Red Cell 2,3 DPG, ATP, and Creatine Levels in Preserved Red Cells and in Patients with Red Cell Mass Deficits or with Cardiopulmonary Insufficiency

1970 ◽  
pp. 289-303 ◽  
Author(s):  
C. Robert Valeri ◽  
Normand L. Fortier
Keyword(s):  
Cell Mass ◽  
Red Cells ◽  
Red Cell ◽  
Red Cell Mass ◽  
2,3 Dpg

scholarly journals Improving Autologous Blood Harvest: Recovery of Red Cells from Sponges and Suction

1987 ◽  
Vol 15 (4) ◽  
pp. 421-424 ◽  
Author(s):  
A. K. Ronai ◽  
J. J. Glass ◽  
A. S. Shapiro
Keyword(s):  
Blood Loss ◽  
Autologous Blood ◽  
Cell Mass ◽  
Haemoglobin Concentration ◽  
Red Cells ◽  
Red Cell ◽  
Cell Salvage ◽  
Donor Blood ◽  
Red Cell Mass ◽  
Free Haemoglobin

The efficacy of red cell salvage was assessed under circumstances which simulated blood loss managed with sponges or suction. Expired banked blood was equally divided and processed by either suction, or absorbing the blood on a sponge followed by rinsing the sponge in saline. These two techniques were used to harvest washed, centrifuged erythrocytes. The volume, haematocrit and free haemoglobin concentration of the banked blood and the processed units were measured, and smears from all units were examined microscopically. The red cell mass was calculated as the product of the volume and haematocrit. The red cell mass recovered by suction and from sponges averaged 93% and 87% respectively. Blood lost in sponges can be recovered and used to increase the available autologous blood, thereby reducing the need for donor blood.

Hydroxyurea Induces Expression of HbF and Increase of P50 in High Oxygen Affinity Hemoglobinopathy.

Blood ◽  
2004 ◽  
Vol 104 (11) ◽  
pp. 3730-3730
Author(s):  
Ghislain Cournoyer ◽  
Harry Bard ◽  
Xiaoduan Weng ◽  
Louise Robin ◽  
Carmen Gagnon ◽  
...  
Keyword(s):  
Cell Mass ◽  
Oxygen Affinity ◽  
High Oxygen ◽  
Red Cell ◽  
Subsequent Increase ◽  
Exon 2 ◽  
Red Cell Mass ◽  
High Oxygen Affinity ◽  
High O2 ◽  
2,3 Dpg

Abstract Introduction: A 38-year-old causasian male with hepatomegaly, splenomegaly and erythrocytosis (Ht 69.2%, Hb 217 g/L, MCV 76fl, normal WBC and platelets counts) presented with flank pain found to be a renal artery thrombosis. He had a history of increased Ht since birth without bone marrow (BM), cardiac, pulmonary, renal or cerebral anomalies and for which a diagnosis of a high oxygen affinity hemoglobinopathy was made. The disease had previously been uncomplicated without therapy. Initial evaluation in our center revealed a normal BM morphology, a normal karyotype and an abnormal Hb HPLC (elevated HbF (4.9%) and an abnormal Hb eluting after normal HbA1). The red cell mass was increased at 74.9 ml/kg (normal = 26.5 ml/kg). The oxygen (O2) P50 saturation determined from the Hb-O2 dissociation curve using an Hemox-Analyser was markedly decreased at 6 mmHg (normal = 27 mmHg). α and β globins (gb) HPLC demonstrated normal α, but 100% abnormal β-gb. A diagnosis of a double heterozygote for β-gb gene was established: an allele with mutation causing high affinity for O2 and an allele causing β-thalassemia (thal) minor. Anticoagulation and serial phlebotomies did not improve the erythrocytosis. Therapy with hydroxyurea (HU) was therefore proposed to the patient. Objectives: To determine the β-gb genotype and to evaluate the effect of HU therapy at maximally tolerated dose (MTD) on induction of HbF and its effect on Ht, P50, red cell mass, 2,3-DPG and total HbNO concentrations. Methods and results: Sequencing of the β-gb locus was done by RT-PCR amplified mRNA and by PCR amplified DNA, using primers spanning almost the entire gene (−450 to 601 bp, excluding a small portion of IVS2). Two mutations were identified: Leu96→Val (339C→G) in exon 2, producing Hb Regina, a high O2 affinity hemoglobin variant, and IVS1-110 G/A, a frequent mutation causing β-thal minor. Therapy with HU was initiated at 7 mg/kg/day. Dose was increased to MTD resulting in a dose of 25 mg/kg/day. Table 1 summarizes variations in relevant parameters while on HU therapy. Conclusion: HU rapidly induced HgF and improved measured parameters in this patient with a high O2 affinity Hb/β-thal minor. HU’s effect in this case did not seem to be strictly related to its anti-proliferation properties. Induction of HbF and subsequent increase in P50 probably reduced Epo production (data pending) and erythropoiesis. Modifications in other mediators of O2 release were also modified by HU. The changes in HbNO are not totally consistant with the rest of the data, being increased at 3 months but decreased at 6 months. While on HU therapy, the patient did not present any new complications (thrombotic or other) and clinically reported an improved exercise tolerance. Further evaluation will focus on epigenetic factors affecting HbF expression and correlation of NO level with plasma L-arginine concentration. Time HU dose (mg/kg) Ht (%) HbF (%) P50 (mm/Hg) 2,3-DPG (umol/g Hb) Total HbNO (nM) Red cell mass (ml/kg) NA: not available, TBD: to be determined Baseline 0 61.1 3.6 6 21.3 242.7 74.9 3 months 21 69.4 9.1 6 19.0 694.3 NA 6 months 25 56.9 15.1 9 21.4 105.8 NA 8 months 25 46.7 25.4 TBD TBD TBD 51.7

scholarly journals Further Observations on Polycythemia in Hepatocellular Carcinoma

Blood ◽  
1961 ◽  
Vol 18 (5) ◽  
pp. 592-598 ◽  
Author(s):  
Y. W. KAN ◽  
A. J. S. MCFADZEAN ◽  
D. TODD ◽  
S. C. TSO
Keyword(s):  
Hepatocellular Carcinoma ◽  
Direct Measurement ◽  
Cell Mass ◽  
Red Cells ◽  
Cirrhosis Of The Liver ◽  
Red Cell ◽  
Red Cell Mass ◽  
Stimulating Factor ◽  
Fasted Rats

Abstract Direct measurement of the red cell mass has confirmed a previous report of the occurrence of polycythemia in patients with hepatocellular carcinoma. Twenty patients (17 males and 3 females) have been investigated. The red cell mass was increased in 11, normal in 8 and reduced in one. Because of hypervolemia, present in 15 of the 20 patients investigated and attributable to the associated cirrhosis of the liver, the hematocrit might be normal in the presence of an increased red cell mass. A venous hematocrit of 48 per cent and above was found invariably to be associated with an increase in the red cell mass. Using this criterion, 17 of 145 patients with hepatocellular carcinoma were found to be polycythemic, an incidence of 11.7 per cent. Plasma erythropoietic stimulating factor determined by Fe59 incorporation into red cells of fasted rats was not increased in 4 patients with hepatocarcinoma and polycythemia. These findings are briefly discussed.

scholarly journals The Metabolism of Transferrin-bound 111In and 59Fe in the Rat

Blood ◽  
1974 ◽  
Vol 43 (5) ◽  
pp. 693-701 ◽  
Author(s):  
Michael R. Beamish ◽  
Elmer B. Brown
Keyword(s):  
Cell Mass ◽  
Red Cells ◽  
In Vivo Studies ◽  
Red Cell ◽  
Red Marrow ◽  
Significant Difference ◽  
Red Cell Mass ◽  
Residual Radioactivity ◽  
Uptake And Release

Abstract The metabolism of transferrin-bound indium and iron were compared by in vivo studies in the rat. Rats were injected with serum transferrin labeled with 111In and 59Fe, and, at intervals ranging from 20 min to 5 days after injection, they were killed. They were perfused through the portal vein with 200 ml of 0.9% saline, and the residual radioactivity, expressed as a percentage of the injected dose, was measured in liver, spleen, kidney, muscle, washed red cells, red marrow, and femur. At 5 days, 76% of the injected 59Fe was recovered in the red cell mass; only 1%-2% of 111In could then be recovered. Uptake and release of the 111In label by the femur was markedly less than that of the 59Fe. Whereas 85% of the injected 59Fe could be recovered from the circulating red cells, liver, and spleen, only about 15% of the injected 111In could be so recovered. Approximately 35% of the injected 111In was excreted, and 43% was recoverable from the carcass. The subcellular distribution of the two isotopes in the liver at timed intervals following intravenous injection was studied. While 35% of the 59Fe activity in the homogenate was associated with ferritin, only 4% of the 111In could be so identified. The results indicate a significant difference between the metabolism of 111In and 59Fe in the rat and make it unlikely that the metabolism of In in man bears much similarity to that of iron.

Letters to the Editor

PEDIATRICS ◽  
1967 ◽  
Vol 40 (5) ◽  
pp. 926-926
Author(s):  
ARTHUR J. MOSS ◽  
MICHELLE MONSET-COUCHARD
Keyword(s):  
Cell Mass ◽  
Time Factor ◽  
Red Cells ◽  
Red Cell ◽  
Letters To The Editor ◽  
Uterine Contractions ◽  
Red Cell Mass ◽  
The Many ◽  
Definition Of

Many of the issues raised by Dr. Baum are discussed in the original article, i.e., the importance of the influence of gravity and of uterine contractions as well as the onset of respirations and the time factor. Because of the many unknown and complex factors, a definition of placental transfusion was not attempted. Concerning Dr. Baum's proposed definition, it would seem to be purely theoretic to consider a "redistribution" of red cells between the placental and fetal circulations since, to our knowledge, neither the total circulating red cell mass of the placenta and baby nor its prenatal distribution is known.

Troglitazone has no effect on red cell mass or other erythropoietic parameters

1999 ◽  
Vol 55 (2) ◽  
pp. 101-104 ◽  
Author(s):  
M. M. R. Young ◽  
L. Squassante ◽  
J. Wemer ◽  
S. P. van Marle ◽  
P. Dogterom ◽  
...  
Keyword(s):  
Cell Mass ◽  
Red Cell ◽  
Red Cell Mass

Should Whole-Body Red Cell Mass Be Measured or Calculated?

2000 ◽  
Vol 26 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Ingrid Balga ◽  
Max Solenthaler ◽  
Miha Furlan
Keyword(s):  
Cell Mass ◽  
Whole Body ◽  
Red Cell ◽  
Red Cell Mass

Analysis of Red Cell Mass and Plasma Volume in Patients With Polycythemia

2005 ◽  
Vol 129 (1) ◽  
pp. 89-91 ◽  
Author(s):  
Mordechai Lorberboym ◽  
Naomi Rahimi-Levene ◽  
Helena Lipszyc ◽  
Chun K. Kim
Keyword(s):  
Body Weight ◽  
Plasma Volume ◽  
Cell Mass ◽  
Mean Value ◽  
Whole Body ◽  
Red Cell ◽  
Volume Data ◽  
Red Cell Mass ◽  
The Mean ◽  
Iodine 125

Abstract Context.—Polycythemia describes an increased proportion of red blood cells in the peripheral blood. In absolute polycythemia, there is increased red cell mass (RCM) with normal plasma volume, in contrast with apparent polycythemia, in which there is increased or normal RCM and decreased plasma volume. In order to deliver the appropriate treatment it is necessary to differentiate between the two. Objective.—A retrospective analysis of RCM and plasma volume data are presented, with special attention to different methods of RCM interpretation. Design.—The measurements of RCM and plasma volume in 64 patients were compared with the venous and whole-body packed cell volume, and the incidence of absolute and apparent polycythemia was determined for increasing hematocrit levels. Measurements of RCM and plasma volume were performed using chromium 51–labeled red cells and iodine 125–labeled albumin, respectively. The measured RCM of each patient was expressed as a percentage of the mean expected RCM and was also defined as being within or outside the range of 2 SD of the mean. The results were also expressed in the traditional manner of mL/kg body weight. Results.—Twenty-one patients (13 women and 8 men) had absolute polycythemia. None of them had an increased plasma volume beyond 2 SD of the mean. When expressed according to the criteria of mL/kg body weight, 17 of the 21 patients had abnormally increased RCM, but 4 patients (19%) had a normal RCM value. Twenty-eight patients had apparent polycythemia. The remaining 15 patients had normal RCM and plasma volume. Conclusions.—The measurement of RCM and plasma volume is a simple and necessary procedure in the evaluation of polycythemia. In obese patients, the expression of RCM in mL/kg body weight lacks precision, considering that adipose tissue is hypovascular. The results of RCM are best described as being within or beyond 2 SD of the mean value.

Failure of prolonged exercise training to increase red cell mass in humans

1996 ◽  
Vol 270 (1) ◽  
pp. H121-H126 ◽  
Author(s):  
J. K. Shoemaker ◽  
H. J. Green ◽  
J. Coates ◽  
M. Ali ◽  
S. Grant
Keyword(s):  
Exercise Training ◽  
Prolonged Exercise ◽  
Cell Mass ◽  
Hemoglobin Concentration ◽  
Red Cell ◽  
Total Blood ◽  
Mean Cell Volume ◽  
Red Cell Mass ◽  
Mean Cell Hemoglobin

The purpose of this study was to investigate the time-dependent effects of long-term prolonged exercise training on vascular volumes and hematological status. Training using seven untrained males [age 21.1 +/- 1.4 (SE) yr] initially consisted of cycling at 68% of peak aerobic power (VO2peak) for 2 h/day, 4-5 days/wk, for 11 wk. Absolute training intensity was increased every 3 wk. Red cell mass (RCM), obtained using 51Cr, was unchanged (P > 0.05) with training (2,142 +/- 95, 2,168 +/- 86, 2,003 +/- 112, and 2,080 +/- 116 ml at 0, 3, 6, and 11 wk, respectively) as were serum erythropoietin levels (17.1 +/- 4.3, 13.9 +/- 3.5, and 17.0 +/- 2.0 U/l at 0, 6, and 11 wk, respectively). Plasma volume measured with 125I-labeled albumin and total blood volume (TBV) were also not significantly altered. The increase in mean cell volume that occurred with training (89.7 +/- 0.95 vs. 91.0 +/- 1.0 fl, 0 vs. 6 wk, P < 0.05) was not accompanied by changes in either mean cell hemoglobin or mean cell hemoglobin concentration. Serum ferritin was reduced 73% with training (67.4 +/- 13 to 17.9 +/- 1 microgram/l, 0 vs. 11 wk, P < 0.05). Total hemoglobin (HbTot) calculated as the product of hemoglobin concentration and TBV was unaltered (P > 0.05) at both 6 and 11 wk of training. The 15% increase in VO2peak (3.39 +/- 0.16 to 3.87 +/- 0.14 l/min, 0 vs. 11 wk, P < 0.05) with training occurred despite a failure of training to change TBV, RCM, or HbTot.

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