Random Topics Flashcards
Match the Radial, Ulnar and median nerve damage to the observed result?
Radial: wrist drop
Ulnar: Claw Hand
Median: Thumb Opposition
Conditions with cervical spine anomalies
“Kid Try Gold”
Klippel Fleil
Trisomy 21
Goldenhar
Conditions with a small underdeveloped chin
"Please Get That Chin" Pierre-Robbins Goldenhar Treacher Collins Cri Du Chat
Conditions with Macroglossia
“Big Tongue”
Beckwith
Trisomy 21
Things that increase MAC
Chronic EtOH Increased CNS Neurotransmitters Hypernatremia Infants 1-6 months Hyperthermia Red Hair
Things that decrease MAC
Acute EtOH IV Anesthetics N2O Opioids Hyponatremia Older Age Prematurity Hypothermia
What are some causes of Low EtCO2
Hyperventilation (Pain, light anesthesia, metabolic acidosis)
Decrease CO2 production (Hypothermia)
Increased Alveolar dead space (Hypotension, PE)
How many Liters are in E-Cylinders based on gas
Air: 625L / 2000 PSI
O2: 660L / 2000 PSI
N2O 1590L / 745 PSI
Formula for dissolved O2
PaO2 x 0.003
Formula fo CaO2
CaO2 = (FiO2 x Hgb x 1.34) + (PaO2 x 0.003)
Formula for DO2
DO2 = CO x 10 x [(Hgb x Sa02 x 1.34) + (0.003 x Pa02)]
What is a priority in a patient with pyloric stenosis?
Correct volume status and electrolyte abnormalities
(medical NOT surgical emergency)
- Volume: 20 mL/kg
-
What are some post operative complications with pyloric stenosis?
Postoperative apnea
What is the function of the Lateral Spinothalamic Tract?
Pain and Temp
What is the function of the Ventral Spinothalamic Tract?
Crude Touch and pressure
What is responsible for fine touch and proprioception?
The Dorsal Column: Cuneatus and Gracilis
A common complication of ET intubation in pediatrics
Post- Intubation “Croup”
Facts about Croup Laryngeotracheal Bronchitis
- Barking Cough
- younger kids
- Viral
- Low fever
- Racemic Epi and Humidified O2
- Steeple sign
What are some complications of Bone cement?
- The First sign under GA is DECREASE EtCO2
- Emboli
- Bradycardia
- Hypotension ( dec SVR)
- pHTN (Inc PVR)
- Hypoxia
- Cardiac Arrest
Which procedure has the greatest risk of Bone Cement Implantation Syndrome (BCIS)?
Hip Arthroplasty
What is the First Line treatment for BCIS? Bone cement
100% FiO2
IV Hydration
Phenylephrine
(Treated as RT heart failure)
What hormones are secreted from Carcinoid tumors?
Histamine
Serotonin
Kinins & Kallikrein
Signs of Carcinoid crisis
Bronchoconstriction Flushing (head and neck) Supraventricular Tachydysrhythmias HTN/Hypotension Vasodilation/Vasoconstriciton Increased GI motility (ABD Pain, Diarrhea)
Drugs to avoid in patients with a carcinoid tumor?
- Sympathomimetics: Ketamine and ephedrine
- Histamine: Succ, Atracurium, morphine, meperidine, Thiopental
- Exogenous catecholamines
Drugs used in the treatment of carcinoid tumors?
- Octreotide/Ianreotide (somatostatin)
- Ondansetron (5HT3 Antagonist)
- Diphenhydramine + Rinatedine or Cimetidine (Antihistamines H1 & H2)
- Steroids
- Phenylephrine or vasopression for hypotension
What are the location of the nerves relative to the axillary artery?
Median Nerve: Anterior and medial
Ulnar Nerve: Posterior and Medial
Radial Nerve: Posterior and lateral
MSC Nerve: Anterior and Lateral
What coagulation issue occur with pre-eclampsia?
1) Thrombocytopenia
- consumptive
2) Increase thomboxane (by 7x)
3) decrease Prostacyclin
What is the most important site of pain modulation?
Rexed Lamina II & III (Substantia gelatinosa) of the Dorsal Horn
- the descending pathway begins in the periaqueductal grey and rostroventral Medulla
What are the pain inhibiting neurotransmitters?
Spinal: GABA and Glycine
Descending Pathway: NE, 5-HT3, and Endorphins
Pain is augmented by?
Wind-Up
Central Sensitization
What nerve is in charge of mastication?
Trigeminal V3 (Mandibular)
What are branches of the trigeminal nerve?
CN V
- V1: Opthalmic
- V2: Maxillary
- V3: Mandibular
What TV do you use in the neonate?
6 mL/kg
How do you confirm ETT placement in the neonate?
EtCO2
Chest Rise
Condensation in the tube
Increasing SaO2
Anesthetic management of MS?
- Aspiration Risk (D/t cranial nerve involvement)
- Avoid Hyperthermia and stress
- Succ can cause life-threatening hyperkalemia
What are the management techniques for Hypertrophic Cardiomyopathy?
Increase Preload (Volume/Phenylephrine)
Increase Afterload (Aortic Pressure): Phenylephrine
Decrease HR
Decrease Contractility
What medications Decrease PVR?
NO NTG PDEi (Sildenafil) Prostaglandins CCB ACEi Fentanyl (Treats pain)
What drugs INCREASE PVR?
N2O
Ketamine
Desflurane
What parameters increase PVR?
Hypoxia Hypercarbia Acidosis Hypothemia SNS stimulation Pain
What causes problems after aortic cross clamp removal?
Hypovolemia - Decrease venous return (preload) Dec Contractility Dec SVR Dec Preload/Afterload
What is the normal MA in a TEG and what does it measure?
Measures Clot strength
MA: 50-60
Evaluates platelets( PLT + DDAVP)
What is the normal R time in a TEG and what does is measure?
Time to begin forming clot
R: 6-8 min
Coagulation factors (give FFP)
What is the normal K time in a TEG and what does is measure?
Time till clot has achieved fixed strength
K: 3-7 min
Fibrinogen (Cryo)
What is the normal Alpha Angle in a TEG and what does is measure?
Speed of fibrin accumulation
Alpha Angle: 50-60 degrees
Fibrinogen (Cryo)
What is the normal A60 in a TEG and what does is measure?
A60: MA-5 Excess fibrinolysis (TXA)
What is the Max dose for neostigmine?
MAX: 5mg or 5000 mcg
range: 0.02-0.07 mg/kg
What are similar respiratory mechanisms changes in pediatric and elderly?
- Minute Ventilation (Increase)
- Closing Capacity (Increase)
- Residual volume (Increase)
- Vital Capacity (Decrease)
What drugs are dosed based in IBW?
- Propofol (Induction)
- Vecuronium/Rocuronium
- Sufentanil
- Remifentanil
What effect does the prone position have on hemodynamics?
- Improved V/Q
- Decreased venous pressure
- Improved venous return
What are some problems seen with hydralazine?
Reflex tachycardia
Lupus like symptoms
What are some problems with Sodium Nitroprusside?
Cyanide Toxicity
Methemoglobinemia
How does CO change during pregnancy?
Increases by 40 %
How does CO change during labor?
1st stage: 20%
2nd stage: 50%
3rd stage: 80%
When does CO return to prelabor values?
24-48 hours
When does CO return to pre-pregnancy values?
2 weeks
How does BP change during pregnancy?
Decreased diastolic BP
how do lung volumes change during pregnancy?
Decrease
- FRC
- RV
- ERV
- TLC
What clotting factors are decreased in pregnancy?
- Protein C & S
- XI & XIII
What effect does increased thromboxane have in pregnancy?
Increased
- platelet aggregation
- Vasoconstriction
- Uterine Activity
Decreased
- Uteroplacental Blood Flow
At what level does the Dural Sac end in Peds?
S3
S2 in 1 y/o
At what level does the spinal cord end in the neonate?
L3
What are the terminal branches of the brachial plexus?
MSC Radial Median Ulnar Axillary
List the cords?
Lateral
Posterior
Medial
List the trunks?
Superior
Middle
Inferior
The posterior Cord gives rise to the ________
Radial
Axillary
The lateral Cord gives rise to the _________
MSC
Median
The medial cord gives rise to the __________
Ulnar
What is the formula for Coronary perfusion pressure?
CPP = AoDBP - LVEDP (aka PAOP, PAWP, PCWP)
Relative indications for OLV?
Surgical Exposure
Pulmonary Edema s/p CABG
Severe Hypoxemia
Procedure risk factors of Ischemic Optic Neuropathy
Prone Wilson Frame Long duration of anesthesia large blood loss low colloid to crystalloid ratio hypotension
Landmarks for the Popliteal nerve block
Popliteal triangle
- semimembranous muscle (also the Semitendinosus) medially
- Biceps Femoris Laterally
- popliteal crease as the base
What are the disadvatages to the Beir Block (IV regional anesthesia)
LAST
Tourniquette Pain
No Post Operative Analgesia
Anatomical landmarks to the median nerve block at the wrist
Flexor Capri Radialis tendon (Thumb/lateral)
Palmaris Longus Tendon (Pinky/Medial)
What is the formula for Cerebral PP?
CPP = MAP - ICP or CVP (whichever is higher)
What agents can be use in hyperthyroid patients to treat signs of hyperthyroidism?
The 4 B’s
- BB: Esmolol, Propranolol
- Block Synthesis: PTU, Methimazole, Carbimazole, potassium iodide
- Block Release: radioactive iodine, potassium Iodide
- Block T4 to T3 conversion: Propranolol, PTU, Glucocorticoids
What drugs exacerbate Neuroleptic Malignant Syndrome (NMS)?
Dopamine Antagonists:
- Metoclopramide
- Haloperidol
- Risperidol
- Chlorpromazine
What is the treatment for NMS?
Dantrolene Bromocriptine Supportive Care ECT - Succ is safe
LMA cuff volume by size?
LMA 5: 40 LMA 4: 30 LMA 3: 20 LMA 2.5: 14 LMA 2: 10 LMA 1.5: 7 LMA 1.: 4
What causes systolic dysfunction?
Eccentric hypertrophy (Regurgitation) : Volume issue
What causes diastolic dysfunction?
Concentric hypertrophy (LV thickening): Pressure (AS)
What does SIADH cause?
Hypervolemic Hypotonic Hyponatremia