• 한국운동역학회지
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• 제17권1호
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• pp.185-190
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• 2007

The purpose of this study was to investigate the effects that breathing, thoracic and abdominal, had on the smoothness while performing ballet pour de bra. Five skilled ballet dancers(age: $24{\pm}1$, height: $163.4{\pm}2.88$, weight: $44.4{\pm}1.34$) with experience of over 10 years participated in this study. Each participant performed the ballet movement three times with abdominal respiration and with thoracic respiration. The kinematic data was recorded at 60 Hz with three digital cameras (Sony VX-2100). The pour de bra movement consists of two phases, up and down. The up phase is defined as the movement from the en bas through the en avant to the en haut. The down phase is defined as the movement from the en haut through the $\grave{a}$ la seconde to the en bas. During these two phases the Jerk Cost (JC) factor was calculated for the shoulder, elbow and wrist to quantify the smoothness. The group who performed the movement while abdominal respiration had a lower JC factor and so it was concluded that while abdominal respiration the smoothness of the movement was increased as opposed to the thoracic respiration.

• 센서학회지
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• 제17권6호
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• pp.447-453
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• 2008

Respiration rate is one of the important vital signs. Photo-plethysmography (PPG) measurement especially on a finger has been widely used in pulse oximetry and also used in estimating respiration rate. It is well known that PPG contains respiration-induced intensity variation (RIIV) signal. However, the accuracy of finger PPG method has been controversial. We introduced a new technique of enhancing motion artifact by respiration. This was achieved simply by measuring PPG on the thorax. We examined the accuracy of these two PPG methods by comparing with two existing methods based on thoracic volume and nostril temperature changes. PPG sensing on finger tip, which is the most common site of measurement, produced 6.1 % error. On the other hand, our method of PPG sensing on the thorax achieved 0.4 % error which was a significant improvement. Finger PPG is sensitive to motion artifact and it is difficult to recover fully small respiratory signal buried in waveform dominated by absorption due to blood volume changes. Thorax PPG is poor to represent blood volumes changes since it contains substantial motion artifact due to respiration. Ironically, this inferior quality ensures higher accuracy in terms of respiration measurement. Extreme low-cost and small-sized LED/silicon detector and non-constrained reflection measurement provide a great candidate for respiration estimation in ubiquitous or personal health monitoring.

• 생명과학회지
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• 제20권5호
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• pp.723-728
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• 2010

복식호흡은 혈압의 하강이나 심리적 진정 효과를 위한 이완 요법으로 사용되고 있는데, 이는 복식호흡이 자율신경계에 영향을 미치기 때문이다. 그러나 복식호흡으로 인한 심장의 전위 변화에 대해서는 연구가 전무하다. 따라서 본 연구에서는 복식호흡을 할 때에 심전도상의 변화를 건강한 젊은 남자 10명(평균$22.40{\pm}2.5$세)과 여자 10명(평균 $20.9{\pm}0.9$세)을 대상으로 알아보고자 하였다. 본 연구의 결과, P, R, T 진폭과, QTc 간격이 남녀 모두에서 복식호흡과 흉식호흡간의 차이가 없었다. 그러나 복식호흡 시에 PR 간격은 남자가 여자보다 유의하게 길었다. 심장 전기축에서 P축은 호흡 방식에 따라서 영향을 받지 않았으나, 남자에서는 복식호흡에서 심장의 QRS축이 증가하였고, 여자는 T 전기축이 증가하였다. 따라서 복식호흡은 심실이 탈분극과 이완되는 재분극 시의 전기축에 유의한 영향을 미치는 것으로 나타났다.

• Journal of Chest Surgery
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• 제39권10호
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• pp.782-785
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• 2006

복부 대동맥류의 수술에 있어서 만성 폐쇄성 폐질환은 수술 사망에 유의한 영향을 미치는 위험 인자로 알려져 있다. 따라서 수술 후 호흡기 합병증을 줄이기 위해서는 강제적 기계 호흡을 줄이고 가능한 환자의 자발 호흡을 유지하는 것이 수술 결과를 향상시킬 수 있다. 본 증례에서는 복부 통증을 주소로 내원한 77세의 남자 환자로 수술 전 검사에서 약 9 cm크기의 복부 대동맥류가 발견되었으나, 심한 만성 폐쇄성 폐질환이 동반되어 수술 후 사망률이 높을 것으로 예상된 경우에서 경막외 마취등을 통해 환자의 자발 호흡을 유지한 상태로 복부 대동맥류 절제 및 인조혈관 삽입술을 시행하여 좋은 결과를 얻을 수 있었다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.2053-2054
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• 2011

Cardiopulmonary resuscitation(CPR) is performed by artificial ventilation and thoracic compression for the patient under emergent situation to maintain at least the minimum level of respiration and blood circulation for life survival. Good quality CPR requires monitoring respiration. We developed a system for continuous monitoring respirational signal while CPR, using respirational airflow sensor for CPR. Signal extraction circuit obtains pressure signal while CPR. Obtained signal would be performed analog-digital conversion and changed to airflow value by characteristic formula. Single inspiration and expiration were considered a period. Detected valid data were displayed LCD.

• Journal of Chest Surgery
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• 제38권1호
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• pp.80-83
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• 2005

43세 남자 환자가 호흡곤란과 호흡시 나타나는 천명음을 주소로 내원하였다. 환자는 과거력상 1년전에 식도파열로 인하여 식도격리술과 식도위문합수술을 시행받았다. 흉부 컴퓨터 단층촬영상 기관을 압박하는 식도점액류가 마치 종격동 종양처럼 나타났다. 수술은 우측 개흉술을 통하여 식도를 절제하였다. 저자들은 이를 치험하였기에 보고하는 바이다.

• 감성과학
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• 제24권4호
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• pp.69-78
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• 2021

요즘은 건강을 위한 스마트 헬스 케어 웨어러블의 개발이 가속화되는 시대이다. 그 중 활발한 연구 분야 중 하나인 EMS 전기자극을 활용한 웨어러블 제품이 많이 출시되었다. 하지만 연구되거나 출시되어있는 EMS 웨어러블은 근육의 세분화에 집중하지 못한 포괄적인 전신 슈트나 복부 전체를 덮는 벨트 형식으로 출시되어있다. 이에 본 연구에서는 특정 근육을 세분화시킨 EMS 패턴을 적용하고 복압 벨트에 호흡을 측정할 수 있는 스트레치 센서를 부착하여 두 가지 호흡법을 활용해 연구를 진행하고자 한다. 측정방법은 들숨과 날숨으로 실험을 진행하며 대상자는 건강한 신체의 20대 남성 10명을 대상으로 진행했다. 본 연구의 결과 흉식호흡과 복식호흡 모두 센서의 민감도는 5mm, 3mm, 기본 센서 순으로 센서별 순위 결과를 확인할 수 있었고 EMS 복압 벨트를 통해 전기자극을 적용 전, 후로 나누었을 때 전기자극을 적용한 후 호흡의 활성화가 향상되었음을 알 수 있었다. 연구의 결론은 2가지 호흡법을 신체 기능적 근거로 제작한 2가지 패턴으로 인해 호흡법에 적합한 전기자극을 적용 시 적용하지 않았을 때 보다 3가지 센서로 호흡 활성화 효과와 센서 간 민감도 차이를 확인할 수 있었다. 본 연구 결과를 기반으로 후속 연구에서는 EMS 패턴과 스트레치 센서가 통합된 의복형 웨어러블 제품에 실시간 모니터링이 가능한 호흡 스마트 의류를 개발하고자 한다.

• 한국임상수의학회지
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• 제40권2호
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• pp.104-112
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• 2023

The change in the position of the abdominal organs due to movement by respiration is one of the reasons behind inaccurate irradiation of organs during radiotherapy (RT). Although studies in human medicine have revealed on the respiratory movements of abdominal organs, there is little information and no reference data for dogs. The purpose of this study was to establish the reference values of abdominal organs movement in various postures using computed tomography (CT), and to compare the movements of organs between dorsal recumbency and ventral, right and left lateral recumbency during respiration. CT images for kidney, adrenal gland, medial iliac lymph node, urinary bladder, gallbladder, liver, stomach, and thoracic and lumbar vertebral body of five beagle dogs were acquired. The movements of organs were evaluated by comparing the end-expiratory and end-inspiratory images. Movements of the organs were evaluated by dividing it into right-to-left, dorsal-to-ventral, and cranial-to-caudal directions. The movements of abdominal organs according to the change in postures and respiration were establish. The movement of the bilateral organs was the least when the organs were in the downward position (p < 0.017). The movement of cranial-to-caudal direction was greater than the movement of the other directions in most of the organs. Data obtained in this study may be useful in selecting the appropriate posture that can reduce the movements of organs to be treated with RT, and the data could be useful for setting the planning target volume to consider the movements of the abdominal organs by respiration.

• 대한방사선기술학회지:방사선기술과학
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• 제1권1호
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• pp.25-29
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• 1978

This study was done for the purpose of graphing rather improved technique through reviewing conventional technigue of the thoracic vertebrae lateral projection. The roentgenographic images which were taken at Korea University Hospital from January, 1976 to December, 1977 were observed for this study. The results were as belows: 1. The quality of diagnostic radiograph turned out that good is 21.4%, intermediate is 40.7% and poor is 37.9%. 2. The poor quality of images the caused by overlapping shadows(59.6%), incorrect position of patients(15.0%), motion of patients(7.5%), over-exposure(8.3%), under-exposure(6.7%) and processing faults(2.9%). The images were taken by following four methods of experiments were campared and researched in order to improve the problems of conventional technigues which were came out on the poor radiographes. 1. (Method 1) Low mA-long time exposure during normal respiration 2. (Method 2) Short time exposure during normal respiration 3. (Method 3) After deep inspiration, short time exposure during expiration 4. (Method 4) After full expiration, short time exposure during inspiration. In a result of the above experiments, it was found that the improved image could be got from the method 3.

• Journal of Chest Surgery
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• 제13권3호
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• pp.274-279
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• 1980

A 21 years old male student was admitted because of mediastinal mass that was noticed in routine physical examination. He complained progressive hoarseness, mild dysphagia, and anterior chest pain on deep respiration. This mediastinal mass was diagnosed as aortic aneurysm involving ascending, transverse, and descending thoracic aorta with aid of aortogram. Total prosthetic replacement of aneurysm was performed successfully using extracorporeal circulation and hypothermia. For myocardial protection during aortic cross clamping, cardioplegic solution was used and topical myocardial cooling was also adapted For simplicity of cardiopulmonary bypass, Y-shaped connectors took cerebral perfusion catheters to the main perfusion line beyond the arterial pump. Total bypass time was 219 minutes, and aortic cross clamp time was 104 minutes. Recovery was uneventful except respiratory insufficiency for first 4 days. Isotope aortogram checked on post operative 30th day showed normal aortic configuration. He was discharged on post operative 35th day. A follow-up chest X-ray study 5 months later showed nearly normal anatomy.