1.Use of cryopreserved cadaveric arterial allograft as a vascular conduit for peripheral arterial graft infection.
Hyojeong KWON ; Hyunwook KWON ; Joon Pio HONG ; Youngjin HAN ; Hojong PARK ; Gi Won SONG ; Tae Won KWON ; Yong Pil CHO
Annals of Surgical Treatment and Research 2015;89(1):51-54
Major peripheral arterial graft infection is a potentially devastating complication of vascular surgery, associated with significant mortality and high amputation rates. Autologous saphenous veins are considered optimal arterial conduits for lower extremity revascularization in infected fields, but they are often unavailable or unsuitable in these patients. This study describes two patients with major peripheral graft infection, but without available autologous veins, who underwent graft excision and cryopreserved cadaveric arterial allograft reconstruction. Although long-term graft durability is unclear because of gradual deterioration and degeneration, these findings suggest that cadaveric allografts may be good options for patients with major peripheral graft infection.
Allografts*
;
Amputation
;
Blood Vessel Prosthesis
;
Cadaver*
;
Humans
;
Lower Extremity
;
Mortality
;
Saphenous Vein
;
Tissue Preservation
;
Transplants*
;
Veins
2.Effects of Natural Versus Synthetic Consonant and Vowel Stimuli on Cortical Auditory-Evoked Potential
Hyunwook SONG ; Seungik JEON ; Yerim SHIN ; Woojae HAN ; Saea KIM ; Chanbeom KWAK ; Eunsung LEE ; Jinsook KIM
Journal of Audiology & Otology 2022;26(2):68-75
Background and Objectives:
Natural and synthetic speech signals effectively stimulate cortical auditory evoked potential (CAEP). This study aimed to select the speech materials for CAEP and identify CAEP waveforms according to gender of speaker (GS) and gender of listener (GL).
Subjects and Methods:
Two experiments including a comparison of natural and synthetic stimuli and CAEP measurement were performed of 21 young announcers and 40 young adults. Plosive /g/ and /b/ and aspirated plosive /k/ and /p/ were combined to /a/. Six bisyllables–/ga/-/ka/, /ga/-/ba/, /ga/-/pa/, /ka/-/ba/, /ka/-/pa/, and /ba/-/pa/–were formulated as tentative forwarding and backwarding orders. In the natural and synthetic stimulation mode (SM) according to GS, /ka/ and /pa/ were selected through the first experiment used for CAEP measurement.
Results:
The correction rate differences were largest (74%) at /ka/-/ pa/ and /pa/-/ka/; thus, they were selected as stimulation materals for CAEP measurement. The SM showed shorter latency with P2 and N1-P2 with natural stimulation and N2 with synthetic stimulation. The P2 amplitude was larger with natural stimulation. The SD showed significantly larger amplitude for P2 and N1-P2 with /pa/. The GS showed shorter latency for P2, N2, and N1-P2 and larger amplitude for N2 with female speakers. The GL showed shorter latency for N2 and N1-P2 and larger amplitude for N2 with female listeners.
Conclusions
Although several variables showed significance for N2, P2, and N1-P2, P1 and N1 did not show any significance for any variables. N2 and P2 of CAEP seemed affected by endogenous factors.
3.Efficacy of Cereal-based Oral Nutrition Supplement on Nutritional Status, Inflammatory Cytokine Secretion and Quality of Life in Cancer Patients Under Cancer Therapy
Jin-Min KIM ; Beom-Seok SONG ; Sung-Gil HONG ; Hee-Jung SOHN ; Hyunwook BAIK ; Mi-Kyung SUNG
Journal of Cancer Prevention 2020;25(2):126-126
4.Efficacy of Cereal-based Oral Nutrition Supplement onNutritional Status, Inflammatory Cytokine Secretion andQuality of Life in Cancer Patients under Cancer Therapy
Jin-Min KIM ; Sung-Gil HONG ; Bum-Seok SONG ; Hee-Jung SOHN ; Hyunwook BAIK ; Mi-Kyung SUNG
Journal of Cancer Prevention 2020;25(1):55-63
A rapid increase in cancer incidence accompanied by aging population requires evidence-based supportive cancer care practices.Cancer therapies often accompany adverse events which induce malnutrition and declined quality of life. We conducted an 8-weeknon-randomized clinical trial to evaluate efficacy of cereal-based oral nutritional supplement (ONS) intervention on nutritional status,quality of life and inflammatory responses in cancer patients undergoing cancer therapy with 5% < weight loss. The study included34 pateints (24 in control group, 10 in intervention group) with 15 drop-outs. ONS used in this intervention contained 0.5% arabinoxylan-rich fermented rice bran powder and 5.5% black rice powder as active ingredients in a regular cereal-based formula. Resultsshowed that ONS intervention for 8 weeks did not show significant improvement in blood biomarkers of nutritional status or patient-generated subjective global assessment scores. However, 8-week of intervention showed reduced interleukin (IL)-6 and IL-1bsecretion in lipopolysaccharide-stimulated peripheral blood mononuclear cells while IL-12p70 level was increased. For health-relatedquality of life (HRQoL) indices, emotional functioning and fatigue symptoms were improved after 4 weeks only in the interventiongroup although no difference was found at week 8. These results suggest that ONS intervention may improve chronic inflammatorystatus and HRQoL indices (at week 4) in cancer patients receiving treatments.
5.Types of Hearing Protection Devices and Application.
Hyunwook SONG ; Seungyeop JEONG ; Eunsung LEE ; Nour ALSABBAGH ; Jangwon LEE ; Sunghwa YOU ; Chanbeom KWAK ; Saea KIM ; Woojae HAN
Korean Journal of Otolaryngology - Head and Neck Surgery 2019;62(1):1-14
Since noise-induced hearing loss (NIHL) is one of prevalent issues in the occupational settings, hearing protection device (HPD) has been widely used to reduce noise exposure levels and to prevent developing NIHL. This review study aimed to introduce several types of the HPD in terms of current trends, its variety and functions, and application. Including a brief history of the HPD, we explain its two types, i.e., passive and active functions, in the first part of main body. The passive HPD has a flat attenuation across the overall frequency range, whereas the active HPD effectively preserves communication components such as meaningful speech with low intensity stimuli while filtering out the high levels of noise. In the second part of the main body, we discuss some negative issues of hearing functions when users are wearing the HPD. In detail, the active HPD does not much degrade the hearing performance for speech detection/recognition and sound source localization compared to the passive HPD. Rather, reduced sound (or music) quality is improved with active one in general. In the final part, we mention that although various applications in the special fields such as factory, mining, army, airplane, and music have been demonstrated, the usage and awareness of HPD in occupational aspect may not follow its fast technological development. Furthermore, most people do not know about either importance or use method of HPD in the non-occupational setting. For these reasons, we conclude that hearing professionals have to access the latest trends of the HPD and to increase their knowledge on it, and thus they should provide the best HPD prescription for the public as well as employees who have to protect their ears from hazard noise impacts.
Aircraft
;
Ear
;
Hearing Loss, Noise-Induced
;
Hearing*
;
Methods
;
Mining
;
Music
;
Noise
;
Prescriptions
;
Public Health
6.Never-Smoker Lung Cancer Is Increasing.
Hyunwook KANG ; Chan Woo PARK ; Woojin KIM ; Sang Yun SONG ; Kook Joo NA ; Jae Uk JEONG ; Mee Sun YOON ; Sung Ja AHN ; Yoo Duk CHOI ; Chan CHOI ; Daun LEE ; Hyun Ju SEON ; Yun Hyeon KIM ; Seong Young KWON ; Hee Seung BOM ; In Jae OH ; Kyu Sik KIM ; Young Chul KIM
Journal of Lung Cancer 2012;11(2):89-93
PURPOSE: Lung cancer has been the leading cause of death in South Korea since the year 2000. Adenocarcinoma became the most frequent type in the national survey of lung cancer since year 2005. MATERIALS AND METHODS: We analyzed 5,456 cases with lung cancer from 2004 to 2012 in a community cancer center. The mean age was 69.9 years, and 78.9% was male. RESULTS: Adenocarcinoma (ADC, 40.8%) was the most frequent type, followed by squamous cell carcinoma (SQC, 36.4%), small cell carcinoma (SCC, 14.8%) and non-small cell lung cancer (NSCLC) not otherwise specified (8.1%). In male patients, SQC was the most frequent type (43.5%), while ADC showed highest incidence in females (72.6%). Anatomic stage at diagnosis in NSCLC was I (10.3%), II (5.8%), IIIA (15.7%), IIIB (19.2%), and IV (49.0%). In SCC, 41.7% was in limited stage and 58.3% was diagnosed in extensive stage. The proportion of never smoker has been increased from 19.1% in 2004~2008 to 25.4% in 2009~2012. Never-smokers are more likely to be female (68.2% vs. 4.0%, p<0.001), have ADC (69.9% vs. 31.3%, p<0.001), and manifest as stage IV disease (58.5% vs. 45.2%, p<0.001), compared to smokers. Among 1,908 cases whose initial treatment was recorded, 42.5% received chemotherapy, 25.7% received radiation treatment, 20.5% received surgery and the remaining 11.3% received supportive cares only or transferred to other health care facilities. CONCLUSION: In conclusion, proportion of lung cancer in never-smoker is increasing. As screening for smokers will miss this growing population, we need to discover biomarkers to find high risk population of lung cancer.
Adenocarcinoma
;
Biomarkers
;
Carcinoma, Non-Small-Cell Lung
;
Carcinoma, Small Cell
;
Carcinoma, Squamous Cell
;
Cause of Death
;
Delivery of Health Care
;
Female
;
Humans
;
Incidence
;
Lung
;
Lung Neoplasms
;
Male
;
Mass Screening
;
Republic of Korea
;
Smoking
7.Impact of Coronavirus Disease 2019 on Gastric Cancer Diagnosis and Stage:A Single-Institute Study in South Korea
Moonki HONG ; Mingee CHOI ; JiHyun LEE ; Kyoo Hyun KIM ; Hyunwook KIM ; Choong-Kun LEE ; Hyo Song KIM ; Sun Young RHA ; Gyu Young PIH ; Yoon Jin CHOI ; Da Hyun JUNG ; Jun Chul PARK ; Sung Kwan SHIN ; Sang Kil LEE ; Yong Chan LEE ; Minah CHO ; Yoo Min KIM ; Hyoung-Il KIM ; Jae-Ho CHEONG ; Woo Jin HYUNG ; Jaeyong SHIN ; Minkyu JUNG
Journal of Gastric Cancer 2023;23(4):574-583
Purpose:
Gastric cancer (GC) is among the most prevalent and fatal cancers worldwide.National cancer screening programs in countries with high incidences of this disease provide medical aid beneficiaries with free-of-charge screening involving upper endoscopy to detect early-stage GC. However, the coronavirus disease 2019 (COVID-19) pandemic has caused major disruptions to routine healthcare access. Thus, this study aimed to assess the impact of COVID-19 on the diagnosis, overall incidence, and stage distribution of GC.
Materials and Methods:
We identified patients in our hospital cancer registry who were diagnosed with GC between January 2018 and December 2021 and compared the cancer stage at diagnosis before and during the COVID-19 pandemic. Subgroup analyses were conducted according to age and sex. The years 2018 and 2019 were defined as the “before COVID” period, and the years 2020 and 2021 as the “during COVID” period.
Results:
Overall, 10,875 patients were evaluated; 6,535 and 4,340 patients were diagnosed before and during the COVID-19 period, respectively. The number of diagnoses was lower during the COVID-19 pandemic (189 patients/month vs. 264 patients/month) than before it.Notably, the proportion of patients with stages 3 or 4 GC in 2021 was higher among men and patients aged ≥40 years.
Conclusions
During the COVID-19 pandemic, the overall number of GC diagnoses decreased significantly in a single institute. Moreover, GCs were in more advanced stages at the time of diagnosis. Further studies are required to elucidate the relationship between the COVID-19 pandemic and the delay in the detection of GC worldwide.