摘要:

AbstractIn this investigation the weight estimation procedure of Rossavik was reassessed with particular emphasis on parameter estimation and performance over a wide weight range. Using a cross‐sectional data set (193 patients), a longitudinal data set (20 patients), and an iterative procedure, parameter estimates were obtained based solely on regression analysis. Comparison of weight estimates obtained using a function based on these parameter values with actual birth weights indicated virtually no systematic errors over a 250‐g to 4750‐g weight range and random errors (±1 SD) of 10% to 13% below 200 g and 6% to 8% above 2000 g. The weights of small‐ and large‐for‐gestational age fetuses were systematicly overestimated (4.1%) and underestimated (−3.0%), respectively, but systematic errors were not found in average‐for‐gestational age fetuses. No differences in random errors were seen in these three growth categories. Comparison with other weight estimation procedures indicated that the Rossavik procedure gives weight estimates that are at least as accurate as those obtained with other methods over a wide range of weight and growth categories. However, the Rossavik procedure can be used to generate individual growth curve standards for weight estimates, a characteristic not shared with other weight est

ISSN:0091-2751    

DOI:10.1002/jcu.1870160402

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1988

数据来源: WILEY

摘要:

AbstractVariability of Doppler transmitral flow was studied in 42 normal patients (aged 19–68 years). Starting at the mitral annulus level (ANL) in an apical four‐chamber view, the sample volume was moved downstream at 1‐cm intervals. At all positions, peak early (E) and late atrial mediated (A) diastolic velocity were measured, and the distance from the transducer to the level with the highest E wave (HEL) and highest A wave (HAL) determined. The A/E ratio and time velocity integral (TVI) at ANL, HAL, and HEL were also calculated.Peak E velocity at HEL was 33% higher than at ANL (p<0.01) and peak A velocity was 15% higher at HAL than at ANL (p<0.01). The A/E ratio was minimal at HEL and maximal at ANL (0.68 ± 0.28 vs 0.85 ± 0.32,p<0.01), whereas TVI was highest at HEL and lowest at ANL.Thus, inflow parameters vary along the inflow axis. This is of importance for cardiac output measurement. The A/E ratio was more dependent on age than on sample volume p

ISSN:0091-2751    

DOI:10.1002/jcu.1870160403

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1988

数据来源: WILEY

摘要:

AbstractThis study presents new evidence as to the usefulness of ultrasound scanning in field conditions, to screen out hydatidosis in endemic areas, and to compare its detection capability with serological methods. It also intends to demonstrate that for an efficient rural ultrasound screening, neither an experienced ultra sonographer nor expensive and sophisticated equipment is necessary. it can be done by suitably trained personel (eg, nurse, public health worker), using basic equipment, without public health instalations or electricity, thus making it a feasible, simple, fast, and cheap screening method for hydatidosis.

ISSN:0091-2751    

DOI:10.1002/jcu.1870160404

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1988

数据来源: WILEY

摘要:

AbstractBased on routine fetometry screening at 32 weeks of gestation, 80 out of 3226 singleton pregnancies were suspected of intrauterine growth retardation (IUGR) and 72 of them were subjected to repeated fetal blood flow measurements by Doppler ultrasound for evaluation of the fetal condition. The maximum blood velocity wave form recorded from the fetal descending aorta and umbilical artery was classified as normal or abnormal depending on the presence or absence of positive end‐diastolic blood flow. Compared to the pregnancies with normal fetal blood flow, the group of 30 pregnancies with abnormal blood flow patterns had significantly more pregnancy complications and more operative deliveries for fetal distress. In the latter group, all newborns but one were small‐for‐gestational age and had low 1‐min Apgar scores more frequently. Fetal blood flow measurements have a good capacity for predicting unfavorable fetal outcomes and can be recommended for clinical use. The combination of ultrasound screening and Doppler blood flow measurement has reduced the number of pregnancies requiring intensive surve

ISSN:0091-2751    

DOI:10.1002/jcu.1870160405

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1988

数据来源: WILEY

摘要:

AbstractThe accuracy of ultrasonography in detecting the right hepatic artery was prospectively assessed in 128 patients undergoing abdominal angiography. Twenty‐five (19%) of the ultrasound studies were technically inadequate mainly because of gas superimposition. Of the remaining 103 cases, 14 had a replaced hepatic artery, which was diagnosed in 10 cases with ultrasound (sensitivity 71%). Eighty‐nine did not have a replaced hepatic artery and the ultrasound assessment was falsely positive in four of them (specificity 96%). Two of the four false negative results could be explained by a stenosis of the superior mesenteric artery in front of the origin of the replaced hepatic artery. Two of the four false positive results could be explained by the presence of a stenosis of the celiac trunk with hypertrophy of the pancreaticoduodenal arteries, one of them being misdiagnosed as a replaced hepatic art

ISSN:0091-2751    

DOI:10.1002/jcu.1870160406

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1988

数据来源: WILEY

摘要:

AbstractThe ultrasonic findings in 14 cases with submucosal tumors and one case with extragastric lymphoma using the fluid‐filled stomach method were reviewed to determine the appearance of the stomach wall in submucosal tumors. Two characteristic ultrasound features of submucosal tumors were demonstrated in all 14 lesions except in two located high in the fundus of the stomach. One feature was mucosal bridging layers, i.e., three layers could be seen on the mucosal side of the tumors, and at least two of them continued to layers 1 and 2 of the normal gastric wall. The other was a serosal bridging layer, i.e., layer 5 of the normal gastric wall ran toward the serosal side of the tumor. On the basis of a “bridging layers” sign, we believe a definite diagnosis of submucosal tumor can be obtained from ultrasound i

ISSN:0091-2751    

DOI:10.1002/jcu.1870160407

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1988

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870160408

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1988

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870160409

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1988

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870160410

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1988

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870160411

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1988

数据来源: WILEY