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SureFlex™ Steerable Guiding Sheath

The SureFlex Steerable Guiding Sheath is a bidirectional steerable sheath engineered to provide maximum control during transseptal crossing.

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Feel control. See results.™

Experience controlled crossing, precise steering, and reliable performance in a bidirectional steerable sheath*

SureFlex Steerable Guiding Sheath

How it works

Animation showing the SureFlex Steerable Guiding Sheath

Controlled crossing*

The Steerable Sheath offers a smooth sheath-dilator transition and lower crossing force for greater control*

Precise steering*

Feel your curve, know your position. Achieve maximum precision and control* with TruGlide™ handling and intuitive tactile feedback

Reliable performance*§

Durable design is engineered to provide consistent sheath tip contact force and superior retention of curve range-of-motion*

Why choose the SureFlex Steerable Guiding Sheath 

Controlled crossing

Chart representing peak crossing force (N) observed for the SureFlex Steerable Guiding Sheath and a leading competitor.

Lower crossing force

A 27% lower peak crossing force and a smoother profile than the leading competitor*

SureFlex sheath/ dilator assembly with arrow indicating transition point.

Smooth transition

A 40% smoother dilator-to-sheath transition than the leading competitor*

SureFlex sheath with dilator radiopaque tips to visualize location

Radiopaque tip

Visualize your location with the radiopaque tips of the sheath and dilator 

Precise steering

SureFlex sheath tip deflecting from straight to 180 degrees.

TruGlide handling

Responsive, smooth, high-precision steering to confidently position your curve

Hand in surgical glove holding SureFlex Steerable Guiding Sheath, rotating dial between forefinger and thumb.]

Tactile feedback

Intuitive tactile feedback allows you to feel the extent of your curve deflection

Detail of braided design inside SureFlex Steerable Sheath that offers controlled torque.

Controlled torque

Accurately position with a 1:1 torque-response braided sheath*

Reliable performance

SureFlex Steerable Guiding Sheath in a 180-degree curved position with a compatible catheter.

Consistent contact force

Maintains 100% of its initial contact force following fatigue testing.§ In the same conditions, the leading competitor experienced 52% loss.*

SureFlex Steerable Guiding Sheath positioned in multiple, bidirectional curve angles.

Strong and durable

High performance sheath with greater durability than the leading competitor, remaining intact after 300 cycles of articulation*

SureFlex handle with arrows showing self-locking dial.

Self-locking dial

Maintain your curve with a self-locking dial

Reliable and consistent hub-snap mechanism

Consistent hub-snap mechanism with hemostatic valve, three-way stopcock, and sideport

SureFlex hub-snap mechanism with valve, stopcock, and sideport.

What’s included

The SureFlex Steerable Guiding Sheath includes three components: 

  • Sheath
  • Dilator
  •  J-tipped mechanical guidewire

Publication summaries

December 2021, Hiner et al., published in Journal of Cardiovascular Electrophysiology

This single-center retrospective analysis of catheter stability evaluated contact force consistency during radiofrequency ablation using two different steerable sheaths. 

White papers

September 2018

This study compared handling precision, steering response, and neutral zone consistency.

November 2017

This study compared sheath-to-dilator transition and crossing force. 

November 2017

This study compared sheath tip contact force, retention of curve range-of-motion (ROM), and resistance to failure. 

SureFlex Steerable Guiding Sheath



French size compatibility

8.5F (2.8 mm)

Sheath usable length

72 cm, 63 cm

Sheath overall length

93 cm, 84 cm

Sheath radiopaque marker

Platinum/iridium band

Dilator usable length

95 cm, 85 cm

Guidewire length

180 cm

Compatible guidewire

0.032” (0.81 mm)

Bidirectional curve angles

90° CCW, 180° CW

Ordering information

Sheath usable length

Distal curve diameter

Product code

72 cm

Small (17 mm)


Medium (22 mm)


Large (50 mm)


63 cm

Medium (22 mm)


Large (50 mm)



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* Bench testing or pre-clinical study results may not necessarily be indicative of clinical performance. The testing was performed by or on behalf of Boston Scientific. Data on file.

† Assessed by laser micrometery measurements along the length of the sheath-dilator transition (p<0.001, 5 SureFlex™ compared to 5 competitor sheaths) and by force gauge measurements during simulated transseptal crossing (p<0.001, 10 SureFlex™ compared to 8 competitor sheaths).

‡ Assessed by handle rotation to a full 360° to test axial torque transfer and the maximum rotational capabilities of each sheath (5 SureFlex™ sheaths compared to 3 competitor sheaths).

§ Assessed by full bidirectional articulation to maximal extension up to 10 times to achieve mechanical fatigue