occult bleeding


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Related to occult bleeding: hematochezia

bleeding

 [blēd´ing]
1. escape of blood from an injured vessel; see also hemorrhage.
2. phlebotomy.
dysfunctional uterine bleeding bleeding from the nonmenstruating uterus when no organic lesions are present.
implantation bleeding that occurring at the time of implantation of the zygote in the decidua.
occult bleeding escape of blood in such small quantity that it can be detected only by chemical tests or by microscopic or spectroscopic examination.
bleeding time the time required for a standardized wound to stop bleeding. The bleeding time test is used as a screening procedure to detect both congenital and acquired platelet disorders; it measures the ability of platelets to arrest bleeding and hence gives an estimate of platelet number and level of functioning. There are several methods of performing the bleeding time. In Ivy's test, incisions are made on the forearm, a sphygmomanometer is inflated to a standard of 40 mm around the upper arm, and the time until cessation of bleeding is recorded. The template method is a variation in which a template with a slit in it is laid on the forearm, and the slit and the knife making the skin incision are both standardized. The most widely used template is the Simplate. Normally bleeding will cease in 2 to 9 minutes. Qualitative platelet disorders, thrombocytopenia (platelet count of less than 100,000/mm3), and the use of aspirin will prolong the bleeding time.

oc·cult blood

blood in the feces in amounts too small to be seen but detectable by chemical tests.

occult bleeding

See Occult blood.

bleeding

1. the escape of blood, as from an injured vessel. See also hemorrhage.
2. the purposeful withdrawal of blood from a vessel of the body; venesection; phlebotomy. See also blood sampling.

bleeding disorders
incomplete bleeding
the carcass of an animal slaughtered for meat which is incompletely bled out has a darker meat and more blood in vessels and the heart cavities than a properly slaughtered animal. This gives it an appearance resembling a fevered carcass.
occult bleeding
escape of blood in such small quantity that it can be detected only by chemical tests or by microscopic or spectroscopic examination.
bleeding time
the time required for a small pinpoint wound to cease bleeding. If done properly, the test can be helpful in determining the functional capacity of platelets and of vasoconstriction.
References in periodicals archive ?
Stelling, Maimon, Smith, Haddy, and Markert (1990) compared five different fecal occult blood tests for early detection of gastrointestinal pathology and recommended that the guiac test be used in combination with the monoclonal nonspecific test for human hemoglobin for mass screening and early detection of occult bleeding.
Mild reductions in renal function, occult bleeding and protein loss from the gut, and minor changes in organ function produced by NSAIDs in frail old people could contribute substantially to morbidity in ways yet to be fully understood.
The doctor noted a "slightly inflamed hemorrhoid" on anoscopy, but no bleeding from the hemorrhoid; he didn't test for occult bleeding.
Is the syncope a symptom of an occult noncardiac life-threatening process (for instance, pulmonary embolism, occult bleeding, transient ischemic attack, or subarachnoid hemorrhage)?
The oldest indicator for occult bleeding is gum guaiac, in use from the 1860s.
Prior to SpHb, measuring hemoglobin was an invasive, time-consuming, and intermittent process that often resulted in delayed detection and intervention of occult bleeding.
Masimo's noninvasive and continuous total hemoglobin monitoring (SpHb[TM]) may help clinicians quickly detect chronic or acute anemia, identify occult bleeding earlier and more effectively manage blood transfusions.