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  • 1
    ISSN: 1432-0428
    Keywords: Blood glucose ; continuous blood glucose analysis ; diabetes therapy criteria ; unstable diabetes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Individual blood glucose (BG) measurements at selected time points were compared with continuously recorded BG data as criteria of the adequacy of diabetes regulation. Indices reflecting the adequacy of diabetes regulation have previously been developed from continuously monitored BG measurements during studies under standardized near-normal living conditions. These indices are: (1) mean amplitude of glycemic excursions (MAGE), (2) diurnal mean blood glucose (MBG), (3) mean of daily differences of paired BG values (MODD). Because of the intensive studies necessary to obtain these indices, approximations based on individual BG measurements which might easily be obtained in practice were sought. The BG value 80 min after breakfast correlated best with the MAGE. The average of the fasting BG value and the value at 80 min after breakfast correlated well with the MBG. These individual BG measurements distinguished the groups of subjects. The difference between fasting BG values on successive days (AFBG) correlated well with the MODD. However, unlike MODD itself, AFBG did not distinguish the groups of subjects. Some other selected BG values with different timing were nearly equally highly correlated with these three criteria of BG behavior. Thus, relatively few but critically timed BG measurements on successive days, with suitable urinary glucose measurements, during standardized therapeutic programs may serve as an index of the efficacy of the therapy. By these same means, the characteristics of the patient's diabetes might also be assessed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-2568
    Keywords: occult gastrointestinal bleeding ; hemoglobin degradation ; HemoQuant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract 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 of total fecal hemoglobin, was similar with upper gastrointestinal and proximal colon lesions. Within the colon, values trended downward with more distal location: means ± standard deviations were 18±14 proximal colon, 16 ±15 sigmoid, and 10±10 rectum. The amount of fecal blood also affected the intestinal converted fraction; correcting for hemoglobin concentration improved separation by site. Corrected intestinal converted fraction values were significantly lower with rectal (P〈 0.0005) and sigmoid (P〈0.02) lesions than with proximal colon lesions. Unfortunately, large within-site variation caused considerable overlap between sites. We conclude that the intestinal converted fraction is influenced by the site and amount of bleeding. However, its clinical utility is compromised by substantial individual differences in luminal hemoglobin metabolism.
    Type of Medium: Electronic Resource
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