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Radiology

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Browsing Radiology by Subject "Theses--Radiology."

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    The impact of HIV infection when superimposed on pulmonary tuberculosis (either active or sequelae tuberculosis) on the success of bronchial artery embolisation.
    (2011) Govind, Mayuri.; Maharajh, Jainendra.
    ABSTRACT Pulmonary Tuberculosis (PTB) rates in Kwa Zulu Natal (KZN) is amongst the highest in the South Africa and is often associated with Human Immunodeficiency Virus (HIV) co-infection. Bronchial Artery Embolisation (BAE) is an expensive, time consuming procedure requiring operator skill and is accompanied by risk to both patient and operator. Aim: To investigate the impact of HIV infection when superimposed on PTB (active or sequelae) on the success of BAE. Method: A retrospective cross sectional study with descriptive and analytical components of the BAE procedure between January 2006 and December 2007 was performed on sequential BAE studies. These were analyzed for procedural and clinical outcome and reasons for procedural failure were investigated. The impact of CD4 level on procedural and clinical failure was investigated for a subset of cases. Cases were included if they presented with massive or life threatening haemoptysis with a diagnosis of previous or active PTB (made clinically, radiologically or microbiologically) in whom HIV status is known and where the clinician assessed a need for BAE, but excluded any third or more attempt at the procedure for that patient. Results: The final sample size after exclusion of 91 cases is 107. Each attempt at BAE was viewed as an individual case. The study population is made up of 74 HIV positive and 33 HIV negative cases. The median CD4 level is 176 cells / microlitre. Statistically, procedural success does not imply clinically successful outcome.HIV status does not correlate significantly with clinical or procedural results of BAE.CD4 level does not correlate significantly with clinical or procedural results of BAE. There is no technical reason of statistical significance that impacts on the success of the procedure when correlated with HIV status. These include being unable to select, unable to subselect, unable to engage securely, reflux, presence of fistulae and the presence of spinal feeder arteries. The complication rate is not statistically significant when correlated with HIV status. The differences in follow up of clinically unsuccessful cases were not significant when correlated with HIV status. On imaging, all cases demonstrated pathology. No particular zone is significant when correlated with HIV status. The most common finding is parenchymal architectural distortion followed closely by features of active tuberculous infection and no statistical significance is attributed to either when correlated with HIV status. The detection of lymphadenopathy is noted in 19.1% of HIV positive cases and 42.4% of HIV negative cases, and is the only feature of significance when correlated with HIV status. Interpretation: Coinfection with HIV does not have an impact on the success of BAE in patients with active or sequelae PTB who present with massive or life threatening haemoptysis. The rate of technical failure of the procedure suggests that this needs to be performed by persons that are adequately trained. Technical success does not imply clinical success but this finding was not statistically significant when correlated with HIV status. Re-evaluation of the procedure technique and improvements in local practice may produce results that correlate better with international standards.
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    Life threatening haemoptysis : a clinical and radiological study.
    (2003) Corr, Peter David.; Lalloo, Umesh Gangaram.
    The investigation and management of patients with life threatening haemoptysis is a common clinical problem in South African Hospitals. Establishing the aetiology and origin of the haemorrhage and treating these patients is both difficult and expensive in terms of human and financial resources. The purpose of this study was to identify common local aetiologies for severe haemoptysis, review the investigation and treatment of these patients at Wentworth Hospital, Durban and to formulate a plan of management. Retrospective and prospective studies of consecutive patients treated at Wentworth Hospital were performed. In the prospective study a new embolic material gelatin linked acryl microspheres (embospheres) was used for bronchial artery embolization (BAE). The study demonstrated a change in the spectrum of aetiologies of haemoptysis, from bronchiectasis following tuberculosis to destructive pneumonias. The chest radiograph was always the initial imaging investigation but was found to be inaccurate in detecting the origin of the bleeding. High resolution computed tomography of the lungs (HRCT) was the single best investigation to detect the cause and origin of the haemoptysis. HRCT detected focal bronchiectasis and intracavitatory aspergillomas that were undetected on the chest radiograph. Pleural thickening detected on CT was a good indicator of the presence of transpleural collaterals. The major limitation with HRCT was that it could not be performed if the patient was too dyspnoeic to cooperate during the scan. The role of bronchoscopy appears limited in patients with severe haemoptysis to those patients who are potential surgical candidates. I found that bronchoscopy was not accurate in detecting the source of bleeding in the few patients in which it was performed. Bronchial arteriography remains the gold standard in the detecting the source of haemorrhage. Bleeding sites were detected on angiography in the presence of focal hypervascularity, neovascularity and the presence of broncho-pulmonary shunts. Bronchial arteries were hypertrophied in bronchiectasis but were normal in size in some patients who had acute pneumonias. Bronchial artery embolization was the treatment of choice for severe haemoptysis in the patients studied. The use of gelatin cross linked micro spheres has significantly improved the initial success rate following the procedure with less complications compared to the use of polyvinyl alcohol particles (PVA). It is important to identify systemic transpleural collaterals at arteriography and to embolize them to reduce recurrent haemoptysis. Patients with aspergillomas responded well to embolization. Recurrent haemoptysis remains the major limitation of BAE but is reduced with the use of micro spheres as embolic agents and thorough embolization of systemic collaterals on the affected side. Surgical resection was an option for a limited number of patients with focal disease in one lung and good respiratory reserve. The major limitation of the study was the absence of long term follow up to detect those patients with late recurrent haemoptysis.
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    Utilization of computed tomographic pulmonary angiography in clinically suspected acute pulmonary thrombo-embolism at Inkosi Albert Luthuli Central Hospital.
    (2014) Mbatha, Wonder-boy Eumane.; Maharajh, Jainendra.
    Abstract available in PDF file.