Which statement correctly describes sheath sizes for CSI, Rotoblator, OAS, and Turbohawk?

Which statement correctly describes sheath sizes for CSI, Rotoblator, OAS, and Turbohawk?

• A. CSI uses 6 Fr; Rotoblator uses 7 Fr; OAS uses 6 Fr; Turbohawk uses 7-8 Fr
• B. CSI uses 7 Fr; Rotoblator uses 6 Fr; OAS uses 8 Fr; Turbohawk uses 6 Fr
• C. Rotoblator uses 6 Fr; CSI uses 7 Fr; OAS uses 6 Fr; Turbohawk uses 8 Fr
• D. All devices use 6 Fr

Answer: (A)

Sheath size is all about the largest outer diameter of the device that must pass through the access sheath. Each device has its own delivery profile, so some can fit through a 6 Fr sheath while others need bigger lumens. The CSI catheter has a compact profile that fits through a 6 Fr sheath. The Rotablator’s burr and drive mechanism require a larger lumen, typically about 7 Fr. The Orbital Atherectomy System can also use a 6 Fr sheath in many configurations, while the TurboHawk catheter has a larger cross-section to accommodate its cutting head and debris management, requiring about 7–8 Fr. So the combination CSI 6 Fr, Rotablator 7 Fr, OAS 6 Fr, and Turbohawk 7–8 Fr reflects how each device’s delivery profile dictates the needed sheath size.

Sheath size is all about the largest outer diameter of the device that must pass through the access sheath. Each device has its own delivery profile, so some can fit through a 6 Fr sheath while others need bigger lumens. The CSI catheter has a compact profile that fits through a 6 Fr sheath. The Rotablator’s burr and drive mechanism require a larger lumen, typically about 7 Fr. The Orbital Atherectomy System can also use a 6 Fr sheath in many configurations, while the TurboHawk catheter has a larger cross-section to accommodate its cutting head and debris management, requiring about 7–8 Fr. So the combination CSI 6 Fr, Rotablator 7 Fr, OAS 6 Fr, and Turbohawk 7–8 Fr reflects how each device’s delivery profile dictates the needed sheath size.