1.Interstitial Vaginal Needle Implantation in Gynecological Tumors: Design and Construction of Applicator.
Seunghee KANG ; Mison CHUN ; Haejin KANG ; Chil JUNG ; Jeong Hyae SON
The Journal of the Korean Society for Therapeutic Radiology and Oncology 1998;16(2):167-175
PURPOSE: It is not a simple task to achieve the ideal isodose curve with a standard vaginal applicator or single plane needle impant in the paravaginal tissue when primary or recurrent gynecological neoplasms (cervical cancers, vaginal cancers and vulvar cancers) are treated as a boost following external beam radiotherapy. The authors introduce the development and construction of a simple, inexpensive, customized applicator for volume implant to maximize the radiation dose to the tumor while minimizing the dose to the rectum and the bladder. MATERIALS AND METHODS: Nine patients underwent Ir-192 transperineal interstitial implantation for either recurrent (5 cases) or primary (3 cases) cervical cancers or primary vaginal cancer (1 case) between August 1994 and February 1998 at Ajou university hospital. First 3 cases were performed with a single plane implant guided by digital palpation. Because of inadequate isodose coverage in the tumor volume in first 3 cases, we designed and constructed interstitial vaginal applicator for volume implant to improve tumor dose distribution and homogeneity while sparing the surrounding normal tissue. Our applicators consist of vaginal obturator and perineal template that made of the clear acrylamide and dental mold material (Provil ). The applicators were customized individually according to the tumor size and its location. Both HDR and LDR irradiation were given with these applicators accomodating 6 Fr needles (Microselectron, Nucletron). The pretreatment planning prior to actual implant was performed whenever possible. RESULTS: Needles can be inserted easily and evenly into the tumor volume through the holes of templates, requiring less efforts and time for the implant prodecure. Our applicators made of materials available from commercial vendors. These have an advantage that require easy procedure, and spend relatively short time to construct. Also it was possible to fabricate applicators to individualize according to the tumor size and its location and to achieve the ideal isodose coverage. We found an accurate needle arrangement and ideal dose distribution through the CT scan that was obtained in 3 cases after needle implant. Three patients with primary cervical and vaginal cancers were controlled locally at final follow up. But all recurrent cases failed to do so. CONCLUSION: The authors introduce inexpensive, simple interstitial vaginal templates which were self-designed and constructed using materials available from commercial vendors such as acrylamide and dental mold material (Provil ).
Acrylamide
;
Brachytherapy
;
Commerce
;
Follow-Up Studies
;
Fungi
;
Humans
;
Needles*
;
Palpation
;
Radiotherapy
;
Rectum
;
Tomography, X-Ray Computed
;
Tumor Burden
;
Urinary Bladder
;
Vaginal Neoplasms
2.Interstitial Vaginal Needle Implantation in Gynecological Tumors: Design and Construction of Applicator.
Seunghee KANG ; Mison CHUN ; Haejin KANG ; Chil JUNG ; Jeong Hyae SON
The Journal of the Korean Society for Therapeutic Radiology and Oncology 1998;16(2):167-175
PURPOSE: It is not a simple task to achieve the ideal isodose curve with a standard vaginal applicator or single plane needle impant in the paravaginal tissue when primary or recurrent gynecological neoplasms (cervical cancers, vaginal cancers and vulvar cancers) are treated as a boost following external beam radiotherapy. The authors introduce the development and construction of a simple, inexpensive, customized applicator for volume implant to maximize the radiation dose to the tumor while minimizing the dose to the rectum and the bladder. MATERIALS AND METHODS: Nine patients underwent Ir-192 transperineal interstitial implantation for either recurrent (5 cases) or primary (3 cases) cervical cancers or primary vaginal cancer (1 case) between August 1994 and February 1998 at Ajou university hospital. First 3 cases were performed with a single plane implant guided by digital palpation. Because of inadequate isodose coverage in the tumor volume in first 3 cases, we designed and constructed interstitial vaginal applicator for volume implant to improve tumor dose distribution and homogeneity while sparing the surrounding normal tissue. Our applicators consist of vaginal obturator and perineal template that made of the clear acrylamide and dental mold material (Provil ). The applicators were customized individually according to the tumor size and its location. Both HDR and LDR irradiation were given with these applicators accomodating 6 Fr needles (Microselectron, Nucletron). The pretreatment planning prior to actual implant was performed whenever possible. RESULTS: Needles can be inserted easily and evenly into the tumor volume through the holes of templates, requiring less efforts and time for the implant prodecure. Our applicators made of materials available from commercial vendors. These have an advantage that require easy procedure, and spend relatively short time to construct. Also it was possible to fabricate applicators to individualize according to the tumor size and its location and to achieve the ideal isodose coverage. We found an accurate needle arrangement and ideal dose distribution through the CT scan that was obtained in 3 cases after needle implant. Three patients with primary cervical and vaginal cancers were controlled locally at final follow up. But all recurrent cases failed to do so. CONCLUSION: The authors introduce inexpensive, simple interstitial vaginal templates which were self-designed and constructed using materials available from commercial vendors such as acrylamide and dental mold material (Provil ).
Acrylamide
;
Brachytherapy
;
Commerce
;
Follow-Up Studies
;
Fungi
;
Humans
;
Needles*
;
Palpation
;
Radiotherapy
;
Rectum
;
Tomography, X-Ray Computed
;
Tumor Burden
;
Urinary Bladder
;
Vaginal Neoplasms
3.Diarylpropionitrile inhibits melanogenesis via protein kinase A/cAMP-response element-binding protein/microphthalmiaassociated transcription factor signaling pathway in α-MSHstimulated B16F10 melanoma cells
Hyun Jeong LEE ; Sungkwan AN ; Seunghee BAE ; Jae Ho LEE
The Korean Journal of Physiology and Pharmacology 2022;26(2):113-123
Diarylpropionitrile (DPN), a selective agonist for estrogen receptor β(ERβ), has been reported to regulate various hormonal responses through activation of ERβ in tissues including the mammary gland and brain. However, the effect of DPN on melanogenesis independent of ERβ has not been studied. The aim of this study is to examine the possibility of anti-melanogenic effect of DPN and its underlying mechanism. Melanin contents and cellular tyrosinase activity assay indicated that DPN inhibited melanin biosynthesis in alpha-melanocyte stimulating hormonestimulated B16F10 melanoma cell line. However, DPN had no direct influence on in vitro tyrosinase catalytic activity. On the other hand, 17β-estradiol had no effect on inhibition of melanogenesis, suggesting that the DPN-mediated suppression of melanin production was not related with estrogen signaling pathway. Immunoblotting analysis showed that DPN down-regulated the expression of microphthalmiaassociated transcription factor (MITF), a central transcription factor of melanogenesis and its down-stream genes including tyrosinase, tyrosinase-related protein (TRP)-1, and TRP-2. Also, DPN attenuated the phosphorylation of protein kinase A (PKA) and cAMP-response element-binding protein (CREB). Additionally, DPN suppressed the melanin synthesis in UVB-irradiated HaCaT conditioned media culture system suggesting that DPN has potential as an anti-melanogenic activity in physiological conditions. Collectively, our data show that DPN inhibits melanogenesis via downregulation of PKA/CREB/MITF signaling pathway.
4.Disease burden and epidemiologic characteristics of injury in Korea
Seunghee JUN ; Hyunjin PARK ; Ui Jeong KIM ; Hyesook PARK
Journal of the Korean Medical Association 2022;65(10):649-654
Injury is a major public health concern because it is a major cause of death and may cause lifelong disabilities. New environmental risk factors, such as extreme climates, are now emerging, and the vulnerable elderly population is rapidly growing. Therefore, understanding the epidemiological characteristics and trends of injury is necessary to establish preventive policies and actions.Current Concepts: Injury accounts for 13.3% of the disease burden in Korea, which is higher than the global proportion (9.8%). In addition, in 2019, the life years lost due to injury in Korea was 973,030, which is also higher than in the other 37 countries of the Organisation for Economic Co-operation and Development (OECD). Mortality due to injury has shown a downward trend, while mortality due to falls has shown an upward trend since 2010. Mortality due to injury in Korea is higher than the OECD average, and mortality due to intentional self-harm was the highest. Intentional self-harm accounts for 50.8% of deaths due to injury. In hospitalization due to injury, falls account for the largest proportion (38.5%) and frequently occur in older adults.Discussion and Conclusion: Although the mortality rate of injury is decreasing, the magnitude of injury in Korea is still higher than the OECD average. We hope these findings are used as basic data to find a targeted approach for injury prevention.
5.Non-carbapenem Drugs for Patients with Bacteremia caused by Extended-Spectrum β-Lactamase-Producing Enterobacteriaceae: Piperacillin-Tazobactam
Hyunjoo OH ; Seunghee LEE ; Misun KIM ; Sang Taek HEO ; Jeong Rae YOO
Korean Journal of Medicine 2024;99(3):149-157
Background/Aims:
Carbapenems are recommended for treating bacteremia caused by extended-spectrum β-lactamase (ESBL) producing Enterobacteriaceae (ESBL-E). However, this has resulted in a significant rise in the utilization of carbapenems in cases of ESBL-E infection. We evaluated the clinical outcomes of patients with ESBL-E bacteremia treated with non-carbapenem antimicrobials.
Methods:
We conducted a retrospective case-control study of a cohort of patients with documented ESBL-E bacteremia from January 2021 to December 2021. The patients were divided into two groups according to whether they received non-carbapenem or carbapenem therapy. The rates of treatment failure, 30-day mortality and microbiologic failure, and the durations of hospitalization and of antimicrobial therapy were compared between the two groups. Antimicrobial susceptibility testing and phenotypic identification of ESBL-E were performed using the Vitek 2 system.
Results:
Of 118 patients with ESBL-E bacteremia, 54 received non-carbapenem drugs (non-carbapenem group [NCG]) and 64 received carbapenems (carbapenem group [CG]). Treatment failure at 30 days occurred in 16.7% of the patients in the NCG and in 18.8% in the CG (p = 0.65). The 30-day mortality rate was 14.8% in the NCG and 17.2% in the CG (p = 0.63). Extra-urinary tract infection and prior antimicrobial therapy within 30 days were risk factors for treatment failure in patients with ESBL-E bacteremia. The clinical outcomes did not differ significantly between the two groups, challenging the prevailing preference for carbapenems in the treatment of ESBL-E bacteremia.
Conclusions
Non-carbapenem antimicrobials such as piperacillin/tazobactam are recommended for patients with mild ESBL-E bacteremia in South Korea.
6.Non-carbapenem Drugs for Patients with Bacteremia caused by Extended-Spectrum β-Lactamase-Producing Enterobacteriaceae: Piperacillin-Tazobactam
Hyunjoo OH ; Seunghee LEE ; Misun KIM ; Sang Taek HEO ; Jeong Rae YOO
Korean Journal of Medicine 2024;99(3):149-157
Background/Aims:
Carbapenems are recommended for treating bacteremia caused by extended-spectrum β-lactamase (ESBL) producing Enterobacteriaceae (ESBL-E). However, this has resulted in a significant rise in the utilization of carbapenems in cases of ESBL-E infection. We evaluated the clinical outcomes of patients with ESBL-E bacteremia treated with non-carbapenem antimicrobials.
Methods:
We conducted a retrospective case-control study of a cohort of patients with documented ESBL-E bacteremia from January 2021 to December 2021. The patients were divided into two groups according to whether they received non-carbapenem or carbapenem therapy. The rates of treatment failure, 30-day mortality and microbiologic failure, and the durations of hospitalization and of antimicrobial therapy were compared between the two groups. Antimicrobial susceptibility testing and phenotypic identification of ESBL-E were performed using the Vitek 2 system.
Results:
Of 118 patients with ESBL-E bacteremia, 54 received non-carbapenem drugs (non-carbapenem group [NCG]) and 64 received carbapenems (carbapenem group [CG]). Treatment failure at 30 days occurred in 16.7% of the patients in the NCG and in 18.8% in the CG (p = 0.65). The 30-day mortality rate was 14.8% in the NCG and 17.2% in the CG (p = 0.63). Extra-urinary tract infection and prior antimicrobial therapy within 30 days were risk factors for treatment failure in patients with ESBL-E bacteremia. The clinical outcomes did not differ significantly between the two groups, challenging the prevailing preference for carbapenems in the treatment of ESBL-E bacteremia.
Conclusions
Non-carbapenem antimicrobials such as piperacillin/tazobactam are recommended for patients with mild ESBL-E bacteremia in South Korea.
7.Non-carbapenem Drugs for Patients with Bacteremia caused by Extended-Spectrum β-Lactamase-Producing Enterobacteriaceae: Piperacillin-Tazobactam
Hyunjoo OH ; Seunghee LEE ; Misun KIM ; Sang Taek HEO ; Jeong Rae YOO
Korean Journal of Medicine 2024;99(3):149-157
Background/Aims:
Carbapenems are recommended for treating bacteremia caused by extended-spectrum β-lactamase (ESBL) producing Enterobacteriaceae (ESBL-E). However, this has resulted in a significant rise in the utilization of carbapenems in cases of ESBL-E infection. We evaluated the clinical outcomes of patients with ESBL-E bacteremia treated with non-carbapenem antimicrobials.
Methods:
We conducted a retrospective case-control study of a cohort of patients with documented ESBL-E bacteremia from January 2021 to December 2021. The patients were divided into two groups according to whether they received non-carbapenem or carbapenem therapy. The rates of treatment failure, 30-day mortality and microbiologic failure, and the durations of hospitalization and of antimicrobial therapy were compared between the two groups. Antimicrobial susceptibility testing and phenotypic identification of ESBL-E were performed using the Vitek 2 system.
Results:
Of 118 patients with ESBL-E bacteremia, 54 received non-carbapenem drugs (non-carbapenem group [NCG]) and 64 received carbapenems (carbapenem group [CG]). Treatment failure at 30 days occurred in 16.7% of the patients in the NCG and in 18.8% in the CG (p = 0.65). The 30-day mortality rate was 14.8% in the NCG and 17.2% in the CG (p = 0.63). Extra-urinary tract infection and prior antimicrobial therapy within 30 days were risk factors for treatment failure in patients with ESBL-E bacteremia. The clinical outcomes did not differ significantly between the two groups, challenging the prevailing preference for carbapenems in the treatment of ESBL-E bacteremia.
Conclusions
Non-carbapenem antimicrobials such as piperacillin/tazobactam are recommended for patients with mild ESBL-E bacteremia in South Korea.
8.Non-carbapenem Drugs for Patients with Bacteremia caused by Extended-Spectrum β-Lactamase-Producing Enterobacteriaceae: Piperacillin-Tazobactam
Hyunjoo OH ; Seunghee LEE ; Misun KIM ; Sang Taek HEO ; Jeong Rae YOO
Korean Journal of Medicine 2024;99(3):149-157
Background/Aims:
Carbapenems are recommended for treating bacteremia caused by extended-spectrum β-lactamase (ESBL) producing Enterobacteriaceae (ESBL-E). However, this has resulted in a significant rise in the utilization of carbapenems in cases of ESBL-E infection. We evaluated the clinical outcomes of patients with ESBL-E bacteremia treated with non-carbapenem antimicrobials.
Methods:
We conducted a retrospective case-control study of a cohort of patients with documented ESBL-E bacteremia from January 2021 to December 2021. The patients were divided into two groups according to whether they received non-carbapenem or carbapenem therapy. The rates of treatment failure, 30-day mortality and microbiologic failure, and the durations of hospitalization and of antimicrobial therapy were compared between the two groups. Antimicrobial susceptibility testing and phenotypic identification of ESBL-E were performed using the Vitek 2 system.
Results:
Of 118 patients with ESBL-E bacteremia, 54 received non-carbapenem drugs (non-carbapenem group [NCG]) and 64 received carbapenems (carbapenem group [CG]). Treatment failure at 30 days occurred in 16.7% of the patients in the NCG and in 18.8% in the CG (p = 0.65). The 30-day mortality rate was 14.8% in the NCG and 17.2% in the CG (p = 0.63). Extra-urinary tract infection and prior antimicrobial therapy within 30 days were risk factors for treatment failure in patients with ESBL-E bacteremia. The clinical outcomes did not differ significantly between the two groups, challenging the prevailing preference for carbapenems in the treatment of ESBL-E bacteremia.
Conclusions
Non-carbapenem antimicrobials such as piperacillin/tazobactam are recommended for patients with mild ESBL-E bacteremia in South Korea.
9.Evaluation of first year outcomes of Lee Jong-Wook Seoul Project using Kirkpatrick's four-level evaluation approach.
Seunghee LEE ; Jwa Seop SHIN ; Do Hwan KIM ; Eun Jeong KIM ; Jinyoung HWANG ; Hyun Bae YOON
Korean Journal of Medical Education 2014;26(1):41-51
PURPOSE: The Lee Jong-Wook Seoul Project, which began in 2011, is a training program that aims to educate faculty members of Lao University of Health Sciences in medical knowledge and skills. The project has tremendous significance, attempting to apply the Korean health care developmental model to developing countries. Precise evaluation of the project outcome must be performed to enhance the effectiveness, improve the shortcomings, and adjust the future direction of the program. METHODS: Trainers and exchange professors were asked to fill out questionnaires in the middle and at the end of the program. Eight months after its completion, an evaluation team visited Lao and interviewed each exchange professor individually. Also, 360-degree feedback was obtained from their colleagues. We analyzed the answers to the questionnaires, based on Kirkpatrick's 4-level model. RESULTS: The trainers and exchange professors had positive reactions to the program. All participants felt that their knowledge and skills improved (in their respective fields), although the actual improvement was not extensive, according to their trainers' assessments. The 360-degree feedback demonstrated that the participants actively passed on their experience, knowledge, and skills to their colleagues on returning to work. CONCLUSION: Although a 4-level evaluation was not conducted and despite the limitations in examining academic achievement, interviewing Lao professors, and acquiring quantitative data at Lao University of Health Sciences, this project has demonstrated its value in the development of individual professors and their colleagues.
Delivery of Health Care
;
Developing Countries
;
Education
;
Seoul*
;
Surveys and Questionnaires
10.How different are premedical freshmen who enter after introducing a multiple mini-interview in a medical school?.
Do Hwan KIM ; Jinyoung HWANG ; Eun Jeong KIM ; Hyun Bae YOON ; Jwa Seop SHIN ; Seunghee LEE
Korean Journal of Medical Education 2014;26(2):87-98
PURPOSE: Seoul National University College of Medicine (SNUMC) introduced a multiple mini-interview (MMI) to assess the noncognitive ability of applicants in 2013. This study aims to examine whether students differ with regard to their personal career values and academic achievements by admission type. METHODS: We administered a survey about career values and self-perception of competencies. We then compared the survey results and academic achievements by admission type. Finally, the correlation coefficient between MMI score and academic achievement was calculated in the MMI group. The data were analyzed by t-test and correlation analysis. RESULTS: There was no statistically significant difference in career values between groups. For self-perception of competency, only the 'interact in heterogeneous groups' domain was higher for those who entered through the MMI. The MMI group had a higher and broader level of academic achievement. Within the MMI group, there was a significant correlation between grade point average and MMI station scores. CONCLUSION: The characteristics of students who entered through the MMI were more in accordance with the goals of SNUMC and the competency of future doctors. Considering the unique feature of premedical academic achievement, this result implies that such students have superior noncognitive abilities, such as self-development and internal motivation. How these differences change subsequently remains to be seen.
Humans
;
Motivation
;
Schools, Medical*
;
Self Concept
;
Seoul
;
Students, Premedical