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Net revenues Other revenues (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 01, 2018 | Jul. 02, 2017 | Jul. 01, 2018 | Jul. 02, 2017
Revenue, Major Customer [Line Items] |  |  |  |
Net revenues | $ 609,866 | $ 528,613 | $ 1,197,096 | $ 1,016,494
Vascular access |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Net revenues | 140,604 | 133,323 | 284,845 | 263,345
Anesthesia |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Net revenues | 89,810 | 85,938 | 175,229 | 167,143
Interventional |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Net revenues | 77,179 | 68,425 | 148,858 | 112,391
Surgical |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Net revenues | 90,489 | 90,740 | 176,139 | 178,044
Interventional urology |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Net revenues | 47,674 | 0 | 89,974 | 0
OEM |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Net revenues | 52,594 | 45,132 | 98,448 | 88,478
Other (3) |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Net revenues | $ 111,516 | $ 105,055 | $ 223,603 | $ 207,093

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