Surgery & Anesthesia in Animal Health: Principles, Planning, and Safe Patient Care

Surgery

Intentional use of physical techniques (incision, removal, repair, reconstruction) to diagnose or treat disease and injury.

Indication

A clear surgical indication answers what problem is being fixed and what outcome counts as success.

Emergency surgery

Surgery that addresses an immediate threat to life or limb.

Urgent surgery

Surgery that should occur soon to prevent complications.

Elective surgery

Surgery that is planned when the patient is optimized.

Anesthesia

Drug-induced unconsciousness and/or immobility.

Signalment

Species, breed, age, sex information affecting airway anatomy and disease risk.

Preoperative assessment

Process of predicting how a patient will tolerate anesthesia and surgical stress.

Hematology

Laboratory tests analyzing blood components to detect anemia, infection, or inflammation.

Fasting

Reducing stomach contents preoperatively to minimize regurgitation and aspiration risks.

Shock

A state of inadequate perfusion that may require fluid therapy.

Asepsis

Practices aimed at preventing contamination by microorganisms during procedures.

Surgical wound classification

Categorization based on microbial risk: clean, clean-contaminated, contaminated, dirty/infected.

Sterilization

Process that eliminates all microbial life including spores.

Disinfection

Process that reduces microbial load but may not kill spores.

Closure under tension

Wound closure that is too tight, risking dehiscence.

Multimodal analgesia

Combine different pain control methods to enhance analgesia and minimize drug doses.

Infection control

Methods aimed at preventing surgical site infections, including maintaining a sterile field.

Dehiscence

Wound separation that can occur due to tension, infection, or improper suture placement.

Local anesthetics

Agents that provide analgesia by blocking nerve conduction.

Endotracheal intubation

Procedure securing the airway to enable oxygen and anesthetic delivery.

Capnography

Monitoring method that assesses end-tidal CO₂ to evaluate ventilation.

Fluid therapy

Administering fluids to support perfusion and maintain hydration.

Hypotension

Low blood pressure that can compromise tissue perfusion and oxygen delivery.

Pain assessment

Evaluating an animal’s pain through behavior and physiological signs.

Hypothermia

Low body temperature that can occur under anesthesia, affecting recovery and metabolism.

Emergency response

Immediate actions taken to address anesthesia or surgical complications.

Scavenging system

Component of anesthesia machines that removes waste anesthetic gases.

Recovery monitoring

Supervising the patient post-anesthesia to manage complications.

Premedication

Medications given prior to anesthesia to reduce anxiety and provide analgesia.

Induction

Transitioning a patient to a state suitable for surgery, including intubation.

Maintenance anesthesia

Ongoing administration of anesthetic agents to keep patient unconscious.

Primary wound closure

Immediate suturing after wounding.

Secondary intention healing

Wound healing process where wounds are left open to granulate.

Seroma

A fluid-filled pocket that can form under a closed wound.

Epidural

Anesthesia technique providing regional analgesia by injecting into the spinal area.

Suture material

Material used for approximating tissues during closure, available in absorbable and nonabsorbable types.

Instrumentation

Surgical tools categorized for tasks like cutting, grasping, clamping, and retracting.

Patient stabilization

Correcting medical conditions before anesthesia to reduce anesthetic risks.

Brachycephalic airway syndrome

Anatomic anomalies in brachycephalic breeds that increase anesthesia risk.

Analgesia

Pain relief methods used before, during, and after surgical procedures.

Monitoring parameters

Observing variables such as heart rate and blood pressure to assess anesthetic depth.

Informed consent

Process of ensuring the owner understands surgical risks and benefits before proceeding.

Surgical assistants

Support personnel who help maintain exposure and manage instruments during procedures.

Recovery complications

Potential issues (e.g., obstruction, hypothermia) that may emerge post-anesthesia.

Tradeoff in fasting

Balancing between reducing stomach volume and maintaining stable glucose and hydration.

Hand antisepsis

Technique that reduces the risk of surgical site infections through hand cleansing.