STUDY THE DEFICIENCY OF POTASSIUM, MANGANESE, COPPER AND ZINC CONCENTRATION IN THE ABDOMINAL AORTIC ANEURISM BY PIXE ANALYSIS

2007 ◽  
Vol 17 (03n04) ◽  
pp. 107-112
Author(s):  
S. VATANKHAH ◽  
K. MOOSAVI ◽  
J. SALIMI ◽  
M. LAMEHI ◽  
M. FARMAHINI FARAHANI
Keyword(s):  
Arterial Wall ◽  
Surgical Operation ◽  
Control Groups ◽  
Emission Analysis ◽  
Pixe Analysis ◽  
Copper And Zinc ◽  
Abdominal Aortic ◽  
Abdominal Aortic Aneurism ◽  
Age Range ◽  
Manganese Copper

The concentration of some trace elements especially potassium calcium, manganese, copper and zinc in the arterial wall tissue for the aneurism patients was studied by PIXE (Proton Induced X-Ray Emission) analysis. Comparing the results with normal aortic wall tissues has been done. All the patients are in the age range of 40-60 years. The samples are derived from 15 patients by surgical operation. The results show the absence of manganese, and decreasing of potassium, Copper and Zinc in the aneurismal tissues. Change in copper concentration in the arterial wall is important in the breakdown of the elastic layer in the aneurism. Elevation of the Calcium and Iron in the aneurism tissues are obtained in the comparison with the control groups. Deficiency or elevation of some elements in the aneurism aorta can be encountered as an indicator in the biopsy analysis.

scholarly journals Stability of Membrane Elastodynamics with Applications to Cylindrical Aneurysms

2011 ◽  
Vol 2011 ◽  
pp. 1-24 ◽  
Author(s):  
A. Samuelson ◽  
P. Seshaiyer
Keyword(s):  
Mathematical Model ◽  
Stability Analysis ◽  
Arterial Wall ◽  
Abdominal Aortic Aneurysms ◽  
Medical Problem ◽  
Aortic Aneurysms ◽  
Numerical Techniques ◽  
Abdominal Aortic ◽  
Complex Fluid ◽  
Fluid Solid Interaction

The enlargement and rupture of intracranial and abdominal aortic aneurysms constitutes a major medical problem. It has been suggested that enlargement and rupture are due to mechanical instabilities of the associated complex fluid-solid interaction in the lesions. In this paper, we examine a coupled fluid-structure mathematical model for a cylindrical geometry representing an idealized aneurysm using both analytical and numerical techniques. A stability analysis for this subclass of aneurysms is presented. It is shown that this subclass of aneurysms is dynamically stable both with and without a viscoelastic contribution to the arterial wall.

scholarly journals Prevalence of Abdominal Aortic Aneurysms in Over 65-Year-Old Men with Inguinal Hernias

2008 ◽  
Vol 90 (5) ◽  
pp. 386-388 ◽  
Author(s):  
Oliver Anderson ◽  
Sandy Shiralkar
Keyword(s):  
Abdominal Aortic Aneurysms ◽  
Aortic Aneurysms ◽  
Selective Screening ◽  
Ultrasound Scan ◽  
Inguinal Hernias ◽  
Abdominal Aortic ◽  
Male Patients ◽  
A Prospective Study ◽  
Old Men ◽  
Age Range

INTRODUCTION The aim of this study was to determine the prevalence of abdominal aortic aneurysms (AAAs) in over 65-year-old men who have inguinal hernias and discuss if pre-operative selective screening of this population is appropriate. PATIENTS AND METHODS A prospective study on 70 consecutive male patients with an age range of 65–88 years (mean, 74 years) who were referred to a single vascular consultant's out-patient clinic with an inguinal hernia were screened for the presence of an AAA with an ultrasound scan before hernia repair over a period of 3 years. RESULTS Two patients were found to have an AAA measuring 3.8 cm and 6.0 cm giving an AAA prevalence of 3% (exact 95% confidence interval = 0–10%). CONCLUSIONS This study does not demonstrate an increased AAA prevalence in over 65-year-old male patients with inguinal hernias, scanned pre-operatively when compared to screening programmes. Selective screening of this cohort cannot be justified on this evidence.

MECHANICAL PROPERTIES CHANGE IN THE RAT XENOGRAFT MODEL TREATED BY MESENCHYMAL CELLS CULTURED IN AN HYALURONIC ACID-BASED HYDROGEL

2018 ◽  
Vol 18 (05) ◽  
pp. 1850047
Author(s):  
MUSTAPHA ZIDI ◽  
ERIC ALLAIRE
Keyword(s):  
Mechanical Properties ◽  
Hyaluronic Acid ◽  
Arterial Wall ◽  
Cellular Therapy ◽  
Xenograft Model ◽  
Strain Energy Function ◽  
Aortic Aneurysms ◽  
Large Strains ◽  
Abdominal Aortic ◽  
Wall Stiffness

This study investigated the efficiency of a cellular therapy with mesenchymal stem cells (MSCs) cultured in an hyaluronic acid-based hydrogel on growth of abdominal aortic aneurysms (AAA) obtained in the rat xenograft model. The experimental model was devoted to create an AAA at D14 after grafting of a decellularized abdominal aorta obtained from guinea pigs before being transplanted into rats. At D21, geometrical measurements as radius and length of AAA were performed on untreated ([Formula: see text]) and treated ([Formula: see text]) arteries. When compared to different cases, it was shown that the proposed cellular treatment significantly reduced the expansion of radius and length of AAA. Furthermore, to explore the mechanical properties change of the arterial wall, an inverse finite element method was performed where AAA is represented by an elliptical geometry with varying thicknesses. To identify the material parameters, the AAA tissue was assumed to behave isochoric and isotropic undergoing large strains and described by the Yeoh’s strain energy function. Although limitations exist in this study such as the time of the experimental protocol, the isotropic behavior law of the AAA wall and the axisymmetric geometry of the artery, the results revealed that arterial wall stiffness change and the maximum effective stress decreased during expansion of AAA when cellular treatment is applied.

scholarly journals An unusual case of pheochromocytoma and unruptured abdominal aortic aneurism in a male Yorkshire terrier

2017 ◽  
Vol 86 (2) ◽  
pp. 99-104
Author(s):  
B. Á. Rodrigues ◽  
Q. G. Grangeiro ◽  
C. Scaranto ◽  
G. Konradt ◽  
M. V. Bianchi ◽  
...  
Keyword(s):  
Unusual Case ◽  
Watery Diarrhea ◽  
Post Mortem ◽  
Left Adrenal Gland ◽  
Aortic Aneurism ◽  
Abdominal Aortic ◽  
Abdominal Aortic Aneurism ◽  
Unusual Occurrence ◽  
Sudden Blindness ◽  
Yorkshire Terrier

A six-year-old, male Yorkshire terrier was presented with acute vomiting, anorexia, depression, watery diarrhea and sudden blindness. On the basis of a transabdominal ultrasonographic examination, the presence of a prominent aortic aneurysm was established. The aneurysm of the aorta was confirmed at post-mortem examination. Unexpectedly, a pheochromocytoma of the left adrenal gland was found to be involved with the aneurysm. In this case report, the unusual occurrence of a large, unruptured abdominal aortic aneurism (AAA) concurrent with a pheochromocytoma in a male Yorkshire terrier dog is discussed.

Mammary Tumors in a Colony of Beagle Dogs

1986 ◽  
Vol 23 (6) ◽  
pp. 741-749 ◽  
Author(s):  
J. E. Moulton ◽  
L. S. Rosenblatt ◽  
M. Goldman
Keyword(s):  
Morphological Type ◽  
Control Group ◽  
Beagle Dogs ◽  
Control Groups ◽  
First Occurrence ◽  
Closed Colony ◽  
Benign Mixed Tumor ◽  
Age Range ◽  
And Control ◽  
Mixed Tumors

In a lifetime study, female beagle dogs in a closed colony were administered 226radium and 90strontium. An unirradiated control group was included in the study. A total of 223 of 356 dogs at risk developed 1,112 mammary proliferative growths (hyperplastic nodules and neoplasms). There was no correlation between occurrence and types of lesions in radiation and control groups. The age range for first occurrence of lesions was 10.4 to 13.9 years; hyperplastic nodule and benign mixed tumor occurred 1 to 2 years earlier than other lesions. A multiplicity of growths of similar or different morphological type were common throughout the lifetime of the dog. The female beagles, collectively, developed 244 hyperplastic nodules, 78 adenomas, 694 benign mixed tumors, 78 carcinomas, 14 malignant mixed tumors, and four myoepitheliomas. Proliferations occurred with increasing frequency from the cranial to caudal mammary glands. Metastasis was found in 77% of the dogs with carcinoma. The median time from diagnosis to metastasis was 10 months, but was shorter in dogs with infiltrative carcinoma.

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