Assessments Unit 1 Flashcards
What percentage of a diagnosis can be correctly determined from a patient history alone?
56%
What constitutes a medical history exam?
Underlying condition requiring surgery, medical history/problems, previous surgeries/anesthetic history, anesthetic complications, ROS, current meds, allergies, tobacco/ETOH/illicit drug use, functional capacity
What 4 things are BMI used to calculate (per powerpoint slide)?
1 - estimate/calculate drug dosages
2 - determine fluid volume requirement
3 - calculate acceptable blood loss
4 - adequacy of urine output
What is important to establish from a focused physical exam?
The patients baseline (neuro, CV, respiratory etc) in all systems
What acronym is used for an emergent physical exam? In an emergency if you can only pick 2, which do you pick?
A - allergies
M - medication
P - PMH
L - last meal
E - events leading up to surgery
Emergency pick 2 = allergies and PMH
What accounts for almost half of perioperative mortalities?
Problems with the CV system
What is a G6PD deficiency?
The body lacks that enzyme, which the lack of causes hemolytic anemia. RBCs break down faster than they are made in response to stress
What court case established informed consent? Outcome of the surgery?
Salgo v Leland Stanford Jr. University Board of Trustees. An aortogram left the pt paralyzed
What surgeries carry a high mortality risk (>5%)? Intermediate (1 - 5 %) or low (<1%)?
High = aortic and major vascular surgery
Intermediate = Intra-abdominal or intrathoracic surgery, carotid endarterectomy, head/neck surgery
Low = ambulatory, breast, endoscopic, cataract, skin, urologic, orthopedic
What is the goal of METs?
greater than 4
Define emergency, urgent and time-sensitive surgeries
Emergent = life or limb would be threatened if surgery did not proceed within 6 hours
Urgent = life or limb would be threatened if surgery did not proceed within 6 - 24 hours
Time-sensitive = delays exceeding 1 - 6 weeks would adversely affect patient outcomes
Describe ASA physical status grading I - VI
I = healthy, non-smoking, minimal ETOH
II = Mild disease only w/o substantive functional limitations. Current smoker, social ETOH, pregnant, overweight, controlled DM/HTN
III = Severe systemic disease. Substantive functional limitation. One or more moderate/severe disease. Poor DM, COPD, HTN, obese, hepatitis, ESRD w/regular HD, moderately reduced EF
IV = Severe systemic disease that is a constant threat to life. MI, CVA, TIA, CAD/stents, severe valve dysfunction, severely reduced EF, DIC, ARDS, ESRD w/o regular HD
V = moribund pt who is not expected to survives w/o the operation. Ruptured aneurysm, massive trauma, ICH
VI = brain dead, organs being donated
What are Saklad’s 5 degrees of ASA PS grading of operative risk?
1 - Pt’s physical state
2 - the surgical procedure
3 - the ability/skill of the surgeon
4 - attention to post-op care
5 - past experience of the anesthetist in similar circumstances
Define: GA, IV/monitored sedation, Regional and Local anesthesia
GA = total LOC, ET or LMA, major surgeries
IV/Monitored = LOC ranges, drowsy to deep sleep. NC or face mask, requires vigilant observation
Regional = numbs a large part of the body using a local anesthetic (epidural or spinal), good for child birth or a hip replacement
Local = one-time injection that numbs a small area. Such as a biopsy
What agents most commonly have side effects in anesthesia?
Neuromuscular blockers, latex, antibiotics, chlorhexidine and opioids
What medications do you continue prior to surgery?
HTN meds (excepts ACEs and ARBs), BBs, anti-depressants, anxiolytics, TCAs (get an EKG), thyroid meds, oral contraceptives (unless they are at high risk of thrombosis, then dc 4 weeks prior), eye drops, Gerd, opioids, anti-convulsants, asthma, corticosteroids, statins, ASA (if they had prior PCI or high grade ischemic disease) COX and MAOIs (avoid demerol and ephedrine)
What medications do you DC prior to surgery?
ASA, P2Y12 (plavix, prasugrel, ticlopidine), topical meds (day of) diuretics (except HCTZ), sildenafil, NSAIDs, Warfarin, post-menopausal HRT, non-insulin anti-diabetics (day of), short acting insulin (if insulin pump, keep it going), long acting insulin (type 1 = take 1/3 usual dose, type 2 = take none or up to half usual dose)
Echinacea effects?
Activates immune system, may decrease effectiveness of immunosuppressants and allergy concerns. No data about need to DC prior to surgery
Ephedra effects?
Increase HR/BP. Increase risk of stroke/tachycardia. Long term use can cause hemodynamic instability d/t decreased catecholamines. Stop 24 hours before
Garlic/Ginseng/Ginger/Ginkgo/Green tea effects?
All have change coagulation. G for bleeding. No data for ginger. Stop garlic /ginseng 7 days before, stop ginkgo 36 hours
Kava effects?
sedative, anxiolytic. Stop 24 hours before
Saw Palmetto
May increase bleeding risk, no data on when to stop
St Johns wort
Helps with depression. Linked with delayed emergence, stop 5 days before
Valeria
Sedation, may increase anesthetic requirements. No data on when to stop
Goals of premedication aspiration prevention?
Less than 25 ml in the stomach and a pH greater than 2.5
What are the risk factors for PONV via the Apfel score? Koivuranta score?
Apfel = Female, hx of PONV, non-smoking status, post-op opioids,
Koi = Female, hx of PONV, non-smoking status, Age less than 50, duration of surgery
Meds that can help prevent PONV?
Scopolamine (watch for dry mouth), Lyrica (MOA unclear), Ondansetron (prevention, not treatment), Phenergan, Dexamethasone
Most common antibiotics and dosages?
Ancef (2 - 3 g, 30 mg/kg in peds, give q4h over 30 min)
Clindamycin (900 mg, 10 mg/kg in peds, give q6h over 30 - 60 min)
Vancomycin (15 mg/kg in adults/peds, infuse 15 mg/min
What should be conducted prior to administration of any mind-altering substance?
An anesthesia timeout, pt name, age, sex, hospital name, MRN, source of history and time of admission
What must be kept in mind regarding temperature in critically ill patients?
Core temperature will likely be different than a temporal/axillary temperature and can affect the temperature which can affect the QI measure
What is anthropometry?
The scientific study of the measurements and proportions of the human body
What areas can be used for a BP measurement?
Radial, PT/DP, brachial and popliteal. Any of these spots can be used for an arterial line too
What risks are involved with a rectal temperature?
Perforation, and avoid in uncooperative or immuno-suppressed patients
Define a pack year for a smoker
1 PPD x 365 days = 1 pack year. Anyone with 55 years or older with a 30+ PPD history = high risk lung cancer
What is the leading cause of beta blocker OD?
Accidental excess intake, particularly with the elderly
What is mediate or indirect percussion used to evaluate?
The abdomen and thorax
What is percussion used to evaluate for?
The presence of air or fluid in body tissues
What is immediate percussion used to evaluate?
The sinus or an infant thorax
What is fist percussion used to evaluate?
The back and kidney
What is circumferential cyanosis?
Blue-ish discoloration around the mouth and NOT on the lips. It is not harmful and should go away with gentle external warming
What are some common causes of jaundice?
Acute inflammation of the liver, inflammation or obstruction of the bile duct, hemolytic anemia, Cholestasis, and pseudo-jaundice (harmless, results from excess of beta-carotene - eating large amounts of carrot, pumpkin or melon)
What are some genetic causes of jaundice?
Crigler-Najjar syndrome - inherited condition that impairs an enzyme responsible for processing bilirubin
Gilberts syndrome - inherited condition that impairs the ability to excrete bile
Dubin-Johnson syndrome - inherited form of chronic jaundice that prevents conjugated bilirubin from being secreted from the cells of the liver
Describe the physiology of Vitiligo
An auto-immune issue where the melanocytes are attacked. Generally shows up after a triggering event like a cut, scrape or bruise
What are “raccoon eyes”?
Battles sign - symptom of a basilar skull fracture
Causes of petechiae?
Prolonged straining, medications, infectious disease, leukemia, thrombocytopenia
Suspect cause of unilateral edema? Bilateral?
Uni = think clot, parasite or injury
Bilat = suspect a central issue such as CHF or systemic infection
What is Koilonychia?
Spoon nails - sign of hypochromic anemia or iron-deficiency anemia. The nails are flat or even concave in shape.
What causes nail clubbing?
Generally a cardiovascular or pulmonary problem, such as lung cancer, ILD or cystic fibrosis.
What is Paronychia?
inflammation around the nail, usually due to a staph aureus infection or candida albicans
What do beau’s lines indicate?
Can indicate a wide variety of issues, such as external injury, infection if its only on one nail.
Multiple nails = systemic illness (ARF, mumps, thyroid, syphilis, chemotherapy, endocarditis, melanoma, DM, pneumonia, scarlet fever, zinc deficiency)
What are some causes of hirsutism?
Polycystic ovary syndrome, cushing syndrome (high levels of cortisol, either an adrenal issue or too much prednisone over time), congenital adrenal hyperplasia, tumors, medications (hair growth medications, minoxidil, rogaine, androgel, testime)
What is ptosis?
Drooping of the eye lid
Ectropion vs entropion?
Ectropion = eversion, eye lid margin turned out
Entropion = inversion, lid margin turns inwards
What is horners syndrome?
When we paralyze a nerve supplying the eye causing miosis (pupil constriction) and a droopy eyelid (ptosis)
Snellen test? Random E test?
Snellen = this is the letter chart you use to assess vision
E = vision test, you use a capital E and rotate it and you have to visually identify it’s position
Webers vs Rinnes test?
W = Tuning fork on the head and feel for vibrations
R = Tuning fork outside the ear or placed on the post-auricular bone
What does cherry lips, bright red skin and bright red blood indicate? Treatment?
Carbon monoxide poisoning. Tx = cyanokit
How to check biceps reflex?
Flex the elbow against resistance, bend arm at 90 degrees, strike the antecubital tendon and the arm should flex
How to check triceps reflex?
Flex the arm at the elbow, bring arm across the chest and strike the tendon behind the elbow, arm should extend
How to check patellar reflex?
Hammer test on the knee, make sure patient is sitting freely
How to check plantar relfex?
lie supine, feet relaxed and stroke the sole of their foot, the toes should flex
How to check gluteal reflex?
Side lying, spread the cheeks and stimulate the perineal area, sphincter should contract
Describe the romberg test
Checks proprioception, pt stands up, eyes closed, and see if they can maintain balance. + test = a proprioception issue
What 3 non-pharmacologic factors can affect a patient perception of pain?
Perceived effective communication, perceived responsiveness of the team, perceived empathy by the team
What is pain catastrophizing?
An exaggerative cognitive response to an anticipated or actual painful stimulus
What other conditions does pain catastrophizing share similarities?
Depression and anxiety
What are the 3 factors that make up catastrophizing?
Magnification: the response that symptoms can be or are greater than expected
Rumination: When an individual focuses repeatedly on attributes of an event that evoke a negative emotional response
Helplessness: The belief that there is nothing that anyone can do to improve a bad situation
What kinds of pain can differentiate the underlying etiology?
Nociceptive (result of direct tissue injury), inflammatory (result of inflammatory mediators) and neuropathic (injury of nerves leading to alteration in sensory transmission)
What are the 2 types of pain that differentiate anatomic location?
Somatic (skin or muscle) and visceral (deep organ)
What is temporal pain?
Acute vs chronic vs acute on chronic
What is inflammatory pain?
Pain that is the result of released inflammatory mediators that control nociceptive input, released at the site of tissue inflammation
What is neuropathic pain?
The result of injury to nerves leading to an alteration in sensory transmission. Can be central or peripheral in nature
What makes up OPQRST pain assessment?
O = onset
P = provocation/palliation
Q = quality
R = region/radiation
S = severity
T = timing
With the equi-analgesic chart, what is the general trend when converting PO to IV dosages?
Generally, the IV dosage is 1/3 to 1/4 the PO dose
What is the pediatric dose for Tylenol?
15 mg/kg q4-6 hours, max of 90 mg/kg/day
What is the procedural dose for ketamine in adults and kids?
Adult = 0.5 - 1 mg/kg
Ped = 1 - 2 mg/kg
What is the sub-dissociative analgesia dose for ketamine IV, IM and Inhalation?
IV = 0.1 - 0.3 mg/kg
IM and INH = 0.5 - 1 mg/kg
What are the concentrations of intranasal ketamine, fentanyl and versed?
Ketamine = 50 mg/ml
Fentanyl = 50 mcg/ml
Versed = 5 mg/ml
What is the advantage of intranasal administration?
Close to the CNS and lungs, so rapid distribution = rapid CSF levels
Describe the basic pharmacokinetics of ketamine
Blocks the N-methyl D-aspartate (NMDA) receptors, peripheral Na channels and u-opioid receptors = sedation, amnesia and analgesia.
High lipid solubility rapid crossing of the BBB and quick onset of action (1 minute) with rapid recovery to baseline
In general, what is the recommended dosing regimen (not numbers here) for using ketamine to treat pain?
A sub-anesthetic dose
What is a common failure in regards to pain management?
Timely reassessment or failure to reassess. Always reassess pain after an intervention.
What are 3 consequences of unrelieved acute pain?
Psychological impacts = PTSD, anxiety, catastrophizing and depression
Chronic pain syndromes can develop, can lead to spinal cord hyper-excitability
Increased mortality/morbidity
How does unrelieved pain impact mortality and morbidity?
Increased oxygen demand, increased metabolic rate, higher rates of cardiovascular/pulmonary complications and reduced immune function
What GA anesthetic sensitizes myocardium?
Halothane
What GA prolongs the QT during induction?
Desflurane
What GA can cause bradycardia in infants?
Sevoflurane
Why can some LA’s be dangerous if given IV? Tx?
Severe bradycardia - treat with lipid rescue
Why are seizure medications a concern?
Because NMBDs lose efficacy if you are on anti-seizure medications
What are 2 hard stops for someone with CHF?
Active chest pain/unstable angina or decompensated heart failure
What is the big question you need to ask asthma patients?
Have you ever had to be put on a ventilator because of your asthma
Why can obese patients take longer to wake up?
Volatiles and injectable sedatives can accumulate in the fat
What are 3 benefits of pre-op evaluation?
Anesthesia is an added risk to surgery, pre-anesthetic evaluation of patients improve clinical safety and minimizes mobility
What are the metric/imperial BMI formulas?
Metric = weight (Kg) / height (meters squared)
Imperial = 703 x weight (lbs) / height (inches squared)
Define the 3 levels of DNR orders
FC
Limited resuscitation defined with regard to specific procedure (may refuse certain resuscitation procedures, make sure pt knows which ones are essential)(try to align with patient goals)
Full DNR
What does a cardiac index risk of 0 through 3 indicate?
0 = 0.4% of a major cardiac event
1 = 1.0%
2 = 2.4%
3 or more = 5.4%
What ABX have the most common causes of anaphylaxis?
Penicillins and cephalosporins
What is red man syndrome?
Histamine induced redness from Vancomycin
What causes the allergic reaction in ester anesthetics?
The preservative PABA - para-aminobenzoic acid
Why would a patient report chest pain as a side effect of lidocaine administration?
Lidocaine can have epinephrine in it
What NMBDs have the highest rate of allergy concerns?
Quaternary ammonium compounds - Sux. Possible cross-reactivity with allergy to neostigmine and morphine
What test do you need to order if a patient is on a TCA?
12-ECG to check QT interval
What is the primary concern if a patient is on an oral contraceptive?
Post-op venous thrombosis