It was reported that the balloon failed to deflate and a vessel occlusion occurred.The 90% stenosed target lesion was located in the mildly tortuous and mildly calcified proximal left main lesion.A 5.00 x 16mm synergy megatron was selected for use in the percutaneous coronary intervention (pci) procedure.There a significant bend involved in the lesion.The lesion pre dilated with 1.5,2.5 and 3.0 nc emerge balloon.There was no difficulty advancing the device over a non boston scientific wire and through the guide catheter.The synergy megatron stent had delivered through the struts of a transcatheter aortic valve replacement (tavr) valve.The synergy was delivered to the lesion site and the balloon inflated once at 12 atmospheres for 10 seconds.After the stent implanted, the physician attempted to deflate the balloon for 20 seconds, but the balloon was unable to deflate, retrieve and vessel occlusion occurred.Then, the physician cut the back end of the stent catheter and deliver a guide extension catheter over it in order to retrieve the balloon.The device was removed by sheathing it inside of a guide extension catheter and the balloon was removed in partially inflated.It was notice the balloon was stretched and deformed upon retrieval, and the device removed from the patient intact.The guidewire able to be removed from the device once outside the patient.The procedure was completed with this device.There were no further patient complications, the patient was stable and fully recovered at the end of the procedure.
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