The Use of Faecal Calprotectin in Primary Care

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The Use of Faecal Calprotectin in Primary Care Ian Arnott Consultant Gastroenterologist Western General

The Use of Faecal Calprotectin in Primary Care Ian Arnott Consultant Gastroenterologist Western General Hospital Edinburgh

MH 30 years female 3/12 history of abdominal pain Right sided Constipation – BOx

MH 30 years female 3/12 history of abdominal pain Right sided Constipation – BOx 1/week No weight loss, appetite unchanged No past medical history Non-smoker

Investigations Full blood count Hb 127 WCC 7. 9 Plt 293 USS normal

Investigations Full blood count Hb 127 WCC 7. 9 Plt 293 USS normal

Impression “. . . I think the most likely diagnosis is constipation predominant irritable

Impression “. . . I think the most likely diagnosis is constipation predominant irritable bowel syndrome. I would suggest a trial of laxatives. . . ” Ian Arnott BUT Faecal calprotectin >2500 g/g

Colonoscopy

Colonoscopy

Difficult to differentiate organic from functional symptoms IBD more common Up to 2% of

Difficult to differentiate organic from functional symptoms IBD more common Up to 2% of population in high areas

Delay in diagnosis of IBD is important

Delay in diagnosis of IBD is important

Colonoscopy • Key diagnostic tool – Colorectal cancer – Inflammatory bowel disease – Etc

Colonoscopy • Key diagnostic tool – Colorectal cancer – Inflammatory bowel disease – Etc etc. . . • BUT patients with IBS do not always need this – Unpleasant – Reinforce doubt about diagnosis – Resource intensive

Faecal calprotectin

Faecal calprotectin

Faecal Calprotectin: IBD v IBS Henderson et al. AJG 2014

Faecal Calprotectin: IBD v IBS Henderson et al. AJG 2014

Organic v IBS

Organic v IBS

Organic v IBS Cut off <50µg/g Sensitivity 99% Specificity 74% Cut off <100µg/g Sensitivity

Organic v IBS Cut off <50µg/g Sensitivity 99% Specificity 74% Cut off <100µg/g Sensitivity 94% Specificity 82%

Durham Dales Primary Care Pilot 6. 3% prevalence of IBD 25% of presenting patients

Durham Dales Primary Care Pilot 6. 3% prevalence of IBD 25% of presenting patients are referred FC testing saved 129 referrals Greater satisfaction for patients Approval from GPs

Gastroenterology in Lothian 1 in 10 consultations in primary care Referrals in Lothian July

Gastroenterology in Lothian 1 in 10 consultations in primary care Referrals in Lothian July 13 – June 14 Total 7898 WGH 3379 RIE 3325 St John’s 1126

NICE Guidance Recommended in children and adults IBD v IBS in those with lower

NICE Guidance Recommended in children and adults IBD v IBS in those with lower GI symptoms, if: Cancer not suspected Appropriate Quality assurance

Cost Effectiveness NICE estimates – most conservative FC assay costs £ 22 Colonoscopy £

Cost Effectiveness NICE estimates – most conservative FC assay costs £ 22 Colonoscopy £ 741 Compared with current practice FC saves £ 82 – 240 per patient seen

FC Experience in Lothian Kennedy NA et al, JCC 2014

FC Experience in Lothian Kennedy NA et al, JCC 2014

Faecal calprotectin: Results Functional v other GI conditions Sensitivity 89% Negative predictive value 93%

Faecal calprotectin: Results Functional v other GI conditions Sensitivity 89% Negative predictive value 93% Functional v IBD Sensitivity 99% NPV 100%

FC together with Alarm Symptoms

FC together with Alarm Symptoms

Calprotectin: Who to test

Calprotectin: Who to test

FC algorithm

FC algorithm

Lothian Algorithm - Pilot Age less than 50? no Consider referral as per current

Lothian Algorithm - Pilot Age less than 50? no Consider referral as per current guidance yes Alarm symptoms? Referral for urgent investigation Faecal calprotectin, Stool culture, Coeliac screen & FBC Referral for D 2 bx or other investigation FC 50 - 150 FC<50 FC >150 Repeat calprotectin in 4 – 6 weeks. Functional diagnosis likely Functional diagnosis Referral for investigation

Conclusions Faecal calprotectin can effectively differentiate between IBS and organic GI conditions Simple to

Conclusions Faecal calprotectin can effectively differentiate between IBS and organic GI conditions Simple to assay Helps select patients for referral or investigation Cost effective Pilot in Lothian planned – please take part! ian. arnott@luht. scot. nhs. uk

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