The device was not returned for analysis.Based on the additional information received, it was determined that the event of insufficient ice is most likely related to a temporary needle clog as the remaining needles used in the procedure performed adequately and troubleshooting resolved the problem on one of the two complaint related needles.If insufficient ice formation is observed during the procedure, the needle may be swapped for another, or trouble shooting steps as described in the user manual may resolve a temporary gas clog.The needle ifu advises the user to have an additional needle available and to "continuously monitor the cryoablation procedure using imaging guidance such as direct visualization, ultrasound, computer tomography (ct), or (when using mri-compatible needles only) magnetic resonance (mr)." continuous monitoring allows the physician to detect suboptimal ice formation.The event is unlikely to cause or contribute to a death or serious injury.
|