Surgery Shelf Flashcards
What is the ABG consequence of post-op atelectasis?
ventilation-perfusion mismatch –> hypoxemia –> increased WOB –> patients hyperventilate –> respiratory alkalosis
What can be used to rapidly reverse warfarin?
fresh frozen plasma
What factors mitigate hernia formation/enlargement/ recurrence?
- weakened tissue: smoking, age, steroids, immunosuppressive meds, collagen disorders, surgical wounds
- force applied to tissue: heavy lifting, obesity, constipation, cough, trouble urinating
A ____________ hernia enters through a weak point in the fascia of the abdominal wall and its sac is medial to the inferior epigastric vessels
direct hernia
What is Hesselbach’s triangle?
- rectus abdominus
- inguinal ligament
- inferior epigastric artery
Direct inguinal hernias exit through the (superficial/deep) inguinal ring and (can/cannot) extend into the scrotum
- superficial inguinal ring
- cannot extend into the scrotum
A __________ hernia occurs from failure of embryonic closure of the deep inguinal ring after the testicle has passed through
indirect hernia
Which type of polyp has a greater risk of becoming colon cancer?
hyperplastic or adenomatous
adenomatous
What polyp factors should prompt consideration of total colectomy?
- poorly differentiated histology
- lymphovascular invasion
- cancer at the resection or stalk margin or margin <2mm
- invasion into muscular propia of bowel wall
- invasive carcinoma in a sessile (flat) polyp
- invasive carcinoma with incomplete polypectomy
What is used to treat anal fissures and why?
- topical lidocaine: comfort
- nifedipine: vasodilator –> increases blood flow to fissure –> enhances healing
Best treatment options for a blunt trauma patient with pneumoperitonium include all of the following except…
- ABG
- serum lactate
- exploratory laparotomy
- CT CAP
- exploratory laparoscopy
CT chest, abdomen, pelvis
What do scaphoid fractures carry a significant risk for?
osteonecrosis
What complication occurs when too much normal saline is given?
hyperchloremic acidosis
Is LR or NS preferred for large-volume resuscitation?
LR (because normal saline causes hyperchloremia)
What fluids do you give for each of the following Na+ problems?
- hypernatremia: hypovolemic, euvolemic, hypervolemic
- hyponatremia: hypovolemic, euvolemic, hypervolemic
- hypernatremia: hypovolemic (NS), euvolemic (water), hypervolemic (lasix)
- hyponatremia: hypovolemic (NS), euvolemic (water restrict), hypervolemic (water restrict)
What is a local vascular complication of cardiac catheterization that presents with sudden hemodynamic instability?
retroperitoneal hematoma
How do you treat hyperkalemia?
calcium, glucose + insulin, bicarb, beta-agonists
N/V, hyporeflexia, weakness, quadraparesis, coma, bradycardia, and respiratory failure are all signs of what electrolyte disturbance?
hypermagnesium
How does hyperphosphatemia present?
seizures and tetany from low calcium
What is the effect of the following receptors?
- alpha 1
- beta 1
- beta 2
- alpha 1: peripheral squeeze
- beta 1: cardiac contractility
- beta 2: peripheral dilation
What receptors does epinephrine act on?
alpha 1 and beta 1
What receptors does phenylephrine act on?
pure alpha
What receptors does milrinone act on?
PDE inhibitor
What antibiotics should be given for a patient with epididymitis?
CTX, doxycycline, FQs
What does a CT scan with diffuse blurring of the gray-white matter interface and multiple small punctate hemorrhages suggest?
diffuse axonal injury
Trauma –> deteriorating blood gases, “white out” of the lungs on CXR
pulmonary contusion
If a patient undergoes splenectomy, what vaccines must be given postoperatively?
- pneumococcus
- H influenza B
- meningococcus
What is the standard topical agent used to treat patients with burns?
silver sulfadiazine
What does rabies prophylaxis consist of?
immunoglobulin + vaccine
What is the antidote for a black widow spider bite?
IV calcium gluconate
What is Ogilvie syndrome?
paralytic ileum of the colon
From where do each of the following originate?
- epithelial tumor
- sarcoma
- adenocarcinoma
- epithelial tumor: ectoderm
- sarcoma: mesoderm
- adenocarcinoma: endoderm
Severe migratory necrolytic dermatitis, DM, anemia, glossitis, and stomatitis are suggestive of…
glucagonoma
In a baby, green vomiting and a “double-bubble” picture in x-rays (large air-fluid level in stomach, smaller one to its right in 1st portion of duodenum) are found in…
- duodenal atresia
- annular pancreas
- malrotation
What should a patient receive for antibiotics who has been bitten by a cat?
amoxicillin-clavulonate
What is the difference between treatment for subdural and epidural hematoma?
- epidural: emergency craniotomy
- subdural: ICP monitoring, elevate head of bed, hyperventilate, avoid fluid overload, give mannitol or furosemide
Failure to thrive in an infant, pansystolic murmur best heard at L sternal border, and increased pulmonary vascular markings on CXR are suggestive of…
VSD
What does development of diplopia (from paralysis of extrinsic eye muscles) in a patient suffering from frontal or ethmoid sinusitis suggest?
cavernous sinus thrombosis
What should be the urgent treatment for pituitary apoplexy?
steroid replacement (eventually other hormones will need to be replaced)
What it the utility of IVP (intravenous pyelogram)?
- excellent view of kidneys, collecting system, ureters, bladder
- provides help with idea of function of renal parenchyma and for ureters and bladder
Only _____________ can look at the bladder mucosa in detail and aid in detecting early cancers
cystoscopy
What causes pneumaturia?
fistulization between the bladder and GI track, most commonly the sigmoid colon, and most commonly from diverticulitis
Vascular thrombosis that occurs within minutes of re-establishing blood supply to a transplanted organ is a…
hyperacute rejection
What causes hyper acute rejection?
preformed antibodies
What suggests acute organ rejection and when does it occur?
- liver function deterioration (rising GGT, alk phase, bilirubin)
- 5 days to 3 months post-transplant
What is first line therapy for acute organ rejection?
steroid bolus
What type of fluid resuscitation should patients with burns get?
LR
What is the worry if a BUN is >100?
increased risk of post-op bleeding 2/2 uremic platelet dysfunction
What are the most common causes of a non-anion gap metabolic acidosis?
diarrhea, diurectic, renal tubular acidosis
A metabolic alkalosis with a low urine chloride is caused by…
vomiting/NG, antacids, diuretics
A metabolic alkalosis with a high urine chloride is caused by…
Barreter’s, Gittleman’s
Paralysis, ileus, ST depression, and U waves are suggestive of…
hypokalemia
How do you treat a circumferential burn?
escharotomy
What should you think of when you see a post-op patient with decreased platelets and clots?
HIT
A patient has confusion, a petechial rash in the chest, axilla, and neck, and acute SOB. Dx?
fat embolism
When a patient presents with muffled heart sounds, JVD, electrical alternans, and pulses paradoxus, what is the confirmatory test for the diagnosis?
- pericardial tamponade
- FAST scan
What test should be done if blood is seen at the urethral meatus and patient has a high-riding prostate?
retrograde urethrogram