(19)
(11)EP 2 407 118 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
19.03.2014 Bulletin 2014/12

(43)Date of publication A2:
18.01.2012 Bulletin 2012/03

(21)Application number: 11173450.5

(22)Date of filing:  11.07.2011
(51)International Patent Classification (IPC): 
A61B 19/00(2006.01)
(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
Designated Extension States:
BA ME

(30)Priority: 13.07.2010 US 835518

(71)Applicant: St. Jude Medical, Atrial Fibrillation Division, Inc.
St. Paul, Minnesota 55117-9913 (US)

(72)Inventors:
  • Koh, Steve
    South Pasadena, California 91030 (US)
  • Rosenberg, Stuart
    Castaic, California 91384 (US)
  • Ryu, Kyungmoo
    Palmdale, California 93551 (US)

(74)Representative: Kramer - Barske - Schmidtchen 
Landsberger Strasse 300
80687 München
80687 München (DE)

  


(54)Methods and systems for filtering respiration noise from localization data


(57) A method of filtering respiration noise from a localization signal includes acquiring a localization signal from at least one position measurement sensor within a localization field and acquiring an acceleration signal for at least one localization field generator (e.g., a patch electrode). A displacement signal for the field generator is calculated, for example by integrating the acceleration signal twice, and transformed into the frequency domain in order to calculate a fractional power indicative of patient respiration. The fractional power can then be compared to a threshold value, and the localization signal can be filtered if the fractional power exceeds the threshold value. Alternatively, the acquired acceleration signal can be used to gate collection of data points from the localization signal.







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