Abstract:
:The physical properties and chemical composition of urine are highly variable and are determined in large measure by the quantity and the type of food consumed. The specific gravity is the ratio of the density to that of water, and it is dependent on the number and weight of solute particles and on the temperature of the sample. The weight of solute particles is constituted mainly of urea (73%), chloride (5.4%), sodium (5.1%), potassium (2.4%), phosphate (2.0%), uric acid (1.7%), and sulfate (1.3%). Nevertheless, urine osmolality depends only on the number of solute particles. The renal production of maximally concentrated urine and formation of dilute urine may be reduced to two basic elements: (1) generation and maintenance of a renal medullary solute concentration hypertonic to plasma and (2) a mechanism for osmotic equilibration between the inner medulla and the collecting duct fluid. The interaction of the renal medullary countercurrent system, circulating levels of antidiuretic hormone, and thirst regulates water metabolism. Renin, aldosterone, prostaglandins, and kinins also play a role. Clinical estimation of the concentrating and diluting capacity can be performed by relatively simple provocative tests. However, urinary specific gravity after taking no fluids for 12 h overnight should be 1.025 or more, so that the second urine in the morning is a useful sample for screening purposes. Many preservation procedures affect specific gravity measurements. The concentration of solids (or water) in urine can be measured by weighing, hydrometer, refractometry, surface tension, osmolality, a reagent strip, or oscillations of a capillary tube. These measurements are interrelated, not identical. Urinary density measurement is useful to assess the disorders of water balance and to discriminate between prerenal azotemia and acute tubular necrosis. The water balance regulates the serum sodium concentration, therefore disorders are revealed by hypo- and hypernatremia. The disturbances are due to renal and nonrenal diseases, mainly liver, cardiovascular, intestinal, endocrine, and iatrogenic. Fluid management is an important topic of intensive care medicine. Moreover, the usefulness of specific gravity measurement of urine lies in interpreting other findings of urinalysis, both chemical and microscopical.
journal_name
Crit Rev Clin Lab Scijournal_title
Critical reviews in clinical laboratory sciencesauthors
Pradella M,Dorizzi RM,Rigolin Fdoi
10.3109/10408368809105890subject
Has Abstractpub_date
1988-01-01 00:00:00pages
195-242issue
3eissn
1040-8363issn
1549-781Xjournal_volume
26pub_type
杂志文章,评审abstract::The CK-BB isoenzyme is ubiquitous in neoplastic tissue, but with low activity. Accordingly, it might be a nonspecific and insensitive tumor marker. Evaluation of BB isoenzyme in serum might indicate the extent of diseases or the response to therapy. The presence of CK-MB in patients with cancers may cause confusion wi...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408368609165795
更新日期:1986-01-01 00:00:00
abstract::Oncogenes and tumor suppressor genes are genes involved in cell proliferation and differentiation. They play a crucial role in the initiation and progression of cancer. Some of these genes are found to be altered in human cancers, i.e., mutated, amplified, deleted, translocated, or abnormally regulated. Recently, the ...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408369209114603
更新日期:1992-01-01 00:00:00
abstract::This review focuses on the laboratory biochemical tests that are useful in the diagnostic approach to the hypertensive patient. A "minimal" diagnostic laboratory work-up, including a small number of tests that are simple and relatively inexpensive, is first described. Because these tests provide basic information on t...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.1080/10408360500295600
更新日期:2005-01-01 00:00:00
abstract::Infection with hepatitis delta virus (HDV), a satellite virus of hepatitis B virus (HBV), is associated with severe and sometimes fulminant hepatitis. The traditional methods for the diagnosis of HDV infection, such as detection of serum anti-HD antibodies, are sufficient for the clinical diagnosis of delta infection....
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.1080/10408360091174178
更新日期:2000-02-01 00:00:00
abstract::Acute leukemias (ALs) are often associated with chromosomal translocations, in particular, KMT2A/MLL gene rearrangements. Identification or confirmation of these translocations is carried out by a number of genetic and molecular methods, some of which are routinely used in clinical practice, while others are primarily...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章
doi:10.1080/10408363.2020.1844135
更新日期:2020-11-18 00:00:00
abstract::Hypersensitivity pneumonitis (HP) is a group of immunologically mediated lung diseases caused by the inhalation of environmental agents in susceptible individuals. Most HP patients are non-smokers and have been exposed to organic dusts from vegetable or animal products. Some HP cases are associated with exposures to r...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.1080/10408360290795583
更新日期:2002-11-01 00:00:00
abstract::Isoelectric focusing (IEF) as a method for differentiating macromolecules with minor differences in isoelectric points has demonstrated an increase in the degree of genetic polymorphisms of the blood. Studies over the last 5 to 6 years have shown that genetic marker systems such as transferrin (TF), phosphoglucomutase...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408368409165772
更新日期:1984-01-01 00:00:00
abstract::Alpha fetoprotein (AFP) is the major protein of fetal serum and most resembles albumen, which replaces it shortly after birth. It is produced by fetal liver and passes into the amniotic fluid (AF) via fetal urine. A small amount crosses the membranes into the maternal circulation. Excluding fetal blood contamination, ...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408368109105870
更新日期:1981-01-01 00:00:00
abstract::The discovery of vitamin D receptor (VDR) expression in immune cells has opened up a new area of research into immunoregulation by vitamin D, a niche that is distinct from its classical role in skeletal health. Today, about three decades since this discovery, numerous cellular and molecular targets of vitamin D in the...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408363.2015.1094443
更新日期:2016-01-01 00:00:00
abstract::Maximum stability of analytes in chemistry control materials is desired. Stability testing is customarily performed by manufacturers, both prior to distribution of products and during the period following distribution when the products are in the field. Users and evaluators of such materials periodically have reported...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408368209107031
更新日期:1982-01-01 00:00:00
abstract::Our understanding of risk factors for atherogenesis has changed significantly over the last decade. In addition to better grasp of the mechanism of action of the "classic" (causal) risk factors, a number of potentially important new factors has emerged. In this review we briefly summarize the evidence of the relation ...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.1080/20014091084245
更新日期:2001-10-01 00:00:00
abstract::Management of chronic diseases represents a leading health and economic issue worldwide. Biomarkers are critical for the diagnosis and management of both communicable and non-communicable chronic diseases, and mobile health (mHealth) technologies are about to change the "game" with regard to the management of patients...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408363.2016.1167163
更新日期:2016-10-01 00:00:00
abstract::Natural polyphenols are secondary metabolites of plants involved in defense against different types of stress. Extracts containing these compounds have been used for thousands of years in traditional eastern medicine. Polyphenols act on multiple targets in pathways and mechanisms related to carcinogenesis, tumor cell ...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408363.2011.631268
更新日期:2011-09-01 00:00:00
abstract::The coupling of hematologic data with radionuclide studies of the spleen has provided information as to the functioning of the organ in a variety of disease states. The major radionuclide studies have been presented in terms of the type of information derivable and the various conditions that can result in fairly simi...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408368909105717
更新日期:1989-01-01 00:00:00
abstract::Microcytic red blood cell states are common clinical problems in both adult and pediatric age groups. The recent widespread availability of electronic blood cell counters for performing routine blood counts has increased the detection of microcytic red blood cells. Physicians must workup both symptomatic and asymptoma...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408368209107028
更新日期:1982-01-01 00:00:00
abstract::Infants with very low birthweights (less than 1250g) are immunocompromised and have immature hematopoietic systems. They require frequent blood transfusions and have an increased susceptibility to infection. These very low birthweight infants who lack passively acquired antibody against CMV, acquire transfusion-associ...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408368609165792
更新日期:1986-01-01 00:00:00
abstract::Prostate cancer (PCa) is one of the most common age-related cancers among men. Various environmental and genetic factors are involved in the development and progression of PCa. In most cases, the primary symptoms of disease are not severe. Therefore, it is common for patients to be referred with severe clinical manife...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章
doi:10.1080/10408363.2019.1657061
更新日期:2020-01-01 00:00:00
abstract::Allogeneic bone marrow transplantation now has an established place in the treatment of severe aplastic anemia and acute leukemia. Major problems to be overcome in transplantation in patients with aplastic anemia are marrow graft rejection and graft vs. host disease. Results are better in younger patients and in patie...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408368309165762
更新日期:1983-01-01 00:00:00
abstract::Fluoride has the potential to increase skeletal mass to a greater extent than any other pharmacologic agent, yet it has proven difficult to translate this into therapeutic benefit for patients with low bone mass in diseases such as osteoporosis. This apparent paradox can be explained in part by toxic actions of the io...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408369609083059
更新日期:1996-01-01 00:00:00
abstract::Leptin is a 16-kDa cytokine secreted in humans primarily but not exclusively by adipose tissues. Its concentration in blood is usually proportional to body fat mass, but is higher in women than in men not only because of a different distribution of and greater fat mass in women, but also because testosterone reduces i...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.1080/10408369991239259
更新日期:1999-12-01 00:00:00
abstract::This manuscript offers a broad overview of the state of emergency toxicology testing in clinical laboratories. We summarize the specific challenges of performing emergency toxicology testing, introduce a variety of currently used methods including mass spectrometry, and compare and contrast the utility of different ty...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.1080/10408363.2019.1585415
更新日期:2019-06-01 00:00:00
abstract::The science of blood rheology (study of the flow and deformability of blood) is of increasing practical importance to the investigation of blood disorders. In diagnostic laboratories, rheological tests such as the erythrocyte sedimentation rate, zeta sedimentation ratio, and plasma viscosity are used to monitor patien...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408369009105898
更新日期:1990-01-01 00:00:00
abstract::Antiphospholipid antibodies (aPL) constitute a heterogeneous group of autoantibodies that share the ability to bind phospholipids (PL) alone, protein-PL complexes, or PL-binding proteins. They have been detected in isolation, in association with autoimmune diseases such as systemic lupus erythematosus (SLE), and durin...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.1080/10408360601079549
更新日期:2007-01-01 00:00:00
abstract::Sepsis is an unusual systemic reaction to what is sometimes an otherwise ordinary infection, and it probably represents a pattern of response by the immune system to injury. A hyper-inflammatory response is followed by an immunosuppressive phase during which multiple organ dysfunction is present and the patient is sus...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408363.2013.764490
更新日期:2013-01-01 00:00:00
abstract::International standards and practice guidelines recommend the use of delta check alerts for laboratory test result interpretation and quality control. The value of contemporary applications of simple univariate delta checks determined as an absolute change, percentage change, or rate of change to recognize specimen mi...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.1080/10408363.2018.1540536
更新日期:2019-03-01 00:00:00
abstract::Despite great progress in prevention strategies, pharmacotherapy and interventional treatment of coronary artery disease (CAD), cardiovascular events still constitute the leading cause of mortality and morbidity in the modern world. Traditional risk factors, including hypertension, diabetes mellitus, smoking, obesity,...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408363.2014.913549
更新日期:2014-10-01 00:00:00
abstract::Cardiotoxicity, including acute and late-onset cardiotoxicity, is a well-known adverse effect of many types of antitumor agents. Early identification of patients with cardiotoxicity is important to ensure prompt treatment and minimize toxic effects. The etiology of chemotherapy-induced cardiotoxicity is multifactorial...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.1080/10408363.2016.1261270
更新日期:2017-03-01 00:00:00
abstract::Hemophilia care depends on several factors for the production of purified FVIII: plasma procurement, plasma logistics, production method, and efficacy. The latter two are restrictive factors, both for the supply and the safety of FVIII preparations. Conventional production methodology unavoidably recovers only 10 to 2...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408368609111596
更新日期:1986-01-01 00:00:00
abstract::Muscle wasting in patients with sepsis, severe injury, and cancer is associated with increased transcription of several genes regulating different proteolytic pathways. The involvement of gene activation in muscle wasting suggests that transcription factors and nuclear cofactors play important roles in the regulation ...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章
doi:10.3109/10408363.2011.591365
更新日期:2011-03-01 00:00:00
abstract::The aim of this review is to summarize present evidence of an association between circulating levels of C-reactive protein (CRP) and cancer risk, and to evaluate whether elevated circulating CRP levels cause cancer. Additionally, the review provides background information on the acute-phase response, chronic inflammat...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408363.2011.599831
更新日期:2011-07-01 00:00:00