scholarly journals AN EXPERIMENTAL STUDY ON BLOOD FLOW RATE IN THE FEMORAL BONE MARROW CAVITY AFTER PROSTHETIC HIP REPLACEMENT

1994 ◽  
Vol 44 (6) ◽  
pp. 645-652
Author(s):  
YING MU
Keyword(s):  
Bone Marrow ◽  
Experimental Study ◽  
Blood Flow ◽  
Flow Rate ◽  
Hip Replacement ◽  
Blood Flow Rate ◽  
Femoral Bone ◽  
Marrow Cavity ◽  
Bone Marrow Cavity ◽  
Femoral Bone Marrow

scholarly journals Morphological Analysis of Medullary Cavity for Designing Personalized Femoral Stem

2021 ◽  
Author(s):  
Lin Wang ◽  
Kaijin Guo ◽  
Hong Zhu ◽  
Kunjin He ◽  
Weizhong Geng
Keyword(s):  
Bone Marrow ◽  
Monte Carlo ◽  
Probability Model ◽  
Femoral Stem ◽  
Region Of Interest ◽  
Morphological Parameters ◽  
Femoral Bone ◽  
Marrow Cavity ◽  
Bone Marrow Cavity ◽  
Femoral Bone Marrow

Abstract To improve the quality and efficiency of femoral stem prosthesis design, a Monte Carlo method based on femoral bone marrow cavity analysis is proposed to measure morphological parameters using anatomical semantics. The region of interest is the femur, which includes the medullary cavity and cortical region. After this region is extracted, the size of the cavity and region is simulated using the Monte Carlo method. Finally, based on clinical needs, the morphological parameters are calculated and analyzed based on the size of the region of interest. From the perspective of the probability model, the non-random problem of solving the cross-section area of the femoral marrow cavity is transformed into one having a random nature so that a probability model can be used. The experimental results show that this method is simple, flexible, and efficient. It provides a new and reasonable scientific method for comprehensively understanding the anatomical morphological changes of the femoral marrow cavity. The measurement and analysis of the morphological parameters of the femoral bone marrow cavity in this paper provide the necessary scientific theoretical support for improved morphologic research, design, and clinical selection of femoral stem prostheses and has important significance and application value in clinical practice.

scholarly journals Regional femoral bone blood flow rates in laying and non-laying chickens estimated with fluorescent microspheres

2021 ◽  
Author(s):  
Qiaohui Hu ◽  
Thomas J. Nelson ◽  
Roger S. Seymour
Keyword(s):  
Blood Flow ◽  
Metabolic Rate ◽  
Flow Rate ◽  
Laying Hens ◽  
Life Stage ◽  
Bird Species ◽  
Blood Flow Rate ◽  
Bone Blood Flow ◽  
Femoral Bone ◽  
Nutrient Foramen

The metabolic rate of vertebrate bone tissue is related to bone growth, repair and homeostasis, which are all dependent on life stage. Bone metabolic rate is difficult to measure directly, but absolute blood flow rate (Q̇) should reflect local tissue oxygen requirements. A recent ‘foramen technique’ has derived an index of blood flow rate (Qi) by measuring nutrient foramen sizes of long bones. Qi is assumed to be proportional to Q̇, however, the assumption has never been tested. This study used fluorescent microsphere infusion to measure femoral bone Q̇ in anaesthetised non-laying hens, laying hens and roosters. Mean cardiac output was 338±38 ml min−1 kg−1, and the two femora received 0.63±0.10 % of this. Laying hens had higher wet bone mass-specific Q̇ to femora (0.23±0.09 ml min−1 g−1) than the non-laying hens (0.12±0.06 ml min−1 g−1) and roosters (0.14±0.04 ml min−1 g−1), presumably associated with higher bone calcium mobilization during eggshell production. Estimated metabolic rate of femoral bone was 0.019 ml O2 min−1 g−1. Femoral Q̇ increased significantly with body mass, but was not correlated with nutrient foramen radius (r), probably due to a narrow range in foramen radius. Over all 18 chickens, femoral shaft Q̇/r was 1.07±0.30 ml min−1 mm−1. Mean Qi in chickens was significantly higher than predicted by an allometric relationship for adult cursorial bird species, possibly because the birds were still growing.

scholarly journals Acetabular and femoral bone marrow in patients with hip osteoarthrosis: Cellular landscape of immune and stromal compartments

Bone Reports ◽  
2021 ◽  
Vol 14 ◽  
pp. 100844
Author(s):  
Drenka Trivanovic ◽  
Janek Hader ◽  
Maximilian Leucht ◽  
Theresa Kreuzahler ◽  
Bianca Schlierf ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Femoral Bone ◽  
Femoral Bone Marrow

The Effect of Furosemide on the Intrarenal Blood Flow Distribution in the Dog

1972 ◽  
Vol 50 (8) ◽  
pp. 774-783 ◽  
Author(s):  
Serge Carrière ◽  
Michel Desrosiers ◽  
Jacques Friborg ◽  
Michèle Gagnan Brunette
Keyword(s):  
Blood Flow ◽  
Flow Rate ◽  
Urine Volume ◽  
Flow Distribution ◽  
Blood Flow Rate ◽  
Initial Distribution ◽  
Blood Flow Distribution ◽  
Intrarenal Blood Flow ◽  
Femoral Blood ◽  
Furosemide Administration

Furosemide (40 μg/min) was perfused directly into the renal artery of dogs in whom the femoral blood pressure was reduced (80 mm Hg) by aortic clamping above the renal arteries. This maneuver, which does not influence the intrarenal blood flow distribution, produced significant decreases of the urine volume, natriuresis, Ccreat, and CPAH, and prevented the marked diuresis normally produced by furosemide. Therefore the chances that systemic physiological changes occurred, secondary to large fluid movements, were minimized. In those conditions, however, furosemide produced a significant increase of the urine output and sodium excretion in the experimental kidney whereas Ccreat and CPAH were not affected. The outer cortical blood flow rate (ml/100 g-min) was modified neither by aortic constriction (562 ± 68 versus 569 ± 83) nor by the subsequent administration of furosemide (424 ± 70). The blood flow rate of the outer medulla in these three conditions remained unchanged (147 ± 52 versus 171 ± 44 versus 159 ± 54). The initial distribution of the radioactivity in each compartment remained comparable in the three conditions. In parallel with the results from the krypton-85 disappearance curves, the autoradiograms, silicone rubber casts, and EPAH did not suggest any change in the renal blood flow distribution secondary to furosemide administration.

The Effect of Hematocrit on the Clearance of Small Molecules during Hemodialysis

1983 ◽  
Vol 6 (3) ◽  
pp. 127-130 ◽  
Author(s):  
C. Woffindin ◽  
N.A. Hoenich ◽  
D.N.S. Kerr
Keyword(s):  
Blood Flow ◽  
Regression Analysis ◽  
Small Molecules ◽  
Flat Plate ◽  
Flow Rate ◽  
Distribution Curve ◽  
Blood Flow Rate ◽  
Hollow Fibre ◽  
Urea Clearance ◽  
Flow Rates

Data collected during the evaluation of a series of hemodialysers were analysed to see the effect of hematocrit on the clearance of urea and creatinine. All evaluations were performed on patients with a range of hematocrits with a mean close to 20%. The urea clearance of those in the upper half of the distribution curve (mean hematocrit 29.4%) was not significantly different from that of patients in the lower half of the distribution curve (mean hematocrit 16.9%) whether the clearance was studied at high or low blood flow rates and with hollow fibre or flat plate disposable hemodialysers. Likewise, there was no correlation between hematocrit and urea clearance by regression analysis. In contrast, the clearance of creatinine was affected by hematocrit being greater at lower hematocrit values. This difference was independent of blood flow rate and dialyser type and was confirmed by regression analysis.

Sign in / Sign up

Export Citation Format

Share Document