Air as an ultrasound contrast marker for accurate determination of needle placement. Tumor biopsy localization and other applications.

Lee, T G; Knochel, John Q.

doi:10.1148/radiology.143.3.7079511

Cited by 18 publications

(8 citation statements)

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“…via the liver fissures and peripancreatic vessels (Fig. I) of pancreatic masses a correlation between tumour size and sampling errors has been found (II, 17). However, in the present investigation no such correlation was found, which is in agreement with other ultrasound guided studies (28).…”

Section: Discussionsupporting

confidence: 92%

“…The present results, with a frequency of false negative samples of 10 per cent, and an accuracy and sensitivity around 90 per cent, correspond well with the figures obtained in other investigations concerning sonographically guided FNB (Table 3) (3,4,9,12,16,17,21,25,28,31,33,36,37). The prevalence of malignant disease in this material was high.…”

Section: Discussionsupporting

confidence: 91%

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Reliability of Ultrasound-Guided Fine-Needle Biopsy of Pancreatic Masses

Ekberg¹,

Bergenfeldt²,

Aspelin³

et al. 1988

Acta Radiol

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Fine-needle aspiration biopsy (FNB) was performed with ultrasound guidance in 79 patients in whom sonography had revealed a mass suggesting pancreatic malignancy. The final diagnosis (surgery, autopsy and clinical course) in 69 of these 79 patients was a malignancy closely related to the pancreas while in the remaining 10 patients benign disease was confirmed. A correct diagnosis of malignancy was attained by FNB in 59 of the 69 patients with a malignant tumour while in 10 it failed to confirm the diagnosis. FNB yielded a true negative result in 10 patients with benign disease. The accuracy of sonographically guided FNB in the present investigation was 87 per cent. Ultrasoundguided fine-needle biopsy is considered the method of choice for further evaluation of pancreatic masses.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 91%

Reliability of Ultrasound-Guided Fine-Needle Biopsy of Pancreatic Masses

Ekberg¹,

Bergenfeldt²,

Aspelin³

et al. 1988

Acta Radiol

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“…16 Air/Water Priming Previous investigations have reported that injection of small amounts of air (0.3-0.5 mL) into tissue through a biopsy needle can be used to identify the location of the needle tip. 23 In the present study, priming the needle with water showed a trend for increased needle shaft and tip brightness. Tiny amounts of air trapped between the inner surface of the needle and the water may enhance the reflection of the ultrasound beam.…”

Section: Insulationsupporting

confidence: 53%

Ultrasound visibility of needles used for regional nerve block: An in vitro study

Schafhalter-Zoppoth

McCulloch

Gray

2004

Regional Anesthesia and Pain Medicine

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The results of our in-vitro study suggest a number of factors enhancing ultrasound visibility of regional block needles. The use of needles in the largest possible size inserted with a medium-size guide wire provides the best ultrasound visibility. Analysis of the approach angle favors needle insertion parallel to the transducer. The consideration of these factors may improve safety and success of ultrasound-guided regional blocks.

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“…1 Subsequently, various methods and instruments were devised to improve the ability to see biopsy needles and catheters using ultrasound, [2][3][4] relying primarily on a combination of skilled technique and mechanically establishing a fixed angle between the ultrasound beam and the needle trajectory. Improvements in the design and performance of ultrasound machines and needle-biopsy guides, [5][6][7][8] various augmentation techniques, [9][10][11][12][13][14][15][16][17][18][19] and new computer algorithms and material technology [20][21][22][23][24][25][26][27] have led to even more enhanced visualisation methods. Despite these advances, problems with needle visualisation remain.…”

Section: Introductionmentioning

confidence: 99%