Critical Care
Critical Care
High-yield surgical critical care that links physiology to deterioration, with current UK guidance used where fluids, sepsis, transfusion or organ-support recommendations can change.
Recommended start Shock & Major Haemorrhage

Featured lessons
Start with the essentials.
Guide-selected lessons that establish the most useful foundations for this subject.

Shock & Major Haemorrhage
A surgical critical-care framework for recognising shock, separating the main physiological types and managing haemorrhagic deterioration without treating blood pressure as the diagnosis.
Read lessonSepsis & Source Control
An MRCS-focused sepsis lesson audited against NICE NG253, including NEWS2-based risk, current fluid boluses, antibiotic timing and source control.
Read lessonAcid–Base, Electrolytes & Acute Kidney Injury
Combine blood-gas logic, anion-gap reasoning, electrolyte safety and current NICE AKI recognition into one surgical critical-care approach.
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Resuscitation & perfusion
Recognise shock, choose fluid and blood therapy for a defined purpose, and treat uncontrolled infection or haemorrhage in parallel.
- Read lesson
Shock & Major Haemorrhage
A surgical critical-care framework for recognising shock, separating the main physiological types and managing haemorrhagic deterioration without treating blood pressure as the diagnosis.
13 min readActive recall - Read lesson
Sepsis & Source Control
An MRCS-focused sepsis lesson audited against NICE NG253, including NEWS2-based risk, current fluid boluses, antibiotic timing and source control.
14 min readActive recall - Read lesson
IV Fluids, Blood & Coagulation in Surgical Care
A guideline-audited surgical fluid and transfusion lesson using NICE CG174 and NG24, with clear separation of resuscitation, maintenance and active haemorrhage.
15 min readActive recall
Organ dysfunction & respiratory support
Interpret acid–base and renal deterioration, then connect respiratory physiology to ARDS and lung-protective support.
- Read lesson
Acid–Base, Electrolytes & Acute Kidney Injury
Combine blood-gas logic, anion-gap reasoning, electrolyte safety and current NICE AKI recognition into one surgical critical-care approach.
15 min readActive recall - Read lesson
ARDS & Acute Respiratory Failure
A critical-care bridge from respiratory physiology to ARDS, invasive ventilation, predicted-body-weight tidal volumes and prone positioning.
14 min readActive recall
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