Gynaecology and Obstetrics Section

 EPIDURAL ANAESTHESIA

Cattle

• Injection site - Sacrococcygeal space  
• Sacrococcygeal space in located by moving the tail up and down and feeling for depression between the last sacrum and and first Coccygeal vertebra. 
• Clipping and surgical preparation of the injection site. 
• Placement of a needle 18G , of one and half  inch in size is used . The needle is inserted into the site at an angle of 45⁰ . The hub of the needle should be angled slightly posteriorly. The correct placement of the needle is tested by gauging the ease with which the plunger can be compressed. 
• Injection of the anesthetic solution should be done easily with minimal resistance 
• Drug commonly used is 2% lignocaine

Indications

• To prevent defecation reflex during correction of dystocia
• To prevent straining during correction of dystocia
• To produce loss of sensation around the perineum

Dose

• Posterior epidural block- 3-5 ml
• In posterior epidural anaesthesia of the regions around the perineum,vulva and tail are obtained
  
• Anterior epidural block 6-10 ml
• In anterior epidural block anaesthesia of the regions up to the paralumbar fossa are obtained

Goat

• Injection site -Sacrococcygeal space  
• Drug commonly used is 2% lignocaine - 1-2 ml

Dog    

• Injection site - Lumbo Sacral space
• Drug commonly used is 2% lignocaine - 0.5 -1ml