March 5, 2023 admin

Dating out-of Bloodstream Temperature, Viscosity, and you may Pressure

Dating out-of Bloodstream Temperature, Viscosity, and you may Pressure

The fresh new glucose levels focus measurements were made with an Accutrend GC glucometer (Boehringer Mannheim, Mannheim, Germany). At least five size of blood sugar and parallel size of bloodstream and you will plasma viscosity have been made for everyone of one’s 3step 1 circumstances during the 0, 30, 60, and you will 120 minute within twenty-two°C, once consumption of 75 grams off glucose.

Analytical Review

Results of the first group was in fact analyzed statistically to your College student t ensure that you Spearman relationship try. The relationship between blood sugar focus and viscosity was analyzed mathematically making use of the Student t decide to try, analysis out of variance, and you will regression analysis.


When the blood temperature decreased from 36.5° to 22°C, the mean blood free flow time increased from to sec (%). According to Poiseuille’s equation, the blood flow rate decreases %, and for the compensation of this ischemic state, a % BP increase or 5.9% vasodilation is needed. If viscosity (? in the denominator of the equation) changes from 100 to (%), the flow rate Q would decrease = %. If viscosity increases %, the pressure (F1 ? F2) value (multiplier in the equation) must be increased with the same percentage to keep the equation constant. When the viscosity increases %, to helpful site keep the flow rate constant, the radius of vessel (initial) a 4 , must increase %. The calculation of this increased radius (latest) is a 4 final = 1.2613 ? a 4 initial. From this calculation, ?final = = 1.0597 and so, 5.97% vasodilation can be estimated.

In the event the temperature enhanced of thirty six.5° to help you 39.5°C, this new bloodstream totally free circulate big date diminished from to help you sec (%). Within condition, the latest blood circulation speed enhanced %; based on Poiseuille’s picture, an effective % reduction of BP or 2.71% vasoconstriction are had a need to secure the hemodynamic balance ongoing.

The correlation between temperature and blood viscosity is r = ?0.84, P < .001 when all the differences at the three temperatures are evaluated together (Fig. 1). When all of the blood free flow time data for the three temperatures were evaluated together according to age, there was a negative correlation (r = ?0.1381 and P < .05); when the data were evaluated according to sex, it was found that the mean blood free flow time in women was % less than that in men (r = 0.3408, P < .001).

Effect of temperature on blood viscosity. When blood temperature decreases from 36.5° to 22°C, blood viscosity increases %. If temperature increases from 36.5° to 39.5°C, blood viscosity decreases %. To make a more accurate presentation in the graphic representation and statistics, instead of the “relative viscosity” value, blood free flow time in seconds (s) was used as data. When all of the differences at three temperatures are evaluated together, a negative correlation is seen between blood temperature and viscosity (r = ?0.84, P < .001).

When the temperature decreased from 36.5° to 22°C, plasma free flow time rose from 4.81 to 5.71 sec (%); with a temperature increase from 36.5° to 39.5°C, it decreased from 4.78 to 4.57 sec (4.99%). A negative correlation was seen (r = ?0.9342, P < .001) when the plasma flow times at the three temperatures were evaluated together. With a temperature decrease from 36.5° to 22°C, erythrocyte free flow time increased from to sec (%). When the temperature increased from 36.5° to 39.5°C, erythrocyte free flow time decreased from to sec (9.92%). There was a negative correlation between temperature and erythrocyte free flow time (r = ?0.62, P < .001). All of the blood, plasma viscosity, and erythrocyte deformability differences due to temperature were statistically significant (P < .001).

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