Zoo And Wildlife Anesthesia Flashcards
What safety precautions should you take for accidental human exposure to capture drugs?
Ideally two vets at a time —> a drop of thiafentanil on the cornea could lead to cardiopulmonary arrest in 60 second
Have full antagonists available
What are must you concider in regards to animal safety?
Ambient conditions
Excessive heat or cold
Bloat
Noise stress
Lacerations from running aimlessly in panic
Work quickly to minimize stress on wildlife
What is the range of a pole syringe?
3-4meters
What is the range of a blow pipe?
10-15meters
What are the two types of dart projectors ?
Pistol
Rifle
What is the range of a pistol dart projector?
1-25meters
What is the range of a rifle dart projector?
5-60meters
What would be the best choice of equipment to use on an animal in an enclosed or small animals in close range?
Pole syringe
What would be the best choice of equipment to anesthetize small animals that are at a distance?
Blow pipe
- dart guns are helpful at a distance but cause excessive tissue damage in small, thin skinned animals
What equipment would you use for a large herbivore at long range?
Dart rifle
Dart projectors are powered by??
Compressed gas (CO2, butane, air)
Powder
What is the biggest determinant of force of a dart projector?
Velocity
Flip for good tip..
Aim of dart projection is to cause minimal tissue trauma with appropriate impact for drug delivery
What are causes of dart failures?
Dart: not firing, blocked needle, sticky plunger
Drug: improper site/drug interactions
Aerodynamics: deflection while spinning in flight, wind factor, objects deflecting dart
Animal injury : bone fracture, hemorrhage, intrathoracic injection
What drugs are commonly used for immobilizers ?
Potent opioids and cyclohexamines
What are common drugs used for tranquilizers?
Phenothiazines and butyrophenones
What are commonly used drugs for used as sedatives?
Benzodiazepines and A2 agonsits
What opioids are appropriate for used in capture of large mammals (eg megaherbivores)
Etrophine
Carfentanil
Thiafentanyl
effective in very small volumes
POTENT
What are the adverse effects of opioids?
Life threatening respiratory depression!
Excitement Muscle rigidity or tremors Hyperthermia Increased BP Elevated heart rate Decreased gut motility Nausea
What is renarcotizaiton?
Recurrence of signs of opioid induction and sedation in varied time after administration of opioid antagonist
What species are sensitive to opioids?
White rhino Giraffe Hippo Impala Mini antelope Waterbuck
How can you help to manage the adverse effects of opioids?
Partial reversal with butorphanol
What are signs of renarcotizaiton?
High-stepping Star gazing Pacing Decreased response to stimuli Sedation May become recumbent
What are causes of renarcotizaiton?
Inadequate dose of opioid antagonist
Inappropriate antagonist
Imbalances at opioid receptor
How can you treat renarcotizaiton
Repeat dose of antagonist
What type of drug is diprenorhine?
Pure mu antagonist
What are the dissociative drugs?
Cyclohexamines
- ketamine
- tiletamine
What are the most commonly used agent for induction of general anesthesia in feral carnivores?
Dissociative drugs
Cyclohexamines
-ketamien
-tiletamine
Which has higher potency, ketamine or telzaol?
Telzaol
What is in telazol?
Tiletamine and zolazepam
T/F: telazol causes excitement during recovery
True
What are the uses of butyrophenones and phenothiazines in wildlife?
Adjunct to opioid for immobilization
Tranquilizer for captive herbivores to minimize stress
What are common adverse effects of butyrophenones and phenothiazines ?
Extrapyramidal signs
- ataxia
- allotriophagia
- torticollis
- tremors
- star gazing
What drugs are butyrophenones ?
Azaperone
Haloperidol
What are the short acting phenothiazines?
Acepromazine
Propionylpromazine
What are the long acting phenothiazines?
Zuclopenthioxol acetate (acuphase)
Onset 1-2hrs
Duration 1.5-3 days
Perphenazine enanthate (trifalon)
Onset 12-36hours
Duration 7-10days
What is the only drug that diazepam can be mixed with?
Ketamine
IV route recommended
T/F: diazepam can be given in feed preparations to carnivores and herbivores
True
T/F: midazolam can only be mixed with ketamine
False
What is zolazepam used for?
Carnivore immobilization
Why is midazolam preferred to diazepam?
Can be given IM
What are the A2 antagonists?
Atipamezole
Yohimbine
What A2 is commonly used in carnivores?
Medetomidine
What A2 is commonly used in herbivores and is more potent than xylazine, but can cause pronounced ataxia?
Detomidine
What A2 commonly used in herbivores does to produce much ataxia?
Romifidine
How long do the effects of xylazine work?
Effects for 1-2hours
Analgesia for 30mins
How are A2 antagonists administered?
IM
Really slow IV (partial)
Which has a shorter half life, atipamezole or medetomidine ?
Atipamezole
What are the attributes of an ideal immobilizing drug?
Potency Rapid onset Safety : therapeutic index Minimal adverse effects Stable under various ambient conditions Miscible with other drugs Reversible effects
What are the best drug combinations for large mammals?
Opioids with tranquilizers
What is the best drug combo for small mammals
Potent opioids with
- tranquilizer
- ketamine
- telzaol with A2 agonsit
- benzodiazepines
What is the best drug combinations for carnivores and felids?
Ketamine or Telazol with A2 agonists or benzodiazepines
What is the best drug combo in primates?
Ketamine or telazol with A2 agonsit or benzodiazepines
What are common adverse effects seen with opioids in white rhinos?
Muscle tremors, rigidity, hypoxemia, hyperthermia
What can you use to immobilize a white rhino?
Etorphine + azaperone
Can supplement with isoflurane or ketamine
This drug combo used for immobilization in white rhino can be partial reversed with??
Etorphine + azaperone
Can supplement with isoflurane or ketamine
Butorphanol IV
How do the effects of opioids in black rhinos compare to those in white rhinos?
Black rhinos have..
Decreased respiratory depression
Depressed muscle rigidity
Typically more excitable
-smaller body mass
What drug combinations can be used for immobilization in black rhinos?
Etorphine + azaperone
Etorphine + detomidine
Carfentanil