Association of respiratory rate and environmental hazardous substances in vulnerable and susceptible individuals: Application of Rolling Window Correlation and Bayesian Kernel Machine Regression Model in short-term exposures

정용휘,강대용 환경독성보건학회 2023 한국독성학회 심포지움 및 학술발표회 Vol.2023 No.11

운수업 종사자의 건강행태가 직무소진에 미치는 영향

정용휘,이현주,정혜선 한국직업건강간호협회(구 한국산업간호협회) 2019 직업건강연구 Vol.1 No.2

소아 안면부 열상 환자의 임상 분석

정용휘,황민규,황소민,임광열,안성민,송제니퍼김 대한성형외과학회 2011 Archives of Plastic Surgery Vol.38 No.6

Purpose: Pediatric facial laceration takes a huge part of patients visiting emergency room and generates social attention for its proper emergency care. So much more attention should be paid to the proper treatment at Pediatric facial lacerations are the most common single type of childhood injury requiring evaluation by a specialized physician. Proper management of the pediatric facial laceration is critical in its primary management for potential permanent scar formation. Therefore, it is becoming an issue that the treatment plan should focus not only on wound healing but also on the cosmetic aspect. Due to their lack of attention, lack of decision-making ability and immature athleticism, children are more vulnerable to trauma than adults are. Among pediatric accidents, laceration composes about 32%, which is becoming a huge portion.1 67.7% of in-patients of ER are aged under 15 years.2 Despite the commonplace of its nature, no current report has mentioned its epidemiologic character in domestic incidence of pediatric facial laceration. Therefore, authors have reviewed and analyzed all the medical records of facial laceration aged under 15 years at 2 years period at our clinic. This act was incorporated to achieve a better understanding regarding thorough background information of pediatric facial lacerations. emergency care unit, and furthermore, thorough survey of background information of the pediatric facial laceration may offer more proper prevention. Methods: According to annual reports of 2009 and 2010, out of 5149 facial laceration patients who were given primary medical care at our clinic, 1452 patients were aged under 15 years old. Retrospective analysis of each pediatric facial lacerations were evaluated according to gender, age, periodic table, cause of injury, place of injury,sites of injury and so on. Results: Pediatric facial laceration was found to occur mostly at 1 year old as they learn to walk and explore their environment. Evaluated analysis revealed that pediatric facial accidents occurred mostly on forehead region (75%),on Sundays, from 5 p.m. to 8 p.m., at home (61.5%). Most common cause of injury was collision (54.5%). Conclusion: In large group of pediatric facial laceration cases provided us with an surprising fact that accidents most commonly occur under parental supervision. This fact gives an actual understanding regarding pediatric facial laceration and more realistic approach in its prevention strategy.

소이증

정용휘 釜山醫師會 1984 釜山醫師會誌 Vol.20 No.1

피판하 혈종이 Flap Survival에 미치는 영향에 대한 실험적 연구

정성훈,김석권,김성수,정용휘 大韓成形外科學會 1984 Archives of Plastic Surgery Vol.11 No.4

In flap surgery used frequently in the scope of plastic surgery, surgeons sometimes have been experienced the flap necrosis, which is caused by poor vascular supply due to inadequate design of flap, gravity, twisting or kinking of flap, pressure, infection and underlying hematoma, and so on, it leads to undesirable postoperative result. Among them, hematoma--related flap necrosis is the most unpredictable and frequent, thus it is very urgent to grope its cause and the way to overcome this complication. But precise mechanism of flap necrosis has not been revealed yet, the mechanism of hematoma related flap necrosis which is explained until now are; increased internal pressure, constituent of homolysate. But the way to overcome hematomarelated flap necrosis is hardly reported. Though they say early surgical removal of hematoma will prevent most of flap necrosis, the previous studies have not reported the other nonsurgical method and the adequate time of removal of hematoma. So the purpose of this study is to describe; What is the mechanism of flap necrosis due to underlying hematoma. What method of removal of hematoma will increase the flap survival. When the hematoma should be removed to increase the flap survival. The results of the experiment are follows; 1) Flap necrosis was severe significantly in blood, blood clot and hemoglobin injected group. 2) Flap necrosis due to underlying hematoma is thought to be caused by the toxic effect of red blood cell or hamolysate of red blood cell. 3) Surgical removal group of the underlying hemotoma had a significant better result in survival of flap than no removal control, hydrogen peroxide irrigation and urokinase injected group. 4) Surgical removal of the underlying hematoma carried out within 6 hours after injection of blood beneath the flap made no statistically significant difference in flap survival as compared with no blood control group. Surgical removal of hematoma 6 hours after blood injection or other nonsurgical methods of revealed in rather better result in flap survival as compared with no removal control group, but there was a statistically significant difference in survival compared with no blood control group.

수부 구축성 화상반흔 환자에서 술후 관절운동범위의 개선에 관한 임상적 고찰

오재욱,강양주,정용휘 大韓成形外科 學會 1988 Archives of Plastic Surgery Vol.15 No.1

Burns of the hand are common in patients with thermal injury. But, because the treatment of burn is usually directed toward the life saving and due to the shortage of the knowledge about the postburn deformities, many patients with hand burn are found after development of severe functional impairment, In department of plastic surgery of Inje College, Baik Hospital, 59 cases of burn scar contractured hands were treated with free skin graft and aggressive physiotherapy from January of 1984 to December of 1986. The results are follow; 1) Among the 59 cases of burn contracted hands, 48 cases (81%) were excellent in results. 2) The other 11 cases of fair or poor end results were mainly due to the third degree burn and inadequate splinting after split thickness skin grafting. 3) Age of the patient had close relation to the postoperative functional recovery, the younger the better. 4) The postoperative end results in contracture after electric or flame burn were worse than in contracture after the others. 5) The results of full thickness skin graft were better than that of split thickness skin graft. 6) The time duration from burn injury to skin grafting has an important effect on postoperative end results, the longer the worse. 7) The degree of preoperative limitation of motion has close relationship with postoperative end results, the severer limitation of motion, the worse end results.

경안부 방선균증의 치험 1례

윤홍주,정용휘 大韓成形外科學會 1986 Archives of Plastic Surgery Vol.13 No.1

Actinomycosis is a chronic suppurative and granulomatous bacterial infection. However, the comparative infrequency of actinomycosis than many other infectious lesions makes a clinician to suggest the disease difficult. Actinomycosis is clinically classified according to the lesional site, as 1) cervicofacial form, 2) thoracic form, 3) abdominal form, and 4) disseminated form. We experienced 1 case of cervicofacial actinomycosis and present the case with a brief review of the literatures.

Myocutaneous Flap의 임상적 응용

김형만,김성수,정용휘 大韓成形外科學會 1981 Archives of Plastic Surgery Vol.8 No.2

There has been much development of clinical application of myocutaneous flap in recent decade in the field of plastic & reconstructive surgery. Skin grafting or skin flap has too much disadvantages, and there are some cases in which it is impossible to use those methods for reconstruction of large soft tissue defect. Myocutaneous flap is a very useful method of treatment for such soft tissue defects, as seen in trauma, burn (esp.electric burn), pressure sore, radiation injury, and defect after cancer surgery. From Jan. 1978 to Dec. 1980, we had expieranced 5 cases of large soft tissue defects, and 4 different myocutaneous flaps were applied for reconstruction of above cases. The results were successful in all cases, without significant complication.

국산 기자재를 사용한 흡인지방제거술 치험례(1례)

윤홍주,오재욱,정용휘 大韓成形外科學會 1986 Archives of Plastic Surgery Vol.13 No.1

It was not until the presentation by Illouz and Fournier at the ASPRS annual meeting in Hawaii in October 1982, that many plastic surgeons began to consider suction lipectomy as a real possibility. The idea of subcutaneous fat resection has changed by the new tools over the years. However, purchasing the foreign professional equipment accompanies with much economical burden and inhibits the development of domestic devices. From this point of view, we examined the domestic machinery on the adequacy of utilizing in suction lipectomy and operated one case without a complication. The advantages of utilizing the domestic machinery as compared with the foreign professional equipment are (1) The least economical burden and (2) A sufficient pressure for operation. On the other hand, the disadvantages of utilizing the domestic machinery as compared with the foreign professional equipment are (1) Time loss to reach a sufficient pressure, that makes and operation prolonged and (2) short length of the cannula. We wish further comparison and assessment of the domestic machinery should be made on the basis of many cases operated by it.

하안검 Switch Flap을 이용한 상안검 재건 : 치험 1례

정용휘,김성수 大韓成形外科學會 1982 Archives of Plastic Surgery Vol.9 No.3

The eyelids have an important function of protecting cornea, and thus maintaining visual acuity. Any defects of eyelids requires an immediate reconstruction to protect cornea and preserve visual acuity. Upper eyelid has a more important in functional aspect than its lower counterpart. Moreover, reconstruction of upper eyelid is a relatively difficult according to the severity of defect. This article deals with a case of basal cell carcinoma of right upper eyelid which was treated with successful outcome at department of plastic surgery. The patient was female, 62 years of age and had a basal cell carcinoma of right upper eyelid of 5 years' duration, which involved about four-fifths of right upper eyelid in transverse diameter and tarsal plate in its nearly entire depth longitudinally. We resected the entire cancer mass and reconstructed upper eyelid defect using switch flap of lower eyelid and the defect in lower eyelid was reconstructed with a composite graft of nasal septal cartilage.