Research Papers: Sensing

Needle stylet with integrated optical fibers for spectroscopic contrast during peripheral nerve blocks

[+] Author Affiliations
Adrien E. Desjardins, Marjolein van der Voort, Stefan Roggeveen, Gerald Lucassen, Walter Bierhoff, Benno H. W. Hendriks

Philips Research, Eindhoven, The Netherlands

Marcus Brynolf

Karolinska University Hospital, Department of Anesthesiology and Intensive Care, B31 Huddinge, SE-141 86 Stockholm, Sweden

Björn Holmström

Karolinska University Hospital, Department of Anesthesiology and Intensive Care, B31 Huddinge, SE-141 86 Stockholm, Sweden

Karolinska Institutet, Department of Clinical Science, Intervention and Technology, Stockholm, Sweden

J. Biomed. Opt. 16(7), 077004 (July 18, 2011). doi:10.1117/1.3598852
History: Received August 22, 2010; Revised April 27, 2011; Accepted May 19, 2011; Published July 18, 2011; Online July 18, 2011
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The effectiveness of peripheral nerve blocks is highly dependent on the accuracy at which the needle tip is navigated to the target injection site. Even when electrical stimulation is utilized in combination with ultrasound guidance, determining the proximity of the needle tip to the target region close to the nerve can be challenging. Optical reflectance spectroscopy could provide additional information about tissues that is complementary to these navigation methods. We demonstrate a novel needle stylet for acquiring spectra from tissue at the tip of a commercial 20-gauge needle. The stylet has integrated optical fibers that deliver broadband light to tissue and receive scattered light. Two spectrometers resolve the light that is received from tissue across the wavelength range of 500–1600 nm. In our pilot study, measurements are acquired from a postmortem dissection of the brachial plexus of a swine. Clear differences are observed between spectra acquired from nerves and those acquired from adjacent tissue structures. We conclude that spectra acquired with the stylet have the potential to increase the accuracy with which peripheral nerve blocks are performed.

Figures in this Article
© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Adrien E. Desjardins ; Marjolein van der Voort ; Stefan Roggeveen ; Gerald Lucassen ; Walter Bierhoff, et al.
"Needle stylet with integrated optical fibers for spectroscopic contrast during peripheral nerve blocks", J. Biomed. Opt. 16(7), 077004 (July 18, 2011). ; http://dx.doi.org/10.1117/1.3598852


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