• Journal of Chest Surgery
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• v.36 no.2
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• pp.63-72
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• 2003

Although a variety of synthetic vascular grafts are available in modern vascular surgery, no ideal prosthesis ha,4 yet been developed. Small-caliber vascular grafts with low flow, as used in the lower extremity, continue to become thrombosed at unacceptable rates. We have developed and evaluated the new antithrombogenic blood contacting surfaces in canine model. Material and Method: Two now antithrombogenic blood contacting surfaces(Polyvinylalcohol -Polyurethane(PVA-PU) blend and natural Graphite-polyurethane(G-PU) blend) have been developed and evaluated in canine model, using vascular grafts and patches. The luminal surfaces of the test vascular grafts(5 mm ID) were fabricated by dipping a glass rod in PVA-PU blend solution(50 % PVA) using phase separation method. Mongrel dogs of either sex weighing 18-22 kg were anesthetized by endotracheal intubation using halothane and their lungs were ventilated with a volume-cycled ventilator, Maintenance anesthesia with 0.5-1.0% halothane and supplemental oxygen was used. Two pairs were used for comparison in the bilateral femoral arteries for both vascular grafts(PVA-PU vs. PU) and vascular patches(G-PU vs. PU). Bilateral groin incisions were made and the arteries were exposed and clamped. After an excision of 1 cm of the artery between clamps, a grail of 2.5 cm in length was implanted end-to-end using 6-0 polypropylene suture. The vascular patch was implanted as a form of on-lay patch. Animals were sacrificed at 1, 2, 4, 6, 8 and 16 weeks for vascular grafts and 1, 2. 4 and 6 weeks for vascular patches. Result The vascular grafts of PVA-PU blends showed patent lumina in the 2 and 16 weeks animals, while those of PU showed a patent lumen in 2 weeks animal. PVA-PU graft of 16 weeks showed a fairly clean luminal surface. A light microscopic finding of this graft demonstrated good tissue infiltration through porosity, The animals with vascular patches showed patent arteries in both groups except 2 weeks animal. Scanning electron microscopy of the luminal surfaces of G-PU patches in 4 and 6 weeks animals showed endothelial cell covering with microvilli. PU patches showed qualitatively less endothelial cell covering. Conclusion: In conclusion, PVA-PU and G-PU blends can be a promising blood contacting surfaces for application in a synthetic vascualr graft. However, further animal study is needed to determine the real long-term effects of these methods of surface modifications.

• Journal of the Korean Society of Radiology
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• v.85 no.3
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• pp.668-675
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• 2024

Aortic anastomotic leak is an uncommon complication after ascending aortic replacement for acute aortic dissection. Redo-surgery is the traditional standard treatment despite high mortality and morbidity. Recently, endovascular treatment has been attempted as an alternative approach in a few case reports. Here, we present two cases of aortic anastomotic leak due to suture line dehiscence after aortic graft replacement for type A aortic dissection, which were successfully treated by coil with subsequent N-butyl cyanoacrylate embolization and an Amplatzer^TM vascular plug.

• Journal of Chest Surgery
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• v.37 no.2
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• pp.193-196
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• 2004

Benign gastrobronchial fistula (GBF) after Ivor Lewis operation is a very rare and serious complication. We describe a patient with GBF who was successfully managed on the single-stage repair, 15 months after the Ivor Lewis operation. After the division of the GBF, the bronchial and gastric defects were closed directly. The omental flap and the pedicled 5th. intercostal muscle flap were interposed between the closed defects. The literature of this subject is reviewed and discussed.

• The korean journal of orthodontics
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• v.28 no.1 s.66
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• pp.85-97
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• 1998

The purpose of this study was to observe the effects of sodium fluoride on the bony repair and regeneration processes after the rapid palatal expansion in the growing dogs. Eighteen dogs were divided into experimental and control groups. They were in the late mixed dentition. The rapid Palatal expansion was undertaken in all the animals($180^{\circ}$ turn/day) for ten days. The animals were sacrificed on 0, 15 and 45 days after the finish of expansion. One mg NaF/kg of body weight/day were given orally to the experimental group. Blood samples were drawn before and after expansion and the se겨m calcium, phosphate and alkaline phosphatase level were measured. The undecalcified bone section of midpalatal suture area was made, and observed under the light microscopy The results were as follows ; 1. The day after expansion, the infiltration of inflammatory cells were prominent and the new bone formation started at the edges of the two palatal plates bodering the midpalatal suture in both groups. Especially, the newly formed osteoid were very extensive and the osteoblasts lining the osteoid were very active in the experimental group. 2. At fifteen days after expansion, the active osteoblasts lining the osteold at the surface of trabecular bony spicules and active new bone formation were observed in the both groups. However, the cellular activity and new bone formation were more prominent In the experimental group. 3. At forty five days after expansion, the continuous osteoid and new bone formation and active osteoblasts were observed in the experimental group. But these phenomena were not observed in the control group. In the control group, the numerous osteoclasts were adjacent midpalatal suture and the bony remodeling process was begun. The serum alkaline phosphatase level was maintained highly in the experimental group, but decreased in the control. According to the above results, the author reached the conclusion that sodium fluoride has the stimulation effects on the osteoid production of the osteoblasts during the healing process after the rapid Palatal expansion more continuously.

• Journal of the korean academy of Pediatric Dentistry
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• v.29 no.3
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• pp.450-454
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• 2002

Laceration of soft palate and oropharynx is relatively common in children. Soft palate laceration has been reported patients of all ages, ranging from new born to geriatric patients. However, young children often place objects their mouth, they may fall on the object or receive a direct force on the object which then perforates the soft palate tissue. Most frequently affected site is the left supra-tonsillar area. Lesions are predominately in the soft palate with-out perforation. Linear and superficial wounds are frequent. A typical injury is the flat- U-, or V-shaped with apex directed anteriorly. In those cases without any through-and-through lacerations or any tissue loss, suture is not necessary. Furthermore, suture of the affected site may hinder wound healing. Healing of the wound should be complete by three weeks with minimal scarring. There have been reports of carotid artery injury due to soft palate laceration causing neurologic complications. For such reasons, traumatized child must be in close observation for 2-3days, and if symptoms of complication are noticed consultation with oromaxillofacial surgeons, E.N.T., or neurologist is required. These are two reports of boys 2 and 3 years of age who had soft palate laceration caused by a falling-down-in jury with an object in their mouth. They were treated non-surgically and neurologic evaluation was carried out for 1 week with complete healing.

• Journal of Chest Surgery
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• v.30 no.5
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• pp.528-532
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• 1997

After early surgical repair of ventricular septal rupture complicated by myocardial infarction, newly developed ventricular septal defects were discovered on the 7th and the 40th postoperative day in 2 cases. We reoperated these patients for closure of newly developed ventricular septal defects with Dacron patch successfully on the 77th and the loth day after discovery of those defects. From these results we conclude that early surgical rep ir for ruptured ventricular septum following myocardial infarction is an appropriate approach with low risk and that remnant or recurred ventricular septal defect can be corrected rather safely with proper myocardial preservation and unrestricted application of intraaortic balloon pump or other ventricular assist device.

• Journal of Chest Surgery
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• v.30 no.3
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• pp.344-347
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• 1997

A 49-year-old female patient who had obstruction of superior vents cave(SVC) with SVC syndrome was successfully managed by bypass operation of superior vents cava with spiral vein graft. A composite spiral vein graft was placed between the right innominate vein and the right atrium to bypass the occluded SVC. The graft was constructed from the patient's own saphenous vein, which was split longitudinally and wrapped around a stent in spiral fashion and the edges of the vein were sutured together to form a large autogenous conduit. The patient was relieved o SVC obstructive symtoms and signs and discharged 21 days postoperatively without any complication.

• Journal of Chest Surgery
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• v.29 no.5
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• pp.554-558
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• 1996

A case of distal aortopulmonary septal defect associated with aortic origin of right pulmonary ar- tery, patent ductus arteriosus and hypoplasia of aortic isthmus in a 50-day-old female infant is presented. Ligation of patent ductus arteriosus, resection and end-to-end anastomosis of hypoplasia of aortic isthmus, implantation of rlght pulmonary artery to main pulmonary artery and autologous peri- cardial patch repair of aortopulmonary septal defect were performed under cardiopulmonary bypass as one-stage approach. Deep hypothermic total circulatory arrest was applied during repair of hypoplasia of aortic isthmus. The p stoperative course was uneventful.

• Journal of Korean Orthopaedic Sports Medicine
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• v.6 no.1
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• pp.57-65
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• 2007

Purpose: The purpose of this study was to evaluate the clinical result of arthroscopic treatments by using suture anchors or suture anchors combined with cannulated screw in the greater tuberosity fracture of the proximal humerus fracture. Materials and Methods: From March 2004 to March 2006 we have used suture anchor or suture anchors combined with cannulated screw for 6 cases of the greater tuberosity fracture which include displaced fractures, comminuted fractures and minimally displaced fractures with comcomittent lesions such as rotator cuff tears, stiffness and labral lesion. In this retrospective study, we analyzed the clinical outcomes by using the range of motion, University of California at Los Angeles shoulder rating scale (UCLA) and the ASES shoulder index score (ASES) in the average 6 months follow up. Results: At the last follow up, average range of motion was improved to 154.3 degree, 145.8 degree, 32.6 degree and L1 vertebrae in each forward flexion, abduction, external rotation and internal rotation. Clinically the UCLA rating scales improved to 31.5 and the ASES shoulder index score (ASES) improved to 93.6 in the last follow up. Conclusion: Arthroscopic treatments by using suture anchor or suture anchors combined with cannulated screw in the greater tuberosity fracture of the proximal humerus fracture is an alternative treatment of the greater tuberosity fracture of the proximal humerus fracture.

• Journal of Dental Rehabilitation and Applied Science
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• v.35 no.4
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• pp.253-259
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• 2019

In this case report, gingival recession of the mandibular anterior teeth was treated with a laterally closed tunnel technique. Two patients had altered the inclination of mandibular anterior tooth during past orthodontic treatment and had periodontal thin biotype. The recipient site was formed by tunneling method, and the connective tissue graft obtained from the palatal side was placed in the tunnel, and the margins of flap were gathered at the center of the root and sutured. Despite the thin periodontal biotype, the root coverage was successfully obtained, keratinized gingiva was increased, and aesthetics were achieved by harmonizing with surrounding tissues in terms of shape and color.