Gastro

Constipation

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Pathology

Defined as hard stools with straining on defecation, sensation of incomplete evacuation and fewer than three defecations per week

Aetiology

Increased age, inadequate fibre, drugs (opiates, anticholinergics, iron), slow bowel transit, constipation, spinal cord lesions, Hirschsprung’s disease, Chagas’ disease, autonomic neuropathy, hypothyroidism, hypercalcaemia, hypopituitarism, Addison’s disease

Signs

Tenesmus.

Symptoms

Straining, sensation of incomplete evacuation, requiring manoeuvres to open bowels, manual evacuation

Investigations

Bloods: FBC, U&E, LFT, TFTs and Calcium
Imaging: Colonic transit study

Treatment

Conservative: Lifestyle advice and increased dietary fibre
Medical: Laxatives

Prognosis

Good prognosis with treatment
Anal fissure, chronic haemorrhoids, faecal impaction 

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Key References

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