The development of colonic manometry and its clinical application in children with colonic dysmotility / 中华实用儿科临床杂志

Colonic dysmotility is a common gastrointestinal motility disease in children, with the main manifestations of abdominal distension and constipation.Colonic manometry is currently considered as a standard diagnostic method for assessing colonic motility, which real-time measures intracolonic pressure and the shape and coordination of colonic muscle pressure waves at rest and stimulating states and thus qualitatively and quantitatively assess the colonic movement.Recently, high-resolution colonic manometry has been rapidly developed into a major technique for obtaining more effective information involved in the physiology and/or pathophysiology of colonic contractile activity in colonic dysmotility patients.This review focuses on the development of colonic manometry and its clinical application in children with colonic dysmotility.

Visceral Hypersensitivity and Altered Colonic Motility in Type 2 Diabetic Rat

BACKGROUND/AIMS: Abnormal visceral sensitivity and disordered motility are common in patients with diabetes mellitus. The purpose of the present study was to investigate whether visceral sensation and bowel motility were altered in a rat model of type 2 diabetes mellitus accompanied by weight loss. METHODS: A type 2 diabetic rat model in adulthood was developed by administrating streptozotocin (STZ; 90 mg/kg, i.p.) to neonatal rats. Eight weeks after STZ administration, rats with blood glucose level of 200 mg/dL or higher were selected and used as diabetic group (n = 35) in this study. Abdominal withdrawal reflex and arterial pulse rate were measured to examine visceral nociception induced by colorectal distension (0.1-1.0 mL). The amplitude, frequency, and area under the curve (AUC) of spontaneous phasic contractions of colonic circular muscles were recorded in vitro to examine colonic motility. RESULTS: STZ-treated diabetic rats gained significantly less weight for 8 weeks than control (P < 0.01). Forty-eight percent of the diabetic rats showed enhanced visceral nociceptive response to colorectal distension. Diabetic rats did not differ from control rats in colorectal compliance. However, the frequency and AUC, not the amplitude, of colonic spontaneous contraction in vitro was significantly decreased in diabetic rats compared to control rats (P < 0.01 in frequency and P < 0.05 in AUC). CONCLUSIONS: These results demonstrate visceral hypersensitivity and colonic dysmotility in a rat model of type 2 diabetes mellitus accompanied by weight loss.

Use of locally innovated radiopaque markers (MAKKO pills) for colonic transit study

Locally made radiopaque markers for colonic transit study are presented, specifically on how they were made, and how they compared radiographically with markers available abroad. These markers were produced using locally available materials like barium powder, a feeding tube, cyanoacrylate, and emptied drug capsules. They were then ingested and monitored by X-ray. They were found to be radiographically comparable with imported ones. No adverse events were noted when used in 5 patients: 2 patients with constipation secondary to chronic laxative abuse, 2 patients with reducible complete rectal prolapse, and 1 patient with constipation secondary to short segment Hirschsprungs' Disease. (Author)