Many non-invasive tests have been studied for diagnosis and determining the activation degree of inflammatory bowel disease (IBD). Nevertheless, an ideal test has not been found yet. Mean platelet volume (MPV) is influenced by the inflammation. In a few study, decreased platelet volume have been reported in IBD. The aim of this study is to determine whether platelet volume would be useful in ulcerative colitis (UC) activity. Additionally we have analyzed overall accuracy of MPV in disease activity and compared with other inflammatory markers. A total of 61 UC patients (male/female : 41/20), and 27 healthy subjects (male/female : 18/9) were enrolled into the study. For all subjects following tests were performed; ESR, CRP, white blood cell count and mean platelet volume. A statistically significant decrease in MPV was noted in patients with UC (8.29 +/- 1.02 fL) compared with healthy controls (8.65 +/- 0.79 fL). MPV of active UC (8.06 +/- 1.19 fL) patients were significantly lower than that of inactive UC (8.45 +/- 0.87 fL). Overall accuracy of MPV in determination of active UC was 71% (with sensitivity 67%, specificity 73%). A negative correlation was found between MPV and endoscopic activity index (r : -0.358 p : 0.005). In UC, MPV did not correlate with ESR, CRP and white blood cell. Our study showed that MPV reduced in UC, particularly in patients with active UC. Decreased MPV may be an indicator for increased disease activity in patients with UC.

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AbstractOral sodium phosphate (NaP) is increasingly being used for bowel preparation. There are several reports of significant serum electrolyte changes after the administration of oral NaP solution in renal failure. We report a case of postoperative hypoparathyroidism who developed severe hyperphosphatemia and associated hypocalcemia after bowel preparation with oral NaP. A 39-year old woman was admitted to the hospital because of multiple bone fractures. The diagnosis of primary hyperparathyroidism was confirmed. Further assays suggested Cushing’s disease and MRI disclosed a pituitary microadenoma. Considering the diagnostic suspect of multiple endocrine neoplasia type 1, computed tomography of abdomen was performed, showing a mass in the right adrenal. The patient underwent transsphenoidal surgery and then total parathyroidectomy. Despite total removal of the microadenoma by transsphenoidal surgery, there was no suppression in serum cortisol levels. So, an operation was scheduled for the adrenal tumor. The patient was administered 45 mL oral NaP solution for bowel cleansing before the surgery. Although her calcium and phosphorus levels were normal before NaP administration, four hours later she developed respiratory distress and tetany. Laboratory studies revealed severe hyperphosphatemia and hypocalcemia. We conclude that the use of NaP for bowel preparation should be avoided in patients with hypoparathyroidism.

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