Browsing by Author "Wijesinghe, R. A. N. K."

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Determination of air way pressure generated by positive expiratory pressure device (blow bottle) using computational fluid dynamic analysis
    (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018) Silva, M. D. C.; Wijesinghe, W. L. P. K.; Atapattu, P. M.; Fernando, S.; Wijesinghe, R. A. N. K.; Santos, M. D.
    Positive expiratory pressure (PEP) therapy is used by respiratory physiotherapists to prevent post-operative pulmonary complications such as atelectasis and pneumonia. PEP therapy involves breathing out against a resistor which generates a positive pressure in the airways which prevents airway closure. The blow bottle is a device easily assembled using a bottle with water and tubing. PEP is generated by the resistance caused when exhaling into the water via the tubing, In order to have airflow through the blow bottle, the patient has to establish a higher airway pressure than pressure at the bottom of the bottle during expiration. Studies on blow bottle PEP suggest that 10 cm H2O pressure has to maintain at the bottom of the bottle. The aim of this study was: 1) to determine the airway pressure generated by a blow bottle constructed with commercially available tubes of 40 cm length with 10 mm and 11mm inner diameter and 10 cm water column in the bottle, at 5, 10, 15, 20 and 25 L/min flows, and 2) to determine if the blow bottle is a threshold resistor device when constructed this way. The boundary element method in Analysis System (ANSYS) was used for the analysis of pressure variation along the tube from the bottom of the bottle to airway opening. The airway pressure tested for above mentioned flow rates varied between 9.5 cm H2O-10.8 cm H2O for a tube with 10 mm inner diameter and 9.8 cm H2O -11.2 cm H2O for a tube with 11mm inner diameter. The results are within recommended pressure range for PEP. Hence tubes with 10 mm - 11mm inner diameter, 40 cm length and 10 cm water height maintained in the tube are suitable for a PEP device generating approximately 10 cm H2O pressure at the water seal.
  • Thumbnail Image
    Item
    Relationship between angina and physical activity to the Quality of Life (QOL) of patients following Coronary Artery Bypass Graft (CABG)
    (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018) Aberathna, A. M. I. S.; Danasekara, D. R. S. R.; Wickramarachchi, W. A. T. R.; Jayathissa, S. N. E.,; Bandara, S. M. K. B.; Karunaratna, N. G. K. D.; De Silva, H. M. Y. R.; Senevirathna, N.; Wijesinghe, R. A. N. K.
    Coronary artery disease has been identified as the most common cardio vascular disease. Prevalence of coronary artery disease is on the rise in Sri Lanka resulting in high hospital admission, morbidity and mortality. Coronary artery bypass graft surgery is one of the major treatment procedures in coronary revascularization. The main goals of coronary artery bypass graft include improving chance of survival, improving quality of life to resume an active life style and reducing angina. An individual’s quality of life is defined as general wellbeing and negative and positive features of life. This study was conducted to find out the relationship between angina and physical activity to the quality of life in patients after coronary artery bypass graft. This was a descriptive cross sectional study of 90 patients after coronary artery bypass graft 9 to 15 months following the surgery who attended cardiology and cardiothoracic clinics at Sri Jayawardhanapura General Hospital. Data was collected via quality of life questionnaire, six-minute walk test and Canadian cardiovascular society grading of angina pectoris. Quality of life was measured by using self-administered Nottingham Health Profile questionnaire and the Canadian cardiovascular society grading of angina was used to evaluate the angina grade of the patient. Six-minute walk test was performed by each patient under close observation of the interviewer. Patients with angina grade I had a good quality of life (Nottingham health profile score 0-0.26) in 61.2% and poor quality of life (Nottingham health profile score  0.27) in 38.8%. Patients with angina grade II had a good quality of life in 36.6% and poor quality of life in 63.4%. Hence there is a significant association between poor quality of life and angina grade II (p=0.02). The physical activity after the coronary artery bypass graft was measured through the performance of average percentage of six-minute walk test ( 50% poor performance and 51% good performance). Patients with good physical activity (51% performance in sixminute walk test) had good quality of life in 54.2% and poor quality of life in 45.8%. Patients with poor physical activity ( 50% performance in six-minute walk test) had good quality of life in 33.3% while poor quality of life in 66.7%, even though the six-minute walk test was found not to be significantly associated with quality of life (p=0.114). Furthermore, a relationship was found between angina grade and physical activity (p=0.002).