Internal Medicine Outpatient Rotation Flashcards
Sort Chronic Otitis Externa and Swimmer’s Ear from Malignant Otitis Externa
Chronic Otitis Externa:
When uncomplicated by otitis media or excessive edema, drainage or celluilits is usually itchy as it’s caused mostly by allergic rxn.
-Try OTC antihistamines and otic steroids.
Swimmer’s Ear
Usually Acute and presents with pain on moving pinna/auricle. Usually Pseudomonas. TM intact and usually visible if uncomplicated.
-Rx Wick in Cipro otic with Steroid.
- Prevention is Swimmer’s Ear otic drops
Home-made is 1/2 Rubbing ETOH + 1/2 Vinegar
The ETOH combines with water to dry and the
Vinegar creates a hostile envr. for pseudomonas
Malignant Otitis Externa/ Necrotizing - Is a rare complication of chronic otitis externa, thus also usually caused by Pseudomanas A.
Diabetics and Immunocompromised patients are more susceptible. DM more likely to have Candida (white fungus on canal debris) or Aspergillus (grey fungus on canal debris) The external canal is usually so edematous you cannot see the TM, there is foul drainage, perhaps green, and "deep otalgia" or pain deep in the ear. Cranial Nerve Palsies may result and infection can spread to the base of the skull - Life Threat - Control Sugar or Correct Immune Compromise - ESR, CBC, CULTURE the discharge/necrotic tissue - Get CT and/or Radionuclide Scan if you can Dx confirmed by osseous erosion shown on CT/scan and you want to confirm if bone is involved. - Start Cipro/Gentamycin PO/IV and Cipro/Steroid Otic on a wick. - You could start IV Zosin to start and back down to Cipro if culture indicates sensitivity -Debride canal ONLY if TM is visible and intact
Fluctuant soft tissue mass, often found in axilla, neck and perirectal regions, no erythema or warmth.
Rx?
Incision and Drainage perhaps with a wick for drainage but definitely left open to heal.
This is a SIMPLE CUTANEOUS ABSCESS
Often seen in IV/IM Drug abusers
Usually Staph or Strep Pyogenes
Sort Mild Persistant Asthma from Moderate Persistent and Severe
Moderate is Daily
Mild is more than 2X a week but not daily
Severe Persistant is continual and exacerbations limit activity
What is Ideopathic Pulmonary Fibrosis and how is it treated?
Scarring from repeated Alveoitis (think smokers so it’s not entirely idiopathic…)
Looks like Honey Comb on CT
Treatment is OXYGEN, PULMONARY REHAB + Supportive care
Neither albuterol nor steroids help fibrosis. DO get your pt VACCINATED to reduce risk of pneumonia as that will exacerbate the problem.
Symmetric DESCENDING muscle weakness, think
Botulism
Clostridium Botulinum
Upper Extremities more affected by the weakness than Lower Extremities.
No fever, No loss of consciousness and No Tachycardia
Most cases are in Infants from Honey and/or Corn Syrup
but Home Canning is also a source: Jams
LisFranc Injury
Tarsometatarsal Joint sprain or fracture
Pain @ dorsal mid-foot especially when heel is held and foot is rotated (forefoot rotation against a stabilized hind foot). Flexion + Extension of toes not painful
Metatarsals meet tarsal bones (3 cuneiform and the cuboid) right there at the dorsal mid-foot. Metatarsals can be fractured, the tarsal bones can be fractured and all can be dislocated - more typically laterally than medially and dorsally as opposed to ventrally.
Neither a tibiomalleolar sprain nor a fibulatalar sprain hurts on the mid dorsal aspect of the foot on stabilized rotation of forefoot.
Bones that form the ANKLE
Tibia, Fibula and Talus
The DISTAL TIBIA forms the Medial Malleolus
the DISTAL FIBULA forms the Lateral Malleolus
The SPACE between the distal Tibia and Fibula and the “dome” or superior aspect of the Talus is called the
JOINT SPACe
Ankle FRACTURES mostly involve the distal Tibia
Ankle SPRAINS most
Most common Ankle Fracture involves which bone
Distal TIBIA
What is the most common Ankle Sprain site?
Lateral Malleolus: the FibuloTalar ligaments stretch when the foot inverts or rolls under the leg.
Ligaments most commonly stretched in a Fibulotalar lateral malleolar sprain are:
- Anterior TaloFibular Ligament. Holds the top of the Talus to the anterior distal fibular head -Calcaneal Fibular Ligament. Holds the inferior fibular head to the Lateral Calcaneous or heel bone
Mortise Ankle View on Xray, describe?
AP of ankle should show equal joint space all along the talar “dome” or the top of the talus. The talus sits atop the calcareous and communicates anteriorly with the tarsal bones (3 cuneiform and the cuboid) which in turn communicate with the 5 metatarsals.
How to Dx and Rx an ankle sprain?
XRay will show normal joint space and no distal tibial, fibular or talar fracture.
There will be pain, bruising and swelling on the lateral malleolus in an inversion sprain.
In a mild sprain, the pt can bear weight - No need to immobilize the joint. Crutches and an ace with RICE
RICE for sprains, explain:
REST : but only for a few days. Thereafter weight bearing
is good for recovery
ICE: Control that swelling but only 1st 24hrs, thereafter heat
COMPRESSION: Control that swelling. Compression keeps
Plasma in the vasculature
TYLENOL: Use NSAIDS to control pain. The ice
should handle inflammation immediately. Tylenol isn’t
good for inflammation, only pain.
High Ankle Sprain
Tear of the ligament that holds the proximal tibia and fibula together (aka the syndesmosis)
Degrees of Frostbite, Dx + Rx?
Digits, ears, nose, cheeks, extremities
1st degree frostbite: Anesthesia + Erythema, Shiny
2nd: Anesthesia, Erythema, Edema CLEAR BLISTERS
3rd degree: Hemorrhagic blood filled Blisters, possibly
Quite large and encompassing the digit.
But… Still soft when pressed upon (gently)
4th degree: Solid, waxy white, obviously frozen
RX:
FIRST: Assess for hypothermia and treat that
SECOND: Immerse damaged tissue in warm, gently circulating water (95F) slowly warm but not above 107F.
Hypothermia, Dx + Rx
Core Temp below 97F or 35C (rectal or esophageal for
Intubated patients.
95F - 90F Awake + Shivering stops at 90F
90F-82F Drowsy, not shivering
82F-68F Unconscious, not shivering
Below 68F/20C No Vitals, Profound Hypothermia
Coma and death
Think ETOH with hypothermia. Give Thiamine BEFORE Dextrose IV as alcoholics so profoundly affected may have Wernike’s Encephalopathy and need Thiamine. Glucose metabolism is thiamine dependent so give the thiamine first as giving dextrose first can worsen the Wernike’s symptoms.
Rewarming MODERATE (above 82F) Hypothermia:
- Dry warm blankets,
- Progressively warmer hot water bottles to the axilla and groin and around the neck.
- Warm IV fluids Thiamine then NS 5% dextrose
Core Temp After Drop
Decrease in BP after rewarming due to cardiac arrhythmia
Frozen cells leak K+ into the blood on rewarming. Hyperkalemia causes widening of the QRS, Peaky Ts as repolarization slows and bradycardia.
Brady causes low blood pressure
Whooping Cough Sx, Dx, Rx:
Three stages of Pertussis Bordatella:
CATARRHYL: Cold Sxs and cough 7-10 days.
PAROXSYSMAL: Coughing fits unto Post Tussive Emesis
possibly even apneic pds after a coughing
fit. This is where the
INSPIRATORY WHOOP appears
Rarely, SEIZURES occur from the coughing
Rx NOW with MACROLIDE to reduce infectivity. The course for the patient is set though and will not be shortened by
the Macrolide.
CONVALESCENT: sometimes up to 3 months during which
Cough tapers and eventually ends.
Mainly incompletely vaccinated infants under 1 yr or adults who have not had boosters.
Hypertension Labs
Urinalysis: Protein and/or Sugar in the urine points to
Renal Malfunction
CMP - you want electrolytes, BUN, Cr, Glucose AND Liver
enzymes and Billirubin.
CBC - Sick?? Anemic???
ECG - What’s going on in the heart?….
BMP
8 Tests:
Blood Glucose Ca++ Na+ K+ Cl- CO2/ HCO3-- BUN Cr
CMP
CMP = BMP + Proteins and Liver Enzymes
Albumin- high when glomerulus has holes in it or when
blood pressure just pushes stuff through
Total Protein- same as above, albumin + Hb
AST
ALP- All four elevate in cirrhosis and hepatic
ALT
Bilirubin
AST
Aspartate Amino Transferase,
Normal is 6-40, males higher
Found in Liver, Brain, Heart, Muscle and RBCs. AST is not specific to any one of them and only indicates liver dz when it rises WITH ALT, which IS Liver-Specific
Elevated alone AST could indicate toxicity of:
A: Alcohol
S: Statins
T: Tylenol
Elevated with ALT and ALP you’re looking at liver dz
ALP
Alkaline Phosphatase
Normal is 20-140mg/dL higher in kids and pregn females
Elevated alone think GROWTH
- If a child/adolescent, think normal growth ongoing
- If adult think bone cancer, growth of tumors that increase phosphate in the blood.
Elevated with ALT and AST, Liver Dz. Hepatocytes are dying and dumping their enzymes into the blood.
ALT
Alanine Amino Transferase
The MOST sensitive liver health marker. Only found in hepatocytes. Increases when hepatocytes rupture and spill cellular contents into the portal blood.
Females Under 34
Males under 52
Bilirubin
Total Bilirubin : 0.3 - 1.9ml/dL
Direct Bilirubin (conjugated): 0 - 0 .3 ml/dL
Indirect (unconjugated) Bilirubin = Total minus direct
Bilirubin over 2.5mg/dL causes JAUNDICE
Bilirubin crosses the BBB and causes ICP - Increased IntraCranial Pressure
High UNconjugated (indirect) Bilirubin is common in infants who got a lot of blood back from the umbilical cord which RBCs are breaking down and whose little livers are just not quite online yet’
BUT… in adults, High Unconjugated Bilirubin could
be causes by heart failure, the pump not being strong
enough to push the blood effectively through the liver
especially if the liver is also damaged and/or fibrosed.
High Conjugated (direct) Bilirubin indicates the liver is doing its job but billirubin conjugated for excretion in feces, urine and bile just isn’t getting out. Think bile duct blockage, Gallstones, Hepatitis. Could also be sepsis where RBCs are just getting shredded and the liver can’t keep up with recycling the Heme.
Rifampin (TB regimen) and Probenecid (Gout prophylaxis) can both cause Jaundice by decreasing hepatic uptake of unconjugated billirubin.