Abstract
Introduction: The internal three-dimensional structure of organs and patterns of blood vessels is complex and it is often difficult for medical students to visualize and interpret them. The corrosion cast technique is used to study the vascular patterns in kidney as it is one of the powerful tools with anatomical accuracy and durability.
 Aim: Preparation of corrosion casts of kidney using CAB (cellulose acetyl butyrate) granules for greater understanding of the spatial relationship of renal vasculature 
 Objectives
 
 To accelerate knowledge acquisition
 To determine student’s perception to the utility of corrosion casts of kidney in UG teaching
 
 Methodology: Corrosion cast technique involves injection of the cast material (CAB granules) dissolved in acetone into the renal vessels. Gradually, the volatile solvent evaporates and the solute solidifies inside the vessel forming solid permanent cast. The unwanted tissues are then washed away using corrosive agents like conc HCl resulting in three-dimensional representation of blood vessels. 
 The UG students were divided in 2 groups randomly having 50 students each. Half of the total participants received teaching lessons through a lecture discussing renal blood supply using corrosion casts while the rest with 2D images. The other aspects of teaching session, including content, teaching slides were kept identical in both batches. Crossing over was done.
 Results & Conclusion: Post session questionnaires were applied to assess knowledge acquisition and learner satisfaction. Feedback was taken of student’s perception on the utility of corrosion casts as an effective teaching – learning method. Analysis of feedback was done. Corrosion casts enhance the student’s skills in spatial visualisation of complex vascular relationships. This can be used for other topics as well.
 Keywords: corrosion casts, kidney, feedback
Highlights
The internal three-dimensional structure of organs and patterns of blood vessels is complex and it is often difficult for medical students to visualize and interpret these
The corrosion cast technique was used to study the vascular patterns in kidney as it is one of the powerful tools with anatomical accuracy and durability
Comparison of knowledge acquisition scores of test taken was done by unpaired t test
Summary
The internal three-dimensional structure of organs and patterns of blood vessels is complex and it is often difficult for medical students to visualize and interpret them. The internal three-dimensional structure of organs and patterns of blood vessels is complex and it is often difficult for medical students to visualize and interpret these. Undergraduate medical students studying human gross anatomy often have difficulty conceptualizing the internal three-dimensional structure of organs and the pattern of distribution of blood vessels. The corrosion cast technique was used to study the vascular patterns in kidney as it is one of the powerful tools with anatomical accuracy and durability. Casts for anatomical structures aim to elucidate otherwise complex anatomical spatial relationships (Henry et al, 1998) They offer 3D information not readily discernible from 2D pictures or gross specimens. These 3D replicas are based on real specimens to support the learning process (Aultman et al 2003) rather than learning from theoretical descriptions (Henry, 1992)
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