By W. G. Guder, S. Narayanan, H. Wisser, B. Zawta
This 3d up to date variation comprises the most recent advancements in analytical ideas. a world workforce of authors summarizes the data on organic impacts, analytical interferences and at the variables affecting the gathering, delivery and garage in addition to practise of samples. They hide age, gender, race, being pregnant, nutrition, workout and altitude, plus the consequences of stimulants and medicine. nationwide and foreign criteria are defined for sampling approaches, delivery, pattern identity and all protection facets, whereas caliber coverage methods are proven for overall laboratory administration.
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Extra resources for Samples: From the Patient to the Laboratory: The Impact of Preanalytical Variables on the Quality of Laboratory Results
Normally, transfer times are short when the laboratory is located close to or in clinics and represent no problem. The time from drawing the blood sample to centrifugation, however, should not exceed one hour. Some analytical procedures require special additives such as sodium fluoride/ oxalate for quantification of lactate (9) or sodiumborate/serine EDTA for quantification of ammonia (56). Determination of free haemoglobin in plasma requires gentle handling of the EDTA blood sample. Transfer to the laboratory may proceed either by courier or a pneumatic tube delivery system.
Name, prename and date of birth is the most frequently used combination of information for identification. In order to reduce the amount of information involved, a patient number is allocated in many hospitals. This number cannot be used for any other individual. Ideally, this number is printed together with the name on any request, sample and report. Ward, room and bed numbers may be of additional help. This is especially useful if sampling is not done by the same person as the one ordering laboratory tests.
11- 1 ). The sampling time should be as long as possible, using a needle as fine as possible, to avoid headache following puncture. Which specific aspects of CSF sampling are important? The fasting patient should be seated or asked to lie on his/her side on a flat support. The patient‘s back should be bent forwards and the position secured by an assistant. The musculature should be as relaxed as possible (Fig. 11-1). g. in bacterial meningitis). ventricular, suboccipital or via a shunt and should be noted.
Samples: From the Patient to the Laboratory: The Impact of Preanalytical Variables on the Quality of Laboratory Results by W. G. Guder, S. Narayanan, H. Wisser, B. Zawta