chitosan with excellent biodegradable and biocompatible characteristics has received attention as an oral drug delivery vehicle for controlled-release formulations. in this study an enteric-coated capsule containing theophylline-chitosan beads based on 23 factorial designs was prepared as a colon drug delivery system. the theophylline-chitosan gel beads were formulated by adding the drug-contai...

constipation isa common clinical problem that can be functional or organic in origin. thiscondition sometimes overlaps with irritable bowel syndrome. initially, theclinician should differentiate between true and false constipation by clinicaland preclinical evidence such as colonic transit time. numerous patients believethat all defecation problems are called constipation and use laxatives with...

background: clinical and epidemiological variation was seen between the colon cancer (cc) and rectum cancer (rc). so, there is not so much data available about the epidemiological and clinicopathological differences and prognostic factors regarding to cc and cr in iran, we aimed to perform this study. methods: all cases of cc and rc referred to oncology and gastroenterology wards of taleghani g...

a man with metastatic carcinoma of the colon had a bone scan which revealed urinary retention in the leftkidney. ten months later, a tc-99m-dtpa renai glomerular study showed the left kidney to have only 8% oftotal renal function. fifteen months after that, (he same kidney demonstrated 9% of total function, while theright kidney had evolving obstruction due to his neoplasm. the case shows that ...

In this theoretical study, the effect of various types of bypass graft angles on the flow field, has been investigated specially on the temporal Wall Shear Stress (WSS) on the toe, heel and some locations on the bed of the Left Anterior Descending (LAD) artery at the anastomoses areas in the Aorto-Coronary (AC) and Coronary-Coronary (CC) bypasses. Flow fields in both bypasses with angles of...

conclusions in cabg with cardiopulmonary bypass, using plasma cortisol level as a measure, isoflurane-sufentanil significantly reduces the stress response to the surgery, when compared to propofol-sufentanil. results compared to the baseline (t0), at the end of cardiopulmonary bypass (t1), both groups demonstrated a decrease in plasma cortisol levels with no statistical significant difference (...

abstract bowel obstruction is a known complication after bariatric surgery especially roux-en-y gastric bypass. the known etiologies include internal hernia, jejunojejunostomy stricture, ileus, intussusceptions, superior mesenteric artery syndrome, incarcerated port site hernia, and adhesions. blood clot is a rare cause of small intestinal obstruction after laparoscopic roux-en-y gastric bypass...