Practical Use of Local Anesthetics in Regional Anesthesia
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Chapter 11 Local Anesthetics
Chapter LOCAL ANESTHETICS 11 Kenneth Drasner HISTORY MECHANISMS OF ACTION AND FACTORS ocal anesthesia can be defined as loss of sensation in AFFECTING BLOCK L a discrete region of the body caused by disruption of Nerve Conduction impulse generation or propagation. Local anesthesia can Anesthetic Effect and the Active Form of the be produced by various chemical and physical means. Local Anesthetic However, in routine clinical practice, local anesthesia is Sodium Ion Channel State, Anesthetic produced by a narrow class of compounds, and recovery Binding, and Use-Dependent Block is normally spontaneous, predictable, and complete. Critical Role of pH Lipid Solubility Differential Local Anesthetic Blockade Spread of Local Anesthesia after Injection HISTORY PHARMACOKINETICS Cocaine’s systemic toxicity, its irritant properties when Local Anesthetic Vasoactivity placed topically or around nerves, and its substantial Metabolism potential for physical and psychological dependence gene- Vasoconstrictors rated interest in identification of an alternative local 1 ADVERSE EFFECTS anesthetic. Because cocaine was known to be a benzoic Systemic Toxicity acid ester (Fig. 11-1), developmental strategies focused Allergic Reactions on this class of chemical compounds. Although benzo- caine was identified before the turn of the century, its SPECIFIC LOCAL ANESTHETICS poor water solubility restricted its use to topical anesthe- Amino-Esters sia, for which it still finds some limited application in Amino-Amide Local Anesthetics modern clinical practice. The -
A Randomised, Non-Inferiority Study of Chloroprocaine 2% and Ropivacaine
www.nature.com/scientificreports OPEN A randomised, non‑inferiority study of chloroprocaine 2% and ropivacaine 0.75% in ultrasound‑guided axillary block Irene Sulyok1, Claudio Camponovo2, Oliver Zotti1, Werner Haslik3, Markus Köstenberger4, Rudolf Likar4, Chiara Leuratti5, Elisabetta Donati6 & Oliver Kimberger1,7* Chloroprocaine is a short‑acting local anaesthetic with a rapid onset of action and an anaesthesia duration up to 60 min. In this pivotal study success rates, onset and remission of motor and sensory block and safety of chloroprocaine 2% was compared to ropivacaine 0.75% for short‑duration distal upper limb surgery with successful block rates as primary outcome. The study was designed as a prospective, randomised, multi‑centre, active‑controlled, double‑blind, parallel‑group, non‑inferiority study, performed in 4 European hospitals with 211 patients scheduled for short duration distal upper limb surgery under axillary plexus block anaesthesia. Patients received either ultrasound guided axillary block with 20 ml chloroprocaine 2%, or with 20 ml ropivacaine 0.75%. Successful block was defned as block without any supplementation in the frst 45 min calculated from the time of readiness for surgery. 90.8% patients achieved a successful block with chloroprocaine 2% and 92.9% patients with Ropivacaine 0.75%, thus non‑inferiority was demonstrated (10% non inferiority margin; 95% CI − 0.097, 0.039; p = 0.02). Time to onset of block was not signifcantly diferent between the groups. Median time to motor and sensory block regression was signifcantly shorter as was time to home discharge (164 [155–170] min for chloroprocaine versus 380 [209–450] for the ropivacaine group, p < 0.001). -
Mepivacaine Hydrochloride Injection
POLOCAINE- mepivacaine hydrochloride injection, solution Dentsply Pharmaceutical ---------- 3% Polocaine® DENTAL Mepivacaine Hydrochloride 3% (30 mg/mL) (Mepivacaine Hydrochloride Injection, USP) 2% Polocaine® DENTAL with Levonordefrin 1:20,000 Mepivacaine Hydrochloride 2% (20 mg/mL) with Levonordefrin 1:20,000 (Mepivacaine Hydrochloride and Levonordefrin Injection, USP) Rx Only THESE SOLUTIONS ARE INTENDED FOR DENTAL USE ONLY. DESCRIPTION Mepivacaine Hydrochloride, a tertiary amine used as a local anesthetic, is 1-methyl-2,' 6' - pipecoloxylidide monohydrochloride with the following structural formula: It is a white, crystalline, odorless powder soluble in water, but very resistant to both acid and alkaline hydrolysis. Levonordefrin, a sympathomimetic amine used as a vasoconstrictor in local anesthetic solution, is (-)-α-(1-Aminoethyl)-3, 4-dihydroxybenzyl alcohol with the following structural formula: It is a white or buff-colored crystalline solid, freely soluble in aqueous solutions of mineral acids, but practically insoluble in water. DENTAL CARTRIDGES MAY NOT BE AUTOCLAVED. 3% (30 mg/mL) Polocaine® DENTAL (mepivacaine hydrochloride injection 3% (30 mg/mL)) and 2% (20 mg/mL) Polocaine® DENTAL with Levonordefrin 1:20,000 (mepivacaine hydrochloride 2% (20 mg/mL) with levonordefrin 1:20,000 injection) are sterile solutions for injection. sterile solutions for injection. COMPOSITION: CARTRIDGE Each mL contains: 2% 3% Mepivacaine Hydrochloride 20 mg 30 mg Levonordefrin 0.05 mg - Sodium Chloride 4 mg 6 mg Potassium metabisulfite 1.2 mg - Edetate disodium 0.25 mg - Sodium Hydroxide q.s. ad pH; Hydrochloric 0.5 mg - Acid Water For Injection, qs. ad. 1 mL 1 mL The pH of the 2% cartridge solution is adjusted between 3.3 and 5.5 with NaOH. -
4% Citanest® Plain Dental (Prilocaine Hydrochloride Injection, USP) for Local Anesthesia in Dentistry
4% Citanest® Plain Dental (Prilocaine Hydrochloride Injection, USP) For Local Anesthesia in Dentistry Rx only DESCRIPTION 4% Citanest Plain Dental (prilocaine HCI Injection, USP), is a sterile, non-pyrogenic isotonic solution that contains a local anesthetic agent and is administered parenterally by injection. See INDICATIONS AND USAGE for specific uses. The quantitative composition is shown in Table 1. 4% Citanest Plain Dental contains prilocaine HCl, which is chemically designated as propanamide, N-(2- methyl-phenyl) -2- (propylamino)-, monohydrochloride and has the following structural formula: Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration. The specific quantitative composition is shown in Table 1. TABLE 1. COMPOSITION Product Identification Formula (mg/mL) Prilocaine HCl pH 4% Citanest® Plain Dental 40.0 6.0 to 7.0 Note: Sodium hydroxide or hydrochloric acid may be used to adjust the pH of 4% Citanest Plain Dental Injection. CLINICAL PHARMACOLOGY Mechanism of Action: Prilocaine stabilizes the neuronal membrane by inhibiting the ionic fluxes required for the initiation and conduction of impulses, thereby effecting local anesthetic action. Onset and Duration of Action: When used for infiltration injection in dental patients, the time of onset of anesthesia averages less than 2 minutes with an average duration of soft tissue anesthesia of approximately 2 hours. Based on electrical stimulation studies, 4% Citanest Plain Dental Injection provides a duration of pulpal anesthesia of approximately 10 minutes in maxillary infiltration injections. In clinical studies, this has been found to provide complete anesthesia for procedures lasting an average of 20 minutes. When used for inferior alveolar nerve block, the time of onset of 4% Citanest Plain Dental Injection averages less than three minutes with an average duration of soft tissue anesthesia of approximately 2 ½hours. -
Local Anesthetic Half Life (In Hours) Lidocaine 1.6 Mepivacaine 1.9 Bupivacaine 353.5 Prilocaine 1.6 Articaine 0.5
Local Anesthetics • The first local anesthetics History were cocaine and procaine (Novacain) developed in ltlate 1800’s • They were called “esters” because of their chemical composition • Esters had a slow onset and short half life so they did not last long History • Derivatives of esters called “amides” were developed in the 1930’s • Amides had a faster onset and a longer half life so they lasted longer • AidAmides quiklickly repldlaced esters • In dentistry today, esters are only found in topical anesthetics Generic Local Anesthetics • There are five amide anesthetics used in dentistry today. Their generic names are; – lidocaine – mepivocaine – bupivacaine – prilocaine – artica ine • Each is known by at least one brand name Brand Names • lidocaine : Xylocaine, Lignospan, Alphacaine, Octocaine • mepivocaine: Carbocaine, Arestocaine, Isocaine, Polocaine, Scandonest • prilocaine : Citanest, Citanest Forte • bibupivaca ine: MiMarcaine • articaine: Septocaine, Zorcaine About Local Anesthetic (LA) • Local anesthetic (LA) works by binding with sodium channels in neurons preventing depolarization • LA is inactivated at the injection site when it is absorbed into the blood stream and redistributed throughout the body • If enough LA is absorbed, sodium channels in other parts of the body will be blocked, causing systemic side effects About LA • A clinical effect of LAs is dilation blood vessels, speeding up absorption and distribution • To counteract this dilation so anesthesia is prolonged, , a vasoconstrictor is often added to LAs • However, vasoconstrictors have side effects also Metabolism and Excretion • Most amide LAs are metabolized (inactivated) by the liver and excreted by the kidneys. • Prilocaine is partially metabolized by the lungs • Articaine is partially metabolized by enzymes in the bloo d as well as the liver. -
Classification of Medicinal Drugs and Driving: Co-Ordination and Synthesis Report
Project No. TREN-05-FP6TR-S07.61320-518404-DRUID DRUID Driving under the Influence of Drugs, Alcohol and Medicines Integrated Project 1.6. Sustainable Development, Global Change and Ecosystem 1.6.2: Sustainable Surface Transport 6th Framework Programme Deliverable 4.4.1 Classification of medicinal drugs and driving: Co-ordination and synthesis report. Due date of deliverable: 21.07.2011 Actual submission date: 21.07.2011 Revision date: 21.07.2011 Start date of project: 15.10.2006 Duration: 48 months Organisation name of lead contractor for this deliverable: UVA Revision 0.0 Project co-funded by the European Commission within the Sixth Framework Programme (2002-2006) Dissemination Level PU Public PP Restricted to other programme participants (including the Commission x Services) RE Restricted to a group specified by the consortium (including the Commission Services) CO Confidential, only for members of the consortium (including the Commission Services) DRUID 6th Framework Programme Deliverable D.4.4.1 Classification of medicinal drugs and driving: Co-ordination and synthesis report. Page 1 of 243 Classification of medicinal drugs and driving: Co-ordination and synthesis report. Authors Trinidad Gómez-Talegón, Inmaculada Fierro, M. Carmen Del Río, F. Javier Álvarez (UVa, University of Valladolid, Spain) Partners - Silvia Ravera, Susana Monteiro, Han de Gier (RUGPha, University of Groningen, the Netherlands) - Gertrude Van der Linden, Sara-Ann Legrand, Kristof Pil, Alain Verstraete (UGent, Ghent University, Belgium) - Michel Mallaret, Charles Mercier-Guyon, Isabelle Mercier-Guyon (UGren, University of Grenoble, Centre Regional de Pharmacovigilance, France) - Katerina Touliou (CERT-HIT, Centre for Research and Technology Hellas, Greece) - Michael Hei βing (BASt, Bundesanstalt für Straßenwesen, Germany). -
Pharmacology for Regional Anaesthesia
Sign up to receive ATOTW weekly - email [email protected] PHARMACOLOGY FOR REGIONAL ANAESTHESIA ANAESTHESIA TUTORIAL OF THE WEEK 49 26TH MARCH 2007 Dr J. Hyndman Questions 1) List the factors that determine the duration of a local anaesthetic nerve block. 2) How much more potent is bupivocaine when compared to lidocaine? 3) How does the addition of epinephrine increase the duration of a nerve block? 4) What is the maximum recommended dose of: a) Plain lidocaine? b) Lidocaine with epinephrine 1:200 000? 5) What is the recommended dose of a) Clonidine to be added to local anaesthetic solution? b) Sodium bicarbonate? In this section, I will discuss the pharmacology of local anaesthetic agents and then describe the various additives used with these agents. I will also briefly cover the pharmacology of the other drugs commonly used in regional anaesthesia practice. A great number of drugs are used in regional anaesthesia. I am sure no two anaesthetists use exactly the same combinations of drugs. I will emphasise the drugs I use in my own practice but the reader may select a different range of drugs according to his experience and drug availability. The important point is to use the drugs you are familiar with. For the purposes of this discussion, I am going to concentrate on the following drugs: Local anaesthetic agents Lidocaine Prilocaine Bupivacaine Levobupivacaine Ropivacaine Local anaesthetic additives Epinephrine Clonidine Felypressin Sodium bicarbonate Commonly used drugs Midazolam/Temazepam Fentanyl Ephedrine Phenylephrine Atropine Propofol ATOTW 49 Pharmacology for regional anaesthesia 29/03/2007 Page 1 of 6 Sign up to receive ATOTW weekly - email [email protected] Ketamine EMLA cream Ametop gel Naloxone Flumazenil PHARMACOLOGY OF LOCAL ANAESTHETIC DRUGS History In 1860, cocaine was extracted from the leaves of the Erythroxylon coca bush. -
The Effect of Different Doses of Chloroprocaine on Saddle Anesthesia in Perianal Surgery1
10 – ORIGINAL ARTICLE CLINICAL INVESTIGATION The effect of different doses of chloroprocaine on saddle anesthesia in perianal surgery1 Ying ZhangI, Yang BaoII, Linggeng LiIII, Dongping ShiIV IMaster, Department of Anesthesiology, Shanghai Jiading Central Hospital, Shanghai, China. Conception and design of the study; acquisition, analysis and interpretation of data; manuscript writing, final approval. IIMaster, Department of Anesthesiology, Shanghai Jiading Central Hospital, Shanghai, China. Conception and design of the study, analysis and interpretation of data, critical revision. IIIMaster, Department of Anesthesiology, Shanghai Jiading Central Hospital, Shanghai, China. Histopathological examinations, critical revision. IVMaster, Department of Anesthesiology, Shanghai Jiading Central Hospital, Shanghai, China. Acquisition and interpretation of data, final approval. ABSTRACT PURPOSE: To investigate a saddle anesthesia with different doses of chloroprocaine in perianal surgery. METHODS: Total 60 Patients aged 18–75 years (Anesthesiologists grade I or II) scheduled to receive perianal surgery. Patients using saddle anesthesia were randomized to group A, group B and group C with the same concentration (0.5%) chloroprocaine with different doses 1.0 mL, 0.8 mL and 0.6 mL, respectively. Systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR) and the sensory and motor block were recorded to evaluate the anesthesia effect of chloroprocaine in each group. RESULTS: The duration of sensory block of group C is shorter than those of group A and B. The maximum degree of motor block is observed (group C: 0 level, group A: III level; and group B: I level) after 15 minutes. Besides, there was a better anesthetic effect in group B than group A and group C, such as walking after saddle anesthesia. -
Nerve Blocks for Surgery on the Shoulder, Arm Or Hand
Nerve blocks for surgery on the shoulder, arm or hand Information for patients and families First Edition 2015 www.rcoa.ac.uk/patientinfo Nerve blocks for surgery on the shoulder, arm or hand This leaflet is for anyone who is thinking about having a nerve block for an operation on the shoulder, arm or hand. It will be of particular interest to people who would prefer not to have a general anaesthetic. The leaflet has been written with the help of patients who have had a nerve block for their operation. Throughout this leaflet we have used the above symbol to highlight key facts. Brachial plexus block? The brachial plexus is the group of nerves that lies between your neck and your armpit. It contains all the nerves that supply movement and feeling to your arm – from your shoulder to your fingertips. A brachial plexus block is an injection of local anaesthetic around the brachial plexus. It ‘blocks’ information travelling along these nerves. It is a type of nerve block. Your arm becomes numb and immobile. You can then have your operation without feeling anything. The block can also provide excellent pain relief for between three and 24 hours, depending on what kind of local anaesthetic is used. A brachial plexus block rarely affects the rest of the body so it is particularly advantageous for patients who have medical conditions which put them at a higher risk for a general anaesthetic. A brachial plexus block may be combined with a general anaesthetic or with sedation. This means you have the advantage of the pain relief provided by a brachial plexus block, but you are also unconscious or sedated during the operation. -
Chapter 17 Spinal, Epidural, and Caudal Anesthesia
Chapter SPINAL, EPIDURAL, AND 17 CAUDAL ANESTHESIA Alan J.R. Macfarlane, Richard Brull, and Vincent W.S. Chan PRINCIPLES COMBINED SPINAL-EPIDURAL ANESTHESIA PRACTICE Technique ANATOMY CAUDAL ANESTHESIA Spinal Nerves Pharmacology Blood Supply Technique Anatomic Variations COMPLICATIONS MECHANISM OF ACTION Neurologic Drug Uptake and Distribution Cardiovascular Drug Elimination Respiratory PHYSIOLOGIC EFFECTS Infection Cardiovascular Backache Central Nervous System Nausea and Vomiting Respiratory Urinary Retention Gastrointestinal Pruritus Renal Shivering Complications Unique to Epidural Anesthesia INDICATIONS Neuraxial Anesthesia RECENT ADVANCES IN ULTRASONOGRAPHY Neuraxial Analgesia QUESTIONS OF THE DAY CONTRAINDICATIONS Absolute Relative PRINCIPLES SPINAL ANESTHESIA Factors Affecting Block Height Spinal, epidural, and caudal blocks are collectively referred Duration of the Block to as central neuraxial blocks. Significant technical, physi- Pharmacology ologic, and pharmacologic differences exist between the Technique techniques, although all result in one or a combination of Monitoring of the Block sympathetic, sensory, and motor blockade. Spinal anes- EPIDURAL ANESTHESIA thesia requires a small amount of drug to produce rapid, Factors Affecting Epidural Block Height profound, reproducible, but finite sensory analgesia. In Pharmacology contrast, epidural anesthesia progresses more slowly, is Technique commonly prolonged using a catheter, and requires a large amount of local anesthetic, which may be associated with The editors and publisher would like to thank Drs. Kenneth Dras- ner and Merlin D. Larson for contributing to this chapter in the previous edition of this work. It has served as the foundation for the current chapter. 273 Downloaded for Wendy Nguyen ([email protected]) at University Of Minnesota - Twin Cities Campus from ClinicalKey.com by Elsevier on March 26, 2018. For personal use only. -
Spinal Anaesthesia for Laparoscopic Cholecystectomy
Rev. Col. Anest. Mayo-Julio 2009. Vol. 37- No. 2: 111-118 Spinal anaesthesia for laparoscopic cholecystectomy PatIents and MethOds • Patients aged less than 18 and older than 75; -2 • Patients having greater than 30 Kg/m body A descriptive prospective study was carried out mass index (BMI); between June and September 2008 in the Caribe teaching hospital in the city of Cartagena in Co- • Sick patients having contraindication for lapa- lombia, South America. Once the Caribe teaching roscopic surgery; hospital’s medical ethics’ committee’s approval had • Patients having contraindication for spinal been sought and given, patients were included in anaesthesia; the study who had biliary lithiasis accompanied by a clinical picture of chronic cholecystitis as well as • Patients who preferred general anaesthesia; those having a clinical picture of subacute cholecys- and titis diagnosed during preoperative exam. • An inability for carrying out postoperative follow- Patients who had been previously diagnosed as up. having complicated biliary lithiasis (acute chole- Inclusion criteria consisted of ASA I – II patients cystitis, choledocolithiasis, acute cholangitis, acute aged 18 to 75. All the patients complied with a biliary pancreatitis, etc.) were excluded. Other ex- minimum 8 hours fast; antibiotic prophylaxis was clusion criteria were as follows: 115 Anestesia espinal para colecistectomia laparoscópica - Jiménez J.C., Chica J., Vargas D. Rev. Col. Anest. Mayo-Julio 2009. Vol. 37- No. 2: 111-118 administered 15 minutes before the procedure (1 g tolerance to oral route had been produced and the intravenous cephazoline) anaesthesiologist had verified the absence of any type of complication. All patients were prescribed ANAESTHETIC TECHNIQUE ibuprofen as analgesia to be taken at home (400 mgr each 8 hours for 3 days). -
Meta-Xylene: Identification of a New Antigenic Entity in Hypersensitivity
Clinical Communications Meta-xylene: identification of a new Our patient is a 53-year-old male who presented in 2003 with antigenic entity in hypersensitivity contact dermatitis after the use of lidocaine and disinfection with reactions to local anesthetics chlorhexidine. In 2006, an extensive skin testing by patch, prick, Kuntheavy Ing Lorenzini, PhDa, intradermal sampling, and graded challenge was performed as b c followed. The patch tests were performed with the thin layer Fabienne Gay-Crosier Chabry, MD , Claude Piguet, PhD , rapid use epicutaneous test, using the caine mix (benzocaine, a and Jules Desmeules, MD tetracaine, and cinchocaine), the paraben mix (methyl, ethyl, propyl, butyl, and benzylparaben), and the Balsam of Peru. The Clinical Implications caine and paraben mix were positive, and the patch test was possibly positive for Balsam of Peru. The prick test performed The authors report a patient who presented delayed with preservative-free lidocaine 20 mg/mL (Lidocaïne HCl hypersensitivity reactions to several local anesthetics, all “Bichsel” 2%, Grosse Apotheke Dr. G. Bichsel, Switzerland) was containing a meta-xylene entity, but not to articaine, negative. The intradermal test, performed with lidocaine 20 mg/ which is a thiophene derivative. Meta-xylene could be the mL containing methylparaben (Xylocain 2%, AstraZeneca, immunogenic epitope. Switzerland) with 1/10 and 1/100 dilutions, was negative. The subcutaneous challenge test was performed with 10 mg of preservative-free lidocaine 20 mg/mL (Lidocaïne HCl “Bichsel” TO THE EDITOR: 2%, Grosse Apotheke Dr. G. Bichsel) and lidocaine 20 mg/mL containing methylparaben (Lidocaïne Streuli 2%, Streuli, Hypersensitivity reactions to local anesthetics (LAs) are rare and Switzerland), both of which were positive and had the appear- represent less than 1% of all adverse reactions to LAs.