Which term describes a condition that will prevent or restrict a treatment from being carried out?

• A. Contra-indication
• B. Contra-actions
• C. Oedema
• D. Thrombosis

Answer: (A)

This question tests recognizing a condition that will prevent or restrict a treatment from being carried out. The best term is contra-indication, which means a condition or factor that makes a treatment unsafe or inappropriate, so the procedure cannot be performed as planned unless it's modified or not done at all.

Contra-indications are specific reasons to avoid or adjust a treatment, such as active infections or certain medical conditions. By contrast, contra-actions are adverse reactions that can occur during or after a treatment, not reasons to withhold the treatment from the start. Oedema is swelling and a symptom that might influence whether a treatment is suitable in a given case, but it isn’t the term used to describe a factor that prevents treatment in general. Thrombosis is a serious medical condition involving a blood clot and could be a contraindication in some scenarios, but the question asks for the general term, which is contra-indication.