F6.vi · Ventilation-Perfusion Relationships

Official V4 objective

Explain venous admixture, its relationship to shunt and ventilation-perfusion (V/Q) mismatch.

1 SAQ topic 2 SAQ appearances 1 VIVA station

Current · V5 (2025) → C6.iv

Written examination

SAQ history

2 appearances

Venous Admixture

2 exam appearances

2024A Q02

(a) Describe venous admixture and the sources contributing to it in an adult (60% of marks). (b) Explain the effects of supplemental oxygen on arterial hypoxaemia (40% of marks).

43%

2009B Q06

Define venous admixture and list its causes. (50% of marks) How is it diagnosed and how is it quantified? (50% of marks)

56%

Oral examination

VIVA history

1 station

2012A · VIVA 6
This Viva will explore your knowledge of the pulmonary circulation. Briefly describe the vascular anatomy of blood flow in the lungs. …/13 13. Subsequent questions explored knowledge of venous admixture and anatomical shunts, differences between systemic and pulmonary circulations, changes in pulmonary circulation and drugs used to treat pulmonary hypertension.

Pass rate not reported

Sources: objective text from the relevant CICM syllabus; historical SAQ and VIVA wording from CICM examiner reports.