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Faecal haem-porphyrin assay by the HemoQuant method has many practical advantages over the well-validated, radiochromium (51Cr-tagged red cell) method for measuring gastrointestinal blood loss. Because haem may be absorbed but the chronic ion is not, the two measures were directly compared in
1. A method for the detection of gastrointestinal blood loss based upon the selective measurement of faecal porphyrins was tested in two studies in healthy volunteers. 2. In the first study subjects (n = 6) received intragastric autologous blood (saline, 2 and 6 ml as a single dose) resulting in a
An Escherichia coli isolate was recovered from a 92-year-old female patient with urinary tract infection. Gram-stained preparation of the urine sediment manifested some gram-negative rod-shaped cells, and the urine specimen culture yielded nonhemolytic colonies on sheep blood agar plate. However, no
BACKGROUND
Various methods exist for the assessment of faecal occult blood loss in a patient with suspected gastrointestinal blood loss.
METHODS
The present study examined the effectiveness and financial implications of a qualitative guaiac-based method (Haemoccult) of faecal occult blood detection
Efficacy of cimetidine in the prevention of aspirin-induced gastric hemorrhage was evaluated, using 4 groups of 6 dogs given: Group 1--controls; group 2-7.5 mg of cimetidine/kg of body weight every 8 hours; group 3-7.5 mg of cimetidine/kg every 8 hours and 35 mg of nonbuffered aspirin/kg every 8
OBJECTIVE
To compare rates of detection of occult upper gastrointestinal (GI) tract bleeding by guaiac (Hemoccult II [HO]), immunochemical (HemeSelect [HS]), and heme-porphyrin (HemoQuant [HQT]) fecal occult blood tests. PATIENTS, SUBJECTS, AND METHODS: In a cross-sectional study to detect native
Hemoglobin-heme is variably converted to porphyrin during enterocolic transit. This intestinal converted fraction, as measured by HemoQuant, was elevated as a predictor of the occult bleeding site in 152 patients with discrete lesions. The intestinal converted fraction, expressed as the percentage
A 47-year-old man presented with abdominal pain, neck stiffness, severe transient hypertension and unusually dark urine. Cerebrospinal fluid investigations and angiography confirmed the diagnosis of a subarachnoid haemorrhage. Porphyrin studies on the patient and his family demonstrated that the
The HemoQuant test includes the measurement of total fecal hemoglobin (Hb) or porphyrin derived from heme, and of intestinal converted fraction (ICF) which is the performed porphyrin probably by bacteria during enterocolic transit. The mean +/- SD of HemoQuant in 31 healthy subjects was 0.57 +/-
The NF-E2 related factor 2 (Nrf2) could be activated in intracerebral hemorrhage (ICH), and trigger the expression of ARE regulated heme oxygenase 1 (HO-1) subsequently. This study aims to explore neuroprotection of HO-1 protein in regulating the Nrf2-ARE signaling pathway in ICH. In this study, the
Occult gastrointestinal blood loss induced by a new buffered aspirin preparation (Ostoprin, 4.0 g per day) was compared with that from an enteric-coated aspirin (Ecotrin, 3.9 g per day) in 40 patients with osteoarthritis. Blood loss was measured by the radiochromium method and compared with the
1. The aim of this study was to investigate the relation between microvascular and venous oxygen pressures during haemorrhagic shock and resuscitation in the pig intestine. To this end microvascular PO2 (microPO2) was measured by quenching of Pd-porphyrin phosphorescence by oxygen and validated for
Periodontal disease is an inflammatory process affecting supporting tissues surrounding the teeth. The anaerobic gram-negative bacterium Porphyromonas gingivalis is implicated in the disease. This organism requires the uptake of porphyrins most apparently as haem 1 from local haemorrhage and it has
Only a fraction of haem (ferroprotoporphyrin) finding its way into the gut lumen is absorbed; the major portion enters the colon. There, unabsorbed haem, together with any haem of haemoproteins shed directly into the colonic lumen as haemoglobin or other haemoproteins, are converted by bacteria to a
Blood loss in faeces was assessed by three different methods in five patients with recurrent iron deficiency. In short term (12 day) studies chemical analysis of complete stool collections for haemderived porphyrins (HemoQuant) gave results closely correlated with those obtained by measuring stool