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18 August 2025 | Story André Damons | Photo André Damons
Prof Hanneke Brits
Prof Gert van Zyl, Dean for the Faculty of Health Sciences, Prof Hanneke Brits, a family medicine specialist at the Free State Department of Health, as well as the Department of Family Medicine at the University of the Free State (UFS), Prof Anthea Rhoda, Deputy Vice-Chancellor: Academic, and Prof Nicholas Pearce, Head of the School of Clinical Medicine before the inaugural lecture.

Universities have an obligation to ensure that their assessments are sound and defendable when they confer degrees for professional qualifications, such as in medicine. Can institutions confidently defend these results and what are the implications if they pass a student who is not competent?

These were some of the questions Prof Hanneke Brits, a family medicine specialist at the Free State Department of Health, as well as the Department of Family Medicine, at the University of the Free State (UFS), addressed during her inaugural lecture on Tuesday (12 August). The UFS, she concluded at the end of her lecture, titled To pass or not to pass: Can we confidently defend the outcome of our assessments? can defend its clinical assessments with the implementation of effective workplace-based assessment and trained examiners. 

 

The implications of passing incompetent students 

According to Prof Brits, who has supervised numerous undergraduate and postgraduate student research projects, she chose this topic because decisions have consequences. She gave an overview of the assessments in the clinical years of the undergraduate medical programme. In so doing, she also answered other questions including what may happen when universities pass students who are not competent and what may happen if they fail competent students. When the university passed a candidate, she said, that candidate may register with a professional body like the Health Professions Council of South Africa to work as a doctor. 

“What are the implications if we fail to fail a student who is not competent? The implications are that patients may suffer if they are treated by an incompetent doctor, which may lead to the doctor running into trouble if it is found that their work is not up to standard. This may further lead the faculty being labelled as poor for training substandard doctors. 

“The throughput rate of the university may go down and the university may not get subsidy for the students. The student must repeat his module with a lot of emotional and financial burden. They public may suffer because there are not enough healthcare professionals to treat them. Therefore, we must get this right,” she said. 

When assessing students, assessors should start at the bottom: students should know, then they should know how, then they should show how and then they must do. All assessments should meet the basic requirements of validity, reliability, fairness, educational impact and feasibility, explains Prof Brits. 

 

Workplace-based training and assessment

During her PhD study, she looked specifically at assessments in the clinical years of the undergraduate medical programme. “It is quite complicated,” said Prof Brits, “to do assessment for professional qualifications as you need to obey to the rules and regulations of the Department of Education, the Department of Health, the Health Professions Council of South Africa, the Colleges of Medicine of South Africa because they are our examining body, as well as our own university rules and international assessment guidelines and best practices.” 

She compiled a framework to measure what they do at the UFS and found that the decision reliability was excellent – meaning the students that passed during the year passed at the end of the year and those that failed, failed. The reliability of some of the methods used for the final assessment was not good, however, if more assessments with supplementary exams were included, it was better. 

The conclusion of her study was that the UFS mostly complied with the regulations of the regulatory bodies. The recommendation from this study was to implement workplace-based assessment (WBA) to improve both the validity and reliability of assessments and to make it more defendable. Prof Brits explained that WBA is where students get regular assessment and feedback while they work and receive training in hospitals or clinics. “For example, the student is seeing a patient in the emergency department who was stabbed with a knife on his hand. Is the student able to assess the severity, can the student manage the wound and what about follow-up? 

“The advantage of WBA is that we train in real life situations and manage conditions that occur commonly. In real life situations, students use many senses while learning, e.g., seeing, hearing, touching, smelling, which all enhance knowledge retention. It is important that students receive feedback and that we document these encounters. To ensure a holistic approach to the management of patients we use Entrustable Professional Activities or EPAs – something that I can trust a person to do. It is a combination of knowledge, skills and attitudes.”

News Archive

Nanotechnology breakthrough at UFS
2010-08-19

 Ph.D students, Chantel Swart and Ntsoaki Leeuw


Scientists at the University of the Free State (UFS) made an important breakthrough in the use of nanotechnology in medical and biological research. The UFS team’s research has been accepted for publication by the internationally accredited Canadian Journal of Microbiology.

The UFS study dissected yeast cells exposed to over-used cooking oil by peeling microscopically thin layers off the yeast cells through the use of nanotechnology.

The yeast cells were enlarged thousands of times to study what was going on inside the cells, whilst at the same time establishing the chemical elements the cells are composed of. This was done by making microscopically small surgical incisions into the cell walls.

This groundbreaking research opens up a host of new uses for nanotechnology, as it was the first study ever in which biological cells were surgically manipulated and at the same time elemental analysis performed through nanotechnology. According to Prof. Lodewyk Kock, head of the Division Lipid Biotechnology at the UFS, the study has far reaching implications for biological and medical research.

The research was the result of collaboration between the Department of Microbial, Biochemical and Food Biotechnology, the Department of Physics (under the leadership of Prof. Hendrik Swart) and the Centre for Microscopy (under the leadership of Prof.Pieter van Wyk).

Two Ph.D. students, Chantel Swart and Ntsoaki Leeuw, overseen by professors Kock and Van Wyk, managed to successfully prepare yeast that was exposed to over-used cooking oil (used for deep frying of food) for this first ever method of nanotechnological research.

According to Prof. Kock, a single yeast cell is approximately 5 micrometres long. “A micrometre is one millionth of a metre – in laymen’s terms, even less than the diameter of a single hair – and completely invisible to the human eye.”

Through the use of nanotechnology, the chemical composition of the surface of the yeast cells could be established by making a surgical incision into the surface. The cells could be peeled off in layers of approximately three (3) nanometres at a time to establish the effect of the oil on the yeast cell’s composition. A nanometre is one thousandth of a micrometre.

Each cell was enlarged by between 40 000 and 50 000 times. This was done by using the Department of Physics’ PHI700 Scanning Auger Nanoprobe linked to a Scanning Electron Microscope and Argon-etching. Under the guidance of Prof. Swart, Mss. Swart en Leeuw could dissect the surfaces of yeast cells exposed to over-used cooking oil. 

The study noted wart like outgrowths - some only a few nanometres in diameter – on the cell surfaces. Research concluded that these outgrowths were caused by the oil. The exposure to the oil also drastically hampered the growth of the yeast cells. (See figure 1)  

Researchers worldwide have warned about the over-usage of cooking oil for deep frying of food, as it can be linked to the cause of diseases like cancer. The over-usage of cooking oil in the preparation of food is therefore strictly regulated by laws worldwide.

The UFS-research doesn’t only show that over-used cooking oil is harmful to micro-organisms like yeast, but also suggests how nanotechnology can be used in biological and medical research on, amongst others, cancer cells.

 

Figure 1. Yeast cells exposed to over-used cooking oil. Wart like protuberances/ outgrowths (WP) is clearly visible on the surfaces of the elongated yeast cells. With the use of nanotechnology, it is possible to peel off the warts – some with a diameter of only a few nanometres – in layers only a few nanometres thick. At the same time, the 3D-structure of the warts as well as its chemical composition can be established.  

Media Release
Issued by: Mangaliso Radebe
Assistant Director: Media Liaison
Tel: 051 401 2828
Cell: 078 460 3320
E-mail: radebemt@ufs.ac.za  
18 August 2010
 

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