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  • Title: Lateral internal sphincterotomy together with haemorrhoidectomy for treatment of haemorrhoids: a randomised prospective study.
    Author: Galizia G, Lieto E, Castellano P, Pelosio L, Imperatore V, Pigantelli C.
    Journal: Eur J Surg; 2000 Mar; 166(3):223-8. PubMed ID: 10755337.
    Abstract:
    OBJECTIVE: To investigate anorectal manometric findings in patients with haemorrhoids and to evaluate the clinical effects and physiological consequences of adding a lateral internal sphincterotomy (LIS) to haemorrhoidectomy. DESIGN: Randomised prospective study. SETTING: Teaching hospital, Naples. PATIENTS: 48 consecutive patients with prolapsed piles who had anorectal manometry; 10 healthy volunteers served as controls. INTERVENTIONS: Resting and squeeze pressures, sphincter length and rectoanal inhibitory reflex were recorded. 6 patients were excluded because anal pressures were not raised, so 42 patients were randomised. 22 patients had haemorrhoidectomy plus LIS; and 20 had haemorrhoidectomy alone. MAIN OUTCOME MEASURES: Morbidity, continence, and anorectal manometry. RESULTS: Sphincter anomalies were found in 87.5% (n = 42) of patients. Haemorrhoidectomy alone did not affect anal pressures, which returned to the normal ranges after sphincterotomy. Those who had LIS did better postoperatively than those who had did not. 4 patients who did not have a sphincterotomy developed anal strictures. No patient who had LIS developed incontinence of faeces. CONCLUSIONS: High anal pressures are common in patients with haemorrhoids suggesting that they may have a pathogenetic role; anorectal manometry is useful in the investigation of anal pressure patterns; and when indicated, lateral sphincterotomy avoids pain, urinary retention, and stenosis, and is safe.
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