MICA · FIRST-LINE LEARNING NOTES
Understand, prioritise and organise follow-up
Shock involves inadequate tissue perfusion. Recognise organ compromise and obtain appropriate assistance immediately.
Recognise hypoperfusion
Confusion, cold extremities, mottling, delayed capillary refill and reduced urine output suggest hypoperfusion. Interpret blood pressure alongside these findings: a preserved reading alone is not reassuring. Warm skin does not exclude distributive shock. Assess respiratory distress and visible or concealed bleeding at the same time. Absence of a classic sign does not negate clinical deterioration.
[1][2]Identify mechanisms and combinations
Consider blood or fluid loss, cardiac failure, circulatory obstruction and vasodilation, including sepsis or anaphylaxis. Several mechanisms may coexist. Repeat vital signs and assess mental state, skin perfusion and available urine output; add ECG and targeted tests. Lactate can inform context and trajectory but neither identifies a specific mechanism nor replaces examination. Ultrasound performed by a trained operator may help distinguish causes.
[1][3]Blood pressure is part of assessment rather than a complete measure of perfusion. Interpret new confusion, cool extremities and reduced urine output in context. Record baseline findings and the response to each intervention. Fluid administration should not continue mechanically when breathlessness, congestion or lack of benefit develops.
[1][3]Activate coordinated emergency care
Immediately activate emergency or critical care support with suitable monitoring and transport. Investigation of the cause must not delay life-saving measures. Definitive care depends on the mechanism: haemorrhage control, coronary or obstructive pathways, anaphylaxis treatment or infection source management. Indiscriminate fluid administration can be harmful; indication and continuation require individual assessment and frequent reassessment by the responsible team.
[2][3][4]- Control accessible bleeding and immediately activate the appropriate emergency pathway.
- Reassess consciousness, breathing and perfusion after each intervention, including possible treatment complications.
- Arrange appropriate medical transport and communicate timings, treatments, administered volumes and observed responses.
Follow the trajectory rather than one number
After every intervention, compare perfusion, consciousness, breathing and blood pressure, accounting for treatment already given. Better blood pressure with persistent mottling or confusion requires further assessment. Recording times, response and handover supports continuity. Following septic shock, review physical or cognitive sequelae, reconcile medicines and assess the needs of the patient and family after hospital discharge.
[1][3]A learning situation
FICTIONAL CASE · SELF-REFLECTION WITHOUT A SCORE
A 68-year-old woman with fever since yesterday becomes confused. Her extremities are cold and mottled. One blood pressure reading is close to her usual level; her family reports very little urine.
Should escalation wait for clear hypotension?
Read the reasoning
No. Perfusion abnormalities and confusion already indicate serious illness. Sepsis with organ dysfunction is possible and requires immediate assessment while other causes are considered. Calling the appropriate team, monitoring and communicating the trajectory take priority over waiting for another laboratory result or a lower blood pressure.
References and scope
- ESICM guidelines on circulatory shock and hemodynamic monitoring 2025 ↗
- The ABCDE Approach — updated July 2024 ↗
- Surviving Sepsis Campaign: International Guidelines for Management of Sepsis and Septic Shock 2026 — recommendations ↗
- Suspected sepsis in people aged 16 or over: recognition, assessment and early management — NG253, Managing suspected sepsis ↗
Original educational synthesis for adult first-line practice. International references must be interpreted with the clinical setting and local care pathways. Independent human scientific review remains to be confirmed.