Jaynstein - Bites, Stings, Creepy Things Flashcards
which is worse: cat bites or dog bites
cat
which is more common: dog bites or cat bites
dog
80-90%
which dog breeds have the most potential for injury
police dogs
t/f: tx is different dog bites if the dog is known and UTD on vaccinations
F!
tx is the same
important hx for bites (5)
animal known?
breed
time of bite
pt comorbidities
tetanus hx
tetanus vaccine schedule
q 10 years w.o incident
q 5 years w. incident
goal of bite wound management
prevention of infxn
__% of dog bites get infected
__% of cat bites get infected
dogs: 5%
cats: 50%
* but tx is basically the same*
most critical aspect of bite care
irrigation
also evaluate for FB
bites at high risk for infxn (7)
immunocompromised
etoh
hand or foot/extremity
crush injury
multiple puncture wounds
cat bite
delayed presentation
delayed presentation for extremity bite is > __ hr
12
delayed presentation for face bite is > __ hr
24
mc bacterial infxn from both dog and cat bites
pasteurella
most bites are polymicrobial, so also worry about __ (2)
staph
strep
bacteria of concern in dog bites that is rare but has high mortality
capnocytophaga
3 major complications w. cat bites dt sharp teeth that penetrate joints
septic arthritis
osteomyelitis
tenosynovitis
bacteria associated w. joint infxns in cats
pasteurella multocida
management of cat puncture wound
anesthetize
open up
irrigate
always, no matter what
besides irrigation, how else would you manage this cat puncture bite
document:
document # of punctures
drainage
surrounding erythema
complete NV exam w. CMS
date and time stamp line
Kanavel’s criteria for tenosynovitis (4)
tenderness along course of flexor tendon
fusiform or symmetrical swelling of finger
pain w. passive ROM
flexed posture of the finger

which is more concerning, flexor or extensor injuries
flexor
cat bites are more concerning for infxn, but dog bites are more concerning for
structural damage →
soft tissue injury, crush injury, avulsion/tears
tx considerations for bites
document nerve, vascular, bone assessment
consider imaging
for dog bites, always check and document that you evaluated __
distal CNS
infxn timeline for cat vs dog bites
cats: 12 hr
dogs: 24 hr
t/f you need labs/cultures before starting abx for bites
F!
all cat/dog bite pt’s should be given what abx
Augmentin
imaging to consider for boney injury, free air, or FB
xray
imaging for vascular injury
CT w. contrast
CTA extremity
tx for cat bites should NEVER include
closing the wound
star them, clean out
dog bites on the __ may be closed
dog bites on the __ should not be closed
face
hand/foot
if you do suture a dog bite laceration use __ sutures
and never __
simple interrupted
double closure
what are PEP abx
post exposure prophylaxis
PEP is recommended for what bites (6)
hand
feet
face
immuno comp
puncture
sutured wounds
first choice abx w. dosing for bites
Augmentin 875 mg bid x 5 days
first choice abx w. dosing for bite wounds if PCN allergy
doxycycline 100 mg bid x 7 days
abx for infected bite
Augmentin 875 mg PO x 5 days
Unasyn 3 gm IV
minimum f.u for bites
12-24 hr
t/f: animal bites are considered tetanus prone
T!
always do vascular study for __ dog bites
police
t/f: all dog/cat bites need to be reported in CO
T!
t/f: human bites are more serious than dog/cat bites
T!
2 viruses that can be transmitted via human bites
hep B
HSV
can HIV be transmitted via human bite
no!
major bacteria to consider in human bite
eikenella corrodens
besides eikenella, also consider __ (2) in human bites
staph
strep
bacteria to consider/cover for bite on the foot
pseudomonas
what is this called
fight bite
2nd MTP
abx for human bites
augmentin 875 mg PO bid x 7 days
repetition, repetition, repetition :)
do not close human bites unless they are located on the __
face
tx for human bites
open
irrigate
+/- hep B vaccination
what is this called
herpetic whitlow
HSV infxn from infected saliva
what should you ask about if you see unexplained LAD on a kiddo
cat bite → cat scratch dz
bacteria responsible for cat scratch dz
bartonella henselae
3 sx of cat scratch dz (3)
low-grade fever
fatigue
regional tender LAD
cat scratch dz occurs __ weeks after injury
1-3
tx for cat scratch dz (3)
don’t drain or I&D
most self resolve
abx if ill
abx for cat scratch fever
azithro
or
doxy
who gets pre-exposure for rabies
vets
major vector for rabies in the US
bats
mc vector for rabies worldwide
dogs
in the US, are cats or dogs more commonly rabid
cats
tx for animal that is not ill at the time of bite
quarantine for 10 days
no PEP
tx for animal that is sick at the time of bite
held by city
PEP given immediately
4 animal bites that need PEP immediately
raccoons
foxes
skunks
bats
5 animal bites that are +/- PEP on individual basis
livestock
horses
rodents
rabbits
hares
rabies PEP schedule
days 0, 3, 7, 14
when should you give PEP for bat bites
when not 100% sure that a bat didn’t scratch or bite pt
zoonotic systemic infxn from mice/rats
hanta virus
hanta virus has a __ week intubation
and manifests as __ infxn
2
pulmonary
initial presentation of brown recluse bite
painless
brown recluse bites are __toxic
necro (skin)
brown recluse rxn involving localized skin erythema and edema that resolves spontaneously over 1 week
minor loxoscelism
brown recluse rxn involving severe skin erythema w. cutaneous blisters and/or irregular ecchymosis; red, white, blue sign
cutaneous loxoscelism
what is this showing
brown recluse bite
red, white, and blue sign
red, white, blue sign:
red:
white:
blue:
red: vasodilation
white: ischemia
blue: necrosis
brown recluse bite tx (3)
no anti-venom
often extensive wound care w. debridement
heals in 6-8 weeks
what is latrodectus hesperus
black widow
black widow bites are __toxic
neuro
black widow bite sx
intense, sudden, local or regional pain
diaphoresis
htn
agitation
fever
abdominal spasms
black widow bite can mimic __ sx
acute abdomen
tx for black widow bite (2)
pain control for abd spasms → benzos
obs x 12-24 hr
+/- anti venom
t/f: there is an anti venom for brown recluse bites
F
t/f: there is an anti venom for black widow bites
T
what are these showing
black widow bites
geographic location of black widow bites
all over US
classifications of snake bites in terms of toxicity
hemotoxic
neurotoxic
necrotoxic
cardiotoxic
nephrotoxic
2 families of venomous snakes in US
viperidaes
elapidae
venomous viperidaes snakes include (3)
pit vipers
rattlesnakes
copperheads
viperidaes snakes are __toxic (2)
hemo
necro
venomous elapidae snakes include (3)
cobras
mambas
coral snakes
elapidae snakes are __toxic
neuro
largest snake threat in CO
rattlesnakes
sx of rattlesnake bite
edema
pain
ecchymosis at site
RBC destruction, thrombocytopenia, coagulopathy → unstable vitals
tx for rattlesnake bite (8)
remove rings/restrictive material
immobilize
rest extremity at level of heart
call poison control
monitor VS min 8 hr
labs
measure and mark
update tetanus
tx to AVOID in rattlesnake bites (6)
compression
incision
mouth suction
excision
tourniquet
ice/heat
labs for rattlesnake bite
CBC
BMP
PT/INR
CPK
classification of rattlesnake bite
minor vs major envenomation
tx consideration for all pt’s who receive rattle snake anti venom
ICU admit
name of rattlesnake anti venom
crotilidae polyvalent immune Fab (CroFab)
dosing for CroFab
initial: 4-6 vials
life threatening: 8-12 vials
each vial is several thousand $$
how often to mark/document erythema/edema for rattlesnake bite
q 1-2 hr
how to remember venomous vs non venomous coral snake
red on yellow kill a fellow
red on black venom it lacks
coral snakes are __toxic
neuro
sx of coral snake bite
n/v
HA
CN sx → ptosis, dysarthria, dysphagia, muscle weakness, resp failure
sx of coral snake bite occur w.in
12-24 hr → keep pt
tx for coral snake bite
admit
anti venom early
update tetanus
+/- constriction bandage
tx consideration for ticks that stay on skin > 6 hr
scalpel
sx of tick borne illness mimic
flu → FUO (fever of unknown origin)
tick season
late spring - early fall
important hx in FUO (3)
travel
pet
livestock exposure
what is this showing
bulls-eye → lyme dz
what tick carries lyme dz
borrelia burgdorferi
rash of lyme dz
erythema migrans
describe erythema migrans (5)
1-3 days after bite
target lesion
erythematous
increases in size
fades 3-4 weeks
sx of lyme dz (7)
fever
malaise
HA
monoarthritis (knee/hip) → polyarthritis
CN dysfxn
meningitis
hearing loss
CN affected by lyme dz
CN VII → BP
dx for lyme dz (6)
ELISA
western blot
serology
synovial fluid PCR
urine antigen
IgG/IgM
tx for lyme dz
adults vs kids
doxycycline 100 mg bid x 14 days
kids: amoxicillin 50 mg/kg/day TID x 21 days
tick borne illness carried by wood tick/dog tick
rocky mtn spotted fever
mc rickettsial dz in the world
RMSF
describe the rash in RMSF (3)
1 week after bite
erythematous macules → then petechiae
starts on distal extremities
besides rash, 6 other sx of RMSF
fever
HA
myalgias
malaise
abd pain
n/v
dx for RMSF
clinical
hematology finding of RMSF
thrombocytopenia
only used for confirmatory testing
what is this showing
RMSF rash
tx for RMSF
doxy 100 mg x 7 days min
continue x 3 days post fever
abx for RMSF if doxy contraindication
chloramphenicol 12.5 mg/kg PO 4 times daily x 7 days
5 other tick borne diseases (besides lyme and RMSF)
ehrlichiosis
babesiosis
colorado tick fever
tularemia
tick borne relapsing fever
tick borne illness that causes hemolytic anemia
babesiosis
tick borne illness found in rabbits __
causes __ sx
tularemia
pulmonary
3 tick borne illnesses in CO
colorado tick fever
tularemia
tick born relapsing fever
most stings come from __,
which include __ (3)
vespids
wasps, hornets, yellow jackets
what does PEST stand for
rxn to stings:
pruritis
erythema
soft tissue swelling
tx for a sting that is inflamed but not infected
antihistamines
+/- steroids
tx for sting that is showing signs of cellulitis
abx
what is hymenoptera
bee
tx for bee sting
remove stinger
pain control
tetanus (really??)
be aware of bee stings in the (2)
mouth
eye
toxic systemic rxns are seen with > __ bee stings
50
tx for anaphylaxis
intubate early
epi dosing for kids vs adults
kids: 0.01 mg/kg IM 1:1000 (epipen JR 0.15 mg)
adults: 0.3-0.5 mg IM 1:1000 (epipen 0.3 mg)
temp hemostasis occurs via what 4 mechanisms
conduction
convection
radiation
evaporation
what is miliaria rubra
heat rash
what is this showing
miliaria rubra
tx for miliaria rubra is mc in
kids
tx for miliaria rubra
none necessary
heat disorders mild → extreme (5)
edema
syncope
cramps
exhaustion
stroke
what is this showing
what is the tx
heat edema
elevation, rest, cooling, oral fluids
simple, transient LOC or collapse after exertion in heat
heat syncope
sx of heat syncope (3)
cool, clammy skin
weak pulse
hypotn
core body temp in heat syncope
normal
tx for heat syncope
oral/IV hydration
spasm of voluntary abd muscles and extremities 2/2 to electrolyte disturbance
heat cramps
2 mc lytes involved w. heat cramps
- sodium
- potassium
core temp in heat cramps
nl or mildly elevated
tx for heat cramps
oral hydration
Na replacement (sports drink)
systemic rxn to prolonged heat exposure dt dehydration or sweating
heat exhaustion
first part of spectrum of heat stroke
heat exhaustion
parameters for heat exhaustion
elevated but < 40C
sx of heat exhaustion (5)
ha
n/v
malaise
muscle cramps
dizziness
sx that is NOT component of heat exhaustion
CNS
tx for heat exhaustion (4)
cooling
rehydration (oral and IV)
lyte replacement
admit
severe systemic dysfxn of heat regulation - multiorgan failure
heat stroke
almost all heat stroke pt’s have __ dysfxn
liver
sx of heat stroke (4)
CNS:
AMS
confusion
coma
visual disturbance
core temp in heat stroke
>40C (104F)
complications of heat stroke (3)
rhabdo
DIC
ARF
minimum labs for heat stroke (4)
CMP
CPK
UA
coag panel
tx for heat stroke
cooling → water immersion until temp <102F
admit
are fever reducers helpful in heat stroke
no
indications for poor prognosis in heat stroke (4)
persistent hyperprexia (temp >107)
coma
elevated LFTs
hyperK
3 locations where ice packs are most effective
neck
groin
axilla
3 advanced cooling techniques
water immersion
ECMO
peritoneal lavage