Anaesthesia of the teat in cattle

Question 1

Ring Block of the Teat Base

General Considerations

Answer 1

• The most commonly used anesthetic technique under field conditions
• All teat surgeries → removal of udder hair

Question 2

Ring Block of the Teat Base

Materials

Answer 2

• 0.25- to 0.5-inch, 22- to 24G needles
• 5- to 10-ml plastic syringes
• 2% lidocaine (epinephrine optional)

Question 3

Ring Block of the Teat Base

Preinfusion Procedures

Answer 3

• Standing restraint + tail tie + rear leg restraint
• IV sedation or analgesia is indicated
• Thoroughly cleanse the surgical area

Question 4

Ring Block of the Teat Base

Technique

Answer 4

• Infusion of several ml of 2% lidocaine into both the skin and the deeper musculature
• Allow a minimum of 5 minutes for anesthesia

Question 5

Inverted V Block over the Surgical Area

General Considerations

Answer 5

• For teat lesion is specific

Question 6

Inverted V Block over the Surgical Area

Materials

Answer 6

Same as for the ring block

• 0.25- to 0.5-inch, 22- to 24G needles
• 5- to 10-ml plastic syringes
• 2% lidocaine (epinephrine optional)

Question 7

Inverted V Block over the Surgical Area

Preinfusion Procedures

Answer 7

Same as for the ring block

• Standing restraint + tail tie + rear leg restraint
• IV sedation or analgesia is indicated
• Thoroughly cleanse the surgical area

Question 8

Inverted V Block over the Surgical Area

Technique

Answer 8

• Infuse both the skin and musculature
• Be careful to infuse the lidocaine in normal not in inflammatory tissue
• Allow a minimum of 5 minutes for anesthesia

Question 9

Teat Cistern Infusion

General Considerations

Answer 9

• Only mucous membranes (e.g., polyps)
• Musculature or skin are not
• Intact mucous membranes

Question 10

Teat Cistern Infusion

Materials

Answer 10

• Heavy rubber band
• Sterile teat tube
• 2% lidocaine (without epinephrine)
• 10- to 20-ml syringe

Question 11

Teat Cistern Infusion

Technique

Answer 11

• Rubber band on the base of the teat
• Remove milk from teat and cleaning
• Insert a sterile teat tube
• 10 ml of 2% lidocaine, than remove the teat tube
• Allow approximately 5 minutes for anesthesia
• Milk out the 2% lidocaine
• Remove the tourniquet

Question 12

Vascular (Local) Infusion

General Considerations

Answer 12

• A recently described technique
• All tissues
• Success may be limited:
o need for adequate teat size and environmental conditions (warm weather)

Question 13

Vascular (Local) Infusion

Preinfusion Procedures

Answer 13

Same as for the ring block

• Standing restraint + tail tie + rear leg restraint
• IV sedation or analgesia is indicated
• Thoroughly cleanse the surgical area

Question 14

Vascular (Local) Infusion

Materials

Answer 14

• Heavy rubber band
• 0.25- to 0.5-inch, 22- to 24G needle
• 5- to 10-ml plastic syringe
• 2% lidocaine (without epinephrine)

Question 15

Vascular (Local) Infusion

Technique

Answer 15

• Place a rubber band
• Venous enlargement (venous plexus) just distal to tourniquet
• Infuse approximately 3 to 5 ml of 2% lidocaine IV (into the venous plexus)
• Anesthesia will occur in several minutes
• Surgery and remove the rubber band

Question 16

Vascular (Local) Infusion

Effectiveness

Answer 16

• Not effective: teat lesion → abnormal circulation (e.g., laceration of the teat wall)
• Short time surgical procedures (e.g., teat orifice surgery)