• Clinics in Shoulder and Elbow
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• 제27권1호
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• pp.11-17
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• 2024

Background: Rotator cuff tears are often associated with synovitis, but the ability of noninvasive ultrasonography to predict the severity of synovitis remains unclear. We investigated whether ultrasound parameters, namely peak systolic velocity in the anterior humeral circumflex artery and Doppler activity in the glenohumeral joint and subacromial space, reflect synovitis severity. Methods: A total of 54 patients undergoing arthroscopic rotator cuff repair were selected. Doppler ultrasound was used to measure peak systolic velocity in the anterior humeral circumflex artery and Doppler activity in the glenohumeral joint and subacromial space, and these values were compared with the intraoperative synovitis score in univariate and multivariate analyses. Results: Univariate analyses revealed that tear size, peak systolic velocity in the anterior humeral circumflex artery, and Doppler activity in the glenohumeral joint were associated with synovitis in the glenohumeral joint (P=0.02, P<0.001, P=0.02, respectively). In the subacromial space, tear size, peak systolic velocity in the anterior humeral circumflex artery, and Doppler activity in the subacromial space were associated with synovitis severity (P=0.02, P<0.001, P=0.02, respectively). Multivariate analyses indicated that tear size and peak systolic velocity in the anterior humeral circumflex artery were independently associated with synovitis scores in both the glenohumeral joint and the subacromial space (all P<0.05). Conclusions: These findings demonstrate that tear size and peak systolic velocity in the anterior humeral circumflex artery, which can both be measured noninvasively, are useful indicators of synovitis severity.

• Journal of Magnetics
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• 제20권1호
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• pp.47-51
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• 2015

We measured radial arterial pulse signals using a prototype of a clip-type pulsimeter equipped with a permanent magnet and a Hall device, which produced signals through a voltage-detecting circuit. The systolic peak time and the reflective peak time for a temporally pulsed signal were analyzed for an arbitrary pulse wave at one position of a small permanent magnet. The measured value of the peripheral pulse wave velocity was about 1.25-1.52 m/s, demonstrating the accuracy of this new method. To measure the peripheral blood flow velocity, we simultaneously connected the radial artery pulsimeter to a photoplethysmography meter. The average value of the peripheral blood flow velocity was about 0.27-0.50 m/s.

• 한국임상수의학회지
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• 제36권3호
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• pp.155-158
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• 2019

Morphologic changes or functional impairments of the papillary muscle (PM) can influence mitral valve competence. The purpose of this study was to investigate PM size and contractile function using two-dimensional and color tissue Doppler echocardiography in normal dogs. 35 unsedated Beagle dogs without cardiovascular disease were examined. The vertical (VD) and horizontal diameter (HD) of the posterior and anterior PM was measured at end-diastole, and compared with the thickness of the left ventricular posterior wall (LVPWd). Longitudinal systolic movement of the PM was quantified as myocardial velocity and strain using tissue Doppler. The VD, HD, and ratios (VD/LVPWd, HD/LVPWd, VD/HD) were significantly greater in the posterior than anterior PM (P < 0.001). The VD and HD of posterior PM and the HD of anterior PM were significantly correlated with LVPWd (r = 0.47, 0.44, and 0.42, respectively). Body weight was significantly correlated with VD of posterior PM (r = 0.37). The peak systolic tissue velocity of the PM was $4.93{\pm}1.25cm/sec$ and peak strain was $-30.83{\pm}11.92%$. PM size and systolic function can be quantitatively assessed using two-dimensional and tissue Doppler. The establishment of these objective PM measurements may be useful to evaluate morphological and functional abnormalities of the canine PM.

• Korean Journal of Radiology
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• 제1권1호
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• pp.11-18
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• 2000

Objective: To evaluate the hydrodynamic changes occurring in cerebrospinal fluid (CSF) flow in cervical spinal stenosis using the spatial modulation of magnetization (SPAMM) technique. Materials and Methods: Using the SPAMM technique, 44 patients with cervical spinal stenosis and ten healthy volunteers were investigated. The degree of cervical spinal stenosis was rated as low-, intermediate-, or high-grade. Low-grade stenosis was defined as involving no effacement of the subarachnoid space, intermediate-grade as involving effacement of this space, and high-grade as involving effacement of this space, together with compressive myelopathy. The patterns of SPAMM stripes and CSF velocity were evaluated and compared between each type of spinal stenosis and normal spine. Results: Low-grade stenosis (n = 23) revealed displacement or discontinuity of stripes, while intermediate- (n = 10) and high-grade (n = 11) showed a continuous straight band at the stenotic segment. Among low-grade cases, 12 showed wave separation during the systolic phase. Peak systolic CSF velocity at C4-5 level in these cases was lower than in volunteers (p < .05), but jet-like CSF propulsion was maintained. Among intermediate-grade cases, peak systolic velocity at C1-2 level was lower than in the volunteer group, but the difference was not significant (p > .05). In high-grade stenosis, both diastolic and systolic velocities were significantly lower (p < .05). Conclusion: Various hydrodynamic changes occurring in CSF flow in cervical spinal stenosis were demonstrated by the SPAMM technique, and this may be a useful method for evaluating CSF hydrodynamic change in cervical spinal stenosis.

• The Korean Journal of Physiology and Pharmacology
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• 제4권3호
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• pp.253-261
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• 2000

Head-out water immersion induces marked increase in the cardiac stroke volume. The present study was undertaken to characterize the stroke volume change by analyzing the aortic blood flow and left ventricular systolic time intervals. Ten men rested on a siting position in the air and in the water at $34.5^{circ}C$ for 30 min each. Their stroke volume, heart rate, ventricular systolic time intervals, and aortic blood flow indices were assessed by impedance cardiography. During immersion, the stroke volume increased 56%, with a slight (4%) decrease in heart rate, thus cardiac output increased ${\sim}50%.$ The slight increase in R-R interval was due to an equivalent increase in the systolic and diastolic time intervals. The ventricular ejection time was 20% increased, and this was mainly due to a decrease in pre-ejection period (28%). The mean arterial pressure increased 5 mmHg, indicating that the cardiac afterload was slightly elevated by immersion. The left ventricular end-diastolic volume index increased 24%, indicating that the cardiac preload was markedly elevated during immersion. The mean velocity and the indices of peak velocity and peak acceleration of aortic blood flow were all increased by ${\sim}30%,$ indicating that the left ventricular contractile force was enhanced by immersion. These results suggest that the increase in stroke volume during immersion is characterized by an increase in ventricular ejection time and aortic blood flow velocity, which may be primarily attributed to the increased cardiac preload and the muscle length-dependent increase in myocardial contractile force.

• 동의생리병리학회지
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• 제26권5호
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• pp.610-614
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• 2012

This study was done to identify correlates of carotid artery ultrasonography's measurement and Inyoung pulse in college students. We measured the amplitude of Inyoung pulse, Chongu pulse, ratio of Inyoung to Chongu and ratio of Chongu to Inyoung on 30 college students. Also, We measured the Distance, Diameter), RI(resistivity index), S/D(systolic, diastolic ratio), PI(pulsatility index), PSV(peak systolic velocity), EDV(End diastolic velocity), Vmean using carotid artery ultrasonography. The data was analyzed by Pearson's correlation coefficient using SAS program. The results were as follow. Results showed a positive correlation between Inyoung pulse and diameter by carotid artery. It showed a positive correlation between Inyoung pulse and S/D. Also, It showed a positive correlation between Inyoung pulse and PSV. As a result, the strength of Inyoung pulse related with the diameter of carotid artery and blood flow velocity.

• 국제물리치료학회지
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• 제11권1호
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• pp.1954-1959
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• 2020

Background: Due to aging, blood flow rate decreases, also posture and chewing habit may be changed. Objective: To identify that changes in blood velocity in the common carotid arteries (CCAs) in old persons with unilateral chewing habit (UCH) and forward head posture (FHP) in the elderly. Design: An observational cross-sectional study. Methods: Chewing habits, FHP, and CCAs velocities were assessed in 85 elderly subjects. Chewing habits were measured by visual observation. CCAs measured the peak systolic velocity (PSV), end-diastolic velocity (EDV), minimum diastolic velocity, and resistivity index. The subjects were divided into UCH and bilateral chewing habit groups depending on chewing habit. The subjects were also divided into >49 degrees and <49 degrees for comparison of blood flow between the left and right CCAs. Results: In the UCH, the chewing side had significantly higher EDV (P=.003), PSV (P=.023) than the non-chewing side. There was no significant difference in velocity between the CCAs in the FHP. Conclusion: This study shows that the blood flow velocity of the chewing side of UCH was higher, and unilateral chewing affects the CCAs velocity and thus highlight the importance of chewing habit in the elderly than head posture.

• Journal of Yeungnam Medical Science
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• 제8권1호
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• pp.63-71
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• 1991

저자들은 1990년 5월 1일부터 1991년 4월 30일까지 영남대학교 의과대학 부속병원 산부인과에 정기검진을 위해 내원한 157명의 정상 임산부를 대상으로 제대동맥에서 시행한 도플러초음파 160회의 검사 결과를 엄신 주수에 따라 분석하여 다음과 같은 결과를 얻었다. 제대동맥의 최고 수축기 혈류속도는 임신이 진행함에 따라 증가 양상을 보임으로써 임신이 증가함에 따라 제대 동맥 혈류량은 증가함을 관찰할 수 있었다. 임신이 진행함에 따라 제대태반 순환계 말초 저항이 점차적으로 감소함으로 인해 제대동액 이완기말 혈류속도도 중가 양상을 보였다. S/D ratio는 최고 수축기 혈류속도의 증가에도 불구하고 이완기말 혈류속도의 점차적인 증가로 인하여 임신이 진행함에 따라 오히려 감소함을 관찰할 수 있었다. 임신이 지속함에 따라 PI, RI도 감소하는 양상을 보였다.

• 대한임상검사과학회지
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• 제42권3호
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• pp.155-160
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• 2010

Transcranial Doppler ultrasonography (TCD) allows measurement of blood flow velocity to be made from the basal intracerebral vessels. Blood flow velocity in TCD is highly affected not only by blood vessel diameter, blood flow volume, blood viscosity, but also age and sex. Therefore, the study is focused on the correlation between TCD measurement index and sex/age. Subjects were 214 (male 147, famale 67) who had TCD for headache and stroke evaluations at Dongguk University Ilsan Hospital neurology department from December 2009 to April 2010. Sex did not show significant differences with mean flow velocity (MFV), peak systolic flow velocity (PSFV), end diastolic flow velocity (EDFV), pulsatility index (PI) and resistance index (RI) in middle cerebral artery (MCA). Although age also did not show significant differences with MFV and PSFV, EDFV has statistically decreased with age, and PI and RI has statistically increased with age. In addition, age showed significant correlation with MFV, EDFV, PI and RI, but not with PSFV. Therefore, TCD is definitely correlated with age and sex, so that those influencial factors must be considered when being tested.

• Journal of Yeungnam Medical Science
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• 제16권2호
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• pp.309-317
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• 1999

만성 신부전증은 지속적인 혈액투석을 하고 있음에도 다양한 형태의 좌심실 기능부전을 보이며, 특히 좌심실 수축기능이 정상이면서 이완기능 장애만으로 임상적인 심부전증 증상인 폐부종 등이 나타나기도 한다. 또한 혈액투석 후 급격한 혈액량의 변화가 생기므로 적정 심박출을 유지하기 위하여 좌심실 이완기능이 중요한 역할을 하는 것으로 알려져 있다. 저자들은 혈액투석이 좌심실의 수축 및 이완기능에 미치는 영향을 알아보기 위해 Doppler 심초음파도 지표들을 이용해 투석 전후에 좌심실 수축 및 이완기능의 변화를 비교분석 하였다. 심초음파 검사상 좌심실 수축기능 부전이 없고(fractional shortening>30%), 심장 판막질환이나 심근 국소벽 운동장애가 없으며 정상 심율동을 가진 만성 신부전증 환자 30명(남자 15명, 연령$45{\pm}10$세)을 대상으로 이면성 심초음파도 검사를 시행하고, 혈액투석 전후의 좌심실 용적, 좌심실 수축기능 및 Doppler 심초음파도를 이용한 좌심실 이완기능 지표들의 변화를 관찰하여 분석하였다. 혈액투석 후 맥박은 약간 증가하는 소견을 보였으나 통계적 유의성은 없었고, 혈압은 수축기 혈압 및 이완기 혈압의 감소가 있었다. 혈액투석 후 좌심방 및 좌심실 확장기 내경의 크기가 감소했으나 좌심실 수축기 내경의 크기는 변화가 없었고, 심실중격 및 좌심실 후벽의 두께는 변화가 없었다. 좌심실 수축기능 지표인 Fractional shortening, 좌심실 구혈율, 좌심실 박출지수, mean VCF은 투석 전후에 유의한 변화를 보이지 않아 혈액투석으로 인한 좌심실 수축지표의 변화는 관찰되지 않았다. 혈액투석 후 좌심실 이완기능지표의 변화로서 peak E velocity는 현저히 감소하였고, peak A velocity의 변화는 통계적 유의성이 없었다. E/A ratio가 감소하였고, IVRT(Isovolumic Relaxation Time)의 증가가 있었으나, DT(Deceleration time)의 변화는 없었다. 수축기 및 이완기 기능 지표로 사용되는 IMP(Index of Myocardial Performance)는 좌심실 구혈율의 증가와 함께 현저히 증가되었다. 이상의 결과로 혈액투석 후 전부하의 감소에 따른 좌심실 이완기능 지표의 변화로서 E파속 및 E/A비의 감소, IVRT 증가가 나타나고 수축기 기능 및 이완기 기능의 지표로 이용되는 IMP의 증가가 발생하므로, 혈액투석 후 흔히 좌심실 이완기능 장애의 악화가 발생하는 것으로 추정된다.