The Recall Desk
CriticalFDA (Devices)·Z-2428-2025·Announced 2025-09-10

Transseptal access systems recalled over higher air embolism risk without controlled ventilation

Boston Scientific is recalling WATCHMAN TruSeal Access Systems after identifying a higher likelihood of air embolism when procedures are performed without positive pressure-controlled ventilation. 340,185 units are affected.

What this means for you

Highest-severity recall. Risk of serious injury or death is documented or strongly suspected. Stop using the product now and follow the agency's instructions.

Our severity reasoning: The rubric assigns 5 to any FDA Class I recall, and the FDA classified this transseptal access system action as Class I.

Plain-English summary

The WATCHMAN TruSeal Access System ANT, material number M635TS70040, GTIN 08714729965756, is being recalled across all non-expired batches. The system is intended to provide vascular and transseptal access for WATCHMAN Left Atrial Appendage Closure Devices with delivery systems. The recall covers 340,185 units distributed worldwide.

Boston Scientific identified a higher likelihood of air embolism events when procedures are performed without positive pressure-controlled ventilation. The company states that, according to published literature and clinical data, in percutaneous procedures requiring transseptal access to the left atrium under conscious or deep sedation, patients have an approximately three times higher risk in a US study of negative left atrium pressure and air ingress. The risk is described as especially prevalent in patients with pre-existing low left atrial pressure, hypovolemia and partial upper airway collapse. The FDA classified the action as Class I, its most serious category.

Hospitals and proceduralists should follow the manufacturer's updated instructions on ventilation during these procedures.

The recalled product

Product
WATCHMAN TruSeal Access System ANT, OUS, Material Number (UPN) M635TS70040; intended to provide vascular and transseptal access for all WATCHMAN Left Atrial Appendage Closure Devices with Delivery Systems.
Manufacturer
Boston Scientific Corporation
Hazard
  • air-embolism
  • transseptal-access
  • ventilation
  • class-i

Is your product affected?

Check your packaging against the codes below. If any of them match, the product is part of this recall.

Lot numbers (2)

  • GTIN 08714729965756
  • ALL NON-EXPIRED BATCHES

Distribution

Distribution scope not specified by the agency.