Biodegradable blends of poly(butylene adipate‐co‐terephthalate) and polyglycolic acid with enhanced mechanical, rheological and barrier performances

2021 ◽  
pp. 51285
Author(s):  
Jianing Shen ◽  
Kai Wang ◽  
Zhao Ma ◽  
Nai Xu ◽  
Sujuan Pang ◽  
...  
Keyword(s):  
Polyglycolic Acid ◽  
Biodegradable Blends

scholarly journals Wrapping the pancreas with a polyglycolic acid sheet before stapling reduces the risk of fluid collection on the pancreatic stump after distal pancreatectomy

2021 ◽  
Author(s):  
Ji Su Kim ◽  
Seoung Yoon Rho ◽  
Dong Min Shin ◽  
Munseok Choi ◽  
Chang Moo Kang ◽  
...  
Keyword(s):  
Pancreatic Fistula ◽  
Distal Pancreatectomy ◽  
Fluid Collection ◽  
International Study ◽  
Polyglycolic Acid ◽  
Previous Method ◽  
Tertiary Referral ◽  
Tertiary Referral Hospital ◽  
Pancreatic Stump ◽  
Resection Line

Abstract Background Postoperative pancreatic fistula (POPF) and postoperative fluid collection (POFC) are common complications after distal pancreatectomy (DP). The previous method of reducing the risk of POPF was the application of a polyglycolic acid (PGA) sheet to the pancreatic stump after cutting the pancreas with a stapler (After-stapling); the new method involves wrapping the pancreatic resection line with a PGA sheet before stapling (Before-stapling). The study aimed to compare the incidence of POPF and POFC between two methods. Methods Data of patients who underwent open or laparoscopic DPs by a single surgeon from October 2010 to February 2020 in a tertiary referral hospital were retrospectively analyzed. POPF was defined according to the updated International Study Group of Pancreatic Fistula criteria. POFC was measured by postoperative computed tomography (CT). Results Altogether, 182 patients were enrolled (After-stapling group, n = 138; Before-stapling group, n = 44). Clinicopathologic and intraoperative findings between the two groups were similar. Clinically relevant POPF rates were similar between both groups (4.3% vs. 4.5%, p = 0.989). POFC was significantly lesser in the Before-stapling group on postoperative day 7 (p < 0.001). Conclusions Wrapping the pancreas with PGA sheet before stapling was a simple and effective way to reduce POFC.

scholarly journals Complications of Poly-l-Lactic Acid and Polyglycolic Acid (PLLA/PGA) Osteosynthesis Systems for Maxillofacial Surgery: A Retrospective Clinical Investigation

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 889
Author(s):  
Yuhei Matsuda ◽  
Masaaki Karino ◽  
Tatsuo Okui ◽  
Takahiro Kanno
Keyword(s):  
Postoperative Complications ◽  
Clinical Investigation ◽  
Maxillofacial Surgery ◽  
Multivariate Logistic Regression Analysis ◽  
Polyglycolic Acid ◽  
Oral And Maxillofacial Surgery ◽  
Low Incidence ◽  
Adjusted Model ◽  
Pyriform Aperture ◽  
Plate System

Two second-generation PLLA/PGA bioresorbable osteosynthetic plate systems for oral and maxillofacial surgery are available in Japan. The two systems have different PLLA-PGA component ratios (RapidSorb®, 85:15; Lactosorb®, 82:18) and plate and screw shapes. We conducted a retrospective study to compare our clinical evaluation and examine the incidence of postoperative complications between the two plate systems. A retrospective survey was conducted in 148 patients (midfacial fracture/trauma (68.2%) and dentofacial deformity patients (31.8%); males (54.7%); median age, 37.5 years) treated using maxillofacial osteosynthetic plate systems. The complications included plate exposure (7.4%), infection, (2.7%), and plate breakage (0.7%). Multivariate logistic regression analysis showed a significant correlation between sex (female), plate system (Lactosorb®), number of plates, and pyriform aperture and periorbital sites of plate placement (p < 0.05). Additionally, the propensity score-adjusted model showed a significant correlation between Lactosorb® and postoperative complications (odds ratio 1.007 (95% confidence interval, 1.001–1.055), p < 0.01). However, the two plate systems showed a low incidence rate of complications, and the plate integration and survivability were similar using 2.0-mm or 1.5-mm resorbable plate regardless of the plate system. Our findings suggest that female sex and a greater number of plates are risk factors for postoperative complications, whereas pyriform aperture and periorbital plate placements reduce the risk.

scholarly journals In Vitro and In Vivo Biosafety Analysis of Resorbable Polyglycolic Acid-Polylactic Acid Block Copolymer Composites for Spinal Fixation

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 29
Author(s):  
Seung Kyun Yoon ◽  
Jin Ho Yang ◽  
Hyun Tae Lim ◽  
Young-Wook Chang ◽  
Muhammad Ayyoob ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Animal Experiments ◽  
Polymeric Materials ◽  
Polyglycolic Acid ◽  
Poly Lactic Acid ◽  
Skin Sensitization ◽  
Spinal Fixation ◽  
In Vivo Degradation

Herein, spinal fixation implants were constructed using degradable polymeric materials such as PGA–PLA block copolymers (poly(glycolic acid-b-lactic acid)). These materials were reinforced by blending with HA-g-PLA (hydroxyapatite-graft-poly lactic acid) and PGA fiber before being tested to confirm its biocompatibility via in vitro (MTT assay) and in vivo animal experiments (i.e., skin sensitization, intradermal intracutaneous reaction, and in vivo degradation tests). Every specimen exhibited suitable biocompatibility and biodegradability for use as resorbable spinal fixation materials.

scholarly journals Feasibility of a modified search, coagulation, and clipping method with and without the use of polyglycolic acid sheets and fibrin glue for preventing delayed bleeding after gastric endoscopic submucosal dissection

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Satoshi Abiko ◽  
Soichiro Oda ◽  
Akimitsu Meno ◽  
Akane Shido ◽  
Sonoe Yoshida ◽  
...  
Keyword(s):  
High Risk ◽  
Endoscopic Submucosal Dissection ◽  
Median Time ◽  
Fibrin Glue ◽  
Polyglycolic Acid ◽  
Low Risk ◽  
R0 Resection ◽  
Antithrombotic Agents ◽  
Delayed Bleeding ◽  
Submucosal Dissection

Abstract Background Methods have been developed for preventing delayed bleeding (DB) after gastric endoscopic submucosal dissection (GESD). However, none of the methods can completely prevent DB. We hypothesized that DB could be prevented by a modified search, coagulation, and clipping (MSCC) method for patients at low risk for DB and by combining the use of polyglycolic acid sheets and fibrin glue with the MSCC method (PMSCC method) for patients at high risk for DB (antibleeding [ABI] strategy). This study assessed the technical feasibility of this novel strategy. Method We investigated 123 lesions in 121 consecutive patients who underwent GESD in Kushiro Rosai Hospital between April 2018 and January 2020. The decision for continuation or cessation of antithrombotic agents was based on the Guidelines for Gastroenterological Endoscopy in Patients Undergoing Antithrombotic Treatment. Results Oral antithrombotic agents were administered to 28 patients (22.8%). The en bloc R0 resection rate was 98.4%. The MSCC method and the PMSCC method for preventing DB were performed in 114 and 9 lesions, respectively. The median time of the MSCC method was 16 min, and the median speed (the resection area divided by the time of method used) was 3.6 cm2/10 min. The median time of the PMSCC method was 59 min, and the median speed was 1.3 cm2/10 min. The only delayed procedural adverse event was DB in 1 (0.8%) of the 123 lesions. Conclusions The ABI strategy is feasible for preventing DB both in patients at low risk and in those at high risk for DB after GESD, whereas the PMSCC method may be necessary for reduction of time.

An Artificial Esophagus Constructed of Cultured Human Esophageal Epithelial Cells, Fibroblasts, Polyglycolic Acid Mesh, and Collagen

ASAIO Journal ◽  
1999 ◽  
Vol 45 (5) ◽  
pp. 502-508 ◽  
Author(s):  
HIROTAKA MIKI ◽  
NOBUTOSHI ANDO ◽  
SOJI OZAWA ◽  
MICHIO SATO ◽  
KOJI HAYASHI ◽  
...  
Keyword(s):  
Epithelial Cells ◽  
Polyglycolic Acid ◽  
Polyglycolic Acid Mesh ◽  
Artificial Esophagus ◽  
Esophageal Epithelial Cells
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