Cyant: Once the models are created, which technologies did/do you use, and did you need to create anything new for your purpose?
Nicole: To print multi-color, multi-material 3D printed models, I initially used the Connex500 (Stratasys, Eden Prairie, MN) and most recently have been using the J750 (Stratasys, Eden Prairie, MN). This polyjet technology allows me to print a translucent kidney, along with the other key anatomical structures printed in various colors. The translucency of the 3D-printed models allows easy visualization of the location and size of the tumor as well as the relationship of the cancerous tumor to key anatomical structures such as the renal artery, renal vein, and renal collecting system.
Cyant: So this is opening some really interesting possibilities for medical applications! How is your idea helping physicians plan surgery and obtain new modes of visualization?
Nicole: 3D printed anatomical models help the surgeons to get a whole new perspective of the anatomy of interest. Instead of planning surgeries by simply looking at the medical images on a 2D computer screen, surgeons can hold these life-sized physical 3D printed models in their hands and immediately understand the disease. Patients, medical and/or biology (even high school!) students and professionals alike can better gauge actual dimensions (“My kidney is that big?”) and learn very intuitively from the 3D prints.
Cyant: How are you working with people with diverse skill sets (doctors, technicians) to put your idea to fruition? How receptive were they to your ideas? What have you learned from them in the process?
Nicole: I work closely with our urological surgeons to use 3D printed kidney and prostate tumor models for pre-surgical planning and intra-operative guidance. The urological surgeons believe that these models help them to understand the anatomy and plan procedures. Recently, we performed a retrospective study to determine whether patient-specific 3D printed renal tumor models change pre-operative planning decisions made by urological
surgeons in preparation for complex renal mass surgical procedures. Three
experienced urological surgeons reviewed each renal mass case individually and in a random order to plan an intervention first based on images alone, and again based on images and the 3D printed models. The urological surgeons completed questionnaires about their surgical approach and planning, comparing presumed preoperative approaches with and without the model. In addition, they recorded any differences between the plan and the actual intervention. The results revealed a change in the planned approach in all ten models!