Evidence-based decision support for emergency physicians and intensivists — fast, free, and built to cut cognitive load when it matters most.
Knowledge, like love, is a unique wealth that expands through distribution; its highest virtue is realized when directed toward those who require its guidance the most.
Each tool does one job and does it at speed. No logins, no clutter, no waiting. Mapped to current UK guidance and ready the moment a decision can't wait.
Nothing matches. Try “gas”, “stroke”, “sepsis”, “QTc”…
RCUK 2025 algorithms: ALS, BLS, PALS, NLS, anaphylaxis.
Current RCUK 2025 resuscitation guidelines for adult, paediatric and newborn patients, plus RCUK 2021 anaphylaxis. Algorithms and reference documents: ALS, BLS, PALS, NLS, peri-arrest arrhythmias, traumatic cardiac arrest, post-resuscitation care, neuroprognostication and anaphylaxis.
Seven-step RSI checklist, drug and infusion calculator, vent settings.
Rapid sequence intubation checklist, drug calculator, difficult airway scoring, post-intubation ventilator settings, and an infusion and vasopressor mL/h calculator.
ABG, VBG and CBG interpretation with teaching notes and photo import.
Comprehensive arterial, venous and capillary blood gas interpretation. Step-by-step analysis with teaching notes, acute vs chronic compensation, ARDS grading, ventilator calculations, O₂ delivery, Stewart approach, and serial trend tracking. Photo import with AI extraction. UK and US units.
NICE sepsis risk assessment: NEWS2 bands for adults, NICE criteria for children and pregnancy.
Sepsis risk assessment built on NICE NG253 (16 and over, graded by NEWS2), NG254 (under 16s) and NG255 (pregnant or recently pregnant). Timed actions for each risk level, fluid calculator and antibiotic guidance.
Imaging by time of onset, NIHSS, reperfusion windows and a 3D arterial map.
The clock, the score and the scan. Which imaging to request from time of onset, NIHSS and pre-stroke mRS, and which reperfusion treatments are still open, worked through against the 2023 UK and Ireland guideline, including the wake-up and extended windows. Alongside it, an interactive 3D model of the cerebral arterial tree with circle-of-Willis collateral flow, the territory each vessel supplies, and the syndromes that follow. An illustration for teaching, not a prediction of infarct.
Wells, PERC, YEARS and imaging in one progressive pathway.
Pulmonary embolism decision pathway. Wells score, PERC rule, YEARS algorithm and imaging guidance in one workflow.
CT head and C-spine criteria, bleeding reversal, silver trauma, spinal injury, strangulation.
Decisions made at the bedside under time pressure. The NICE NG232 imaging criteria for CT head and cervical spine, worked as a pathway for adults and under-16s, including the point where NG232 contradicts itself on amnesia. Bleeding and anticoagulation reversal, decided by the bleed rather than the number, with the PCC dose calculated from the INR. Silver trauma, spinal injury (NG41), penetrating neck and non-fatal strangulation.
Twelve stages from pre-alert to debrief, with a hyperthermic toxidrome differentiator.
Twelve stages from the pre-alert to the debrief, on the principle that the disturbance is a physiological sign and not a diagnosis. The non-negotiable four observations, red flags for hyperthermic ABD, the organic differential, de-escalation, graded rapid tranquillisation through to ketamine, post-sedation monitoring, and which legal framework to name in the notes. Includes an interactive differentiator for the six hyperthermic and movement toxidromes.
Red flags by presenting complaint, with disposition guidance.
Emergency complaint categories with the red flags that sit under each. Searchable by specialty with disposition guidance. NHS, NICE, RCEM, BTS and RCP guidelines.
Swallowed, inhaled, ENT and soft-tissue foreign bodies, in adults and children.
Foreign bodies across four routes — swallowed, inhaled, in the nose or ear, and retained in soft tissue — in adults and children. Six questions give the investigation, the action, whether the patient can be discharged and against which criteria, the follow-up owed, and a printable advice leaflet. NHS England button battery alert, NatPSA and RCEM on magnets, BSG/BSPGHAN for food bolus, RCUK choking.
Rash recognition and escalation, written for brown and black skin as well as white.
Rashes across four urgency bands, from the ones that kill to the ones that only need an explanation. Every entry describes how the condition looks on light skin and on brown and black skin side by side, because erythema is the sign most dermatology teaching depends on and the one that is least visible on darker skin. Clinical photographs, each used whole and credited, with the Fitzpatrick type and whether it was stated by the source or estimated. Red flags, mimics, ED actions, disposition and safety-netting on every entry, plus SCORTEN, LRINEC, RegiSCAR, Nikolsky and the 7-point checklist. A recognition and escalation aid, not a diagnostic tool.
The patient arrives with a device nobody has handled before.
Thirty-four implanted and indwelling devices: tracheostomy, laryngectomy, pacemaker and ICD, LVAD, shunts, stomas, dialysis access, lines and pumps. What it is, what goes wrong with it, what you do in the first ten minutes, and who to call.
Validated UK scores: HEART, NEWS2, NIHSS, CURB-65, eGFR, QTc and more.
Validated UK scoring tools across the common presenting complaints: HEART, Wells PE/DVT, CURB-65, GCS, FOUR, NEWS2, qSOFA, SOFA, ROSIER, NIHSS, DECAF, Alvarado, eGFR (3 methods), QTc, AKI staging, CHA₂DS₂-VASc, plus toxicology calculators and the paracetamol nomogram.
Weight-based emergency dosing, APLS weight, WETFLAG, tube sizing.
Weight-based emergency drug dosing for children. APLS weight estimation, WETFLAG reference, age-appropriate physiological normals, and emergency drugs across cardiac arrest, seizures, sedation, bronchodilators, intubation, fluids and inotropes.
Sodium correction, DKA protocol, hyperkalaemia, fluid choice.
Sodium correction rates, DKA fluid protocol, hyperkalaemia management and IV fluid choice guide with haemodynamic context.
Lund and Browder TBSA by age, Parkland fluids with hourly rates.
Interactive Lund and Browder body diagram for accurate TBSA% estimation, age-adjusted for adult, child and infant. Parkland formula fluid resuscitation with hourly rates and urine output targets.
Textbook-depth monographs on ED drugs and antidotes, SmPC-verified.
Textbook-depth articles on the drugs you actually reach for: the pharmacology behind them, the evidence under them, and the places they catch people out. Every dose checked against the current SmPC, with RCUK 2025 dosing and off-label use flagged explicitly. Includes the antidotes and chelators.
Organism-to-antibiotic and antibiotic-to-spectrum lookup with EUCAST data.
Organism-to-antibiotic and antibiotic-to-spectrum lookup. First-line and alternative agents, EUCAST susceptibility data, resistance notes, BNF dose links, molecular structures and microscopic organism images. Covers the pathogens and antibiotics you meet in the ED, including antifungals and antivirals.
Mechanism-first poisoning monographs with latent-phase timelines and antidotes.
A poison is a drug whose kinetics have escaped its pharmacology. Mechanism-first monographs on the overdoses that come through the door: what the metabolite does, why that organ, why the patient looks well while the damage is already underway, and what each antidote is actually answering. Every mechanistic claim carries an evidence badge.
39 step-by-step procedure guides mapped to the RCEM DOPS list.
Step-by-step emergency procedure guides mapped to the RCEM curriculum DOPS list: chest drains, airway, vascular access, fracture and joint reductions, procedural sedation and more. Indications, contraindications, kit lists, technique, pitfalls and aftercare.
Region-by-region fracture navigator for adults and children.
Region-by-region ED fracture management navigator. Assessment checklists, red flags, decision pathways and disposition guidance for adult and paediatric fractures, synthesised from BOAST, NICE, RCEM and BSSH guidance.
35 eponymous grading systems with diagrams, by body system.
The eponymous grading systems you reach for on shift: Stanford and DeBakey dissection, Salter-Harris, Weber, Bamford stroke syndromes, Killip, and more. Schematic diagrams, grade tables and management pointers, organised by body system.
Patient leaflets and return precautions for common ED presentations.
Structured safety-netting advice for common ED presentations. Return precautions, red-flag symptoms and clear discharge instructions aligned with RCEM guidance, plus a library of NHS patient leaflets.
Fitness to drive for Group 1 and 2 licences, reviewed against DVLA Nov 2025.
DVLA medical standards for Group 1 and Group 2 licences. Conditions, notification requirements and fitness-to-drive guidance across cardiology, neurology, diabetes, psychiatry and more.
NICE-aligned milestones and red flags by age band, 0 to 5+ years.
NICE-aligned developmental milestones and red flags by age band (0 to 5+ years). Gross motor, fine motor, speech and social domains with NG127/NG62/CG128 referral thresholds. Sex-specific walking milestones.
Study design, bias and statistics, with appraisal calculators and worked papers.
A full critical appraisal and evidence-based medicine curriculum for emergency clinicians. Twenty-three chapters covering descriptive statistics, choosing a statistical test, study design, bias, confounding, intention-to-treat, confidence intervals, NNT, diagnostic accuracy and likelihood ratios, ROC curves, Bayesian inference, meta-analysis and GRADE. Six working calculators (2x2 diagnostic accuracy, pre-test to post-test probability, treatment effect and NNT, fragility index, sample size, descriptive statistics), five appraisal checklists, six worked appraisals of landmark trials, and a gallery of eight annotated figures of the plots that appear in journal articles.
RCEM-aligned ultrasound logbook for your Kaizen portfolio, on-device only.
RCEM-aligned point-of-care ultrasound logbook for your Kaizen portfolio. Case-by-case entries with images, findings, supervision level and RCEM entrustment scale. Built-in crop, zoom, rotate and blur to protect patient identity before export. Export any case or the whole logbook as PDF, Word or Excel.
ResusDoc began as the calculations and checklists one clinician kept rebuilding on shift. The principles are simple: evidence first, friction last. Every tool cites its source, loads in under a second, and shows its working — so you stay the decision-maker, not the calculator.
Tied to RCUK, NICE and APLS guidance — Winter's formula, ARDSNet targets, Berlin criteria — with the source named on every result.
Static, offline-friendly pages. No account, no spinner, no data left behind. The ED is high-noise and high-stakes; these tools offload the arithmetic so your attention stays with the patient.
Inputs and formulae are visible, so clinical judgement always sits on top. Every clinical decision tool here is free, with no paywalls or accounts, for every clinician, at any grade. A small number of separate portfolio and training products are paid — clearly marked as such.
Every calculation runs locally in your browser — no patient identifiers, no analytics on clinical inputs, no server round-trip. ResusDoc is a clinical aid, not a record: it supports your decision and never stores it.
