High speed phase modulators for silicon photonic integrated circuits: a role for lithium niobate?

  • Baets R
  • Kuyken B
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Abstract

Renal ischemia that occurs intraoperatively during procedures requiring clamping of the renal artery (such as renal procurement for transplantation and partial nephrectomy for renal cancer) is known to have a sig- nificant impact on the viability of that kidney. To better understand the dynamics of intraoperative renal ischemia and recovery of renal oxygenation during reperfusion, a visible reflectance imaging system (VRIS) was developed to measure renal oxygenation during renal artery clamping in both cooled and warm porcine kidneys. For all kidneys, normothermic and hypothermic, visible reflectance imaging demonstrated a spatially distinct decrease in the rel- ative oxy-hemoglobin concentration (%HbO2) of the superior pole of the kidney compared to the middle or inferior pole. Mean relative oxy-hemoglobin concentrations decrease more significantly during ischemia for normothermic kidneys compared to hypothermic kidneys. VRIS may be broadly applicable to provide an indicator of organ ische- mia during open and laparoscopic procedures.

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Baets, R., & Kuyken, B. (2019). High speed phase modulators for silicon photonic integrated circuits: a role for lithium niobate? Advanced Photonics, 1(03), 1. https://doi.org/10.1117/1.ap.1.3.030502

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