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Related Concept Videos

Methods for Studying Drug Absorption: In vitro01:16

Methods for Studying Drug Absorption: In vitro

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In vitro experiments are crucial for understanding the transport and absorption of drugs through biological materials. These studies employ varied methods such as the diffusion cell method, the everted sac technique, and the everted ring technique.
The diffusion cell method uses a two-compartment cell, including a donor compartment with the drug solution, which simulates the environment where the drug is applied, and a receptor compartment with a buffer solution, which simulates the environment...
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In Vivo Clinical Evaluation of Human Intestinal Tissue Viability Using a Spectroscopic Method.

Deniz Karaçaylı1, Özgür Dandin2, Mustafa Örmeci2

  • 1Faculty of Medicine, Department of Biophysics, Akdeniz University, Antalya, Türkiye.

The Journal of Surgical Research
|July 19, 2025
PubMed
Summary

Diffuse reflectance spectroscopy (DRS) accurately identifies viable intestinal tissue during acute mesenteric ischemia (AMI) surgery. This real-time assessment guides optimal resection margins, improving patient outcomes and reducing complications.

Keywords:
Acute mesenteric ischemiaExploratory laparotomyIntestinal viability assessmentSurgical margin determinationVisible light diffuse reflectance spectroscopy

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Area of Science:

  • Medical Devices
  • Surgical Innovation
  • Gastrointestinal Surgery

Background:

  • Acute mesenteric ischemia (AMI) is a critical vascular emergency requiring precise surgical intervention.
  • Current diagnostic methods for intestinal viability have limitations, necessitating advanced real-time assessment tools.
  • Optimizing surgical margins in AMI is crucial to prevent complications like short bowel syndrome and sepsis.

Purpose of the Study:

  • To evaluate the efficacy of diffuse reflectance spectroscopy (DRS) in assessing intestinal viability during AMI.
  • To determine if DRS can accurately guide surgical resection margins in real-time.
  • To correlate DRS findings with histopathological assessments for improved surgical decision-making.

Main Methods:

  • Intraoperative diffuse reflectance spectral data were collected from seven patients undergoing laparotomy for AMI.
  • Hemoglobin absorption spectra were analyzed to calculate tissue oxygen saturation (StO2) using the A(577)/A(560) ratio.
  • The percentage decrease in oxygenation (ΔStO2%) between healthy and ischemic tissues was correlated with histopathological Chiu scores.

Main Results:

  • A significant correlation (P = 0.001) was found between ΔStO2% and histopathological Chiu scores, distinguishing viable from ischemic tissue.
  • A ΔStO2% threshold of 12.3 ± 2.6% was identified as critical for determining resection margins (Chiu score of 2).
  • DRS effectively differentiated between ischemic and non-ischemic intestinal segments.

Conclusions:

  • Diffuse reflectance spectroscopy (DRS) shows significant promise as an intraoperative tool for real-time margin assessment in AMI surgery.
  • DRS provides objective, quantifiable data to enhance clinical decision-making during laparotomy for AMI.
  • Utilizing DRS can potentially lead to improved surgical outcomes and reduced postoperative complications in AMI patients.