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Bioabsorbable Fibers for Medical Use
Published in Menachem Lewin, Jack Preston, Handbook of Fiber Science and Technology, 2017
Leakage from the anastomosis after operation often has a high mortality rate. Arndt et al. applied the Vicryl mesh graft (filament diameter 0.2 mm and pore size 0.5 mm) for protection of esophago-gastrostomy as shown in Fig. 23 [36]. The result is summarized in Table 21. It appears that protection of an anastomosis with Vicryl mesh can reduce the tension within and on the anastomotic site and can achieve adequate sealing of the anastomosis. No anastomotic dehiscence was seen in the patients, and none died of leakage from the anastomosis. Splenorrhaphy was also performed in six patients using the absorbable Dexon (PGA) mesh [37]. Figure 24 shows a case of spleen-penetrating injuries from a stab wound. A strip of PGA mesh was wrapped between the two injuries and sutures applied through the mesh, incorporating the wounds. The patient had an afebrile, uneventful postoperative course and was discharged on the fifth postoperative day. In all six cases, the procedure was accomplished without abscess formation, postoperative bleeding, or complications related to the use of the mesh.
The application of indocyanine green (ICG) and near-infrared (NIR) fluorescence imaging for assessment of the lymphatic system in reconstructive lymphaticovenular anastomosis surgery
Published in Expert Review of Medical Devices, 2021
Albert H. Chao, Steven A. Schulz, Stephen P. Povoski
Indocyanine green lymphangiography offers an additional assessment that is of use to microsurgeons, specifically intraoperative evaluation of the patency of lymphaticovenular anastomoses. In general, any anastomosis is subject to the potential for occlusion or obstruction. In microsurgery, this is most often due to technical error. Assessment of patency is critical, as a non-patent anastomosis is unlikely to yield any benefit, which typically can be corrected with surgical revision if it can be identified. Unlike microvascular anastomoses which have greater flow rates, it can be difficult to visually assess whether there is flow across a lymphaticovenular anastomosis due to the relatively slow rate of lymphatic flow and the clear quality of lymphatic fluid. Patency of lymphaticovenular anastomoses is confirmed by visualizing fluorescence cross the anastomoses.
Polyurethane/polycaprolactone membrane grafted with conjugated linoleic acid for artificial vascular graft application
Published in Science and Technology of Advanced Materials, 2020
Nam Tran, An Le, Minh Ho, Nhi Dang, Huong Ha Thi Thanh, Long Truong, Dai Phu Huynh, Nguyen Thi Hiep
In clinical practice, an alternative blood vessel or bypass graft were usually attached to existing vessels using anastomosis techniques with suture. Thus, the suture retention strength of the material is also a critical factor deciding its usability in surgical intervention. As shown in Table 2, when tested with 6–0 polypropylene thread – suture specialized for vascular graft surgery, the samples displayed a suture retention strength of approximately 2.05 N and there was insignificant difference (p > 0.05) between treated and non-treated samples.