Improved reliability of ultrasonic surveillance of abdominal aortic aneurysms
(1997) In European Journal of Vascular and Endovascular Surgery 13(2). p.149-153- Abstract
- OBJECTIVES: Small abdominal aortic aneurysms (AAA) are usually managed conservatively by serial ultrasound examinations to assess size. The development of the size of the AAA will determine whether the patient is a candidate for surgery. The precision of measurement is therefore of considerable importance. The aim of this study was to evaluate the accuracy and the reproducibility of a newly developed echo-tracking ultrasonic system in the size evaluation of AAA. DESIGN: Prospective study at a University Hospital. MATERIAL AND METHODS: An echo-tracking ultrasound system with a 3.5 MHz transducer was used in 54 patients with AAA. Thirty-six patients had repeated measurements by one technician to evaluate the intra-observer variability. In... (More)
- OBJECTIVES: Small abdominal aortic aneurysms (AAA) are usually managed conservatively by serial ultrasound examinations to assess size. The development of the size of the AAA will determine whether the patient is a candidate for surgery. The precision of measurement is therefore of considerable importance. The aim of this study was to evaluate the accuracy and the reproducibility of a newly developed echo-tracking ultrasonic system in the size evaluation of AAA. DESIGN: Prospective study at a University Hospital. MATERIAL AND METHODS: An echo-tracking ultrasound system with a 3.5 MHz transducer was used in 54 patients with AAA. Thirty-six patients had repeated measurements by one technician to evaluate the intra-observer variability. In another 18 patients with aortic dilatation/AAA, the measurements were repeated by a second technician in a blinded fashion with calculation of inter-observer variability. The reproducibility was evaluated both using linear regression and plots according to the method described by Bland and Altman. RESULTS: The mean diameter of the aorta was 37 mm (range 21-51 mm). The coefficient of correlation of repetitive measurements with one observer was r = 0.99 and with two observers r = 0.99. The intra-observer variability was 0.78 mm (S.D.) and the inter-observer variability 0.93 mm (S.D.). The intra- and inter-observer coefficient of variation (CV) was 2-3%. CONCLUSIONS: The newly developed echo-tracking ultrasonography seems at present to be the most accurate and reliable method to follow the diameter of an abdominal aortic aneurysm detecting relevant changes in the diameter exceeding 2 mm (2 S.D.). Thus it fulfils the requirements both for follow-up of conservatively managed AAAs and endovascularly treated aneurysms. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1112024
- author
- Länne, T ; Sandgren, T ; Mangell, Peter LU ; Sonesson, Björn LU and Hansen, F
- organization
- publishing date
- 1997
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Ultrasonography, Echo-tracking, Abdominal aortic aneurysm, Aneurysm surveillance
- in
- European Journal of Vascular and Endovascular Surgery
- volume
- 13
- issue
- 2
- pages
- 149 - 153
- publisher
- Elsevier
- external identifiers
-
- pmid:9091147
- scopus:0030936871
- ISSN
- 1532-2165
- DOI
- 10.1016/S1078-5884(97)80011-1
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Surgery Research Unit (013242220), Emergency medicine/Medicine/Surgery (013240200)
- id
- fc859c3d-e419-4675-8787-1b4cd0ac4d56 (old id 1112024)
- date added to LUP
- 2016-04-01 15:52:23
- date last changed
- 2022-01-28 07:44:08
@article{fc859c3d-e419-4675-8787-1b4cd0ac4d56, abstract = {{OBJECTIVES: Small abdominal aortic aneurysms (AAA) are usually managed conservatively by serial ultrasound examinations to assess size. The development of the size of the AAA will determine whether the patient is a candidate for surgery. The precision of measurement is therefore of considerable importance. The aim of this study was to evaluate the accuracy and the reproducibility of a newly developed echo-tracking ultrasonic system in the size evaluation of AAA. DESIGN: Prospective study at a University Hospital. MATERIAL AND METHODS: An echo-tracking ultrasound system with a 3.5 MHz transducer was used in 54 patients with AAA. Thirty-six patients had repeated measurements by one technician to evaluate the intra-observer variability. In another 18 patients with aortic dilatation/AAA, the measurements were repeated by a second technician in a blinded fashion with calculation of inter-observer variability. The reproducibility was evaluated both using linear regression and plots according to the method described by Bland and Altman. RESULTS: The mean diameter of the aorta was 37 mm (range 21-51 mm). The coefficient of correlation of repetitive measurements with one observer was r = 0.99 and with two observers r = 0.99. The intra-observer variability was 0.78 mm (S.D.) and the inter-observer variability 0.93 mm (S.D.). The intra- and inter-observer coefficient of variation (CV) was 2-3%. CONCLUSIONS: The newly developed echo-tracking ultrasonography seems at present to be the most accurate and reliable method to follow the diameter of an abdominal aortic aneurysm detecting relevant changes in the diameter exceeding 2 mm (2 S.D.). Thus it fulfils the requirements both for follow-up of conservatively managed AAAs and endovascularly treated aneurysms.}}, author = {{Länne, T and Sandgren, T and Mangell, Peter and Sonesson, Björn and Hansen, F}}, issn = {{1532-2165}}, keywords = {{Ultrasonography; Echo-tracking; Abdominal aortic aneurysm; Aneurysm surveillance}}, language = {{eng}}, number = {{2}}, pages = {{149--153}}, publisher = {{Elsevier}}, series = {{European Journal of Vascular and Endovascular Surgery}}, title = {{Improved reliability of ultrasonic surveillance of abdominal aortic aneurysms}}, url = {{http://dx.doi.org/10.1016/S1078-5884(97)80011-1}}, doi = {{10.1016/S1078-5884(97)80011-1}}, volume = {{13}}, year = {{1997}}, }