1 Flashcards
Most common cause of post-operative hematoma in patients with no personal or family history of easy bleeding or bruising?
Insufficient hemostasis
Presentation - chronic or fluctuating conjugated hyperbilirubinemia and intermittent jaundice
Dubin-Johnson syndrome
Cause of Dubin-Johnson syndrome?
Benign, hereditary defect in hepatic excretion of conjugated bilirubin
Positive urine bilirubin reflects a build-up of conjugated bilirubin - explain.
Conjugated bilirubin is water soluble and readily excreted in urine. Normally, conjugated bilirubin is degraded in the intestines. If levels rise, some will be excreted in urine.
Positive urobilinogen reflects a build-up of unconjugated bilirubin - explain.
Unconjugated bilirubin is highly insoluble and cannot be excreted in urine. Excess undergoes metabolism to form urobilinogen, which is excreted in feces and urine.
What causes Gilbert syndrome?
Decreased bilirubin glucuronidation
Differentiate between Rotor and Dubin-Johnson syndromes?
Histology - black, pigmented liver in DJ, normal in Rotor
Presentation of disseminated gonococcal infection?
Purulent monoarthritis without systemic symptoms
OR
Triad of tenosynovitis, dermatitis, and migratory polyarthralgia
Rx disseminated gonococcal infection
3rd generation cephalosporin IV AND oral azithromycin
Dx disseminated gonococcal infection?
Culture or PCR of blood, synovial fluid, potentially infected mucosal sites
Gram stain and culture are highly specific but insensitive, as >50% have negative culture
Osteogenesis imperfecta:
- Inheritance pattern
- Mutation
Autosomal dominant
Mutations in type 1 collagen
5 U/S findings of type II osteogenesis imperfecta?
- Multiple fractures
- Short femur
- Hypoplastic thoracic cavity
- Fetal growth restriction
- Intrauterine demise
Features of achondroplasia?
- Macrocephaly
- Frontal bossing
- Midface hypoplasia
- Rhizomelia (shortened limbs, especially proximally)
- Trident hand
- Genu varum (bowing of the tibia)
Features of amniotic band sequence?
Limb defects (eg, amputation, hand defects, clubfoot) Craniofacial defects Abdominal wall defects
Features of Potter sequence?
Pulmonary hypoplasia
Limb deformities (eg, clubfoot, hip dislocation)
Oligohydramnios
Most commonly caused by urinary tract abnormalities
Diagnose menopause?
Clinical symptoms
Increased FSH
Presentation - glazed, erythematous vulvar erosions bordered by white striae +/- associated vaginal and oral lesions
Vulvar lichen planus
Rx vulvar lichen planus?
High-potency topical corticosteroids
Dx vulvar lichen planus?
Biopsy (excludes cancer)
What is Todd paralysis?
Transient, focal neurologic deficit, typically manifested by hemiparesis that occurs after either a focal or generalized seizure
What is spondylolisthesis and how does it present?
Anterior slippage of a vertebral body due to bilateral defects of the pars interarticularis (spondylolysis), classically presents in an adolescent with LBP exacerbated by lumbar extension
Rx initial episode of C. difficile?
Vancomycin PO or fidaxomicin
Rx first recurrence of C. difficile?
Vancomycin PO in a prolonged pulse/taper course or fidaxomicin if vancomycin was used in initial episode
Rx multiple recurrences of C. difficile?
Vancomycin PO followed by rifaximin or fecal transplant
Rx fulminant C. difficile (hypotension, shock, ileus, megacolon)?
Metronidazole IV + high-dose vancomycin PO (or PR if ileus present)
Surgical evaluation
Why is IV vancomycin not effective against C. difficile?
It is not excreted into the colon
Diagnostic criteria for acute bacterial rhinosinusitis?
1 of 3:
- Persistent symptoms for 10+ days without improvement
- Severe onset (fever 39+ with drainage) for 3+ days
- Worsening symptoms following initial improvement
Rx acute bacterial rhinosinusitis?
Amoxicillin +/- clavulanate
Most common causes of acute bacterial rhinosinuisitis?
Non-typeable H. influenzae
S. pneumoniae
M. catarrhalis
Most common risk factor for acute bacterial rhinosinusitis? Second most common?
Viral URI; allergic rhinitis
Classic lab findings in infantile hyeprtrophic pyloric stenosis?
Hypochloremic, hypokalemic metabolic alkalosis
Why should electrolytes be normalized and alkalosis corrected prior to surgery in hypetrophic pyloric stenosis?
Decreases the risk of post-operative apnea, improves overall outcomes
Cause of Reye syndrome?
Pediatric aspirin use during influenza or varicella infection
Clinical features of Reye syndrome?
Acute liver failure and encephalopathy
When should you stop Pap testing?
Age 65 or hysterectomy PLUS no history of CIN2 or higher AND 3 consecutive negative Pap tests OR 2 consecutive negative co-testing results
Consider if there are risk factors for cervical cancer.
Frequency of Pap tests?
Begin at age 21 without co-testing every 3 years
At age 30, Pap with co-testing may be done and repeated every 5 years if negative
Features of mild hypothermia?
32-35 C (90-95 F)
Tachycardia, tachypnea
Ataxia, dysarthria, increased shivering
Features of moderate hypothermia?
28-32 C (82-90 F)
Bradycardia, lethargy, hypoventilation, DECREASED SHIVERING, atrial arrhythmias
Features of severe hypothermia?
<28 C (82 F)
Coma, CV collapse, ventricular arrhythmias
General treatment for hypothermia?
Warmed (42 C) crystalloid for hypotension
Endotracheal intubation in comatose patients
Rewarming techniques by classification of hypothermia?
Mild: passive external (remove wet clothes, cover with blankets)
Moderate: active external (warm blankets, heating pads, warm baths)
Severe: active internal (warmed pleural or peritoneal irrigation, warmed humidified oxygen)
Why is the bradycardia associated with hypothermia often refractory to treatment with atropine and cardiac pacing?
Due to decreased reactivity of the pacemaker cells
Presentation - rash after amoxicillin?
Infectious mononucleosis
Lab findings in infectious mononucleosis?
Positive heterophile antibody (Monospot) test -> 25% false-negative rate during 1st week of illness
Atypical lymphocytosis
Transient hepatitis
Cause of hemineglect syndrome?
Non-dominant parietal lobe (R lobe in R-handed individuals)
Most common middle ear pathology in patients with AIDS?
Serous otitis media
Cause of serous otitis media in patients with AIDS?
Auditory tube dysfunction from lymphadenopathy or obstructing lymphoma
Characteristic feature of serous otitis media?
Midle ear effusion without evidence of an acute infection
Presentation of serous otitis media?
Conductive hearing loss
Dull tympanic membrane that is hypomobile on pneumatic otoscopy
4 lab findings of lactose intolerance?
- Positive hydrogen breath test
- Negative stool test for reducing substances
- Low stool pH (due to fermentation products)
- Increased stool osmotic gap (due to unmetabolized lactose and organic acids)
NO steatorrhea
Calculate stool osmotic gap?
290 - [2 (stool Na + stool K)]
> 50 in all forms of osmotic diarrhea
3 dietary recommendations for patients with renal calculi?
- Increase fluid intake
- Decrease sodium intake
- Normal dietary calcium intake
Manage acute low back pain?
Maintain moderate activity
NSAIDs or acetaminophen
Consider muscle relaxants, spinal manipulation, brief course of opioids
Manage chronic low back pain?
Intermittent use of NSAIDs or acetaminophen
PT
Consider TCAs, duloxetine
Common side effect of treatment with dihydropyridine calcium channel blockers (eg, amlodipine)?
Peripheral edema (due to vasodilatory effects on peripheral blood vessels)
What is the purpose of tuberculin skin testing?
Identify asymptomatic patients with prior exposure to M. tuberculosis and latent TB infection
When the PPD induration is 15+ mm, who is treated?
Everyone
When the PPD induration is 10+ mm, who is treated?
- Recent immigrants (<5 years) from TB-endemic areas
- Injection drug users
- Residents and employees of high-risk settings
- Mycobacteriology lab personnel
- Higher risk for TB reactivation (immunosupressed)
- Children <4, those exposed to adults in high-risk categories
When the PPD induration is 5+ mm, who is treated?
- HIV-positive patients
- Recent contacts of known TB case
- Nodular or fibrotic changes on CXR consistent with previously healed TB
- Organ transplant recipients and other immunosuppressed patients
Rx latent TB?
- Insoniazid + rifapentine weekly for 3 months under direct observation (not recommended in HIV)
- Isoniazid monotherapy for 6-9 months
- Rifampin for 4 months
Add pyridoxine to prevent neuropathies in patients taking isoniazid who have DM, uremia, alcoholism, malnutrition, HIV, pregnancy, epilepsy
Rx active pulmonary TB?
RIPE for 8 weeks, then isoniazid and rifampin for another 4 months