FOR REGISTERED PHYSICIANS ONLY Clinical decision support only. Final responsibility for all clinical decisions lies with the treating physician. Software may contain errors — always apply independent clinical judgement.
Emergency · Critical Care — UK

Decisions,
made precise.

UKGuideline-aligned
0%Run on-device
<1sLoad time
£0Core tools, forever
Lead II · 25 mm/s · 10 mm/mV · Sinus rhythm

Evidence-based decision support for emergency physicians and intensivists — fast, free, and built to cut cognitive load when it matters most.

The toolkit

Every tool. One standard.

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.

01 Resuscitation & Airway The first ten minutes — when the algorithm has to be right.
Live
BloodGas Pro
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 & US units.
ABG · VBG · CBGPhoto OCRARDS BerlinStewart/SIDSerial trends
Live
RSI Planner
Rapid sequence intubation checklist, drug calculator, difficult airway scoring, and post-intubation ventilator settings.
Drug dosesAirway scoringVent settings
Live
Sepsis Toolkit
UK Sepsis Trust 2024/2025 red & amber flag screening for adult, paediatric and pregnant patients. Sepsis 6 timed checklist, fluid calculator and antibiotic guidance per NICE NG253–255.
NICE NG253–255Sepsis 6Adult · Child · PregnantUK Sepsis Trust 2025
Live · RCUK 2025 + 2021
Life Support Algorithms
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.
Adult · Paeds · NewbornALS · BLS · PALS · NLSAnaphylaxisRCUK 2025 + 2021Reference documents
Live · New
Acute Behavioural Disturbance
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 — NMS, serotonin syndrome, malignant hyperthermia, anticholinergic, sympathomimetic and acute dystonia.
RCEM BPG 2023Red flagsKetamine · droperidolMCA · MHA s136Toxidrome differentiator
02 Diagnosis & Risk Stratify, score, and catch what must not be missed.
Live
PE Algorithm
Pulmonary embolism decision pathway. Wells score, PERC rule, YEARS algorithm and imaging guidance in one workflow.
WellsPERCYEARSCTPA
Live
Clinical Scores
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 and more.
Validated scoresUK unitsNICE · RCEM · BTSMulti-methodeGFR · QTc · NEWS2
Live
EM Red Flags
Emergency complaint categories with the red flags that sit under each. Searchable by specialty with disposition guidance. NHS · NICE · RCEM · BTS · RCP guidelines.
By complaintRed flagsSpecialty filtersDisposition tagsNICE · RCEM
Live
Antibiotic Guide
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.
Organism lookupAntibiotic lookupBNF / EUCASTUKHSA guidanceAntifungals · Antivirals
Live
Ischaemic Stroke
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 & Ireland guideline, including the wake-up and extended windows. Alongside it, the arterial anatomy: 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 — including the ones no model can show. An illustration for teaching, not a prediction of infarct.
Time · NIHSS · mRSThrombolysis · ThrombectomyUK & Ireland 20233D territoriesCollateral flow
Live
Trauma
Three 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, which the tool surfaces rather than quietly resolves. Bleeding and anticoagulation reversal, decided by the bleed rather than the number, with the PCC dose calculated from the INR and the three different correct answers on tranexamic acid. And silver trauma: an older person falling from standing is now the commonest type of major trauma in the national database, and the triage tools were not built for it.
NG232 · NG39 · NG24Adults & under-16sPCC calculatorSilver trauma screeningCriteria shown in full
05 Learning Resources Procedure technique, fracture management, classification systems, drug and toxicology monographs — learn it before the shift demands it.
Resources
ED Procedures
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.
RCEM DOPSStep-by-stepPitfalls & aftercare
Resources
Fracture Guidance
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.
BOAST · NICE · BSSHAdult · PaedsRed flagsDisposition
Resources
Clinical Classifications
The eponymous grading systems you reach for on shift — Stanford & DeBakey dissection, Salter-Harris, Weber, Bamford stroke syndromes, Killip, and more. Schematic diagrams, grade tables and management pointers, organised by body system.
Grading systemsDiagrams & tablesBy body systemSearchable
Resources
Drug Monographs
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.
Growing librarySmPC-verifiedEvidence appraisedSearchable
Resources
Toxicology Monographs
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: established, inferred, or traditional teaching.
Mechanism-firstEvidence-tieredLatent-phase timelinesAntidote indexGrowing library
Why it exists

Made at the bedside,
not the boardroom.

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.

01

Evidence-current

Tied to RCUK, NICE and APLS guidance — Winter's formula, ARDSNet targets, Berlin criteria — with the source named on every result.

02

Instant, at the bedside

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.

03

Transparent & free

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.

Live interpretation · BloodGas Pro
pH7.24Acidaemia
PaCO₂6.8 kPaHigh
HCO₃⁻20 mmol/LNormal
Lactate3.4 mmol/LElevated
Primary: Respiratory acidosisAcute — renal HCO₃⁻ retention. COPD exacerbation likely. Consider NIV.
bloodgas.resusdoc.uk
Privacy by design

Nothing about your patient
leaves the device.

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.

HTTPS everywhere
HSTS enforced with one-year max-age and preload. All HTTP permanently redirected to HTTPS. TLS 1.3 via Netlify CDN.
Zero clinical data storage
No patient data is ever stored or transmitted. All calculations run entirely in your browser — nothing leaves your device.
Secure headers
Full suite: CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy.
No advertising, no profiling
No adverts, no sponsorship, no third-party ad scripts. Nothing here is influenced by commercial interest, and your clinical inputs are never shared.
Clinical disclaimer
Decision support tools — not a replacement for clinical judgement. Always correlate with the clinical picture.
Always available
Netlify global CDN, 99.99% uptime SLA. Static files — no server to go down.
Dr Nirmalya Hore
The author
Dr Nirmalya Hore
MBBSFCCMPGDip DiabetologyMRCEMFRCEM

An emergency physician in the UK who builds the tools he wanted on shift. ResusDoc is built in the gaps between shifts — independent, self-funded, and made with one aim: getting clinicians to the right call, faster. Every tool here has been used in earnest, in the room, under pressure.

Dr Asim Ijaz
Clinical governance
Dr Asim Ijaz
MBBSMRCEMFRCSFCPSPGCert Med EdPGCert AI in Research

Consultant in Emergency Medicine in the NHS, and an RCEM Examiner, educator and researcher with interests in medical education, patient safety, quality improvement and global emergency medicine — supporting training and healthcare development in the UK and internationally. He provides clinical governance oversight for the patient leaflet library.