Study of glycine solution in preparation of frozen thawed deglycerolized erythrocytes / 中国输血杂志

【Objective】 To study the protective effect of glycine solution on frozen red blood cell thawing process. 【Methods】 A total of 20 bags of 1 U of leukocytes reduced suspended red blood cells within 6 days were selected for the study. After mixing, each 2 bags of suspended red blood cells were divided into 2 bags and into two groups with 10 bags of 1 U in each group, and were frozen for storage. One group was deglycerolized with sodium chloride solution (control group), and one group was deglycerolized with glycine solution (experimental group). The hemoglobin, free hemoglobin, residual glycerol, total glycerol in red blood cells, adenosine triphosphate (ATP) and 2,3-diphosphoglycerate (2,3-DPG) were detected in the two groups. 【Results】 Compared with the free hemoglobin content (0.90±0.05)g/L and residual glycerol content (1.17± 0.08)g/L in the control group, the final product red blood cell supernatant free hemoglobin content (0.77±0.15)g/L and residual glycerol content (0.79±0.33)g/L in the experimental group were decreased, and the difference was statistically significant (P<0.05). Compared with the ATP content (4.03±0.38)µmol/gHb and 2,3-DPG content (485.65±78.08)µg/L in the control group, the ATP content (4.41±0.35)µmol/gHb and 2,3-DPG content (656.28±116.68)µ g/L in the experimental group were significantly increased, with statistical significance (P<0.05). 【Conclusion】 Using glycine solution instead of sodium chloride solution to prepare frozen thawed deglycerolized erythrocytes achieved the effect of protecting erythrocytes, reduced the hemolysis rate of erythrocytes and glycerin residue, and increased the recovery rate of erythrocytes.

A the Study on Relationship Among Diphosphoglycerate (2.3-DPG), Arteriovenous Oxygen Content Difference (A-VO2) and Tissue O2 Delivery of the Patients with Chronic Lung Disease (CLD) / 대한내과학회지

OBJECTIVES: The presence of chronic low oxygen delivery to the tissues (blood flow X Hb concentration X arterovenous oxygen content difference) in patients with chronic lung disease (CLD) leads to a aggravated dyspnea. Therefore, total oxygen delivery to the tissues is a reverse correlation with severity of dyspnea. So far, the treatment of patients with CLD has been limited to only the increase of ventilation and perfusion capacity. However, this study focused on the capacity of oxygen delivery to the tissues in patients with CLD. We measured blood oxygen parameters as one of the extended approaches. METHOD: Simultaneous arterial and venous blood samples from 15 patients with CLD at rest were evaluated for 2.3-DPG, CO-Hb (Carboxy-monohe-moglobin), Met-Hb (methomoglobin), ABGA (Arterial blood gas analysis), VBGA (Venous blood gas analysis) and Hb (Hemoglobin). Smokers and patients with other disease were excluded from the study in order to avoid the factors (2.3-DPG, CO-Hb etc.) which can shift the oxygen dissociation curve. There were 12 men and 3 women, ranging in age from 40 to 75 years. The disease onset varied from 3 years to more than 30 years. RESULTS: 1) As total oxygen delivery to the tissues decreased, Ao2(Arterial oxygen partial pressure) and A-VCb (Arteriovenous oxygen content difference) decreased, while 2.3-DPG increased. Total oxygen delivary to the tissues showed a significant correlation with more A-V and 2.3-DPG than AO2. 2) AO2 had a correlation with A-VO2 but AO2 did not clearly reflect A-VO2. 3) 2.3-DPG activity depended on more A-VO2 than AO2. 4) As A-VO2 decreased, there was more significant relationship among 2.3-DPG, A-VO2 and tissue oxygen delivery. 5) A-VO2 showed a significant reverse correlation with 2.3-DPG as well as Met-Hb % + CO-Hb %. 6) ACO2 (arterial carbon dioxide partial pressure) showed a correlation with 2.3-DPG as well as A-VO2. 7) Arterial PH did not correlate with 2.3-DPG as well as A-V. CONCLUSION: 1) AO2 in patient with CLD correlated with A-VO2 but AO2 did not clearly reflect A-V. 2) Total oxygen delivery (severity of dyspnea) showed a significant correlation with more A-VO2 and 2.3-DPG than AO2. 3) 2.3-DPG activity depended on more A-VO2 than AO2. 4) 2.3-DPG activity had a reverse correlation with A-V in spite that 2.3-DPG shifts the oxygen dissociation curve to the right, because 2.3-DPG shift is secondary change associated with the low oxygen delivery to the tissues, More extensive k prospective investigations are needed to clearly define correlation among A-VO2, 2.3-DPG and prognosis of patients with CLD.

Erythrocyte 2,3-DPG and ATP Concentration in Intraoperative Salvaged Blood and CPD Stored Blood / 대한마취과학회지

The purpose of this study is to compare the quality of intraoperative salvaged blood with that of Citrate Phosphate Dextrose(CPD) stored blood in 32 patients having cardiac surgery involving cardiopulmonary bypass. 20 patients in the control group received one week cild CPD stored blood and 12 patients received autologous intraoperative salvaged blood which prepared and processed with the Hemonetics Cell Saver Plus autotransfusion device. 1) Salvaged blood had a higher hemoglobin concentration(l7.6 vs 13.1 g/dl, P<0.005), a higher 2.3-diphosphoglycerate concentration(3.1 vs 0.6 mmol/L, P<0.005), higher pH(7.6 vs 6.8, P<0.005) than CPD stored blood group. Salvaged blood had a lower ATP concentration was(47.7 vs 67.7 pmol/dl, P<0.005) than stored blood group. 2) Platelet count was l3.4 X 10(9)/L and WBC count was 5.09 X 10(9)/L in salvaged blood. 3) Salvaged blood volume was 1411+/-487.9 ml(range 580 to 2325 ml). Intraoperative salvaged blood had a superior oxygen carrying and delivery capacity, but modification of washing is required to lessen the platelet and white blood cell count in the salvaged blood.

Effect of artificial carbon dioxide bathing on oxygen-dissociation curve of hemoglobin / 日本温泉気候物理医学会雑誌

Many researchers have pointed out that CO₂ bathing directly effects expanding dermal vessels. The authors have recently reported a decrease in red blood cell after CO₂ bathing. To clarify other effects of CO₂ bathing on RBC, the changes in the hemoglobinoxygen-dissociation curve (P50) were measured after single bathing (for 10 minutes at 40°C) with artificial CO₂ water made of sodium bicarbonate and citric acid dissolved in plain water. P50 was measured with an oxygen-dissociation analyzer (HEMO-O-SCAN^TM made by American Instrument Company) and 2, 3-diphosphoglycerate (2, 3-DPG) in RBC, with enzymatic analysis. The subjects of this study consisted of six male patients and four female patients, ranging from 53 to 80 years old.<br>The results are presented below.<br>1) Nine of ten patients showed an increase in P50 after 15 to 30 minutes of CO₂ bathing. The remainder showed a transient increase in P50.<br>2) No significant increase in 2, 3-DPG concentration in RBC was found in the group subjected to CO₂ bathing as compared to that of the controls who were subjected to plain water bathing. However, seven patients showed an increase in 2, 3-DPG after 15 to 30 minutes of CO₂ bathing, and three patients showed a decrease in 2, 3-DPG.<br>3) Partial pressures of oxygen (PO₂) and carbon dioxide (PCO₂) in the venous blood were measured. Elevation of PO₂, lowering of PCO₂, and increase in pH were observed in almost all patients after a single CO₂ bath.<br>From these results, we can conclude that a single CO₂ bath effectively decreases oxygen affinity of hemoglobin, presumably due to a rise in the blood temperature and partially due to an increase in 2, 3-DPG concentration in RBC.

Effects of physical training on red blood cell properties, in particular red cell 2,3-DPG and aerobic work capacity / 体力科学

The purpose of this study was to examine the effects of physical training on red blood cell properties, in particular red cell 2, 3-diphosphoglycerate (2, 3-DPG) and aerobic work capacity. The subjects were 28 healthy men and they were divided into three groups: Group 1 (12 athletes-long distance runners, cross country skiers performing daily aerobic training), Group 2 (8 athletes-sprinters (400 m), alpine skiers playing aerobic and anaerobic training every day) and Control (8 untrained persons) .<BR>The results obtained were as follows:<BR>1) In aerobic work capacity (VO<SUB>2</SUB>max/w, O<SUB>2</SUB> pulse max) there was significant difference (p<0.01) among 3 groups (Group 1>Group 2>Control) .<BR>2) Red blood cell properties (RBC, Hb, Hct) of each group showed no significant difference. However MCH, MCHC of Group 1 was significantly lower than Group 2 and Control, MCV was also a tendency to be lower. Red cell 2, 3-DPG concentration was significantly higher in Group 1, 2 as compared with Control. But there was no significant difference between Group 1 and Group 2.<BR>3) Red cell distribution curve of Group 1 tended to shift to the left in comparison with other two groups.<BR>4) The relationship between VO<SUB>2</SUB>max/w and red cell 2, 3-DPG significantly correlated for all subjects composing the three groups. In addition a significant correlation was found for Group 1.

Effects of exposure to simulated high altitude on red-cell 2,3-DPG, salivary cortisol and plasma testosterone levels during training in female swimmers / 体力科学

Thirteen female swimmers (ranging in age from 15 to 18 years) were selected as subjects and divided into two groups; group A (subjects of experiment) consisted of six subjects in whom low pressure was loaded and group B (subjects of control) consisted of seven in whom low pressure was not given.<BR>During training, circuit weight training was performed in a low pressure environment and it was combined with conventional swimming training. We studied the effect of these types of training on their red-cell 2, 3-diphosphoglycerate, salivary cortisol, and plasma testosterone.<BR>(1) The 2, 3-DPG level showed a greater increase after loading exercise than at the time of resting in both groups A and B. The increase was highly significant in group A. Additionally, 10 days after the removal of the loading, hemoglobin and hematocrit levels were significantly decreased in groups A and B, and a significant increase in 2, 3-DPG was observed in group A.<BR>(2) Only after loading low pressure was the cortisol level higher in group A than in group B. However, there was no significant difference between the two groups in the amount of exercise loading when heart rate was used as the index.<BR>(3) Testosterone tended to show a greater increase after exercise loading than on the first day of the experiment. However, neither an effect of exposure to low pressure on testosterone nor a significant difference between the two groups was observed.<BR>According to the results, in swimming, an endurance contest, physical changes during training are almost the same in group A and B, but it is considered that a concurrent severe hypoxic condition as a result of low pressure loading brings about homeostasis in the living body and the homeostasis leads to an attempt to increase oxygen uptake by the tissues, yeilding increased staying power.