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배상욱,박수현,정다정,박주현,신종성,김세광,박기현 연세대학교의과대학 2005 Yonsei medical journal Vol.46 No.5
This study aimed to investigate the relationship between bladder trabeculation, urinary function, and the stage of pelvic organ prolapse (POP). The medical records of 104 patients with POP who underwent cystoscopies and urodynamic studies were reviewed retrospectively. Age, incidence of detrusor instability, stage and site of POP, and the parameters of urodynamic studies of patients with and without bladder trabeculation were compared. The difference in the incidence of bladder trabeculation was estimated between patients with and without a suspected bladder outlet obstruction. There were significant differences in the patients' age, stage of POP, and maximal voiding velocity. Patients with a suspected bladder outlet obstruction had a significantly higher incidence of bladder trabeculation. In addition, patients with advanced stages of POP were also found to have a higher incidence of bladder trabeculation.
성인에서 발생한 도수 정복되지 않는 급성 요골두 전방 탈구 및 골절
배상욱,최윤선,김형석,송백용 대한수부외과학회 2014 대한수부외과학회지 Vol.19 No.2
Traumatic dislocation of the radial head without fracture of the olecranon isvery rare, especially in adults. We experienced a case of irreducible radial headdislocation with fracture without involvement of ulna. Open reduction andinternal fixation was performed. During surgery, brachialis was interposedbetween capitellum and radial head, and also interposed between the fragmentsat the fracture site of the radial head. At 12 months after operation, theradial head was well reduced with normal rotation. 성인에서 척골 골절이 동반되지 않은 외상성 요골두 전방 탈구는 매우 드물게 보고되고 있다. 저자들은 29세 여자에서발생한 요골두 골절과 동반된 비관혈적 도수 정복이 되지 않는 요골두 전방 탈구 환자를 경험하였고 수술 전 자기공명영상을 통하여 요골두와 소두 사이에 상완근이 감입되어 정복을 방해하는 소견과 더불어 요골두 골절편 사이에도 상완근과 관절낭이 감입되어 있었음을 확인하였다. 감입된 연부 조직을 빼내어 관혈적 정복을 시행하였고, 12개월간 추시관찰 결과 재탈구 또는 관절운동 제한 없이 만족스러운 결과를 얻을 수 있었다.
시간 지연이 있는 2차 시스템에 대한 안정화 제어기 설계
배상욱,양정현,권재성,최성웅,김범수 한국마린엔지니어링학회 2019 한국마린엔지니어링학회지 Vol.43 No.7
In this paper, we propose the stability conditions for a second-order time-delay system using the Lambert W function. Oscillation and non-oscillation criteria for a second-order delay differential equation were obtained by defining two functions and using their graphical properties. The stability conditions were derived based on the non-oscillation criteria. Oscillation or unstable systems can be asymptotically stabilized by static state feedback, in which the feedback gain is easily determined. Finally, the effectiveness and merits of the proposed approach were demonstrated through numerical examples. 본 연구에서는 Lambert W 함수를 이용해서 시간 지연이 있는 2차 시스템에 대한 안정화 조건을 제시한다. 2차 시간지연 시스템의 실근 존재 여부를 두 개의 함수를 정의한 후 이 함수들의 그래프 특성을 이용해서 진동 및 비진동 조건을 구한다. 비 진동 조건으로부터 안정화 조건을 구한다. 그리고 진동하거나 불안정한 시스템을 상태 궤환제어를 통해서 점근적으로 안정화 시키는 제어 이득을 쉽게 구할 수 있음을 보인다. 마지막으로, 수치 예를 통해서 제시된 방법의효과와 장점을 보인다.
배상욱,김진영,원종건,정창진,장경환,이병석,박기현,조동제,송찬호,Bai, S.W.,Kim, J.Y.,Won, J.G.,Jung, C.J.,Chang, K.H.,Lee, B.S.,Park, K.H.,Cho, D.J.,Song, C.H. 대한생식의학회 1997 Clinical and Experimental Reproductive Medicine Vol.24 No.1
The early studies demonstrated that the relative amount of FSH was important for stimulating normal ovarian activity and demonstrated the existence of a threshold level for FSH, above which follicular growth was activated. It was found that only a modest increase in circulating FSH level above the threshold (between 10 and 30%) was required to stimulate folliculogenesis. In addition, FSH is primary responsible for initiating estradiol production through the activation of the aromatase enzyme system in granulosa cells, follicular secretion and growth. LH on the other hand, plays a supportive role in ovarian steroidogenesis, stimulating the ovarian thecal cells to produce androgen, the precursor for estradiol synthesis. But there is now an increasing number of reports in the literature demonstrating an adverse effect of LH on fertility and miscarriage in infertile and fertile women. So HP-FSH is the drug of a highly purified FSH preparation which has a higher specific activity and far fewer impurities than FSH. This study was performed to evaluate the efficacy and safety of HP-FSH administered (SC; subcutaneous) versus FSH(IM; intramuscular) for ovulation induction. 20 candidates patients for ovulation induction were participated. All patients underwent pituitary desensitizing with a long gonadotropin-releasing hormone (GnRH) agonist protocol and ovulation induction was started with HP-FSH SC (10 patients; group I) or FSH IM (10 patients; group II). After ovulation, outcome of ovulation induction and local reaction of injection site were compared. There were no difference of outcome of ovulation in two groups except pregnancy rate/embryo transfer. Group I had a higher pregnancy rate/ embryo transfer than Group II (44.4% Vs 28.6%). Pain, redness, tenderness, bruising and itching when the injection received on the first 5 days of treated (50 SC and 50 IM injections) were assessed. There were no significant difference (P>0.05) in the incidence of tenderness, bruising and itching between the IM and SC injection. But IM injection (FSH) had a tendency of higher above incidence. The number of reports of pain, redness were significantly increased in IM injection group (P<0.05). These results indicate that SC administration of HP-FSH has been shown to be as effect for superovulation as traditional gonadotropins, with an improved safety profile due to the removal of extaneous proteins.