Correlating Infrared Surface Thermometry With Core Temperature Assessments in Simulated Cooling and Rewarming of Porcine Kidneys

IF 0.8 4区医学 Q4 IMMUNOLOGY

Transplantation proceedings Pub Date : 2026-07-01 Epub Date: 2026-06-11 DOI:10.1016/j.transproceed.2026.05.019

Martin Igbokwe, John Wang, Cory Byrne, Khushi A. Vyas, Mahmoud Richard-Mohammed, Abdullah Alfaifi, Alp Sener, Patrick P. Luke

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引用次数: 0

Abstract

Background

In developing strategies to analyze the effects of controlled rewarming of donor kidneys, accurate and reproducible measurements of renal temperatures are required. While invasive probes provide accurate core temperature measurements, they risk tissue damage and may compromise the sterile field. Infrared thermometry (IRT) offers a non-contact alternative, but correlation with renal core temperature remains insufficiently validated in transplant-related scenarios.

Objective

To correlate surface IRT temperatures compared with core temperature assessments in porcine models of donor kidney cooling and rewarming.

Methods

This study was conducted in a controlled surgical setting. Porcine kidneys were procured for study. Core temperatures were measured with a calibrated thermocouple probe (Physitemp Thermalert TH-8) inserted into the renal pelvis via the ureter. Surface temperature was recorded using a non-contact infrared thermometer (CEM DT-8839) held 10 to 15 cm perpendicular to the renal capsule. Measurements were obtained by both techniques every minute from cold flush with perfusion solution and during rewarming. Agreement between modalities was assessed with Bland–Altman analysis, and correlation was determined using Pearson’s coefficient.

Results

Across all phases, IRT measurements demonstrated strong correlation with core temperatures (r > 0.9, p < .001). Bland–Altman plots indicated minimal systematic bias, with narrower limits of agreement during steady-state cooling and wider variability during rewarming. IRT effectively tracked temperature trends, though minor deviations (±0.5–1.0°C) from core readings were observed during dynamic thermal transitions.

Conclusions

Surface IRT has strong correlation with core temperature during pig kidney cooling and rewarming. IRT is well suited for trend monitoring and intraoperative workflow guidance during evaluation of controlled rewarming of donor kidneys.

Abstract Image

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在模拟猪肾脏冷却和再加热过程中，红外表面测温与核心温度评估的相关性。

背景：在制定策略分析供体肾脏受控再温的影响时，需要精确和可重复的肾脏温度测量。虽然侵入性探针提供准确的核心温度测量，但它们有组织损伤的风险，并可能危及无菌领域。红外测温（IRT）提供了一种非接触式的替代方法，但在与移植相关的情况下，与肾核温度的相关性仍未得到充分验证。目的：比较猪供肾冷却和复温模型中表面IRT温度与核心温度的相关性。方法：本研究在手术控制环境下进行。获取猪肾用于研究。使用经校准的热电偶探头（Physitemp Thermalert TH-8）经输尿管插入肾盂测量核心温度。使用非接触式红外温度计（CEM DT-8839）记录表面温度，该温度计垂直于肾包膜10至15厘米。两种技术在灌注液冷冲洗和再加热时每分钟测量一次。使用Bland-Altman分析评估模式之间的一致性，使用Pearson系数确定相关性。结果：在所有阶段，IRT测量结果显示与核心温度有很强的相关性（r < 0.9, p < 0.001）。Bland-Altman图显示最小的系统偏差，在稳态冷却期间具有较窄的一致性限制，而在再变暖期间具有较大的变异性。IRT有效地跟踪了温度趋势，尽管在动态热转变期间观察到与核心读数的微小偏差（±0.5-1.0°C）。结论：表面IRT与猪肾冷却和复温过程中的核心温度有较强的相关性。IRT非常适合于趋势监测和术中工作流程指导，以评估供体肾脏的受控再温。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Transplantation proceedings 医学-免疫学

CiteScore

1.70

自引率

0.00%

发文量

502

审稿时长

60 days

期刊介绍： Transplantation Proceedings publishes several different categories of manuscripts, all of which undergo extensive peer review by recognized authorities in the field prior to their acceptance for publication. The first type of manuscripts consists of sets of papers providing an in-depth expression of the current state of the art in various rapidly developing components of world transplantation biology and medicine. These manuscripts emanate from congresses of the affiliated transplantation societies, from Symposia sponsored by the Societies, as well as special Conferences and Workshops covering related topics. Transplantation Proceedings also publishes several special sections including publication of Clinical Transplantation Proceedings, being rapid original contributions of preclinical and clinical experiences. These manuscripts undergo review by members of the Editorial Board. Original basic or clinical science articles, clinical trials and case studies can be submitted to the journal?s open access companion title Transplantation Reports.