local anesthetic systemic toxicity and the risks of increased morbidity and mortality for the surgical patient. Systemic toxicity from the injection or overdose of local anesthetics is a rare but potentially fatal complication that occurs in less than 1 in 1,000 patients...
November 2017: AORN Journal
Leonardo H C Ferraro, Alexandre Takeda, Cleber N Barreto, Bernadete Faria, Nilson A Assunção
INTRODUCTION: The risk of systemic bupivacaine toxicity is a persistent problem, which makes its pharmacokinetic study fundamental for regional anesthesia safety. There is little evidence of its influence on plasma peak at different concentrations. The present study compares two bupivacaine concentrations to establish how the concentration affects this drug plasma peak in axillary brachial plexus block. Postoperative latency and analgesia were also compared. METHODS: 30 patients were randomized...
October 14, 2017: Revista Brasileira de Anestesiologia
Camila Morais Gonçalves da Silva, Michelle Franz-Montan, Cíntia Elisabeth Gomez Limia, Lígia Nunes de Morais Ribeiro, Mário Antônio Braga, Viviane Aparecida Guilherme, Camila Batista da Silva, Bruna Renata Casadei, Cíntia Maria Saia Cereda, Eneida de Paula
Ropivacaine is a local anesthetic with similar potency but lower systemic toxicity than bupivacaine, the most commonly used spinal anesthetic. The present study concerns the development of a combined drug delivery system for ropivacaine, comprised of two types of liposomes: donor multivesicular vesicles containing 250 mM (NH4)2SO4 plus the anesthetic, and acceptor large unilamellar vesicles with internal pH of 5.5. Both kinds of liposomes were composed of hydrogenated soy-phosphatidylcholine:cholesterol (2:1 mol%) and were prepared at pH 7...
2017: PloS One
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