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Specimen Acquisition

Additionally, Zivanovic and Davis have evaluated a robotic system for blood sampling that presses a flat-headed probe against the surface of the skin and uses force and/or position profiles to determine the location of a vein. When a needle is inserted, the characteristic force and/or position profile, on puncturing the vein wall, is distinctive enough to [Pg.268]


If a specimen is only partially submerged, the attenuation value of the submerged portion will be marginally variable relative to the exposed portion. Likewise, the differing grayscale values from the fluid/air interface will present within the specimen acquisition when viewed. [Pg.230]

The control of preanalytical conditions or variables, such as test requests, patient preparation, patient identification, specimen acquisition, specimen transport, specimen processing, specimen distribution, preparation of work lists and logs, and maintenance of records (see Chapters 1 and 17). ... [Pg.491]

Laboratory tests are affected by many factors, such as recent intake of food, alcohol, or drugs, and by smoking, exercise, stress, sleep, posture during specimen collection, and other variables (see Chapter 17). Proper patient preparation is essential for the test results to be meaningful. Although responsibility for this usually resides with personnel outside the laboratory, the laboratory must define the instructions and procedures for patient preparation and specimen acquisition. These procedures should be included in hospital procedure manuals and should be transmitted to patients in both oral and written instructions. Compliance with these instructions is monitored directly when the laboratory employs its own phlebotomists. Specific inquiry should be made regarding patient preparation before specimens are collected, and efforts should be made to correct noncompli-ance. For tests in which standardization of the collection is very important (such as for plasma catecholamines), specimens should be collected in a controlled environment, such as a clinical testing unit. [Pg.493]

Specimen acquisition and management Specimen collection, fixation, processing, sectioning Pathologist/technologist... [Pg.14]

In general, direct methods can be used to acquire impedance data significantly more rapidly than bridge methods. This is particularly true for digitally demodulated, phase-sensitive detectors, for which only a single cycle is required. Nevertheless, in unstable systems, such as rapidly corroding specimens, acquisition rate is an important consideration, and a major criticism of PSD methods is that these must be performed frequency by frequency. Fortunately, this often is not a serious hindrance when such equipment is automated. In the past decade, a number of experimenters have used automated frequency response analyzers as digitally demodulated, stepped-frequency impedance meters. Typical of this class are the Solartron 1170 and 1250 series frequency response analyzers (FRAs). [Pg.144]

Setup an Automated Test Series. Before testing can begin the user must identify the specimen bars in the magazine and specify the test conditions. This is accomplished with setup routines which prompt the user to define the test series. At various points the user is given the opportunity to go back and correct erroneous entries. The information provided by the user is stored in a queue file to be accessed later by the data acquisition software. [Pg.49]

For a detailed discussion of the art of sample handling and data acquisition for blood gas measurements, see National Committee for Clinical Laboratory Standards. Blood gas pre-analytical considerations specimen collection, calibration, and controls Proposed Guideline. NCCLS publication C27-P, Villanova, Pennsylvania, NCCLS, 1985... [Pg.72]

Fig. 3.4.8 One-dimensional SPI drying profiles drying are indicated by the symbols ( ) and of concrete moist-cured for 28 days and of a (O), respectively. The measurement para-0.6 water-cement ratio [9]. The specimen was meters were field of view (FOV) 150 mm, sealed except for one face and exposed to a acquisition points 64, tp = (55 - 300 ps, 8 val-drying regime at 38 °C and 40% relative humi- ues), a = 6°, TR = 100 ms, acquisition time dity for 28 days. The spatial moisture content 3.5 min per encoding time, after 28 days of moist curing and 28 days of... Fig. 3.4.8 One-dimensional SPI drying profiles drying are indicated by the symbols ( ) and of concrete moist-cured for 28 days and of a (O), respectively. The measurement para-0.6 water-cement ratio [9]. The specimen was meters were field of view (FOV) 150 mm, sealed except for one face and exposed to a acquisition points 64, tp = (55 - 300 ps, 8 val-drying regime at 38 °C and 40% relative humi- ues), a = 6°, TR = 100 ms, acquisition time dity for 28 days. The spatial moisture content 3.5 min per encoding time, after 28 days of moist curing and 28 days of...
Fig. 3.4.12 Three-dimensional rendered spin-echo image of water filled cracks in a cement paste specimen [13]. Three cracks are visible in the image a large triangular crack in the forefront, a smaller crack in the bottom left corner and a sheet-like structure at the top of the image. Water droplets can also be observed condensing on the cement paste surfaces. The measurement parameters were FOV 20 x 20 x 20 mm, acquisition points 128 x 128 x 64, nominal resolution 156 x 156 x 312 pm, echo time 2.7 ms, repetition time 500 ms and acquisition time 270 min. Fig. 3.4.12 Three-dimensional rendered spin-echo image of water filled cracks in a cement paste specimen [13]. Three cracks are visible in the image a large triangular crack in the forefront, a smaller crack in the bottom left corner and a sheet-like structure at the top of the image. Water droplets can also be observed condensing on the cement paste surfaces. The measurement parameters were FOV 20 x 20 x 20 mm, acquisition points 128 x 128 x 64, nominal resolution 156 x 156 x 312 pm, echo time 2.7 ms, repetition time 500 ms and acquisition time 270 min.

See other pages where Specimen Acquisition is mentioned: [Pg.267]    [Pg.268]    [Pg.493]    [Pg.1008]    [Pg.18]    [Pg.86]    [Pg.267]    [Pg.268]    [Pg.493]    [Pg.1008]    [Pg.18]    [Pg.86]    [Pg.569]    [Pg.147]    [Pg.168]    [Pg.224]    [Pg.69]    [Pg.210]    [Pg.30]    [Pg.39]    [Pg.49]    [Pg.50]    [Pg.150]    [Pg.326]    [Pg.228]    [Pg.296]    [Pg.130]    [Pg.533]    [Pg.536]    [Pg.102]    [Pg.312]    [Pg.165]    [Pg.166]    [Pg.167]    [Pg.487]    [Pg.951]    [Pg.385]   


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Specimen automated acquisition

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