Евгений Илюхин писал(а):
Эта тема создана для обмена тезисами (абстрактами) на русском и английском языках и их обсуждения. Перевод или пересказ приветствуются, но необязательны.
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Начнем с публикаций в японской периодике на 19.01.2007:
Non-Invasive Vascular Measurement Using Multislice CT: Basic Phantom Study
Kazuhiro Matsumoto, Masahiro Jinzaki, Kozo Sato, Sachio Kuribayashi, and Masae Shinya*
Department of Diagnostic Radiology, Keio University School of Medicine, Tokyo, Japan
*GE Yokogawa Medical Systems, Tokyo, Japan
The use of three-dimensional CT angiography using multislice CT has become common in the assessment of iliofemoral arteries. Recently, new software known as Advanced Vessel Analysis (AVA) has been developed for automatic measurement of the vascular lumen. AVA makes it possible to display true cross sectional images perpendicular to the central axis and measure the diameter and cross sectional area on a workstation. The purpose of this study was to evaluate the accuracy of AVA by measuring vascular phantoms, in comparison with intravascular ultrasound (IVUS). We used acrylic acid resin cylinders as vascular phantoms. Vascular phantoms were scanned by 8-channel multislice CT, and the inner diameters (maximum and minimum) were measured by AVA. IVUS was able to measure the phantom diameters with a high level of accuracy, while AVA had a tendency to overestimate phantom diameters slightly. Further, it was considered that certain factors, including the direction of the vessel and density of the inner lumen, influenced the measurement values obtained by AVA. We need to recognize the characteristic trends of AVA and to use the appropriate scanning method to improve accuracy.
J Jpn Coll Angiol, 2003, 43: 35-39
Key words: Multislice CT, Peripheral Artery, Automatic measurement
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Non-invasive Functional Assessment of Deep Vein Thrombosis
Kenji Hida, kimihiro Kurose, Junichi Tanaka, Noriyuki Sasaki, Hiroo Shikata, Shigeru Sakamoto, and Junichi Matsubara
Department of Thoracic and Cardiovascular Surgery Kanazawa Medical University
The purpose of this study was to evaluate the venous function of the lower limbs with deep vein thrombosis (DVT) and to compare it with that of normal limbs using air plethysmography(APG) and strain-gauge plethysmography(SPG). Thirty-three normal limbs of 26 healthy volunteers and 25 limbs of 23 patients with DVT were evaluated. The values obtained by APG were outflow fraction (OF), venous volume, venous filling index (VFI), ejection fraction (EF) and residual volume fraction (RVF). Using SPG, the waveform changes were recorded during calf muscle exercise with and without a tourniquet just below knee. The OF and EF values of DVT were lower, and the VFI and RVF values of DVT were higher than those of normal limbs. In normal limbs, calf circumference was decreased with exercise, and same waveform was recorded with a tourniquet. In DVT, calf circumference was slightly increased with exercise, and increased further with a tourniquet. APG and SPG, when used together, are more useful as noninvasive methods to evaluate lower extremity venous function.
J Jpn Coll Angiol, 2003, 43: 307-310
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Deep vein thrombosis, Noninvasive assessment, Venous hemodynamics of the lower extremity, Air plethysomgraphy, Strain gauge plethysmography
Diagnostic Utility of Air Plethysmography in Deep Vein Thrombosis
Hiromi Miwa, Koichi Yoshimura, Satoshi Saito, Koji Dairaku, Norio Akiyama, Akira Furutani, and Kimikazu Hamano
First Department of Surgery, Yamaguchi University School of Medicine
We assessed the accuracy of air plethysmography (APG) as a means of screening for deep vein thrombosis (DVT). APG was used to study 9 lower limbs with DVT (DVT group), 48 lower limbs with symptoms but normal deep veins and 75 normal lower limbs. The 1-second venous outflow (V1) and outflow fraction (OF) were significantly lower in the DVT group than in the other two groups (p<0.01), but the venous volume (VV) did not differ significantly among the three groups. When an OF of 30% was used as the cutoff point, the sensitivity of APG in detecting DVT was 100% and the specificity was 89%. These results suggest that APG is a simple, noninvasive and accurate method of screening for DVT.
J Jpn Coll Angiol, 2003, 43: 277-279
Key words: Deep vein thrombosis, Air plethysmography
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Assessment of Venous Valvular Reflux by Means of Duplex Scanning:
Sitting-cuff Distal Compression versus Sitting-manual Distal Compression
Hisao Sasaki, Yasushi Matsumoto, Shinichi Kadoya, Kengo Kawakami, Fuminori Kasashima, and Masamitsu Endo
The Institute for Clinical Research, Department of Cardiovascular Surgery, Kanazawa Medical Center, Ishikawa, Japan
The aim of this study was to study the effect of two different methods for detecting venous valvular reflux by Duplex scanning: the sitting-cuff distal compression versus the sitting-manual distal compression. The duration of deep venous valvular reflux was studied in 25 lower extremities of 18 patients with primary varicose vein. Two methods, distal cuff deflation (cuff distal compression) and distal manual milking (manual distal compression) were used to elicit reflux in the sitting position. The manual distal compression method was compared with the cuff distal compression method, whose results were used as the gold standard.
Both methods can elicit reflux. While there was a correlation between reflux durations resulted from both methods, the reflux time by the manual compression was shorter than the one by the cuff compression. There is a risk that the manual compression method fails to detect vein reflux which are recognized by the cuff compression method. The risk probability of disagreement between two methods changed with the criterion of normal reflux duration adopted in the manual compression method. The least risk probability is 0.05 in both popliteal vein and post tibial vein, when the criterion of normal reflux duration in the manual compression method is 0.8 sec.
The manual distal compression method fails to distinguish between two different kinds of reflux, which originate in compression and in release. The sitting-manual distal compression with the reflux duration criterion of 0.8 sec in normal subjects may be a substitute for the sitting-cuff distal compression.
J Jpn Coll Angiol, 2005, 45: 29-32
Key words: sitting-cuff distal compression, sitting-manual distal compression, deep vein reflux, Duplex scanning
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