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Net revenues Other revenues (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jul. 01, 2018 | Jun. 30, 2019 | Jul. 01, 2018
Revenue, Major Customer [Line Items] |  |  |  |
Net revenues | $ 652,507 | $ 609,866 | $ 1,266,091 | $ 1,197,096
Vascular access |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Net revenues | 153,647 | 140,149 | 297,544 | 284,177
Anesthesia |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Net revenues | 85,723 | 89,311 | 165,975 | 174,233
Interventional |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Net revenues | 104,785 | 98,189 | 207,969 | 188,331
Surgical |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Net revenues | 95,570 | 90,517 | 182,289 | 176,138
Interventional urology |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Net revenues | 67,952 | 47,674 | 127,683 | 89,974
OEM |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Net revenues | 56,428 | 52,594 | 110,666 | 98,448
Other |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Net revenues | $ 88,402 | $ 91,432 | $ 173,965 | $ 185,795

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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