http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
승모판막협착증의 평가방법으로서의 연속파 Doppler 심초음파도와 심도자법의 비교연구
김승관(S . G . Kim),박옥규(O . K . Park),강정채(J . C . Kang),박종춘(J . C . Park),정명호(M . H . Jeong),양승진(S . J . Yang),신순철(S . C . Shin),박상진(S . J . Park) 대한내과학회 1987 대한내과학회지 Vol.33 No.3
N/A In order to evaluate the feasibility of the noninvasive continuous wave Doppler (CWD) echocardiographic technique in evaluating transmitral pressure gradient and the effective mitral valve area, the 17 patients with pure or dominant mitral stenosis were examined by CWD echocardiography and by cardiac catheterization technique. By CWD technique mean and peak transmitral pressure gradient were measured as 9.5±4.0 mmHg, 13.9±4.9mrnHg respectively, and the effective mitral valve area was calculated as 0.62±0.16 cm², while by standard fluid filled catheter system the mean diastolic pressure gradient between the pulmonary capillary wedge position and the left ventricle was measured as 12.2±4.1mmHg, and effective mitral valve area by Gorlin and Gorlin formula was calculated as 0.66±0,39 cm. Each of the mean and peak diastolic pressure gradient by CWD was significantly correlated with the pressure gradient measured by cardiac catheterization technique (r=0.61, r=0,55, p<0.05, p<0.05, repectively). Effective mitral orifice areas measured by either of the technique were well correlated (r=0.73, p<0.02). We concluded that noninvasive CWD technique could be an alternative method to the cardiac catheterization in quantitating the severity of mitral stenosis.
함영복(Y. B. Ham),최준혁(J. H. Choi),박중호(J. H. Park),윤소남(S. N. Yun),박상진(S. J. Park) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
This paper presents a novel energy recoverable hydrostatic pressure exchanger to apply the sea water desalination equipments. In a reverse osmosis (RO) system for desalting sea water, more than 70 percent of the supplied sea water (brines) which were impassable RO membrane are bypassed, resulting in a high energy losses. In this paper, the hydrostatic pressure exchanger which consists of a embedded water hydraulic motor and water hydraulic pump was proposed and investigated in order to recover the energy of the bypassed brines. The pressurized brines are supplied to the embedded water hydraulic motor as power sources and the water hydraulic pump is driven by the output torque of the embedded motor, as a result, the energy of the bypassed brines can be recovered. To examined the optimal volumetric displacement of the embedded water hydraulic motor, the simulation model was constructed using the AMESim<SUP>®</SUP> commercial software and experiments. Through results of simulation and experiment, the feasibility of energy recovery effect on the proposed hydrostatic pressure exchanger was investigated.