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Walker BJ, Cox BL, Cikla U, de Bellefon GM, Rankouhi B, Steiner LJ, Mahadumrongkul P, Petry G, Thevamaran M, Swader R, Kuo JS, Suresh K, Thoma D, Eliceiri KW. An Investigation Into the Challenges of Using Metal Additive Manufacturing for the Production of Patient-Specific Aneurysm Clips. J Med Device 2019. [DOI: 10.1115/1.4043651] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Cerebral aneurysm clips are biomedical implants applied by neurosurgeons to re-approximate arterial vessel walls and prevent catastrophic aneurysmal hemorrhages in patients. Current methods of aneurysm clip production are labor intensive and time-consuming, leading to high costs per implant and limited variability in clip morphology. Metal additive manufacturing is investigated as an alternative to traditional manufacturing methods that may enable production of patient-specific aneurysm clips to account for variations in individual vascular anatomy and possibly reduce surgical complication risks. Relevant challenges to metal additive manufacturing are investigated for biomedical implants, including material choice, design limitations, postprocessing, printed material properties, and combined production methods. Initial experiments with additive manufacturing of 316 L stainless steel aneurysm clips are carried out on a selective laser melting (SLM) system. The dimensions of the printed clips were found to be within 0.5% of the dimensions of the designed clips. Hardness and density of the printed clips (213 ± 7 HV1 and 7.9 g/cc, respectively) were very close to reported values for 316 L stainless steel, as expected. No ferrite and minimal porosity is observed in a cross section of a printed clip, with some anisotropy in the grain orientation. A clamping force of approximately 1 N is measured with a clip separation of 1.5 mm. Metal additive manufacturing shows promise for use in the creation of custom aneurysm clips, but some of the challenges discussed will need to be addressed before clinical use is possible.
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Affiliation(s)
- Brandon J. Walker
- Medical Engineering, Morgridge Institute for Research, 330 N. Orchard Street, Madison, WI 53715 e-mail:
| | - Benjamin L. Cox
- Medical Engineering, Morgridge Institute for Research, 330 N. Orchard Street, Madison, WI 53715 e-mail:
| | - Ulas Cikla
- Neurological Surgery, University of Wisconsin, 1111 Highland Avenue, Madison, WI 53705 e-mail:
| | | | - Behzad Rankouhi
- Department of Mechanical Engineering, University of Wisconsin, 1513 University Avenue, Madison, WI 53705 e-mail:
| | - Leo J. Steiner
- Medical Engineering, Morgridge Institute for Research, 330 N. Orchard Street, Madison, WI 53715
- Department of Biomedical Engineering, University of Wisconsin, 1550 Engineering Drive, Madison, WI 53706 e-mail:
| | - Puwadej Mahadumrongkul
- Medical Engineering, Morgridge Institute for Research, 330 N. Orchard Street, Madison, WI 53715
- Department of Mechanical Engineering, University of Wisconsin, 1513 University Avenue, Madison, WI 53706 e-mail:
| | - George Petry
- Medical Engineering, Morgridge Institute for Research, 330 N. Orchard Street, Madison, WI 53715 e-mail:
| | - Mythili Thevamaran
- Grainger Institute for Engineering, 1550 Engineering Drive, Madison, WI 53706 e-mail:
| | - Rob Swader
- Medical Engineering, Morgridge Institute for Research, 330 N. Orchard Street, Madison, WI 53715 e-mail:
| | - John S. Kuo
- Department of Neurosurgery and Mulva Clinic for the Neurosciences, Dell Medical School, University of Texas at Austin, 1701 Trinity Street, Stop Z1500, Austin, TX 78712 e-mail:
| | - Krishnan Suresh
- Department of Mechanical Engineering, University of Wisconsin, 1513 University Avenue, Madison, WI 53706 e-mail:
| | - Dan Thoma
- Grainger Institute for Engineering, 1550 Engineering Drive, Madison, WI 53706 e-mail:
| | - Kevin W. Eliceiri
- Medical Engineering, Morgridge Institute for Research, 330 N. Orchard Street, Madison, WI 53715
- University of Wisconsin, 1111 Highland Avenue, Madison, WI 53705 e-mail:
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