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Hae-Jin Lee,Seung Hun Lee,So Young Yoon,Jong Won Lee,Young Koo Kim,Eung Ho Choi 대한의학레이저학회 2018 MEDICAL LASERS Vol.7 No.1
Postinflammatory hyperpigmentation (PIH) is a reactive hypermelanosis of the skin occurring as a result of variable inflammatory processes, such as trauma, and inflammatory dermatosis. Although topical agents are the first-line treatment of PIH, treatment of PIH remains challenging. In this report, we treated a patient with PIH using picosecond-domain Nd:YAG lasers. After five sessions of 1,064-nm picosecond-domain Nd:YAG laser treatment, the patient presented nearly complete improvement, with no remarkable side effects or recurrence for the duration of 6 months. We suggest that 1,064-nm picosecond-domain Nd:YAG laser can be effectively and safely used to treat pigmented lesions in the dermis, particularly PIH, in Asian patients.
Hae-Won Koo 대한뇌혈관외과학회 2020 Journal of Cerebrovascular and Endovascular Neuros Vol.22 No.4
Ultrasonographic measurement of optic nerve sheath diameter (ONSD) has been validated to detect and monitor the increased intracranial pressure (IICP) in neurosurgical field. Especially, the ONSD has been known to reflect well the ICP in case of intracranial hemorrhage (ICH) occurring in the anterior circulation of intracranial vascular system, however it has not been well elucidated the role of ONSD in the posterior circulating vascular problems. A 43-year-old man presented with a subarachnoid hemorrhage with intraventricular hemorrhage due to rupture of dissecting aneurysm at right vertebral artery, and immediately performed the stent-assisted coil embolization. Two day after coil embolization, he became nearly alert without definite neurologic deficits. The ONSD was reduced from 5.8 mm to 5.5 mm. The 10th postoperative days, the patient suddenly changed into stuporous mentality due to rebleeding of aneurysm. The ONSD was enlarged to 6.7 mm. We report a case of intimate relationship between ONSD and IICP after rupture of dissecting aneurysm located in posterior circulation.
( Hae Gyun Park ),( Pyung Gul Park ),( Won Joong Kim ),( Yong Hee Park ),( Hyun Kang ),( Chong Wha Baek ),( Yong Hun Jung ),( Young Cheol Woo ),( Gill Hoi Koo ),( Hwa Yong Shin ) 대한통증학회 2014 The Korean Journal of Pain Vol.27 No.1
Postherpetic neuralgia (PHN) is one of the most difficult pain syndromes to treat. Invasive treatments may be considered when patients fail to obtain adequate pain relief from noninvasive treatment approaches. Here, we present three cases of PHN in the mandibular branch treated with ultrasound-assisted mental nerve block and pulsed radiofrequency treatment. None of the patients had adequate pain relief from the medical therapy, so we performed the mental nerve block on the affected side under ultrasound assistance. Two patients showed satisfactory pain relief continuously over 12 months without any further interventions, whereas one patient only had short-term pain relief. For the patient had short-term pain relief we performed pulsed radiofrequency treatment (PRFT) on the left mental nerve under ultrasound assistance. After PRFT, the patient had adequate pain relief for 6 months and there was no need for further management. (Korean J Pain 2014; 27: 81-85)
Hae-Won Koo 대한신경손상학회 2022 Korean Journal of Neurotrauma Vol.18 No.2
A vertebro-vertebral arteriovenous fistula is an abnormal communication between the vertebral artery and adjacent venous structures. Trauma is the most common cause of vertebral arteriovenous fistulas; however, the fistulas can also occur spontaneously. We herein report a case of a traumatic vertebro-vertebral arteriovenous fistula that occurred following the application of oriental acupuncture in the posterior neck region. A 64-yearold previously healthy female patient took over-the-counter medicine for cervical pain that occurred several months before the acupuncture session but showed no improvement. She had undergone oriental acupuncture treatment in the posterior lower neck region 1 month before visiting our hospital. After the treatment, she gradually developed tinnitus, accompanied by dizziness. Abnormal aneurysmal dilated vessels were observed in the right vertebral artery on computed tomography angiography. The patient was immediately admitted and underwent diagnostic angiography. She subsequently underwent stent-assisted coil embolization, which gradually resolved her dizziness and tinnitus.
( Hae Won Shin ),( Jinsook Lim ),( Semi Kim ),( Jimyung Kim ),( Gye Cheol Kwon ),( Sun Hoe Koo ) 한국미생물 · 생명공학회 2015 Journal of microbiology and biotechnology Vol.25 No.1
Trimethoprim-sulfamethoxazole (TMP-SMX) has been used for the treatment of urinary tract infections, but increasing resistance to TMP-SMX has been reported. In this study, we analyzed TMP-SMX resistance genes and their relatedness with integrons and insertion sequence common regions (ISCRs) in uropathogenic gram-negative bacilli. Consecutive nonduplicate TMP-SMX nonsusceptible clinical isolates of E. coli, K. pneumoniae, Acinetobacter spp., and P. aeruginosa were collected from urine. The minimal inhibitory concentration was determined by Etest. TMP-SMX resistance genes (sul and dfr), integrons, and ISCRs were analyzed by PCR and sequencing. A total of 45 E. coli (37.8%), 15 K. pneumoniae (18.5%), 12 Acinetobacter spp. (70.6%), and 9 Pseudomonas aeruginosa (30.0%) isolates were found to be resistant to TMP-SMX. Their MICs were all over 640. In E. coli and K. pneumoniae, sul1 and dfr genes were highly prevalent in relation with integron1. The sul3 gene was detected in E. coli. However, in P. aeruginosa and Acinetobacter spp., only sul1 was prevalent in relation with class 1 integron; however, dfr was not detected and sul2 was less prevalent than in Enterobacteriaceae. ISCR1 and/or ISCR2 were detected in E. coli, K. pneumoniae, and Acinetobacter spp. but the relatedness with TMP-SMX resistance genes was not prominent. ISCR14 was detected in six isolates of E. coli. In conclusion, resistance mechanisms for TMP-SMX were different between Enterobacteriaceae and glucose non-fermenting gram-negative bacilli. Class 1 integron was widely disseminated in uropathogenic gram-negative baciili, so the adoption of prudent use of antimicrobial agents and the establishment of a surveillance system are needed.
( Won Baek Kim ),( So Hae Park ),( Kyoung Yoon Koo ),( Bo Ram Kim ),( Minji Kim ),( Heeseob Lee ) 한국미생물 · 생명공학회 2016 Journal of microbiology and biotechnology Vol.26 No.9
Strain SPF4211, having hyaluronidase (HAase) inhibition activity, was isolated from P. davidiana (Carriere) Franch fruit (PrDF) sugar extract. The phenotypic and biochemical properties based on 16S rDNA sequencing and an API 50 CHB kit suggested that the organism was B. subtilis. To optimize the HAase inhibition activity of PrDF extract by fermentation of strain SPF4211, a central composite design (CCD) was introduced based on three variables: concentration of PrDF extract (X1: 1-5%), amount of starter culture (X2: 1-5%), and fermentation time (X3: 0-7 days). The experimental data were fitted with quadratic regression equations, and the accuracy of the equations was analyzed by ANOVA. The statistical model predicted the highest HAase inhibition activity of 37.936% under the optimal conditions of X1 = 1%, X2 = 2.53%, and X3 = 7 days. The optimized conditions were validated by observation of an actual HAase inhibition activity of 38.367% from extract of PrDF fermented by SPF4211. These results agree well with the predicted model value.
Won-Pyo Park,Kong-Man Chang,Bon-Jun Koo,Hae-Nam Hyun 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.6
Copper(II) acetate spectrophotometry method (CASM) was used for the rapid and convenient determination of cation exchange capacity (CEC) in soils. This method is composed of a single-step exchange reaction that adsorbs copper and is measured through spectrophotometry. The CEC of 16 Korean soils were measured using 1M ammonium acetate method (AAM) and the CASM. The CEC values determined by CASM and AAM were not significantly different, and were highly correlated (r = 0.966**). Due to the convenience, cost effectiveness, and time saving analysis of CASM, this method is recommended for most soil laboratories to measure CEC in Korean soils. However, CASM may not be applicable for soils that have a much higher CEC (greater than 20 cmolc kg<SUP>-1</SUP>).