English
TitleDilution by Physiological Saline Deteriorates Color Discrimination of Arterial and Venous Blood
Subtitle
AuthorsKazuhide Takeyama*, Toshiyasu Suzuki*, Satoshi Saitoh*, Akira Tanaka**
Authors(kana)
Organization*Department of Anesthesiology, Discipline of Surgery, Tokai University School of Medicine, **Department of Surgery, Discipline of Surgery, Tokai University School of Medicine
JournalCirculation Control
Volume23
Number2
Page158-163
Year/Month2002/
ArticleOriginal article
PublisherJapan Society of Circulation Control
AbstractWe investigated differences in color when distinguishing arterial blood and venous blood with or without the use of physiological saline. The study samples were comprised of undiluted blood samples, blood samples diluted with physiological saline, blood samples from patients with decreased hemoglobin levels, and blood samples from patients with normal hemoglobin levels. initially, four sample types （arterial blood, venous blood, 2-fold dilution of venous blood with physiological saline, and 3-fold dilution of venous blood with physiological saline） were observed and judged as arterial or venous samples by anesthesiologists under operating light and indoor light. Thereafter, the density of three colors （red, green, and blue） was investigated by a computer. Two-fold dilution of venous blood with physiological saline was most frequently misjuged as arterial blood. Computerized analysis showed that a 2-fold dilution of venous blood had a higher density of red than an arterial blood sample, The red color of a 2-fold dilution of venous blood appeared stronger than that of an arterial blood sample, thereby making it difficult to distinguish between the two samples. Accordingly, we consider that dilutions with physiological saline makes it difficult to distinguish between arterial and venous blood.
PracticeBasic medicine
KeywordsDilution, Physiological-saline, Colordiscrimination

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