What is the primary action of lidocaine when used as a local anaesthetic in veterinary surgery?
Correct answer: B. Blocking voltage-gated sodium channels
- A. Stimulating acetylcholine receptors
- B. Blocking voltage-gated sodium channels
- C. Increasing calcium entry into nerves
- D. Inhibiting prostaglandin synthesis
Explanation
Lidocaine prevents the generation and conduction of nerve impulses by blocking voltage-gated sodium channels. Prostaglandin inhibition is mainly associated with nonsteroidal anti-inflammatory drugs, not local anaesthetic action.
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About Veterinary Surgery
Covers principles of asepsis, tissue handling, haemostasis, wound healing, surgical instruments, sutures, anaesthesia and perioperative care. It includes common procedures and conditions involving the skin, abdomen, bones, joints and urinary or reproductive tracts, while distinguishing surgical emergencies from cases managed medically.
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