# Relationships regarding Bloodstream Temperature, Viscosity, and you can Pressure

Relationships regarding Bloodstream Temperature, Viscosity, and you can Pressure

The fresh new glucose levels concentration specifications were made that have a keen Accutrend GC glucometer (Boehringer Mannheim, Mannheim, Germany). At the least five size of glucose levels and simultaneous size of blood and plasma viscosity have been made for everyone of your own 30 times in the 0, 31, 60, and you may 120 minute during the twenty two°C, once ingestion out of 75 g out-of glucose.

## Statistical Investigations

Outcome of the very first category was basically examined statistically towards Scholar t test and Spearman correlation attempt. The relationship ranging from blood glucose levels quantity and you may viscosity are analyzed statistically using the Pupil t sample, data from difference, and you can regression study.

## Results

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 keep the flow rate constant, the radius of vessel (initial) a 4 , must increase %. The calculation of this increased radius (finally) is a 4 final = 1.2613 ? a 4 initial. From this calculation, ?final = = 1.0597 and so, 5.97% vasodilation can be estimated.

If the temperatures improved from thirty-six.5° so you can 39.5°C, the fresh blood 100 % free disperse date diminished off so you can sec (%). Within this state, this new blood circulation rates improved %; considering Poiseuille’s formula, a % decrease in BP otherwise 2.71% vasoconstriction is actually necessary to secure the hemodynamic balance constant.

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 https://datingranking.net/gay-hookup/ 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).