34005
document
Comparison with computed tomography of two ultrasound devices for diagnosis of abdominal aortic aneurysm . Screening for abdominal aortic aneurysms ( AAAs ) in patients at risk will become more cost effective if a simple , inexpensive , and reliable ultrasound device is available . The aim of this study was to compare a 2-dimensional , handheld ultrasound device and a newly developed ultrasound volume scanner ( based on bladder scan technology ) with computed tomography ( CT ) for diagnosing AAA . A total of 146 patients ( mean age 69 +/- 10 years ; 127 men ) were screened for the presence of AAAs ( diameter > 3 cm ) using CT. All patients were examined with the handheld ultrasound device and the volume scanner . Maximal diameters and volumes were used for the analyses . AAAs were diagnosed by CT in 116 patients ( 80 % ) . The absolute difference of aortic diameter between ultrasound and CT was < 5 mm in 88 % of patients . Limits of agreement between ultrasound and CT ( -6.6 to 9.4 mm ) exceeded the limits of clinical acceptability ( +/-5 mm ) . An excellent correlation between ultrasound and CT was observed ( r = 0.98 ) . The correlation coefficient between the volume scanner and CT was 0.86 , with agreement of 90 % and kappa value of 0.73 . Using an optimal cut-off value of > 56 ml , defined by receiver-operating characteristic curve analysis , sensitivity , specificity , and the positive and negative predictive values of the volume scanner for detecting AAA were 90 % , 90 % , 97 % , and 71 % , respectively . In conclusion , this study shows that a 2-dimensional , handheld ultrasound device and a newly developed ultrasound volume scanner can effectively identify patients with AAAs confirmed by CT .
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Intervention_Physical
computed tomography
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Intervention_Physical
handheld ultrasound device
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Intervention_Physical
ultrasound volume scanner
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Intervention_Physical
computed tomography ( CT )
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Intervention_Physical
CT
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Intervention_Physical
ultrasound
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Intervention_Physical
CT
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Intervention_Physical
CT
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Intervention_Physical
ultrasound
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Intervention_Physical
CT
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Intervention_Physical
CT
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Outcome_Physical
Maximal diameters and volumes
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Outcome_Physical
absolute difference of aortic diameter
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Participant_Condition
abdominal aortic aneurysm .