Analysis of breathing-related variations in ECG-triggered laser Doppler perfusion signals measured on the beating heart during surgery

Fors, CarinaLinköpings universitet,Biomedicinsk instrumentteknik,Tekniska högskolan (författare)

Laser Doppler perfusion monitoring (LDPM) is amethod to assess microvascular perfusion. A modified,ECG-triggered LDPM system has been developed tomeasure myocardial perfusion with minimum influencefrom heart motion. With this method, one systolic (PLS)and one diastolic (PLD) perfusion value is obtained.The aim of this study was to analyse breathing-relatedvariations in PLS and PLD measured during open-heartsurgery. The phase delays between PLS, PLD, meanarterial blood pressure (MAP), heart rate and, indirectly,the respiration were determined.MAP tended to be in phase with or precede thevariations in PLD, i.e., PLD was at a maximum at the endof inspiration or at the beginning of expiration. No clearrelation between PLS and any of the other signals couldbe found.

Casimir Ahn, HenrikLinköpings universitet,Thoraxkirurgi,Hälsouniversitetet(Swepub:liu)henah22 (författare)
Wårdell, KarinLinköpings universitet,Biomedicinsk instrumentteknik,Tekniska högskolan,MINT(Swepub:liu)karwa46 (författare)
Linköpings universitetBiomedicinsk instrumentteknik (creator_code:org_t)

Av författaren/redakt...: Fors, Carina; Casimir Ahn, Hen ...; Wårdell, Karin

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