Principles of Large Animal Surgery Flashcards
What is the most important thing to reduce post-op infections?
Good surgical technique
Oxytetracycline covers what spectrum of antimicrobial?
Gram positive and negative
Is Oxytetracycline bacteriostatic and bactericidal?
Bacteriostatic
What is the withdrawal time of Oxytetracycline?
Meat: 28 days
Milk: 4 days
Penicillin covers which spectrums of organism?
A. pyogenes and anaerobes
NOTE: Not effective against Gram negative
Is Penicillin bacteriostatic or bactericidal?
Bactericidal
What is the withdrawal time of Penicillin?
Meat: 16 days
Milk: 5 days
Ceftiofur covers which spectrum of organism?
Gram positive and negative
NOTE: Includes beta-lactamase producing strains
You can add Penicillin to Ceftiofur as your antimicrobial protocol for which procedure?
Enterotomy
Which form of Ceftiofur has no withdrawal time?
Ceftiofur sodium (Naxcel)
What is the withdrawal time of Ceftiofur hydrochloride (Excenel)?
Meat: 2 days
Milk: None
Flunixin meglumine is labeled for what three things for cattle in the USA?
Pyrexia, endotoxemia, mastitis
What is the withdrawal time of flunixin meglumine?
Meat: 4 days
Milk: 36 hours
Ketoprofen is only labeled for cattle in the USA for what?
Pyrexia in bovine respiratory disease
Which demographic of animals can Ketoprofen NOT be used in?
Dairy cattle older than 1 year
What is the withdrawal time of Ketoprofen?
Meat: 48 hours
Meloxicam is labeled for use in cattle in Canada for what?
Castration
Which demographic of animals is Meloxicam NOT to be used in?
Lactating dairy cattle or veal calves
What is the withdrawal time for Meloxicam?
At least 35 days
Which species is tetanus prophylaxis MOST important?
Horses and lambs
What are the two challenges of GA for equines during induction?
- Experienced handlers
- Appropriate facilities
What are the four challenges of GA for equines during the procedure?
- Hypotension
- Hypoxemia
- Myopathy
- Neuropathy
What is the challenge of GA for equines during recovery?
Injuries
What challenge does GA have on a bovine’s rumen?
- Bloat
- Regurgitation
- Ventilation
What challenges does the weight of a bovine have during GA?
- Myopathy
- Neutropathy
What should we be concerned with when using anesthetic agents in bovine patients?
Withdrawal periods
What is the anesthetic technique where a linear infiltration is made along the incision line?
Line Block
What are the four disadvantages of using a line block?
- Less effective in inflamed tissues
- Edema can distort incision causing difficulty of closing
- Wound healing delayed
- Large volume of LA needed
When performing the Inverted L-block, what are your landmarks?
Ventrolateral aspect of lumbar transverse processes and caudal aspect of last rib
What are the two advantages for the Inverted L-block technique?
- Do edema or hematoma formation
- Does not affect healing
What are the two disadvantages of the Inverted L-block technique?
- Possible incomplete analgesia and muscle relaxation of deeper layers
- VERY large volume of LA
When performing regional anesthesia, what is being desensitized?
Peripheral nerves
When performing a proximal paravertebral block, where do you place your needle?
Caudal border of T13, L1, and L2 transverse processes
What are three complications of the proximal paravertebral block?
- Scoliosis
- Moderate ataxia
- Penetration of blood vessels
When performing a distal paravertebral block, where do you place your needle?
Parallel to tip of transverse processes of L1, L2, and L4
Does scoliosis occur when performing a distal paravertebral block?
No
True or False: With the Bier block technique, it is appropriate to use epinephrine.
False
What are the three risks of using the Bier block technique?
- Systemic toxicity
- Ischemia and persistent lameness
- Reperfusion injury/collapse
What two locations can you use when performing an epidural?
- Sacrococcygeal joint
- Between 1st and 2nd intercoccygeal space
What structures are anesthetized during a caudal/low epidural?
- Pelvic viscera
- Genitalia
- Perianal region
What structures are anesthetized during an anterior/high epidural?
- Hindlimbs
- Mammary tissue
- Flank
- Abdominal wall