Karlen W, Lim J, Ansermino JM, Dumont GA, Scheffer C. Design challenges for camera oximetry on a mobile phone. In: Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). 2012 Jan.. p. 2448--51.      [DOI]      [Datei] 

Dunsmuir D, Petersen C, Karlen W, Lim J, Ansermino JM. The Phone Oximeter for Mobile Spot-Check. In: Abstracts of the 2012 Annual Meeting of the Society for Technology in Anesthesia (STA). West Palm Beach: Anesthesia and analgesia; 2012. p. S21.

Hudson J, Nguku SM, Sleiman J, Karlen W, Dumont GA, Petersen C, Warriner CB, Ansermino JM. Usability testing of a prototype Phone Oximeter with healthcare providers in high- and low-medical resource environments. Anaesthesia. 2012; 67(9):957--67.      [DOI]      [Datei] 

Karlen W, Pickard A, Daniels J, Kwizera A, Ibingira C, Dumont GA, Ansermino JM. Automated Validation of Capillary Refill Time Measurements Using Photo-Plethysmogram from a Portable Device for Effective Triage in Children. In: 2011 IEEE Global Humanitarian Technology Conference (GHTC). IEEE; 2011 Okt.. p. 66--71.      [DOI]      [Datei] 

Karlen W, Petersen C, Gow J, Ansermino JM, Dumont GA. An Adaptive Single Frequency Phase Vocoder For Low-power Heart Rate Detection. In: BIODEVICES 2011 - Proceedings of the International Conference on Biomedical Electronics and Devices, Rome, Italy, January 26-29, 2011. INSTICC Press; 2011. p. 30--35.

Karlen W, Pickard A, Ansermino JM. Automated Validation of Capillary Refill Time Measurements in Children. In: UBC Department of Anesthesiology, Pharmacology and Therapeutics 5th Annual Research Day. Vancouver, CA: 2011. p. 43.

Karlen W, Dumont GA, Petersen C, Gow J, Lim J, Sleiman J, Ansermino JM. Human-centered Phone Oximeter Interface Design for the Operating Room. In: Traver, Vicente and Fred, Ana and Filipe, Joaquim and Gamboa, Hugo, editors. Proc. of the Int. Conf. on Health Informatics (HEALTHINF). Rome, Italy: SciTePress - Science and and Technology Publications; 2011. p. 433--8.      [DOI]      [Datei] 

Karlen W, Hudson J, Lim J, Petersen C, Anand R, Dumont G, Ansermino JM. The Phone Oximeter. In: IEEE Engineering in Medicine and Biology Society Unconference. Boston, USA,: 2011.

Pickard A, Karlen W, Petersen C, Ansermino JM. A novel method of measuring capillary refill time using photo-plethysmography. In: UBC Department of Anesthesiology, Pharmacology and Therapeutics 4th Annual Research Day. Vancouver, CA: 2010.

Karlen W, Petersen C, Pickard A, Dumont GA, Ansermino JM. Capillary Refill Time Assessment Using a Mobile Phone Application. In: Proceedings of the 2010 Annual Meeting of the American Society Anesthesiologists. San Diego: American Society of Anesthesiologists; 2010. p. A575.     [Datei] 

Karlen W, Turner M, Cooke E, Dumont GA, Ansermino JM. CapnoBase: Signal database and tools to collect, share and annotate respiratory signals. In: Annual Meeting of the Society for Technology in Anesthesia (STA). West Palm Beach: 2010. p. 25.      [DOI]      [Datei] 

Raman S, Karlen W, Ansermino JM. Estimating Respiratory Rate from the Photoplethysmogram. In: Child and Family Research Institute Summer Student Research Day. Vancouver, CA: 2010.