(19)

(11)

EP 2 572 170 A1

(12)

(43) Date of publication: 27.03.2013 Bulletin 2013/13 (21) Application number: 11721498.1 (22) Date of filing: 17.05.2011

(51) International Patent Classification (IPC):  G01F 1/40(2006.01) (86) International application number: PCT/EP2011/058008 (87) International publication number: WO 2011/144641 (24.11.2011 Gazette 2011/47)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 18.05.2010 US 345771 P 18.05.2010 US 345788 P 17.05.2010 SE 1050487 17.05.2010 SE 1050486 (71) Applicant: Mindray Medical Sweden AB 174 57 Sundbyberg (SE)	(72) Inventor: CEWERS, Göran S-216 42 Limhamn (SE) (74) Representative: KIPA AB  P O Box 1065 251 10 Helsingborg 251 10 Helsingborg (SE)