Praxis
Critical care, kept current

Master the physiology behind every critical decision.

Praxis is a hypermodern learning platform for intensivists: guided tutorials, single-best-answer assessment, a live PubMed evidence feed, a landmark-trials library, bedside calculators and a journal-club calendar — across the whole ICU curriculum.

Create free account I already have an account

For NHS clinicians — sign up with your NHS.net email. Passkeys supported.

Guided tutorials

Concise, accurate explainers that build physiological intuition — not rote facts.

Single-best-answer practice

Exam-style questions and timed mocks with worked explanations, so every attempt teaches.

Progress that sticks

Your reading and best scores are saved per topic, so you always know what to revisit.

Live PubMed evidence

A current evidence stream across the core ICU curriculum, searchable and filtered by topic.

Landmark trials library

The trials that shaped practice — summarised, searchable and annotated by your team.

Bedside calculators

Fast, validated tools for the numbers you reach for on the unit, computed live.

Journal club & teaching

A shared calendar for sessions, with structured peer feedback and thank-yous.

Secure by design

Passwordless passkeys, two-factor authentication and verified NHS.net sign-up.

Built around the curriculum you’re examined on

24 tutorials and growing, organised across the domains that matter at the bedside.

Physiology

1 tutorial

Oxygen transport, shock states and the maths that ties them together.

Respiratory

1 tutorial

Gas exchange, respiratory failure and the physiology of the breath.

Ventilation

2 tutorials

Lung-protective strategies, ARDS and the mechanics of the ventilator.

Cardiology

1 tutorial

The failing circulation, from preload to the arterial waveform.

Sepsis

1 tutorial

Recognition, bundles and the haemodynamics of a hostile host response.

Infection

2 tutorials

Antimicrobials, stewardship and the microbiology of the critically ill.

Neurology

1 tutorial

Brain injury, intracranial pressure and neuroprotection.

Psychology

1 tutorial

Delirium, sedation, and the psychological aftermath of critical illness.

Renal

1 tutorial

AKI, replacement therapy and the kidney as arbiter of balance.

Gastro & Hepatic

2 tutorials

Liver failure, GI bleeding and the gut in critical illness.

Endocrine

1 tutorial

Glucose control, adrenal and thyroid emergencies, metabolic crises.

Haematology

1 tutorial

Coagulation, transfusion and the blood in critical illness.

Pharmacology

1 tutorial

Vasoactive drugs, sedation and the receptors behind the infusions.

Toxicology

1 tutorial

Poisoning, antidotes and the principles of the deliberate overdose.

Trauma

1 tutorial

Damage control, massive haemorrhage and the polytrauma patient.

Nutrition

1 tutorial

Feeding the critically ill, refeeding risk and metabolic support.

Fluids & Acid–Base

1 tutorial

Fluid choice, electrolyte derangement and the acid–base map.

Resuscitation

1 tutorial

Cardiac arrest, ALS and post-resuscitation care.

Obstetric

1 tutorial

The critically ill mother — pre-eclampsia, haemorrhage and beyond.

Ethics & EoL

1 tutorial

Capacity, consent, withdrawal and end-of-life decision-making.

Monitoring

1 tutorial

Haemodynamic monitoring, waveforms and what the numbers mean.

Start learning in under a minute

Verify your NHS.net email, add a passkey, and your progress follows you across every device.

Create free account

About Praxis

Critical care knowledge, kept current

Praxis was created by Dr Theophilus Samuels (Consultant in Critical Care and Anaesthetics) to help residents and doctors in intensive care medicine learn the core curriculum and stay up to date — in one calm, modern place that brings tutorials, assessment, landmark evidence and bedside tools together.

AI-generated content — verify before any clinical use

The educational content on Praxis — tutorials, explanations, questions, trial summaries and calculator notes — was written with the assistance of Claude Opus 4.8 (Anthropic). AI can be confidently wrong: it may contain errors, omissions, oversimplifications or out-of-date information. Treat everything here as a study aid, not a source of truth, and independently verify it against primary literature and your current local and national guidelines before applying it to patient care.

How the content is made

Praxis’s explanatory content is authored using Claude Opus 4.8, Anthropic’s large language model, guided and curated toward the intensive-care curriculum. The aim is breadth and clarity across a wide syllabus, with diagrams and practice questions to make it stick.

The evidence feed is live from PubMed (NCBI E-utilities); article titles, dates and abstracts come directly from PubMed, while any summarised “bottom line” is taken from the paper’s own conclusion. Always read the full paper before drawing conclusions.

What’s inside

  • Guided tutorials

    Advanced explainers across physiology, ventilation, sepsis, pharmacology and more, each with diagrams and single-best-answer questions.

  • Practice & exams

    A question bank with instant-feedback practice and timed exam modes, plus weak-topic insights to focus your revision.

  • Landmark trials

    The trials that shaped modern intensive care — what each changed, its guideline impact, and a critical appraisal.

  • Live evidence

    A current feed from PubMed across the curriculum, with inline abstracts and a date filter.

  • Bedside calculators

    Common critical-care calculations with live results and interpretation.

Your responsibility as a clinician

  • Praxis is for education and revision only. It is not medical advice and not a substitute for clinical judgement, supervision or local protocols.
  • Always confirm drug doses, thresholds and management against an authoritative, current source before acting.
  • Guidelines and evidence change; content here may lag behind the latest recommendations.
  • If you spot an error, please don’t rely on it — and let us know so it can be corrected.

Educational use only Not a substitute for clinical judgement.