{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,10]],"date-time":"2026-09-10T05:08:19Z","timestamp":1789016899030,"version":"build-2803163510"},"reference-count":31,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2020,8,18]],"date-time":"2020-08-18T00:00:00Z","timestamp":1597708800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Transfusion"],"published-print":{"date-parts":[[2020,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Lumbar puncture (LP) is a frequently performed diagnostic and therapeutic procedure in oncology patients. Transfusing to a minimum preprocedural platelet threshold of 50\u2009\u00d7\u200910<jats:sup>9<\/jats:sup>\/L is widely upheld without good quality evidence. The objective was to compare the outcomes of LPs performed with platelets above and below this threshold. An increased risk of adverse events in patients with lower platelet counts was not expected. As a corollary, transfusion reaction rates incurred by transfusing to this recommended threshold are also reported.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A total of 2259 LPs performed on 1137 oncology patients (adult, n = 871, and pediatric, n = 266) were retrospectively analyzed between February 2011 and December 2017. The incidence of LP\u2010related complications for groups above and below the minimum platelet threshold was compared. Traumatic tap was defined as 500 or more red blood cells per high\u2010power field in the cerebral spinal fluid. Groups were compared using the 2\u2010Proportion Z\u2010test and Fisher exact test.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>At time of LP, the total number of events with platelets less than 50\u2009\u00d7\u200910<jats:sup>9<\/jats:sup>\/L and\u200950\u2009\u00d7\u200910<jats:sup>9<\/jats:sup>\/L or greater were 110 and 2149, respectively. There were no significant differences in LP\u2010associated complications between patients with platelet counts above or below 50\u2009\u00d7\u200910<jats:sup>9<\/jats:sup>\/L (<jats:italic>P<\/jats:italic> =\u2009.29). Patients with a pre\u2010LP platelet count of less than 50\u2009\u00d7\u200910<jats:sup>9<\/jats:sup>\/L had a higher proportion of traumatic taps (<jats:italic>P<\/jats:italic> &lt;\u2009.001). Three patients developed transfusion\u2010related adverse events.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Patients with platelet counts less than 50\u2009\u00d7\u200910<jats:sup>9<\/jats:sup>\/L did not have a higher incidence of clinically significant post\u2013lumbar puncture complications (<jats:italic>P<\/jats:italic> =\u2009.29).<\/jats:p><\/jats:sec>","DOI":"10.1111\/trf.15988","type":"journal-article","created":{"date-parts":[[2020,8,28]],"date-time":"2020-08-28T05:42:45Z","timestamp":1598593365000},"page":"2243-2249","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Rethinking the need for a platelet transfusion threshold of <scp>50\u2009\u00d7\u200910<sup>9<\/sup>\/L<\/scp> for lumbar puncture in cancer patients"],"prefix":"10.1111","volume":"60","author":[{"given":"Helen H.","family":"Chung","sequence":"first","affiliation":[{"name":"Hospital Medicine Service, Department 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