Klinische Monatsblätter für Augenheilkunde
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Klin Monbl Augenheilkd · Feb 2000
Comparative Study[Ocular hemoglobinometry--physiological variations].
To explore the relationship between ocular (fundus) hemoglobin and that sampled and measured conventionally. To look for differences in hemoglobin density determined by both methods when the body hemoglobin is acutely (blood donation) or pathologically e.g. anemia altered. ⋯ Comparison of conventional and ocular determination of hemoglobin reveals good correlation in healthy people. However, in acute or chronic blood loss the papillary hemoglobin level differs from that measured peripherally. A gender-related regulatory capacity of the ocular tissues under low-level conditions can be shown: Male persons maintain ocular hemoglobin at a normal level even when peripheral hemoglobin falls to low values, whereas female persons show a decrease in ocular hemoglobin parallel to the venous levels. Hence, under such extreme conditions,--and only in males--the ocular method yields values other than those from the conventional method, because ocular regulatory mechanisms, otherwise undetected, are exquisitely revealed.