The author carried out a study on the effectiveness of the boric acid as a stomach poison for German cockroach control from July to September 1971. The test was performed by the feeding method under conditions of 20 C and 80 per cent relative humidity. The baits were composed of one control group and five different combination groups with boric acid and sugar as follows. 10 g sugar only(control group), 1 g powedered boric acid to 9 g sugar(1:9 poison baits), 2 g powdered boric acid to 8 g sugar(2:8 poison baits), 4 g powdered boric acid to 6 g sugar(4:6 poison baits), 5 g powdered boric acid to 5g sugar(5:5 poison baits), 10 g powdered boric acid only (10:0 poison baits). The insects were composed of 360 female adult German cockroaches collected by traps at the kitchens of restaurants and house holds in Seoul City. The results were as follows: The total mortality by poison baits in 72 hours after treatment were: 44.3 per cent by 1:9 poison baits , 79.4 per cent by 2: poison baits , 96.7 per cent by 4:6 poison baits(the most effective poison baits), 88.3 per cent by 5:5 poison baits, 91.1 per cent by 10:0 poison baits. The peak mortality by the treatment hours were: Up to 21 hours: 23.3 per cent by 5:5 poison baits, 20.0 per cent by 10:10 poison baits, From 24 to 48 hours: 71.1 per cent by 4:6 poison baits, 55.6 per cent by 10:0 poison baits, From 48 to 72 hours: 21.9 per cent by 2:8 poison baits, 19.6 per cent by 1:9 poison baits. The most effective treatment hours was from 24 to 48 hours.
parasitology-arthropoda-cockcroach ; Blattella germanica ; chemotherapy ; boric acid

During the period from May to October 1969, the authors carried out a series of tests with the aim to ascertain the present status of susceptibility of adult cockraoches to various insecticides. The tests on the susceptibility of cockroaches to dieldrin, D.D.V.P., Diazinon; Dibrom, Malathion and lindane were performed with the topical application and the residual film methods under the conditions of 26 degrees C and 80% of relative humidity. The insects tested were collected from Seoul City and were reared at the laboratory. Some of the important results so far obtained can be summarized as follows: The median lethal doses (LD(50)) of the five insecticides against female adult cockroaches were: 0.4 ug/roach or 4.02 ug/body weight (gm) by Dieldrin, 0.29/roach or 2.88 ug/body weight (gm) by D.D.V.P., 0.29 ug/roach or 2.96 ug/body weight (gm) by Diazinon, 0.54 ug/roach or 5.37 ug/body weight (gm) by Dibrom, and 2.96 ug/roach or 29.60 ug/body weight (gm) by Malathion. And those against male adult cockroaches were: 0.18 ug/roach or 3.29 ug/body weight (gm) by Dieldrin, 0.27 ug/roach or 4.89 ug/body weight (gm) by D.D.V.P., 0.16 ug/roach or 2.91 ug/body weight (gm) by Diazinon, 0.49 ug/roach or 8.97 ug/body weight (gm) by Dibrom, and 1.32 ug/roach or 24.19 ug/body weight (gm) by Malathion. The level of susceptibility of adult cockroaches to the insecticides tested was 1.0-1.6 times higher as compared with the results obtained on the Japanese Takashi strain. The median knockdown times (LT(50)) of the female adult cockroaches by insectcides at 1% concentration of 3 mg per square centimetre were 1.82 hours by Malathion, 1.36 hours by Diazinon, 0.56 hours by Lindane, 0.50 hours by Dibrom, and 2.56 hours by D.D.V.P. A marked difference was seen to exist between the males and the females. The female cockroaches were more resistant than the male to Dieldrin, Diazinon and Malathion.
parasitology-arthropoda-cockcroach-Blattella germanica ; chemotherapy ; Dieldrin ; D.D.V.P. ; Diazinon ; Dibrom ; Malathion ; lindane ; resistance

STUDY DESIGN: Authors experienced three cases of malignant schwannoma arising from multiple neurofibromatosis and invading the vertebrae. OBJECTIVE: To report treatment results and preventive idea in three cases of malignant schwannoma transformed from neurofibromatosis within the retroperifoneal area and invading the vertebrae. SUMMARY OF BACKGROUND DATA: The patients with neurofibromatosis are clearly at increased risk to develop the malignant schwannoma. A review of Korean literature revealed no such cases. RESULTS: The first case presented in the L4 body and was treated by surgical excision and chemotherapy, but she expired due to secondary metastasis in six months after diagnosis. The second case was treated by diagnostic biopsy and chemotherapy with adriamycin, ifosfamide, DTIC, mesna. He eventually lived for 14 months. After a diagnostic biopsy, the third case died due to lung metastasis before we could begin the treatment. CONCLUSION: We recommend that neurofibromatsis patients be regularly followed-up and if necessary, CT examination of spine or abdomen should be done. If a malignant schwannoma is detected, then early treatment can be started.
Abdomen ; Biopsy ; Dacarbazine ; Diagnosis ; Doxorubicin ; Drug Therapy ; Humans ; Ifosfamide ; Lung ; Mesna ; Neoplasm Metastasis ; Neurilemmoma* ; Neurofibromatoses ; Spine*

In the summer of 1969 from July through October, authors carried out a study of susceptibility in adult female bed bug(Cimex lectularius) in order to ascertain any development of resistance to insecticides in Korea. The test to DDT and Dieldrin was performed in laboratory by the continuous exposure of residues method, with standard impregnated paper used for adult mosqitoes. Some results so far obtained can be summarised as follows: LC(50) were 2.839% in DDT and 0.167% in Dieldrin. The resistance has been arisen 2.4-2.9 times in DDT and 1.6-2.4 times in Dieldrin as compared with London laboratory strain, but they were susceptible 1.4 times in DDT and 180 times in Dieldrin as compared to Israel resistance strain.
parasitology-arthropodology-bed bug-Cimex lectularius ; prevention ; chemotherapy ; resistance ; DDT ; dieldrin

Diagnostic angiographic evaluations were done in 33 patients with gastrointestinal bleeding for recent 5 yearsat Department of Radilogy, Seoul National University hospital. On 11 patients of them, therapeutic interventionalprocedures were made and the results were analysed. 1. In a total of 33 cases, there were 18 cases of upper GIbleeding and 15 cases of lower GI bleeding. The most frequent causes were peptic ulcer in the former andintestinal typhoid fever in the latter. 2. Bleeding sites were localized angiographically in 28 cases, so thedetection rate was 85%. Four of the five angiographically negative cases were lower GI bleeding cases. 3. The mostfrequent bleeding site was left gastric artery(7/33). The next was ileocecal branch of superior mesentericartery(6/33). 4. Among the 11 interventional procedures, Gelfoam embolization was done in 7 cases and Vasopressininfusion was tried in 4 cases. They were successful in 4 and 3 cases, suggesting 57% and 47% success ratesrespectively.
Diagnosis ; Gelatin Sponge, Absorbable ; Hemorrhage ; Humans ; Peptic Ulcer ; Seoul ; Typhoid Fever

Osteonecrosis of the femoral head usually affects young or middle-aged adults and frequently leading to femoral head collapse and hip arthritis. This review reports the updated treatments of the disease.

Intermittent pneumatic compression (IPC) device is an effective method to prevent deep vein thrombosis. This method has been known to be safe with very low rate of complications compared to medical thromboprophylaxis. Therefore, this modality has been used widely in patients who underwent a hip fracture surgery. We report a patient who developed extensive bullae, a potentially serious skin complication, beneath the leg sleeves during the use of IPC device after hip fracture surgery.
Aged, 80 and over ; Blister/*etiology/pathology ; Female ; Hip Fractures/*surgery ; Humans ; Intermittent Pneumatic Compression Devices/*adverse effects ; *Postoperative Complications ; Venous Thromboembolism/prevention & control

Through retrospective Jeju-cohort study at 2005, we found low rates of detection of osteoporosis (20.1%) and medication for osteoporosis (15.5%) in those who experienced hip fracture. This study was to determine the orthopedic surgeons' awareness could increase the osteoporosis treatment rate after a hip fracture and the patient barriers to osteoporosis management. We prospectively followed 208 patients older than 50 yr who were enrolled for hip fractures during 2007 in Jeju-cohort. Thirty four fractures in men and 174 in women were treated at the eight hospitals. During the study period, orthopedic surgeons who worked at these hospitals attended two education sessions and were provided with posters and brochures. Patients were interviewed 6 months after discharge using an evaluation questionnaire regarding their perceptions of barriers to osteoporosis treatment. The patients were followed for a minimum of one year. Ninety-four patients (45.2%) underwent detection of osteoporosis by dual energy x-ray absorptiometry and 67 (32.2%) were prescribed medication for osteoporosis at the time of discharge. According to the questionnaire, the most common barrier to treatment for osteoporosis after a hip fracture was patients reluctance. The detection and medication rate for osteoporosis after hip fracture increased twofold after orthopedic surgeons had attended the intervention program. Nevertheless, the osteoporosis treatment rate remains inadequate.
Absorptiometry, Photon ; Aged ; Aged, 80 and over ; *Clinical Competence ; Cohort Studies ; Female ; Health Knowledge, Attitudes, Practice ; Hip Fractures/*surgery/therapy ; Humans ; Male ; Middle Aged ; Orthopedic Procedures ; Orthopedics/*education ; Osteoporosis/*diagnosis/*drug therapy/therapy ; Patient Acceptance of Health Care ; *Physician's Practice Patterns ; Prospective Studies ; Questionnaires ; Withholding Treatment

BACKGROUND: Various osteotomies have been introduced to treat osteonecrosis of the femoral head. The purpose of this study was to compare surgical parameters, postoperative limb length discrepancy, and minimum 5-year clinical and radiological results between transtrochanteric curved varus osteotomy (TCVO) and transtrochanteric rotational osteotomy (TRO) for osteonecrosis of the femoral head. METHODS: From 2004 to 2009, 103 consecutive TROs (97 patients) followed by 72 consecutive TCVOs (64 patients) were performed for the treatment of osteonecrosis of the femoral head. Of these, 85 patients (91 hips) in the TRO group and 58 patients (65 hips) in the TCVO group completed minimum 5-year clinical and radiological follow-up. The Kaplan-Meier product-limit method was used to estimate survival. RESULTS: The TCVO group had shorter operation time (p < 0.05) and less estimated blood loss (p = 0.026). Postoperative collapse developed in 26 hips (28.6%) in the TRO group and 7 hips (10.8%) in the TCVO group (p = 0.007). Osteophyte formation was observed in 34 hips (37.4%) in the TRO group and 13 hips (20%) in the TCVO group (p = 0.020). Fifteen hips (16.5%) in the TRO group and 7 hips (10.8%) in the TCVO group underwent conversion total hip arthroplasty (THA). The survival rate at 9 years with radiographic collapse as the endpoint was 68.7% (95% confidence interval [CI], 58.1% to 79.3%) in the TRO group, and 84.7% (95% CI, 71.5% to 97.9%) in the TCVO group. With conversion to THA as the endpoint, the survival rate was 82.2% (95% CI, 73.1% to 91.3%) in the TRO group and 89.2% (95% CI, 81.7% to 96.7%) in the TCVO group. CONCLUSIONS: The comparison indicates that TCVO was better than TRO in terms of surgical parameters including operation time and estimated blood loss while the 9-year survival rates were similar.
Arthroplasty, Replacement, Hip ; Extremities ; Femur Head ; Follow-Up Studies ; Head* ; Hip ; Humans ; Kaplan-Meier Estimate ; Osteonecrosis* ; Osteophyte ; Osteotomy* ; Survival Rate

OBJECTIVES: Nonagenarians with hip fractures represent a special group of people because of their advanced age and co-morbidities. We evaluated mortality after hip fractures in nonagenarians. METHODS: Fifty-one patients were studied over a 2-year period. There were 39 female and 12 male patients. Twenty seven patients sustained an intertrochanteric fracture of the femur, 24 suffered from femoral neck fracture. The American Society of Anaesthetists (ASA) score of II was the most frequent among 51. Forty-one of them had one or more co-morbidities. Patient review was done 2 years after the fracture. RESULTS: The mortality rate at one year was 53.4% in men, and 15.7% in women. After multivariate analysis, the type of fracture (intertrochanteric fracture) was identified as a risk factor for one-year mortality (P = 0.025). CONCLUSION: The outcome in nonagenarians with hip fractures is poor due to the high rates of mortality, especially in men, and this could be informed to patients and their families before hip fracture surgery.
Aged, 80 and over ; Female ; Femoral Neck Fractures ; Femur ; Hip ; Hip Fractures ; Humans ; Male ; Multivariate Analysis ; Risk Factors