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ROTEM Coagulation Guide
Interpret rotational thromboelastometry (ROTEM) results and guide targeted coagulation therapy. Separate fibrinogen deficiency from platelet dysfunction for goal-directed hemostatic resuscitation.
Open ROTEM GuideTEG 6s Coagulation Guide
Interpret thromboelastography (TEG 6s) results and identify targeted coagulation therapy. Differentiate heparin effect from factor deficiency and guide goal-directed hemostatic management.
Open TEG 6s GuideQuantra Coagulation Guide
Interpret Quantra QPlus viscoelastic hemostatic assay results and guide coagulation therapy. Separate fibrinogen contribution (FCS) from platelet contribution (PCS) for targeted hemostatic resuscitation.
Open Quantra GuideFibrinogen Replacement Calculator
Calculate fibrinogen concentrate dose from viscoelastic test results (ROTEM FIBTEM, TEG CFF-MA, Quantra FCS). Includes weight-adjusted dosing, cryoprecipitate conversion, and clinical target profiles for perioperative hemorrhage.
Open Fibrinogen CalculatorDirect Oral Anticoagulant (DOAC) Perioperative Management
Determine when to stop and restart a direct oral anticoagulant (DOAC) around a procedure. Covers neuraxial, deep, and superficial regional techniques with renal function adjustment for dabigatran.
Open DOAC ManagementCHA₂DS₂-VASc Score
Estimate annual stroke risk in atrial fibrillation (AF) using the CHA₂DS₂-VASc score. Guide anticoagulation decisions and assess perioperative thromboembolism risk based on ESC 2020 guidelines.
Open CHA₂DS₂-VAScHAS-BLED Score
Assess bleeding risk in anticoagulated atrial fibrillation (AF) patients using the HAS-BLED score. Identify modifiable risk factors before starting or adjusting anticoagulation therapy.
Open HAS-BLEDCardiac Risk Assessment (RCRI)
Estimate perioperative cardiac risk before non-cardiac surgery using the Revised Cardiac Risk Index (RCRI). Stratify major adverse cardiac event (MACE) risk and guide the need for preoperative cardiology evaluation.
Calculate RCRIFunctional Capacity Assessment
Guided cardiac risk navigator for non-cardiac surgery. Integrates surgical risk, functional capacity, cardiac history, and biomarker (BNP/NT-proBNP) assessment using the ACC/AHA stepwise pathway.
Assess perioperative cardiac riskPostoperative Pulmonary Risk (ARISCAT)
Estimate risk of postoperative pulmonary complications (PPCs) using the ARISCAT score. Stratify patients into low, intermediate, and high risk before elective surgery to guide prehabilitation and monitoring.
Open ARISCATOxygenation Assessment
Evaluate preoperative oxygenation status from SpO₂ and PaO₂ against age-adjusted expected values. Determine whether oxygenation impairment warrants further workup or arterial blood gas (ABG) testing.
Open Oxygenation ToolArterial Blood Gas (ABG) Interpretation
Interpret arterial blood gas (ABG) results from a room-air sample before surgery. Identify ventilation patterns, acid-base compensation, and perioperative respiratory risk from PaCO₂, HCO₃⁻, and pH.
Open ABG ToolWells Score for Pulmonary Embolism (PE)
Calculate Wells Score for pulmonary embolism (PE). Estimate pretest probability and guide the decision between D-dimer testing and CT pulmonary angiography (CTPA).
Open Wells ScorePostoperative Nausea and Vomiting (PONV) Risk & Management
Calculate Apfel score for postoperative nausea and vomiting (PONV) risk. Stratify prophylaxis need and select multi-mechanism antiemetic agents based on risk category.
Open PONV ToolCURB-65 Pneumonia Severity
Estimate community-acquired pneumonia (CAP) severity using the CURB-65 score. Stratify 30-day mortality risk and guide disposition between outpatient, inpatient, and intensive care management.
Open CURB-65Difficult Airway Assessment
Estimate the likelihood of difficult laryngoscopy or intubation before induction. Evaluate five LEMON criteria and receive a risk level with airway strategy guidance.
Open Airway AssessmentDifficult Airway Assessment (LEMON)
Estimate the likelihood of difficult laryngoscopy or intubation before induction using the LEMON assessment. Evaluate five airway criteria and receive a risk level with pre-induction strategy guidance.
Open LEMON AssessmentAwake Intubation Decision
Support clinical decision-making for awake fiberoptic intubation (AFOI) when difficult airway risk may make induction unsafe. Evaluate intubation difficulty, ventilation rescue, obstruction, and consequences of failure.
Open Awake Intubation DecisionEmergency Airway Failure (CICV)
Recognize and respond to Cannot Intubate / Cannot Ventilate (CICV) — the most critical airway emergency. Review immediate action steps including emergency front-of-neck airway (eFONA) and prevention strategies.
Open Emergency Airway GuideSTOP-BANG Score
Screen for obstructive sleep apnea (OSA) risk using the STOP-BANG score. Stratify perioperative respiratory monitoring needs and guide postoperative disposition and opioid management.
Open STOP-BANGCategories
Browse tools by clinical domain.
Viscoelastic hemostatic assay-guided coagulation management. Interpret TEG and ROTEM results and guide targeted therapy.
Perioperative cardiac risk assessment and management. Evaluate risk before non-cardiac surgery using evidence-based indices.
Perioperative pulmonary risk evaluation. Identify patients at risk for postoperative pulmonary complications.
Perioperative airway assessment and management planning. Identify difficult airway risk before induction.
Clinical Reasoning
See how experienced clinicians think through complex perioperative decisions — the physiology, the evidence, and the logic behind each choice.
About Perioperative Guide
Perioperative Guide provides clinical decision support tools for perioperative care. Designed for busy clinicians who need reliable, evidence-based information quickly.