APA 1 Flashcards
Tight table strap nerve inj
Lateral femoral cutaneous
Stirrups nerve inj
Common peroneal
Arm board/shoulder brace nerve inj
Brachial plexus
BF cuff/tourniquets/firm surfaces nerve inj
Radial nerve
Map dec by____ mmHg for Q ___ inch increase in height
2, 1
Mask on face/ revisor bag/ no rebreathing/ Insp unidirectional valve only = ____ system
Semi-open
Components of an anesthetic (4)
Immobility, amnesia, analgesia, unconsciousness (if general)
O2 flush valve delivers how much?
35-75 L/min
V5 placement
5th intercostal space, anterior axillary line
PVR equation
[(MPAP-PAOP)/CO] X 80
CO eq
HR X SV
CI eq
CO / BSA
SVR eq
[(MAP - CVP) / CO] X 80
SVRI eq
[(MAP - CVP)/ CI] X 80
PVRI
[(MPAP-PAOP)/CI] X 80
Normal CVP
2-6
Normal CO
4-8 L/min
Normal CI
3 L/min
Causes of dampened A-line tracing
Bubble/ Bent extremity/ Thrombus/ Kink/ Long tubing
Top 4 PNI in order
- Ulnar 2. Brachial plexus 3. Lumbosacral 4. Spinal cord
Top 3 litigation reasons in order
- Death 2. PNI 3. Brain damage
Most common anesthetic injury
Eye or dental
High risk awareness
Major trauma (43%) OB (1.5%) Cardiac (.4%) Females, young adult, obese, hx awareness,
Best indicator of awareness
ET anesthetic conc. (1/3 MAC amnesia)
Most common cause of post-op vision loss
Ischemic optic neuropathy ?
Type 1 allergic rxn
IMMEDIATE (atrophy (?), urticaria-angioedema, ANAPHYLAXIS)
Type 2 allergic rxn
CYTOTOXIC (transf. Rxn, HIT, autoimmune, hemolytic anemia)
Type 3 allergic rxn
IMMUNE COMPLEX (RA and serum sickness)
Type 4 allergic rxn
DELAYED, CELL-MEDIATED (Contact dermatitis- latex, poison ivy)
Anaphylaxis vs anaphylactoid
Anaphylactoid does NOT depend on IgE antibody
Dantroline dosing and frequency
2.5 mg/kg STAT Repeat q5 min to max of 10 mg/kg Continue 1 mg/kg q6 hrs for 24 hrs
3 things for fire
Ignition source Oxidizing agent Fuel
Total body water: Man ___ Woman ____ Infant ____
55% 45% 80%
Intracellular vol. % body weight Extra cellular vol. % body weight
ICV= 40% ECV= 20%
Plasma vol ___% of ECV Interstitial vol ___% of ECV
25% 75%
Hypovolemia vs Dehydration
Hypovolemia= vol depletion, absolute fluid loss Dehydration= concentration disorder, low H2O compared to Na
Most important osmotically active substance influencing H2O content in brain
Na
1 u PRBC raises Hgb ____
1 g/dL
1 UNIT plts raises plt count ____
5,000-10,000 *often use 6 u/bag *still need type and cross
Estimated blood volume EBV male ___ to ___ mL/kg EBV female ___ to ___ mL/kg EBV obese ___ to ___ mL/kg
M: 70-75 ml/kg F: 65-70 ml/ kg O: 55 ml/kg
ABL (allowable blood loss) formula
(EBV X (starting hct- target hct)) / hct starting
Maintenance fluids: Based on weight 1st 10 kg ___ 2nd 10 kg ____ Every kg after 20 ___
40 ml/hr 20 ml/hr 1 ml/kg/ hr ————— Add together to get deficit
Deficit fluid formula
Maintenance X hrs NPO (Replace this much in 1st 3 hrs) (1/2 in 1st hr, 1/4 in 2nd hr, 1/4 in 3rd hr)
3rd space loss based on _____
Surgery
Minimal trauma surgery loss
3-4 ml/kg/hr (Knee, shoulder, hernia)
Moderate trauma surgery loss
5-6 ml/kg/hr
Severe trauma surgical loss
7-8 ml/kg/hr (Open belly, cardiac, thoracic)
A alpha fibers
Motor/proprioception (largest)
A beta fibers
Fine touch/ proprioception (2nd largest)
A gamma fibers
Motor/ Muscle spindle fibers (3rd largest)
A delta fibers
Sharp pain, cold, touch (Smallest of As)
B fibers
Sympathetic stimulation (Preganglionic autonomic)
C fibers
Temp and dull pain and touch (UNMYLEINATED!)
{substance P}
Blockade sequence
1st B
2nd A & C
Blockade sequence pneumonic
ATP, TP, MVP Autonomic, touch, pain Temp, pressure Motor, vibration, proprioception
Adding epi to LA
Vasoconstriction Prolonged duration Increased intensity Decreased systemic tox Decreased surgical bleeding Assists with test dose
Adding sodium bicarbonate to LA
Increases pH & :. Non-ionization inc. Speeds onset Decreases injection burn
Adding opiate to LA
Increases strength and duration Mostly for neuraxial blocks
GCS Categories
Eye (max 4 points) Verbal (max 5 points) Motor (max 6 points) 15 perfect 3 worst
Systolic murmur
Mitral regurgitation Or Aortic stenosis
Diastolic murmur
Atrial regurgitation Or Mitral stenosis
S3 sound
Early diastole Sudden deceleration of blood flow from LA to LV [overly compliant LV] (Indicates systolic CHF in elderly/ normal in young people or athletes or pregnant)
S4 sound
Just before S1 Blood forced from LA into NONCOMPLIANT LV (Diastolic HF or active ischemia, can be sign of LV hypertrophy)
Gauge range and length for spinal needles
22-29 g 3.5-5 inches *mostly use 25-27 g and 3.5 inch
Pencil point needle advantages
Non-cutting tip Less PDPH Drags less contaminants into subdues tissue Pierce dura with clearly perceptible “POP”
Pencil point - Whitacre
Pencil point - gertie marx
Quincke (in spinals) or quincke-babcock has a “cutting bevel tip” - hold the bevel direction parallel to the longitudinal dural tissue fibers to minimize the risk of PDPH
bevel can cut- so direct which way it goes
Touhy needle (turns for catheter)
[for Epidurals]
(like 17 g)
Differential Blockade order
top: autonomic
2-3 lower: sensory
2-3 lower: motor
Spinal complications
Failure of block- may try again or another method of anesthesia/
Post – dural puncture headache POSITIONAL when sitting up/
High spinal/
Nausea – COMMON r/t hypotension and decreased perfusion, block symp outflow to GI but not parasymp outflow to GI/
Urinary retention /
Hypoventilation/
Backache/
Hematoma/
Orthostatic hypotension
Hematoma Recognition/Treatment
New onset weakness to lower limbs and sensory deficit, OR spinal never wears off (should wear off 1-4 hrs), OR get feeling again then starts to get numb
New onset back pain
New onset bowel or bladder dysfunction
Must diagnose and surgically decompress hematoma within 8 hours for best outcome
Can cause paraplegia
Consult neuro and send for MRI
how long to NSAIDS stop before neuraxial
no contraindication
how long to stop asprin before neuraxial
no contraindication
how long to stop Clopidogrel (Plavis) before neuraxial
7 days pre-op
how long to stop heparin before neuraxial
place a needle or catheter 1 hour prior to administration of heparin. Catheters should be pulled when heparin activity is at a minimal level (10-12 hrs). (An hour before the next dose) Monitor aPTT
how long to stop Coumadin before neuraxial
monitor anticoagulation with Pt and INR
how long to stop ticlopidine before neuraxial
14 days pre-op
how long to stop Abciximab before neuraxial
7 days pre-op
how long to stop Eptifibatide before neuraxial
4-8 hrs pre-op
how long to stop tirofiban before neuraxial
14 days pre-op
how to treat post-dural puncture headache
analgesics, bed rest, oral hydration, or oral caffeine 1st
then blood patch
short acting L.A.s
lido and procaine
longer lasting L.A.s
bupivacaine and tetracaine
structures exterior to interior to pass needle through for subarachnoid block
- skin
- subcutaneous
- supraspinous ligament
- interspinous ligament
- ligamentum flavum
- dura mater
- arachnoid mater
- subarachnoid space
if doing an epidural stop needle after what structure?
ligamentum flavum
PCWP should be take when?
end of expiration
CVP a wave
RA contraction
CVP c wave
Ventricular contraction
CVP x wave
atrial relaxatiom
CVP v wave
RA filling
CVP y wave
tricuspid valve opening
what happens if insp. valve of AGM sticks open?
exp. volume goes out isp. limb
therefore increased EtCO2
what happens if exp. valve of AGM sticks open?
breath will take path of least resistance and skip going to patient- right out exp. limb
L.A. caridotoxicity order (most to least)
1. Bupivicaine/Ropivacaine, Cocaine/Tetracaine