[Tolerability, safety, and efficacy of sodium phosphate preparation for colonoscopy: the role of age]. / Tolerancia, seguridad y eficacia de la preparación para colonoscopia con fosfato de sodio: el papel de la edad.

OBJECTIVES: To compare subjective tolerance and secondary adverse events to bowel cleansing prior to colonoscopy with polyethylene glycol (PEG) and sodium phosphate (NaP) in adult patients and in those 65 or more years old. MATERIAL AND METHODS: Retrospective matched study, choosing 140 patients among all of those who underwent colonoscopy from March 2004 to May 2005. We investigated the presence of the next adverse events during bowel preparation: Fever, low digestive bleeding, abdominal pain, perianal pain, nausea, vomiting, thirst, somnolence, agitation, tremor and convulsions. We considered bad objective tolerance if the patient presented any one of these events. We also asked patients about subjective tolerance to preparation. RESULTS: Seventy patients prepared with PEG and seventy with NaP were included (69 women and 71 men, mean age 60.6 +/- 14.8 years). There was no relationship between subjective tolerance or the presence of adverse events and bowel cleansing with any of the products in general population or in elderly patients (p = 0.09 and p = 0.45 in the elderly). However, patients prepared with NaP showed more nausea than those who employed PEG (p < 0.009), overall women of 65 or more years old. There were no severe adverse events in patients prepared with NaP. Elderly showed better tolerance than younger patients, and women worst tolerance than men, irrespective of the lavage preparation employed. Patients prepared with PEG unfinished bowel cleansing more frequently than those with NaP. Cleanliness achieved with NaP was significantly better than that obtained with PEG. CONCLUSIONS: Bowel cleansing prior to colonoscopy with NaP is as well tolerated, safe and effective as with PEG, even in elderly healthy patients, although it causes more nausea. Cleanliness with NaP is better than that achieved with PEG.

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