IPC lectures
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- 3 Key questions to ask in arthralgia?
-
Inflammatory or not?
Number and pattern of joints?
Other organs involved? - Types of inflammatory arthritis:
-
Rheumatoid
Spondyloarthropathies
SLE - Types of non-inflammatory arthritis:
-
Osteoarthritis
Gout - 3 signs of inflammatory arthritis:
-
Morning stiffness > 1hr
Constituational symptoms
Worst pain after inactivity - 3 signs of non-inflammatory arthritis:
-
Brief morning stiffness
No constitutional symptoms
Worst pain after activity - DDx of monoarthritis:
-
Infection
Trauma
Crystaline arthropathies - INFECTIOUS DDx of polyarthropathies:
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bacterial sepsis
viral (Parvo, HIV, HepC)
Lyme
Subacute bacterial endocarditis
Rheumatic fever - NON-INFECTIOUS DDx of polyarthropathies:
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RA/Juvenile rheumatoid arthritis
SLE and other connective tissue diseases
Spondylarthropathies
Gout and pseudogout
Vasculitis
Sickle-cell disease
Osteoarthritis - Joints involved in RA vs OA:
-
RA: Hands(MCPs), spine, hips, knees, feet NOT wrists, elbows
OA: Hands, wrists, elbows, knees, feet NOT lower back - Symmetrical polyarthritis usually...
- RA
- Assymmetrical polyarthritis usually...
- OA, Gout
- Polyarthritis with important spinal involvement...
- Spondyloarthropathies (Ankylosing Spondylitis, Psoriatic, Reactive, IBD-related)
- Metacarpal squeeze...
- If positive sign of RA.
- Raynaud’s phenomenon
- Blanching of ring, pinky finger.
- ENA (the ANA profile): measures what and each indicates what?
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Anti-DNA: lupus
Anti-Smith: lupus
Anti-Ro and anti-La: Sjogren’s syndrome
Anti-RNP: mixed connective tissue disease - Rheumatoid factor
-
Present in 2/3 pts w rheumatoid arthritis.
Other autoimmune diseases
Predicts poor outcome. - Anti-CCP antibodies
-
CCP= cyclic citrullinated peptides
More sensitive and specific for rheumatoid arthritis - HLA B-27
- Associated with spondyloarthropathies
- ANCA
- Associated with vasculitis
- Stepwise EKG analysis:
-
Rate
Rhythm
Axis
Intervals
Hypertrophy
Infarct
Ischemia - EKG Morphology heirarchy:
- LBBB > LVH > MI
- P wave axis should be positive in...
- I, II, III, aVF
- QRS axis in youth vs elderly
-
+90 (vertical)
to
-30 (elderly) - Normal PR interval
- .12-.21
- Normal QRS interval
- <.10
- QTc interval, definition and normal
-
Time from Q start to T END.
observed QT/sqrt(RR) interval
<.46s
RR = time between QRS complexes. - T wave should be pointing:
- In direction of QRS complex of that lead.
- High voltage...
- Can be benign in youth... check for axis near +90
- "Improper standardization"
-
Check voltage standard... = 10mv
Check paper speed, normal 25mm/s - Atrial bigeminy
- PAB coupled at the end of each normal beat... couplets.
- RBBB
- Long QRS interval. Bunny ears in V1, V2.
- LBBB
- Long QRS interval. R, R' "plateau" in V5, V6
- "Posterior axis"
- Significantly negative R waves in V1, 2, 3, 4 and even 5.
- Right atrial enlargement
- Check II, V1 for large P waves, diphasic P waves.
- Evolution of MI
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Acute: ST elevation, peaked T
T wave inversion, Q waves
ST returns, T inversion continues
Qs persist ST and T may return. - Significant Q waves...
-
> 1 small box wide OR >1/3 amplitude of QRS.
Sign of necrosis. - T wave inversion...
- Symmetrical in ischemia. Usually in lead that shows infarction (Q waves, ST elevation).
- POSTERIOR infarct: vessel and signs
-
RCA
Large R with ST depression in V1, V2. - Inferior infarct: vessel and signs
-
RCA or LCA
Qs in inferior leads II, III, AVF
OR if no Qs, ST elevation in those. - Lateral infarct: vessel and signs
-
Circumflex
Qs in lateral leads I, AVL
OR if no Qs, ST elevation in those. - Anterior infarct: vessel and signs
-
L. Anterior Descending artery
Qs in V1, V2, V3, V4
OR if no Qs, ST elevation in those. - Stress test: sign of postive
- ST depression. Locate just like infarct.
- Hyperkalemia:
-
Moderate: wide/flat P, wide QRS, peaked T
Extreme: no P, VERY wide QRS - Hypokalemia:
-
Moderate: Flat T, U wave after T
Extreme: prominent U wave after T - Very peaked T waves:
- Hyperkalemia
- Prolonged QT:
- Drugs... may lead to polymorphic VT escape rhythms.
- Low voltage: values and causes
-
< 5mm in limb
< 10mm in chest
Obesity, hypothyroid, pericardial fluids, COPD, improper leads - 9 basic causes of chest pain:
-
Heart - CAD, valves, carditis
Lung - pneumonia, PE
Aortic - dissection, rupture
Chestwall - ribs, muscle, pleura
Esophogeal - ulcer, reflux, tear
Abdominal - infection/flammation
Trauma
Tumors/Masses
Anxiety/Panic disorder - Pneumothorax on CXR:
- Check for LACK OF ANY vascular markings beyond a certain point.
- Aortic dissection on CXR:
- Huge aortic knob, very visible aorta.
- Aortic dissection on CT:
- Look for dual lumen.
- 3 types of headaches:
-
Vascular
Tension
Traction/Inflammatory - Types of vascular headache
-
Migrane: w/ or w/o aura. May be complicated by hemiplegia.
Cluster headaches: toxic vascular, hypertensive - Types of tension headache
-
Primary tension type headache (episodic)
Chronic anxiety states
Depression
Cervical Osteoarthritis
Chronic myositis - Types of traction headache
-
Diseases of the eyes, ears, nose, throat, sinuses, and teeth
Mass lesions
Arteritis, phlebitis, cranial neuralgias
Occlusive vascular disease
Atypical facial pain
Temporomandibular disease - Physiology of migraine:
- During a migraine there is cerebrovascular vasodilatation and a generalized systemic vasoconstriction
- Nerve source of migraine:
- Trigeminal. releases substance P and CRCP (calcitonin gene related peptide) into dural and meningeal blood vessels. Degranulation of mast cells --> PMNs. Vasodilation results.
- Serotonin receptors, role in migraine:
- Block neurogenic inflammation. (5-HT 1D).
- Criteria of migraine w/o aura
-
4-72 hrs.
2/4: Unilateral pain, Throbbing Aggravation on movement, Pain of moderate or severe intensity.
1/2: Nausea or vomiting, Photophobia or phonophobia - What is an aura in migraine?
-
15% of patients have it.
Precede or accompany the attack.
Usually visual (lights, dark spots, jagged lines) or sensory (face or arm numbness).
Duration of aura usually less than an hour. - Medication for mild/moderate migraine:
- NSAIDS, caffeine, "Midrin" (aspirin, isometheptene, dichloralphenazone)
- Triptans, what are they and when to use.
-
Seratonin agonists.
Use in patients with severe, diabilitating, rapid, and unresponsive migraine. - Stratified treatment for migraines:
-
Acute treatment drug A
Backup treatment drug B
Rescue treatment drug C - Tension headache characteristics:
- Bilateral, pressing or tightning quality. Not associated with vomiting or physical activity.
- Cluster headache characteristics:
-
1:1000
Male:female 5:1
Unilateral severe headache in V1 and V2 trigeminal nerve distribution
conjunctival injection, lacrimation, rhinorrhea, ptosis, miosis, and nasal congestion - Gross hematuria:
-
GU malignancy until proven otherwise.
50% with bladder cancer (age greater than 50).
Anticoagulation does not cause hematuria. - Approach to chest xray:
-
TTABC:
Technique
Tubes
Abdommen
Bone
Chest - Intussusceptum
- Prolapse of the Ileum into the cecum
- UTI definition:
- 100,000 bacteria/cc mid stream diagnostic.
- Ureterocele
- The distal ureter balloons at its opening into the bladder, forming a sac-like pouch. More common with duplicated collecting system.
- Turners syndrome is associated with this anomaly of the GU tract:
- Kidney missing, horseshoe kidney etc.
- Drooping lily sign:
- Identified at excretory urography in patients with duplicated renal collecting systems.
- UVJ obstruction
- ureter/bladder junction obstruction.
- UPJ obstruction
- ureter/pelvic(Renal) junction obstruction
- Vesicoureteral reflux:
-
Strong familiar assocation.
Primary abnormality NOT secondary to obstruction/infection.
Often causes UTI... - Vesicoureteral reflux grading:
-
1-5.
1. partial ureter
2. to pelvis
3. slightly dilated pelvis
4. moderately dilated pelvis
5. VERY dilated pelvis and ureter - Visceral abdominal pain
-
Dull and aching, but can be colicky.
Poorly localized to the mid-epigastrium, peri-umbilical region, or lower mid-abdomen.
When severe, patients may move or writhe in agony. - Parietal abdominal pain
- Noxious stimulation of the parietal peritoneum. Generally more intense & more precisely localized than visceral pain. Aggravated by movement or coughing. Patients with peritonitis generally don’t move for fear of aggravating pain.
- Referred abdominal pain examples:
-
Usually well localized.
diaphragmatic irritation from a ruptured spleen or subphrenic abscess can be referred to the shoulder. Pain from an inflammed gallbladder can be referred to the scapular area. The pain associated with a ureteral stone can radiate from the flank down to the ipsilateral testis or vulva. - Functional abdominal pain
- Patients perceive pain related to heightened sensitivity of gut neurons to endogenous stimuli (visceral hypersensation). Examples: Irritable bowel syndrome, functional abdominal pain, nonspecific dyspepsia
- Extra-abdominal causes of abdominal pain, examples:
-
Extra-abdominal causes (e.g. MI, pneumonitis)
Acute systemic illnesses (e.g. porphyria, lead poisoning) - “Acute Abdomenâ€
- Sometimes used interchangeably with “abdominal emergency.â€
- Questions to ask about pain:
-
Chronology
Location
Radiation
Intensity and character
Aggravating and alleviating factors
Associated symptoms - Questions to ask in history of abdominal pain:
-
Pain characteristics
Menstrual history in women
Sexual history (can be important)
Current meds
Past medical history
Review of symptoms
Family and social history - 10 specific causes of acute abdomen
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Acute appendicitis
Acute colonic diverticulitis
Acute intestinal obstruction
Perforated duodenal ulcer
Biliary colic & acute cholecystitis
Choledocholithiasis
Acute pancreatitis
Acute mesenteric ischemia
Ruptured abdominal aortic aneurysm
Other causes - Acute appendicitis: characteristics
-
Most common acute abdominal emergency.
Begins as a vague peri-umbilical or epigastric pain.
Within 6-8 hrs, the pain migrates to the RLQ and peritoneal signs develop.
Diagnosis can be made on clinical grounds 50-60% cases.
US or CT can help if diagnosis not certain. - Acute colonic diverticulitis: characteristics
-
Most common in the sigmoid colon.
Initially, a visceral-type lower abdominal pain.
Later, as localized peritoneal irritation occurs, LLQ parietal pain occurs.
Classic features = LLQ pain, fever, leukocytosis.
Mild cases can be diagnosed on clinical grounds.
CT = best test to confirm diagnosis. - Acute intestinal obstruction: characteristics
-
Commonest cause of SBO – postop adhesions.
Higher the obstruction, the more severe the symptoms.
Colicky peri-umbilical pain that comes in waves.
Vomiting common
PE: Periods of increased high-pitched BS; later BS disappear. Distention & tenderness also common.
Initial evaluation = abdominal x-ray series - Perforated duodenal ulcer: characteristics
-
Free perforation into peritoneal cavity = life-threatening emergency
Sudden onset of severe epigastric pain, later generalized (chemical peritonitis)
Nausea & vomiting common
PE: Diffuse peritonitis Deterioration over a period of hours
Initial evaluation = abdominal x-ray series - Biliary colic: characteristics
-
Caused by intermittent obstruction of cystic duct by a stone.
Pain of biliary colic visceral & felt in RUQ or epigastrium
Colic a misnomer (pain usually steady)
Resolves within 4-6 hours
Initial evaluation: WBC, LTs, amylase, upper abd US - Acute cholecystitis: characteristics
-
Biliary colic with stone remains impacted -> damage GB mucosa -> release intracellular enzymes -> inflammation
Pain of AC similar to biliary colic, except doesn’t go away. As inflammation progresses, parietal pain localized to RUQ occurs
Tests: WBC, LTs, amylase, upper abd US - Acute pancreatitis: characteristics
-
Acute inflammatory condition of pancreas...most common causes = CBD stone & ETOH
Rapid onset of severe constant epigastric pain that can radiate into the back.
Tests: elevated serum amylase, results of abdominal xray, US - Acute mesenteric ischemia: characteristics
-
Causes: SMA embolus or thrombosis (60%), non-occlusive mesenteric ischemia (25%).
Presentation with acute, often sudden, crampy peri-umbilical pain.
Pain out of proportion from PE.
Evaluation = abdominal x-rays, CT, angiography. - Ruptured abdominal aortic aneurysm (AAA): characteristics
-
Acute severe pain of sudden onset (mid-abdomen, back or flank). [often “tearingâ€]
Classical triad of hypotn, pulsatile mass & pain (75%).
Dx requires high index of suspicion, & requires emergent surgery. - Causes of chronic abdominal pain:
-
Chronic pancreatitis
Gallstones
Peptic ulcer disease
Inflammatory bowel disease
Malignancy
Irritable bowel syndrome
Sphincter of Oddi dysfunction - 6 rare, unusual and misc. causes of abdominal pain:
-
Lead & arsenic poisoning
Acute porphyrias
Hereditary Mediterranean Fever
Angioedema syndrome
Abdominal epilepsy & migraine
Abdominal wall pain - 9 absolute contraindications to exercise stress testing:
-
Acute MI
Unstable angina
Uncontrolled arrhythmias
Severe Aortic stenosis
Decompensated CHF
Acute PE
Acute myocarditis/pericarditis
Acute aortic dissection
Acutely ill patients - 7 absolute indication to STOP stress testing:
-
Systolic drop in BP>10mmHg w/ischemia
Moderate to severe angina
ST elevation without underlying Qs
Neurologic symptoms
Signs of poor perfusion
Patient desire to quit
Sustained VT - Stress testing protocols:
-
Bruce protocol:
Stage I 1.7mph, 10%grade
Increase ~0.8mph, 2%grade each 3 min. - Signs of a positive stress test:
-
ST segment depression.
New left axis
1 mm horizontal depression 80 msec after the J point, 3 beats in a row - How does a resting RBBB, LVH, or ST-T abnormalities effect the stress test?
- Difficult to interpret because of pathology.
- 5 findings associated with severe CAD in stress testing:
-
Marked ST depression
Early positive (< Stage II)
Hypotension with exercise
Prolonged recovery
Exercise-induced VT
Inability to increase HR - Duke treadmill score system, predictor
-
Exercise time – 5 x (ST depression) - 4 x angina index (0,1,2)
< -11 high risk
-10 to 4 moderate risk
> 5 low risk - Angina index (3 factors)
-
Improves with rest.
Exertional
Substernal - Agent used in pharmacologic stress testing?
-
Adenosine -- increases coronary blood flow.
Side effects: bronchospasm, AV block - Transitional cell carcinoma, sign on IVP:
- Champaign glass of ureter.
- Wilms tumor: signs
-
“Claw†sign (normal renal tissue at periphery of mass)
Large, exophytic growth - 3-6-9 rule for bowel dilation:
-
Dilated if more than:
3cm small bowel
6cm large bowel
9cm cecum