Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.541511
Title: The effect of obesity on venous impedance and outflow measured by ultrasound
Author: Wall, Michael Lewis
Awarding Body: University of Birmingham
Current Institution: University of Birmingham
Date of Award: 2011
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Abstract:
Obesity has been identified epidemiologically as a risk factor for development of chronic venous disease. To examine whether abdominal adiposity obstructs venous outflow from the legs, 26 females aged 34-49 years with no clinical venous disease and body mass index (BMI) between 20.9 – 46.7 kg/m\(^2\) were studied. A novel measurement of the extent of abdominal fat along the legs when seated correlated well with BMI and other measures of central fat (sagittal-abdominal diameter, ultrasound fat thickness, % truncal fat by DEXA scan). On sitting, inguinal tissue pressure recorded by needle manometry increased more in obese (BMI > 30) than normal weight (BMI 20-25) subjects (8.2 vs 1.5 mmHg, p<0.01) as did the femoral vein cross-sectional area (129 vs 60%, p<0.05). Both measures correlated with increasing abdominal fat but were not associated with each other. In the lower leg, saphenous vein distensibility and compliance correlated positively with abdominal fat and BMI, but there was no such association for the popliteal vein. Female sex hormones, physical activity levels and insulin status did not affect venous haemodynamics. Thus, increased abdominal fat can potentially hinder venous return when sitting, leading to distension and changes in vein biomechanics, which could over time contribute to venous disease.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (M.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.541511  DOI: Not available
Keywords: R Medicine (General) ; RA Public aspects of medicine ; RA0421 Public health. Hygiene. Preventive Medicine
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