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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High-YieldICU / Wards🆕 2025 Update

ICU Sedation, Delirium & Sleep

The 2025 SCCM Focused Update to the PADIS (Pain, Anxiety, Agitation/Sedation, Delirium, Immobility, Sleep) Guidelines updates the landmark 2018 guidelines with new evidence on sedation selection, melatonin, enhanced mobilization, and anxiety management. Bottom line: dexmedetomidine over propofol when targeting light sedation, melatonin for sleep, and enhanced mobilization/rehabilitation are now formally recommended.

🔍 Overview

What Is PADIS?

Pain • Anxiety/Agitation • Delirium • Immobility • Sleep Disruption, the five domains of ICU suffering that drive morbidity, mortality, and post-ICU syndrome.

2025 SCCM Focused Update vs 2018 PADIS, At a Glance

CHANGED Dexmedetomidine suggested over propofol when light sedation (RASS 0 to −2) or delirium reduction are priorities. 2018: no preference between the two non-benzodiazepine agents; both considered equivalent. Why it matters: a resident asked about sedation choice should now lead with dex when these goals apply, not "either is fine."
NEW 2025 Melatonin suggested for ICU patients (3–5 mg PO at bedtime). May improve sleep quality and reduce delirium incidence. 2018: no recommendation; melatonin was off-label and informal. Now guideline-supported.
EXPANDED Enhanced mobilization/rehabilitation over usual care, including in-bed cycling, early initiation, twice-daily sessions, protocol-driven approaches, or extended duration. 2018: early mobilization recommended in general terms; 2025 specifies what "enhanced" means and asks for an intensification beyond baseline ICU PT.
NEW 2025 Anxiety added as a sixth domain. No specific intervention strongly recommended yet; emphasis on assessment and acknowledgment as a distinct ICU stressor. 2018 PADIS = Pain, Agitation/Sedation, Delirium, Immobility, Sleep only. The acronym is sometimes now written PADIS-A.
CLARIFIED Antipsychotics for delirium: unable to make a recommendation for or against (insufficient evidence for benefit on duration, LOS, or mortality). 2018: weak conditional against routine use for prevention; 2025 reframes the treatment evidence gap explicitly. Clinical bottom line is unchanged: do not use antipsychotics to "treat" delirium, only for safety-threatening agitation.
UNCHANGED Avoid benzodiazepines for routine ICU sedation (worsen delirium); analgesia-first approach (treat pain before escalating sedation); ABCDEF bundle; RASS, CAM-ICU/ICDSC, CPOT/BPS as screening tools; non-pharmacologic prevention as first-line for delirium.
UNCHANGED All 2025 recommendations remain conditional with low-certainty evidence; individualize to each patient.

The ABCDEF Bundle

The ICU Liberation ABCDEF Bundle operationalizes PADIS at the bedside. Each element should be assessed daily:

Letter	Element	Action
A	Assess/prevent/manage pain	CPOT or BPS q4h. Analgesia-first approach.
B	Both SAT + SBT	Daily sedation awakening trial + spontaneous breathing trial.
C	Choice of sedation	Dexmedetomidine or propofol. Avoid benzos. Target RASS 0 to −2.
D	Delirium assess/prevent/manage	CAM-ICU or ICDSC q8-12h. Non-pharmacologic prevention first.
E	Early mobilization	PT/OT within 48h of ICU admission when safe.
F	Family engagement	Open visitation, shared decision-making, emotional support.

Key Scales

Domain	Tool	Target
Pain	CPOT (Critical-Care Pain Observation Tool) or BPS	CPOT < 3, BPS < 5
Sedation	RASS (Richmond Agitation-Sedation Scale)	RASS 0 to −2 (light sedation)
Delirium	CAM-ICU or ICDSC	CAM-ICU negative
Anxiety	No validated ICU-specific tool yet (2025 gap)	Assess clinically; consider nonpharmacologic interventions

💤 Sedation

2025 Sedation Recommendations

Key Change: PADIS, 2025, Dexmedetomidine is now suggested over propofol for sedation in mechanically ventilated adults where light sedation (RASS 0 to −2) and/or delirium reduction are highest priorities.

Recommendation	2025 Status	vs 2018	Clinical Notes
Dexmedetomidine over propofol when light sedation or delirium reduction are priorities	Suggested Conditional, low certainty	CHANGED 2018: no preference between dex and propofol	Dexmedetomidine may reduce delirium incidence and improve time at target RASS. Higher risk of bradycardia and hypotension. NOT appropriate for deep sedation (RASS −4/−5) or patients needing NMBAs, dex cannot achieve that depth.
Propofol remains appropriate for rapid on/off sedation or deep sedation	Niche preserved Not displaced, just not preferred when light sedation is the goal	UNCHANGED Still first-line when deep sedation or fast neuro-check turnaround is needed	Faster wake-up for neuro checks and SAT/SBT. Monitor triglycerides q48h, hypertriglyceridemia is dose-related. Propofol infusion syndrome (PRIS) risk if > 80 mcg/kg/min for > 48h, watch for unexplained metabolic acidosis, rhabdo, bradycardia.
Avoid benzodiazepines for routine ICU sedation	Avoid (routine) Conditional	UNCHANGED 2018 already against routine use	Associated with increased delirium (OR ~2–3x), longer MV duration, longer ICU stay, worse cognitive outcomes. Reserve for alcohol withdrawal (CIWA-guided), seizures, or benzodiazepine-dependent patients.
Analgesia-first approach	Recommended Conditional	UNCHANGED 2018 core principle, carried forward	Treat pain before escalating sedation. Fentanyl infusion as first-line. Many patients labeled "agitated" are actually in untreated pain, sedation alone treats the wrong problem.

When to Choose What

Clinical Scenario	Preferred Agent	Rationale
Light sedation target (RASS 0 to −2)	Dexmedetomidine	Less delirium, preserves respiratory drive, cooperative sedation
Deep sedation needed (NMBAs, proning)	Propofol ± fentanyl	Titratable, rapid on/off. Dex inadequate for RASS −4/−5
Neuro checks needed frequently	Propofol	Fastest wake-up time for neurological assessment
Hemodynamically unstable / bradycardia risk	Propofol or fentanyl	Dex causes bradycardia and hypotension; avoid in shock
Alcohol withdrawal / seizure risk	Benzodiazepine (CIWA-guided)	Only appropriate indication for benzo ICU sedation
Post-extubation agitation / anxiety	Dexmedetomidine low-dose	Preserves airway reflexes; anxiolytic without respiratory depression

Daily Sedation Awakening Trial (SAT)

Protocol: Hold sedation each morning → assess RASS → if patient tolerates (RASS −1 to +1 without distress) → proceed to SBT. If agitation/distress → restart at 50% previous dose and titrate. ABC Trial, 2008: paired SAT + SBT reduced ventilator days by 3.1 days and 1-year mortality by 14%.

🧠 Delirium

Delirium: 2025 Update

2025 Key Finding: The PADIS task force was unable to recommend for or against antipsychotics for ICU delirium. Current evidence shows minimal or no effect on ICU/hospital length of stay. Focus on non-pharmacologic prevention first.

CAM-ICU Screening (Assess q8-12h)

Feature	Assessment	Positive If
1. Acute onset / fluctuating course	Change from baseline OR fluctuating mental status in past 24h?	Yes
2. Inattention	Squeeze my hand when I say "A", S-A-V-E-A-H-A-A-R-T	< 8/10 correct (errors > 2)
3. Altered consciousness	RASS score at time of assessment	RASS ≠ 0 (any score other than alert/calm)
4. Disorganized thinking	"Will a stone float on water?" "Are there fish in the sea?" + command	< 4/5 correct

CAM-ICU positive = Feature 1 + Feature 2 + (Feature 3 OR Feature 4). Sensitivity ~80%, specificity ~96%.

Prevention (Non-Pharmacologic), First-Line

Reorientation, clock, calendar, whiteboard with date/names/plan
Sleep hygiene, lights off at night, minimize nighttime vitals/labs, ear plugs, eye masks
Early mobilization, PT/OT within 48h, dangle/chair/walk when safe
Minimize deliriogenic meds, avoid benzos, anticholinergics, opioid excess
Correct sensory deficits, glasses, hearing aids at bedside
Family presence, familiar voices reduce agitation and disorientation
Music therapy, familiar music may reduce anxiety and agitation
Melatonin, now formally suggested PADIS, 2025

Pharmacologic Management

Drug	Dose	Evidence	2025 vs 2018
Haloperidol (Haldol)	0.5–2 mg IV/IM q4-6h PRN	HOPE-ICU, 2013 and MIND-USA, 2018: no benefit on delirium duration, coma-free days, or mortality. AID-ICU, 2022 reinforced no mortality benefit.	CLARIFIED 2025: no recommendation for or against. 2018: weak conditional against routine use for prevention. Clinical bottom line unchanged, only for safety-threatening agitation, not as a delirium "treatment."
Quetiapine (Seroquel)	25–200 mg PO BID	Limited evidence, may reduce delirium duration in small trials. Preferred when haldol contraindicated (Parkinson's, Lewy body dementia).	CLARIFIED 2025: no recommendation for or against, same as 2018. Use only when antipsychotic is genuinely needed.
Dexmedetomidine	0.2–1.5 mcg/kg/hr IV	MENDS, 2007: more delirium-free and coma-free days vs lorazepam. SEDCOM, 2009: less delirium (54% vs 76.6%) and shorter time to extubation vs midazolam. DahLIA, 2016: faster resolution of agitated delirium.	ELEVATED 2025: suggested over propofol when light sedation or delirium reduction prioritized. 2018: dex and propofol considered equivalent.
Melatonin	3–5 mg PO at bedtime	Low-risk intervention. May improve sleep quality and reduce delirium incidence. Note: not FDA-regulated, brand-to-brand variability in bioavailability.	NEW 2025 2018: no recommendation, off-label use only. Now formally suggested.

Avoid: Benzodiazepines for delirium treatment (worsen delirium). Physical restraints should be minimized, they increase agitation and prolong delirium. QTc monitoring required for all antipsychotics.

🏃 Mobility & Sleep

Enhanced Mobilization (2025 Recommendation)

New: PADIS, 2025, Enhanced mobilization/rehabilitation is suggested over usual care. Enhancements include cycling, early initiation, twice-daily sessions, protocol-driven approaches, or extended duration.

Mobilization Levels

Level	Activity	When
0	Passive ROM in bed	Hemodynamically unstable, on NMBAs, high FiO₂
1	Active-assisted ROM in bed, bed exercises	On vasopressors but stable, mechanical ventilation
2	Sitting on edge of bed (dangle)	RASS ≥ −2, FiO₂ ≤ 0.6, vasopressors weaning
3	Standing, transfer to chair	Cooperative, stable vitals, able to follow commands
4	Ambulation (with or without assist)	Off vasopressors, tolerating lower vent support or extubated

Safety Screen Before Mobilization

MAP < 60 or > 110, or new/escalating vasopressors
Active cardiac ischemia or unstable arrhythmia
SpO₂ < 88% on current settings
Active seizures, raised ICP, or unstable spine
Active hemorrhage or unsecured airway
Patient refusal or extreme distress

Sleep Disruption

New: PADIS, 2025, Melatonin is now suggested for ICU patients. Low-risk intervention that may improve sleep quality and reduce delirium. Note: not FDA-regulated, so quality may vary between brands.

ICU Sleep Bundle

Environmental: Dim lights 10 PM–6 AM, minimize alarms, cluster care to allow 4h uninterrupted sleep
Pharmacologic: Melatonin 3–5 mg PO at 9 PM. Avoid benzos and zolpidem (worsen delirium)
Ventilator: Optimize settings to minimize discomfort/dyssynchrony at night
Sensory: Offer ear plugs and eye masks (shown to improve sleep quality in RCTs)
Minimize nocturnal interruptions: Avoid routine 2 AM vitals/labs unless clinically indicated

💊 Medications

ICU Sedation & Analgesia Dosing

Drug	Dose	Onset	Key Points
Fentanyl (Sublimaze)	25–200 mcg/hr IV infusion	1–2 min	First-line analgesia. Less hypotension than morphine. Accumulates in renal/hepatic failure.
Dexmedetomidine (Precedex)	0.2–1.5 mcg/kg/hr IV	5–10 min	PADIS 2025 preferred for light sedation. Bradycardia risk. No respiratory depression. Anxiolytic.
Propofol (Diprivan)	5–50 mcg/kg/min IV	30–60 sec	Fastest wake-up. Monitor TGs q48h. Propofol infusion syndrome (PRIS) risk if > 80 mcg/kg/min > 48h. Best for neuro checks.
Midazolam (Versed)	0.02–0.1 mg/kg/hr IV	2–3 min	Avoid for routine sedation (↑ delirium). Reserve for alcohol withdrawal/seizures. Accumulates.
Ketamine	0.1–0.5 mg/kg/hr IV	1–2 min	Opioid-sparing analgesic. Useful in refractory pain or bronchospasm. Emergence reactions.
Melatonin	3–5 mg PO at bedtime	30–60 min	PADIS 2025 new recommendation. Sleep promotion. May reduce delirium. Not FDA-regulated.
Haloperidol (Haldol)	0.5–2 mg IV/IM q4-6h PRN	10–20 min	No PADIS recommendation for delirium. QTc monitoring. Risk of EPS. Use only for acute safety threats.

Hypersalivation / Sialorrhea

Common in the ICU from ketamine infusions, clozapine, bulbar dysfunction (stroke, ALS, post-extubation weakness), or simply an inability to clear pooled oropharyngeal secretions. Listed most common to least common.

Drug	Dose	Key Points
Glycopyrrolate (Robinul)	0.1–0.2 mg IV q4–6h PRN, or 1–2 mg PO/NG TID	First-line in ICU. Does not cross the blood-brain barrier, so no delirium risk (unlike IV atropine or scopolamine). Workhorse for ketamine infusions, clozapine drooling, and post-extubation secretions.
Atropine 1% ophthalmic drops	1–2 drops sublingual q4–6h	Off-label but cheap and effective. Minimal systemic absorption. Useful when the patient cannot swallow pills.
Scopolamine patch (Transderm Scōp)	1.5 mg transdermal q72h	Convenient sustained effect but 6–12 h to onset. Avoid in elderly or already delirious patients (CNS anticholinergic effects).
Hyoscyamine (Levsin)	0.125 mg SL q4h PRN	Alternative when glycopyrrolate is unavailable.
Ipratropium	500 mcg nebulized q6h, or SL	Reserve for refractory cases or when other routes are limited.
Botulinum toxin (parotid / submandibular injection)	Ultrasound-guided by ENT or neurology	Chronic or refractory sialorrhea only (bulbar ALS, Parkinson, cerebral palsy). Effect lasts ~3 months.

Address the cause: Ketamine infusion: glycopyrrolate premedication is standard. Clozapine: dose reduction or scheduled glycopyrrolate (do not abruptly stop clozapine). Organophosphate toxicity: atropine plus pralidoxime (different problem). Bulbar / neuro: glycopyrrolate plus Yankauer suction, head of bed up, swallow evaluation.

Watch for anticholinergic load: urinary retention, ileus, tachycardia, delirium, dry eyes. Stack carefully if the patient is already on other anticholinergics.

📋 On Rounds

Pimp Questions

What sedation agent does PADIS 2025 suggest over propofol, and when?

Dexmedetomidine is suggested over propofol when light sedation (RASS 0 to −2) and/or delirium reduction are the highest priorities. It reduces delirium incidence but carries higher risk of bradycardia. NOT appropriate for deep sedation or hemodynamic instability.

Does PADIS 2025 recommend antipsychotics for ICU delirium?

No. The task force was unable to issue a recommendation for or against antipsychotics for delirium treatment. MIND-USA, 2018 and other trials show minimal or no effect on ICU/hospital LOS. Focus on non-pharmacologic prevention: reorientation, sleep hygiene, early mobilization, minimizing deliriogenic meds.

What is the ABCDEF bundle and why does it matter?

A = Assess/prevent/manage pain, B = Both SAT + SBT daily, C = Choice of sedation (dex or propofol, avoid benzos), D = Delirium assess/prevent/manage, E = Early mobilization, F = Family engagement. Operationalizes PADIS guidelines at the bedside. Bundle compliance associated with lower mortality, less delirium, and shorter ICU stays.

When is propofol preferred over dexmedetomidine?

When deep sedation is required (RASS −4/−5 for NMBAs or proning), when frequent neuro checks need rapid wake-up, or when the patient has hemodynamic instability or bradycardia risk. Dex cannot achieve deep sedation and may worsen hypotension/bradycardia.

What does PADIS 2025 say about melatonin in the ICU?

Melatonin is now conditionally suggested for ICU patients (3–5 mg PO at bedtime). It is a low-risk intervention that may improve sleep quality and reduce delirium incidence. Caveat: melatonin is not FDA-regulated, so quality and bioavailability may vary between brands. Optimal dosing is still being studied.

Why should you avoid benzodiazepines for routine ICU sedation?

Benzodiazepines are independently associated with increased delirium (OR ~2–3x), longer duration of mechanical ventilation, longer ICU stay, and worse cognitive outcomes. PADIS, 2018 recommended non-benzodiazepine sedation. The only appropriate ICU indications are alcohol withdrawal (CIWA-guided), active seizures, and benzodiazepine-dependent patients.

What enhanced mobilization strategies does PADIS 2025 suggest?

Enhanced mobilization includes: in-bed cycling, early initiation (within 48h), twice-daily sessions, protocol-driven approaches, or extended duration of mobility. Schweickert, 2009: early PT/OT improved functional independence and reduced delirium duration. Goal is to mitigate ICU-acquired weakness and its long-term impact on survival and quality of life.

Daily ICU Sedation Checklist

RASS score, Current? At target (0 to −2)?
Pain assessment, CPOT/BPS. Analgesia adequate before sedation adjustment?
CAM-ICU, Delirium screen this shift?
SAT eligibility, Can we hold sedation today?
SBT eligibility, If SAT passed, ready for breathing trial?
Mobilization, What level today? PT/OT ordered?
Sleep, Melatonin ordered? Nighttime interruptions minimized?
Deliriogenic meds, Can we stop benzos, anticholinergics, unnecessary opioids?
Family, Visitation plan? Family meeting needed?

📋 Sample Presentation

"Mrs. Chen is on ICU day 3, intubated for ARDS. Sedation: dexmedetomidine at 0.8 mcg/kg/hr with fentanyl 75 mcg/hr. RASS is −1, at our target. CAM-ICU was negative this morning. We did a SAT, she tolerated the sedation hold and proceeded to an SBT, which she passed. Plan is to extubate today. PT had her dangling yesterday. Melatonin 3 mg at bedtime. No benzodiazepines. Family has been at bedside with open visitation."