Medical Technology SA - Volume 21, Issue 2, 2007
Volume 21, Issue 2, 2007
Author A.W. Van RijswijkSource: Medical Technology SA 21 (2007)More Less
Eventually, after many years, two new regulations have been promulgated, the first being the regulations relating to the registration of health practitioners restricted to non-clinical practice (Government Gazette no R223 of 29 February 2008.) and the second the regulations relating to the registration of intern Medical Technologists (Government Gazette no R 278 of 14 March 2008).
Source: Medical Technology SA 21, pp 3 –5 (2007)More Less
Background : The DiaMed-ID® micro typing system utilises a sephadex gel to capture agglutinate in a semi solid medium. This enhances visibility of agglutination compared to the traditional tube techniques. In the latter the agglutinate, particularly in weak reactions, is mixed with the free cells at the bottom of the tube, making visibility difficult. The tube technique has been the cornerstone of compatibility testing over the last 40 years, but the enhanced sensitivity of the gel technique has made the interpretation of tests more objective.
Study design and methods : This study aims to demonstrate how a combination of the two techniques can combine the advantages of both methods in the routine preparation of blood for transfusion to patients. The study compares cost, sensitivity and specificity of different combinations of techniques (Major Tube Cross-match, Major Gel Cross-match and Immediate Spin Crossmatch with antibody screening by the Gel method).
Results : The standard method detected 32 antibodies. The DiaMed-ID® system detected all the antibodies detected by the tube technique as well as a further nine antibodies undetected by the standard methods. The antibodies missed by the traditional tube method were all very weak and were from the Rhesus (Anti-D, Anti-C and Anti-E), Kell (Anti-Kell), Lewis (Anti-Lea) and Duffy (Anti-Fya) systems. No transfusion reactions were reported in these cases. Cost analysis indicated that the Immediate Spin Crossmatch with the DiaMed-ID® antibody screen was the most economical method, if the time factor is taken into consideration.
Conclusion : The Immediate Spin Cross-match was the fastest method to prepare blood for patients and therefore the most cost effective cross-match. The Gel Screening technique was the best method for detecting red cell antibodies and was therefore an improvement on the Tube Major Cross-match technique.
The Delphi technique as a tool to evaluate a concept CPD framework to be implemented by medical technologists in South AfricaSource: Medical Technology SA 21, pp 6 –12 (2007)More Less
A concept CPD framework, to be implemented by medical technology workers, was compiled and needed to be evaluated by professionals. The aim of this survey was to use the Delphi technique as a research tool to evaluate the concept CPD framework by a widely distributed group of medical technology workers.
The Delphi technique is a research tool organizing group communication in gaining consensus among a panel of experts. A monitoring team co-ordinated and evaluated the Delphi process in response to the feedback received by a panel of experts. Panellists are selected for their contribution to the topic under investigation. They do not normally interact with one another during the Delphi rounds.
Fifteen panellists, distributed throughout South Africa, participated. The panellists were knowledgeable about medical technology and CPD. During the three Delphi rounds, statements were added, moderated, rephrased and rated. This resulted in a final CPD framework that consisted of 71 statements, completed within the three month scheduled time frame and with a very high percentage co-operation of the panellists. The Delphi technique was found to be an ideal tool for evaluating the concept CPD framework among a widely distributed group of medical technology workers.
Source: Medical Technology SA 21, pp 13 –18 (2007)More Less
Objectives : This study was undertaken to screen 10-16 year old learners residing in three selected urban areas of Cape Town, South Africa for the presence of elevated blood pressure.
Methods : Blood pressure levels were measured using a commercially available semi-automatic blood pressure monitor in 338 randomly selected learners (school children) of both sexes, between the ages of 10-16 years. The blood pressure measurements were performed using standard procedures. Data on physical activity, demographics, lifestyle and family history was collected from participants by use of a structured questionnaire. Overweight and obesity was estimated according to the 'International obesity task force' (IOTF), criteria. Blood pressure levels were categorized using the guidelines of the Fourth Report on the Diagnosis, Evaluation, and Treatment of High Blood Pressure in Children and Adolescents.
Results : An overall mean systolic- and diastolic blood pressure levels of 102.94 ± 13.10 mmHg and 62.60 ± 10.16 mmHg (p < 0.05) respectively was obtained in learners. Elevated blood pressure levels were observed in 6.21% of learners, with the highest prevalence rates seen in females. No significant gender differences were observed between the two 'self-identified' learner racial groups (African & Coloured). 17.5% of learners reported a family history of hypertension, 73% of these were African learners. 15.7% of learners were overweight and 6.2% obese. On multiple linear regression of BMI, waist circumference and waist hip ratio, were found to be significantly associated with systolic blood pressure (SBP) whereas diastolic blood pressure (DBP) was only associated with waist circumference.
Conclusion : The high prevalence of elevated blood pressure levels observed in this study and its positive correlation with body mass index, suggests that hypertension may become a significant health condition in many future young South African adults.