Predictive value of colour Doppler ultrasonography in detecting failure of vascular access grafts

1995 ◽  
Vol 82 (1) ◽  
pp. 50-52 ◽  
Author(s):  
C. Köksoy ◽  
A. Kuzu ◽  
??. Erden ◽  
A. G. Türkçapar ◽  
??. Düzgün ◽  
...  
Keyword(s):  
Vascular Access ◽  
Predictive Value ◽  
Doppler Ultrasonography ◽  
Colour Doppler ◽  
Colour Doppler Ultrasonography

168 Comparison of different Doppler ultrasound settings for pregnancy diagnosis based on corpus luteum perfusion at 21 days after AI in beef cattle

2020 ◽  
Vol 32 (2) ◽  
pp. 211
Author(s):  
S. R. Wellert ◽  
S. E. Battista ◽  
J. Kieffer ◽  
R. N. Lurch ◽  
A. Garcia-Guerra
Keyword(s):  
Predictive Value ◽  
Diagnostic Performance ◽  
Doppler Ultrasonography ◽  
Fixed Time ◽  
Colour Doppler ◽  
Flow Mapping ◽  
Pregnancy Diagnosis ◽  
Colour Doppler Ultrasonography ◽  
Colour Flow ◽  
Colour Flow Mapping

Colour Doppler ultrasonography of the corpus luteum (CL) can be used for early pregnancy diagnosis to improve reproductive efficiency and increase the use of AI in beef cattle. The objective of the present study was to determine the diagnostic performance of different Doppler ultrasonography settings for pregnancy diagnosis based on CL perfusion at 21 days after fixed-time AI in beef heifers and cows. Yearling Angus-cross heifers (n=25) and suckled Angus-cross cows (n=84) aged 2-13 years were submitted to a 5-day CO-Synch + controlled internal drug release (CIDR) and timed AI at 60 or 72h after CIDR removal for heifers and cows, respectively. Animals were evaluated by a single operator using colour Doppler ultrasonography (Esaote MyLab Delta) at Day 21. Three settings for colour flow mapping (720, 960, and 1500Hz) and one setting for power Doppler (960Hz), which differed in pulse repetition frequency, were evaluated. The other settings remained unchanged with a probe frequency of 6.3MHz, wall filter of 3, and gain of 61. The pregnancy status (pregnant or non-pregnant) of cows and heifers was determined at 21 days following insemination using colour Doppler ultrasonography. Cows and heifers were considered to be pregnant if the CL blood flow area covered >10% of the periphery of the CL and contained at least two colour internal tracts penetrating towards the centre of the CL. Cattle were evaluated using transrectal B-mode ultrasonography on Day 35 to determine actual pregnancy status. Differences between diagnostic performance variables were evaluated using logistic regression, and setting, category (heifer or cow), and the interaction were included as fixed effects. Pregnancies per AI at Day 35 after fixed-time AI were 47.7% (52/109). Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) for pregnancy diagnosis at Day 21 for each setting are included in Table 1. There were no differences in sensitivity and NPV between settings (P>0.9), category (P>0.9), or the interaction (P>0.9). There was no effect of setting (P>0.5) or category×setting interaction (P>0.8) on specificity and PPV. There was, however, an effect of category (P<0.01). Colour Doppler ultrasonography had less specificity (59.1% compared with 90.2%) and PPV (75% compared with 89.3%) in heifers than in cows. In conclusion, colour Doppler ultrasonography settings that were evaluated did not affect the diagnostic performance for pregnancy diagnosis at Day 21 after AI, although, numerically the colour flow mapping at 960Hz appears to maximise diagnostic accuracy. In addition, the false-positive rate was greater in heifers, which warrants further research. Table 1.Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) for pregnancy diagnosis for four colour Doppler ultrasound settings (colour flow mapping (CFM) at 720, 960, and 1500Hz and power Doppler (PWD) at 960Hz) at 21 days after fixed-time AI Item CFM720 CFM960 CFM1500 PWD960 Sensitivity,% 100 100 92.3 100 Specificity,% 80.7 87.7 87.7 80.7 PPV,% 82.5 88.1 87.3 82.5 NPV,% 100 100 92.6 100

scholarly journals Diagnostic accuracy of Color Doppler of cerebral and umbilical pulsatality in diagnosing IUGR, taking birth weight as gold standard.

2020 ◽  
Vol 27 (03) ◽  
pp. 651-659
Author(s):  
Syed Anjum Mehdi ◽  
Hassan Bukhari ◽  
Iqbal Hussain Dogar ◽  
Irfan Shabbir
Keyword(s):  
Birth Weight ◽  
Diagnostic Accuracy ◽  
Predictive Value ◽  
Gold Standard ◽  
Doppler Ultrasonography ◽  
Color Doppler ◽  
False Negative ◽  
Colour Doppler ◽  
True Negative ◽  
Colour Doppler Ultrasonography

Objectives: To determine the diagnostic accuracy of colour Doppler of cerebral and umbilical pulsatality in diagnosing IUGR, taking birth weight as gold standard. Study Design: Descriptive, Cross Sectional Study. Setting: Department of Radiology, DHQ Hospital, Faisalabad. Period: 30th May 2016 to 29th November 2016. Material & Methods: Total 129 clinically suspected IUGR, 18 to 40 years of age with singleton pregnancy were included. Patients having Hb< 8.5 g/dl, chromosomal abnormality, chronic infections, severe systemic illness like uncontrolled diabetes mellitus, cardiac disease, renal or hepatic disease were excluded. Colour Doppler Ultrasonography of the cerebral and umbilical artery was performed in every patient and looked for IUGR. Colour Doppler sonography findings were compared with birth weight of baby. Results: Mean age was 30.26 ± 4.67 years. The mean gestational age was 38.60 ± 1.27 weeks. Mean parity was 2.68 ± 0.74. In Colour Doppler Ultrasonography positive patients, 64 were true positive while 09 were false positive. Among, 56 Colour Doppler Ultrasonography negative patients, 07 were false negative while 49 were true negative. Overall sensitivity, specificity, positive predictive value, negative predictive value and diagnostic accuracy of colour Doppler of cerebral and umbilical pulsatality in diagnosing IUGR, taking birth weight as gold standard was 90.14%, 84.49%, 87.67%, 87.50% and 87.60% respectively. Conclusion: This study concluded that diagnostic accuracy of colour Doppler of cerebral and umbilical pulsatality in diagnosing IUGR is quite high.

scholarly journals Caliber-Persistent Labial Artery: A Report of a Rarely Recognized Lip Swelling

2018 ◽  
Vol 8 ◽  
pp. 41
Author(s):  
Malarkodi Thanthoni ◽  
P Rajeev ◽  
S Sathasivasubramanian
Keyword(s):  
Doppler Ultrasonography ◽  
Clinical Importance ◽  
Surgical Excision ◽  
Excisional Biopsy ◽  
Vascular Lesion ◽  
Colour Doppler ◽  
Non Invasive ◽  
Colour Doppler Ultrasonography ◽  
Soft Tissue Swelling ◽  
Arterial Branch

Calibre-persistent labial artery (CPLA) is a commonly underdiagnosed vascular lesion of the lip. CPLA is an arterial branch that penetrates the submucosal tissue without loss of calibre. Clinical diagnosis is significant as misdiagnosis can lead to profuse haemorrhage following an excisional biopsy or surgical excision. Colour Doppler ultrasonography is a safe and non-invasive diagnostic tool to confirm the diagnosis. Here, we report a case of a 24-year-old man who complained of an asymptomatic pulsating non-progressive nodule on the left side of upper lip initially diagnosed as peripheral angiomatous lesion. Diagnosis was confirmed by high-resolution Colour Doppler Ultrasonography. The purpose of this case report is to highlight the clinical importance and diagnosis of a rarely reported soft tissue swelling of the lip to the attention of clinicians.

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