• 제목/요약/키워드: Doppler Effects

검색결과 294건 처리시간 0.021초

전기치료가 긴장형 두통환자의 뇌 혈류 속도에 미치는 영향 (Effects of Electrotherapy on Blood Velocity of Cranial Artery in Tension-Type Headache subjects)

  • 박래준;김진상;이인학;박장환;한동욱
    • The Journal of Korean Physical Therapy
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    • 제12권3호
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    • pp.349-359
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    • 2000
  • The aim of study was to evaluated the possible role of cranial artery velocity in headache pathogenesis. The present study was studied of five headache(F=5. Mean $age=29.80\pm6.76yrs$) were compared to 4 controls(F=4, Mean $age=29.00\pm5.48yrs$). Transcranial doppler ultrasonography(TCD) is a new non-invasive and easily applicable method to evaluate flow velocities of the intracranial and extracranial cerebral arteries. TCD was performed with standard method to measure the mean Flow Velocity(MFV) of the middle and posterior cerebral arteries, the internal carotid artery, the vertebral and the basilar artery. We reviewed the whole TCD results performed at Taejon Veterans Hospital from October. 11. 2000 to November. 10. 2000. Mean flow velocities in headaches and controls at their 6 decades are $28.00\pm3.61cm/sec$ and $41.25pm1.71cm/sec$ in lent PCA (P<0.01), $50,000\pm23.07cm/sec$ and $82.75\pm15.59cm/sec$ in right MCA(P<0.05), $26.20\pm4.82cm/sec$ and $45.50\pm4.51cm/sec$ in fight PCA(P<0.01). $26.60\pm4.56cm/sec$ and $38.25\pm4.92cm/sec$ in right VAC(P<0.01). After treatment for 2 weeks, mean of velocity on pre treatment and post treatment and post treatment are $28.00\pm3.61cm/sec$ and $38.20\pm5.81cm/sec$ in left PCA (P<0.05), $26.20\pm4.827cm/sec$ and $39.20\pm5.54cm/sec$ in right PCA(P<0.05), $40.60\pm9.18cm/sec$ in right VA(P<0.01). It is concluded that Electrical Therapy for two weeks was effected to promote Mean Flow of Velocity in cranial artery. Mean of velocity in cranial artery with headaches observed in this study was lower than controls, but MFV was promote after treatment for 2 weeks.

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아문(瘂門)(GV15)의 홍화약침(紅花藥針)이 백서(白鼠)의 뇌혈류역학(腦血流力學) 변동(變動)에 미치는 영향(影響) (Effects of Aqua-Acupuncture of Carthami Flos(GV15) on the Changes of Cerebral Hemodynamics in Rats)

  • 안영선;위통순;조명래;채우석;윤여충
    • Journal of Acupuncture Research
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    • 제19권5호
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    • pp.92-111
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    • 2002
  • Objective : Carthami Flos has been used as a herb to promote blood circulation to remove blood stasis in oriental medicine for many centuries, and Amun(GV15) has been used as a meridian point to treat apoplexy etc. To investigate treatment of cerevral vascular disease(CVA) by promoting blood circulation and removing blood stasis(活血化瘀法), we observed the experimental effects and mechanism of auqa-acupunture of Carthami Flos(ACF) injected into GV15 on cerevral hemodynamics and cardiovascular system of rats. Method : Aqua-acupuncture of Carthami Flos(ACF) was injected into GV15, and then we investigated experimental effects and mechanism of ACF on the cerebral hemodynamics[regional cerebral blood flow(rCBF), pial arterial diameter(PAD), meal arterial blood pressure(MABP)] and cardiovascular system[cardiac muscle contractile force(CMF), heart rate(HR)I by pretreatment with methylene blue(MTB) and indomethacin(IDN). The changes in rCBF, MABP, CMF and HR were tested by Laser Doppler Flowmetry(LDF), and the changes in PAD was determinated by video microscopy methods and video analyzer. Results :The results were as follows in normal rats ; The changes of rCBF and PAD were significantly increased by ACF($120{\mu}{\ell}/kg$) in a injected time-dependent manner, but MABP was not changed by ACF. The changes of cardiovascular system were increased by ACF in a injected time-dependent manner. And pretreatment with MTB was significantly inhibited ACE induced increase of rCBF and PAD, and was decreased ACF induced increase of HR. And pretreatment with IDN was increased ACF induced MABP and CMF. And the results were as follows in cerebral ischemic rats ; The changes of rCBF was increased stabilizly by treatment with ACF($120{\mu}{\ell}/kg$) in during the period of cerebral reperfusion, but pretreatment with MTB was increased ACF induced increase of rCBF during the period of cerebral reperfusion. The results were as follows in normal rats ; The changes of rCBF and PAD were significantly increased by ACF($120{\mu}{\ell}/kg$) in a injected time-dependent manner, but MABP was not changed by ACF. The changes of cardiovascular system were increased by ACF in a injected time-dependent manner. And pretreatment with MTB was significantly inhibited ACF induced increase of rCBF and PAD, and was decreased ACF induced increase of HR. And pretreatment with IDN was increased ACF induced MABP and CMF. And the results were as follows in cerebral ischemic rats ; The changes of rCBF was increased stabilizly by treatment with ACF($120{\mu}{\ell}/kg$) in during the period of cerebral reperfusion, but pretreatment with MTB was increased ACF induced increase of rCBF during the period of cerebral reperfusion Conclusions : In conclusion, ACF causes a diverse response of rCBF, PAD an HR, and action of ACF is mediated by cyclic GMP. I suggested that ACF has an anti-ischemic effect through the improvement of crebral hemodynamics in a transient cerebral ischemia.

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선박소음의 수중분포에 관한 연구 (UNDERWATER DISTRIBUTION OF VESSEL NOISE)

  • 박중희
    • 한국수산과학회지
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    • 제10권4호
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    • pp.227-235
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    • 1977
  • 1976년 8월 16일 (북위 $34^{\circ}27'30'$ 동경 $128^{\circ}23'15'$)과 1977넌 7월 28일(북위 $34^{\circ}47'$ 동경 $128^{\circ}53'$)에 관악산호의 선박소음이 r.p.m에 따라 항해시와 정선시 (기관의 공회전)의 소음압이 해중에 분포하는 것을 조사 연구한 결과를 요약하면 다음과 같다. 1. 기관의 r.p.m.과 음압관계 r.p.m.과 음압의 증가비는 100 : 1이었으며 r.p.m. 600에서 104dB로 peak를 이루었다. 2. 외현주변의 해중해압분포 A. 정선시의 기관소음압 100,102,103,104,104 dB일때 관측점 No.1에서 69,70,72,74,75 dB No.3은 No. 1에 비해 $2\~3\;dB$ 증가해 peak를 이루었고 No.5는 No.3에 비해 $10\~15\;dB$씩 감쇠되었다. 기관소음압이 최대 일때 관측점 $No.1\~No.5$에서의 음압이 투과된 백분율은 약 $78,79,80,73,70\%$였다. B. 항해시의 선박수중소음압 정선시와 같은 기관회전 조건하에서 No.2에서 69,72,75,77,78 dB로 peak를 이고 No. 1보다 $2\~3\;dB$씩 감쇠되었다. 기관 최고소음압에 대한 $No1.\~No.5$에서의 음압투과 백분율은 약 $78,81,79,77,71\%$ 였다. 3. 항해시와 정선시의 외현해중 음압 peak점에서의 음압을 비교하면 항해시가 1 dB 높았다. 4. 선박이 멀어질 때 0 m(관측점 통과시)에서 67 dB, 1,400 m에서 56 dB였다. 5. 선박이 가까워질 때 거리 0 m에서 72 dB, 1,400 m에서 57 dB로서 멀어 질때와 비교하면 0m에서 5 dB, 600 m에서 2 pB씩 증가한 도플러 효과가 일어남을 알 수 있다. 6. r.p.m.을 600으로 하여놓고 스크류를 돌리지 않고 기관만 공회전 시킬 때 수평거리 20 m인 곳의 No.7에서 수심 10 m마다 50 m까지의 음압은 68,75,62,59,55,51 dB였다.

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카롤리병의 방사선학적 진단에 대한 고찰 (A Study on the Radiographic Diagnosis of Caroli's Disease)

  • 홍여진;김민아;김수빈;송진주;장경훈;전민철;한만석
    • 한국방사선학회논문지
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    • 제17권3호
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    • pp.385-392
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    • 2023
  • 카롤리병은 섬유낭성 간질환이다. 상염색체 열성 장애로 담관의 선천적 다발성 확장이 특징이다. 카롤리병을 진단하는 방법으로 전산화단층촬영, 자기공명영상 검사, 담관 조영술, 초음파 검사가 있다. 전산화단층촬영검사는 섬유다낭성 간 질환을 감지하고 구별하는데 필수적이며, 간 내 담관의 확장을 판별하는 데 유용하다. 하지만 조영제를 사용함으로써 일어날 수 있는 부작용에 대한 인지가 필요하다. 자기공명영상검사는 대표적으로 자기공명담췌관조영술 방법을 이용한다. 비침습적 검사로 환자의 고통을 경감할 수 있고, 담췌관부의 해부학적 구조와 병변 유무를 쉽고 빠르게 관찰이 가능하다. 담관 조영술은 비대해진 담관 전체에 걸친 여러 낭성 확장을 직접 시각화할 수 있는 효과적인 진단 방법이다. 하지만 이 시술 또한 침습적인 시술이므로 진단이 아닌 치료 목적으로 권장된다. 초음파 검사는 전산화단층촬영과 유사한 소견을 확인할 수 있다. 간동맥 뿌리는 기존의 그레이 스케일 초음파에서 증명하기 쉽지 않다. 하지만 관 내 혈관 뿌리를 가진 확장된 담관을 묘사할 수 있을 뿐만 아니라 관 내 색상 도플러 신호를 쉽게 식별할 수 있다는 점에서 임상적 가치를 갖고 있다. 최근엔 영상진단의 발전으로 전산화단층촬영 검사, 자기공명영상 검사, 담관 조영술, 초음파 검사 등으로 조기 진단이 가능해졌다. 조기 진단을 통해 치료 후에 장기적인 예후가 개선될 수 있도록 영상 진단 발전에 더욱 기여하고자 각 검사별 카롤리병에 대하여 어떠한 양상이 나타나는지 고찰하였다