/ /

Chronicles Provided by Pictilisib-Researchers Who Have Acheived Success

After hydration, the slides were stained with the Verhoeff's elastic stain and van Gieson's counterstain technique to highlight the internal elastic lamina. Additional hematoxylin and eosin stained slides were obtained in a standard manner. Sections were analyzed using digital planimetry (AxioVision Rel 4.8.1; Carl Zeiss Microimaging GmbH, Jena, Germany). The neointima of the vein wall opposite to the anastomosis was measured as the distance between the internal elastic lamina and the lumen at five evenly spaced locations (Fig 3). The total length of the intimal hyperplasia cushion and see more the lengths of the pseudointima fields at the heel and hood side of the graft were measured. Data were expressed as mean �� SD. The patency was analyzed by means of ��2 analysis and log-rank test. Differences selleck screening library between flow rates within the same groups were calculated using the Wilcoxon test, and between the groups using the Mann-Whitney U test and the Kruskal-Wallis test. P values <.05 were considered as being statistically significant. After 6 weeks, six out of eight straight grafts (cumulative patency 25%) and three out of eight Venaflo grafts (cumulative patency 62%) were occluded (Fig 4). Although the patency rate of the Venaflo group was doubled at the end of the experiment, the differences were statistically not significant. The measured flow rates at the time of graft harvest were significantly lower statistically compared with the flow rates at implantation (P < .05). The differences between insertion vs harvest for the straight grafts (658 �� 68 vs 260 �� 42 mL/min, P < .05) were higher than for the Venaflo grafts (770 �� 107 vs 661 �� 284 mL/min, P = ns). To be able to compare the relation of the flow rates between the groups at implant and at explant, we calculated an index of the flow loss. The flow loss index (explantation flow �� 100/implantation flow) was 0.39 for the straight and 0.86 for the Venaflo grafts, respectively. A notable pseudointima on the wall of the ePTFE grafts developed in all animals. In addition, a marked neointimal hyperplasia was seen in the recipient vein wall directly opposite to the graft entrance region (Fig 5). The neointima showed a characteristic distribution across the vein <a href="https://en.wikipedia.org/wiki/Azastene">Azastene wall with the highest amount of intima present in the middle section of the hyperplasia (Fig 3). The mean total length of the hyperplastic response was 11.7 �� 4.2 mm for straight and 10.7 �� 3.3 mm for cuffed grafts (ns). However, the development of hyperplasia was more pronounced in the straight grafts. In the venous part of the ePTFE grafts, a varying degree of pseudointima formation was found. The highest amount of pseudointima was present in the cuffed section of the Venaflo grafts (Fig 6). The pseudointima development was statistically significantly higher in the hood portion (2.9 �� 0.6 mm) than in the anastomotic heel (2.5 �� 0.4 mm, P < .05).
Sign In or Register to comment.