Absolute near-infrared oximetry for urology: a quantitative study of the tissue hemoglobin saturation before and after testicular torsion in a rabbit model

Bertan Hallacoglu; Richard S. Matulewicz; Harriet J. Paltiel; Horacio Padua; Patricio Gargollo; Glenn Cannon; Ahmad Alomari; Angelo Sassaroli; Sergio Fantini

doi:10.1117/12.809609

23 February 2009 Absolute near-infrared oximetry for urology: a quantitative study of the tissue hemoglobin saturation before and after testicular torsion in a rabbit model

Bertan Hallacoglu, Richard S. Matulewicz, Harriet J. Paltiel, Horacio Padua, Patricio Gargollo, Glenn Cannon, Ahmad Alomari, Angelo Sassaroli, Sergio Fantini

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Proceedings Volume 7174, Optical Tomography and Spectroscopy of Tissue VIII; 71740L (2009) https://doi.org/10.1117/12.809609
Event: SPIE BiOS, 2009, San Jose, California, United States

Abstract

We present an experimental study on four rabbits to demonstrate the feasibility of near-infrared spectroscopy in the noninvasive assessment of testicular torsion. We used a multi-distance frequency-domain method, based on a fixed detector position and a 9-mm linear scan of the illumination optical fibers, to measure absolute values of pre- and post-operative testicular oxygen saturation. Unilateral testicular torsions (by 0°, 540° or 720°) on experimental testes and contralateral sham surgeries (no torsion) on control testes were performed and studied. Our results showed (a) a consistent baseline absolute tissue oxygen saturation value of 78% ± 5%; (b) a comparable absolute saturation of 77% ± 6% on the control side (testes after sham surgery); and (c) a significantly lower tissue oxygen saturation of 36% ± 2% on the experimental side (testes after 540° or 720° torsion surgery). These results demonstrate the capability of frequency domain nearinfrared spectroscopy in the assessment of absolute testicular hemoglobin desaturation caused by torsion, and show promise as a potential method to serve as a complement to conventional color and spectral Doppler ultrasonography.

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Bertan Hallacoglu, Richard S. Matulewicz, Harriet J. Paltiel, Horacio Padua, Patricio Gargollo, Glenn Cannon, Ahmad Alomari, Angelo Sassaroli, and Sergio Fantini "Absolute near-infrared oximetry for urology: a quantitative study of the tissue hemoglobin saturation before and after testicular torsion in a rabbit model", Proc. SPIE 7174, Optical Tomography and Spectroscopy of Tissue VIII, 71740L (23 February 2009); https://doi.org/10.1117/12.809609

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KEYWORDS

Testis

Surgery

Tissues

Near infrared spectroscopy

Optical fibers

Oxygen

Tissue optics

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