To send content items to your account,
please confirm that you agree to abide by our usage policies.
If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account.
Find out more about sending content to .
To send content items to your Kindle, first ensure firstname.lastname@example.org
is added to your Approved Personal Document E-mail List under your Personal Document Settings
on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part
of your Kindle email address below.
Find out more about sending to your Kindle.
Note you can select to send to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi.
‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
A cross-sectional survey of 210 healthcare workers at a pediatric teaching hospital was performed to assess knowledge of published guidelines for proper measurement and documentation of tuberculin skin test Results. We conclude that many healthcare workers have inadequate knowledge for optimal measurement and documentation of tuberculin skin test results.
To determine whether ultrasound-guided core needle biopsy is a safe and reliable investigation in cases of parotid swelling in which fine needle aspiration cytology has failed to give a definitive diagnosis.
Analysis of 66 ultrasound-guided core biopsy specimens of the parotid gland (the largest series reported thus far) sample number refers to histological samples throughout the paper.
All the 184 cases of parotid surgery with a histological diagnosis were included.
Main outcome measures:
The sensitivity, positive predictive value and diagnostic accuracy of fine needle aspiration cytology and ultrasound-guided core needle biopsy, as compared with the final histological analysis.
Of a total of 184 patients, 89.1 per cent (164/184) had benign parotid lesions excised. The sensitivity, positive predictive value and diagnostic accuracy of fine needle aspiration cytology for benign lesions were 76.2, 84.2 and 87.5 per cent, respectively, and those of ultrasound-guided core needle biopsy were 91.7, 98.2 and 96.4 per cent, respectively. Twenty of 184 patients (10.9 per cent) had malignant lesions. The sensitivity, positive predictive value and diagnostic accuracy of fine needle aspiration cytology for detection of malignant lesions were 60, 75 and 75 per cent, respectively, while those of ultrasound-guided core biopsy were 89, 100 and 100 per cent, respectively. Non-diagnostic rates were 25.8 per cent for fine needle aspiration cytology and 4.5 per cent for ultrasound-guided core biopsy. Only one case of complications (a sub-clinical haematoma) occurred in the ultrasound-guided core biopsy group.
We propose ultrasound-guided core needle biopsy as a very safe and effective tool in cases of parotid swelling in which fine needle aspiration cytology has failed to give a definitive diagnosis.
We present the first resonant x-ray reflectivity measurements from a liquid surface. The surface structure of the liquid Hg-Au alloy system just beyond the solubility limit of 0.14at% Au in Hg had previously been shown to exhibit a unique surface phase characterized by a low-density surface region with a complicated temperature dependence. In this paper we present reflectivity measurements near the Au LIII edge, for 0.2at% Au in Hg at room temperature. The data are consistent with a concentration of Au in the surface region that can be no larger than about 30at%. These results rule out previous suggestions that pure Au layers segregate at the alloy surface.
Email your librarian or administrator to recommend adding this to your organisation's collection.