Corpus Blood Flow Research Articles

Хирургическая техника и первые клинические результаты аугментационной анастомотической уретропластики без пересечения спонгиозного тела (операция KODAMA)

In case of complex and long urethral stricture a use of augmentation technique is often limited by "critically" narrowing of urethral plate. In such cases, the augmentation anastomotic urethroplasty without division of the corpus spongiosum can be the method of choice, because it allows to perform simultaneous augmentation urethroplasty with maximal sparing of antegrade blood flow in corpus spongiosum. In urologic clinic of N.I. Pirogov City Clinical Hospital No1 the analysis of 17 patients who were undergone to augmentation anastomotic urethroplasty without division of the corpus spongiosum (Kodama technique), performed by single surgeon from 2013 to 2017 yy was done. The meant stricture length was 3.75 cm (2-6). Penile, bulbar and panurethral stricture was found in 6 (35.3%), 7 (41.2%) and 4 (23.5%) cases, respectively. Technique efficiency was 88.2% and in 2 patients (11.8%) a stricture recurrence developed. The mean maximum flow rate before and after surgery were 5.4 and 23.1 ml/s, respectively (p<0.05). The mean catheterization time was 14 (7-30) days. There were no patients with de novo urinary incontinence and erectile dysfunction. The initial results of augmentation anastomotic urethroplasty without division of the corpus spongiosum showed high efficiency. To our opinion, the antegrade blood flow sparing makes it the method of choice in patients with long non-traumatic urethral stricture (without severe spongiofibrosis), good preoperative erectile function but isolated length of "critically" narrowing of the urethral lumen.

Effect of Fasting on Mucosal Blood Flow in Antrum and Corpus of the Stomach

Gastric mucosal blood flow in the rat was determined by the indicator fractionation technique 86RbCl. Antral and corpus flow rates were determined after increasing periods of fasting, and the effect of vagotomy was assessed. The physiological stimulus of food in the stomach markedly increased antral as well as corpus blood flow, and after vagotomy lower flow rates were recorded in all parts of the stomach. With progressive starvation, the antral:corpus flow ratio decreased. The findings suggest that the antrum plays an active role in response to a physiological stimulus and may, as has been suggested by others, contribute to the control of parietal cell blood flow and secretion.

Gastric mucosal blood flow measurement

1. 1. Pertechnetate clearance ( C Tc) by the stomach before and after betazole stimulation was compared to regional measurements of gastric blood flow utilizing nuclide (Chromium-51 and Cerium-141) labeled microspheres in five piglets. 2. 2. Pertechnetate clearance closely correlated (correlation coefficient 0.926) with mucosal blood flow in the gastric corpus measured by the microsphere technique. Betazole increased blood flow in the corpus region by 100% but did not alter this relationship. Except in one experiment, microsphere blood flow valves in the antrum and fundus were unchanged by betazole and did not significantly correlate with pertechnetate clearance. 3. 3. Pertechnetate clearance appears to be a reliable method of determining gastric mucosal blood flow in experimental animals and may be considered as a noninvasive method for measuring such flow in humans.

Gastric blood flow of the corpus and the antrum measured by a thermoelectrical method

The gastric blood flow of corpus and antrum was simultaneously measured using a modified thermocouple method stimulated by intravenous administration of histamine, Leogastrin, pentagastrin or secretin. Attitude of the change of gastric blood flow in corpus and antrum showed different attitude between the both in depend on kind of the stimulants. The change of blood flow of the corpus didn’t indicate the changing antral blood flow of the stomach. This results suggest that each stimulant has a characteristic affective mechanism.