UT San Antonio Flashcards
Absolute contraindications to surgery
Diabetic coma
DKA
3 indications where nutrition is too poor to go to surgery
Albumin 20%
Indications of liver failure being too severe for surgery
Bili > 2
PT > 16
Ammonia > 150
Encephalopathy
How long should you quit smoking prior to surgery
8 weeks prior
6 things in Goldman’s index for evaluating surgical risk
- CHF
- MI w/in 6 months
- Arrythmia
- Old (Age > 70)
- Emergent surgery
- Poor medical condition
Meds to stop before surgery
Aspiring, NSAIDS, vit E (2 weeks)
Warfarin w/in 5 days (INR needs to be
When should a CKD pt dialyze before surgery
24 hours pre-op
Insulin dose before surgery
Take 1/2 morning dose of insulin before
Worry of BUN > 100
Uremic platelet dysfunction leading to post-op bleeding
normal platelet but prolonged bleeding time
What is assist control vent
Sets Tidal Volume and rate, but if the patient takes a breath, the vent gives the full volume
Important vent setting for weaning pt off
Pressure support
Pt rules rate but a boost of pressure is given
Most efficient setting to change on a vent? Why?
Tidal volume - more efficient that FiO2
Hypernatremia fluid
D5W or hypotonic fluid
QT interval for hyper vs hypocalcemia
Shortened in hyper
Prolonged in hypo
signs of hypokalemia
Paralysis, ileus, ST depression, U waves
Maintenance IVFs
D5 1/2 NS + 20 KCl (if peeing)
Maintenance IVF formula
Up to 10 kgs –> 100ml/kg/day
Next 10 kg –> 50 ml/kg/day
All above 20 –> 20 ml/Kg/day
TPN risks
Acalculous cholecystitis
Hyperglycemia
Liver dysfunction
Zinc def
Consider what in circumferential burns
Escharotomy
Tx for CO2 poisoning
100% O2
Hyperbaric if CO0Hb is very high
Unexplained clotting in older people
Think cancer
What disease will heparin not work in
Antithrombin III def
HIT tx
Leparudin or agatroban
Silver sulfadiazine features
Doesn’t penetrate eschar
Can cause **leukopenia
Mafenide features
Burn ointment that penetrates eschar burt hurts like hell
Silver nitrate features
Burn ointment that doesn’t penetrate eschar and causes HYPO K
1st step in electrical burn workup? Look for?
EKG
Look for myoglobinuria (Check K+ from cell lysis)
Zone 3 of the neck? Workup with penetrating trauma?
Above angle of mandible
Do aortography and triple endoscopy
Zone 2 of neck? Workup with penetrating trauma
Angle of mandible to cricoid
Do 2D dopller +/- exploratory surgery
Zone 1 of neck? Workup with penetrating trauma
Below cricoid
Do Aortography
Consider what in retroperitoneal fluid after BAT
Duodenal rupture
Extraperitoneal vs Intraperitoneal extrasvasation for bladder rupture
Extra: bed rest + foley
Intra: Ex-lap and surgical repair
4 fractures that go to OR
- Depressed skull fracture
- Severely depressed or angulated fracture
- Any open Fx
- Femoral neck or intertrochanteric fracture
Where is the clavicle most commonly broken
B/w middle and distal 3rd
May need figure of 8 device
Atelectasis CXR
Bilateral lower lobe fluffy infiltrates
Nec Fasc pattern of spread
In SubQ along Scarpa’s fascia
Malignant hyperthermia genetic defect
Ryanodine receptor gene defect
Unexplained fever post op day 7 think? Dx and Tx?
Abdominal abscess
Dx by CT with triple contrast
Tx by percutaneous drainage
4 stages of pressure ulcers
1: skin intact but red, blanchable
2: blister or break in dermis
3: SubQ destruction into muscle
4: involvement of joint or bone
Low pleural glucose in transudate peracentesis
RA
Lights criteria
Exudate if:
LDH > 200
LHD eff/serum > 0.6
Protein eff/serum > 0.5
When do you operate for lung abscesses
If abs fail
Abscess > 6cm
Empyema present
Popcorn calcification is what in CXR?
Concentric calcification is what?
Popcorn: Hamartoma
Concentric: old granuloma
What do you do if a new benign nodule is found on CXR
CXR or CT scans q2mo to look for growth
Where does adenocarcinoma met to
Liver, bone, brain, adrenals
Effusion of Adenocarcinoma of the lung
Exudate with high hyaluronidase
Lung cancer that makes PTH-rP
Squamous cell Ca
Pt with ptosis that gets better after 1 min of upward gaze?
Lambert Eaton from small cell
Ab to pre-syn Ca channels
CXR showing peripheral cavitation and CT showing distant mets
Large cell carcinoma
3 diagnostic criteria for ARDS
- PaO2/FiO2
Dysphagia worse w/ hot and cold liquids + MI like chest pain likely? Tx?
Diffuse esophogeal spasm
Tx with CCB or nitrates
Tx of choice for Gastric varices
BB is asymptomatic
Band if stable and symptomatic
Type 1 vs 2 hiatal hernia
1: sliding - GE jxn herniates into thorax, worse for GERD
2: Paraesophageal - abd pain leading to obstruction and strangulation - surgery
Work up for suspected gastric ulcer
Double contrast barium swallow
EGD will show punched out lesions with red margins
*Operate if lesion persists after 12 weeks of treatment
Gastric varices in non alcoholic could be
Splenic vein thrombosis
Best test for ZE syndrome
Secretin stimulation test
Bilious vomiting and post-prandial pain after losing lots of weight
SMA syndrome - 3rd part of the duodenum compressed by AA and SMA
4 steps for in pancreatitis tx
NG suction
NPO
IV rehydration
Observation
Bad pancreatitis prognostic factors
Old WBC > 16k Glc >200 LDH > 350 AST > 250 Drop in HCt, dec Ca, acidosis, hypoxia
Things that prevent Whipple in Pancreatic Ca
Mets (abdomen, liver, peritoneum), extension into SMA or portal vein
Whipple’s triad for insulinoma
- Hypoglycemic symptoms
2. Blood glucose
Glucagonoma Symptoms
Hyperglycemia, diarrhea, weight loss
VIPoma symptoms
Watery diarrhea, hypokalemia, dehydration, flushing
looks like carcinoid
Type 1 and Type 5 choledochal cysts
- Fusiform dilation of CBD -> tx w/ excision
5. Caroli’s Dz -> cysts in intrahepatic ducts (needs liver tx)
Dz associated with cholangiocarcinoma
PSC (ass w/ UC)
TIPS AE
Relieves portal HTN but worsens hepatic encephalopathy
HCC tumor marker
AFP
2nd most common benign liver tumor
Focal nodular hyperplasia
RUQ pain + profuse sweating and rigors + Palpable liver likely? Tx?
Entamoeba histolytica
Tx: Metronidazole (DONT DRAIN IT)
Pt from mexico presents with RUQ pain and large liver cysts likely? Tx?
Enchinoccus
Tx: Albendazole and sx to remove ENTIRE cyts
(rupture can lead to anaphylaxis)
Isolated thrombocytopenia? Tx?
ITP
Tx w/ steroids, splenectomy if relapse
Osmotic fragility test for
Hereditary spheroctyosis
Splenectomy can tx
Tx for perforated appendix abscess
Drain, Abx, and appendectomy
Most common site for carcinoid tumor
Appendix
Odd thing to look for in carcinoid
Pellagra due to niacin def
Diarrhea, dementia, dermatitis
When do you do a hemicolectomy for carcinoid of the appendix
If > 2cm, at base of the appendix, or w/ + nodes
When to operate on SBO
Peritoneal signs, inc WBC, or no improvement w/in 48 hrs
Post op ileus X-ray? od thing to cause?
Dilated loops of small bowel w/ air-fluid level
Consider hypoK or opiates
What is Ogilvie’s syndrome
Massive colonic distension in eldery
If
First 2 steps in SBO
IVF, NG tube, bowel rest
Direct inguinal hernias go through
Fascia through Hasselbeck’s triangle
Most common side for indirect inguinal hernias
Right
IBD that commonly involves terminal ileum
Chron’s (can mimic appendicitis)
IBD associated with p-ANCA
UC (also higher risk of Ca)
Give what for any fistula in chrons
Metronidazole
Are diverticulosis true diverticula?
No, only outpocketings of mucosa
When do you do a colonoscopy after acute diverticulitis
4-6 weeks later
Workup for colon Ca
DRE, transrectal US (Depth of invasion), Colonoscopy
CEA for recurrence
CT for staging
Screening for AAA
Ab US on men 65-75 who have ever smoked
Post op-complications of AAA
- MI (#1 cause of death)
- Ischemic colits (bloody poo)
- ASA syndrome (preserved vib sense)
- Aortoenteric fistula (brisk GI bleeding 1-2 years later)
Pain out of proportion to abdominal exam
Think chronic mesenteric ischemia
Dx w/ duplex or angiography
Anticoagulation regimen for DVT
Heparin, then overlap with warfarin for 5 days, then warfarin for 3-6 months
First step in suspected PE?
Heparin!
Papillary thyroid Ca features
MC type, spreads via lymphatics
Psammoma bodies
Follicular thyroid Ca featuers
Spreads via blood
Take out whole thyroid
Hashimoto’s predisposes to what thyroid cancer
Thyroid lymphoma
What would an adrenocortical carcinoma cause? Test to run
Virilization or feminization
Test Urine 17-ketosteroids
Labs in hypoparathyroidism
Dec. Ca and PTH
Inc. PO4
MEN 2a
PTH adenoma
Medullary thyroid cancer
Pheo
MEN 2b
Medullary thyroid cancer
Pheo
Marfanoid
Best imaging for young breast
MRI
Fluid asipirate in fibrocystic changes? Tx
Green or straw colored
Restrict caffeine, take Vit E, wear supportive bra
DCIS surgical tx
Excision with clear margins or simple mastectomy if multiple lesions
Breast Ca more likely to be bilateral
LCIS
Think of what with eczema of nipple
Pagets Dz
Do mammogram to find the mass
Where do you biopsy SCC
Edge of lesion
Worst prognosis melaonoma
Superficial spreading
Where do soft tissue sarcomas spread?
Hemotaogenously to LUNGS
Can do wedge resection
1st step in neck mass workup
MC is reactive node, so examine mouth for inflammatory lesion
Good prognostic factor in Hodgkin’s lymphoma
Lymphocyte predom
Neck mass anterior to SCM likely? If lateral?
Anterior: Branchial cleft cysts
Lateral: Cystic hygroma (Turner’s, Down’s, Klinefelters)
MC salivary gland tumor
Pleomorphic adenoma
Usually on parotid, benign but recurs
MC malignant ENT cancer
Mucoepidermoid carcinoma
Biggest concern for congenital diaphragmatic hernia
Pulmonary hypoplasia
If dx prenatally, deliver at place with ECMO, then let lungs mature and wait 3-4 days for surgery
Baby born with respiratory distress and excess drooling
TE- Fistula
To dx place feeding tube, take X-ray, and see feeding tube coiled in thorax
High maternal what in gastroschisis
AFP
Intestinal atresia ass w/?
Polyhydramnios in pregnancy
Down syndrome
1 wk old baby w/ bilious vomiting, draws his legs up, and has and distention
Malrotation and volvulus
Dx and tx for meconium ileus
Gastrograffin enema
Current jelly stool in baby
Inussusception
Prostate Ca meds
Leuprolide or flutamide
Part of bone osteosarcoma in? Ewings sarcoma?
Metaphysics of long bones
Diaphysis in Ewings (onion skinning)
What is Epi for in local anesthesia
To prevent systemic absorption
Don’t use in fingers, nose, penis, toes
What is Merperidine
Norperidine metabolite that can lower seizure threshold, esp in Renal Failure