Access Sheath in Ureteroscopy: Functions, Sizes, and Selection Guide Wholesale

In modern urology procedures, the ureteral access sheath plays an important supporting role in improving efficiency and safety during ureteroscopy. While the focus is often placed on devices such as the digital ureteroscope, the access sheath is equally critical in facilitating smooth instrument passage and maintaining procedural stability.

What Is a Ureteral Access Sheath?

A ureteral access sheath is a hollow, flexible tube inserted into the ureter to provide a continuous working channel during ureteroscopy procedures. It allows repeated insertion and removal of instruments, including ureteroscopes and auxiliary devices, without causing excessive trauma to the ureter.

Access sheaths are commonly used in procedures such as kidney stone treatment and upper urinary tract exploration, where multiple instrument exchanges are required.

Main Functions of an Access Sheath

• Facilitates repeated access: Enables multiple instrument insertions without repeated dilation

• Reduces intrarenal pressure: Helps maintain safer pressure levels during irrigation

• Improves irrigation outflow: Supports better fluid circulation and visibility

• Protects the ureter: Minimizes trauma during instrument manipulation

Common Types and Sizes

Ureteral access sheaths are available in different diameters and lengths to accommodate various procedural needs. Selecting the appropriate size is essential for balancing access efficiency and patient safety.

Risks and Considerations

Although access sheaths provide significant benefits, improper use may lead to complications. Understanding potential risks is essential for safe application.

• Ureteral injury: Oversized sheaths may increase the risk of trauma

• Insertion difficulty: Tight anatomy may require careful dilation

• Pressure imbalance: Improper use may affect irrigation dynamics

Careful selection and proper technique are necessary to minimize these risks during ureteroscopy procedures.

How to Choose the Right Access Sheath

Choosing an appropriate ureteral access sheath depends on several clinical and technical factors:

For example, when using a disposable ureteroscope, ensuring compatibility between the sheath and the device diameter is critical for optimal performance.