An embolism could obstruct blood flow to critical organs, leading to serious injury and/or a need to surgically extract the overflow material from the patient. Severe neurologic, cardiac, limb, renal, or gastrointestinal injury may result.

https://www.fda.gov/Safety/MedWatch/SafetyInformation/SafetyAlertsforHumanMedicalProducts/ucm592098.htm