The influence of arterial pressure changes on blood volume replacement after acute hemorrhage in the alert rat

1983 ◽  
Vol 78 (5) ◽  
pp. 571-582 ◽  
Author(s):  
O. Aziz ◽  
E. Sommer
Keyword(s):  
Arterial Pressure ◽  
Blood Volume ◽  
Volume Replacement ◽  
Acute Hemorrhage ◽  
Alert Rat ◽  
Pressure Changes ◽  
Blood Volume Replacement

Effect of associated injuries and blood volume replacement on death, rehabilitation needs, and disability in blunt traumatic brain injury

1991 ◽  
Vol 19 (10) ◽  
pp. 1252-1298 ◽  
Author(s):  
JOHN H. SIEGEL ◽  
DAVID R. GENS ◽  
TANYA MAMANTOV ◽  
FRED H. GEISLER ◽  
SHIRIN GOODARZI ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Blood Volume ◽  
Volume Replacement ◽  
Associated Injuries ◽  
Rehabilitation Needs ◽  
Blood Volume Replacement

Functional diagrams of flow and volume for the dog's lung

1982 ◽  
Vol 52 (4) ◽  
pp. 1035-1042 ◽  
Author(s):  
D. S. Moffatt ◽  
A. C. Guyton ◽  
T. H. Adair
Keyword(s):  
Arterial Pressure ◽  
Blood Volume ◽  
Arterial Compliance ◽  
Venous Pressure ◽  
Flow Characteristics ◽  
Transpulmonary Pressure ◽  
Pulmonary Vasculature ◽  
Venous Compliance ◽  
Lung Weight ◽  
Pressure Changes

Quantitative diagrams have been constructed from data obtained in isolated perfused dog lungs for the multiple interrelationships among pressure, volume, and flow characteristics of the pulmonary vasculature. These characteristics are described in the form of functional diagrams for flows from 0.3 to 1.0 l . min-1 . 100 g wet lung weight-1 (WLW), for venous pressures from -8 to +14 Torr, and for arterial pressures from 16 to 30 Torr. The quantitative relationships were shown not to change significantly as the transpulmonary pressure changes within the range from 3 to 10 Torr. The change in blood volume with arterial pressure, called the “distributed arterial compliance,” averaged 1.5 g . Torr-1 . 100 g WLW-1. This compliance was nearly constant over the range of arterial pressure studied. On the other hand, the change in blood volume with venous pressure, called the 'distributed venous compliance” was different for different levels of venous pressures. Its maximum value was 1.04 g . Torr-1 . 100 g WLW-1 when the venous pressure was near 2 Torr. At venous pressures both above and below this pressure level this compliance decreased. These distributed compliances are described as resulting to a significant extent from changes in flow patterns through the pulmonary circulation rather than being direct indications of the true vascular compliances.

Specific Therapy in Water, Electrolyte and Blood-volume Replacement during Pediatric Surgery

1975 ◽  
Vol 42 (2) ◽  
pp. 187-193 ◽  
Author(s):  
Eric B. Furman ◽  
D. Garry Roman ◽  
Lemmer ◽  
John Hairabet ◽  
Miroslawa Jasinska ◽  
...  
Keyword(s):  
Blood Volume ◽  
Pediatric Surgery ◽  
Volume Replacement ◽  
Specific Therapy ◽  
Blood Volume Replacement

Blood Volume Replacement in Surgical Patients

1956 ◽  
Vol 36 (2) ◽  
pp. 301-313 ◽  
Author(s):  
Frank A. Perry ◽  
Henry T. Randall ◽  
J. William Poppell ◽  
Kathleen E. Roberts
Keyword(s):  
Blood Volume ◽  
Volume Replacement ◽  
Surgical Patients ◽  
Blood Volume Replacement

Changes in circulating blood volume influence aortic characteristic impedance in awake dogs

1984 ◽  
Vol 246 (4) ◽  
pp. H579-H584
Author(s):  
D. N. Stone ◽  
J. P. Dujardin ◽  
H. S. Klopfenstein ◽  
H. L. Brooks ◽  
H. P. Pieper
Keyword(s):  
Arterial Pressure ◽  
Blood Volume ◽  
Characteristic Impedance ◽  
Aortic Pressure ◽  
External Diameter ◽  
Cross Sectional ◽  
Circulating Blood Volume ◽  
Acute Hemorrhage ◽  
Catheter Tip ◽  
Chronically Instrumented Dogs

Experiments on five chronically instrumented dogs were performed to study the effects of changes in circulating blood volume on the aortic smooth muscle activity in awake animals. The external diameter of the proximal descending aorta was measured with a sonomicrometer. Aortic pressure was measured in the same cross-sectional area with a catheter-tip transducer. Acute hemorrhage of 15% of the estimated blood volume was performed 17 times by quickly withdrawing blood through a jugular cannula. At any given arterial pressure within the range of overlap the aortic diameter (D) was always decreased after hemorrhage compared with control, and the pressure-strain elastic modulus (Ep) and the characteristic impedance (Zc) were always increased. For example at 140 kdyn X cm-2 (104.5 mmHg) delta D = -0.61 +/- 0.12 mm or delta D = -3.44 +/- 0.68% of control, delta Ep = 31.0 +/- 8.6%, and delta Zc = 22.6 +/- 4.5%. Each of these changes was significant with P less than 0.01. Volume expansion of 30% was performed eight times by infusing warm saline. At any given arterial pressure D was always increased and Ep and Zc were always decreased. At 140 kdyn X cm-2 delta D = 0.55 +/- 0.15 mm or delta D = 3.12 +/- 0.95% of control, delta Ep = -12.4 +/- 3.2%, and delta Zc = -12.0 +/- 2.1%. Each of these changes was significant with P less than 0.01. Since in these awake animals the changes in circulatory blood volume modified the arterial pressure only slightly, the contribution of viscoelasticity and myogenicity to the observed responses was minimal.

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