However, in our research question, we are also imposing the condition that papers report on thrombectomy. To do that, we need to include an AND statement. So, we adjoin:
(“ischemic stroke”[MeSH Terms] OR “brain ischemia”[MeSH Terms] OR “acute ischemic stroke”) AND thrombectomy
Note that the word thrombectomy in this example will be expanded due to automatic term mapping.
Lastly, we further narrow to only include randomized controlled trials by filtering on publication type. You can do this in PubMed by specifying the field tag. We connect this condition by adding one additional AND statement.
(“ischemic stroke”[MeSH Terms] OR “brain ischemia”[MeSH Terms] OR “acute ischemic stroke”) AND thrombectomy AND Randomized Controlled Trial[pt]
So now our query is complete! As of this writing, this particular search will return 197 results on PubMed and 195 results on NK.