저혈압의 약국상담

정춘식 藥業新聞社 1995 醫藥情報 Vol.1995 No.9

크론병에 합병된 직장질루의 임상경과

정춘식,이동근,Bruce D. George,Neil J. Mortensen 대한대장항문학회 2007 Annals of Coloproctolgy Vol.23 No.1

Purpose:The aim of this study is to analyze the outcome of a variety of treatments, including local surgical treatments, diverting stoma, and combined medical therapy, for patients with a rectovaginal fistula complicating Crohn's disease. Methods: Between 1994 and 2003, twenty-one patients with a rectovaginal fistula complicating Crohn's disease from a prospectively compiled 422-patient Crohn's disease database were reviewed. Results: All three patients treated by seton and fibrin glue recurred despite having relatively long tracts. Of six patients with infliximab treatment combined with a seton procedure, five patients had an improvement of their symptoms, but were not cured. Of eight patients with a transanal or endovaginal advancement flap techniques, three had successful closure, three eventually required a proctectomy, and two had a recurrent fistula without symptoms. Four (2 without any local treatments, and 2 with seton placement) of 16 patients who had a diverting stoma during treatment had successful closure. All proctectomy patients (n=8) had rectal involvement of Crohn's disease. Two patients who underwent a proctectomy with a presumptive diagnosis of ulcerative colitis and indeterminate colitis turned out to have Crohn's disease. Overall, except for the proctectomy patients, seven patients (54%) had successful closure, but six (four without symptoms, and two with symptoms) following a wide spectrum of treatments had recurrence after a mean follow-up of 44 months. Conclusions: Combining different treatments for a rectovaginal fistula in Crohn's disease can be successful in a reasonable number of cases. The presence of uncontrolled perianal sepsis and/or complicated anorectal problems is likely to lead to a proctectomy.

Effect of Butanol Fraction of Panax ginseng Head on Gastric Lesion and Ulcer

정춘식 대한약학회 2002 Archives of Pharmacal Research Vol.25 No.1

복막외 접근법에 의한 좌측 서혜부 탈장수술 시 반대편 탈장 검색의 의의

정춘식,조용걸,유상화,정규영,김승한,이동근,이정은 대한내시경복강경외과학회 2009 Journal of Minimally Invasive Surgery Vol.12 No.1

Purpose: Laparoscopic herniorrhaphy (LH) can be used to examine the asymptomatic contralateral side and repair occult contralateral hernias coincidentally with reduced morbidity. In this prospective study, we evaluated the results of diagnostic exploration of the right side during total extraperitoneal (TEP) laparoscopic repair of left side inguinal hernias. Methods: A prospective study of 100 consecutive male patients undergoing TEP repair by a single surgeon (C.S) between January and June 2008 was conducted. Two cases that had transabdominal preperitoneal (TAPP) prosthetic repair and one intraperitoneal onlay mesh (IPOM) were excluded. We routinely explored the contralateral side to determine the incidence of right side occult hernia. Results: The mean age was 52 (range; 18∼82 years). Among the 100 patients, 17 had bilateral, 52 right and 31 left hernias on physical examination prior to surgery. Three of 31 diagnosed preoperatively as left inguinal hernia were confirmed to have occult right hernias (3/31, 9.7%). Among the three patients, two patients with a direct type had the same type of hernia as on the contralateral side (2/10, 20%). Another one patient with an indirect type had direct type of hernia on the contralateral side (1/21, 4.8%). Conclusion: Given the low incidence of contralateral side occult hernia with indirect types of hernias, routine exploration may not be indicated during TEP repair. However, it might be, reasonable to explore the contralateral side in patients with a direct type of hernia because of the higher incidence of contralateral occult hernias.

남녀 서혜부탈장의 비교 및 여자 서혜부탈장에 대한 복강경 수술

정춘식,이정은,유상화,이동근 대한내시경복강경외과학회 2012 Journal of Minimally Invasive Surgery Vol.15 No.1

Purpose: Unlike males, inguinal hernia surgery in females is an uncommon surgical procedure. The efficacy of laparoscopic surgery for female hernia must be proven. This study compared the clinical characteristics of male and female hernia as well as the efficacy of laparoscopic surgery with that of open surgery in female hernia. Methods: From March 2007 to February 2011, one surgeon (C.S.) at the authors’ institution operated on 965 patients (male/female=884/81) who were each more than 19 years old. The female patients were divided into the laparoscopic (n=67, TEP/TAPP=66/1) and open surgery groups (n=14). Results: The mean age of the female patients was lower than that of the male patients. The incidence of bilateral and direct hernia was higher in the male patients but the incidence of femoral hernia was higher in the female patients (0.6 vs. 8.6%, p<0.001). Among the 81 female patients, the mean age of the patients with femoral hernia was higher than that of the patients with other types of hernia (56.4±12.5/ 43.0±15.1, p<0.026). The operation times and pain scores of the two groups 7 days after surgery were comparable. Conclusion: The findings revealed a higher incidence of femoral hernia in the female patients than male patients. Patients with a femoral hernia were older than those with other types of hernia. Therefore, laparoscopic surgery must be considered for elderly female patients who have a high incidence of femoral hernia.

Effects of Filler Types and Content on Shrinkage Behavior of Polypropylene Composites

정춘식,황석호 한국고무학회 2022 엘라스토머 및 콤포지트 Vol.57 No.3

The effects of fillers [talc, calcium carbonate, glass fiber, and EBR (ethylene-butene rubber)] on the shrinkage and mechanical properties of injection-molded polypropylene composites were investigated. The shrinkage correlated with the shape of the filler particles: at the same amount added, glass fibers with a large aspect ratio had the greatest effect on the shrinkage of polypropylene composites, followed by flake-shaped talc and granular calcium carbonate. It was confirmed that the addition of EBR rubber as an impact strength modifier reduced shrinkage proportionally to the added content. In addition, the addition of glass fiber resulted in the greatest increases in tensile and flexural strengths.

질감 근사화 및 반복적 병합을 이용한 율왜곡 기반 영상 분할

정춘식,임채환,김남철 한국통신학회 2000 韓國通信學會論文誌 Vol.25 No.1

본 논문에서는 반복적 병합의 율왜곡 기반 비용을 계산할 때 일반화된 질감 근사화 과정을 도입함으로써 질감 특성이 고려된 율왜곡 기반 영상 분할 기법을 제시하였다. 이때 영역 내부의 질감은 SA-DCT를 적용한 후, 양자화 간격이 고정된 두 개의 균일 양자화기에 의해 DC 성분 및 AC 성분을 각각 근사화하여 율왜곡 기반 비용을 구하고, 이러한 율왜곡 기반 비용에 근거하여 반복적 병합을 이용한 영상 분할을 수행하였다. 256$\times$256 Lena에 대하여 실험한 결과, 제안한 분할법에 의한 영역기반 부호화는 DC 성분만으로 근사화하여 율왜곡 기반 영상분할에 의한 것과 JPEG에 비하여 각각 0.8~1.0 ㏈, 1.2~1.5㏈ 정도의 PSNR 성능 개선이 있는 것으로 나타났다. A rate-distortion based segmentation using recursive merging is presented, which considers texture as a homogeneity by adopting the procedure of a generalized texture approximation. The texture in a region is approximated by SA-DCT and a set of two uniform quantizers with fixed step sizes, one for DC and another for AC. Using the approximated texture, we calculated the rate-distortion based cost. The segmentation using recursive merging is performed by using the rate-distortion based cost. Experimental results for 256$\times$256 Lena show that the region-based coding using the proposed segmentation yields the PSNR improvements of 0.8~ 1.0 dB and 1.2~1.5 dB over that using the rate-distortion based segmentation with DC approximation only and JPEG, respectively.

두릅나무 근피 추출물의 약물학적 연구 - 두릅나무 추출물의 Butanol분획의 일반약리작용 -

정춘식,이은방 대한약학회 1993 약학회지 Vol.37 No.6

In the previous report, it was described that the butanol fraction of the root bark extract of Aralia elata had potent antigastritic and antiulcerative effects in rats, In this pharmacological profile, the fraction revealed low acute toxicities in mice and rats, no central nervous system activities, moderate analgesic action, weak inhibitory action in carrageenin edema of rats and no direct effects on isolated smooth muscles of rats and guinea-pigs. Slight lowering of blood pressure as given i.v. in rabbit was observed.

[Review] 더 솔로이스츠 오케스트라 제1회 정기연주회(Vn.김복수, Cond.서진) : 환희와 희망의 심포니 - 6월 20일(토) 5시 부산 금정문화회관 대공연장

정춘식 리음아트앤컴퍼니 2020 월간리뷰 Vol.2020 No.7

LDPC 부호에 의한 UEP 효과 분석

정춘식,주언경 대한전기학회 2011 정보 및 제어 심포지엄 논문집 Vol.2011 No.4