Exam 1 Flashcards
(44 cards)
Drugs For Pain Relief in Ruminants
- Lidocaine only thing approved for intraop (All others are ELDU)
- Banamine is used for foot rot but can be used post op ELDU
- Use FARAD
Preparing Ruminant Surgical Site
- Clip hair (don’t shave)
- Tie tail
Rough
o Remove dirt and debris
o Mild soap & brush
Sterile
o Chlorhex or povidine
o Contact time important
Draping
o Use water impermeable
Post-op Feeding of Ruminants
- Usually on 60:40 roughage to grain
- Post-op give full roughage and slow intro to grain
- Return neonates to regular feed (milk) & monitor weight
Fluids for Ruminants
- Adults: 60ml/kg/day
- Neonates: 90 ml/kg/d
Disbudding Goats; When, Nerve Supply, Issues
o Look for two twists of hair
o Bucks at 3d
o Does at 5-7d
o Tetanus prophylaxis
Nerve Supply
* Corneal nerve beneath temporal line
* Infratrochlear nerve above rim of orbit
* Block 4 nerves w/ 1ml lidocaine
* Careful w/ lidocaine in small goats
Issues
* No frontal sinus to protect brain
* Burns
* Hemorrhage from not stopping bleeders
* Don’t give too much xylazine
Disbudding Cows; When, procedure
o Before 3 wks
o Give 3 tabs meloxicam
o 4-6ml lidocaine in each corneal nerve
o don’t keep dehorner on longer than 10secs
o if done in adults -> frontal sinus exposed
Docking Sheep; Purpose, When, Issues
o Eliminate manure buildup & fly strike
o w/in first 48hrs of life (to a few days)
Issues
* Too short -> prolapse
Castration; Precautions, Analgesia options
o Use tetanus antitoxin
o testicular block
o ring block
Repair Nose Ring Tear
o Older than 6hrs? -> treat as second intension
o Sedate w/ xylazine & acepromazine
o Infuse nose or bilateral infraorbital nerve block w/ lidocaine
o Place 2-3 horizontal mattress sutures
o Place simple interrupted between mattress as needed
o Never remove sutures
Sinusitis; Treatment
- Lavage w/ “weak tea” diluted betadine
- Trephination?
How to: Trephination
- Goal is to establish drainage
- Clip and prep w/ Betadine/povidine
- Local infusion of lidocaine
- Small (~2cm) circular incision thru skin down to bone
- Galt trephine thru bone into sinus
Llama Lullaby
o 10ml ketamine
o 1ml xylazine
o 1ml butorphanol
Mandibular Tooth Root Abcsess; Diagnosis, Treatment; Surgical Approaches
Diagnosis
* Oral exam
* imaging
* Check PCV pre-surgery
Treatment
* Ceftiofur or florenicol for 4-6wks
* Meloxicam or Banamine for 1-2wks
Surgical Approach
* Performed under general anasthesia
* Ventrolateral buccal approach (recommended)
* Retropulsion of tooth (Not in mandibular cheek teeth)
* Oral extraction (Only for extremely loose teeth)
* Post-op, Flush incision with warm water/dilute betadine until no longer communicating with mouth/hole closes & give antibiotics 1-2 weeks
Squamous Cell Carcinoma; Locations, Diagnosis, Treatment
Locations
* 3rd eyelid
* limbus
* lower lid
* conjunctiva
Diagnosis
* Ocular exam
* Fluorescein stain
* Manual palpation of orbit
Treatment
* Cryosurgery
* 3rd eyelid removal
* enucleation (if invading eye)
How to: 3rd Eyelid Removal
- Auriculopalpebral block, topical on cornea & 3rd, or lidocaine injected into 3rd
- Light sedation
- Place hemostats on dorsal & ventral edge of 3rd eyelid
- Sharp dissection w/ scalpel
- Leave hemostats in place for 2-3mins
How to: Enucleation
- Ring block
- Retrobulbar infusion
- 3(4) point block OR Petersen block (technically challenging)
- Suture or clamp eyelids shut ->
- Use scalpel to make elliptical incision ->
- Dissect tissue out w/o entering eyeball
Corneal Ulcer; Causes, Treatment
Cause
* Pink eye
* Trauma
* entropion
* Other bacteria
Treatment
* Medical management
* 3rd eyelid flap
* enucleation
* entropion repair
How to: Emergency Tracheotomy
o Junction of cranial and middle third of neck
o Head restrained vertically
o Line block with lidocaine
o Sternohyoideus and sternothyroideus muscles split on midline
o Incise between tracheal ring
o Use of stylet to introduce largest tube that will fit
o Cuffed tubes are NOT inflated
o Changed / cleaned 2-3 times daily
o Antibiotics & NSAIDs
Left Displaced Abomasum; Basics, Clinical Signs, Diagnosis, Treatment
o Goes under rumen and stays between rumen and left body wall
o No severe occlusion or vascular compromise
o Not an emergency
Clinical Signs
* Sunken eyes & elevated ribs on L
* Ketotic, hypocalcemic, hypochloremic
* Dry feces maybe
Diagnosis
* Ping
* Tube test
* Endoscopy, ultrasound, or exploratory sx
Treatment
* Toggle
* Right paralumbar omentopexy/pyloropexy
* Left paralumbar abomasopexy
* Paramedian abomasopexy
R Abomasal Volvulus; Clnical Signs, Diagnosis, Treatment
Clinical Signs
* Increased HR & RR
* Sunken eyes
* Maybe down
Diagnosis
* Ping
* Tube test
* Endoscopy, ultrasound, or exploratory sx
Treatment
* Right paralumbar omentopexy/pyloropexy
* Paramedian abomasopexy
Pros & Cons of a Toggle
Pros
* Cheap
* Easy
* Good prognosis/rapid return to normal
* Pexy abomasum @ anatomical location
Cons
* Need multiple people
* Potentially toggle wrong organ
* Roll complications
* Can’t use on RDA, RAV, heavy or pregnant cows
Pros & Cons of R Side Approach Surgery for Displaced Abomasum
Pros
* Good prognosis/rapid return to normal
* Can do alone
* Can perform prophylaxis pexy
* Good for LDA, RDA, RAV
Cons
* LDA harder to reach
* Difficult to break adhesions on L
* Not goof for heavy/[regnant cows w/ LDA
* Pexy not at anatomical location
Pros & Cons of L Side Approach Surgery for Displaced Abomasum
Pros
* Good prognosis
* Rapid return to normal
* Pexy at anatomical position
* Good for heavy pregnant cow with LDA
Cons
* Only for LDA
* Cannot do anything if no DA
* Difficult to pull needle
* Size difficulties
Pros & Cons of Paramedian Approach for Displaced Abomasum
Pros
* Good prognosis
* Rapid return to normal
* Can be used for LDA, RDA or RAV
* Pexy at anatomical position
Cons
* Have to put cow on dorsal and keep the cow there