PURPOSE: The present study was intended to evaluate the effect of soldering techniques with infrared ray and gas torch under different gap distances (0.3 mm and 0.5 mm) on the tensile strength and surface porosity formation in Ni-Cr base metal alloy. MATERIALS AND METHODS: Thirty five dumbbell shaped Ni-Cr alloy specimens were prepared and assigned to 5 groups according to the soldering method and the gap distance. For the soldering methods, gas torch (G group) and infrared ray (IR group) were compared and each group was subdivided by corresponding gap distance (0.3 mm: G3 and IR3, 0.5 mm: G5, IR5). Specimens of the experimental groups were sectioned in the middle with a diamond disk and embedded in solder blocks according to the predetermined distance. As a control group, 7 specimens were prepared without sectioning or soldering. After the soldering procedure, a tensile strength test was performed using universal testing machine at a crosshead speed 1 mm/min. The proportions of porosity on the fractured surface were calculated on the images acquired through the scanning electronic microscope. RESULTS: Every specimen of G3, G5, IR3 and IR5 was fractured on the solder joint area. However, there was no significant difference between the test groups (P > .05). There was a negative correlation between porosity formation and tensile strength in all the specimens in the test groups (P < .05). CONCLUSION: There was no significant difference in ultimate tensile strength of joints and porosity formations between the gas-oxygen torch soldering and infrared ray soldering technique or between the gap distance of 0.3 mm and 0.5 mm.
Alloys ; Collodion ; Diamond ; Electronics ; Electrons ; Infrared Rays ; Joints ; Porosity ; Tensile Strength

Portal vein (PV) thrombosis (PVT) is a rare condition with development of thrombosis in the PV and its branches. Further extension to the splenic and superior mesenteric vein (SMV) causes intestinal infarction, with a reported mortality of up to 50%. A variety of treatments for PVT exist including anticoagulation, thrombolysis, surgical thrombectomy, insertion of shunts, bypass surgery, and liver transplantation. We experienced a case of successfully treated by surgical thrombectomy with direct thrombolysis into the thrombosed-PV and SMV. A 31-year-old male presented worsening abdominal pain for one week. Preoperative contrast enhanced computed tomography scan revealed complete PVT extending to splenic vein and SMV. The PV was accessed surgically and opened by thrombectomy; visual inspection confirmed proximal and distal flow. Urokinase was administered directly into the inferior mesenteric vein with successful decrease in thrombus burden. The complete angiography showed complete dissolution of thrombosis in PV and SMV.
Abdomen, Acute* ; Abdominal Pain ; Adult ; Angiography ; Humans ; Infarction ; Liver Transplantation ; Male ; Mesenteric Veins* ; Mortality ; Portal Vein ; Splenic Vein ; Thrombectomy* ; Thrombosis* ; Urokinase-Type Plasminogen Activator ; Venous Thrombosis

No abstract available.
Carcinoma, Hepatocellular* ; Recurrence*

Renal artery aneurysm (RAA) is uncommon, and the coexistence of an abdominal aortic aneurysm (AAA) is an extremely rare condition with potentially high life-threatening mortality in case of rupture. Aneurysms can be treated by endovascular intervention or open surgery. Although most of aneurysms are treated by endovascular intervention, open surgery is often necessary for RAAs associated with the proximal renal bifurcation or the branches in the distal renal arteries. We report a rare case of coexisting RAA with AAA treated by hybrid method, consisting of endovascular aneurysm repair for AAA and open surgery for RAA located adjacent to the distal branches of the renal artery.
Aneurysm* ; Aortic Aneurysm, Abdominal* ; Gallbladder Neoplasms* ; Humans ; Mortality ; Renal Artery* ; Rupture

No abstract available.
Drug Therapy* ; Humans ; Lung Neoplasms* ; Lung*

A rate com;lication of hysterectomy is complete prolapse and inversion of vagina. This can occur whether the hysterectomy was abdominal or vaginal and cystocele and/or enterocele is often associated with this condition. Traditionally, prolapse has been treated by surgery, the types of operation for prolapse are generally but not always, carried out through the vaginal rather than through the abdominal surgical route. We experienced five cases who had repair of posthysterectomy vaginal vault prolapse by transabdominal sacral colpopexy and report with brief review of literatures.
Cystocele ; Hernia ; Hysterectomy* ; Pelvic Organ Prolapse* ; Prolapse ; Vagina

No abstract available.
Female ; Mammals* ; Ovulation* ; Rupture*

The authors studied 54 patients (55 cases) of femoral shaft fractures treated by compression plate fixation and IM nailing from August 1986 to December 1991. The purpose of this study is to analyse comparatively the radiological and clinical results between the compression plate fixation and IM nailing in femoral shaft fracture of adult. The obtained results were as follows: 1. Among the 54 patients, the ratio of male and female was 44: 10, and the highest in cidence of age was between 3rd and 4th decades. 2. The main cause of injury was traffic accident in 38 cases. 3. The most common fracture type was B1-② in ten cases by AO-ASIF classification. 4. The mean duration of union was 13 weeks in compression plate fixation by the Koostra's criteria and the average 23 weeks in IM nailing by the Bjorens criteria. 5. The clinical result according to Margerl et al, was good in 25 cases (80.6%) with compression plate fixation and good in 20 cases (83.3%) with intramedullary fixation. 6. Complications of compression plate fixation were metal failure in 2 cases and deep wound infection in 1 case, and 1 case of femur neck fracture during operation and 1 case of metal failure in intramedullary fixation.
Accidents, Traffic ; Adult ; Classification ; Female ; Femoral Neck Fractures ; Fracture Fixation, Intramedullary ; Humans ; Male ; Wound Infection

In order to observe the differences in fixability and stability of the acetabular cup through the differences in cup size in relation to the size of acetabular reaming, we analyzed 75 cases of porous coated acetabular cup of Harris-Galante type which be followed up more that two years. All cases were divided into two group ; the first group (On line fit :45 cases) used with acetabular cup equal in size to the last reaming size and the second group (Press fit : 30 cases) used with acetabular cup 2mm larger than the last reaming size. For initial stability, all cases were fixed with acetabular screws. Both groups were analyzed for presence of gap, change of acetabular inclination, presence of radiolucent line, degree of displacement of vertical distance, stability and clinical results. The results were as follows; 1. The average Harris hip score was improved from 55.8 points preoperatively to 90.2 points postoperatively in the first group, from 56.9 points to 91.2 points in the second group, Clinical results are excellent in 39 cases, good in 4 cases, fair in 2 cases in the first group, and excellent in 29 cases and good in 1 case in the second group. 2. The gap between the acetabular cup and acetabulum was found initially at 17 zones in the first group but no gap at final follow up. In the second group, the gap was found at 23 zones and finally remained less that 1 mm gap was found at 3 cases in zone B1. 3. No radiologic instability of acetabular cup by Martell evaluation was noted in both 1st and 2nd group. Our data suggests that initial gap between acetabular cup and acetabulum in microporous coated acetabular cup were replaced with new bone and also, radiologic stability and good clinical results could be obtained in the second group used with acetabular cup 2 mm larger than the last reaming size.
Acetabulum ; Arthroplasty, Replacement, Hip ; Clinical Study ; Follow-Up Studies ; Hip

In case of submucosal tumor, adenoma and atypism, we can't frequently use the snare polypectomy for treatment of them. Adenoma and atypism are premalignant, so other therapeutic modalities are necessary for resection of them. We have perfortned endoscopic mueosectomy such as strip biopsy, and "O"ring ligation on various mucosal lesions of upper GI tract in 23 patients(11 men, l2 women) from June 1993 to December l994. Fourteen patients wbo had adenoma were followed up endoscopically for 6 months to 24 months(mean: 14 months). The results were as follows: 23 patients(27 lesions) were enrolled in this study. Mean age was 50.3(range 32-74 years). The method of mucosectomy was strip biopsy in 19 cases(21 lesions), and "O"ring ligation in 4 cases(6 lesions). The rate of complete resection was 88.9%. If adenomas were resected incompletely, we added a laser therapy. There was no recurrence except a case in which carcinoma was detected on the other site during follow-up. No serious compication occurred such as massive bleeding or perforation. Based on the above results, the endoscopic mucosectomy is considered to be a safe and effective modality in the treatment of the flat polyps of upper GI tract and could be used for prevention of gastric cancer.
Adenoma ; Biopsy ; Follow-Up Studies ; Hemorrhage ; Humans ; Laser Therapy ; Ligation ; Male ; Polyps ; Recurrence ; SNARE Proteins ; Stomach Neoplasms ; Upper Gastrointestinal Tract*