When to intubate in GCS?

GCS ≤ 8 requires intubation for airway protection. The patient cannot protect their own airway at this level of consciousness. Motor score is the most prognostically important component.

What is the best initial fluid for sepsis resuscitation?

Lactated Ringer's (LR) is the preferred resuscitation fluid. The SMART trial (2018) showed balanced crystalloids reduced death, new renal failure, and persistent renal dysfunction compared to normal saline.

When to start vasopressors in septic shock?

Start norepinephrine (first-line vasopressor) if MAP remains < 65 mmHg after initial 30 mL/kg crystalloid resuscitation, or earlier if patient is profoundly hypotensive. Do not delay pressors to complete full fluid resuscitation.

Why can serum uric acid be normal during acute gout?

During acute inflammation, IL-6 increases renal urate excretion and redistributes urate from plasma to tissues. Up to 40% of acute gout flares have normal serum uric acid. Joint aspiration with polarized microscopy is needed for definitive diagnosis.

How do you distinguish lupus flare from infection in SLE?

Key clues: CRP is low/normal in flare but elevated in infection. Complement (C3/C4) drops in flare but is normal/elevated in infection. Procalcitonin is elevated in bacterial infection but normal in flare. Anti-dsDNA rises in flare, stable in infection.

What is the difference between DKA and HHS?

DKA features acidosis (pH 600), hyperosmolality (> 320), and minimal ketosis -typically in Type 2 DM. DKA requires insulin drip; HHS requires aggressive fluid resuscitation first.

When to give tPA in acute ischemic stroke?

IV alteplase (tPA) can be given within 4.5 hours of last known well time in eligible patients. CT head must rule out hemorrhage first. For large vessel occlusion, mechanical thrombectomy can be performed up to 24 hours with favorable imaging.

What antibiotics for community-acquired pneumonia?

Inpatient non-ICU: ceftriaxone + azithromycin. ICU: ceftriaxone + azithromycin (add vancomycin if MRSA risk). Outpatient healthy: amoxicillin. Outpatient with comorbidities: augmentin + azithromycin or respiratory fluoroquinolone. Duration: 5 days if clinically stable for 48 hours.

How to interpret iron studies?

Iron deficiency: low ferritin (< 30), high TIBC, low iron, low transferrin saturation (< 20%). Anemia of chronic disease: normal/high ferritin (acute phase reactant), low TIBC, low iron. A ferritin of 50-100 in an inflamed patient may still represent iron deficiency.

What is the correction rate for hyponatremia?

Correct sodium no more than 8 mEq/L in 24 hours to avoid osmotic demyelination syndrome (ODS). For symptomatic severe hyponatremia with seizures, give 3% hypertonic saline 100-150 mL bolus over 10-20 minutes. If overcorrected, use D5W + DDAVP rescue protocol.

When to start antibiotics in meningitis?

Within 30-60 minutes. Do NOT delay antibiotics for LP or CT. Draw blood cultures, start empiric antibiotics (vancomycin + ceftriaxone ± ampicillin if > 50 or immunocompromised), then perform LP when possible. Dexamethasone should be given before or with the first antibiotic dose.

DOACs vs warfarin in antiphospholipid syndrome?

DOACs are contraindicated in APS. The TRAPS trial (2018) showed rivaroxaban was inferior to warfarin with more thrombotic events in triple-positive APS patients. Warfarin with INR target 2-3 is the standard for APS, indefinitely.

How to manage scleroderma renal crisis?

ACE inhibitors (captopril) are life-saving -start immediately and titrate aggressively. Do NOT hold for rising creatinine. Steroids > 15 mg prednisone per day precipitate scleroderma renal crisis. ARBs are NOT a substitute -evidence is only for ACEi.

What are the 4 pillars of heart failure treatment?

Guideline-directed medical therapy (GDMT) for HFrEF: (1) ARNI or ACEi/ARB, (2) beta-blocker (carvedilol, metoprolol succinate, or bisoprolol), (3) MRA (spironolactone or eplerenone), (4) SGLT2 inhibitor (dapagliflozin or empagliflozin). All four should be initiated and titrated to target doses.

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URGENTGI/Surgery

Gallstone Pancreatitis

Gallstones cause ~40% of acute pancreatitis. Stone impacts at ampulla of Vater → blocked pancreatic duct → autodigestion. Key difference from alcoholic pancreatitis: gallstone pancreatitis needs CHOLECYSTECTOMY during the same admission. ALT > 150 has ~85% PPV for gallstone etiology.

🔍 Overview

Epidemiology & Pathophysiology

Gallstones cause ~40% of acute pancreatitis (alcohol ~40%, other ~20%)
Stone impacts at ampulla of Vater → blocked pancreatic duct → premature activation of pancreatic enzymes → autodigestion
Key difference from alcoholic pancreatitis: gallstone pancreatitis needs CHOLECYSTECTOMY

Diagnosis

Lipase > 3× ULN -most sensitive and specific single test
ALT > 150 U/L has ~85% PPV for gallstone etiology -very helpful clue!
RUQ ultrasound showing gallstones ± CBD dilation
Clinical: epigastric/RUQ pain radiating to back, nausea/vomiting

🚨 Management

Initial Management (Same as All Pancreatitis)

Goal-directed IV LR -NOT aggressive fluids. WATERFALL, 2022 showed aggressive fluids ↑ fluid overload without benefit.
Pain control -hydromorphone/morphine, ondansetron for nausea
Early feeding -low-fat solid diet as tolerated. No need to wait for lipase to normalize.
NO prophylactic antibiotics

Cholecystectomy Timing

Severity	Timing	Rationale
Mild pancreatitis	Same admission (ideally within 72h)	Delaying to outpatient → 25–30% recurrence rate. PONCHO, 2015 showed same-admission chole is safe and reduces recurrence.
Severe/necrotizing	Delay 4–6 weeks	Operating during severe pancreatitis = higher complication rate. Wait for inflammation to resolve.

ERCP Indications

Only if concurrent cholangitis (fever + jaundice + RUQ pain = Charcot triad)
OR persistent CBD obstruction (elevated bilirubin not improving)
Routine ERCP for all gallstone pancreatitis is NOT recommended -APEC, 2024

Do NOT discharge gallstone pancreatitis without cholecystectomy or a plan for same-admission cholecystectomy. Recurrence rate is 25–30% if you send them home with gallbladder in situ. PONCHO, 2015 showed same-admission cholecystectomy is safe and reduces recurrence.

Updated Practice - Old teaching: get ERCP for all gallstone pancreatitis. WRONG -ERCP is only indicated if there is concurrent cholangitis (Charcot triad) or persistent bile duct obstruction. Routine ERCP in resolving gallstone pancreatitis does not improve outcomes.

BISAP Score (predict severity at admission): BUN > 25, Impaired mental status, SIRS, Age > 60, Pleural effusion. Score >= 3 = predicted severe pancreatitis. Simple, fast bedside tool. Use within 24h of admission to guide ICU triage and resource planning.

When to get CT: Do NOT get CT at presentation (too early for necrosis). CT is indicated at 72-96h IF: (1) no clinical improvement, (2) worsening despite treatment, (3) suspected local complication (necrosis, pseudocyst, abscess). Contrast-enhanced CT is the gold standard for detecting pancreatic necrosis (>= 30% non-enhancement = necrotizing pancreatitis). ACR, 2019

Early feeding is safe: Start low-fat solid diet within 24h as tolerated. No need to wait for pain resolution or lipase normalization. Clear liquid progression is unnecessary - go straight to low-fat solids. Early feeding reduces hospital stay and infectious complications. If unable to eat after 72h, start enteral nutrition (nasogastric or nasojejunal tube). TPN only as last resort. Bakker et al. (PYTHON), 2014

Rectal indomethacin for post-ERCP pancreatitis: When ERCP IS indicated (cholangitis, persistent obstruction), give indomethacin 100 mg PR immediately before or after the procedure. Reduces post-ERCP pancreatitis from ~17% to ~9% in high-risk patients. Now standard of care at all major centers. Elmunzer et al. (NEJM), 2012

🧪 Workup

Test	Purpose / Key Values
Lipase	> 3× ULN diagnostic. Don't need to normalize before feeding/surgery.
ALT	> 150 U/L = ~85% PPV for gallstone etiology -very helpful!
Total/direct bilirubin	Elevated = stone may still be impacted. Improving = stone likely passed.
Alk phos	Elevated in biliary obstruction
CBC	Leukocytosis (inflammation), hemoconcentration (dehydration)
BMP	Cr (organ failure), glucose, calcium
CRP at 48h	Severity marker. CRP > 150 at 48h suggests severe pancreatitis.
RUQ ultrasound	Gallstones, CBD dilation (> 6 mm suggests obstruction)
MRCP	If diagnostic uncertainty -avoids invasive ERCP. Better for CBD stone detection.
CT abdomen/pelvis	Only if not improving by day 3–5 (assess for necrosis, complications)

💊 Medications

Drug	Dose	Notes
Lactated Ringer's	Goal-directed (not aggressive)	WATERFALL 2022: aggressive fluids ↑ overload, no benefit
Hydromorphone (Dilaudid)	0.5–1 mg IV q3–4h PRN	Pain control. Morphine is also acceptable.
Ondansetron (Zofran)	4 mg IV q6h PRN	Nausea/vomiting
NO prophylactic antibiotics	-	Antibiotics only if infected necrosis or cholangitis confirmed

📋 On Rounds

Pimp Questions

When should you get an ERCP in gallstone pancreatitis?

Only two indications: (1) Concurrent cholangitis -Charcot triad (fever + jaundice + RUQ pain). ERCP for biliary decompression. (2) Persistent CBD obstruction -bilirubin not improving, CBD remains dilated. Routine ERCP for all gallstone pancreatitis is NOT recommended. APEC, 2024 showed no benefit of early routine ERCP.

What is the significance of ALT > 150 in pancreatitis?

ALT > 150 U/L has ~85% positive predictive value for gallstone etiology. This is one of the most useful lab clues to distinguish gallstone pancreatitis from alcoholic pancreatitis. It reflects transient biliary obstruction causing hepatocyte injury. A normal ALT does not rule out gallstones, but a markedly elevated ALT strongly supports it. Always get a RUQ ultrasound to confirm.

Same-admission vs delayed cholecystectomy -what does the evidence say?

PONCHO, 2015 showed same-admission cholecystectomy (within 72h) for mild gallstone pancreatitis reduced gallstone-related complications from 17% to 5%. The recurrence rate if you discharge without chole is 25–30%. For severe/necrotizing pancreatitis, delay 4–6 weeks (operating in acute severe inflammation ↑ complications).

Why not routine ERCP for gallstone pancreatitis?

Most gallstones that cause pancreatitis pass spontaneously -the stone transiently impacts the ampulla then dislodges. By the time you do ERCP, the stone is often already gone. APEC, 2024 confirmed that routine ERCP in gallstone pancreatitis (without cholangitis) does not improve outcomes and exposes patients to ERCP risks (post-ERCP pancreatitis 3–5%, bleeding, perforation). Reserve ERCP for cholangitis or persistent obstruction.

How do you distinguish gallstone pancreatitis from alcoholic pancreatitis?

Key differentiators: (1) ALT > 150 U/L has ~85% PPV for gallstone etiology. (2) RUQ ultrasound showing gallstones or CBD dilation. (3) History - gallstone pancreatitis often in females, obese, age 40+. Alcoholic pancreatitis in chronic drinkers with recurrent episodes. (4) Gallstone pancreatitis typically has more abrupt onset with biliary-pattern pain (RUQ radiating to back). (5) LFTs: gallstone pancreatitis often shows obstructive pattern (elevated ALP, GGT, direct bili).

What fluid resuscitation strategy is recommended for acute pancreatitis?

Goal-directed moderate IV fluid resuscitation with lactated Ringer's. The WATERFALL trial (2022) showed aggressive fluids (3 mL/kg/hr) increased fluid overload without improving outcomes vs moderate fluids (1.5 mL/kg/hr). Current recommendation: initial bolus of 1.5 mL/kg then maintenance at 1.5 mL/kg/hr, titrated to clinical targets (UOP >= 0.5 mL/kg/hr, HR < 120, MAP > 65). LR preferred over NS (less hyperchloremic acidosis). WATERFALL, 2022

What is the Revised Atlanta Classification for acute pancreatitis severity?

Three severity categories: (1) Mild - no organ failure, no local complications (80% of cases, mortality < 1%). (2) Moderately severe - transient organ failure (< 48h) OR local complications (peripancreatic fluid collection, pseudocyst, walled-off necrosis). (3) Severe - persistent organ failure > 48h (cardiovascular, pulmonary, or renal). Severity determines ICU need, feeding strategy, and cholecystectomy timing. BISAP and APACHE II scores predict severity at admission.

When should you start feeding in acute pancreatitis?

Early oral feeding (within 24h) as tolerated with a low-fat solid diet. Old teaching was NPO until pain resolves and lipase normalizes - this is WRONG. Multiple RCTs show early feeding reduces hospital stay and complications without increasing pain recurrence. No need to wait for lipase normalization. Start with low-fat solid diet (not clear liquids first). If unable to tolerate PO after 72h, consider nasogastric or nasojejunal tube feeding (NOT TPN). Li et al., 2013

What are the indications for antibiotics in acute pancreatitis?

Prophylactic antibiotics are NOT recommended for acute pancreatitis - even in severe/necrotizing disease. The only indications for antibiotics: (1) Confirmed or strongly suspected infected pancreatic necrosis (fever, rising WBC, gas on CT, positive FNA culture). (2) Concurrent cholangitis. (3) Extrapancreatic infections (pneumonia, UTI, line sepsis). For infected necrosis: carbapenems (meropenem 1g IV q8h) have the best pancreatic tissue penetration. AGA Guidelines, 2018

Clinical Examples

📋 Case 1, Mild Gallstone Pancreatitis

Patient: 48F with sudden epigastric pain radiating to back after fatty meal. Lipase 3200, ALT 280, T. bili 2.8, CBD 7 mm on RUQ US with gallstones. HR 92, BP 128/78. No fever.

Key findings: Gallstone pancreatitis (ALT > 150 = ~85% PPV for gallstone etiology). No cholangitis (afebrile, no Charcot triad). Mild disease, no organ failure.

Management:

Goal-directed LR at 1.5 mL/kg/hr × 24h (aggressive hydration within first 24h is key)
Pain control: hydromorphone 0.5 mg IV q3h PRN (no evidence morphine causes sphincter of Oddi spasm)
Early feeding: low-fat solid diet as tolerated (no need to wait for lipase to normalize or pain to resolve)
No ERCP, bilirubin trending down, stone likely passed. No cholangitis. APEC, 2024
Same-admission cholecystectomy within 72h PONCHO, 2015

Teaching point: Old teaching: NPO until pain-free and lipase normalizes. New evidence: early oral feeding is safe and reduces LOS. Don't delay feeding waiting for lab improvement.

📋 Case 2, Severe Necrotizing Pancreatitis

Patient: 55M heavy drinker. Lipase 8400, Cr 2.1, lactate 3.8, HR 118, BP 88/52. CT (72h): > 50% pancreatic necrosis with peripancreatic fluid collections. CRP 340 at 48h.

Key findings: Severe pancreatitis (organ failure + necrosis). BISAP ≥ 3. Alcoholic etiology. High risk for infected necrosis (30-40% of necrotizing pancreatitis).

Management:

ICU admission, aggressive IVF resuscitation (LR), vasopressors if refractory
No prophylactic antibiotics (no mortality benefit in sterile necrosis)
If infected necrosis suspected (gas in collection, clinical deterioration): CT-guided FNA → carbapenems if confirmed
Step-up approach for infected necrosis: percutaneous drain first → if fails, minimally invasive necrosectomy PANTER, 2010
Delay cholecystectomy 4-6 weeks if gallstone etiology (operating in severe inflammation ↑ complications)

Teaching point: The step-up approach (drain → endoscopic/minimally invasive necrosectomy → open surgery) has replaced open necrosectomy as standard of care. ~35% of patients improve with drainage alone.

📋 Case 3, Gallstone Pancreatitis with Cholangitis

Patient: 62F with epigastric pain, lipase 1800, T. bili 6.4 (rising), fever 39.1°C, rigors. WBC 18K. RUQ US: CBD 12 mm, gallstones, no intrahepatic dilation.

Key findings: Charcot triad (fever + jaundice + RUQ pain) = cholangitis. This is the one indication for urgent ERCP in gallstone pancreatitis. Rising bilirubin with fever = impacted stone with biliary sepsis.

Management:

Blood cultures × 2, start piperacillin-tazobactam 4.5g IV q6h (cover GN rods + enterococcus)
Urgent ERCP within 24h for biliary decompression (stone extraction + sphincterotomy)
IVF resuscitation, correct coagulopathy before procedure
If ERCP fails or unavailable: percutaneous transhepatic biliary drain (PTBD)
Same-admission cholecystectomy after cholangitis resolves (prevent recurrence)

Teaching point: Cholangitis is the ONLY absolute indication for ERCP in gallstone pancreatitis. Without cholangitis, most stones pass spontaneously and ERCP adds risk without benefit.

📣 Sample Presentation

One-Liner

"Ms. Garcia is a 45-year-old woman with BMI 34, presenting with epigastric pain radiating to the back, lipase 2800, ALT 320, bilirubin 3.2, RUQ US showing gallstones and CBD 8 mm -gallstone pancreatitis."

Key Points to Cover on Rounds

Gallstone pancreatitis (ALT 320 -high PPV for gallstone etiology). Goal-directed LR. Pain controlled with hydromorphone. Tolerating low-fat diet. Bilirubin trending down (3.2 → 2.1) -stone likely passed, no ERCP needed. No cholangitis. Surgery consulted -plan for same-admission laparoscopic cholecystectomy tomorrow (within 72h of admission per PONCHO). No prophylactic antibiotics. CRP at 48h: 80 (mild disease).

Monitoring

Parameter	Frequency	Target / Action
Lipase	Trending (not daily)	Don't need to normalize before feeding or surgery
LFTs (bilirubin, ALT)	Daily	Improving bilirubin = stone likely passed. Persistently elevated → ERCP.
BMP	Daily	Cr (organ failure), calcium (severity marker)
CRP at 48h	Once at 48h	> 150 = likely severe pancreatitis
CT abdomen	Only if not improving day 3–5	Assess for necrosis, pseudocyst, fluid collections
Surgical consult	Early (same admission)	Cholecystectomy timing -don't discharge without a plan

⚡ Summary

Etiology

Gallstones ~40% of pancreatitis. ALT > 150 = ~85% PPV for gallstones.

Initial Rx

Goal-directed LR (not aggressive per WATERFALL). Pain control. Early feeding. No prophylactic abx.

Cholecystectomy

Same admission for mild (PONCHO). Delay 4-6 wk for severe. 25-30% recurrence if discharged without.

ERCP

Only for cholangitis or persistent obstruction. NOT routine (APEC 2024).

Key Trials

PONCHO 2015 (same-admission chole), WATERFALL 2022 (no aggressive fluids), APEC 2024 (no routine ERCP).

Monitoring

LFTs daily (improving bili = stone passed). CRP 48h. CT only if not improving day 3-5.