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KCCH cyclotron neutron 및 60Co r-ray에 의한 인체 말초혈액 임파구의 염색체 이상측정
김성호,김태환,정인용,조철구,고경환,류성렬 대한방사선 방어학회 1992 방사선방어학회지 Vol.17 No.1
KCCH cyclotron neutron(30cCy/min) 및 ??Co γ-ray(210cGy/min)를 시험관내의 정상 인체 말초혈액임파구에 조사하여 염색체이상(dicentric 및 centric ring)을 관찰하고 이의 선량-반응관계식을 linear model(Y=K₁D+a), power-law model(Y=K₂Dⁿ), quadratic model(Y=K₃D²) 및 linear-quadratic model(Y=αD+βD²)을 사용하여 구하고 이들 model중 염색체이상의 측정치와 가장 일치하는 관계식을 근거로 하여 γ -ray에 대한 neutron의 relative biological effectiveness(RBE)를 산출하였다. 염색체 이상(dicentric plus centric ring)의 발생분포는 γ-ray의 경우 linear model(P=0.067)을 제외한 power-law model[Y=(5.81±1.96)×10??, P=0.931], quadratic model [Y=(3.91±0.09)×10?D², P=0.972] 및 linear-quadratic model [Y=(6.55±6.83)×10?D+(3.72±0.22)×10?D², P=0.922]에 적합하였다. Neutron의 경우 linear model [Y=(6.12±0.17)×10?³ D-022, P=0.987]에 가장 일치하였고 quadratic model (P<0.005)을 제외한 power-law model[Y=(2.43±0.70)×10?³D+(1.21±0.39)×10?D², P=0.415]에 비교적 적합하였다. 세포당 0.1-1.5개의 염색체이상을 나타내는 neutron의 γ-ray에 대한 RBE는 2.714±0.408이었다. The frequencies of KCCH cyclotron neutron(30cCy/min) or ??Co γ-ray(210cGy/min)-induced asymmetrical interchanges(dicentrics and centric ring) and acentric fragment(deletion) at several doses were measured in the normal human peripheral blood lymphocytes. Chromosome aberrations were scored at the first nitosis after stimulation with phytohemagglutinin. The neutron and γ-ray data were analysed on liner, power-law, quadratic and linear-quadratic model. When the dicentrics and centric rings of γ-ray datas were pooled and fitted to these model, good fits were obtained to power-law [Y=(5.81±1.96)×10??, P=0.931], quadratic [Y=(3.91±0.09)×10?D², P=0.972] 및 linear-quadratic model [Y=(6.55±6.83)×10?D+(3.72±0.22)×10?D², P=0.922] except for linear model(P=0.067). As in the case of neutron data, the best fits was obtained to the linear model [Y=(6.12±0.17)×10?³ D-022, P=0.987] and good fits were obtained to power-law[Y=(5.36±3.02)×10?⁴D??, P=0.601] and linear-quadratic model [Y=(2.43±0.70)×10?³D+(1.21±0.39)×10?D², P=0.415], except for quadratic model (P<0.005). The relative biological effectiveness(RBE) of neutron compared with γ-ray was estimated by best fitting model. In the asymmetrical interchanges range between 0.1 and 1.5 per cell, the REE was found to be 2.714±0.408.
박히준,채윤병,차웅석,박종배,이혜정,이향숙,인창식,고형균,김수영,최일환,김강식,문정배,배기태,유경환,육근영,정병주,손인철,임사비나 WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 2004 東西醫學硏究所 論文集 Vol.2004 No.-
Background : The cun measurement System, an essential and convenient method in locating acupoints, has been widely used in the practice of acupuncture. However, traditional cun measurement has been criticized for its lack of reliability. Objectives : The purposes of this study are to determine if one cun measured by the directional methods have a consistency with that of proportional methods and to investigate which factors are related with these differences, especially in forearm. Methods : The distance between the elbow crease and the wrist crease of forearm was compared to a reference value of one cun obtained by the directional method. In this method, one cun is one third of the distance between index finger and Small finger of a subject, measured at proximal interphalangeal joint. In addition, to investigate the factors influencing the differences between these two methods, we measured the height and body weight and calculated body mass index (BMI). Finally we analyzed the factors correlated with these lengths by linear regression test. Results : The results showed that one cun obtained by the directional methods were significantly different from one cun by the proportional methods in forearm. It was demonstrated that the length acquired with the directional method was more correlated with body weight and body mass index, while the length obtained by the proportional method was more correlated with the height.
Unhealed SCR still works and tear pattern after SCR is not simple.
Kyoung Hwan Koh,Sanghyeon Lee,Sang-Jin Shin 대한견주관절의학회 2021 대한견주관절학회 학술대회논문집 Vol.2021 No.3
Introduction and Background Superior capsular reconstruction (SCR) using autogenous tensor fascia latae has been reported excellent structural and clinical outcome. However, most of SCR other than Japan are performed with acellular dermal matrix allograft (ADM). Thus, it might lead to less favorable healing and clinical results. The purpose of this study is to show the tear pattern of SCR using ADM and investigate the correlation with clinical outcome. Material and Method From October 2017 to February 2020, 51 consecutive SCR cases in two institutions (EUSH & AMC) after inclusion and exclusion criteria were analyzed. Range-of-motion, muscle power, visual analogue scale for pain (PVAS), ASES score, and Constant score were evaluated. Achievement of minimal clinically important difference (MCID) and patient acceptable symptomatic status (PASS) of clinical scores were evaluated. Graft healing and tear pattern was evaluated on postoperative MRI. Clinical outcome according to the status of graft was compared. Results PVAS (3.8 to 0.6), ASES score (56.7 to 85.9), and Constant score (57.6 to 68.4) were improved postoperatively. Graft tear can be classified as ‘healed (intact)’, partial tear, and complete tear. 36 cases (70.6%) showed healed graft. 9 (17.6%) cases had 2 glenoid, 5 humeral, and 2 both-side partial tear. 6 (11.8%) cases revealed 5 glenoid and 1 humeral side complete tear. There was no both-side complete tear and midsubstance tear. There were no differences in rangeof-motion, muscle power, clinical scores, and satisfaction. However, odds ratio for MCID of PVAS and ASES score were different according to the graft tear, and PASS of PVAS and ASES score was affected by graft continuity. Conclusions Tear pattern in SCR using ADM is not simple and some torn SCR still works if the continuity is maintained despite the partial tear of graft.
Surgical Treatment of Olecranon Fractures
Kyoung-Hwan Koh,Hyoung-Keun Oh 대한견주관절의학회 2017 대한견주관절학회지 Vol.20 No.1
Since the olecranon fractures are caused by relatively low-energy injuries, such as a fall from standing height, they are usually found without comminution. Less commonly they can be developed by high-energy injuries and have severe concomitant comminution or injuries to surrounding structures of the elbow. Because the fracture by nature is intra-articular with the exception of some avulsion-type fracture, a majority of olecranon fractures are usually indicated for surgical treatment. Even if there is minimal displacement, surgical treatment is recommended because there is a possibility of further displacement by the traction force of triceps tendon. The most common type of olecranon fracture is displaced, simple non-comminuted fracture (that is, Mayo type IIA fractures). Although tension band wiring was the most widespread treatment method for these fractures previously, there is some trends toward fixation using locking plates. Primary goal of the surgery is to restore a congruent joint and extensor mechanisms by accurate reduction and stable fixation so that range of motion exercises can be performed. The literature has shown that good clinical outcomes are achieved irrespective of surgical fixation technique. However, since the soft tissue envelope around the elbow is poor and the implants are located at the subcutaneous layer, implant irritation is still the most common complication associated with surgical treatment.
Kyoung Hwan Koh,Dong Ju Shin,Seong Mun Hwang 대한견주관절의학회 2019 대한견주관절의학회지 Vol.22 No.3
We experienced acromial erosion and subsequent fracture after the treatment of Rockwood type V acromioclavicular dislocation with hook plate and coracoclavicular ligament augmentation. It was treated by using a surgical technique to address an acromial fracture and subsequent losses of reduction in acromioclavicular joint with two trans-acromial cortical screws (crossbar technique). The reduction state of acromioclavicular joint could be maintained by these two screws. Our crossbar technique could be considered as a good salvage procedure for the reduction loss caused by cutout or significant erosion of acromion after insertion of clavicular hook plate.
고경환(Kyoung Hwan Koh)·박영환(Young Hwan Park)·조철구(Chul Koo Cho)·류성열(Seong Yul Yoo) 대한방사선종양학회 1988 Radiation Oncology Journal Vol.6 No.1
Twenty seven lesions of 25 patients with locally advanced malignant tumors were treated with combined hyperthermia introduced by microwave and ultrasound and radiotherapy. Most of all patients were failed with previous conventional therapeutic trial. Hyperthermia had been done immediately after radiotherapy, twice a week. 43℃ for one hour and radiotherapy had been done 5 fractions per week with fraction size of 2 Gy upto 30 to 60 Gy. Conclusions are as follows. 1. Total response rate (PR+PR) to thermoradiotherapy with microwave and ultrasound was 81%. 2. Tumor depth, minimum temperature of tumor center, number of heat fraction and radiation dose were statistically significant factors affecting response. 3. Hyperthermia wiht microwave and ultrasound can be used efficiently to control locally advanced malignant disease whether previously received near tolerance dose of radiotherapy or not.