Anesthesia and Analgesia for Veterinary Technicians, 4th Edition

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Anesthesia and Analgesia for Veterinary Technicians, 4th Edition


This guide to the principles of anesthesia administration in animals combines user-friendly coverage of essential information with an outstanding illustration program and improved readability. Anesthesia and Analgesia for Veterinary Technicians, 4th Edition prepares you to administer anesthesia with information on pre-anesthetic preparation of the patient, induction procedures, monitoring animals’ vital signs during the anesthetic period, and postoperative care. Expert authors John A. Thomas, DVM, and Phillip Lerche, BVSc PhD, Dipl ACVA, also include discussions of actions and side effects of anesthetic agents, the physiology of respiration, heart rate and blood pressure, emergency response, anesthetic equipment, and specialized techniques.


  • Comprehensive scope of coverage includes both large and small animals.
  • A reading level and depth of information appropriate for the technical level.
  • Easy-to-read, user-friendly format makes this a practical guide in the classroom or in practice.
  • Objectives, key points, and review questions help reinforce learning.
  • Focus on health and safety issues satisfies OSHA requirements.
  • Step-by-step procedures boxes clarify the technician's role in anesthesia delivery.
    • New organization and completely updated techniques, drugs, and equipment keep you up-to-date on the latest advances in the field.
    • 49 new procedures boxes, 20 anesthetic protocol boxes, and 5 case studies help you apply knowledge to real-life situations.
    • Two new large animal chapters cover pain management and anesthetic techniques for equine and ruminant patients.
    • Illustrated, step-by-step procedures and the full-color format make this text inviting and user-friendly.
    • All new figures and 4-color art make the material easy to understand and visually appealing.
    • New material in every chapter incorporates the expanding role of veterinary technician anesthetists, especially in referral practices, teaching institutions, and research.
    • Chapter outlines and Technician Tips emphasize key information and highlight key terms in the glossary.
    • Student resources on the Evolve website include a video animation that demonstrates the use and maintenance of different anesthesia machines.
      1. Introduction to Anesthesia

        History of anesthesia

        The Veterinary Technician’s Role in the Practice of Anesthesia

      2. Patient Preparation

      Communication—A Key to Success

      The Minimum Patient Database

      Patient History

      Physical Examination and Physical Assessment

      Preanesthetic Diagnostic Workup

      Determination of the Physical Status Classification

      Selection of the Anesthetic Protocol

      Preinduction Patient Care

      Withholding Food before Anesthesia

      Patient Stabilization

      Intravenous Catheterization

      Reasons for Intravenous Catheterization

      Choosing and Placing an Intravenous Catheter

      Fluid administration

      Composition of Body Fluids

      Fluid Homeostasis

      Fluid Needs

      Classification of IV Fluids

      IV Fluid Selection and Administration Rates

      Adverse Effects of Fluid Administration

      Calculating Fluid Administration Rates

      Other Preanesthetic Care

      • Anesthetic Agents and Adjuncts

      Introduction to Anesthetic Agents and Adjuncts

      Agonists, Partial Agonists, Mixed Agonist-Antagonists, and Antagonists

      Analgesic Effects of Anesthetics and Adjuncts

      Using drugs in combination

      Regulatory Considerations for Controlled Substances

      Preanesthetic Medications

      Reasons for the use of preanesthetic medications


      Tranquilizers and Sedatives



      Opioid Antagonists

      Injectable Anesthetics



      Dissociative anesthetics



      Inhalation Anesthetics

      Classes of Inhalation Agents

      CNS and Respiratory Stimulants


      • Anesthetic Equipment

      Endotracheal Tubes and Associated Equipment

      Endotracheal tube parts



      Anesthetic Chambers

      Anesthetic Machines

      Components of the Anesthetic Machine

      Rebreathing Systems

      Non-rebreathing Systems

      Operation of the Anesthetic Machine

      Care and Maintenance of Anesthetic Equipment

      • Anesthetic Monitoring

      Introduction to Monitoring

      Stages and Planes of Anesthesia

      Overview of Anesthetic Stages and Planes

      Finding the Optimum Depth

      Determining whether or not the Patient is Safe

      Indicators of Circulation

      Heart rate

      Heart rhythm

      Capillary refill time

      Blood Pressure

      Pulse strength

      Indicators of Oxygenation

      Mucous membrane color

      Physiology of Oxygen transport

      Pulse Oximeter

      Blood Gas Analysis

      Indicators of Ventilation

      Respiratory rate

      Tidal volume

      Respiratory Character

      Apnea monitor

      Capnograph (End-tidal CO2 monitor)

      Blood gas analysis

      Indicators of Body Temperature

      Assessment of Anesthetic Depth

      Reflexes and Other Indicators of Anesthetic Depth

      Judging Anesthetic Depth

      Recording Information during Anesthesia

      • Special Techniques

      Local anesthesia

      Local anesthetic agents

      Characteristics of local anesthetics


      John Thomas, DVM, Assistant Professor, Veterinary Technology, Cuyahoga Community College, Cleveland, OH and Phillip Lerche, BVSc, PhD, Dipl ACVA, Assistant Professor, Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH
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