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Jo Yumin,Oh Chahyun,Lee Woo-Yong,Chung Hyung-Jin,Park Hanmi,Park Juyeon,Lee Jieun,김윤희,고영권,Chung Woosuk,Hong Boohwi 대한마취통증의학회 2024 Korean Journal of Anesthesiology Vol.77 No.1
Background: Among the various diaphragm-sparing alternatives to interscalene block, costoclavicular block (CCB) demonstrated a low hemidiaphragmatic paresis (HDP) occurrence but an inconsistent analgesic effect in arthroscopic shoulder surgery. We hypothesized that a larger volume of local anesthetic for CCB could provide sufficient analgesia by achieving sufficient supraclavicular spreading.Methods: Sixty patients scheduled for arthroscopic rotator cuff repair were randomly assigned to receive CCB using one of two volumes of local anesthetic (CCB20, 0.75% ropivacaine 20 ml; CCB40, 0.375% ropivacaine 40 ml). The primary outcome was the rate of complete analgesia (0 on the numeric rating scale of pain) at 1 h postoperatively. The secondary outcomes included a sonographic assessment of local anesthetic spread, diaphragmatic function, pulmonary function, postoperative opioid use, and other pain-related experiences within 24 h postoperatively. Results: The rates of complete analgesia were not significantly different (23.3% [7/30] and 33.3% [10/30] in the CCB20 and CCB40 groups, respectively; risk difference 10%, 95% CI [–13, 32], P = 0.567). There were no significant differences in other pain-related outcomes. Among the clinical factors considered, the only factor significantly associated with postoperative pain was the sonographic observation of supraclavicular spreading. There were no significant differences in the incidence of HDP and the change in pulmonary function between the two groups.Conclusions: Using 40 ml of local anesthetic does not guarantee supraclavicular spread during CCB. Moreover, it does not result in a higher rate of complete analgesia compared to using 20 ml of local anesthetic in arthroscopic shoulder surgery.
허규,이가영,Yumin Chung,채승완,최영준 대한피부과학회 2023 Annals of Dermatology Vol.35 No.-
Extramammary Paget disease (EMPD) is a rare adenocarcinoma that usually occurs in areas of the body that are rich in apocrine sweat glands. Great depth of tumor invasion is a well-known risk factor for worse prognosis. Paget cells usually are limited to the epidermis, whereas invasive EMPD, which infiltrates the dermis, is relatively rare. It is even rarer for the tumor to spread be- yond the dermis. Only 3.1% of patients with EMPD of the penis and scrotum have exhibited infil- tration of the subcutaneous fat layer. We report a case of a 62-year-old male with EMPD that in- vaded the subcutaneous fat layer. He presented with a several-year history of a slowly expanding erythematous plaque with the hypopigmented area on the left penoscrotum. One month before presentation, the patient had undergone punch biopsy at another hospital and diagnosed with EMPD. He had no personal history of urogenital cancers. The patient was treated with Mohs micrographic surgery, and negative margins were achieved after four stages. The histopathologic findings revealed Paget cells scattered throughout the epidermis. At the hypopigmented area, Paget cells extended to the subcutaneous fat layer with lymphovascular invasion. There was no evidence of recurrence at seven months postoperatively. Herein, we describe a case of hypopig- mented EMPD that infiltrated the subcutaneous layer, which rarely has been reported in Korea.
Ullah, Farman,Sim, Yumin,Le, Chinh Tam,Seong, Maeng-Je,Jang, Joon I.,Rhim, Sonny H.,Tran Khac, Bien Cuong,Chung, Koo-Hyun,Park, Kibog,Lee, Yangjin,Kim, Kwanpyo,Jeong, Hu Young,Kim, Yong Soo American Chemical Society 2017 ACS NANO Vol.11 No.9
<P>The covalently bonded in-plane heterostructure (HS) of monolayer transition-metal dichalcogenides (TMDCs) possesses huge potential for high-speed electronic devices in terms of valleytronics. In this study, high-quality monolayer MoSe2WSe2 lateral HSs are grown by pulsed-laser-deposition-assisted selenization method. The sharp interface of the lateral HS is verified by morphological and optical characterizations. Intriguingly, photoluminescence spectra acquired from the interface show rather clear signatures of pristine MoSe2 and WSe2 with no intermediate energy peak related to intralayer excitonic matter or formation of MoxW(1-x)Se2 alloys, thereby confirming the sharp interface. Furthermore, the discrete nature of laterally attached TMDC monolayers, each with doubly degenerated but nonequivalent energy valleys marked by (K-M, K'(M)) for MoSe2, and (K-w, K'(w)) for WSe2 in k space, allows simultaneous control of the four valleys within the excitation area without any crosstalk effect over the interface. As an example, K-M and K-w valleys or K'(M) and K'(w) valleys are simultaneously polarized by controlling the helicity of circularly polarized optical pumping, where the maximum degree of polarization is achieved at their respective band edges. The current work provides the growth mechanism of laterally sharp HSs and highlights their potential use in valleytronics.</P>
Jeon Sungmi,Kim Yumin,Phi Ji Hoon,Chung Jee Hyeok 대한성형외과학회 2023 Archives of Plastic Surgery Vol.50 No.1
Patients with Crouzon syndrome have increased risks of cerebrospinal fluid (CSF) rhinorrhea and meningoencephalocele after Le Fort III osteotomy. We report a rare case of meningoencephalocele following Le Fort III midface advancement in a patient with Crouzon syndrome. Over 10 years since it was incidentally found during transnasal endoscopic orbital decompression, the untreated meningoencephalocele eventually led to intermittent clear nasal discharge, frontal headache, and seizure. Computed topography (CT) and magnetic resonance (MR) imaging demonstrated meningoencephalocele in the left frontal-ethmoid-maxillary sinus through a focal defect of the anterior cranial base. Through bifrontal craniotomy, the meningoencepehalocele was removed and the anterior cranial base was reconstructed with a pericranial flap and split calvarial bone graft. Secondary frontal advancement was concurrently performed to relieve suspicious increased intracranial pressure, limit visual deterioration, and improve the forehead shape. Surgeons should be aware that patients with Crouzon syndrome have the potential for an unrecognized dural injury during Le Fort III osteotomy due to anatomical differences such as inferior displacement and thinning of the anterior cranial base.
( Gyoo Huh ),( Ga-young Lee ),( Yumin Chung ),( Seung-wan Chae ),( Young-jun Choi ) 대한피부과학회 2023 Annals of Dermatology Vol.35 No.7
Extramammary Paget disease (EMPD) is a rare adenocarcinoma that usually occurs in areas of the body that are rich in apocrine sweat glands. Great depth of tumor invasion is a well-known risk factor for worse prognosis. Paget cells usually are limited to the epidermis, whereas invasive EMPD, which infiltrates the dermis, is relatively rare. It is even rarer for the tumor to spread beyond the dermis. Only 3.1% of patients with EMPD of the penis and scrotum have exhibited infiltration of the subcutaneous fat layer. We report a case of a 62-year-old male with EMPD that invaded the subcutaneous fat layer. He presented with a several-year history of a slowly expanding erythematous plaque with the hypopigmented area on the left penoscrotum. One month before presentation, the patient had undergone punch biopsy at another hospital and diagnosed with EMPD. He had no personal history of urogenital cancers. The patient was treated with Mohs micrographic surgery, and negative margins were achieved after four stages. The histopathologic findings revealed Paget cells scattered throughout the epidermis. At the hypopigmented area, Paget cells extended to the subcutaneous fat layer with lymphovascular invasion. There was no evidence of recurrence at seven months postoperatively. Herein, we describe a case of hypopigmented EMPD that infiltrated the subcutaneous layer, which rarely has been reported in Korea.
Particulate matter induces ferroptosis by accumulating iron and dysregulating the antioxidant system
Minkyung Park,Young-Lai Cho,Yumin Choi,Jeong-Ki Min,Young-Jun Park,Sung-Jin Yoon,Dae-Soo Kim,Mi-Young Son,Su Wol Chung,Heedoo Lee,Seon-Jin Lee 생화학분자생물학회 2023 BMB Reports Vol.56 No.2
Particulate matter is an air pollutant composed of various components,and has adverse effects on the human body. Particulatematter is known to induce cell death by generating animbalance in the antioxidant system; however, the underlyingmechanism has not been elucidated. In the present study, wedemonstrated the cytotoxic effects of the size and compositionof particulate matter on small intestine cells. We found thatparticulate matter 2.5 (PM2.5) with extraction ion (EI) components(PM2.5 EI), is more cytotoxic than PM containing only polycyclicaromatic hydrocarbons (PAHs). Additionally, PM-inducedcell death is characteristic of ferroptosis, and includes ironaccumulation, lipid peroxidation, and reactive oxygen species(ROS) generation. Furthermore, ferroptosis inhibitor as liproxstatin-1and iron-chelator as deferiprone attenuated cell mortality, lipidperoxidation, iron accumulation, and ROS production after PM2.5EI treatment in human small intestinal cells. These results suggestthat PM2.5 EI may increase ferroptotic-cell death by ironaccumulation and ROS generation, and offer a potential therapeuticclue for inflammatory bowel diseases in human smallintestinal cells.