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Indigenously developed ultrasound phantom model versus a commercially available training model: randomized double-blinded study to assess its utility to teach ultrasound guided vascular access in a controlled setting
Siju V Abraham1, Ronald Jaison Melit2, S Vimal Krishnan3, Tijo George4, Meenhas Oravil Kunhahamed5, CK Kassyap1, Sanjeev Bhoi6, Tej Prakash Sinha6
1 Department of Emergency Medicine, Jubilee Mission Hospital, Medical College and Research Institute, Thrissur, Kerala, India
2 Department of Vascular Surgery, Klinikum Herford, Schwarzenmoorstraße, Herford, Germany
3 Department of Emergency Medicine, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, Karnataka, India
4 Achutha Menon Centre for Health Science Studies, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India
5 Department of Emergency Medicine, Daya General Hospital Limited, Thrissur, Kerala, India
6 Department of Emergency Medicine, AIIMS Jai Prakash Narayan Apex Trauma Center, New Delhi, India
Correspondence Address:
Dr. Meenhas Oravil Kunhahamed
Daya General Hospital Limited, Thrissur - 680 022, Kerala
India
 Source of Support: None, Conflict of Interest: None
DOI: 10.4103/JMU.JMU_48_21
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Background: The commercially available training phantoms being expensive, homemade models are popular surrogates for training. We intended to study how comparable our indigenously developed ultrasound phantom (IDUP) was with the commercially available model for ultrasound-guided vascular access (USGVA) training. We also assessed the change in confidence among trainees using a 21-h standardized program. Methods: A prospective randomized double-blinded, parallel design study, with sequential allocation, was done after a standardized point of care ultrasound training course. Over three consecutive courses, 48 trainees volunteered to take part in the study. The models (IDUP and commercial phantom) were allocated as model A and model B. In each course, participants were also allotted sequentially to either perform in-plane or out of plane approach first, at the testing stations. Wilcoxon signed-rank test was used to compare pretest with posttest scores. Results: There was a statistically significant difference between IDUP and commercial phantom with respect to the resemblance to human tissue on tactile feedback and ease to perform the procedure. However, both models did not show a statistically significant difference in terms of ease of use, visual resemblance to human tissue, needle visualization, and artifacts on ultrasonography display. A significant change in the confidence levels of participants was seen postcourse. Conclusion: IDUP was a comparable alternative to the commercial model for USGVA training in a resource-limited setting. A 21-h standardized training program improved the trainee's confidence in performing and teaching USGVA.
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