Sedation is a treatment plan, not a drip. Name the indication, treat pain and reversible distress first, write a target depth, choose the least physiologically disruptive drug, and reassess after every change. Most ventilated CICU patients should be interactive enough for a neurologic exam and liberation work unless a specific indication requires deeper sedation.
1

The 60-second sedation prescription

indication - target - stop rule
AFind the driver
Pain, hypoxemia, dyssynchrony, shock, urinary retention, withdrawal, delirium, fever, device alarm.
BWrite targets
Pain goal + RASS goal + reassessment interval. Default to light sedation unless contraindicated.
CMatch physiology
BP, HR, RV/LV function, bronchospasm, seizure risk, organ clearance, airway and aspiration risk.
DPlan liberation
Daily SAT/SBT eligibility, neurologic exam, wean sequence, rescue plan, and owner.
2

RASS: document the depth you intend

target, do not drift
+4 to +2Combative to agitated
Find cause now
+1Restless
Assess distress
0 to -2Alert to light sedation
Common target range
-3Moderate
Movement to voice, no eye contact
-4 to -5Deep to unarousable
Specific indication only
RASS is validated from +4 (combative) to -5 (unarousable). A score is not a neurologic diagnosis. paralysis makes clinical depth scoring impossible.
3

When deeper sedation may be justified

write the indication daily
IndicationPossible targetDaily question
Severe ARDS / NMBADeep analgesia + amnesia before paralysisCan synchrony be achieved without deep sedation or ongoing NMBA?
Refractory electrical stormDeep sympatholysis, often with airway controlHas rhythm control or definitive EP therapy allowed lightening?
Status epilepticus / ICPGoal tied to EEG or intracranial physiologyIs deep sedation still treating the monitored endpoint?
Dangerous dyssynchronyTemporary deeper target while mechanics are fixedTube, mode, trigger, flow, pain, auto-PEEP, acidosis corrected?
4

Universal pre-sedation pause

prepare to rescue one level deeper
  • Airway: position, suction, oxygen, BVM, adjuncts, intubation equipment.
  • Monitoring: ECG, BP cycling, SpO2 plus clinical ventilation observation and waveform capnography during moderate/deep procedural sedation unless precluded or invalidated by patient/procedure factors.
  • Access: working IV. know concentration and flush dead space.
  • People: designate a trained observer for monitoring during moderate/deep sedation, separate from the procedural task.
  • Rescue: pressor, fluids when appropriate, naloxone/flumazenil, defibrillator/pacing ready.
  • Time-out: indication, dose sequence, target, stop point, and recovery criteria.
Clinical-reference guardrail: follow institutional credentialing, medication concentrations, airway policy, and anesthesia consultation thresholds. The clinician must be able to rescue the patient from a deeper-than-intended state.
Analgesia-first does not mean opioid-first. Separate intensity, mechanism, cause and distress. Treat the cause, then layer nonpharmacologic and local/regional measures with mechanism-specific medication. Reserve the smallest effective opioid or ketamine rescue and reassess function, ventilation, circulation and delirium.
A

Measure, localize and phenotype

pain is a diagnostic signal
1Measure
Use patient-reported 0-10 NRS when possible. CPOT or BPS if unable to self-report. Vital signs are cues, not a pain scale.
2Describe
Location, quality, trigger, timing, exam, new ischemia or complication, and device/procedure contribution.
3Build
Cause control + positioning/local therapy + mechanism-specific nonopioid + proportional rescue.
4Reassess
Pain and cough/mobility plus RASS, RR/ETCO2, BP/HR, bowel function and delirium after each change.
B

Phenotype directs the bundle

do not treat every pain alike
PhenotypeCluesMultimodal pathCICU gate
Somatic / chest wallFocal, tender, worse with movement or cough. sternotomy, rib, woundPosition/splint, ice or heat. scheduled acetaminophen. topical/local or regional technique. short-acting opioid rescueCheck wound/bleeding. Regional plan must account for infection, coagulopathy and antithrombotic timing.
Visceral / ischemicDeep, pressure-like or poorly localized. dynamic ECG, perfusion or abdominal findingsDiagnose and treat source first - reperfusion or disease-specific therapy. acetaminophen. titrated opioid only for severe persistent painAnalgesia must not delay ECG, imaging, drainage or source control. opioid is not anti-ischemic therapy.
NeuropathicBurning, shooting, electric pain, allodynia, dermatomal or nerve distributionConservative start: gabapentin 100-300 mg enterally qHS or pregabalin 25-50 mg q12h. renal-adjust and titrate slowly. topical lidocaine if focalNot rapid rescue. Gabapentinoids add sedation and respiratory risk with opioids/benzodiazepines.
InflammatoryPleuritic, positional, pericardial or musculoskeletal featuresAcetaminophen. disease-specific NSAID/colchicine only when indicated. ice/heat and mobilization when appropriateDo not add NSAIDs routinely in ICU pain. screen AKI/low perfusion, GI bleeding and DAPT/anticoagulation.
Procedure / devicePredictable chest tube, line, dressing, pacing, sheath or repeated bedside carePreemptive explanation + positioning + local/field/regional anesthesia. small fentanyl or ketamine rescue when neededSedation/amnesia are separate. A hypnotic never substitutes for local anesthesia.
Air hunger / dyspneaUrge to breathe, panic, high drive or ventilator mismatch. may occur without focal painTreat hypoxemia, edema, bronchospasm, acidosis and ventilator mechanics. coaching. selected carefully titrated opioid for refractory air hungerOpioid may ease air hunger, not excessive work. Do not deepen a hypnotic to hide dangerous mechanics.
Tolerance / withdrawalVerified chronic opioid or MOUD, escalating need, autonomic or GI withdrawal featuresReconcile exposure. continue verified buprenorphine/methadone when feasible. treat withdrawal and acute pain separately. add multimodal therapy. pain/addiction/pharmacy helpAvoid abrupt discontinuation, automatic escalation and reflex reversal unless ventilation requires it.
C

Build complementary layers

one purpose per intervention
NonpharmacologicExplain and coach. position, splint, mobilize, restore sleep. use ice/heat, massage or music when appropriate.
AcetaminophenCommon adult start: 650 mg q6h or 1 g q8h. Count every route/product. IV label max is 4 g/day if ≥50 kg, or 75 mg/kg/day (up to 3.75 g) if <50 kg. Lower the ceiling for liver disease, alcohol use, malnutrition, frailty or severe hypovolemia.
Local / regional1% lidocaine = 10 mg/mL. label ceiling without epinephrine is 4.5 mg/kg (max 300 mg), usually lower in CICU physiology. Track every operator's dose. use trained regional service and LAST rescue.
Neuropathic agentsSchedule, renal-adjust and titrate over days. not PRN rescue. Hold/reduce for somnolence, hypoventilation or encephalopathy.
Ketamine adjunctPADIS postsurgical study regimen: 0.5 mg/kg IV once, then 1-2 mcg/kg/min (very-low-certainty evidence). Bolus may not fit ischemia, tachyarrhythmia or shock. use monitored, validated dosing guidance. See Drug Cards P.4.
Opioid rescueUse small sequential doses to the functional goal. allow onset before redosing. Add ventilation/sedation monitoring and a bowel/withdrawal plan.
Stop gates: new pain can signal ischemia, bleeding, compartment pressure, tamponade, device complication or infection. Do not stack opioid + benzodiazepine + gabapentinoid without a clear indication and enhanced monitoring. “Multimodal” means complementary mechanisms with fewer harms - not simply more drugs.
Do not treat ventilator distress with unconsciousness until you have treated the cause. Fix hypoxemia, tube/circuit problems, flow starvation, auto-PEEP, acidosis, fever and pain. Then use protocolized, goal-directed sedation with daily liberation planning.
A

First hour after intubation

never awake and paralyzed
0-5 min - bridge induction Confirm tube and ventilation, start analgesia, and order the maintenance sedative before the induction agent wears off.
5-15 min - set the goal Record pain score + RASS target. reassess BP/HR, synchrony, pupils/exam, temperature, glucose, bladder and lines.
15-60 min - titrate deliberately Use small changes and allow onset time. Bolus only when urgency justifies the hemodynamic and respiratory hit.
If NMBA was used Ensure continuous analgesia + amnesia while paralysis persists. do not infer comfort from immobility.
B

Choose the maintenance strategy

phenotype, not habit
NeedUsually favorsWhy / caution
Fast titration / deeper targetPropofol + opioidRapid on/off and anticonvulsant. hypotension, bradycardia, apnea, hypertriglyceridemia and PRIS surveillance.
Light, interactive, extubation-readyDexmedetomidine + analgesiaMinimal respiratory depression. bradycardia/hypotension. The 2025 PADIS update conditionally favors dex over propofol when light sedation and/or delirium reduction are highest priorities.
Pain-dominant distressFentanyl bolus, then lowest effective infusionAnalgesia-first. reassess before adding hypnotic. Watch apnea, ileus, tolerance and accumulation.
Seizure / alcohol-BZD withdrawalMidazolam when specifically indicatedUseful for amnesia and anticonvulsant effect. routine infusions accumulate and are associated with slower awakening/delirium burden.
Bronchospasm / opioid-sparingKetamine adjunctAnalgesic and bronchodilatory. secretions, emergence, tachycardia and possible hypotension in catechol-depleted shock.
C

The daily liberation loop

SAT + SBT + mobility
Morning targetPain assessment, RASS, CAM-ICU/ICDSC, mobility level, SAT/SBT eligibility and neurologic-exam need.
SATReduce/hold sedatives per protocol when no active seizure, paralysis, dangerous agitation, ischemia or other exclusion.
SBTCoordinate awakening with breathing trial. treat pain and anxiety without recreating coma.
If SAT failsName the reason, treat it, restart at a lower dose when possible, and set the next attempt.
DeliriumRestore orientation, sleep cues, hearing/vision and mobility. Screen only when arousable. PADIS 2025 could not recommend for or against antipsychotics as delirium treatment.
Do not chase RASSWhen agitation is caused by hypoxemia, shock, withdrawal, urinary retention, pain or ventilator mechanics.
Evidence nuance: dexmedetomidine and propofol are both reasonable light-sedation agents. MENDS2 found no significant difference in days alive without delirium/coma between dex and propofol in ventilated adults with sepsis. A2B (2025) did not find faster successful extubation with dex or clonidine versus propofol. Both alpha-2 strategies increased severe bradycardia. Choose by physiology.
D

Ventilator dyssynchrony: sedative or mechanics?

diagnose before deepening
PatternLook forFirst moves
Flow starvationScooped pressure trace, high driveIncrease inspiratory flow, change flow pattern/mode, treat acidosis/pain.
Double triggeringNeural Ti longer than machine TiAdjust Ti/cycling or pressure support. treat high drive. accept deeper sedation only if unsafe volumes persist.
Ineffective triggerAuto-PEEP, weak effort, over-assistanceLengthen expiratory time, reduce support, optimize trigger, bronchodilate/suction.
Titrate to effect, not to the top of a range. The doses below are practical adult starting ranges, not substitute orders. Verify concentration, current labeling, and pharmacy guidance. several ICU adjunct uses are off-label. Reduce and slow in older/frail patients, shock, low cardiac output, organ dysfunction, sleep apnea, obesity hypoventilation and when combining agents.
A

Core agents

start low - wait - reassess
AgentPractical adult rangeBest useMain hazards / monitoring
Fentanyl25-50 mcg IV slowly. repeat after effect
25-200 mcg/h infusion
Rapid analgesia. procedures. vent pain. less histamine releaseApnea, rigidity with large/rapid dose, bradycardia, ileus, tolerance. Synergistic respiratory depression with benzodiazepines.
Midazolam0.5-1 mg IV over ≥2 min. reassess ≥2 min
1-5 mg/h infusion
Anxiolysis/amnesia. seizure. alcohol/BZD withdrawal. selected proceduresNo analgesia. Apnea/hypotension, delirium and accumulation. reduce with opioids, age/frailty, hepatic/renal dysfunction.
PropofolProcedure 0.25-0.5 mg/kg or 10-20 mg steps
Vent 5-50 mcg/kg/min
Fast deepening/lightening. seizure suppression. frequent exam. brief painful procedures with separate analgesiaNo analgesia. Hypotension, bradycardia, apnea. Monitor triglycerides and PRIS. Strict asepsis and product-specific tubing/discard intervals are essential.
Dexmedetomidine0.2-0.7 mcg/kg/h
Avoid loading in most CICU patients
Light cooperative sedation, extubation bridge, delirium-prone patientBradycardia, sinus arrest, hypotension. hypertension with loading. Not reliable for deep hypnosis or paralysis. Reduce in hepatic dysfunction. ICU label limits infusion to 24 h. Longer courses are off-label and need withdrawal surveillance.
KetamineAnalgesia 0.1-0.3 mg/kg IV
Dissociation 1 mg/kg IV, titrate
Off-label adjunct 0.05-0.3 mg/kg/h
Painful procedure, bronchospasm, opioid-sparing. dissociation when physiology favorsSecretions, nausea, emergence, nystagmus. HR/BP rise. apnea if rapid. Catechol-depleted shock can still become hypotensive.
EtomidateProcedure 0.1-0.15 mg/kg IV
RSI 0.2-0.3 mg/kg IV
Single, very brief hypnosis when hemodynamic stability mattersNo analgesia. Myoclonus, injection pain, apnea. adrenal suppression. Single bolus only - never maintenance infusion.
B

What each drug does not provide

close the missing domain
Hypnosis is not analgesiaPropofol, midazolam and etomidate lack analgesia. Dexmedetomidine has opioid-sparing effects but is insufficient alone for painful procedures.
Analgesia is not amnesiaFentanyl may leave recall. Add appropriate hypnotic/anxiolytic when the procedure requires amnesia.
Immobility is not comfortNeuromuscular blockade provides neither analgesia nor amnesia. Sedate first and continuously.
C

Combination discipline

the interaction is the dose
CombinationBenefitBedside rule
Fentanyl + midazolamAnalgesia + anxiolysis/amnesiaGive sequentially, in small doses, with full reassessment between. combination markedly increases apnea and hypotension risk.
Fentanyl + propofolPain control + rapid hypnosisReduce both doses. propofol bolus is the common hemodynamic pivot.
Ketamine + propofolAnalgesia + hypnosis. may reduce dose of eachStill requires full deep-sedation airway rescue. ketamine does not guarantee spontaneous ventilation.
Dex + opioidInteractive sedation + analgesiaWatch bradycardia and respiratory depression from the opioid. dex itself does not treat pain reliably.
Never stack before onset. Most avoidable events follow rapid redosing because the first dose was not given time to work. If the patient is too unstable to wait for titration, use an airway-ready deep-sedation plan or proceed with the lifesaving intervention.
Procedural sedation is a continuum. A patient intended for moderate sedation can enter deep sedation or general anesthesia. Preoxygenate, monitor ventilation, assign roles, and be ready to support an airway and blood pressure before the first dose.
A

Before the medication

six-point time-out
1Procedure
Pain, duration, immobility and intended depth.
2Patient
Airway/OSA, aspiration, allergies, prior anesthesia, organ function.
3Physiology
BP/HR, shock, preload, LV/RV, bronchospasm, ICP.
4Roles
Operator, medication clinician, monitor, airway rescue.
5Equipment
ECG/BP/SpO2/ETCO2, oxygen, suction, BVM, airway kit.
6Recovery
Monitoring, return to baseline, disposition and documentation.
!Local anesthesia
Use lidocaine/field block whenever the procedure permits.
!Stop point
If airway or hemodynamics worsen, stop drug and rescue first.
B

Synchronized cardioversion

sedate if feasible - never delay rescue shock
Unstable from the rhythm: prepare for immediate synchronized cardioversion. Sedate whenever feasible, but if delay is dangerous, shock first. If synchronization cannot be achieved and the condition is critical, use an unsynchronized high-energy shock per ACLS.
PathExample startBest fit / caution
Etomidate0.1-0.15 mg/kg IV
repeat 0.05 mg/kg if needed
Very brief hypnosis with relatively stable BP. no analgesia, myoclonus and adrenal suppression. Airway-ready deep sedation.
Propofol0.5 mg/kg IV or 10-20 mg stepsFast onset/recovery in a stable patient. reduce dose and avoid large bolus in shock, severe AS, RV failure or preload dependence.
Fentanyl + midazolamFentanyl 25-50 mcg, wait. then midazolam 0.5-1 mg, waitSlower titration with less predictable recovery. Ensure adequate hypnosis before the painful shock when feasible. Synergistic apnea/hypotension requires airway-ready monitoring.
Ketamine0.5-1 mg/kg IV, titrateDissociative option with analgesia. avoid reflexive use in ischemia/electrical storm or severe tachycardia. Airway events remain possible.
Pad placement, rhythm-specific energy, anticoagulation and re-synchronization: Tachyarrhythmia & Temporary Pacing P.1 and Atrial Fibrillation P.6.
C

Other CICU procedures

match pain + immobility
ProcedureFoundationSedation options / caveats
Transcutaneous pacingImmediate pacing + confirm mechanical captureFentanyl with small midazolam doses or ketamine if physiology fits. do not delay pacing in unstable high-grade block.
Arterial / central linePositioning + generous local anestheticOften no systemic sedation or only cautious anxiolysis. Deep sedation adds risk without improving local anesthesia.
Chest tube / drainField block along skin, tract and pleuraFentanyl plus titrated hypnotic, or ketamine. Sedation never substitutes for pleural/local anesthesia.
TEE / bronchoscopyTopical anesthesia + secretion/aspiration planModerate/deep sedation by credentialed team. consider anesthesia for difficult airway, severe OSA, tenuous shock or prolonged intervention.
Bedside wound / reductionLocal/regional block when possibleKetamine, propofol, or fentanyl/midazolam chosen by depth and physiology. continuous ventilation monitoring.
D

Recovery is part of the procedure

do not walk away after the shock
The induction drug does not fix peri-intubation shock. Optimize oxygenation and circulation, have a vasopressor strategy, dose for the patient's physiology, and start post-intubation analgesia/sedation before awareness returns.
A

RSI sequence for the CICU

the hemodynamic airway
Prepare Expert help, airway plan A/B/C, suction, waveform capnography, defibrillator, difficult-airway equipment, drug labels and post-intubation orders.
Preoxygenate + position Head-elevated when possible. NIV preoxygenation reduces peri-intubation hypoxemia versus an oxygen mask in eligible critically ill adults (PREOXI). Anticipate aspiration risk and intolerance.
Resuscitate Identify RV/LV failure, tamponade, auto-PEEP, vasoplegia and hypovolemia. Start/ready norepinephrine rather than relying on a sedative choice.
Induce + paralyze Give induction agent, then NMBA without delay. Confirm tube with sustained waveform ETCO2.
Immediately after Analgesia + sedative infusion/bolus, ventilator targets, BP/pressor, glucose/temperature, CXR/ultrasound as indicated.
B

Induction agent by phenotype

no drug is shock-proof
AgentAdult RSI startFavorsAvoid / anticipate
Etomidate0.2-0.3 mg/kg IVSevere LV dysfunction, tenuous BP, very brief inductionMyoclonus, adrenal suppression, no analgesia. Still prepare for post-intubation hypotension.
Ketamine1-2 mg/kg IV
dose-reduce in profound shock
Bronchospasm, pain, selected hypotensive patientsTachycardia/ischemia, secretions. direct myocardial depression may appear when catecholamine-depleted.
Propofol0.5-1 mg/kg IV
reduced-dose range for vulnerable physiology
Hypertension, seizure, stable circulationMarked vasodilation/myocardial depression. generally avoid a full bolus in shock, severe RV failure or preload dependence.
MidazolamNot preferred for routine RSISpecific seizure/withdrawal context when other agents unsuitableSlower, less predictable induction and hypotension. accumulated pre-intubation doses complicate awakening.
C

Post-intubation: the forgotten medication emergency

before induction wears off

Analgesia

Fentanyl 25-50 mcg IV and repeat to effect, then intermittent dosing or infusion if ongoing pain. Address tube, lines, procedure and chest discomfort.

Hypnosis

Maintain adequate hypnosis immediately after induction, especially during residual paralysis. Dexmedetomidine alone is not a dependable bridge for deep amnesia. Lighten after blockade resolves and the indication permits.

Target

Write RASS and pain goals. Deeper only for an indication. If paralyzed, use pre-NMBA depth and physiologic/EEG context because RASS cannot be measured.

Ventilator

Set PBW-based tidal volume, appropriate PEEP/FiO2, flow and expiratory time. Sedation cannot repair auto-PEEP or flow starvation.
D

Predict the post-intubation crash

treat before it happens
MechanismCluePrevention / response
Loss of sympathetic toneShock masked by agitation/catecholaminesPressor running/ready. smaller induction dose. immediate BP cycling or arterial trace.
Loss of preloadRV failure, tamponade, hypovolemia, high PEEPOptimize phenotype. lowest effective mean airway pressure. urgent disease-specific treatment.
Dynamic hyperinflationAsthma/COPD, high RR, breath stackingLow RR, high flow, long expiration. disconnect briefly for extreme auto-PEEP with collapse.
RSI trial (2025): among 2,365 critically ill adults, ketamine did not lower 28-day in-hospital mortality versus etomidate (28.1% vs 29.1%). Cardiovascular collapse during intubation was more frequent with ketamine (22.1% vs 17.0%). Neither agent replaces resuscitation.
The same dose can be gentle in one patient and catastrophic in another. Use the hemodynamic phenotype, needed depth, expected duration and need for neurologic examination to choose the agent.
A

Phenotype-to-agent map

first choice is a reasoning frame
Phenotype / goalOften usefulAvoid reflexively / bedside nuance
Cardiogenic shock / low EFFentanyl in small steps. etomidate for one brief deep event. pressor-supported maintenance planLarge propofol bolus or dex loading. Any sedative can unmask shock. correct perfusion rather than accepting coma.
RV failure / pulmonary HTNMinimal effective dose. etomidate for brief hypnosis. preserve oxygenation, ventilation and SVRHypotension, hypercapnia, hypoxemia, acidosis and excessive PEEP. Ketamine is not automatically safe if tachycardic/ischemic.
Electrical stormDeep propofol and/or benzodiazepine-based sympatholysis with airway control. beta-blockade and definitive EP pathwayUndertreated pain/anxiety and sympathomimetic escalation. Sedation is an adjunct and bridge to rhythm stabilization and definitive treatment.
Post-arrest / seizurePropofol for rapid titration and seizure suppression. benzodiazepine for seizure. EEG-guided depthDo not confuse drug effect with neurologic prognosis. Reassess after clearance and temperature control.
BronchospasmKetamine for induction/analgesic adjunct. propofol if BP permitsRapid ketamine can still cause apnea. manage secretions and ventilator expiratory time.
Delirium / weaningDexmedetomidine when light, interactive sedation is desiredRoutine benzodiazepine escalation. dex may worsen bradycardia or shock.
Neuro exam neededShort-acting propofol or dex with explicit wake-up planLong benzodiazepine infusion and repeated stacking that obscures serial examination.
B

Organ function and patient factors

dose and interval change

Older / frail

Use smaller initial doses, longer waits and less combination therapy. Loss of airway tone and BP can be disproportionate.

Renal dysfunction

Active midazolam metabolites accumulate in renal dysfunction. Opioid clearance varies by drug and exposure. Use clinical wake-up, not the clock, to judge recovery.

Hepatic dysfunction

Reduce midazolam and dexmedetomidine. expect prolonged effect. Encephalopathy is not a reason to ignore pain.

OSA / obesity hypoventilation

Position, preoxygenate, capnography and airway rescue are central. Reduce opioid/benzodiazepine stacking.

Chronic opioid/BZD exposure

Expect tolerance and withdrawal. Reconcile home exposure and build a taper. avoid abrupt reversal unless ventilation demands it.

Pregnancy

Urgency and maternal physiology govern. involve anesthesia/OB for elective deep sedation and agent-specific risk review.
C

When to involve anesthesia early

risk is more than ASA class
  • Known or predicted difficult airway. prior failed sedation or anesthesia complication.
  • Severe OSA/obesity hypoventilation, high aspiration risk, inability to lie flat.
  • Severe aortic stenosis, pulmonary hypertension/RV failure, tamponade or escalating shock.
  • Need for deep sedation without a secured airway, prolonged TEE/bronchoscopy or painful intervention.
  • Repeated sedation failure, unusual tolerance, complex withdrawal, or need for general anesthesia.
  • Procedure location lacks full monitoring, airway rescue or recovery staffing.
D

Do not use a sedative to hide deterioration

reassess the diagnosis
New agitationHypoxemia, low output, stroke, withdrawal, pain, urinary retention, hypoglycemia, sepsis.
New dyssynchronyTube/circuit, pneumothorax, auto-PEEP, edema, secretions, mode/trigger mismatch.
New hypotensionDrug effect may be the clue, not the full diagnosis: bleeding, tamponade, RV failure, sepsis, ischemia.
Practical default: use the least drug that achieves a written goal, but do not undertreat pain, air hunger or a genuinely dangerous indication for deep sedation. Comfort and liberation are simultaneous goals.
Rescue the physiology, not the number. For hypoventilation, open and ventilate the airway. do not wait for SpO2 to fall. For hypotension, stop/slow the drug while treating the hemodynamic phenotype. Reversal agents are adjuncts, not substitutes for BVM ventilation and circulation support.
A

Immediate rescue sequence

call - stop - oxygenate - ventilate - support
1Call for help
Stop procedure and sedatives. note last drug/dose/time.
2Airway
Position, jaw thrust, suction, oral/nasal adjunct as appropriate.
3Ventilate
100% O2, BVM with ETCO2. intubate if rescue fails or risk persists.
4Circulation
BP, rhythm, pulse. fluids if responsive, pressor, atropine/pacing as phenotype requires.
B

Reversal agents

titrate to ventilation, then watch
AgentAdult bedside startUse and cautions
Naloxone0.1-0.2 mg IV q2-3 min to ventilationReverse opioid respiratory depression while preserving needed analgesia when possible. Larger doses may precipitate pain, hypertension, pulmonary edema or acute withdrawal. Opioid duration may exceed naloxone - repeat or infuse and monitor for resedation.
Flumazenil0.2 mg IV over 15 sec. wait 45 sec, then repeat 0.2 mg q60 sec to 1 mgSelected iatrogenic benzodiazepine oversedation. Avoid in chronic BZD dependence or proconvulsant/mixed overdose. Contraindicated when BZD is controlling a life-threatening condition such as status epilepticus, or in serious cyclic-antidepressant poisoning. Can cause seizures/withdrawal. resedation is common enough to require continued observation.
C

Agent-specific stop signs

recognize before collapse
ExposureStop signAction
PropofolUnexplained metabolic/lactic acidosis, rhabdomyolysis/CK rise, hyperkalemia, lipemia, AKI, Brugada-like ECG or cardiac collapseStop propofol immediately. supportive care, alternate sedation, consider RRT/ECMO for refractory PRIS.
DexmedetomidineNew severe bradycardia, sinus pause or hypotensionStop/slow. remove vagal stimulus. atropine/pressor/pacing as required. Avoid loading dose in tenuous CICU physiology.
KetamineApnea/laryngospasm, severe hypertension/tachycardia, distressing emergence, secretion burdenAirway maneuvers/BVM. stop/reduce. suction. treat physiology rather than assuming dissociation protects airway.
Midazolam/opioidSlowing respirations, rising ETCO2 with hypoventilation, or loss of waveform with apnea/obstruction. Also hypotension and delayed awakeningStop drugs, ventilate/support, selective reversal, and continue observation for recurrence.
EtomidateMyoclonus, apnea, persistent hypotension or repeated-dose temptationSupport airway. reassess diagnosis/volume/pressor. Do not continue as an infusion.
D

Monitoring calendar

close the loop
FrequencyWhat to document
After every bolus/changeRASS/depth, pain, RR/ETCO2, SpO2, BP/HR, airway support and effect before redosing.
At least each shiftIndication, target, actual depth, delirium screen, cumulative exposure, organ function and line/tube necessity.
DailySAT/SBT eligibility, neurologic exam need, mobility, sleep, bowel regimen, withdrawal risk and taper plan.
Propofol ongoingTrend triglycerides using a validated monitoring plan. check CK/lactate/acid-base and ECG when high-dose/prolonged exposure or PRIS concern.
Ventilation and oxygenation are different safety signals The sequence highlights ventilation slowing, an oxygen saturation that can remain reassuring on supplemental oxygen, and immediate airway assessment and ventilation support. It is a qualitative teaching schematic, not a patient tracing or timed physiologic model. 1 · Ventilation slows or stopsWatch effort, rate and capnogram 2 · SpO₂ may stay reassuringSupplemental oxygen can delay desaturation 3 · Assess airway and ventilateDo not wait for SpO₂ to fall
Oxygen is not ventilation. A disappearing capnogram can reflect apnea, obstruction, disconnection or sampling failure. Check the patient and circuit immediately. ETCO₂ can also fall with low pulmonary blood flow. Original qualitative schematic.