This article is a critical review of some of the methods that have been used for the sampling, analysis, and monitoring of vapor-phase toluene diisocyanate (TDI). Only some of the methods that have received relatively widespread application have been addressed in this article. This review includes a "tutorial style" discussion of basic definitions and basic principles and procedures of quality ...

Assessment of exposure to airborne endotoxins has been studied for several years, especially in occupational environments, but a large number of procedures are used for sampling and analysis. This lack of standardization makes it very difficult to compare results and set internationally accepted threshold limit values (TLVs) or occupational exposure limits (OELs) for endotoxin exposure. This pa...

background echocardiography is widely used to diagnose or exclude cardiac disease. the reports on reference values based on an asian population are limited. objectives we conducted a study to determine normal values for two-dimensional, m-mode, and doppler echocardiographic measurements and evaluate the relationship between these parameters and age and gender in a large, healthy iranian populat...

Normal faeces contain both coproporphyrin and protoporphyrin in very small quantities. These arise in part as by-products from haem synthesis which are excreted via the bile into the gut, in part from degradation of ingested haem, and possibly also in part by bacterial synthesis in the intestine. In adults normal values (Barnes, 1957) are: coproporphyrin, 0-15 ug. per g. dry weight; and protopo...

PURPOSE Age-corrected values are indispensable in assessing discrete changes in light difference sensitivity (LDS) when evaluating perimetric results. In order to detect incipient visual field defects, the present study aimed particularly to determine function of normal values depending on age and eccentricity. METHODS A test group (n = 83) of ophthalmologically and clinically unremarkable su...

OBJECTIVES To determine normal oxygen saturation (OSAT) values in infants and children measured by pulse oximetry METHODS Infants and children admitted to a children's hospital for elective surgery from 11/20/2000 to 3/30/2002 underwent surgical clearance screens consisting of illness symptoms, vital signs and OSAT in room air Based on the presence of respiratory infection (RI) symptoms, a "n...

Left ventricular (LV) volume determinations by the area-length method were reevaluated in postmortem studies of left ventricles ranging from 0.5 to 90 cm3 absolute volume. The regression equation relating known and calculated volumes for calculated volumes <15 cm3 (V' 0.733V) was found to be significantly different from that for calculated volumes >15 cm3 (V'= 0.974V -3.1). From these equations...

Copyright © 2013, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran; Licensee Safnek Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is...

We assessed the frequency and clinical background of normal concentrations of serum total thyroxin (T4) found among 84 hyperthyroid patients out of 633 consecutive patients evaluated for suspected hyperthyroidism. Patients were categorized as having hyperthyroidism if they had hyperthyroid symptoms and signs, had a serum thyrotropin (TSH) 0.1 milli-int. unitJL as measured by immuneradiometric a...