Publications by authors named "L T Lasanen"

The effect of short-term urinary bladder distension on bladder perfusion and adrenergic innervation was studied in Sprague-Dawley rats. Distension was induced for three hours by forced diuresis and balloon obstruction. A 2% solution of trypan blue was injected into the tail vein 12, 24, 36 and 48 hours after distension and the animals were killed 5-10 min after the injection.

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The effect of short-term urinary bladder distension on its cholinergic innervation was studied in Sprague-Dawley rats. Distension was induced for 3 h by forced diuresis and balloon outlet obstruction, and whole thick biopsy specimens were taken from the dome and lateral side of the anterior body 2, 7 and 21 days afterwards. The acetylcholinesterase (AChE) method was used to demonstrate the cholinergic nerves in the distended bladder wall.

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The effect of acute distension on vasoactive polypeptide (VIP)-, neuropeptide Y (NPY)- and substance P (SP)-immunoreactive nerves in the wall of the urinary bladder was investigated. At the age of 3 months, 25 female albino rats underwent forced diuresis combined with balloon obstruction to achieve maximal distension for 3 h. A modified, indirect immunofluorescence detection method was applied 2 days, 7 days and 21 days after distension.

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The effect of transient acute overdistension produced by forced diuresis and outflow occlusion was examined in female Sprague-Dawley rats. Their bladders were distented for three hours and studied at selected intervals during the postoperative period using high performance liquid chromatography (HPLC) for the exact measurement of tissue noradrenaline. Biopsies were taken from the bladder dome and anterior body 10 hours, 2 days, 7 days and 21 days after overdistension.

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It has been claimed earlier that perivascular sympathectomy removes distal adrenergic innervation of the vessels. Based on preliminary results suggesting the contrary, the purpose of this work was to reconsider the denervation effect of perivascular sympathectomy. We operated on 40 rats using different denervation methods mainly to test the effects of perivascular sympathectomy on the distal saphenous vessels of the leg.

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