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PubMed1975

[Hematologic function tests in early diagnosis].

The functional tests in form of tolerance tests allow an insight into the adaptibility of the organism to changed inner and outer conditions. The majority of haematological functional tests demands a temporary and economic expediture which excludes it a priori as screening test. According to a previously published phase program for the haematological functional diagnosis a report is given on simple methods for judging the disturbed partial functions of the blood.

Adaptation, Biological↗
PubMed1987

Thrombelastography of blood from subjects with chronic renal failure.

Blood samples from 23 subjects with chronic renal failure and 19 controls were tested using thrombelastography and other hematologic tests. The uremic subjects were divided into two groups, those who had not yet begun maintenance hemodialysis treatments (12 subjects) and those who had (11 subjects). Compared to those from control subjects, the thrombelastograms from the uremic subjects consistently indicate normal clotting times but significantly elevated amplitudes. The increased amplitudes correlate positively in the dialyzed uremic group with both platelet count and fibrinogen concentration and correlate negatively in both uremic groups with hematocrit. Thrombelastography demonstrates a hypercoagulability in these samples in vitro, despite the prolonged bleeding time that commonly occurs in uremic subjects.

Fibrinogen↗
PubMed1994

Laboratory tests in rheumatology.

The most commonly used laboratory tests in the diagnosis and monitoring of rheumatic diseases are reviewed. Particular emphasis is placed on antinuclear antibodies as markers of specific rheumatic disorders and disease subsets. The use of synovial fluid tests to differentiate between inflammatory and noninflammatory rheumatic disorders is described as well as the use of common hematological tests.

Antibodies, Antinuclear↗
PubMed2005

An administrative intervention to improve the utilization of laboratory tests within a university hospital.

BACKGROUND: Improving the appropriateness of testing behavior and reducing the number of laboratory tests have been recognized as essential parts of quality improvement. OBJECTIVE: To assess the effectiveness of an administrative and a short-term educational intervention aimed at reducing clinical biochemistry laboratory utilization. DESIGN: An analysis comparing utilization of laboratory tests performed on in-patients before and after the intervention. SETTING: Computerized database of all laboratory tests performed in Hadassah Ein Kerem Medical Center, Jerusalem, Israel during 1999-2003. INTERVENTION: The administrative intervention included restricting available emergency laboratory tests and frequency of repeated orders. The educational measures included: discussion of the misuse of laboratory tests and its consequences with the hospital medical staff, and presentation of the new restrictive policy. A feedback of the intervention's results was sent to the wards and reviewed with senior medical staff. MAIN OUTCOME MEASURES: Change in utilization (measured as rates per 100 hospital days) of clinical biochemistry tests by hospital division and by selected laboratory tests. RESULTS: An overall reduction of 19% in laboratory tests (95% CI: 18.8-19.2%) was observed in the year after the intervention. Utilization decreased significantly in all the hospital's medical divisions, within a range of 14.9-43.8%. During the intervention period, utilization of hematology tests was reduced by 7.6% (P = 0.009). Statistically significant reductions were noted in the ordering of all 12 selected clinical biochemistry tests. Although the orders of total cholesterol decreased by 72.2%, the utilization of 'high-volume' tests, such as glucose and electrolytes, showed only a modest decrease (7.9% and 6.9%, respectively). CONCLUSIONS: The present study included all hospital medical staff and covered all the available clinical biochemistry tests. This rather simple and low-cost intervention resulted in significant reductions in clinical biochemistry test orders as well as in the ordering of hematological blood tests.

Adult↗
PubMed1992

Effect of bleeding site on clinical laboratory testing of rats: orbital venous plexus versus posterior vena cava.

We sought to determine if there were any differences in the results of clinical laboratory tests between blood samples collected from the orbital venous plexus and the posterior vena cava of adult male rats. Thirty healthy adult male Sprague Dawley rats were anesthetized by ether inhalation, and blood samples were collected successively from the orbital venous plexus (OVP) and the posterior vena cava (PVC) for hematologic (n = 10), serum chemistry (n = 10), and coagulation (n = 10) analyses. The prothrombin and partial thromboplastin times of samples from the OVP were prolonged (17% and 288%, respectively) when compared with samples from the PVC. Respective hematologic biases were as follows: red blood cell count (7%), hemoglobin (6%), hematocrit (5%), mean corpuscular volume (-3%), mean corpuscular hemoglobin (-1%), mean corpuscular hemoglobin content (1%), white blood cell count (13%), and platelet count (-7%). Respective serum chemistry biases were as follows: sorbitol dehydrogenase (-7%), glucose (-7%), blood urea nitrogen (-10%), creatinine (-2%), total protein (4%), albumin (2%), globulin (9%), alkaline phosphatase (5%), lactate dehydrogenase (-6%), aspartate aminotransferase (-5%), alanine aminotransferase (-2%), total bilirubin (0%), direct bilirubin (0%), magnesium (-17%), sodium (4%), potassium (0), chloride (4%), calcium (-2%), phosphorous (-17%), cholesterol (3%), triglycerides (24%), creatinine kinase (-8%), 5'nucleotidase (0%), and total bile acids (4%). For hematologic testing, there were no biologically significant differences between samples collected from the OVP and PVC. The coagulation times and serum Mg and P showed biologically significant differences between samples collected from the OVP and PVC.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗
PubMed1996

Clinical hematology. In-clinic analysis, quality control, reference values, and system selection.

An increasing number of veterinary practices are performing in-office hematology testing. Historically, this involved time-consuming, labor-intensive manual methods. A number of automated and semiautomated hematology instruments are now available for analysis of veterinary samples, which, when used properly, offer more efficient, precise testing than can be achieved through manual methods. This article reviews manual methods for performing a complete blood count and describes some of the available automated hematology instruments. Factors that affect test results and the importance of a quality assurance program are also discussed.

Animals↗