PubMed · 16579156
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Ellen Barker. 2006. A new weapon to combat stroke.. https://pubmed.ncbi.nlm.nih.gov/16579156/
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INTRODUCTION: Cerebral embolism is the principal cause of cerebral infarction. Recently, mechanical embolectomy has been proposed as an effective method. We performed a preclinical evaluation of a new mechanical clot-retrieving wire. METHODS: This clot-retrieving wire consisted of three nitinol loops at the tip of a microguidewire. These three loops could be collapsed into a 0.018-inch wire compatible microcatheter. Each loop was 8 mm long and 3.5 mm wide. For simulation, polyvinyl alcohol (PVA) vascular anatomical models of the human carotid (eight models) and vertebrobasilar (three models) circulation were constructed. A pulsatile flow circulation system was used. Embolic clots were produced using pig blood plasma. The microcatheter and the microguidewire were advanced beyond the clot. The wire was then exchanged for the retrieving wire. The microcatheter was then pulled slightly back to open the loops. The clot was then caught by withdrawal of the system. Once caught, the clot was retrieved to the guiding catheter tip. We investigated the following points: ease of device deployment, clot capture ability, clot removal against blood flow and removal of the clot out of the introducer system. RESULTS: A total of 104 procedures were performed in 11 PVA models and evaluated. The drop rate was 19%. We succeeded in partial and total recanalization in 51.0% of the procedures (53/104) within 30 minutes. CONCLUSION: This new clot-retrieving wire could be useful for mechanical clot extraction in stroke.
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We report a case of a 61-year-old woman with progressive dyspnoea, fatigue and tiredness over the last two weeks. Based on physical examination on admission, ECHO and CT exams, a diagnosis of massive pulmonary embolism was confirmed and the patient received thrombolytic treatment. Since no response to thrombolysis was apparent and the patient was clinically unstable with persisting signs of right ventricular dysfunction in echocardiography, a rescue surgical embolectomy was ordered and performed using cardiopulmonary bypass. Multiple large clots were removed from both pulmonary arteries. Following embolectomy, severe irreversible right ventricular failure developed and the patient died. Autopsy revealed large blood clots in peripheral pulmonary circulation causing terminal right-heart failure. We discuss the therapeutic options in massive pulmonary embolism and the potential role of rescue surgical embolectomy.