gasguide
← /practice

/practice/cases

Surgical case library

Every surgery, grouped by specialty. Each case: patient phenotype, anesthetic plan, biggest 3-6 anesthesia concerns by phase (preop / induction / intraop / emergence / pacu), and mock-defense scenario openers built from the case. 95 cases live across 15 specialties — actively expanding.

General Surgery

15 cases

Lap chole, exploratory lap, hernias, bowel resections, appendectomy

Laparoscopic Cholecystectomy

Most commonly female, 30s–50s, BMI often elevated, occasional cardiopulmonary disease. Typical American: GERD, obesity, sometimes diabetes. Outpatient unless conversion or comorbidity.

6 concerns·2 mock

Exploratory Laparotomy (Emergent)

Acute abdomen — perforated viscus, ischemic bowel, ruptured AAA, gunshot/trauma. Often septic, hypovolemic, full stomach. Age varies wildly.

6 concerns·2 mock

Laparoscopic Sleeve Gastrectomy

BMI ≥ 40 (or ≥ 35 with comorbidity). Often: T2DM, OSA (frequently undiagnosed), HTN, hypercholesterolemia, GERD, hypothyroidism. Age 30-60 typical.

6 concerns·1 mock

ECT (Electroconvulsive Therapy)

Severe depression / catatonia / treatment-resistant schizophrenia. Multiple sessions (typically 6-12 across 3-4 weeks). Often elderly + medical comorbidities. Same patient back q2-3 days.

6 concerns·1 mock

Inguinal Hernia Repair (open or lap)

Adult male predominantly (10:1), elderly more incarceration risk. Outpatient surgery typical. May be elective (reducible) or emergent (incarcerated/strangulated).

6 concerns·1 mock

Laparoscopic Appendectomy

Most often young adult (15-40), acute appendicitis. May be febrile, dehydrated, leukocytosis. Pediatric appendicitis is the most common surgical emergency in kids 6-15.

6 concerns·1 mock

Whipple (Pancreaticoduodenectomy)

Typically 60s–70s, painless jaundice, weight loss, often poor nutrition. Most common indication is pancreatic head adenocarcinoma; also ampullary, distal CBD, or duodenal tumors. Often diabetic, frequently with biliary stents already in place.

7 concerns·2 mock

Colectomy / Bowel Resection

Wide range: colorectal cancer (60s–70s, often anemic, sometimes obstructed), inflammatory bowel disease (younger, on biologics + steroids), diverticular disease. May be open, laparoscopic, or robotic. Mostly elective but can be emergent for perforation/obstruction.

6 concerns·1 mock

Roux-en-Y Gastric Bypass

BMI ≥ 40 (or ≥ 35 with comorbidities). Almost universally OSA, hypertension, T2DM, GERD, possible obesity hypoventilation, NASH. Usually well-screened in pre-bariatric clinic with optimization done. 30s-60s.

7 concerns·1 mock

Pheochromocytoma Resection

Catecholamine-secreting adrenal (or extra-adrenal/paraganglioma) tumor. Classic triad: episodic headache + palpitations + diaphoresis with paroxysmal hypertension. Often misdiagnosed for years. May present with stroke, MI, cardiomyopathy, or as incidentaloma. Often associated with MEN2, VHL, NF1.

6 concerns·2 mock

Splenectomy (Open or Laparoscopic)

Indications: ITP, hereditary spherocytosis, lymphoma staging, traumatic rupture (emergent), splenic abscess. Elective patients often pre-vaccinated (encapsulated organisms). Trauma patients hemodynamically unstable.

5 concerns·1 mock

Nissen Fundoplication / Hiatal Hernia Repair

GERD refractory to PPI, large hiatal hernia, sometimes Barrett's. Often obese, cardiopulmonary comorbidities. Older patients with paraesophageal hernia at risk for incarceration.

5 concerns·1 mock

Adrenalectomy (Non-Pheo)

Cushing's syndrome (cortisol excess), Conn's (aldosteronoma → HTN, hypokalemia), incidentaloma, metastasis. Each has distinct preop physiology. Cushing's = obese, fragile skin, hyperglycemia, HTN; Conn's = HTN + low K.

5 concerns·1 mock

ERCP (Off-Floor / Endoscopy)

Choledocholithiasis, pancreatitis, biliary obstruction, post-cholecystectomy stricture. Often elderly, malnourished, septic. Cholangitis cases very sick.

6 concerns·1 mock

Mastectomy + Axillary Lymph Node Dissection

Breast cancer, often middle-aged to elderly female. Some on neoadjuvant chemo (cardiotoxic anthracyclines, capecitabine). Often anxious. Comorbidities variable. May be combined with immediate reconstruction.

5 concerns·1 mock

Vascular

6 cases

CEA, AAA, fem-pop, AV fistula, EVAR

Cardiac

9 cases

CABG, valve replacement, TAVR, AICD

CABG (on-pump, elective)

Typically male 55–75, multi-vessel CAD, often diabetic, ex-smoker, on dual antiplatelet + statin + β-blocker. May have preserved or reduced EF. Last meal NPO since midnight.

6 concerns·2 mock

Surgical Aortic Valve Replacement (SAVR)

Severe aortic stenosis (AVA < 1.0 cm², peak gradient > 40 mmHg) or aortic regurgitation. Typically 70-85, often with CAD, HTN, AF. May have syncope, angina, or CHF as presenting symptom.

6 concerns·1 mock

TAVR (Transcatheter Aortic Valve Replacement)

Severe AS with high surgical risk (STS score > 8% historically; expanding to intermediate + low risk). Typically 75-95, multi-comorbid, often deemed too sick for SAVR. Outpatient or 1-night admission becoming common.

6 concerns·1 mock

AICD / Pacemaker Placement

AICD: ICM/NICM with EF < 35%, sustained VT/VF, primary or secondary prevention. PPM: heart block, sick sinus, AF with bradycardia. Often elderly + multi-comorbid.

6 concerns·1 mock

Mitral Valve Replacement / Repair

Severe mitral regurgitation (degenerative, functional, ischemic) or stenosis (rheumatic — declining incidence). Often AF, pulmonary hypertension, dilated LA. EF preserved early in MR (eccentric hypertrophy compensates), drops late.

7 concerns·1 mock

LVAD Insertion (HeartMate 3)

End-stage HF, EF < 25%, refractory to medical therapy. Bridge to transplant or destination therapy. Often inotrope-dependent on arrival. Frequent comorbidities: renal dysfunction, pulmonary HTN, RV dysfunction.

5 concerns·1 mock

Off-Pump CABG (OPCAB)

Selected CAD patients — calcified aorta (avoid manipulation), elderly, renal dysfunction, recent stroke. Increasingly used. Surgeon-dependent.

5 concerns·1 mock

Pacemaker / ICD Generator Change

Battery depletion (5-10 yr life). HF with CRT/ICD. Prior MI. AF with VVI. Comorbidities significant in this population.

4 concerns·1 mock

Elective Cardioversion

AF/atrial flutter for rate/rhythm control. Patients have undergone AC therapy (3 wks) or TEE-guided. Often elderly, comorbidities, on beta-blockers or amiodarone.

4 concerns·1 mock

Thoracic

5 cases

Lobectomy, VATS, esophagectomy, mediastinoscopy

Neurosurgery

11 cases

Craniotomy, spine fusion, awake crani, aneurysm clipping

Supratentorial Craniotomy (tumor resection)

Usually 40–70, brain tumor (glioma, meningioma, mets). May have raised ICP, seizures, focal neuro deficit. Often on dexamethasone + AEDs (levetiracetam).

6 concerns·2 mock

Lumbar Spine Fusion (Posterior Instrumented)

Spinal stenosis, spondylolisthesis, herniated disc with failed conservative management. Typically 50-75. Comorbidities common (DM, CAD, smoker). Chronic pain + opioid tolerance frequent.

6 concerns·1 mock

Posterior Fossa Craniotomy (sitting or lateral)

Tumors of cerebellum, brainstem, CP angle (vestibular schwannoma); aneurysms; trigeminal neuralgia microvascular decompression. Age 30-70. May have cranial nerve deficits, hydrocephalus.

6 concerns·1 mock

Cerebral Aneurysm Clipping

Two populations: (1) ruptured (SAH) — emergent, often poor neuro grade, vasospasm risk; (2) unruptured — elective, often discovered incidentally. Mean age 50s. Female predominant. HTN + smoking + family history.

7 concerns·1 mock

Awake Craniotomy

Tumor (often glioma) or epileptic focus near eloquent cortex (motor, sensory, language). Patient must be able to cooperate during awake mapping — no severe anxiety, deafness, severe aphasia, or pediatric (rare). Pre-op neuropsych evaluation + extensive counseling.

7 concerns·1 mock

Transsphenoidal Pituitary Resection

Pituitary adenoma (functional: prolactin, GH/acromegaly, ACTH/Cushing's, TSH; non-functional: mass effect). Acromegaly = airway concerns. Cushing's = HTN, glucose, OSA. Apoplexy = emergency.

7 concerns·1 mock

ACDF (Anterior Cervical Discectomy + Fusion)

Cervical radiculopathy or myelopathy from disc herniation, spondylosis. 40s-70s. Often otherwise well; some with significant comorbidities. Myelopathy patients = fall risk, careful positioning.

7 concerns·1 mock

Deep Brain Stimulator Insertion

Parkinson's disease (most common), essential tremor, dystonia. 50s-70s. Patients often on dopamine agonists, levodopa, sometimes deprenyl (MAOI) — drug interactions.

5 concerns·1 mock

Ventriculoperitoneal Shunt (Pediatric)

Hydrocephalus: post-IVH preemie, congenital (aqueductal stenosis, Chiari II/myelomeningocele), tumor, post-meningitis. Infants → adolescents. Often emergent for raised ICP.

4 concerns·1 mock

Burr Hole / Subdural Hematoma Evacuation

Chronic subdural: elderly (60s-90s) with falls, on AC, often dementia. Acute subdural: trauma, often poor neuro grade. Epidural: lucid interval after head trauma.

4 concerns·1 mock

Endovascular Thrombectomy (Acute Ischemic Stroke)

LVO (large vessel occlusion) acute stroke within thrombectomy window (< 24 hr selected with imaging). NIHSS often ≥ 6. Elderly, AF, HTN, DM common. May be on tPA already.

6 concerns·1 mock

Orthopedic

6 cases

THA, TKA, ORIF hip, shoulder, scoliosis

OB / Gynecology

6 cases

Cesarean, labor epidural, D&C, hysterectomy

Cesarean Section (elective, term)

Term pregnant woman (37+ weeks), repeat C/S or breech or maternal request. Aspiration risk by definition. Possible PIH, GDM, obesity. Most awake under spinal.

6 concerns·2 mock

Emergent Cesarean Section ('crash C/S')

Acute fetal distress (Cat III tracing, prolonged decel, cord prolapse, placental abruption) requiring delivery within minutes. May or may not have epidural in place. Full stomach by definition. Clock starts ticking.

6 concerns·1 mock

Labor Epidural Placement

Term pregnant woman in active labor (4-7 cm typically). Wants pain relief. Most are healthy; some with PIH, GDM, BMI 40+, prior failed regional. May be cooperative or in extreme distress.

6 concerns·1 mock

Total Abdominal Hysterectomy (TAH-BSO)

Indications: fibroids, endometrial cancer, ovarian mass, pelvic pain. Age 40-70 typical. Often: anemic from chronic bleeding, possibly post-radiation, sometimes post-chemo for cancer.

6 concerns·1 mock

Cesarean — Preeclampsia / HELLP

Preeclampsia: BP ≥ 140/90 + proteinuria or end-organ dysfunction after 20 wk gestation. Severe features: SBP ≥ 160, DBP ≥ 110, plt < 100k, LFTs 2× upper, Cr > 1.1, pulmonary edema, headache, visual changes, RUQ pain. HELLP: hemolysis + elevated liver enzymes + low platelets.

7 concerns·1 mock

Postpartum Hemorrhage (Operative Management)

Active hemorrhage post-delivery — atony (#1 cause), retained products, lacerations, placenta accreta spectrum, coagulopathy. Often previously stable patient now exsanguinating. Sometimes already with neuraxial in place from labor/cesarean.

6 concerns·1 mock

Genitourinary

4 cases

TURP, prostatectomy, nephrectomy, lithotripsy

ENT

7 cases

Tonsillectomy, FESS, microlaryngoscopy, thyroidectomy

Total Thyroidectomy

Female > male 4:1, range 30-70. Indications: thyroid cancer, large goiter, hyperthyroidism (Graves) refractory to medical therapy. Patient should be euthyroid before surgery (or risk thyroid storm intraop).

6 concerns·1 mock

Microlaryngoscopy with Jet Ventilation

Vocal cord lesion (polyp, papilloma, dysplasia, early carcinoma), subglottic stenosis. Often: smoker, GERD, CAD. Shared airway with surgeon; high-stakes airway management.

6 concerns·1 mock

Awake Fiberoptic Intubation (anticipated difficult airway)

Anticipated difficult airway: anatomy (small mouth, large tongue, limited neck mobility, micrognathia), pathology (oral/laryngeal tumor, RA cervical spine, prior radiation, trauma), or unstable C-spine.

6 concerns·1 mock

FESS (Functional Endoscopic Sinus Surgery)

Chronic sinusitis refractory to medical therapy, nasal polyposis, mucocele. Often adult 30-60. Some have aspirin-exacerbated respiratory disease (Samter triad: asthma + polyps + ASA sensitivity).

6 concerns·1 mock

Laryngectomy + Radical Neck Dissection

Advanced laryngeal/hypopharyngeal cancer. 60s-70s, heavy smokers + drinkers, malnourished, often prior radiation. COPD + CAD + cirrhosis common. Often difficult airway preoperatively.

7 concerns·1 mock

Rigid Bronchoscopy / Foreign Body Removal

Pediatric: foreign body aspiration (peanut classic), often 1-3 yo, witnessed event vs incidentaloma. Adult: massive hemoptysis, central airway tumor, stent placement. Sometimes emergent.

5 concerns·1 mock

Tonsillectomy (Adult)

Adults: chronic tonsillitis, OSA from large tonsils, tumor. Higher complication rate than pediatric: more pain, more bleeding (delayed). OSA common.

5 concerns·1 mock

Ophthalmology

4 cases

Cataract, vitrectomy, oculoplastics

Plastics & Reconstructive

4 cases

Free flap, reduction mammoplasty, abdominoplasty

Trauma & Emergency

2 cases

Damage-control lap, splenectomy, ORIF

Pediatric

11 cases

T&A, PE tubes, hypospadias, pyloric stenosis, congenital cardiac

Tonsillectomy & Adenoidectomy (Pediatric)

Usually 3–10 years old. Recurrent tonsillitis or OSA. Often current/recent URI. Mask induction, IV after asleep. Outpatient unless OSA or comorbidity requires admission.

6 concerns·2 mock

Pyloromyotomy (Pyloric Stenosis)

Infant 3-12 weeks old, projectile non-bilious vomiting, dehydration. Hypochloremic, hypokalemic, metabolic alkalosis classic ('paradoxical aciduria' as a late finding). Surgery is NOT emergent — it's a metabolic emergency that needs correction first.

6 concerns·2 mock

Myringotomy & Tube Placement (Pediatric)

Toddlers and young children (1-5 yr), recurrent otitis media or chronic effusion. Usually otherwise healthy. Outpatient. Frequent runny nose/URI in this age group.

6 concerns·1 mock

Tetralogy of Fallot Repair (Infant)

Infant 3-12 months, cyanotic congenital heart disease. Four lesions: VSD, overriding aorta, pulmonary stenosis (RVOTO), RVH. Hypercyanotic 'tet spells' on history. Cardiology + surgery jointly managed.

6 concerns·1 mock

Necrotizing Enterocolitis Laparotomy (Neonatal)

Premature neonate (24-32 weeks gestation), VLBW (< 1500 g), in NICU. Septic, acidotic, coagulopathic. Often intubated already with chronic lung disease. Highest-acuity pediatric anesthetic.

6 concerns·1 mock

Hypospadias Repair (Pediatric)

Boys 6-18 months typically (can be older for staged repairs). Otherwise healthy. Hypospadias is congenital — abnormal urethral meatus location. Outpatient procedure.

6 concerns·1 mock

Tracheoesophageal Fistula Repair (Neonate)

Neonate, often premature, day 1-3 of life. VACTERL association (Vertebral, Anal, Cardiac, TE, Renal, Limb) common. May have other anomalies including cardiac (workup mandatory before OR).

6 concerns·1 mock

Congenital Diaphragmatic Hernia Repair

Neonate, day 1-7 of life. CDH = abdominal contents in chest → pulmonary hypoplasia + pulmonary HTN. Severity ranges from mild to lethal. Often on HFOV or ECMO before repair. Repair is delayed until physiology stable.

5 concerns·1 mock

MRI Under General Anesthesia (Pediatric)

Children too young (typically < 6) or unable to cooperate (developmental delay, autism, anxiety) for awake MRI. Some have OSA, syndromes, or cardiac comorbidities.

6 concerns·1 mock

Pediatric Dental Restoration Under GA

Children unable to tolerate awake dental work — young (< 5), severe caries (early childhood caries), special needs (autism, behavioral). Often have dental abscesses.

5 concerns·1 mock

Wilms Tumor Resection (Pediatric)

Toddler/young child (typical age 2-5). Abdominal mass, hematuria, HTN. May have post-chemo (vincristine, dactinomycin, doxorubicin — cardiotoxicity). Some with IVC tumor extension.

6 concerns·1 mock

Burn

1 case

Escharotomy, debridement, grafting

Transplant

4 cases

Kidney, liver, heart, lung