Introduction
Information overload is the defining characteristic of modern clinical practice. The challenge is no longer finding information; it is filtering it. To practice safely and efficiently, clinicians need to move away from a "Google-first" approach and adopt a structured "Information Stack."
This article outlines a tiered strategy for clinical information retrieval, helping you understand which layer of the evidence base to access for different clinical scenarios. By mastering this stack, you can move from question to verified answer in under three minutes.
The “stack” concept: not one tool—layers
Effective clinical search is hierarchical. You should start at the most synthesised, relevant layer and only drill down if necessary.
Layer 1: The UK baseline (NICE guidelines + CKS)
- What it is: The national standard. NICE Guidelines provide the comprehensive evidence base and policy recommendations. Clinical Knowledge Summaries (CKS) operationalise this for primary care.
- When to use: For 90% of routine clinical queries. Start with CKS for immediate management steps. Go to the full guideline for policy context or complex care pathways (NICE, Clinical Knowledge Summaries).
Layer 2: Depth & specialty (SIGN and societies)
- What it is: High-quality, evidence-based guidelines from SIGN (often covering topics in greater clinical depth than NICE) and specialty bodies like the BTS (British Thoracic Society) or BASHH (Sexual Health).
- When to use: When NICE is too generic, or for specific specialty conditions (e.g., asthma management, where BTS/SIGN is the gold standard) (SignAC).
Layer 3: Local reality (pathways & formularies)
- What it is: Your Trust's antimicrobial policy (often on MicroGuide), local referral criteria, and ICB formularies.
- When to use: For every prescribing decision and referral. National guidance says "prescribe an antibiotic"; local guidance says "prescribe this antibiotic." Local policy always trumps national guidance for formulary choices.
Layer 4: Evidence deep-dive (systematic reviews / primary papers)
- What it is: Cochrane Reviews and primary RCTs found via PubMed or Trip.
- When to use: For academic interest, complex patients who don't fit the guidelines, or when preparing a presentation. This is too slow for a standard 10-minute consultation.
A 3-minute search workflow (mid-consult)
- Minute 1: Identify the clinical question. Open iatroX (or your preferred summary tool).
- Minute 2: Ask the question. Review the immediate answer which synthesises Layer 1 (NICE/CKS) and Layer 3 (BNF dosing).
- Minute 3: Click the citation link to verify the specific recommendation in the source document. Apply to patient.
A 10-minute verification workflow (when it matters more)
For high-stakes decisions or complex comorbidities:
- Start with Layer 1: Check the standard pathway.
- Cross-reference Layer 2: Does a specialty guideline offer more nuance?
- Consult Layer 4: Is there a recent systematic review that challenges the guideline?
- Synthesise: Document your reasoning, citing the specific guidance used.
Where iatroX fits
iatroX is designed to be the single entry point for this stack.
- One query: You ask a natural language question.
- Structured answer: The AI retrieves relevant information from Layers 1, 2, and 3 simultaneously.
- Conflict mode: If the BNF and NICE differ, or if a SIGN guideline updates a NICE recommendation, iatroX aims to surface this divergence, allowing you to make the safest choice without having to manually compare tabs.
FAQ
Why not just use Google? Google prioritises SEO, not clinical evidence hierarchy. It mixes patient leaflets with US-centric advice, adding cognitive load to your search.
How do I find local pathways? These are often trapped on intranets. iatroX is working on features to index local guidance, but for now, bookmarking your Trust's specific portal or using apps like MicroGuide is essential.
Is it safe to rely on summaries? Summaries like CKS are safe for routine care because they are rigorously maintained. However, for complex or high-risk decisions, you must always verify the detail in the full guideline or primary source.