Impaired response of main pancreatic duct to secretin stimulation in early chronic pancreatitis |
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Authors: | Dr Luigi Bolondi MD Silvia Li Bassi MD Stefano Gaiani MD Vittorio Santi MD Lucio Gullo MD Luigi Barbara MD |
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Institution: | Department of Medicine and Gastroenterology, University of Bologna, Italy. |
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Abstract: | In the present study we compared sonographic measurements of the main pancreatic duct (MPD) following maximal secretin stimulation (75 CU intravenous in 1 min) in 15 chronic pancreatitis patients (CP) with those of 18 normal control subjects. The mean caliber of the main pancreatic duct was 1.2 +/- 0.4 mm in controls and 1.8 +/- 0.9 in patients with chronic pancreatitis (P less than 0.025). In the control group a dilatation of the duct with a peak at the third minute was found. In patients with chronic pancreatitis a flatter profile of the response curve with a slower increase and inconstant return to basal values was found. A statistically significant difference was found between absolute variations of MPD caliber over basal values (1.7 +/- 1.06 in controls vs 0.8 +/- 0.69 in CP, P less than 0.005) and the dilatation index (Dmax - D)/D] (1.31 +/- 0.6 in controls vs 0.66 +/- 0.69 in CP, P less than 0.005). The mean percent increase at the third minute was 131% in control subjects vs 53% of patients with CP (P less than 0.0005). In the five cases of CP showing a caliber increase greater than 100%, a persistent dilatation (100-200%) was found 15 min after secretin administration. At this time, the mean percent increase over basal value in controls was 25%.(ABSTRACT TRUNCATED AT 250 WORDS) |
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