euthanasia roundtable - the iwrc
TRANSCRIPT
1/9/2015
1
Lethal LoveDignity in Death
How Euthanasia Can Save Lives (Including Your Own!)
Main Goal
• Release!
Stress Goals• Minimize stress
• Balance suffering with probability of release
• Take care of ourselves!
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Compassion Fatigue
• What is it?• Form of secondary PTSD; also
called secondary traumatic stress (STS)
• Secondary traumatic stress from witnessing the suffering of others
• Compassion fatigue can reduce caretakers’ empathy which can decreases the quality of care given to patients
Effects of Compassion Fatigue
• Normal displays of stress!
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Individual Symptoms• • Excessive blaming
• • Bottled up emotions
• • Isolation from others
• • Receives unusual amount of complaints from others
• • Voices excessive complaints about administrative functions
• • Substance abuse used to mask feelings
• • Compulsive behaviors such as overspending, overeating, gambling, sexual addictions
• • Poor self-care (i.e., hygiene, appearance)
• • Legal problems, indebtedness
• • Reoccurrence of nightmares and flashbacks to traumatic event
• • Chronic physical ailments such as gastrointestinal problems and recurrent colds
• • Apathy, sad, no longer finds activities pleasurable
• • Difficulty concentrating
• • Mentally and physically tired
• • Preoccupied
• • In denial about problems
Organizational Symptoms
• High absenteeism• • Constant changes in co-workers relationships• • Inability for teams to work well together• • Desire among staff members to break company rules• • Outbreaks of aggressive behaviors among staff• • Inability of staff to complete assignments and tasks• • Inability of staff to respect and meet deadlines• • Lack of flexibility among staff members• • Negativism towards management• • Strong reluctance toward change• • Inability of staff to believe improvement is possible• • Lack of a vision for the future
• Including suicide
Cuteness Interlude
How do we cope with compassion fatigue?
• ?• Ignoring the problem/bottle
it up poor standard of care
• Become detached from our patients
• Loss of motivation ( loss of productivity...b/c less productivity means experiencing less secondary trauma)
• BURNOUT
How do we avoid/treat compassion fatigue?
• ?• Awareness!• Processing the secondary
trauma• By setting limits
– So we have time to fully process (grieve) the trauma
• Taking breaks• Balance caring with the
rest of your life
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Bottom Line
• If you stretch your limits, the quality of care you give ALL your patients will be LOWER
• WRC
– Independent non-profit located in St Paul, MN
–One of the largest wildlife rehabilitation centers in the country
–Admit ~ 9000 animals/year
–Over 160 species
–2 full-time DVMs and 2 CVTs
–8 full-time staff members
–>500 volunteers
WRC Example
• ~1500 TOTAL ECTR/yr
• 500-600 <50g/yr
0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
80.0%
90.0%
100.0%
2003 2004 2005 2006 2007 2008 2009 2010
eoa
dic/e
released
How do we set limits?• Dedicate time to the rest of your life know
how much time AWAY from wildlife allows you to work optimally
• Analyze your past data (in the off season) to find your limits
Guidelines for analyzing data
• Do NOT compare yourself to other centers/rehabilitators– Variables are usually not the same
• Different types of facility (home vs center)
• Different budgets
• Different access to resources (volunteers, veterinary services, etc)
• Different amounts of available time.
• Different areas of the country
• Different seasons
• Different species
• Release rates are calculated differently!!!
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0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
80.0%
90.0%
100.0%
2003 2004 2005 2006 2007 2008 2009 2010
eoa
dic/e
released
The Release Rate Riot“ReleaseRate”
Carolina Raptor Center 75% -EXCLUDES those that die/euth w/in 24 hrs of admission-INCLUDES placed raptors (100+ on site)-admit 700/year
UK Paper 42% -EXCLUDES those that died w/in 48 hours of admit
WRC nursery ECTR 35% -INCLUDES ALL ECTRs admitted
WRC nursery ECTR 60% -EXCLUDES ONLY EOA and DOA
E wild again- rehabber avgrelease rate
67% -based on each rehabber, regardless of admit size
E wild again-overall avgrelease rate
52% -based on ALL animals admitted
E wild again numbers-ex. of calculations# patients/year
Jane Doesaver 35 80% -only does baby mammals
John StudebakerMcrehabberschmidt
67 70% -does everything
TE HS(TakesEverythingHumane Society)
5000 45% -contract with city and has to take all widlife
Total # admitted: 5102
AVG per rehabber:(80+70+45)/3= 65%
AVG per animal: (0.8*35)+(0.7*67)+(0.45*5000)=2325/5102=45.6%
28, 47, 2250
0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
80.0%
90.0%
100.0%
2003 2004 2005 2006 2007 2008 2009 2010
eoa
dic/e
released
Guidelines for analyzing data
• Do NOT compare yourself to other centers/rehabilitators
• Compare YOUR past statistics to YOUR current statistics
• Very easy and quick to do based on an electronic state/fed report....hint hint....*coughwild-onecough*
EuthanasiaThe “How-To”
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“Euthanasia”
• From the greek ‘euthanatos’ (Merriam-Webster, 2008):– Eu= good– Thantos= death
• Ideal euthanasia (AVMA, 2007):
– rapid loss of consciousness – cardiac or respiratory arrest – loss of brain function.– + minimize distress and anxiety experienced by the animal
prior to loss of consciousness
**With out these requirements ‘termination of life’, NOT euthanasia**
Indications (companion animals)
• Terminal disease
• Overpopulation
• Laboratory testing
• Herd health
• Slaughter
Indications (wildlife rehabilitation)
• Illegal
• Low chance/will not be able to survive in the wild
• Low chance/will not be able to reproduce in the wild
• Too much pain/suffering
• Lack of time/resources
Methods
• How do we know which are “best”?
Standards
• American Veterinary Medical Association) (AVMA) reviews euthanasia in the scientific literature every few years and states which methods it considers humane
• (FREE)https://www.avma.org/KB/Policies/Documents/euthanasia.pdf
AVMA• Ability to induce loss of consciousness and death
WITHOUT causing pain, distress, anxiety, or apprehension =sufferinghappens in cerebral cortex
• Time required to induce loss of consciousness• Reliability • Safety of personnel• Irreversibility • Compatibility with purpose• Emotional effect on observers or operators• Compatibility with species, age and health status• Ability to maintain equipment in proper working order• Safety for predator/scavengers should the carcass be
consumed
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Euthanasia
Methods
Euthanasia
METHODS
OF
MURDER
EUTH...
ETHICS
PLANS
FOR
PULLING
THE PLUG
SKILL OF
THE KILL
ENDING
THEIR
AGONY
POTPOURRI
This procedure
involves first
rendering the
animal unconscious
and THEN stopping
the heart....
Euthanasia
• Steps:
1. Render animal unconscious
2. Stop heart
Euthanasia Methods
• Physical– Captive Bolt
• Penetrating• Non-penetrating
– Gunshot– Manual blunt force trauma– Cervical dislocation– Percussive stunning
• Chemical– Injection – IV, IP, intra-liver, intra-kidney
• Barbituates, Tributame, T-61
– Inhalation• CO2, anesthetics, nitrogen, argon, helium
– Lethal dose of intoxicant to food or water
Adjunct:ExsanguinationPithingKCl
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METHODS
OF
MURDER
EUTH...
ETHICS
PLANS
FOR
PULLING
THE PLUG
SKILL OF
THE KILL
ENDING
THEIR
AGONY
POTPOURRI
This method of
euthanasia is
NOT “aimed
between the
eyes”
Euthanasia Methods- Physical
• Target (Gunshot, Captive Bolt)– Line from the base of the
horns to the lateral canthus of the opposite eye where 2 lines cross Angle so bullet will exit foramen magnum (brainstem)
– NOT “middle of the eyes”
– Chart of calibers online
NAHEMS 2011
Gunshot
Pros
• Rapid and Humane Death
• Target cerebral region and brainstem for immediate unconsciousness
• Good for hoofstock
• No carcass residues
• Distance or close proximity
• Silencers available
• <400# = 300ft lbs ; >400# = 1000ft lbs muzzle energy
Cons
• Skilled in technique
• NEVER in contact with skull
• Appropriate equipment– Varies by species and distance
– hollow pointed bullets; frangible iron plastic composition bullets; or powdered iron missiles
• PPE – head and eye gear
• Potential for collateral damage large
Penetrating Captive Bolt
Pros
• Rapid and Humane Death
• Target cerebral region and brainstem for immediate unconsciousness
• Good for hoofstock
• No carcass residues
• Energy required is 200 J
Cons
• Skilled in technique
• Appropriate equipment– Seals and stop washers
replaced regularly
• Must be in contact with skull
• Only more recent bolt guns kill without second step (extended length penetrating bolt)
Non-penetrating Captive Bolt
Pros
• Concussive trauma to brain
• Target cerebral region and brainstem for immediate unconsciousness
Cons
• Must be prepared to use adjunct method to ensure rapid death
• Neonatal animals only without adjunct method
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METHODS
OF
MURDER
EUTH...
ETHICS
PLANS
FOR
PULLING
THE PLUG
SKILL OF
THE KILL
ENDING
THEIR
AGONY
POTPOURRI
This method of
euthanasia
requires no
special
equipment...
Cervical Dislocation
Pros
• Immediate unconsciousness
• Quick death
• No tissue contamination
• No special equipment or supplies
Cons
• Technique requires practice
• Aesthetically unappealing
• Continued muscular movement undesirable
• Limited to small birds, mice, immature rats, rabbits
Blunt Trauma by Manual Force
Pros
• No equipment
• Single sharp blow delivered to the central skull bones in the region over the brain
• Neonates ONLY
Cons
• Aesthetically objectionable
• Skilled technique
• Requires practice
• Requires strength
• Requires resolve
Remember...
• Although Physical Methods of Euthanasia render unconsciousness immediately...
– Should drop to the ground instantaneously
– Muscles may continue to convulse
METHODS
OF
MURDER
EUTH...
ETHICS
PLANS
FOR
PULLING
THE PLUG
SKILL OF
THE KILL
ENDING
THEIR
AGONY
POTPOURRI
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These methods
of euthanasia
are not physical
in nature...
Euthanasia Methods – Chemical
• Injection – IV, IP, intrahepatic, intrarenal– Barbituates, KCl, Tributame, T-61
• Inhalation– CO2, anesthetics, nitrogen, argon
• Lethal dose of intoxicant to food or water– None identified without risk to humans or
environment
• Consider cost and disposal of contaminated carcasses
• May need chemical restraint beforehand
Euthanasia Methods - injection
IC – AVMA 2013
Intra-hepatic – AVMA 2013
Intra-renal – AVMA 2013
METHODS
OF
MURDER
EUTH...
ETHICS
PLANS
FOR
PULLING
THE PLUG
SKILL OF
THE KILL
ENDING
THEIR
AGONY
POTPOURRI
This is the most
common type of
chemical
euthanasia...
Barbituates
Pros
• Rapidity, effectiveness
• Chemical restraint generally not needed
• IV injection preferred
• IP, intra-liver, intra-kidney
• Sodium Pentobarbital – 1cc per 10 lbs mammals
– 1cc per 2 lbs birds
Cons
• Controlled substances– Beuthasol, FatalPlus
• Carcass contaminated
• MUST absolutely determine that death has taken place (vs deep anesthesia)
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T-61
Pros
• Rapid, humane death
• Terminal gasps not seen
• Works similarly well in birds
Cons
• Not available in the US
• Must be slow IV injection to avoid dysphoria
• Controlled substance
• IV only
METHODS
OF
MURDER
EUTH...
ETHICS
PLANS
FOR
PULLING
THE PLUG
SKILL OF
THE KILL
ENDING
THEIR
AGONY
POTPOURRI
These options
do NOT require a
controlled
substance
license...
Alcohols
Pros
• Readily available
• Inexpensive
Cons
• Dose-related irritation to tissue
• Large volumes required for most animals
CO2
Pros
• Not controlled
• Easily administered (chambers)
• Nonflammable
• Nonexplosive
• Use gradual increases in concentrations to avoid stress from hypoxemia
• Analgesic and anesthetic properties
Cons
• Safety equipment for gas
• Oxygen must rapidly decrease to <2%
• AVMA recommends heavy sedation prior
• Carefully regulate gas so does not freeze animal
• Time to death longer, may exhibit stress
• Drastic species differences
CO
Pros
• Loss of consciousness without pain, with minimal distress
• Rapid death with concentrations of 4-6%
Cons
• Danger to humans
• Potential for explosions
• Aversive to rodents
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N2, Ar
Pros
• Readily available compressed gasses
• Nonflammable
• Nonexplosive
• Nonaversive to poultry
Cons
• Must combine with CO2 to make heavier than room air
• Aversive to rodents
• Exposure times up to >7min
• Even 6% O2 before death will results in immediate recovery
Helium
Pros Cons
METHODS
OF
MURDER
EUTH...
ETHICS
PLANS
FOR
PULLING
THE PLUG
SKILL OF
THE KILL
ENDING
THEIR
AGONY
POTPOURRI
These
euthanasia
agents work by
inhalation...
Anesthetics
Pros
• Easily administered (chambers)
• Minimal risk to handlers vsphysical or injectable methods
• ether, halothane, methoxyflurane, isoflurane, sevoflurane, desflurane, enflurane
Cons
• Methoxyflurane and halothane not available in the US
• Enflurane can cause seizures
• Breath holding, esp. aquatic or diving species
• Aversive vapors
• Special equipment –vaporizers
• Human abuse potential
METHODS
OF
MURDER
EUTH...
ETHICS
PLANS
FOR
PULLING
THE PLUG
SKILL OF
THE KILL
ENDING
THEIR
AGONY
POTPOURRI
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These
euthanasia
agents can be
dissolved in
liquid...
Tricaine (MS222)
Pros
• Soluble in fresh water
• Soluble in salt water
• Commercially avaiable
• Not controlled
Cons
• Expensive
• Species variability
• Retinal toxicity to humans
• Cannot inject (rapid excretion)
• Possible detrimental environmental effects
Benzocain Hydrochloride
Pros
• Not controlled
• Fast acting, effective for fish and amphibians
• Low toxicity to humans
• Little environmental risk
Cons
• Does not dissolve in water
• Cost
• Must be buffered
• Impact on scavengers not determined
Clove oil
Pros
• Eugenol, isoeugenol
• Widely available
• Not controlled
• Inexpensive
• Short induction time
• Effective at wide range of water temps
Cons
• Carcass disposal
• Some derivatives are potential carcinogens
• Impact on environment not studied
METHODS
OF
MURDER
EUTH...
ETHICS
PLANS
FOR
PULLING
THE PLUG
SKILL OF
THE KILL
ENDING
THEIR
AGONY
POTPOURRI
These
euthanasia
agents are ONLY
secondary
means...
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Euthanasia Methods - adjunct
• Animal must first be rendered unconscious by other means
– KCl injection
– Exsanguination
– Pithing
KCl
Pros
• Not controlled
• IV or IC = cardiac arrest
• 75-150mg/kg, 34.1-68.2mg/lb
• Also Magnesium chloride or magnesium sulfate
• Carcasses less toxic
Cons
• No analgesia
• Adjunct method only, MUST be unconscious first
• Muscle fasiculations, spasms can be violent
Pithing
Pros
• Immediate unconsciousness
• Can be used as secondary method
Cons
• Technique
• Practice
• MUST be rendered unconscious first
• Involuntary movement post-procedure
Exsanguination
Pros
• Not controlled
• Carotid or brachial arteries
Cons
• MUST be rendered unconscious first
• Aesthetics
METHODS
OF
MURDER
EUTH...
ETHICS
PLANS
FOR
PULLING
THE PLUG
SKILL OF
THE KILL
ENDING
THEIR
AGONY
POTPOURRI
These species
large size can
make euthanasia
difficult...
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Euthanasia Methods By Species
• Bovidae (deer)
– Gunshot
– Penetrating Captive Bolt
– Injectable
• usually impractical
NAHEMS 2011
Euthanasia Methods By Species
• Ovidae, Caprinae
– Penetrating Captive Bolt
– Gunshot (no contact!)
NAHEMS 2011
Euthanasia Methods By Species
• Ovidae, Caprinae, cont
– Pithing – acceptable after anesthesia (30-50mg Xylazine IV or IM, wait 20min)
– KCl – acceptable after anesthesia
– Chloral hydrate (900mg/kg) - acceptable after anesthesia (difficult to obtain)
– Injectable – usually impractical
– CO2 – generally impractical due to required chamber size
– Electrocution – conditionally acceptable (equip)
Euthanasia Methods By Species
• Equidae
– Gunshot
– Penetrating Captive Bolt
– Injection (barbituates)
– KCl with anesthesia first:
xylazine 0.5mg/lb IV or1mg/lb IM
NAHEMS 2011
Euthanasia Methods By Species
NAHEMS 2011
• Wild Boar
– Gunshot (slug)
• 1” above brow line
• Thicker skull
– Penetrating Captive Bolt (.25 caliber)
– CO2 for <70 lbs (32kg)
• See AASV ; concentration 80-90% for minimum 5min
Euthanasia Methods By Species
• Wild Boar, cont
– Electrocution (specialized equipment required)
– Injection
• usually impractical
• Xylazine does not work
– Adjunct methods
• Pithing
• KCl
NAHEMS 2011
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METHODS
OF
MURDER
EUTH...
ETHICS
PLANS
FOR
PULLING
THE PLUG
SKILL OF
THE KILL
ENDING
THEIR
AGONY
POTPOURRI
These methods
are preferred for
canine and
feline-type
species...
Euthansia Methods By Species
• Coyotes, fox, bobcats, raccoons, skunks, ferrets/ermine, mink...
– Injection of barbituate preferred method
– Injection of non-barbituate anesthetic
• Ketamine/xylazine
– Tributame, T-61 – not currently manufactured in US
– Inhaled anesthetics, <7kgs
– CO, CO2
– Gunshot, Penetrating Captive Bolt
Euthansia Methods By Species
• Canidae/Felidae, adjunct methods
– KCl
– N2, Argon
– Electrocution (specialized equipment required)
METHODS
OF
MURDER
EUTH...
ETHICS
PLANS
FOR
PULLING
THE PLUG
SKILL OF
THE KILL
ENDING
THEIR
AGONY
POTPOURRI
These species
make up the
bulk of our
rehabilitation
mammals...
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Euthansia Methods By Species
• Rodentia/Lagomorphs (muskrats, woodchucks, squirrels, mice, bunnies...)
– Injectable (barbituates, barbituate derivatives, dissociatives agent combinations)
– Inhaled anesthetics (not N2O alone)
– CO2, CO (CO not rabbits)
– Tribromo-ethanol (not currently avail in US)
– Cervical Dislocation, <200g
– Decapitation
– Penetrating Captive Bolt
METHODS
OF
MURDER
EUTH...
ETHICS
PLANS
FOR
PULLING
THE PLUG
SKILL OF
THE KILL
ENDING
THEIR
AGONY
POTPOURRI
The preferred
method of
euthanasia for
birds is...
Euthanasia Methods By Species
• Avian
– Injection (barbituates, barbituate derivatives, dissociative agent combinations)
• IV preferred
• IP if necessary – prolonged time
• Intrahepatic in small birds
– Cervical dislocation, decapitation (<200g)
– Manually applied blunt force trauma (<200g)
– Gunshot (larger birds, use appropriate shot)
Euthanasia Methods By Species
• Avian, cont.
– CO2, CO, N2, Argon
• Latter 3 with CO2 combinations only
– Adjunct Methods
• Exsanguination
• KCl
• Thoracic compression
METHODS
OF
MURDER
EUTH...
ETHICS
PLANS
FOR
PULLING
THE PLUG
SKILL OF
THE KILL
ENDING
THEIR
AGONY
POTPOURRI
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These
difficulties
present when
under water...
Euthansia Methods By Species
• Aquatics
– Tricaine (MS222)
– Benzocaine
– CO2-saturated water
– Ethanol (concentrations of 10-30mL of 95% ethanol per Liter)
– Eugenol, isoeugenol, clove oil
– Isoflurane, sevoflurane liquids added to water
Euthansia Methods By Species
• Aquatics, cont.
– Injectable (barbituates, barbituate derivatives, dissociative agent combinations)
– Decapitation followed by pithing
– Cervical transection followed by pithing
– Manually applied blunt force trauma followed by pithing
– Captive Bolt (larger fish)
– Electrocution
– Percussive stunning
Euthanasia Methods By Species
• Marine Mammals
– Injectable anesthetics (barbituates, barbituatederivatives, dissociative agent combinations)
– Gunshot
– Implosive decerebration (not practical)
– Adjunctive
• KCl or succinylcholine
– Unacceptable
• Inhalant anesthetics (remember they’re divers)
• Exsanguination
End of Jeopardy Cuteness Interlude...
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Chelonian Euthanasia “Euthanasia” (review)
• From the greek ‘euthanatos’ (Merriam-Webster, 2008):– Eu= good– Thantos= death
• Ideal euthanasia (AVMA, 2007):
– rapid loss of consciousness – cardiac or respiratory arrest – loss of brain function.– + minimize distress and anxiety experienced by the animal
prior to loss of consciousness
**With out these requirements ‘termination of life’, NOT euthanasia**
Why am I concerned?
• http://www.youtube.com/watch?v=6_8p8sg3rSk
• http://www.youtube.com/watch?v=lmhBEeEMqYo
Why am I concerned?
• “Evidence suggests that biochemical and electrical activity persists within an anoxic turtle brain for some considerable time. This means that euthanasia with some agents could result in unexpected recovery due to the ability of chelonian brains to survive prolonged anoxia.” (McArthur et al, 2004, page 398)
Why am I concerned?
• Google search “how to kill a turtle”
– Drowning: “check on it every hour-MAKE SURE IT’S DEAD”
– Freezing: “I’ll have to make room in the deep freeze”
– “a .44 mag to the head will quickly incapacitate the critter”
Why am I concerned?
TURTLES ARE HARD TO KILL!
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Outline
• Basics of euthanasia
• Turtle physiology
• Analyze suggested methods of euthanasia
Turtle Physiology
• Turtles can tolerate anoxia for longer periods of time than other vertebrates
• Not all turtles tolerate anoxia to the same degree (not much is known)
• Painted turtles and sliders (Chrysemys picta, Pseudemys scripta/Trachemys scripta)
tolerate exceptionally long periods of time without oxygen and have been studied the most
(Lutz, 1992, Johlin & Moreland, 1933)
Turtle physiology
• The brain of the freshwater turtle Trachemysscripta [slider] is able to withstand anoxia for days at room temperature (Lutz et al., 2003; Bickler et al.,
2002)
• The anoxic turtle suppresses brain activity to such a degree that it becomes virtually comatose (Nilsson, G.E., and P.L. Lutz, 2004)
– Via releasing GABA (and conserving adenosine receptors)
EEG in turtles
• EEG of turtles does not fluctuate throughout the same range across states as in mammals (declining in frequency and amplitude during sleep)…spikes and sharp waves during sleep (Eiland et al 2001)
• Anoxic turtle brains had 3-8Hz EEG (~human sleep), about 20% of normoxic control with mixed bursts of activity
• =turtle brain down-regulates in anoxia
• Can the anoxic turtle brain feel pain????
Physiology summary
• Apnea alone may not be enough to cause death (McArther, 2004)
• Whether the brain is actually conscious and/or feeling pain in the anoxic state is still unknown
Questions so far?
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Methods of Euthanasia
• Volatile anesthetic (ie isoflurane)
• Freezing
• Captive bolt
• Decapitation
• Pithing
• Sodium Pentobarbital injection
• Combo
Volatile Anesthetic
• Turtles will hold their breath for a loooooooong time doesn’t work (Mader, 2006)
(AVMA, 2007)
Freezing
Rapid freezing:
• (ie dipping in liquid nitrogen) for turtles less than 40 grams (AVMA, 2007)
Putting turtles in the regular freezer:
• Animals may experience pain as ice crystals form within tissues and skin (Cooper et al 1984) (AVMA, 2007)
• This is not an acceptable or humane method of euthanasia, even if combined with other methods (ieanesthesia, stunning, etc) (AVMA, 2007) (McArthur, 2004) (Mader, 2006)
Captive bolt
• Diagrams and manuals exist for landmarks on where to place a captive bolt gun
• Should only be performed by a trained individual (Mader, 2006)
• Only penetrating should be used
Decapitation
• Because the central nervous system of reptiles, fish, and amphibians is tolerant to hypoxic and hypertensive conditions death is not immediate Cooper et al (1989) believes decapitated reptiles may still be able to perceive pain for up to an hour after the spinal cord has been severed
– Must be followed by pithing (AVMA, 2007)
– Needs to be preceeded by anesthesia (Mader, 2006)
Pithing
• Definition: to destroy the brain or spinal cord by passing a pick or wire into it
• Because the animal may still be conscious, pithing should only be performed by trained individuals (National Research Committee on Pain and Distress in
Laboratory Animals, 1992)
• No other source talked about pithing as a sole method
• Personally, pithing without prior anesthesia is inhumane
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Pithing sites Sodium Pentobarbital• Action: GABA-like
– Mammals: (Rhoades, R., 2002, Lumb & Jones, 2007)
• CNS is more sensitive, so causes unconsciousness first
• Then acts on the medulla oblongata to depress vital signs stops breathing BP drops heart stops
– Turtles: ???
• Heart often beats for considerable time after administration of euthanasia agent (Frye, 1991)
possibility of metabolism of agents and recovery (McArthur, 2004)
• If the heart does stop since their brains can tolerate anoxia, are they feeling pain??
Sodium Pentobarbital
• If dehydrated, cold, or moribund circulation may be poor delay/inhibit absorption (Mader,
2006) (try placing the animal on a heating pad to increase circulation)
• Site: – Intracardiac (only if anesthetized first) (Mader, 2006)
– Intracoelomically (slow acting)
– Dorsal tail vein
– Subcarapacial sinus
Combo Euthanasia
Ideal
• Anesthetic plus pithing/intracranial injection of formalin
• Anesthetic plus sodium pentobarbital plus pithing
• Sodium pentobarbital plus cardiotoxic agent plus pithing
Small?
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Cuteness Interlude... Questions?
Pre-fabricated topics Nonindigenous Species
• Allocation of resources
• Euthanasia on admission
• Specialized individual rehabilitators
Obtaining Euthasol
• Vet relationship
• ALL VETS CAN EUTHANIZE ANYTHING
– Can choose not to
Dealing with Volunteers
• Who are very attached to specific animals
• Being able to explain reasons for euthanasia
• Being confident that euthanasia IS an appropriate treatment option
1/9/2015
25
Dealing with the Public
• Nuisance species
– “please euthanize this healthy raccoon”
• Animal rights groups with problems that you euthanize at all
Dealing with the Emotion
• Compassion Fatigue
• Coping Mechanisms
Struggling with when…
• How long do you “give them a chance”?
• Who do you decide to “give a chance”?
• Why?
• Why not?
Specific Injuries
• Go to Triage lecture on Saturday...
• No orthopedic vet nearby, to rehab or not?
Keeping the Goal in Mind…
• Remember why you’re doing what you’re doing
• Learn from euthanasias
• Learn from successes
• Learn from mistakes
• Use that knowledge to help the next ones…