No Abstract Available.
Chondrocytes* ; Phenotype*

Replantation after crush amputation has a relatively low success rate. Thrombus formation due to vessel and tissue trauma is considered as the principal cause of failure. In the laboratory and clinically, we have been tried to improve the post-anastomosis patency rate in crushed microvasculature. To accomplish this, we have usually used several anticoagulant drugs. Extracts from the leaves of Ginkgo biloba (EGb) have been used therapeutically for centuries. EGb exerts a number of pharmacologic actions. Eighty rats were control group and another 80 rats were treated with EGb 761. The femoral arteries underwent crush injury with an energy of 0.4J, and the vessles in each group were divided and anastomosed by a standard microsurgical technique. Each group was comprised as follows: (1) control group(A1,A2): group A1(n=40); intraluminal saline irrigation, group A2(n=40); intraluminal saline irrigation+heparin 40 u/ml(IV). (2) EGb 761 treated group(B1, B2): groupB1(n=40); intraluminal saline irrigation, group B2(n=40); intraluminal saline irrigation + heparin 40 u/ml(IV). At postoperative 14 days, the patency rates were; group A1 20%, group A2 77.5%, group B1 47.5%, group B2 92.5%. These results were interpreted as follows: the patency rate was significantly increased in the EGb 761-only treated group(p>0.01), the heparin-only treated group(p>0.01), and the EGb 761 and heparin-combined at crushed microvessel surgery. However the patency rate of the EGb-only treated group was significantly lower than that of the heparin-only treated group(p>0.01). And in the EGb 761 and heparin-combined treated group compared to the heparin-only treated group, there was some patency rate increase in the combined treated group, but there was no significant difference between them(p=0.060).
Amputation ; Animals ; Anticoagulants ; Femoral Artery ; Ginkgo biloba* ; Heparin ; Microvessels* ; Pharmacologic Actions ; Rats* ; Replantation ; Thrombosis

Late results of microvascular patency after crush or crush avulsion injury have been relatively poor. A key factor in the poor results may relate to the presence of damaged tissue, but the mechanism of this thrombus formation is still imcompletely understood. One current theory about the origin of thrombus after vessel trauma involves increased exposure of the subendothelial tissue to platelets that adhere and aggregate at the injury site, initiating thrombus formation. Most surgeons have usually used several anticoagulant drugs to prevent thrombosis for 2-3 weeks after trauma or microvascular repair. We thought that Ginkgo biloba extract (EGb 761), which has a number of pharmacologic actions, could promote microvasculature healing and prevent thrombosis. The femoral arteries of rats were dissected. Each group was as follows:-1. group A (n=10): intact group (not crushed vessel),2. group B (n=10); crushing injury (not EGb 761-treated group),3. group C (n=10); crushing injury (EGb 761-treated group). Group B and C underwent crush injury with the energy of 0.07J. We compared patency rate and histological examination. All arteries were patent at postoperative 14 days, and in histologic finding, group C (group with EGb 761 treatment among the crushed injury group) showed significant improvement of vascular endothelial and medial regeneration.
Animals ; Anticoagulants ; Arteries ; Femoral Artery ; Ginkgo biloba* ; Microvessels ; Pharmacologic Actions ; Rats ; Regeneration ; Thrombosis

No abstract available.
Female ; Mammaplasty*

No abstract available.
Breast Implants* ; Breast* ; Contracture* ; Pregnancy*

Anesthesia for the patients with mediastinal mass may be associated with significant respiratory and cardiovaacular complications due to compression of traeheobronchial trees, the pulmonary artery, heart and superior vena cava The authors present a case of a 6-year-old girl with a large mediastinal tumor located in anterior and superior mediaetinum. Preoperatively, the patient was asymptomatic and anesthesia was induced and maintained uneventfully. Operative finding was that 8 X 14 cm sized hemangioma was extended superiorly over thoracic outlet, posteriorly aorta and SVC, medially pericardium and right hilum and inferiorly right upper lung and pleura. Because difficulties in removal of the hemangioma were expected, exploratory thoracotomy was discontinued. On emergence, as soon as the patient was extubated due to irritability, the patient became cyanotic and was noticed bulging mass on right supraclavicular area, Intubation was attempted and during direct laryngoscopy, anesthesiologist also noticed a bulging mass in right oral cavity. Postoperatively, the patients airway was kept with endotracheal tube, but cyanosis appeared on the face and skin over the chest, but not below the abdomen. Bulging mass on right supraclavicular area, distension of neck vein and conjunctival edema were noticed only when the patient was crying or suctioned. Symptoms improved by deep sedation. We assumed that enlargement of hemangioma due to increased central blood volume occasionally compressed tracheobronchial tree and sup. vena cava when patient was irritable, crying and coughing. On 11th postoperative day, patient was transferred to the another hospital for the better treatment with endotracheal intubation.
Abdomen ; Airway Obstruction* ; Anesthesia ; Aorta ; Blood Volume ; Child ; Cough ; Crying ; Cyanosis ; Deep Sedation ; Edema ; Female ; Heart ; Hemangioma ; Humans ; Intubation ; Intubation, Intratracheal ; Laryngoscopy ; Lung ; Mouth ; Neck ; Pericardium ; Pleura ; Pulmonary Artery ; Skin ; Suction ; Thoracotomy ; Thorax ; Veins ; Vena Cava, Superior

PURPOSE: Bone and cartilage were manufactured by using tissue engineering of mesenchymal stem cell (MSC) which can differentiate into variety of cell types. MATERIAL AND METHOD: MSC was isolated and cultured from the rabbit weighing 500g, and it was seeded into PGA mesh and pre-cultured for 1 week with different TGF- beta 3 treated conditions. It was implanted into nude mice and tissues generated were recovered from 1, 2, 3, 4, 8 ,and 12 weeks respectively. Degree of bone and cartilage formation was analyzed with histology and immunohistochemistry assay. RESULT: Pre-culture condition with TGF- beta 3 treatment showed early start of chondrogenic differentiation, and degree of bone and cartilage formation was promoted as time passed. But both of the cases differentiated into complete bone after 12 weeks. CONCLUSION: The results show that pretreatment of TGF- beta 3 promotes the differentiation process in vivo condition under the in vivo system where MSC differentiate into bone via cartilage formation.
Animals ; Cartilage ; Immunohistochemistry ; Mesenchymal Stromal Cells* ; Mice ; Mice, Nude ; Tissue Engineering

Objective: To determine the characteristics of pediatric spinal cord injury (SCI) in South Korea from 1990 to 2019. Methods: This single-centered retrospective study included pediatric SCIs. Individuals were divided into the following five groups according to onset age: ≤5, 6–12, 13–14, 15–17, and 18–19 years. The severity of complete injury was graded according to the American Spinal Injury Association impairment scale A (AIS A). Incomplete injury was graded according to AIS B, C, and D. Pearson chi-square test was used for statistical analysis. Results: Of the 267 individuals included, 216 (80.9%) had traumatic SCIs (male-to-female ratio of 3.2:1), and 51 (19.1%) had non-traumatic SCIs (male-to-female ratio of 0.7:1). In the traumatic SCI group, 192 (88.9%) individuals were ≥15 years at the time of injury (males, 78.6%). The most common etiologies of traumatic SCIs, ranging from most to least common, were accidents related to motorcycles, falls, cars, and diving. In the non-traumatic SCI group, inflammatory (33.3%) and neoplastic (25.5%) etiologies were found to be the most common ones. Conclusion We found that traumatic SCIs incidence in the pediatric population was high, particularly in male individuals aged 15–19 years. The non-traumatic SCIs mostly cause paraplegia and incomplete injury. Therefore, it can be used as a basic data for the evaluation, treatment and prevention strategy of pediatric patients with SCI.

Nitric oxide (NO) has been considered as an important mediator in inflammatory phases and in loss of cartilage. In inflammatory arthritis, NO levels are correlated with disease activity and articular cartilage is able to produce large amounts of NO with the appropriate inducing factor such as cytokines. The old animals are shown to have a greater sensitivity to NO than young animals. This study evaluated the basal production of NO in normal and OA-affected chondroyctes from young and old patients and compared the levels of NO formation in response to IL-1beta. The results showed that the basal levels were 7-fold higher in old chondrocytes than those of young cells. However, the IL-1beta induced NO production was seen to decrease with age. Aminoguianidine (AG), a competitive inhibitor of iNOS, inhibited NO formation completely in both chondrocytes from young and old individuals. However, at the same concentration of AG it caused partial inhibition of NO and iNOS formation in chondrocytes from OA-affected individuals. In addition, although the IL-1beta induced NO production was much lesser than that of young chondrocytes, the inhibition of collagen production by IL-1beta was prominent in old chondrocytes and OA-affected chondrocytes. These results suggest that age-related differences in the regulation of NO production and collagen production, which may affect the ageing cells and osteoarthritic changes in some way.
Aging/*physiology ; Cartilage, Articular/*physiopathology ; Cells, Cultured ; Chondrocytes/*metabolism ; Collagen Type II/metabolism ; Enzyme Inhibitors/pharmacology ; Guanidines/pharmacology ; Human ; Interleukin-1/pharmacology ; Nitric Oxide/*biosynthesis ; Osteoarthritis/*metabolism

Nitric oxide (NO) has been considered as an important mediator in inflammatory phases and in loss of cartilage. In inflammatory arthritis, NO levels are correlated with disease activity and articular cartilage is able to produce large amounts of NO with the appropriate inducing factor such as cytokines. The old animals are shown to have a greater sensitivity to NO than young animals. This study evaluated the basal production of NO in normal and OA-affected chondroyctes from young and old patients and compared the levels of NO formation in response to IL-1beta. The results showed that the basal levels were 7-fold higher in old chondrocytes than those of young cells. However, the IL-1beta induced NO production was seen to decrease with age. Aminoguianidine (AG), a competitive inhibitor of iNOS, inhibited NO formation completely in both chondrocytes from young and old individuals. However, at the same concentration of AG it caused partial inhibition of NO and iNOS formation in chondrocytes from OA-affected individuals. In addition, although the IL-1beta induced NO production was much lesser than that of young chondrocytes, the inhibition of collagen production by IL-1beta was prominent in old chondrocytes and OA-affected chondrocytes. These results suggest that age-related differences in the regulation of NO production and collagen production, which may affect the ageing cells and osteoarthritic changes in some way.
Aging/*physiology ; Cartilage, Articular/*physiopathology ; Cells, Cultured ; Chondrocytes/*metabolism ; Collagen Type II/metabolism ; Enzyme Inhibitors/pharmacology ; Guanidines/pharmacology ; Human ; Interleukin-1/pharmacology ; Nitric Oxide/*biosynthesis ; Osteoarthritis/*metabolism